Photovoltaic support strip steel shearing end face rebound segmented compression compensation system

Abstract

The present application relates to strip shearing technical field, specifically to a kind of photovoltaic support strip shearing end face springback segmented compression compensation system, for improving the problem that the end face datum is not stable and adjacent segment compression is discontinuous to produce broken line in the equal pressure control of existing segmented compression, which cannot match the mechanical differences of different functional compression sections.The system includes shearing module, segmented compression module, functional band mapping module, state acquisition module and compression compensation coordination module;Functional band mapping module maps the web area, mounting hole band, bending line area and edge area of subsequent cold-formed profile into different compression sections, and coordinates components to configure compression line offset, compression compensation upper limit and pre-pressing, locking pressure, timing of slow release, which is accepted by transition compensation section when exceeding limit in limit pressure section, and limits the difference of adjacent segment compression compensation according to local springback mutation.The system is used for belt jointing, pre-cutting before forming and other stations, so that end face springback release belt is continuously controlled and released.

Description

Technical Field

[0001] This invention relates to the field of strip steel shearing technology, and more particularly to a springback segmented clamping compensation system for the sheared end face of photovoltaic bracket strip steel. Background Technology

[0002] Photovoltaic bracket cold-formed components are typically formed from coated steel strip through processes such as uncoiling, leveling, punching, shearing, splicing, or roll forming. Before entering the roll forming process, the steel strip is still in a flat state, and its width direction already corresponds to the web area, guide rail load-bearing area, mounting hole area, bending line neighborhood, rolled edge area, and edge area in the subsequent profile.

[0003] In the shearing processes, such as end trimming after uncoiling, end shearing before coil splicing, preparation of the front face for splicing welding, and pre-cutting or removal of abnormal sections before forming, the narrow strip area near the sheared end face undergoes shear blade entry, plastic shearing, fracture separation, and unloading release. Due to residual stress from coiling in coated strip steel, weakening of local perforated strips, insufficient constraint of free edges, and differences in the timing of oblique blade entry, the sheared end face is prone to problems along the shearing line, including inconsistent springback, localized edge warping, perforated edge collapse, bending line indentation, edge collapse, or segmental boundary folds.

[0004] Existing methods such as integral plate clamping, equal-width and equal-pressure segmented clamping, or independent pressure increase based on the springback amount of a single segment typically aim to suppress the overall bulging of the strip steel. These methods are difficult to simultaneously meet the requirements for the flatness of the web area, guide rail bearing area, or joint reference edge relative to the end face, as well as the restrictions on indentation, corner collapse, and coating damage in the mounting hole area, bending line neighborhood, rolled edge area, and edge area.

[0005] CN221269807U discloses a strip steel shearing device, which uses a clamping mechanism and a straightening mechanism on the operating table to clamp the strip steel by moving the pressure plate down with the shearing blade, and straightening the two strip steel sections by straightening the sides of the strip steel to solve the problems of strip steel rebounding and tilting after being released from the steel coil, and shearing offset affecting subsequent welding. However, this solution still aims at overall clamping and side alignment of the strip steel, and does not distinguish between the subsequent web area, guide rail bearing area, mounting hole area, bending line neighborhood, rolled edge area and edge area corresponding to the strip steel in the flat state. Therefore, it cannot form differentiated clamping compensation for different cold bending functional areas, and it is also difficult to take into account both maintaining the flatness of the reference end face and pressure limiting protection of sensitive areas.

[0006] Publication No. CN202763184U discloses a torsion-resistant device for sheared sheet metal. This device uses multiple elastic support frames arranged in a row behind the shearing machine's worktable, concentrating the elastic support force near the shear seam area to balance the lateral bending force of the sheared sheet metal and solve the problem of torsion deformation easily occurring after shearing narrow strips of sheet metal. However, this solution primarily serves torsion resistance, without zoning based on the subsequent cold bending and unfolding functional zones of the photovoltaic bracket strip, and without setting pressure-limiting protection relationships for perforated strips, bending lines, rolled edges, and edge areas. If directly applied to shearing coated strip steel, it may still result in localized overpressure, segmental boundary folds, or indentations in sensitive areas, failing to achieve a balance between end-face reference maintenance and localized pressure-limiting protection. Summary of the Invention

[0007] The technical problem this invention aims to solve is that existing methods for shearing coated strip steel for photovoltaic brackets, such as overall pressure plate clamping, equal width and equal pressure segmented clamping, or independent increase of clamping compensation based on the springback amount of a single segment, cannot distinguish the subsequent cold bending functional area corresponding to the strip steel in the flat state. It is difficult to simultaneously ensure the flatness of the reference end face and the pressure limiting protection of the perforated strip, bending line, rolled edge and edge areas. Therefore, we propose a photovoltaic bracket strip steel shearing end face springback segmented clamping compensation system.

[0008] To achieve the above objectives, this application adopts the following technical solution: a photovoltaic bracket strip steel shearing end face springback segmented clamping compensation system, applicable to the shearing station when the strip steel is still in a flat state during the production of photovoltaic bracket cold-bending components. The shearing station includes a head end trimming shearing station after the steel coil is uncoiled and put on the line, a flush shearing station before the tail end of the previous coil of strip steel and the head end of the next coil of strip steel are joined, a shearing station for preparing the front end face of the joining welding, a pre-cutting shearing station before entering the roll forming machine, or an abnormal section removal shearing station before forming. The photovoltaic bracket strip steel is a coated steel strip used to form the photovoltaic bracket cold-bending profile, and its unfolded width corresponds to the unfolded cross-sectional dimensions of the C-shaped steel, U-shaped steel, Z-shaped steel, guide rail profile, beam profile, column profile, or other bracket profile formed by subsequent cold bending.

[0009] The photovoltaic bracket strip shearing end face springback segmented clamping compensation system of the present invention includes a shearing module, a segmented clamping module, a functional band mapping module, a status acquisition module, and a clamping compensation coordination module. The shearing module includes a shearing operating table and a shearing assembly. The shearing operating table is used to carry and position the photovoltaic bracket strip. The shearing assembly is used to shear the strip along a shearing line. The shearing line is a shearing position line formed in the width direction of the strip when the shearing assembly performs fracture separation on the strip. The direction of the shearing line is consistent with the unfolded width direction of the strip. The feeding direction of the strip intersects with the direction of the shearing line. The segmented clamping module includes multiple clamping sections arranged along the shearing line and acting on the end face springback release band. The end face springback release band is a narrow band area close to the shearing line and extending along the shearing line direction. This area undergoes changes such as end constraint release, residual stress release, local off-surface springback, burr flanging, edge collapse, or indentation during the shearing blade entry, plastic shearing, fracture separation, and unloading.

[0010] The functional strip mapping module is used to configure multiple clamping sections as a reference holding section, a sensitive pressure limiting section, an edge slow-release section, and a transition compensation section based on the unfolded functional strip information of the photovoltaic bracket cold-formed profile; the unfolded functional strip information is the width direction position information of each functional area of ​​the subsequent cold-formed profile corresponding to the current strip in the flat strip state, including at least one of the following: strip unfolded width, web area coordinates, guide rail bearing area coordinates, bending line coordinates, mounting hole area coordinates, pre-punched hole neighborhood coordinates, edge area width, edge rolling area coordinates, and shearing station type; The reference holding section is the clamping section corresponding to the web area of ​​the subsequent cold-formed profile, the bearing area of ​​the guide rail, or the reference edge of the connecting strip. The sensitive pressure limiting section is the clamping section corresponding to the mounting hole strip, the pre-punched hole neighborhood, the connecting hole neighborhood, the oblong hole neighborhood, or the bending line neighborhood. The edge relief section is the clamping section corresponding to the edge of the strip, the rolled edge area, or the subsequent edge forming area. The transition compensation section is the clamping section located between the reference holding section and the sensitive pressure limiting section, between the reference holding section and the edge relief section, or between different sensitive pressure limiting sections, used to accept changes in clamping behavior and clamping amount.

[0011] The state acquisition module is used to acquire at least one of the following: effective springback distance, clamping displacement, or shear entry phase of the end face springback release band. The effective springback distance is the end face height deviation after removing burr peaks, chip interference, and shear impact vibration, and is used to characterize the actual springback state of the end face springback release band after unloading. The clamping displacement is the actual clamping stroke, return displacement, or feedback displacement of the clamping actuator corresponding to each clamping section. The shear entry phase is the information on the sequential stages of the shearing blade cutting into different clamping sections along the shearing line direction. When the shearing assembly is a slanted blade shearing assembly or a swing-type shearing assembly, the entry phase is determined based on at least one of the shearing blade entry direction, shearing blade tilt angle, tool holder stroke signal, shearing cycle signal, and the center position of the clamping section. When the shearing assembly is a straight blade synchronous shearing assembly, the entry phase degenerates into a synchronous entry phase.

[0012] The clamping compensation coordination module is used to configure the clamping line offset, clamping compensation limit, and pre-compression, locking, and slow-release sequence of each clamping segment based on the functional clamping segment and status acquisition results. When the clamping compensation demand of the sensitive pressure-limiting segment or the edge slow-release segment exceeds its clamping compensation limit, the excess portion is allocated to the adjacent transition compensation segment. The difference in clamping compensation between adjacent clamping segments is limited according to the local springback mutation amount. The clamping line offset is the clamping contact line that forms actual clamping contact with the strip steel relative to the shear line in the strip steel feeding direction. The upward distance; the clamping amount includes at least one of clamping force, clamping displacement, holding time, or unloading slope; the upper limit of the clamping compensation amount is the maximum clamping compensation amount allowed to be executed by the corresponding clamping segment under the condition of not breaking the constraints of hole edge stability, bending line indentation, edge collapse, or coating damage; the pre-compression is the pre-compression before the shearing blade actually cuts into the corresponding clamping segment; the locking pressure is the holding compression during the shearing blade cutting, plastic shearing, and fracture separation stages; the slow release is the reduction of the clamping effect according to a predetermined release slope after the corresponding area is sheared.

[0013] Specifically, the shearing operating table includes a bearing platform, strip steel guides, end positioning components, and a support surface adjacent to the shearing line. The bearing platform is used to support the photovoltaic bracket strip steel in a flat state. The strip steel guides are used to limit the offset of the strip steel along the shearing line direction. The end positioning components are used to determine the position of the strip steel end face to be sheared in the feeding direction, so that the sheared strip steel end face corresponds to the reference end face for subsequent welding, continuous feeding, punching positioning, or roll forming. The support surface adjacent to the shearing line is located near the lower shearing blade and is used to support the end face springback release strip. The shearing operating table is a workpiece bearing, guiding, and positioning structure in the shearing station and does not independently undertake the function of clamping compensation calculation.

[0014] Specifically, the shearing assembly includes an upper shearing blade, a lower shearing blade, a blade holder, and a driving component; the lower shearing blade is located near the shearing line, the upper shearing blade is mounted on the blade holder, and the driving component drives the blade holder to move along the pressing direction or to make a swinging motion, so that the upper and lower shearing blades cooperate to shear the strip steel for photovoltaic brackets; the shearing assembly can be a bevel shearing assembly, a swinging shearing assembly, or a straight-blade synchronous shearing assembly, wherein the bevel shearing assembly or the swinging shearing assembly has a first-entry blade side and a second-entry blade side along the shearing line direction, and the straight-blade synchronous shearing assembly enters the blade substantially synchronously along the shearing line direction.

