A machining method for a guide and material guiding composite reference of a multi-station stamping progressive die

Abstract

The present application relates to stamping die manufacturing technical field, disclose a kind of multi-station stamping progressive die guide corrects composite datum processing manufacturing method, comprising S1 determines the multiple stations of progressive die, guide corrects datum station and guide material datum line;S2 with guide hole datum position as zero point, with guide material datum line as direction constraint, with step distance relationship as station transmission rule to establish datum chain;S3 on multiple to be processed mould parts process technology datum part, and form the common processing state of keeping same zero point and same direction constraint;S4 in common processing state processes guide corrects installation datum part, guide material installation datum part and station positioning datum part;S5 separates and carries out functional processing, and utilizes detection material belt to carry out through detection and correction processing.The present application can reduce cumulative deviation caused by inconsistent datum source and error inheritance of previous station by establishing and through datum chain of guide, guide material and station processing, improve consistency of progressive die manufacturing and assembly.

Description

Technical Field

[0001] This invention relates to the field of stamping die manufacturing technology, and in particular to a method for machining and manufacturing a composite reference for guiding and directing material in a multi-station progressive stamping die. Background Technology

[0002] Multi-station progressive dies are typically used to arrange multiple stamping processes such as punching, trimming, bending, flanging, shaping, and blanking in multiple consecutive stations of the same die. During production, the strip passes through multiple stations sequentially along the feeding direction and completes continuous stamping under the coordination of material guiding, alignment, and spacing. Since multi-station progressive dies involve multiple stations, multiple die plate components, and multiple positioning references, their manufacturing accuracy depends not only on the machining accuracy of individual die components but also on the alignment position, material guiding direction, pitch relationship, and reference transfer relationship between each station.

[0003] The existing manufacturing method of multi-station progressive stamping dies usually involves determining the position of each station based on the strip layout, and then machining the die components such as the die bearing component, the stripper bearing component, the punch bearing component, and the guide bearing component. Then, through assembly, trial molding, and local correction, each die component is made to meet the requirements of continuous stamping. In this process, the installation position of the guide component, the installation position of the guide component, and the machining position of each station are usually determined based on the drawing coordinates, the machining datum of a single template, the local clamping position, or the actual machining contour of the previous station.

[0004] However, the existing manufacturing method still has the following problems: When each mold component is processed separately, the datum is prone to discontinuity between the guiding datum, the material guiding datum, and the station processing datum, which leads to repeated alignment during assembly; at the same time, if the subsequent station uses the actual processed contour of the previous station, the outer edge of a single template, or the local clamping position as the positioning basis, the previous processing error is easily transmitted to the subsequent station along the feeding direction and gradually accumulates; in addition, during the trial molding or inspection process, even if the material strip is found to be not smooth, the guiding datum is offset, the material guiding is skewed, or the local station is misaligned, it is difficult to quickly determine the source of the deviation and determine the corresponding correction object.

[0005] Furthermore, in continuous stamping processes, the guide holes on the strip are usually formed by previous punching. During subsequent feeding, trimming, forming, or flanging processes, burrs, collapse, stretching, ellipticization, or local deformation may occur at the edges of the guide holes. If the actual hole center of the guide hole is directly used as the basis for deviation judgment during inspection or trial molding correction, the inspection deviation caused by the deformation of the guide hole itself is easily misjudged as the installation deviation of the guide component, the material guiding deviation, or the station positioning deviation, thus leading to inaccurate selection of the correction target.

[0006] Therefore, there is a need for a multi-station stamping progressive die manufacturing method that can establish a continuous reference chain between the guide hole reference position, the guide reference line and the strip pitch relationship during the manufacturing stage, and identify the detection interference caused by the deformation of the guide hole during the inspection stage, so as to suppress reference drift, block error inheritance and improve the accuracy of the correction object judgment. Summary of the Invention

[0007] The purpose of this invention is to solve the problems of datum drift and error inheritance in the processing of multi-station progressive dies in the prior art, and to propose a method for processing and manufacturing a composite datum for guiding and directing materials in multi-station progressive stamping dies.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a method for manufacturing a composite reference for guiding and directing material in a multi-station progressive die, comprising the following steps: S1: Determine multiple stations of the progressive die based on the strip layout of the part to be stamped, determine the guide reference station among the multiple stations, and determine the guide reference line based on the guide position of the strip. S2: Using the reference position of the guide hole of the guide reference station as the zero point, the guide reference line as the direction constraint, and the step distance relationship in the material strip layout as the station transfer rule, establish a reference chain between the guide hole, the guide edge and the station machining center. S3: Process reference parts corresponding to the reference chain are processed on multiple mold parts to be processed respectively, and the multiple mold parts to be processed are made to form a common processing state under the condition of maintaining the same zero point and the same direction constraint through the process reference parts; S4: In the common processing state, the guide mounting reference part, the guide mounting reference part and the station positioning reference part are processed according to the reference chain, and the station positioning reference part is transferred and determined from the guide reference station to the subsequent station according to the step relationship; S5: Separate the multiple mold components to be processed, and perform functional processing based on the process reference part or the reference processing part as the repositioning basis. Then, use the detection strip to perform station penetration detection, and correct the guide component installation reference part, guide component installation reference part or the corresponding station positioning reference part according to the deviation type obtained from the detection.