[0015] Specifically, the segmented clamping module is located in the area adjacent to the shear line. Each clamping segment includes a clamping block and a clamping actuator that drives the clamping block to move along the clamping direction. The clamping block forms a clamping contact surface on the side near the strip. The clamping contact surface can be a plane, a micro-arc surface, or a plane with chamfers. The clamping actuator can be a hydraulic actuator, a pneumatic actuator, a servo electric cylinder, an electromagnetic actuator, or an elastic preload fit active adjustment component. The type of actuator is not a necessary limitation of this invention, as long as it enables the corresponding clamping segment to form an adjustable clamping displacement, clamping force, or clamping holding sequence.

[0016] Preferably, the functional strip mapping module configures the functional types of each clamping section in the order of priority of the forced protection boundary; wherein, the mounting hole strip, the pre-punched hole neighborhood, and the bending line neighborhood correspond to the sensitive pressure limiting section, the strip edge area and the rolled edge area correspond to the edge slow-release section, the web area, the guide rail bearing area, or the strip reference edge correspond to the reference holding section, and the clamping section located between different functional sections corresponds to the transition compensation section; when a clamping section covers multiple unfolded functional strips at the same time, the functional type of the clamping section is determined in the order of mounting hole strip or pre-punched hole neighborhood, bending line neighborhood, edge area or rolled edge area, web area or guide rail bearing area, and ordinary area; the forced protection boundary is the pressure limiting protection boundary determined according to the mounting hole, bending line, edge, or rolled edge area, which takes precedence over the ordinary equal width segmentation rule.

[0017] Preferably, the sensitive pressure limiting section includes a hole strip pressure limiting section and a bending line pressure limiting section; the hole strip pressure limiting section corresponds to the area adjacent to the mounting hole strip, oblong hole, connecting hole, pre-punched hole, or the area where the hole edge is close to the shear line, and the bending line pressure limiting section corresponds to the area adjacent to the bending line in the subsequent cold bending forming; both the hole strip pressure limiting section and the bending line pressure limiting section are sensitive pressure limiting sections, but their clamping line offset, clamping compensation upper limit, and release sequence can be configured separately; the hole strip pressure limiting section and the bending line pressure limiting section are not, in principle, priority compensation areas, and are only allowed to undertake a low proportion of compensation within their own clamping compensation upper limit when there is no remaining compensation capacity in the adjacent transition compensation section and the reference holding section.

[0018] Preferably, the transition compensation section can be an independent compression section or a transition compensation execution group composed of adjacent compression sections. When there is no independent physical compression section between two functional sections, the compression compensation coordination module sets the adjacent compression section near the boundary of the functional sections as the transition compensation execution group, and realizes the transition compensation function through continuous changes in the compression line offset, the upper limit of the compression compensation amount, and the slow release slope. The transition compensation section or transition compensation execution group is used to receive the excess compensation amount waived by the sensitive pressure limiting section or the edge slow release section, and is used to limit the sudden change in the compression amount at the boundary of adjacent functional sections.

[0019] Preferably, the clamping compensation coordination module configures non-equidistant clamping line offsets according to the functional type of each clamping segment; wherein, the clamping line offset of the reference holding segment is smaller than the clamping line offset of the sensitive pressure limiting segment or the edge slow-release segment, and the clamping line offset of the transition compensation segment is between the clamping line offsets of adjacent functional segments, forming a continuous transition along the shear line direction; the continuous transition means that the clamping line offsets of adjacent clamping segments gradually change according to the clamping protection requirements of adjacent functional segments; the clamping line offset can be achieved by an adjustable slide, multiple rows of mounting holes, interchangeable clamping blocks, offset clamping pads, or multi-contact edge clamping components.

[0020] Preferably, the clamping compensation coordination module determines the clamping compensation amount for each clamping segment based on the functional clamping segment; the clamping compensation amount is at least one of the following: clamping force increment, clamping displacement increment, holding time increment, or unloading slope adjustment amount outside the basic clamping state; when the clamping force increment is used as the representative form of the clamping compensation amount, the first... The clamping compensation amount of each clamping section satisfies the following limiting relationship:

[0021] ,

[0022] in, For the first The amount of clamping compensation applied to each clamping section. For the first The upper limit of the clamping compensation amount of each clamping section. For the first Each clamping section maintains basic contact and shear retention with the minimum clamping compensation required. For the first Each clamping segment obtains clamping compensation requirements based on at least one of the following: basic holding requirements, effective springback distance, clamping displacement, cutting edge phase, and test cutting calibration results; the limiting relationship indicates that the clamping compensation amount is not lower than the minimum value required to maintain basic clamping, and does not exceed the upper limit of the clamping compensation amount of the corresponding functional segment.

[0023] Preferably, the first The upper limit of the clamping compensation amount of each clamping section satisfies the following relationship:

[0024] ,

[0025] in, For the first The equivalent bearing area of ​​each compression section For the first Each pressing section belongs to a functional pressing section The corresponding basic allowable contact pressure, Indicates the first The functional types of each compression section include a reference holding section, a sensitive pressure limiting section, a side release section, or a transition compensation section. For the first The local damage constraint coefficient of each compression segment; the equivalent bearing area By the The coverage width of each clamping section along the shear line direction and the effective contact width of the clamping contact surface in the feeding direction are determined, and the allowable contact pressure of the foundation is determined. The local damage constraint coefficient is determined by the type of functional clamping section, strip steel material, coating type, and the calibration results of the first piece trial cut. The local damage constraint coefficient of the reference holding section can be higher than that of the sensitive pressure limiting section or the edge slow-release section, and the local damage constraint coefficient of the transition compensation section can be determined according to the adjacent functional sections and their compensation tasks.

[0026] Preferably, when the compression compensation requirement of the sensitive pressure-limiting section or the edge slow-release section exceeds its upper limit of compression compensation, the compression compensation coordination module determines the excess compensation amount of the corresponding compression section and allocates the excess compensation amount to the adjacent transition compensation section; The over-limit compensation amount of each clamping section can be expressed as:

[0027] ,

[0028] in, For the first The compensation requirements for each compression section cannot be directly borne by this area; The compensation is allocated to adjacent transitional compensation sections with remaining compensation capacity; when an adjacent transitional compensation section reaches its maximum compression compensation amount, the... It can continue to diffuse to the second adjacent transition compensation section or the reference holding section with remaining compensation capacity; if there is still an unallocated portion, the unallocated portion is converted into the allowable controlled release amount of the corresponding sensitive pressure limiting section or the edge slow release section. The controlled release is to allow limited off-surface release of the local end face without exceeding the protection conditions of the corresponding functional area.

[0029] Preferably, the state acquisition module determines the local springback mutation amount based on the effective springback separation amount of adjacent clamping sections; the local springback mutation amount is used to characterize the degree of end face separation state change between a certain clamping section and adjacent clamping sections. The larger the local springback mutation amount, the easier it is for end face attitude changes to occur between adjacent clamping sections; the clamping compensation coordination module limits the clamping compensation amount difference between adjacent clamping sections based on the local springback mutation amount, so that the clamping compensation amount difference between adjacent clamping sections and the local springback mutation amount have an inverse constraint relationship.

[0030] Preferably, the difference in clamping compensation between adjacent clamping sections satisfies the following relationship:

[0031] ,

[0032] in, In order to be with the first The amount of clamping compensation performed by the previous clamping section adjacent to each clamping section. Based on the allowable difference in the amount of compression compensation. The coefficient representing the influence of local rebound mutation amount. For the first Localized rebound mutation near the compression section; The larger the value, the smaller the allowable difference in clamping compensation between adjacent clamping sections; when the distribution of excess compensation causes the difference in clamping compensation between adjacent clamping sections to exceed the above limit, the clamping compensation coordination module reduces the sudden increase in compensation in the transition compensation section, or continues to spread the compensation to the second adjacent transition compensation section.

[0033] Furthermore, when the shearing assembly is a slanted blade shearing assembly or a swing-type shearing assembly, the clamping compensation coordination module configures the pre-compression, locking, and slow-release sequence of each clamping segment according to the shearing entry phase; the clamping segment corresponding to the first entry side enters pre-compression before the shearing blade cuts in, and enters low-amplitude holding or slow-release after shearing in the corresponding area; the reference holding segment maintains locking pressure during shearing, and slows release after the adjacent transition compensation segment completes the connection; the clamping segment corresponding to the second entry side enters locking pressure later, and slows release after breaking in the corresponding area; the slow-release sequence of the transition compensation segment is later than the adjacent sensitive pressure limiting segment or the edge slow-release segment; the low-amplitude holding is a clamping holding that is lower than the locking state and higher than the fully released state, used to avoid immediate unrestrained release after shearing in the corresponding area.

[0034] Furthermore, the status acquisition module includes at least one of the following: end face height detection component, clamping displacement detection component, tool holder stroke detection component, shearing cycle signal acquisition component, and product formula reading unit; the end face height detection component is used to acquire the height deviation of the end face spring-off release band at different clamping sections along the shearing line direction; the clamping displacement detection component is used to acquire the actual clamping stroke of the clamping actuator corresponding to each clamping section; the tool holder stroke detection component or shearing cycle signal acquisition component is used to acquire the shearing start time, blade entry time, shearing completion time, and tool holder return time; and the product formula reading unit is used to read the unfolded functional band information of the current photovoltaic bracket cold-bent profile.

[0035] Furthermore, the state acquisition module acquires end face height data after shearing is completed and after passing through a delayed sampling window; the delayed sampling window is used to avoid the stage of maximum shearing impact; if a certain height point is significantly higher than the adjacent height point and its width conforms to the characteristics of a burr peak, then the height point is discarded as a burr peak; if the height data of the same clamping section is inconsistent with the clamping displacement feedback, or consistent with the vibration characteristics of the tool holder return, then it is discarded as vibration interference or chip interference; the height deviation after rejection is used to form the effective springback distance.

[0036] Furthermore, before the system is put into use, a product formula table, a clamping section physical configuration table, a shearing component configuration table, and a feeding condition parameter table are established. The product formula table is used to provide the strip unfolded width, web area coordinates, guide rail bearing area coordinates, bending line coordinates, mounting hole area coordinates, edge area width, edge curling area coordinates, and shearing station type. The clamping section physical configuration table is used to provide the clamping section number, starting coordinates, ending coordinates, center coordinates, corresponding actuator number, maximum clamping stroke, maximum allowable clamping force, clamping contact area, and clamping parameters. The adjustable range of the line; the shearing component configuration table is used to provide the shearing component type, upper shearing blade form, lower shearing blade position, shearing blade gap setting method, shearing blade tilt angle, first entry blade direction, tool holder stroke signal source, and shearing cycle signal source; the feeding condition parameter table is used to provide the feeding rate, pre-shearing positioning holding time, feeding stop signal, shearing cycle, tool holder return sampling delay, and post-shearing discharge allowance time; the feeding rate is not used as the basis for dividing the functional pressing section, but is used to determine the positioning stabilization time, pre-pressing advance, shearing cycle, and status sampling window.

[0037] Furthermore, the clamping compensation coordination module uses the effective springback amount obtained from the previous shearing cycle of the same specification strip steel for the clamping offset correction in the next shearing cycle; the clamping offset correction is still constrained by the functional clamping section, clamping line offset, upper limit of clamping compensation amount, the bearing capacity of the transition compensation section, and the difference in clamping compensation amount between adjacent sections; the clamping offset correction does not change the basic rules that the sensitive pressure limiting section and the edge slow release section do not directly apply strong pressure, the excess compensation amount is borne by the transition compensation section, and the difference in clamping compensation amount between adjacent clamping sections is limited by the local springback mutation amount.

[0038] The technical effects and advantages of this invention are as follows:

[0039] This invention maps the unfolded functional zone of the cold-formed photovoltaic support profile into different clamping sections of the end-face springback release zone, enabling the reference holding section, sensitive pressure limiting section, edge slow-release section, and transition compensation section to form corresponding clamping behaviors. Through the non-equidistant clamping line configuration, it achieves near-line constraint in the reference area, pressure limiting protection in the vicinity of the hole strip and bending line, and slow-release in the edge area. When the clamping compensation demand of the sensitive pressure limiting section or the edge slow-release section exceeds the upper limit, the transition compensation section takes over the compensation amount, and limits the difference in clamping compensation amount between adjacent sections based on the local springback mutation amount. Simultaneously, it matches the pre-compression, locking, and slow-release sequence with the shear blade entry phase. Therefore, while maintaining the stability of the web area, guide rail bearing area, or the reference edge end face of the joint, it reduces the risks of hole edge collapse, bending line indentation, edge corner collapse, secondary fold lines at the boundary of zones, and overpressure in the first breakage zone and underpressure in the subsequent breakage zone. Attached Figure Description

[0040] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts:

[0041] Figure 1 This is a schematic diagram of the structure of the photovoltaic support strip steel shear end face springback segmented clamping compensation system of the present invention;

[0042] Figure 2 This is a schematic diagram of the compression compensation coordination process of the present invention;

[0043] Figure 3 This is a schematic diagram of the pre-compression, locking, and slow-release timing of each compression section in Example 1;

[0044] Figure 4 This is a schematic diagram showing the relationship between the relative amount of clamping force and the amount of springback before and after compensation in Example 1. Detailed Implementation

[0045] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0046] This embodiment provides a segmented clamping compensation system for the springback of the sheared end face of photovoltaic bracket strip. This system is applicable to the shearing station during the production of cold-bent photovoltaic bracket components, when the photovoltaic bracket strip is still in a flat state. The shearing station can be a head-end trimming shearing station after the steel coil is uncoiled and put on the production line, a flush shearing station before the tail end of the previous coil and the head end of the next coil are joined, a shearing station for preparing the front face of the joining welding, a pre-cutting shearing station before entering the roll forming machine, or a shearing station for removing abnormal sections before forming.

[0047] In existing shearing machines or strip shearing devices, the clamping seat, clamping block, pressure plate, pressure head, support block, hydraulic cylinder, clamping spring, upper shearing blade, lower shearing blade, blade holder, and material support structure are all commonly used structures. For example, prior art CN206373420U discloses a main clamping seat, clamping spring, main upper blade, auxiliary clamping seat, and auxiliary shearing hydraulic cylinder, in which the clamping seat first clamps the sheet material and then the upper blade shears it. Prior art CN201543894U also describes in the background art that when heavy-duty hydraulic shears are used to cut the head and tail of thicker aluminum plates, the sheet material is clamped by several cylinder clamping devices set on the upper blade holder. Traditional cylinder clamping devices generally consist of several cylinders, each with a pressure head, which presses against the surface of the strip material under gas pressure. The number of pressure heads pressing against the strip material surface varies depending on the width of the strip material. Therefore, it can be seen that in strip shearing equipment, setting multiple pressure heads, multiple clamping blocks, or multiple support components to clamp or support the strip is an existing shearing and clamping structure. This invention, based on the existing clamping and shearing structure, establishes a segmented clamping compensation relationship to address the functional area differences of the springback release zone on the shearing end face of the photovoltaic bracket strip, and configures different clamping sections with clamping line offset, upper limit of pressure, transition compensation, and adjacent section compensation difference restrictions.

[0048] The photovoltaic support strip in this embodiment can be continuous hot-dip galvanized steel strip, zinc-aluminum-magnesium coated steel strip, aluminized zinc steel strip, or other corrosion-resistant coated structural steel strip. S340GD+ZM, S350GD+ZM, or equivalent zinc-aluminum-magnesium coated steel strip is preferred. Strip unfolded width The dimensions are determined based on the unfolded dimensions of the cold-formed profile for the subsequent photovoltaic support. In this embodiment, the end-cutting station before coil splicing is... This section describes the pre-cutting station before forming of 300mm S350GD+ZM zinc-aluminum-magnesium coated steel strip. This description pertains to 240mm S340GD+ZM coated steel strip. For other specifications of photovoltaic bracket rails, purlins, beams, or column profiles, the functional belt mapping module should be applied according to the actual unfolded width specified in the product formulation. The functional types of each pressing section are redefined based on the coordinates of the bending line, mounting hole, guide rail bearing area, rolled edge area, and edge area width.

[0049] In this embodiment, the photovoltaic support strip can be continuous hot-dip galvanized steel strip, zinc-aluminum-magnesium coated steel strip, aluminized zinc steel strip, or other corrosion-resistant coated structural steel strip. S340GD+ZM, S350GD+ZM, or equivalent zinc-aluminum-magnesium coated steel strip are preferred. (Strip unfolded width...) The thickness of the strip steel is determined based on the unfolded dimensions of the cold-formed profile for the subsequent photovoltaic support. For photovoltaic support rails, purlins, beams, or column profiles, the functional band mapping modules shall be installed according to the actual unfolded width specified in the product formulation. The functional type of each clamping section is determined by the coordinates of the bending line, mounting hole, guide rail bearing area, rolled edge area, and edge width. The clamping compensation coordination component configures the clamping line offset, clamping compensation limit, and pre-compression, locking, and release sequence of each clamping section according to the functional type. For ease of explanation, the unfolded width is selected. 300mm thick A set of 2.0mm S350GD+ZM zinc-aluminum-magnesium coated steel strips is used as the configuration object, and the unfolded width can also be selected. 240mm thick Another configuration is 1.8mm S340GD+ZM coated steel strip.

[0050] In this embodiment The direction is the direction of strip steel feeding. The direction is the shear line direction, which is also the direction of the strip's unfolded width. The direction is the direction of pressing and the direction of movement of the shearing assembly. The strip thickness is denoted as... The product length formed along the feeding direction is denoted as... Multiple clamping sections along Arranged in the direction of, and along The springback release band acts on the end face. The end face springback release band refers to the band that is close to the shear line and along... A narrow band extending outwards. This area is prone to residual stress release, localized springback, edge collapse, burr flanging, or indentation during shear blade entry, plastic shearing, fracture separation, and unloading.

[0051] like Figure 1As shown, this system includes a shearing module, a segmented clamping module, a functional strip mapping module, a status acquisition module, and a clamping compensation coordination module. The shearing module includes a shearing operating table and a shearing assembly. The shearing operating table is used to support and position the strip steel for the photovoltaic support, and the shearing assembly is used to shear the strip steel along the shearing line. The segmented clamping module includes multiple clamping sections arranged along the shearing line and acting on the end-face springback release strip. The functional strip mapping module outputs the functional clamping section type based on the subsequent unfolding functional strip information of the cold-formed profile. The status acquisition module acquires the effective springback distance of the end-face springback release strip, the clamping displacement, or the shearing entry phase. The clamping compensation coordination module generates a compensation output based on the above inputs and applies the compensation output to the segmented clamping module.

[0052] The shearing table includes a support surface, strip guides, end positioning components, and a support surface adjacent to the shearing line. The support surface is used to support the photovoltaic support strip in a flat state. The strip guides are positioned along... The guide can be configured using lateral guide rollers, guide flanges, adjustable guide blocks, or strip edge limiting components to restrict the strip's movement. The offset in direction. The end positioning element is used to determine the orientation of the strip's end face to be sheared. The shearing line is positioned so that the sheared end face can serve as a reference end face for strip welding, continuous feeding, punching positioning, or roll forming. The shearing line is located near the support surface near the lower shearing blade to support the end face springback release zone, reducing additional warping of the strip due to local suspension during shearing.

[0053] In one embodiment, a wear-resistant support strip is provided on the bearing platform near the shearing line. The upper surface of the wear-resistant support strip is flush with the support surface adjacent to the lower shearing blade. The strip guide cooperates with the end positioning member to keep the strip end face in place when it enters the shearing station. To the benchmark and Positioning. For pre-cutting before joining strips, end positioning components are used to position the tail end of the previous strip and the head end of the next strip, so that they form mating end faces after cutting. For pre-cutting before forming, end positioning components can be used in conjunction with a feeding length measuring device to ensure that the cutting position corresponds to the length of the subsequent support component or the process rejection position.

[0054] The shearing workbench can be a welded steel structure workbench, with an effective load-bearing width greater than the unfolded width of the corresponding strip steel. And reserve installation space for steel strip guides, end positioning, and segmented clamping mechanisms. In a configuration with a diameter of 300mm, the effective load-bearing width of the worktable can be no less than 350mm. The load-bearing table surface can be formed by welding and machining Q235B or Q355B steel plates, and the flatness of the table surface can be controlled within 0.10mm-300mm. Replaceable wear-resistant support strips are installed near the support surface of the shearing line. The support strips can be made of Cr12MoV, 9CrSi, or 40Cr surface-hardened hard materials, with a width of 20mm to 35mm and a thickness of 8mm to 15mm. Their upper surface is basically flush with the support surface adjacent to the lower shearing blade. The strip guide can use adjustable guide flanges in conjunction with small-diameter guide rollers. The diameter of the guide rollers can be... 20mm to 30mm; the end positioning component can be a pneumatic positioning pin, a mechanical stop block, or a servo stop block, wherein the diameter of the positioning pin can be [missing information]. 12mm to 20mm, with repeatability error controlled within 0.05mm.

[0055] The shearing assembly includes a frame, a lower blade holder, a lower shearing blade, a blade holder, an upper shearing blade, and a drive unit. The lower blade holder is fixed to the frame. The lower shearing blade is mounted on the lower blade holder. The upper shearing blade is mounted on the blade holder; the drive unit drives the blade holder along... The shearing mechanism is either driven by a directional motion or a oscillating motion of the blade holder, causing the upper and lower shearing blades to engage in shearing the strip steel used for photovoltaic supports. The driving component can be a hydraulic cylinder, servo cylinder, crank-connecting rod drive, or oscillating drive. The shearing assembly is preferably a bevel shearing assembly or an oscillating shearing assembly, causing the shearing blades to move along... There are a first-entry edge side and a second-entry edge side. Straight-blade synchronous shearing can be used as an optional implementation; in the straight-blade synchronous shearing state, the shearing entry phase of each clamping section can degenerate into a synchronous phase.

[0056] The shearing assembly configuration table describes the basic structure of the shearing assembly and the source of the shearing phase. It includes at least the shearing assembly type, upper shearing blade type, lower shearing blade position, shearing blade gap setting method, shearing blade inclination angle, first-entry blade direction, tool holder stroke range, tool holder stroke signal source, and shearing cycle signal source. The shearing blade gap, shearing blade inclination angle, and tool holder stroke are determined based on the strip thickness, material strength, coating condition, and the results of the first test cut. If the equipment cannot directly output the shearing blade inclination angle, it is obtained from the shearing assembly debugging parameters or the first-piece shearing sequence calibration.