[0009] The beneficial effects of the technical solution provided by this invention include at least the following: This invention establishes a reference chain between the guide hole, the guide edge, and the machining center of the station by using the reference position of the guide hole at the guide reference station as the zero point, the guide reference line as the directional constraint, and the step distance relationship in the strip layout as the station transfer rule. This enables the installation positions of the guide component, the guide component, and the machining positions of each station to be determined under the same reference chain, reducing positional deviations caused by inconsistent reference sources between the guide, guide, and machining stations.

[0010] This invention processes process reference parts corresponding to the reference chain on multiple mold components to be processed, and enables multiple mold components to be processed to form a common processing state under the condition of maintaining the same zero point and the same direction constraint. This can maintain the continuity of processing coordinates among multiple mold components and reduce the assembly correction amount caused by clamping and aligning different templates separately.

[0011] This invention enables the positioning reference part of the workstation to be determined from the guiding reference workstation to the subsequent workstation according to the step distance relationship, and limits the subsequent workstation from using the actual processing contour of the previous workstation as the positioning basis. This can prevent the local processing error of the previous workstation from continuing to be transmitted to the subsequent workstation, and reduce the risk of cumulative workstation deviation along the feeding direction of multi-station continuous mold.

[0012] This invention utilizes a test strip with guide holes and guide edges to perform station penetration testing. Based on the guide deviation, guide deviation, and station deviation, the installation reference part of the guide component, the installation reference part of the guide component, or the station positioning reference part of the corresponding station are corrected respectively. This enables the test results to correspond with the correction object, reducing the need for repeated judgment of the source of deviation during the trial molding correction process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is an overall method flowchart provided for embodiments of the present invention; Figure 2 This is a schematic diagram illustrating the establishment of the reference chain and the determination of the machining center at each workstation, provided in an embodiment of the present invention. Figure 3 A comparison diagram of error inheritance and blocking error inheritance provided for embodiments of the present invention; Figure 4 This is a schematic diagram of the deviation detection, positioning, and correction closed loop provided in an embodiment of the present invention. Detailed Implementation

[0015] To further illustrate the technical means and effects adopted by the present invention to achieve its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation, structure, features, and effects of a method for manufacturing a multi-station progressive die with a guiding and material-guiding composite reference according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0017] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] The following describes in detail, with reference to the accompanying drawings, a specific scheme for the manufacturing method of a composite reference for guiding and material guiding in a multi-station progressive die provided by the present invention. The present invention aims to: transform the reference position of the guiding hole, the reference line of the material guiding, and the material strip pitch relationship into a manufacturing reference chain that runs through multiple die components and multiple stations during the manufacturing process of a multi-station progressive die, thereby reducing the cumulative deviation of stations caused by the dispersed processing, independent alignment, and inheritance of previous contour errors of each die component. Through this method, the progressive die maintains a unified zero point, direction constraint, and station transfer relationship during the processing, assembly, and inspection correction processes, thereby improving the consistency between progressive die guiding, material guiding, and station positioning.

[0019] Please see Figures 1 to 4 This invention illustrates a method for manufacturing a composite reference for guiding and directing material in a multi-station progressive die, comprising the following steps: S1: Determine multiple stations of the progressive die based on the strip layout of the part to be stamped, determine the guide reference station among the multiple stations, and determine the guide reference line based on the guide position of the strip.

[0020] In step S1, the guide reference line is determined by the guide position of the side of the strip, the guide position of the strip carrier, or the guide position of the waste carrier. The guide reference line extends along the feeding direction of the strip. The guide reference station is a station used to form guide holes or to cooperate with guide holes for positioning after the strip enters the continuous die.

[0021] Specifically, the strip layout of the part to be stamped refers to the continuous stamping arrangement determined according to the unfolded shape of the part to be stamped, the stamping process sequence, the overlap position, the carrier form and the feeding pitch.

[0022] Multiple workstations refer to punching workstations, trimming workstations, forming workstations, flanging workstations, shaping workstations, blanking workstations, or other workstations arranged sequentially along the material feeding direction to complete the processing of the stamped parts.

[0023] The guide reference station refers to the station used to establish the basis for subsequent positioning after the material strip enters the progressive die. This station can be the station used to punch guide holes, or it can be the reference station corresponding to the subsequent guide pins, guide parts and guide holes of the material strip.

[0024] The guide reference line is a linear reference used to limit the movement of the material belt along a predetermined feeding direction. It can be determined based on the side of the material belt, the middle carrier side of the material belt, the waste carrier side, or other guide positions that can stably reflect the feeding direction of the material belt.

[0025] The side guide position of the material strip refers to the position where the edge of the material strip mates with the guide part. The guide position of the material strip carrier refers to the guide position corresponding to the edge of the carrier in the material strip used to connect the semi-finished products or waste areas of each station. The guide position of the waste carrier refers to the position where the waste area or waste carrier forms a guide reference.