[0057] The shearing assembly can employ hydraulic shears, servo shears, or other shearing structures suitable for fixed-length strip shearing. The upper and lower shearing blades can be made of 9CrSi, Cr12MoV, or equivalent wear-resistant alloy tool steel inserts, and the effective shearing length of the shearing blades is not less than the current unfolded width of the strip. .exist In a 300mm configuration, the effective shearing length of the upper and lower shearing blades can range from 360mm to 420mm. The upper shearing blade is mounted on the tool holder, which is driven by a hydraulic cylinder, servo electric cylinder, or crank-connecting rod mechanism. When using hydraulic drive, the shearing hydraulic cylinder can be selected with a cylinder diameter... 50mm to Double-acting hydraulic cylinders with a diameter of 80mm and a stroke of 40mm to 80mm are available, with rated working pressures ranging from 8MPa to 16MPa. When using servo electric cylinders, those with a rated thrust of 20kN to 50kN and an effective stroke of 50mm to 100mm can be selected. The shearing blade clearance is set according to the strip thickness and material strength. For zinc-aluminum-magnesium coated strips with a thickness of 1.5mm to 3.0mm, the single-sided shearing blade clearance can be set to 5% to 10% of the strip thickness h.

[0058] In oblique shearing or oscillating shearing conditions, the shearing edge... The cutting edge gradually enters the strip. The side that enters first experiences shear blade contact, plastic shearing, fracture separation, and unloading, while the side that enters later may still be under shear constraint at the same time. If all clamping sections simultaneously enter the maximum clamping state and release pressure at the same time, the side that enters first is prone to continue to be excessively clamped after shearing, while the side that enters later may not be sufficiently constrained before actual fracture. Therefore, in this embodiment, the shear entry phase is obtained through the state acquisition module, and the pre-compression, locking, and slow release sequence is configured by the clamping compensation coordination module according to the entry sequence.

[0059] The segmented clamping module is located in the area adjacent to the shear line and includes a section along... Multiple clamping sections are arranged sequentially. Each clamping section is along... A clamping action is applied to the rebound release band at the opposite end face. The clamping section may include a clamping block, clamping shoe, clamping beam section, clamping pad block, or clamping roller section. Each clamping section may be driven by a hydraulic actuator, pneumatic actuator, servo electric cylinder, electromagnetic actuator, or elastic preload active adjustment component. The type of actuator is not a necessary limitation of this invention, as long as it enables the corresponding clamping section to form an adjustable clamping displacement, clamping force, or clamping holding sequence.

[0060] Each clamping segment in the segmented clamping module may include a clamping block and a drive clamping block along... The clamping actuator moves towards the strip. The clamping block forms a clamping contact surface on the side closest to the strip. The clamping contact surface can be a flat surface, a slightly curved surface, or a flat surface with a chamfer. A chamfer or rounded corner can be provided on the side closest to the shear line to reduce the risk of coating scratches, burr interference, and near-edge indentation.

[0061] Expand width In a 300mm configuration, eleven clamping sections can be set, with each clamping section arranged sequentially along the unfolded width of the strip; within the unfolded width... In a 240mm configuration, the number of clamping sections can be reduced or the coverage width of a single clamping section can be decreased, while maintaining the functional configuration relationship between the reference holding section, sensitive pressure limiting section, edge release section, and transition compensation section. The coverage width of a single clamping section is determined based on the boundary of the corresponding functional band. The coverage width of the edge release section can be approximately 20mm, the coverage width of the bending line pressure limiting section can be approximately 25mm, and the reference holding section and the hole band pressure limiting section can be configured at approximately 30mm.

[0062] The clamping block can be made of 40Cr tempered steel, Cr12MoV, or a clamping seat with replaceable wear-resistant pads. The effective contact width of the clamping contact surface in the feeding direction can be 8mm to 18mm. The clamping contact surface of the reference holding section can be a flat surface or a small chamfered surface, with a chamfer of 0.2mm to 0.8mm. The clamping contact surfaces of the hole pressure limiting section, the bending line pressure limiting section, and the edge slow-release section can be micro-arc surfaces, or flat surfaces with a radius of R0.5mm to R1.5mm, to reduce the risk of hole edge collapse, bending line indentation, and plating damage. The clamping actuator can be a short-stroke hydraulic cylinder, a pneumatic-hydraulic booster cylinder, a thin-film pneumatic cylinder, a servo electric cylinder, or a spring preloaded active adjustment component. Taking pneumatic or pneumatic-hydraulic actuation as an example, the reference holding section can be configured with a cylinder diameter... 32mm to A clamping cylinder with a diameter of 40mm and a stroke of 20mm to 30mm; the cylinder diameter can be configured with a pressure limiting section with a bend line, a pressure limiting section with a side release section. 25mm to A clamping cylinder with a diameter of 32mm and a stroke of 20mm to 25mm is used. When using a servo electric cylinder, a small electric cylinder with a rated thrust of 0.5kN to 2kN and a stroke of 20mm to 30mm can be configured. Each clamping actuator can be equipped with a magnetic switch, a linear displacement sensor, or a pressure sensor, wherein the displacement detection range can be 0mm to 30mm, and the resolution is not less than 0.01mm; the pressure detection device can be a pneumatic pressure sensor of 0MPa to 1.0MPa or a hydraulic pressure sensor of 0MPa to 10MPa.

[0063] Furthermore, the effective contact area is defined as the region where the clamping contact surface actually forms stable contact with the end face springback release band. For the reference holding section, the clamping contact surface can be a flat plane or a small chamfered plane. The chamfer on the side near the shear line is mainly used to avoid shear burrs and chips, so that this section forms a stable narrow band clamping at a position closer to the shear line. For the hole-band pressure-limiting section, the bending line pressure-limiting section, and the edge slow-release section, the clamping contact surface can be a micro-arc surface, a flat plane with rounded corner transitions, or a flat plane equipped with replaceable wear-resistant pads, so that the clamping load forms a gentler transition along the feeding direction, avoiding the formation of sharp indentations at the edge of the mounting hole, the vicinity of the bending line, or the edge of the strip. The clamping contact surface of the transition compensation section can adopt a contact width and rounded corner transition between the reference holding section and the adjacent sensitive pressure-limiting section, to match the continuous transition of its clamping line offset, upper limit of clamping compensation amount, and slow-release slope.

[0064] For zinc-aluminum-magnesium coated steel strips with a thickness h of 1.5mm to 3.0mm, the chamfer on the side of the clamping contact surface near the shear line in the reference holding section can be 0.2mm to 0.8mm, and the fillet radius of the contact edge in the hole-limiting pressure section, the bending line-limiting pressure section, and the edge relief section can be 0.5mm to 1.5mm. The working surface of the clamping contact surface in contact with the steel strip coating should not have sharp corners, protrusions, or transverse grooves. If improved wear resistance is required, surface-hardened steel, replaceable wear-resistant pads, or polished clamping pads can be used. After the first test cut, if continuous indentations, a bright band in the coating, or edge damage are detected in the sensitive pressure-limiting section, the wear condition, effective contact width, and clamping line offset of that section's clamping contact surface should be checked first, and then the upper limit of the corresponding clamping compensation amount should be adjusted.

[0065] The physical configuration table for the clamping sections describes the actual arrangement of the segmented clamping modules. It includes at least the clamping section number, the starting coordinates, ending coordinates, center coordinates, corresponding actuator number, maximum clamping stroke, maximum allowable clamping force, clamping contact area, adjustable clamping line range, and corresponding clamping block specifications. The coverage width of the clamping section along the shear line is determined by the clamping block width, the clamping beam segment width, or the spacing between clamping actuators. If the width of a subsequent cold-bending functional zone is greater than the allowable coverage width of a single clamping actuator, that functional zone can be divided into multiple clamping sections, but the multiple clamping sections after division will still perform clamping according to the same functional clamping section type.

[0066] No. The equivalent bearing area of ​​each compression section is determined by the compression section along... The coverage width and pressing contact surface in the direction The effective contact width is determined along the clamping section. The coverage width is the span of the clamping section in the direction of the strip's unfolded width. The clamping contact surface is in... The effective contact width is determined based on the clamping line offset, the contact shape of the clamping block, and the space adjacent to the shearing line. The clamping line offset can be achieved through an adjustable slide, multiple rows of mounting holes, interchangeable clamping blocks, offset clamping pads, or multi-contact edge clamping elements. With the above structure, those skilled in the art can create different clamping line offsets in different clamping sections without changing the main structure of the shearing assembly.

[0067] Multiple clamping sections perform different clamping behaviors based on the functional clamping section type output by the functional strip mapping module. The reference holding section corresponds to the web area, guide rail bearing area, or reference edge of the subsequent cold-formed profile. The sensitive pressure limiting section corresponds to the mounting hole strip, pre-punched hole neighborhood, oblong hole neighborhood, connecting hole neighborhood, or bending line neighborhood. The edge relief section corresponds to the strip edge, rolled edge area, or subsequent edge forming area. The transition compensation section is located between different functional clamping sections and is used to accommodate changes in clamping compensation amount, clamping line offset, and springback release state.

[0068] Before the system is put into use, establish a product formula table, a pressing section physical configuration table, a shearing component configuration table, a feeding condition parameter table, and a first-piece trial cut parameter table. The product formula table is used to provide information on the unfolded functional strip of the current photovoltaic bracket cold-formed profile, including at least the unfolded width of the strip. The parameters include: web area coordinates, guide rail bearing area coordinates, bending line coordinates, mounting hole area coordinates, edge area width, edge curling area coordinates, and shearing station type. For profiles without mounting holes, the mounting hole area coordinates can be empty. For profiles without a clear guide rail bearing area, the web area coordinates serve as the mapping basis for the reference holding section. The feeding condition parameter table describes the operating status of the strip entering the shearing station, including at least the feeding rate, pre-shear positioning holding time, feeding stop signal, shearing cycle, tool holder return sampling delay, and post-shear discharge allowable time.

[0069] The feed rate is not used as a basis for classifying functional clamping sections, nor does it change the configuration results of the functional strip mapping module for each clamping section's functional type. The feed rate is used to determine the positioning stabilization time, pre-compression advance, shearing cycle, and state sampling window after the strip enters the shearing table. For the strip-jointing end-cutting station, the strip stops or enters the positioning state at low speed before shearing; pre-compression and shearing are performed after the end positioning components complete positioning. For the pre-cutting station before forming, the feeding mechanism feeds according to the product's fixed length. Before feeding and shearing, the material enters a positioning and holding state. If the feeding rate is high and residual vibration exists on the shearing front face, the state acquisition module extends the stable sampling window after positioning, or the clamping compensation coordination module increases the pre-compression advance of the reference holding section. However, the sensitive pressure limiting section and the edge slow-release section are still limited by their upper limit of clamping compensation.

[0070] The functional strip mapping module reads the unfolded functional strip information of the current photovoltaic bracket cold-formed profile. This unfolded functional strip information can be provided by the product formula, punching program, profile cross-section unfolding data, or operator input. The functional strip mapping module maps the aforementioned unfolded functional strip information along... Multiple clamping sections are mapped to the end face springback release band.

[0071] The functional band mapping module configures the functional clamping section types in the following order. First, it determines the mandatory protection boundary based on the mounting hole band, pre-punched hole neighborhood, bend line neighborhood, edge area, and rolled edge area, and configures the corresponding clamping section as a sensitive pressure-limiting section or an edge-releasing section. The mounting hole band, pre-punched hole neighborhood, and bend line neighborhood correspond to sensitive pressure-limiting sections. The edge area and rolled edge area correspond to edge-releasing sections. The above mandatory protection boundary takes precedence over the ordinary equidistant segmentation rule.

[0072] Secondly, the clamping sections corresponding to the web area, guide rail bearing area, or connecting strip reference edge are configured as reference holding sections. For web areas or guide rail bearing areas whose width exceeds the allowable coverage width of a single clamping actuator, the functional strip mapping module splits them into multiple reference holding sections. The multiple clamping sections after splitting are still configured with clamping line offset, clamping compensation upper limit, and locking timing according to the reference holding sections.

[0073] Furthermore, transition compensation sections are configured between the reference holding section and the sensitive pressure limiting section, between the reference holding section and the edge slow-release section, or between two different sensitive pressure limiting sections. The transition compensation section can be an independent clamping section or a transition compensation execution group composed of adjacent clamping sections. When there is no independent physical clamping section between two functional sections, the clamping compensation coordination module sets the adjacent clamping sections near the boundary as the transition compensation execution group, and achieves the transition compensation function through continuous changes in clamping line offset, upper limit of clamping compensation amount, and slow-release slope.

[0074] When a clamping section simultaneously covers multiple unfolding functional zones, the functional zone mapping module determines the functional type of the clamping section in the following order: mounting hole zone or pre-punched hole neighborhood, bending line neighborhood, edge area or rolled edge area, web area or guide rail bearing area, and ordinary area. If two forced protection functional zones are adjacent, a transition compensation section is configured between them, or adjacent clamping sections are set as a transition compensation execution group. In this way, the functional areas of subsequent cold-formed profiles are physically mapped to the end face springback release zone of the current shearing station.

[0075] See Figure 1 and Figure 2 The reference holding section, sensitive pressure limiting section, edge slow release section and transition compensation section output by the functional area mapping module are used to determine the pressure line offset, pressure compensation upper limit and pre-pressure, locking pressure and slow release sequence of each pressure section, so that the functional area mapping results are directly implemented into the segmented pressure action of the shearing station.

[0076] Sensitive pressure-limiting sections can include hole-band pressure-limiting sections and bending-line pressure-limiting sections. Hole-band pressure-limiting sections correspond to the area adjacent to mounting holes, oblong holes, connecting holes, pre-punched holes, or areas where the hole edge is close to the shear line. In this area, the local cross-section is weakened, and strong pressure can easily cause hole edge collapse, hole spacing fluctuations, or plating damage. Bending-line pressure-limiting sections correspond to the area adjacent to the bending line in subsequent cold bending forming. This area requires subsequent plastic bending, and shear indentations or local hardening can affect the forming stability after bending. Both hole-band pressure-limiting sections and bending-line pressure-limiting sections are sensitive pressure-limiting sections, but the upper limit of the clamping compensation, clamping line offset, and release sequence can be specified separately. Hole-band pressure-limiting sections and bending-line pressure-limiting sections are generally not considered priority compensation sections. Only when there is no remaining compensation capacity in the adjacent transition compensation section and the reference holding section is it allowed to undertake a low proportion of compensation within its own upper limit of clamping compensation.

[0077] The status acquisition module is used to acquire at least one of the following: effective springback distance of the end face springback release band, clamping displacement, or shear entry phase. The status acquisition module may include an end face height detection component, a clamping displacement detection component, a tool holder stroke detection component, a shearing cycle signal acquisition component, and a product formula reading unit.

[0078] The end face height detection component is used to obtain the end face springback release band edge. Height deviation at corresponding positions of different clamping sections. The end face height detection device can be a displacement sensor, laser rangefinder, line laser profile sensor, contact probe, or other detection device capable of acquiring the end face height. Effective springback distance is the height deviation that reflects the true springback state of the end face after removing burr peaks, chip interference, and instantaneous vibration.

[0079] The clamping displacement detection device is used to acquire the actual clamping stroke, return displacement, or feedback displacement of the clamping actuator for each clamping section. The clamping displacement can be used to determine whether the clamping section has reached the set clamping state, and also to determine whether insufficient clamping, excessive clamping, or controlled release has occurred in the corresponding area. The tool holder stroke detection device or shearing cycle signal acquisition device is used to acquire the upper shearing blade position, tool holder movement stage, shearing start time, blade entry time, shearing completion time, and return time. The shearing entry phase is determined by the shearing blade entry direction, shearing blade inclination angle, tool holder stroke signal, and the center coordinates of the clamping section. If the equipment cannot directly output the shearing blade inclination angle, it is obtained from the shearing assembly debugging parameters or the first piece shearing sequence calibration.

[0080] The status acquisition module acquires end-face height data after shearing is completed and a short delay has elapsed. This short delay is used to avoid the stage of maximum shearing impact. Multiple height points can be collected at the corresponding position of each clamping section. If a certain height point is significantly higher than the adjacent height points, and the width of the height point is less than the preset burr width, then the height point is discarded as a burr peak. If the height data of the same clamping section is inconsistent with the clamping displacement feedback, or is consistent with the vibration frequency of the tool holder return, then it is discarded as vibration interference or chip interference. The height deviation obtained after the above processing is used as the effective springback distance.

[0081] The status acquisition module can also determine the local springback mutation amount based on the difference in the effective springback clearance between adjacent clamping sections. The local springback mutation amount is used to characterize whether there is a sudden change in the springback state between a certain clamping section and its adjacent clamping sections. The larger the local springback mutation amount, the more likely that a secondary broken line, local ripples, or stepped end face will form at that location. The local springback mutation amount can be determined based on the change in the effective springback clearance between three adjacent clamping sections, or it can be determined from the clamping displacement difference before the current shearing, the end face height data of the previous shearing cycle, the first piece test cut data, or the calibration data of strip steel of the same specification.

[0082] The clamping compensation coordination module configures the clamping line offset for each clamping segment based on the functional clamping segment type and status acquisition results. The clamping line offset refers to the offset of the clamping contact line relative to the shear line of the clamping segment. The distance upwards. (Number) The offset of the clamping line of each clamping section is denoted as... And determine it according to the following formula.

[0083] ,

[0084] in, This is the minimum safe offset between the clamping section and the shear line. For strip thickness, The basic offset coefficient corresponding to the functional clamping section type, This is the local sensitivity correction coefficient. It is determined by the steel coil material information, production formula, or online thickness measurement results. It is determined by the shear blade gap, the chamfer of the clamping block, the clearance of the blade holder, and the space reserved for burrs. By the The function and type of each clamping section are determined. It is determined by the hole edge distance, bending line distance, or edge distance of the corresponding area of ​​the pressing section.

[0085] In one implementation, the reference holding segment Take 1.0. The pressure-limiting section with the orifice, the pressure-limiting section with the bend, and the edge slow-release section. Greater than 1.0. The transitional compensation phase. Take the transition value between adjacent functional sections. When the distance from the hole edge to the shear line is less than 6h, the pressure-limiting section of the hole band... A value of 1.15 to 1.45 can be taken. When the distance from the hole edge to the shear line is less than 3h, the pressure-limiting section of the hole... A value of 1.35 to 1.70 can be taken. When the distance from the center of the bending line to the shear line is less than 8h, the pressure-limiting section of the bending line... A value of 1.10 to 1.35 can be used. When the center distance of the clamping section from the edge of the strip is less than 20 mm, the edge release section... A value of 1.15 to 1.40 is acceptable.

[0086] Reference holding segment A smaller value brings the clamping line closer to the shear line, improving the stability of the web area, the guide rail bearing area, or the corresponding end face of the reference edge of the connecting strip. This applies to the sensitive pressure-limiting section and the edge slow-release section. A larger value keeps the clamping line away from the shear line, reducing the risk of near-edge pressure on the mounting hole area, bend line neighborhood, and edge areas. The clamping line offset of the transition compensation section lies between adjacent functional clamping sections and varies continuously along the shear line direction.

[0087] In one embodiment, when the strip thickness is 1.5 mm to 3.0 mm, the base offset coefficient of the reference holding section is... A value of 0.8 to 1.4 is acceptable. This is the baseline offset coefficient for the sensitive pressure-limiting section. A value of 1.4 to 3.2 is acceptable. This is the baseline offset coefficient for the edge-released section. A value of 1.8 to 3.0 is acceptable. The variation in the offset of the clamping line between adjacent clamping sections can be controlled to not exceed 0.4 to 0.6 times the strip thickness. This setting provides near-line constraint to the reference area, far-line protection to the perforated strip, bend line, and edge area, and creates a smooth transition in the transition compensation section.

[0088] The clamping compensation coordination module also configures an upper limit for the clamping compensation amount based on the functional clamping section type. The clamping compensation amount can be expressed as at least one of the following: clamping force increment, clamping displacement increment, holding time increment, or pressure relief slope adjustment amount, in addition to the basic clamping state. This embodiment describes the clamping force increment as a representative form of the clamping compensation amount.

[0089] No. The amount of clamping compensation performed by each clamping section is denoted as follows: The limiting relationship is as follows.

[0090] ,

[0091] in, For the first The upper limit of the clamping compensation amount of each clamping section. To maintain basic contact and retain the minimum required clamping force in this clamping section, The clamping compensation requirement for this clamping section is determined based on the foundation retention requirements, the effective springback distance, and the test cut calibration results.

[0092] No. Upper limit of clamping compensation for each clamping section Determine using the following formula.

[0093] ,

[0094] in, For the first The equivalent bearing area of ​​each compression section This is the basic allowable contact pressure for the corresponding functional type of the clamping section. This represents the local damage constraint coefficient. From the pressing section along Towards the coverage width and the pressing contact surface The effective contact width is determined. It is determined by the type of functional clamping section and the strip material. It is determined by the results of hole edge distance, bending line distance, edge distance, coating indentation inspection, and indentation depth calibration.

[0095] In one implementation, the reference holding segment A value of 0.85 to 1.0 is acceptable. (This refers to the pressure-limiting section of the orifice.) The distance is determined by the distance from the hole edge to the shear line; the smaller the hole edge distance, the better. The smaller the value; when the hole edge distance is less than 6h, A value of 0.45 to 0.70 is acceptable. (This refers to the pressure-limiting section of the bending line.) The value is determined based on the distance between the bending line and the shear line and the required bending radius, and can be taken as 0.55 to 0.80. (This refers to the edge slow-release section.) The distance from the center of the clamping section to the edge of the strip is determined and can be taken as 0.50 to 0.75. The transition compensation section... The transition value between adjacent functional segments can be taken, or it can be set to 0.70 to 0.90 according to the compensation task undertaken by each segment.

[0096] Reference holding segment Higher, used to maintain the stability of the end face reference. Sensitive pressure limiting section. Lower risk of edge collapse, bend line indentation, and plating damage. Edge-release section. The section remains below the baseline and allows for controlled release at the edges, less than a preset value. The transition compensation section... Located between adjacent functional compression sections, or configured according to its compensation task, it is capable of undertaking the compensation needs vacated by adjacent sensitive pressure limiting sections or edge slow-release sections.

[0097] The aforementioned limiting relationship indicates that even if the effective rebound distance of the sensitive pressure-limiting section or the edge slow-release section is large, the compression compensation coordination module will not directly exceed its compression compensation limit. Therefore, the sensitive pressure-limiting section and the edge slow-release section maintain pressure-limiting protection and controlled release even when the rebound trend increases.

[0098] Tighten compensation requirements The clamping compensation parameter table can be determined from the clamping compensation parameter table generated after the first test cut. This clamping compensation parameter table should include at least the basic holding amount, the upper limit of clamping compensation amount, the allowable controlled release amount, the compensation gain, the pre-compression advance amount, the locking pressure holding amount, and the slow release slope corresponding to each functional clamping section type. The effective springback deflection amount obtained by the status acquisition module is used to make a small offset correction to this parameter table.