[0026] It is worth noting that the guiding reference station does not have to be the first physical station of the continuous die, as long as it can serve as the starting reference for positioning and transfer of subsequent stations; the guiding reference line is not limited to the outer edge of a single strip. When the structure of the part to be stamped is complex, the outer edge is discontinuous, or an intermediate carrier is needed for guidance, the strip carrier edge, the scrap carrier edge, or a stable guiding edge formed by the layout features can be selected as the guiding reference line.

[0027] Furthermore, when determining the guiding reference station and the material guiding reference line, the stiffness change of the strip before and after forming, the waste connection method, the floating material method, and the subsequent inspection method of the strip can be considered simultaneously. However, the above factors are not necessary conditions for limiting the scope of protection of this invention. Once the guiding reference station and the material guiding reference line are determined, they serve as the basis for establishing the reference chain in subsequent steps and will not be arbitrarily changed due to the outer edge, local machining surface, or temporary clamping position of a single mold component.

[0028] In one specific implementation, the part to be stamped is a thin sheet stamping part. Its strip layout includes stations such as punching guide holes, punching scrap, forming, flanging, shaping, and cutting. The manufacturing personnel first determine the arrangement order of each station along the feeding direction according to the strip layout, and select the station near the strip entry end and used to form the guide hole as the guide reference station. At the same time, the edge of the strip side that is not cut off in advance during the stamping process and can continuously pass through multiple stations is selected as the guide reference line. If the part to be stamped undergoes large forming or cutting at the previous station, causing the outer edge of the strip to be unstable as a guide reference, the middle carrier edge or the scrap carrier edge can be used as the guide reference line to ensure the continuity of the guide reference line in subsequent stations.

[0029] In another specific implementation, the part to be stamped is arranged in a layout method with a scrap carrier. The scrap carrier is fed together with the material strip in multiple stations and is separated from the part at or near the end station. At this time, the guide edge on the scrap carrier can be used as the guide reference line, the station used to punch the guide hole can be used as the guide reference station, and the relative relationship between the guide edge of the scrap carrier and the guide hole can be used as the basis for establishing the reference chain in the future.

[0030] When performing step S1, it should first be confirmed which features in the strip layout persist in multiple stations. The strip edge or carrier edge that will not be cut off in the previous station and will not cause significant unstable deformation due to forming should be selected as the guide reference line. If there are guide positions on both sides of the strip, one side can be selected as the main guide reference line and the other side as the auxiliary verification position according to the mold structure layout, feeding direction stability and inspection convenience. For the guide reference station, its step distance relationship with the subsequent station should be clearly corresponding, and local processing features that cannot reflect the positioning relationship of the subsequent station should be avoided as the guide reference.

[0031] S2: Using the reference position of the guide hole of the guide reference station as the zero point, the guide reference line as the direction constraint, and the step distance relationship in the strip layout as the station transfer rule, a reference chain is established between the guide hole, the guide edge, and the station machining center.

[0032] In step S2, the reference chain includes the zero point coordinates determined by the reference position of the guide hole, the direction coordinates determined by the guide reference line, and the coordinates of each machining center determined by the step distance relationship. The coordinates of each machining center are determined by the zero point coordinates, the direction coordinates, and the step distance relationship.

[0033] In step S2, after establishing the reference chain, the machining position of each mold component to be processed is determined by the reference chain, and independent station references are not re-established based on the outer edge, individual machining surface or individual clamping position of each mold component to be processed.

[0034] Specifically, the guide hole reference position refers to the position corresponding to the design center of the guide hole in the guide reference station, which is used to determine the zero point in the manufacturing coordinates.

[0035] The zero point does not only represent the origin of mathematical coordinates, but also indicates that subsequent mold component processing, station positioning, and inspection corrections all trace back to the same guiding source position reference.

[0036] The guide baseline, as a directional constraint, refers to the use of the guide baseline to determine the feeding direction of the material strip or the coordinate direction related to the feeding direction of the material strip, so that the subsequent machining centers of each station can be deployed under the same directional constraint.

[0037] The step distance relationship refers to the transmission relationship between adjacent stations along the feeding direction in the material strip layout, and also includes the relative positional relationship between the guiding reference station and subsequent stations.

[0038] The datum chain is a manufacturing datum transfer relationship formed by zero point, direction constraint, and step distance relationship. It is used to simultaneously constrain the installation position of the guide component, the installation position of the material guide component, and the position of each machining center. The datum chain is not a simple theoretical coordinate relationship, but an actual machining positioning system formed by the datum position of the guide hole, the material guide datum line, and the process datum parts on multiple mold components to be processed. During the processing, each machining center at each station traces back to the datum position of the guide hole and the material guide datum line through the corresponding process datum part, so that multiple mold components to be processed maintain a unified positioning source at different processing stages.