[0099] During the first test cut, the clamping compensation coordination module first configures the clamping section function type according to the product formula, and then configures the basic clamping compensation requirements according to the function type. The basic retention amount of the reference holding section is higher than that of the sensitive pressure limiting section and the edge slow-release section. After the first piece is cut, the status acquisition module collects the effective springback off-surface amount, hole edge collapse, bending line indentation, edge collapse angle, and reference section end face off-surface deviation for each clamping section. If the effective springback off-surface amount of the reference holding section exceeds the target range, the clamping compensation of the reference holding section or the adjacent transition compensation section is increased. If the effective springback amount of the sensitive pressure-limiting section exceeds the target range, but there is a risk of hole edge collapse, bending line indentation, or coating damage in that section, then an over-limit compensation amount is generated and transitional compensation is initiated. If the height change of adjacent compression sections exceeds the target range, the effect of increasing the local springback change amount influence coefficient on limiting the compensation difference between adjacent sections is enhanced.

[0100] When the compression compensation requirement of the sensitive pressure-limiting section or the edge slow-release section exceeds its compression compensation limit, the compression compensation coordination module determines the excess compensation amount for that section. Excess compensation amount of each compression section Determine using the following formula.

[0101] like Figure 2 As shown, the compression compensation coordination module first generates the compression compensation requirements for each compression segment based on the status acquisition results and the functional compression segment type, and then determines whether the requirements exceed the corresponding compression compensation limit. If the limit is not exceeded, the compression segment performs compensation as per the limit; if the limit is exceeded, the excess portion forms an over-limit compensation amount, which is taken over by the adjacent transition compensation segment or transition compensation execution group. If the pressure difference limit of the adjacent segment cannot be met after taking over, it continues to spread to the second adjacent compression segment until the segmented compression parameters that meet the limit conditions are output.

[0102] ,

[0103] in, This refers to the compensation needs that cannot be directly borne by this section for the compaction section. It is allocated to a neighboring segment that can be compensated.

[0104] No. The effective residual compensation capacity of each compensable adjacent segment Determine using the following formula.

[0105] ,

[0106] in, For the first The upper limit of the amount of compensation for each adjacent section that can be compensated. For the first The current execution compression compensation amount of each compensable adjacent segment. For functional adaptation coefficients, This is the adjacency distance coefficient. The transition compensation segment... The pressure-limiting section is larger than the reference holding section. This includes the pressure-limiting section with the hole, the pressure-limiting section with the bend, and the edge slow-release section. The lowest, and in principle not a priority compensation segment. Adjacent compaction segments... The compensation is greater than the second adjacent clamping section. This setting prioritizes clamping sections with remaining compensation capacity, suitable functional types for receiving compensation, and close proximity to each other to receive excess compensation.

[0107] No. The compensation amount is adjusted after each subsidizable adjacent section accepts the excess compensation amount. Determine using the following formula.

[0108] ,

[0109] in, This is the sum of the effective remaining compensation capacity of each eligible adjacent segment participating in this allocation. If Insufficient to bear If the unreceived portion is converted into the permissible controlled release amount of the sensitive pressure limiting section or the edge slow-release section, an insufficient compensation warning will be output. The insufficient compensation warning is used for first-piece trial cutting correction, clamping line offset verification, shearing speed verification, shear blade gap verification, or clamping block contact surface inspection.

[0110] In this way, the areas adjacent to the mounting holes, bends, and edges will not be directly subjected to forced pressure due to significant local springback. Over-limit compensation requirements are borne by the transition compensation section or other compatible adjacent sections, thus protecting sensitive areas while maintaining the stability of the end face corresponding to the reference holding section. If an adjacent pressing section on one side is a bend line pressure-limiting section, a hole strip pressure-limiting section, or has reached its own maximum pressing compensation amount, the pressing compensation coordination module reduces the proportion of load on that side. If the other side is a transition compensation section or a reference holding section, and still has compensation margin, the load is preferentially distributed to that side.

[0111] The clamping compensation coordination module also limits the difference in clamping compensation between adjacent clamping sections based on the local springback mutation amount and the functional section boundary state. Local rebound mutation amount of each compression section Determine using the following formula.

[0112] ,

[0113] in, For the first The effective springback distance of each compression section This is the effective springback distance of the adjacent pressing section. The effective off-surface amount of springback for the next adjacent pressing section. To allow for deviations from the surface, the calibration value of the first test cut, or the historical stable value of strip steel of the same specification. , and The data is obtained by sampling after shearing by the status acquisition module and then removed by burr peaks, chip interference, and instantaneous vibration.

[0114] No. The difference in compensation between each clamping segment and the adjacent previous clamping segment satisfies the following formula.

[0115] ,

[0116] in, In order to be with the first The amount of clamping compensation performed by the previous clamping section adjacent to each clamping section. Based on the allowable pressure difference, The coefficient representing the influence of local rebound mutation amount. The functional boundary influence coefficient. This is a functional boundary correction term. , and It was obtained from the calibration of the first test cut. The function of adjacent clamping sections is determined based on their functional types. When adjacent clamping sections belong to different functional sections... Take 1. When adjacent pressing sections belong to the same reference holding section, Set to 0. When the adjacent relationship is between the reference holding section and the hole-band pressure-limiting section, the reference holding section and the bending line pressure-limiting section, the reference holding section and the edge slow-release section, or the sensitive pressure-limiting section and the edge slow-release section, It can be set to 1 or a calibration value greater than 1 based on the test cut results.

[0117] The larger the value, the more discontinuous the rebound release at that location, and the more likely it is to show secondary zigzag lines, local ripples, or stepped end faces. The larger the value, the more likely the location is at the boundary of different functional segments, and the greater the need to suppress abrupt changes in compensation. Therefore, The larger or The larger the value, the smaller the allowable difference in compensation between adjacent compression sections.

[0118] If the excess compensation amount of the sensitive pressure-limiting section or the edge slow-release section is allocated to the adjacent transition compensation section, causing the difference in compensation amount between adjacent compression sections to exceed the above limit, the compression compensation coordination module first reduces the sudden increase in compensation amount of the transition compensation section, and then diffuses it to the second adjacent transition compensation section. If the limit is still not met after diffusion, the compensation requirement of the corresponding area of ​​the sensitive pressure-limiting section or the edge slow-release section is reduced, and the area is marked as a controlled release state. This rule is used to avoid the segmented compression itself introducing new secondary broken lines, local ripples, or indentations at the junction of adjacent compression sections.

[0119] When the shearing assembly is a beveled shearing assembly or a swing-type shearing assembly, the clamping compensation coordination module configures the pre-compression, locking, and release sequence of each clamping section according to the shearing entry phase. The shearing entry phase can be determined based on the center position of the clamping section, the position of the first-entry edge side, the position of the last-entry edge side, the shearing blade angle, and the tool holder stroke. The clamping section corresponding to the first-entry edge side enters pre-compression earlier and enters low-amplitude holding or release earlier after shearing in the corresponding area. The reference holding section maintains stable locking pressure during shearing. The clamping section corresponding to the last-entry edge side enters locking pressure later and releases slowly after breaking in the corresponding area. The release sequence of the transition compensation section is later than that of the adjacent sensitive pressure limiting section or the edge release section, and is used to receive its controlled release.

[0120] like Figure 3 As shown, in the eleven clamping sections of Embodiment 1, the pre-compression start point, locking and holding stage, and slow-release stage of each clamping section are staggered sequentially from the first-entry edge side to the last-entry edge side. This timing matches the order of entry, breakage, and unloading of the corresponding areas of different clamping sections during the oblique blade shearing process, in order to reduce the problems of over-compression after shearing on the first-entry edge side and insufficient constraint before breakage on the last-entry edge side.

[0121] Pre-compression refers to the pre-compression before the shear blade actually cuts into the corresponding compression section. Locking pressure refers to maintaining a relatively stable compression state during the shear blade entry, plastic shearing, and fracture separation stages. Slow release refers to the compression effect of the compression section decreasing according to a preset slope after the corresponding area is sheared. The pre-compression of the compression section on the first-entry-edge side is earlier than a shearing preparation window before the shear blade contacts the section, and the locking pressure continues until the section is basically fractured. The edge slow release section and the sensitive pressure limiting section enter a smooth slow release after fracture. The reference holding section is maintained until the adjacent transition compensation section completes its take-over before slow release. The locking pressure of the compression section on the rear-entry-edge side starts later than that on the first-entry-edge side, but its release is later than that on the first-entry-edge side. The slow release time of the transition compensation section can be later than that of the adjacent sensitive pressure limiting section or the edge slow release section to take over its controlled release. During straight-edge synchronous shearing, the above-mentioned entry phase degenerates into synchronous pre-compression, synchronous locking pressure, and synchronous slow release, but still retains the functional band mapping, compression line offset, sensitive pressure limiting, and transition compensation rules.

[0122] Through the above relationships, the functional strip mapping module maps the unfolded functional strip entity of the subsequent cold-formed profile to the functional clamping section type of the current shearing station. The status acquisition module converts the end face springback release state into the effective springback distance and local springback mutation amount. The clamping compensation coordination module determines the clamping compensation execution state of each clamping section based on the functional clamping section type, clamping line offset, upper limit of clamping compensation amount, over-limit compensation amount, remaining capacity of the compensable adjacent section, pressure difference limit of adjacent section, and shearing entry phase. Sensitive pressure limiting sections and edge slow-release sections are not directly forced due to the increasing springback trend; the over-limit compensation amount is taken over by the transition compensation section or the compensable adjacent section. The compensation amount difference between adjacent clamping sections is limited by both the local springback mutation amount and the functional boundary state. The pre-compression, locking, and slow-release of each clamping section are matched with the fracture sequence of the oblique blade or swing shear.

[0123] During one operation at the strip shearing station, the feeding mechanism delivers the tail end of the previous strip to the shearing table. The feeding rate decreases before entering the positioning zone. After the end positioning component determines the shearing line position, the feeding mechanism stops and maintains the position. The status acquisition module confirms that the strip end face is within the allowable positioning error range. The functional strip mapping module reads the product formula and configures each clamping section as a reference holding section, a sensitive pressure limiting section, an edge release section, and a transition compensation section. The clamping compensation coordination module sets the clamping line offset, the upper limit of clamping compensation, and the pre-compression sequence according to the clamping section physical configuration table and the station parameter table. The segmented clamping module first enters the pre-compression stage, and the shearing assembly then performs the oblique blade shearing. After shearing, each clamping section enters the locking and release stage according to the blade entry phase and the functional clamping section type. The status acquisition module acquires the end face height data in the sampling window after the blade return and removes burr peaks and vibration interference. The clamping compensation coordination module uses the effective springback offset amount for the offset correction of the next shearing of the same specification.

[0124] During one operation at the pre-cutting station before molding, the feeding mechanism follows the product's fixed length. The conveyor belt is fed at a rate determined by the feeding servo system based on the pre-rolling cycle time and positioning accuracy. After the strip enters the shearing table, the end positioning component or the feeding servo positioning signal confirms the cutting position. Since the sheared end face at this station will enter subsequent roll forming, the functional belt mapping module prioritizes identifying the web area, the bend line neighborhood, and the edge curling area. The web area corresponds to the reference holding section, the bend line neighborhood corresponds to the sensitive pressure limiting section, and the edge curling area corresponds to the edge slow-release section. If the pre-punched hole edge is close to the shearing line, the corresponding clamping section enters the hole-belt pressure limiting state. The clamping compensation coordination module performs pre-compression before shearing, maintains the reference holding section under pressure during shearing, and smoothly releases the edge slow-release section and the sensitive pressure limiting section after shearing. This process maintains the end face reference before entering the roll press while reducing the risk of bend line indentations and edge collapse.