[0039] It is worth noting that the reference chain is different from a simple machining coordinate system. A simple machining coordinate system can only be used for a certain template or a certain clamping, while the reference chain in this invention is used to run through multiple mold parts to be processed, multiple stations, and subsequent inspection and correction processes. After the reference chain is established, the machining position of each mold part to be processed is no longer re-determined based on its own outer edge, individual machining surface, single clamping alignment line, or the actual machining contour of the previous station. The purpose of this setting is to avoid the occurrence of multiple independent local references between different templates or different stations, and to prevent the local reference error from being inherited by the subsequent station along the feeding direction. Even if there is a machining deviation in the local contour of a certain station, the local contour is not used as the positioning starting point of the subsequent station. The subsequent station is still determined by the guide hole reference position, the guide reference line, and the step distance relationship.

[0040] In one specific implementation, the design center of the guide hole of the guide reference station is taken as the zero point, and the guide line of the material strip side is taken as the reference line for the feeding direction. The machining centers of the second station, the third station and so on until the end station are determined in sequence according to the step distance set in the material strip layout. The machining centers of each station are obtained by the guide hole design center along the material guide reference line according to the step distance relationship. At the same time, the transverse coordinates are determined according to the design position in the width direction of the material strip. Then, these machining centers are mapped to the manufacturing data of the die bearing component, the unloading bearing component, the punch bearing component and the material guide bearing component, so that the corresponding positions on different mold components to be processed all come from the same reference chain.

[0041] In another specific implementation, if the progressive die uses an intermediate carrier or a scrap carrier for guidance, the reference position of the guide hole is taken as the zero point, and the edge of the intermediate carrier or the scrap carrier is taken as the guide reference line. In this case, the machining center of each station is not determined based on the outer contour edge of the strip, but based on the reference position of the guide hole, the guide edge of the carrier, and the relationship between the layout step distance. In this way, even if the outer edge of the strip is punched or deformed at some stations, it will not affect the reference transfer of the machining center of the subsequent stations.

[0042] When performing step S2, the guide hole reference position, guide reference line, and step distance relationship should be established as a whole, rather than determining the local coordinates of each template separately and then assembling them. For cases where a machining program needs to be generated, the reference chain can be used as the common coordinate source for subsequent machining programs, inspection programs, or assembly verification programs. For cases where manual or semi-automatic machining is required, it should be ensured that the process reference part, reference machining part, and functional machining position of each mold part to be machined can be traced back to the same reference chain. If reclamping occurs during subsequent machining, the same zero point and the same direction constraint should be restored through the process reference part, rather than re-establishing a new station reference based on the template outline or the already machined contour.

[0043] S3: Process the process reference parts corresponding to the reference chain on multiple mold parts to be processed, and make the multiple mold parts to be processed form a common processing state under the condition of maintaining the same zero point and the same direction constraint through the process reference parts.

[0044] In step S3, the multiple mold components to be processed include two or more of the following: components for supporting the die working part, components for supporting the unloading working part, components for supporting the punch mounting part, and components for supporting the material guiding working part. The process reference parts on each mold component to be processed are generated by the same reference chain.

[0045] In step S3, the process reference part includes at least two reference positioning parts that are spaced apart from each other. One reference positioning part is used to correspond to the zero point, and the other reference positioning part is used to correspond to the direction constraint. Multiple mold parts to be processed form a common processing state after corresponding to each other through their respective process reference parts. The common processing state includes the same clamping state after multiple mold parts to be processed are stacked, or the processing state in which multiple mold parts to be processed are sequentially positioned and processed in the same processing coordinate system and the zero point and direction constraint are not re-established during the processing.

[0046] Specifically, the mold components to be processed refer to the mold components that need to bear or form functions such as guiding, material guiding, punching, unloading, punch installation, die processing or other workstations during the continuous die manufacturing process.

[0047] The components used to support the die working part can be die templates, die fixing plates, die insert support plates, or other components with die working part mounting or machining functions; the components used to support the unloading working part can be unloading plates, unloading support plates, or components related to unloading holes or unloading surfaces; the components used to support the punch mounting part can be punch fixing plates, punch mounting plates, or components used to define the position of the punch; the components used to support the material guiding working part can be material guiding plates, material guiding support plates, or components related to material strip guiding.

[0048] A process reference part refers to a positioning base pre-processed to ensure that multiple mold parts to be processed can return to the same reference chain during the processing. It can be represented as a reference hole, reference groove, reference edge, positioning surface or a combination of the above forms. At least two reference positioning parts are arranged at intervals to simultaneously define the zero point and direction constraint. One reference positioning part corresponds to the zero point formed by the reference position of the guide hole, and the other reference positioning part is used to define the directional relationship relative to the guide reference line.

[0049] It is worth noting that the co-processing state is not limited to multiple mold parts that must be physically stacked and processed in one go. For mold parts that are suitable for stacking in terms of thickness, material, heat treatment state, machining allowance, or processing method, the same clamping state after stacking can be adopted. For mold parts that are not suitable for stacking, the method of sequential positioning and processing under the same machining coordinate system can also be adopted. Regardless of the method used, the common point is to maintain the same zero point and the same directional constraint during the processing, and not to re-establish independent station references. In other words, the so-called co-processing state emphasizes the continuity of manufacturing reference and machining coordinates, rather than simply being limited to physical simultaneous cutting or simultaneous forming.

[0050] Multiple mold components to be processed can form a corresponding positioning relationship through through positioning holes and positioning pins, and the corresponding reference processing parts can be processed while keeping the positioning pins in place.

[0051] In one specific embodiment, after rough machining, heat treatment, and planar machining, the die bearing component, the unloading bearing component, and the punch bearing component are respectively machined with two process reference holes according to the reference chain. The first process reference hole corresponds to the reference position of the guide hole and is used to restore the zero point. The second process reference hole is set at an interval from the first process reference hole and has a corresponding relationship with the guide reference line, and is used to restore the directional constraint. Subsequently, the above-mentioned multiple mold components to be processed are stacked, positioned, and pressed together by the same set of positioning parts, so that each mold component to be processed is in the same clamping state. In this state, the subsequent guide mounting reference part, the guide mounting reference part, and the station positioning reference part are machined.

[0052] In another specific implementation, if the material guide bearing component is not suitable for stacking with the die bearing component and the unloading bearing component due to thickness or structural reasons, the guide hole reference position and the material guide reference line can be calibrated first in the machine tool coordinate system according to the reference chain. Then, each mold component to be processed is clamped in sequence. Each time it is clamped, the same zero point and the same direction constraint are restored by using the process reference part on the mold component to be processed. During the processing, the independent station reference is not re-established based on the outer edge of the component, the individual processing surface or the temporary clamping position. Although this method does not involve multiple components being stacked and processed at the same time, it still belongs to the common processing state of maintaining the continuity of the reference in the same processing coordinate system.

[0053] When performing step S3, it should be ensured that the process reference parts on each mold component to be processed are generated by the same reference chain. Avoid one component using the guide hole reference position as the zero point, while another component uses the template outline edge or other local references as the zero point. If the same clamping state after stacking is adopted, it should be ensured that the correspondence of the process reference parts of each mold component to be processed will not be affected by clamping, gaps or burrs after stacking and positioning. If the state of sequential positioning and processing under the same processing coordinate system is adopted, the zero point and direction constraint should be restored through the process reference part after each clamping, and it should be confirmed that no coordinate drift has occurred. For the processing sequence, the process reference part can be processed first, and then the reference processing part in the common processing state can be processed to ensure that the subsequent processing actions are constrained by the same reference chain.

[0054] S4: Under the common processing state, the guide mounting reference part, the guide mounting reference part and the station positioning reference part are processed according to the reference chain, and the station positioning reference part is transferred and determined from the guide reference station to the subsequent station according to the step distance relationship.

[0055] In step S4, the guide mounting reference, the guide mounting reference, and the station positioning reference are all machined in the same machining coordinate system, and the station positioning reference of the subsequent station is determined by the step distance relationship in the previous reference chain, and the actual machining contour of the previous station is not used as the positioning basis of the subsequent station.

[0056] Specifically, the mounting reference part of the guide component refers to the machining reference used to define the mounting position of the guide pin, guide block, guide hole mating part or other guide-related components. It can be represented as a mounting hole, positioning hole, mounting groove, positioning surface or other machining parts that can be used to determine the position of the guide component.

[0057] The guide component mounting reference part refers to the machining reference used to define the mounting position of guide plates, guide blocks, guide pins or other guide-related components.

[0058] The workstation positioning reference part refers to the reference machining part used to determine the machining center, punch installation position, die machining position, unloading hole position or insert installation position of each workstation.

[0059] In this embodiment, the reference machining section includes at least a guide component mounting reference section, a material guide component mounting reference section, and a station positioning reference section.

[0060] The same machining coordinate system means that when machining the above-mentioned reference machining parts, the zero point, direction constraints and step distance relationship determined by the aforementioned reference chain are used as the coordinate source.

[0061] It is worth noting that the key to this step is not simply machining a certain hole or a certain installation position, but rather ensuring that the mounting base of the guide component, the mounting base of the material guide component, and the positioning base of the workstation are all constrained by the same reference chain. The positioning base of the subsequent workstation is determined by the guide base workstation according to the step relationship in the material strip layout, rather than using the contour, hole edge, cut edge, or forming edge already machined in the previous workstation as the alignment basis for the next workstation. This setting can avoid the local machining error of the previous workstation being inherited by the subsequent workstation. The actual machining contour of a certain workstation can be used to check the machining quality of that workstation itself, but it is not used as the basis for re-establishing the positioning base of the subsequent workstation.

[0062] In one specific implementation, after multiple mold components to be processed are in a common processing state, the guide mounting reference part is first processed according to the reference chain to make it correspond to the reference position of the guide hole; then the guide mounting reference part is processed according to the guide reference line to make the guide part correspond to the guide edge of the strip after installation; then, according to the step distance relationship in the strip layout, the station positioning reference parts of each station are processed in sequence. For the second station, the third station and subsequent stations, the station positioning reference parts are determined by the guide hole reference position of the guide reference station along the guide reference line direction according to the step distance relationship, rather than by aligning based on the die contour or punching contour that has been processed in the previous station.

[0063] In another specific implementation, a certain subsequent station is a flanging or shaping station. Its working contour may need to be finely adjusted in subsequent functional processing based on the trial molding situation. However, the station positioning reference part corresponding to this station is still processed according to the reference chain. The subsequent correction of the working contour does not change the relationship between the station positioning reference part and the guide hole reference position and the material guide reference line. This can avoid the positioning reference of the subsequent blanking station, punching station or cutting station being affected by the local correction of the forming station.