[0125] Example 1

[0126] This embodiment describes the shearing station before coil splicing. The strip material is S350GD+ZM zinc-aluminum-magnesium coated steel strip, and the strip thickness is... It is 2.0mm wide. The strip is 300mm long. This strip is used for subsequent cold bending to form the Ω-shaped guide rail profile of the photovoltaic bracket. Other beam profiles or Z-shaped bracket profiles can be configured separately according to their corresponding unfolded dimensions. The shearing assembly is a diagonal blade shearing assembly, used to perform clean cuts on the tail end of the previous coil and the head end of the next coil. The cut end faces are used for splicing welding and continuous feeding.

[0127] The unfolding function of the current product formulation is along the edge The following settings apply: 0mm to 20mm is the edge or rolled edge area; 20mm to 45mm is the bend line area and flange transition area; 45mm to 135mm is the first reference zone of the web; 135mm to 165mm is the mounting hole area or pre-punched hole area; 165mm to 255mm is the second reference zone of the web or guide rail bearing area; 255mm to 280mm is the bend line area and flange transition area; and 280mm to 300mm is the edge or rolled edge area.

[0128] Segmented clamping module along Eleven compression sections are set. The functional band mapping module first processes the forced protection boundary, configuring the corresponding areas from 0mm to 20mm and 280mm to 300mm as edge relief sections, the corresponding areas from 20mm to 45mm and 255mm to 280mm as bend line pressure-limiting sections in the sensitive pressure-limiting sections, and the corresponding area from 135mm to 165mm as hole band pressure-limiting sections in the sensitive pressure-limiting sections. Subsequently, the corresponding areas from 45mm to 135mm and 165mm to 255mm are configured as reference holding sections. Finally, transition compensation sections or transition compensation execution groups are configured at the junctions of the edge relief sections, sensitive pressure-limiting sections, and reference holding sections.

[0129] In this embodiment, the first clamping section corresponds to 0mm to 20mm and is configured as an edge-releasing section. The second clamping section corresponds to 20mm to 45mm and is configured as a bending line pressure-limiting section. The third to fifth clamping sections correspond to 45mm to 135mm and are configured as reference holding sections. The sixth clamping section corresponds to 135mm to 165mm and is configured as a hole-band pressure-limiting section. The seventh to ninth clamping sections correspond to 165mm to 255mm and are configured as reference holding sections. The tenth clamping section corresponds to 255mm to 280mm and is configured as a bending line pressure-limiting section. The eleventh clamping section corresponds to 280mm to 300mm and is configured as an edge-releasing section. Adjacent functional sections form a transition compensation execution group through the boundary of adjacent clamping sections, or an independent transition compensation section can be set when the execution element allows.

[0130] In this embodiment, the offset of the clamping line of the reference holding section is set to 2.0mm to 2.8mm. The offset of the clamping line of the bending line pressure limiting section is set to 3.5mm to 5.2mm. The offset of the clamping line of the hole band pressure limiting section is set to 4.5mm to 6.0mm. The offset of the clamping line of the edge relief section is set to 4.0mm to 5.5mm. The variation of the clamping line offset between adjacent clamping sections is controlled to not exceed 0.8mm. The above parameters enable the reference holding section to form an end face reference constraint close to the shear line, and keep the hole band pressure limiting section, bending line pressure limiting section and edge relief section away from the shear line to reduce the risk of near-edge strong pressure.

[0131] In this embodiment, the clamping block along The coverage width is determined based on the corresponding functional zone boundary. The third to fifth compression sections and the seventh to ninth compression sections are segmented sections within a wider reference functional zone; their compression contact area is determined by their respective coverage width and compression contact surface. The effective contact width is determined. The sixth clamping section is a pressure-limiting section with holes; due to the low local stiffness of the mounting hole strip, its local damage constraint coefficient is lower than that of the reference holding section. The second and tenth clamping sections are pressure-limiting sections with bending lines; their local damage constraint coefficients are calibrated based on the bending line indentation limitation and subsequent cold bending stability.

[0132] When the product formulation indicates that the minimum unfolding distance from the mounting hole strip or pre-punched hole adjacent to the shear line is less than 6 times... At this point, the sixth clamping section enters the pressure-limited state of the perforated zone. The upper limit of the clamping compensation amount of the sixth clamping section can be set to 45% to 70% of the upper limit of the clamping compensation amount of the adjacent reference holding section. If the effective springback amount of the sixth clamping section is large, resulting in a higher clamping compensation requirement, the clamping compensation coordination module will allocate the excess compensation amount to the transition compensation execution groups on both sides. If the adjacent clamping section on one side belongs to the bending line pressure-limiting section, the functional adaptation coefficient of that side will be reduced, and it will preferentially diffuse to the transition compensation execution group or reference holding section on the other side.

[0133] During oblique shearing, the clamping compensation coordination module determines the shearing entry phase of each clamping section based on the shearing blade's entry direction. The edge slow-release section and adjacent sensitive pressure-limiting section on the first entry side are pre-pressurized and enter low-amplitude holding or slow release earlier after shearing in the corresponding area. The middle reference holding section maintains stable locking pressure. The clamping section on the later entry side enters locking pressure later and slows release later after shearing in the corresponding area. The slow release time of the transition compensation execution group is later than that of the adjacent sensitive pressure-limiting section or edge slow-release section to accommodate the off-surface changes caused by the release of adjacent areas.

[0134] After shearing is completed, the status acquisition module collects end face height data within a short delay window after the tool holder returns. At least three height points are collected for each clamping section. After removing burr peaks and vibration interference, the effective springback distance of each clamping section is obtained. The clamping compensation coordination module determines the local springback mutation amount based on the effective springback distance of adjacent clamping sections and limits the difference in clamping compensation amount between adjacent clamping sections accordingly. If the local springback mutation amount at a certain interface is large, the difference in compensation amount between the clamping sections on both sides of that interface is reduced, and the compensation amount is diffused to the transition compensation execution group.

[0135] like Figure 4 As shown, the amount of springback before and after compensation can be used together with the relative amount of clamping force in each clamping section to verify the compensation result. For the edge slow-release section, the bending line pressure-limiting section, and the hole strip pressure-limiting section, the clamping compensation coordination module takes over the over-limit compensation requirement through the adjacent transition compensation section or the reference holding section when the clamping force is limited, so that the peak value of springback after compensation in the sensitive area is controlled to decrease, while avoiding over-pressure in this section.

[0136] This embodiment can verify the maximum deviation of the end face from the surface, the sudden change in height between adjacent clamping sections, the fluctuation of the joint gap, the collapse depth of the perforated strip neighborhood, the indentation depth of the bending line neighborhood, the width of the edge collapse corner, and the area of ​​plating damage. For S350GD+ZM strip steel with a thickness of 2.0mm and an unfolded width of 300mm, after calibration by the first piece trial cut, the target for controlling the maximum deviation of the end face from the surface can be set to 0.22mm to 0.45mm, the target for controlling the sudden change in height between adjacent clamping sections can be set to no more than 0.15mm, and the target for controlling the collapse depth of the perforated strip neighborhood can be set to no more than 0.04mm.

[0137] Example 2

[0138] This embodiment describes the pre-cutting station before forming. The strip material is S340GD+ZM coated steel strip, and the strip thickness is... It is 1.8mm thick, with an unfolded width. The strip is 240mm long. After uncoiling, leveling, and pre-punching, it is pre-cut before entering the roll forming machine. The cut end face serves as the feeding reference end face before entering the roll forming machine.

[0139] In this embodiment, the functional band mapping module configures the corresponding clamping section in the web area as the reference holding section, the corresponding clamping section in the bend line neighborhood as the sensitive pressure limiting section, and the corresponding clamping section in the future rolled edge area on both sides as the edge slow-release section, based on the unfolded functional band information of the current C-type photovoltaic bracket purlin or bracket crossbeam. If the minimum distance from the edge of the pre-punched hole to the shear line is less than 8 times... If the corresponding pressing section is configured as a pressure-limiting section with holes, and the transition compensation section or transition compensation execution group is activated to handle the over-limit compensation requirements, then if the pre-punching position is far from the shear line, the pressure-limiting section with holes is not activated, and only the pressure-limiting section with bending lines and the edge relief rules are retained.

[0140] In this embodiment, the clamping line offset of the reference holding section is smaller than that of the clamping line offset of the sensitive pressure limiting section and the edge release section. The transition compensation section or transition compensation execution group forms a continuous offset change between the web area and the bending line neighborhood. The clamping compensation coordination module adjusts the compensation amount of each clamping section according to the effective springback deflection amount, but the sensitive pressure limiting section and the edge release section do not exceed their clamping compensation amount upper limit. If the deflection trend of the edge release section is large, the excess compensation requirement is allocated to the adjacent transition compensation section or transition compensation execution group, and the difference in compensation amount between the edge release section and the adjacent clamping section is limited by the local springback mutation amount.

[0141] This embodiment controls the end-face reference stability and the indentation near the bend line before entering the roll forming machine. Small controlled releases are allowed in the edge region, but the edge release gradient is limited by a transition compensation section to avoid significant edge warping at the roll forming inlet. Verifiable indicators include the maximum off-surface deviation of the reference holding section end face, the depth of the indentation near the bend line, the width of the edge collapse corner, and the straightness deviation of the front face entering the roll forming machine.

[0142] Example 3

[0143] This embodiment describes the defective section rejection station. When edge cracks, severe warping, coating scratches, wrinkles, misaligned punching, or partial bending are detected in the strip during uncoiling, leveling, or feeding, the defective section is sheared and rejected before entering the roll forming machine. In this embodiment, the strip is still coated strip for photovoltaic brackets; the sheared end face is used to restore the continuity of subsequent feeding, positioning, and roll forming.

[0144] In this embodiment, the functional strip mapping module still configures the reference holding section, sensitive pressure limiting section, edge release section, and transition compensation section according to the unfolded functional strip information of the subsequent cold-formed profile. Since the main purpose of abnormal section removal is to form an end face that can continue feeding, the clamping compensation coordination module can reduce the reference holding requirements of non-critical areas, but still retain the protection requirements of the guide rail bearing area, web reference strip, and hole strip neighborhood. The edge release section can allow for a larger controlled release. If the abnormal area is located at the edge or rolled edge area, the upper limit of the clamping compensation amount of the edge release section is still lower than that of the reference holding section to reduce edge coating damage and corner collapse.

[0145] This embodiment serves as a supplementary implementation to illustrate that the system can be adapted to different shearing stations. Its technical rules still adhere to functional band mapping, clamping line offset configuration, sensitive pressure limiting, transition compensation, adjacent segment compensation difference limitation, and cutting edge phase matching.

[0146] Comparative Example

[0147] Comparative Example 1 uses an integral clamping plate. The entire width of the strip uses the same clamping line offset and the same clamping amount, without distinguishing between the subsequent cold-bending functional strip. This method can reduce the overall bulge of the strip, but it is prone to over-pressure on the mounting hole strip, the area adjacent to the bending line, and the edge area. It is also difficult to balance the stability of the web reference area end face and the control of pressure damage in sensitive areas.