[0064] When performing step S4, priority should be given to ensuring the datum relationship between the guide mounting datum, the material guide mounting datum, and the station positioning datum, rather than focusing only on the dimensions of a single machining part. For multiple station positioning datums arranged along the feeding direction, they should be machined one by one according to the step distance relationship in the datum chain. If it is necessary to change the tool, adjust the machining method, or switch to different equipment during the machining process, the same zero point and direction constraint should be restored through the process datum before machining can continue. The actual machining contour of the previous station should not be used as the positioning basis for the subsequent station. For mold parts that require heat treatment or secondary finishing, the datum chain relationship should also be restored during secondary machining using the process datum or datum machining part formed in the previous step.

[0065] S5: Separate multiple mold parts to be processed, and perform functional processing based on the process reference part or reference processing part as the repositioning basis. Then, use the inspection strip to perform station through-detection. Based on the deviation type obtained from the detection, correct the guide part installation reference part, guide part installation reference part or the corresponding station positioning reference part.

[0066] Preferably, the test strip is made of a material with the same or higher stiffness and the same or similar thickness as the test mold strip, so as to ensure that the stress state during the test is consistent with the actual production state; during the test, it is preferred to manually feed or automatically feed at low speed under no pressure or slight pressure state, so as to reduce the influence of the warping, stretching or plastic deformation of the test strip itself on the test results and improve the accuracy of deviation judgment.

[0067] Preferably, for positional deviations in the mounting base of the guide component, the mounting base of the material guide component, or the positioning base of the workstation, the deviation can be corrected by means of local trimming, supplementary processing, eccentric trimming, remachining of mounting holes or positioning surfaces, etc., depending on the magnitude of the deviation. When the deviation exceeds the reserved trimming allowance, the corresponding reference relationship can be re-established by replacing the insert, remachining the corresponding mounting part, or replacing the local functional module.

[0068] In step S5, the detection strip has guide holes and guide edges corresponding to the strip layout. After the detection strip passes through multiple stations in sequence, the deformation state of the guide hole edge is first identified. When the guide hole edge is deformed, the effective guide reference position is determined according to the undeformed edge area of ​​the guide hole, the positional relationship between multiple guide holes, or the positional relationship between the guide hole and the guide edge. Then, the deviation between the effective guide reference position and the guide component mounting reference, the deviation between the guide edge and the guide component mounting reference, and the deviation between the corresponding station and the station positioning reference are detected.

[0069] When the identification results indicate that the deformation of the guide hole edge affects the actual hole center, the actual hole center is not used as the basis for deviation judgment. Instead, the correspondence between the guide component mounting reference and the test strip is re-judged based on the effective guide reference position. When the detected deviation is the deviation between the effective guide reference position and the guide mounting reference part, the guide mounting reference part is corrected. When the detected deviation is the deviation between the guide edge and the guide component mounting reference part, the guide component mounting reference part or the guide working part is corrected and processed. When the detected deviation is the deviation between the corresponding workstation and the workstation positioning reference, the workstation positioning reference of that workstation is corrected.

[0070] Specifically, functional processing refers to the processing performed on each mold component to be processed after the aforementioned reference processing part has been formed, which is related to the specific stamping function.

[0071] The machining of the die working part may include machining the die cavity, cutting edge, insert mounting area or scrap channel; the machining of the unloading working part may include machining the unloading hole, unloading surface, clearance part or unloading mating surface; the machining of the punch mounting part may include machining the punch mounting hole, punch fixing part, punch positioning part or punch mating surface; the machining of the material guiding working part may include machining the material guiding surface, material guiding groove, material guiding component mounting surface or working part that mates with the guide edge of the strip.

[0072] The inspection strip refers to the strip used to inspect the guiding, guiding and station positioning relationships in a progressive die. It has guide holes and guide edges corresponding to the strip layout, and may also have inspection holes, inspection edges, inspection marks or local contours corresponding to the corresponding station positions.

[0073] Deviation type refers to the category of deviation identified based on the correspondence between the detection material strip and the guide mounting reference, the guide mounting reference, and the station positioning reference.

[0074] It is worth noting that in this step, although the separated mold parts to be processed need to be functionally processed separately, their repositioning is still based on the process reference part or reference processing part formed in the previous step, rather than re-establishing an independent station reference based on the template outline edge, temporary clamping surface or a certain local working contour. This ensures that the functional processing position is still constrained by the reference chain.

[0075] It is worth noting that the guide holes on the inspection strip may be deformed due to punching burrs, hole edge collapse, material stretching, local tearing, or subsequent forming traction. Therefore, when using the inspection strip for station-to-station through-through inspection, it is not advisable to directly use the actual hole center of the guide hole as the sole inspection benchmark. Instead, the hole edge deformation state of the guide hole should be identified first. The effective guide benchmark position mentioned in this article refers to the inspection guide benchmark position determined by the undeformed hole edge area in the guide hole that can reflect the original design hole position, the positional relationship between multiple guide holes, or the positional relationship between the guide hole and the guide edge when there is hole edge deformation.