[0148] Comparative Example 2 uses segmented compression with equal width and equal pressure. Along The end-face springback release zone is divided into multiple equal-width clamping sections, each with the same clamping line offset and clamping amount, without functional zone mapping, sensitive pressure limiting, or transition compensation. This method can improve springback in some areas, but indentations or corner collapses may still occur in the mounting hole zone, bend line neighborhood, and edge areas, and height abrupt changes are prone to occur at the junction of adjacent sections.

[0149] Comparative Example 3 employs independent compensation for rebound in a single segment. Each compression segment independently increases its compression compensation based on its effective rebound amount, without limiting the difference in compensation between adjacent compression segments, nor allocating the excess demand of sensitive pressure-limiting segments to transition compensation segments. This method can easily cause overpressure in segments with large local rebound amounts, and can form secondary broken lines, stepped end faces, or local ripples at the junction of adjacent segments.

[0150] Compared to the comparative example above, this embodiment performs a physical mapping of the current end face springback release zone based on the subsequent cold bending unfolding functional zone, so that different clamping sections have different clamping line offsets, clamping compensation upper limits, and release sequences. Sensitive pressure limiting sections and edge slow-release sections are not directly subjected to strong pressure due to the increasing springback trend; the over-limit compensation requirement is undertaken by adjacent transition compensation sections or transition compensation execution groups. The difference in compensation between adjacent clamping sections is jointly limited by the local springback mutation amount and the functional section boundary state. For oblique blade shearing or swing shearing, the pre-compression, locking, and slow release of each clamping section are matched with the shear entry phase. This allows the stability of the corresponding end face of the reference holding section to be maintained without directly applying strong pressure to the mounting hole zone, bending line neighborhood, and edge area, and reduces the risks of secondary broken lines, local ripples, indentations, and entry phase mismatch introduced by segmented clamping.

[0151] In a complete operation, the operator or production line control system first selects the photovoltaic bracket profile product formula. The functional strip mapping module reads the unfolded width, mounting hole coordinates, bending line coordinates, web area coordinates, guide rail bearing area coordinates, edge curling area coordinates, and edge width. The shearing operating table carries and positions the photovoltaic bracket strip, and the end positioning components determine the shearing line position. The functional strip mapping module maps the unfolded functional strip to the edge along the... The system arranges the compression sections and outputs the configuration results of the reference holding section, sensitive pressure limiting section, edge slow-release section and transition compensation section.

[0152] Subsequently, the clamping compensation coordination module configures the clamping line offset and the upper limit of the clamping compensation amount for each clamping segment. The status acquisition module acquires the clamping displacement, initial end face status, and shearing entry phase. Before shearing begins, each clamping segment enters pre-compression according to its functional clamping segment type. After the oblique blade shearing begins, the clamping segment on the first entry side is briefly locked and released earlier after shearing, the middle reference holding segment is stably locked, and the clamping segment on the later entry side is locked and released later. If the compensation requirement of the sensitive pressure limiting segment or the edge release segment exceeds its compensation limit, the clamping compensation coordination module allocates the excess to the adjacent transition compensation segment or transition compensation execution group, and limits the difference in compensation amount between adjacent clamping segments according to the local springback mutation amount and the functional segment boundary status.

[0153] After shearing, the status acquisition module obtains the end face height data within the sampling window after the tool holder returns, removing burr peaks, vibration interference, and chip interference to obtain the effective springback clearance. The clamping compensation coordination module can use this effective springback clearance for clamping offset correction in the next shearing of the same specification. This correction is still constrained by the functional clamping section type, the upper limit of clamping compensation, the capacity of adjacent sections to compensate, and the pressure difference between adjacent sections. The above operation process enables the end face springback release zone to form a continuous and controlled release in different functional areas, avoiding the problem of simply increasing the full-width clamping force to handle end face springback.

[0154] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A segmented clamping compensation system for the springback of the sheared end face of a photovoltaic support strip, characterized in that, It includes a shearing module, a segmented clamping module, a function band mapping module, a status acquisition module, and a clamping compensation coordination module; The shearing module carries and positions the strip steel for the photovoltaic bracket, and cuts the strip steel along the shearing line; The segmented clamping module includes multiple clamping segments arranged along the shear line direction. Each clamping segment has a clamping contact portion for acting on the end face springback release band. The end face springback release band is a strip-shaped area located in the region adjacent to the shear line and extending along the shear line direction. During the shear blade cutting in and shear unloading, the end constraint is released and local off-surface springback occurs. The functional strip mapping module is used to configure multiple clamping sections into different functional clamping section types according to the unfolded functional strip information of the photovoltaic bracket cold-formed profile. The functional clamping section types include a reference holding section, a sensitive pressure limiting section, an edge relief section, and a transition compensation section. The reference holding section is the clamping section corresponding to the web area, guide rail bearing area, or the reference edge of the connecting strip of the subsequent cold-formed profile. The sensitive pressure limiting section is the clamping section corresponding to the mounting hole strip, the pre-punched hole neighborhood, the connecting hole neighborhood, the oblong hole neighborhood, or the bending line neighborhood. The edge relief section is the clamping section corresponding to the edge of the strip, the rolled edge area, or the subsequent edge forming area. The transition compensation section is the clamping section located between the reference holding section and the sensitive pressure limiting section, between the reference holding section and the edge relief section, or between different sensitive pressure limiting sections, and is used to accept changes in clamping behavior and clamping amount. The state acquisition module is used to acquire at least one of the following: effective off-surface amount of the end face spring-off release belt, clamping displacement, or shearing entry phase. The effective off-surface amount of the spring-off is the end face height deviation after removing burr peaks, chip interference, and shearing impact vibration, and is used to characterize the actual off-surface spring-off state of the end face spring-off release belt after unloading. The compression compensation coordination module is used to configure the compression line offset, compression compensation limit, and pre-compression, locking, and slow release sequence of each compression segment based on the functional compression segment type and status acquisition results. When the compression compensation demand of the sensitive pressure limiting segment or the edge slow release segment exceeds its compression compensation limit, the excess part is allocated to the adjacent transition compensation segment or transition compensation execution group, and the difference in compression compensation between adjacent compression segments is limited according to the local rebound mutation amount.

2. The photovoltaic support strip steel shearing end face springback segmented clamping compensation system according to claim 1, characterized in that: The functional band mapping module determines the functional compression section boundary of the corresponding compression section based on the unfolded functional band boundary of the mounting hole band, pre-punched hole neighborhood, bending line neighborhood, edge area, or rolled edge area, and configures the corresponding compression section as a sensitive pressure limiting section or an edge slow-release section; when the width of the web area, guide rail bearing area, or connecting band reference edge is greater than the coverage width of a single compression section, it is split into multiple reference holding sections, and the multiple reference holding sections after splitting still perform compression compensation according to the same functional compression section type.

3. The photovoltaic support strip steel shearing end face springback segmented clamping compensation system according to claim 1, characterized in that: The functional band mapping module configures a transition compensation section between two different functional compression sections, or configures adjacent compression sections near the boundary of functional sections as a transition compensation execution group. The transition compensation section or transition compensation execution group is used to take over the compression compensation amount given up by the adjacent sensitive pressure limiting section or the edge slow release section, and to make the compression line offset, the upper limit of the compression compensation amount or the slow release slope between adjacent functional compression sections transition continuously.

4. The photovoltaic support strip steel shear end face springback segmented clamping compensation system according to claim 1, characterized in that: The compression compensation coordination module configures the compression line offset according to the functional compression section type, so that the compression line offset of the reference holding section is smaller than the compression line offset of the sensitive pressure limiting section and the edge slow release section, and the compression line offset of the transition compensation section is located between the compression line offsets of adjacent functional compression sections and changes continuously along the shear line direction.

5. The photovoltaic support strip steel shearing end face springback segmented clamping compensation system according to claim 1, characterized in that: The compression compensation coordination module generates compression compensation requirements based on the basic holding requirements of each compression segment, the release trend amount, and the allowable controlled release amount. It then limits the compression compensation requirements according to the upper limit of the compression compensation amount of the corresponding functional compression segment, so that the sensitive pressure limiting segment and the edge slow release segment do not exceed their respective upper limits of compression compensation amount when the rebound trend increases.

6. The photovoltaic support strip steel shear end face springback segmented clamping compensation system according to claim 5, characterized in that: When the compression compensation demand of the sensitive pressure limiting section or the edge slow-release section exceeds the corresponding compression compensation limit, the compression compensation coordination module will allocate the excess compensation amount to the adjacent transition compensation section or transition compensation execution group; when the adjacent transition compensation section or transition compensation execution group reaches its own compression compensation limit, the remaining excess compensation amount will be allocated to the second adjacent transition compensation section, the second adjacent transition compensation execution group, or the reference holding section with remaining compensation capacity.

7. The photovoltaic support strip steel shear end face springback segmented clamping compensation system according to claim 6, characterized in that: When allocating the over-limit compensation amount, the compression compensation coordination module adjusts the allocation direction according to the type of adjacent functional compression sections. When an adjacent compression section on one side is a sensitive pressure limiting section or has reached the upper limit of the compression compensation amount, the module reduces or stops allocating the over-limit compensation amount to that side and allocates the corresponding over-limit compensation amount to the transition compensation section, the second adjacent transition compensation section, or the reference holding section with remaining compensation capacity on the other side.

8. The photovoltaic support strip steel shear end face springback segmented clamping compensation system according to claim 7, characterized in that: For the first having adjacent front and rear pressing sections The clamping compensation coordination module determines the local springback mutation amount based on the effective springback deflection of adjacent clamping sections, and limits the number of clamping sections according to the following formula: The difference in clamping compensation between each clamping section and its preceding adjacent clamping section: ， ， in, For the first The local rebound mutation amount corresponding to each compression segment For the first The effective springback distance corresponding to each compression section and They are respectively with the first The effective rebound distance of each adjacent clamping section and the next clamping section. To determine the reference clearance for trial cutting, For the first The amount of clamping compensation applied to each clamping section. In order to be with the first The amount of clamping compensation performed by the preceding clamping section adjacent to each clamping section. Based on the allowable pressure difference, The coefficient representing the influence of local rebound mutation amount. To characterize the functional boundary correction term representing the differences in functional and type-specific compression sections between adjacent compression sections, The functional boundary influence coefficient; the first The difference in compression compensation between each compression section and the next adjacent compression section is limited by the same rules.

9. The photovoltaic support strip steel shearing end face springback segmented clamping compensation system according to claim 1, characterized in that: The shearing module uses oblique shearing or swing shearing. The clamping compensation coordination module determines the shearing entry phase based on the center position of the clamping section, the position of the first entry edge, the position of the last entry edge, the shearing blade angle, or the blade holder stroke. Based on the shearing entry phase, the clamping section on the first entry edge is pre-pressed in advance and enters a slow release after shearing, so that the reference holding section is stably locked, and the clamping section on the last entry edge is delayed in locking and releasing, so that the release sequence of the transition compensation section is later than the adjacent sensitive pressure limiting section or the edge slow release section.

10. The photovoltaic support strip steel shear end face springback segmented clamping compensation system according to claim 1, characterized in that: The status acquisition module acquires the end face height data of the springback release strip within the delayed sampling window after the shearing component returns, and combines the height deviation after removing burr peaks, shearing vibration or chip interference from the clamping displacement as the effective springback clearance amount; the clamping compensation coordination module uses the effective springback clearance amount for the clamping compensation offset correction of the next shearing of strip steel of the same specification and process, and the offset correction is limited by the functional clamping section type, the upper limit of clamping compensation amount, the remaining clamping compensation capacity of the transition compensation section or transition compensation execution group, and the difference in clamping compensation amount between adjacent clamping sections.

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