[0076] For cases where the guide hole is partially deformed, the effective guide reference position can be determined by selecting the undeformed hole edge area. For cases where multiple guide holes are slightly deformed, the effective guide reference position can be determined by combining the positional relationships between the multiple guide holes and the positional relationships of the guide edges. For cases where the deformation of the guide hole has affected the insertion or fit of the guide component, it should first be identified as a detection deviation caused by the deformation of the guide hole. Then, based on the effective guide reference position, it should be re-evaluated whether the installation reference part of the guide component needs to be corrected. This can avoid misjudging the deformation of the guide hole itself as a deviation of the station positioning reference part.

[0077] Furthermore, the purpose of detecting the material strip is not simply to determine whether the progressive die can pass through the material strip, but to distinguish the source of deviation. If the effective guide reference position does not correspond to the guide component mounting reference, it usually indicates that there is a deviation in the guide-related reference. If there is an offset between the guide edge and the guide component mounting reference or the guide working part, it usually indicates that there is a deviation in the guide-related reference. If the effective guide reference position and the guide edge can correspond, but there is a positional deviation at a certain station or several subsequent stations, it usually indicates that there is a deviation in the station positioning reference of the corresponding station or that it needs to be corrected. The above judgment method can make the detection results correspond to the correction object, avoiding blindly adjusting multiple parts during trial molding correction.

[0078] In one specific implementation, the die support component, unloading support component, punch support component, and guide support component, which have been processed in a common processing state, are separated. After separation, the die support component is repositioned and the die working part is processed using the aforementioned process reference part; the unloading support component is repositioned and the unloading working part is processed using the aforementioned process reference part or guide mounting reference part; the punch support component is repositioned and the punch mounting part is processed using the aforementioned station positioning reference part; the guide support component is repositioned and the guide working part is processed using the aforementioned guide mounting reference part. After each function is processed, the relevant mold components are trial-assembled, and the detection strip passes through multiple stations sequentially along the feeding direction. If the guide hole of the detection strip can correspond to the guide mounting reference part, but there is a continuous offset between the guide edge and the guide working part, the guide mounting reference part or the guide working part is corrected.

[0079] In another specific implementation, the detection strip can pass smoothly through the previous station, the guide hole corresponds to the guide mounting base, and the guide edge also corresponds to the guide mounting base. However, at a certain subsequent station, the station detection mark on the detection strip does not correspond to the station positioning base of that station. In this case, it is determined that the source of the deviation is mainly related to the station positioning base of that station. The station positioning base of that station is corrected without changing the guide base station and the guide base line. If multiple subsequent stations show a continuous offset trend along the feeding direction, the correspondence between the positioning bases of these stations and the step distance is checked first, and the positioning bases of the corresponding stations are corrected.

[0080] In another specific implementation, when the guide hole of the detection strip enters the guide reference station or subsequent guide position, an insertion deviation occurs, but there is no obvious and continuous offset between the guide edge and the guide working part. In this case, it is determined that the deviation mainly comes from the guide mounting reference part. The guide mounting reference part is corrected and processed. After correction, the detection strip is used again for through-testing to confirm that the guide hole and the guide mounting reference part have restored their corresponding relationship. Then, the guide deviation and station deviation are checked again.

[0081] When multiple stations are offset as a whole in the same direction, it can be determined as a guide reference deviation; when the deviation increases with each station in the feeding direction, it can be determined as a station pitch transmission deviation; when the guide hole cannot continuously correspond to the guide component, it can be determined as a guide reference deviation.

[0082] When performing step S5, the coordinate relationship between each mold component to be processed and the reference chain should be restored first using the process reference part or reference machining part, and then the functional machining should be performed. After the functional machining is completed, the inspection strip should pass through multiple stations in sequence according to the feeding direction of the strip layout. During inspection, the correspondence between the guide hole and the guide component mounting reference part can be determined first, then the correspondence between the guide edge and the guide component mounting reference part or the guide working part can be determined, and finally the correspondence between the inspection features of each station and the corresponding station positioning reference part can be determined. When correcting the machining, the corresponding correction object should be selected according to the type of deviation to avoid directly correcting the subsequent station before the guide deviation is eliminated, or blindly correcting the local station before the guide deviation is eliminated. After the correction is completed, the inspection strip can be used again for re-inspection to confirm that the corrected guide, guide and station positioning relationship is still under the same reference chain.

[0083] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for machining and manufacturing a composite reference for guiding and directing material in a multi-station progressive die, characterized in that, Includes the following steps: S1: Determine multiple stations of the progressive die based on the strip layout of the part to be stamped, determine the guide reference station among the multiple stations, and determine the guide reference line based on the guide position of the strip. S2: Using the reference position of the guide hole of the guide reference station as the zero point, the guide reference line as the direction constraint, and the step distance relationship in the material strip layout as the station transfer rule, establish a reference chain between the guide hole, the guide edge and the station machining center. S3: Process reference parts corresponding to the reference chain are processed on multiple mold parts to be processed respectively, and the multiple mold parts to be processed are made to form a common processing state under the condition of maintaining the same zero point and the same direction constraint through the process reference parts; S4: In the common processing state, the guide mounting reference part, the guide mounting reference part and the station positioning reference part are processed according to the reference chain, and the station positioning reference part is transferred and determined from the guide reference station to the subsequent station according to the step relationship; S5: Separate the multiple mold components to be processed, and perform functional processing based on the process reference part or the reference processing part as the repositioning basis. Then, use the detection strip to perform station penetration detection, and correct the guide component installation reference part, guide component installation reference part or the corresponding station positioning reference part according to the deviation type obtained from the detection.

2. The method for machining and manufacturing the composite reference for guiding and directing material in a multi-station progressive die as described in claim 1, characterized in that: In step S1, the guiding reference line is determined by the guide position of the side of the strip, the guide position of the strip carrier, or the guide position of the waste carrier. The guiding reference line extends along the feeding direction of the strip. The guiding reference station is a station used to form a guiding hole or to cooperate with the guiding hole for positioning after the strip enters the continuous mold.

3. The method for machining and manufacturing the composite reference for guiding and directing material in a multi-station progressive die as described in claim 1, characterized in that: In step S2, the reference chain includes the zero point coordinates determined by the reference position of the guide hole, the direction coordinates determined by the guide reference line, and the coordinates of each machining center determined by the step distance relationship. The coordinates of each machining center are jointly determined by the zero point coordinates, the direction coordinates, and the step distance relationship.

4. The method for machining and manufacturing the guiding and material guiding composite reference of a multi-station stamping progressive die according to claim 1, characterized in that: In step S2, after the reference chain is established, the processing position of each mold component to be processed is determined by the reference chain, and independent station references are not re-established based on the outer edge, individual processing surface or individual clamping position of each mold component to be processed.

5. The method for manufacturing a composite reference for guiding and directing material in a multi-station progressive die as described in claim 1, characterized in that: In step S3, the plurality of mold components to be processed include two or more of the following: components for supporting the die working part, components for supporting the unloading working part, components for supporting the punch mounting part, and components for supporting the material guiding working part. The process reference parts on each mold component to be processed are generated by the same reference chain.

6. The method for manufacturing the guiding and material guiding composite reference for multi-station stamping progressive dies according to claim 1, characterized in that: In step S3, the process reference part includes at least two reference positioning parts that are spaced apart from each other. One reference positioning part is used to correspond to the zero point, and the other reference positioning part is used to correspond to the directional constraint. Multiple mold parts to be processed form the common processing state after corresponding to each other through their respective process reference parts. The common processing state includes the same clamping state after multiple mold parts to be processed are stacked, or the processing state in which multiple mold parts to be processed are sequentially positioned and processed in the same processing coordinate system and the zero point and directional constraint are not re-established during the processing.

7. The method for machining and manufacturing the guiding and material guiding composite reference of a multi-station stamping progressive die according to claim 1, characterized in that: In step S4, the guide mounting reference part, the guide mounting reference part, and the station positioning reference part are all machined in the same machining coordinate system, and the station positioning reference part of the subsequent station is determined by the step distance relationship in the previous reference chain, and the actual machining contour of the previous station is not used as the positioning basis of the subsequent station.

8. The method for manufacturing a composite reference for guiding and directing material in a multi-station progressive die as described in claim 1, characterized in that: In step S5, the functional processing includes at least one of the following: processing of the die working part, processing of the unloading working part, processing of the punch mounting part, and processing of the guiding working part. When performing the functional processing, each mold component to be processed is repositioned by the process reference part or reference processing part formed in the previous step, and the coordinate relationship between the functional processing position and the reference chain is maintained.

9. The method for manufacturing a composite reference for guiding and directing material in a multi-station progressive die as described in claim 1, characterized in that: In step S5, the detection strip has guide holes and guide edges corresponding to the strip layout. After the detection strip passes through multiple stations in sequence, the deformation state of the guide hole edge is first identified. When the guide hole edge is deformed, the effective guide reference position is determined according to the undeformed guide hole edge area, the positional relationship between multiple guide holes, or the positional relationship between the guide hole and the guide edge. Then, the deviation between the effective guide reference position and the guide component mounting reference part, the deviation between the guide edge and the guide component mounting reference part, and the deviation between the corresponding station and the station positioning reference part are detected.

10. The method for machining and manufacturing the guiding and material guiding composite reference of a multi-station stamping progressive die according to claim 9, characterized in that: When the identification result indicates that the deformation of the guide hole edge affects the actual hole shape center of the guide hole, the actual hole shape center of the guide hole is not used as the basis for deviation judgment. Instead, the correspondence between the guide component mounting reference part and the detection material strip is re-judged based on the effective guide reference position. When the detected deviation is the deviation between the effective guide reference position and the guide mounting reference part, the guide mounting reference part is corrected. When the detected deviation is the deviation between the guide edge and the guide component mounting reference part, the guide component mounting reference part or the guide working part is corrected and processed. When the detected deviation is the deviation between the corresponding workstation and the workstation positioning reference, the workstation positioning reference of that workstation is corrected.

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