A control method and device for a preform cutting apparatus

Abstract

The present application relates to the technical field of preform processing, and particularly relates to a control method and device of a preform cutting equipment. The method comprises the following steps: firstly, obtaining material parameters and structure parameters of a non-equal-thickness preform; determining a pre-pressing force applied by each independent pre-pressing block to the non-equal-thickness preform based on the material parameters and the structure parameters; and determining a shearing force applied by a shearing mechanism to the non-equal-thickness preform based on an actual pre-pressing force collected by each pressure sensor. In this way, the present application can improve the shearing quality and efficiency of the non-equal-thickness preform.

Description

Technical Field

[0001] This invention relates to the field of prefabricated body cutting technology, and in particular to a control method and apparatus for prefabricated body cutting equipment. Background Technology

[0002] Prefabricated structures (such as carbon fiber prefabricated structures and foam prefabricated structures) often require cutting according to actual usage needs during the cutting process to obtain finished products that meet dimensional requirements. Carbon fiber prefabricated structures, formed by weaving or laying up carbon fiber yarns, have a loose structure with gaps between the yarns and are often of uneven thickness. If cut directly before shearing, the uneven thickness and internal density of different parts of the prefabricated structure can easily lead to problems such as uneven shearing surfaces, yarn fuzzing, edge tearing, and delamination, severely affecting product processing quality.

[0003] To address the aforementioned issues, related technologies typically involve pre-compressing the preform before shearing. Pre-compression smooths the surface of the preform, makes the internal yarn arrangement more compact, and stabilizes the structure, thereby improving the shearing effect. Most pre-compression methods employ integral pre-compression blocks, which use a single, monolithic pre-compression structure to apply pressure to the entire preform. This method presents several problems: First, due to the non-uniform thickness of the carbon fiber preform, the force is uneven across different parts when the integral pre-compression block is applied. Areas with greater thickness experience excessive compressive force, which can easily lead to yarn deformation and leave obvious compression marks on the preform surface, damaging the surface integrity and internal yarn arrangement. Second, the pre-compression and shearing processes are independent of each other. The pre-compression pressure cannot be linked to the shearing force of the cutter, and the thickness information of the preform obtained during the pre-compression process cannot be used to accurately match the cutting force. This results in a mismatch between the cutting force and the pre-compressed layer thickness and actual state of the carbon fiber preform during shearing. Either the shearing force is insufficient, leading to incomplete yarn shearing and fuzzing, or the force is excessive, causing equipment wear and secondary damage to the preform. It is difficult to balance shearing efficiency and processing quality.

[0004] Based on this, the present invention proposes a control method for a prefabricated body cutting device to solve the above-mentioned technical problems. Summary of the Invention

[0005] This invention describes a control method for a preform cutting device that can improve the cutting quality and efficiency of preforms with non-uniform thickness.

[0006] In a first aspect, embodiments of the present invention provide a control method for a precast body cutting device. The method is applied to a controller of the precast body cutting device. The precast body cutting device further includes a frame and a worktable, a pre-compression mechanism, and a shearing mechanism disposed on the frame. The worktable is used to place a non-uniform thickness precast body to be cut. The pre-compression mechanism includes a plurality of independently arranged pre-compression blocks and pressure sensors. Each independently arranged pre-compression block is connected to a pressure sensor. The independently arranged pre-compression blocks are used to pre-compress the non-uniform thickness precast body. The shearing mechanism is used to shear the pre-compressed non-uniform thickness precast body. The controller is electrically connected to the pressure sensors and the shearing mechanism respectively. The method includes: Obtain the material and structural parameters of precast structures with non-uniform thickness; Based on the material parameters and the structural parameters, the preload applied by each of the independent preload blocks to the non-uniform thickness precast body is determined; Based on the actual pre-pressure collected by each of the pressure sensors, the shearing force applied by the shearing mechanism to the non-uniform thickness preform is determined.

[0007] Secondly, embodiments of the present invention provide a control device for a precast body cutting equipment. The device is applied to the controller of the precast body cutting equipment. The precast body cutting equipment further includes a frame and a worktable, a pre-compression mechanism, and a shearing mechanism disposed on the frame. The worktable is used to place a non-uniform thickness precast body to be cut. The pre-compression mechanism includes a plurality of independently arranged pre-compression blocks and pressure sensors. Each independently arranged pre-compression block is connected to a pressure sensor. The independently arranged pre-compression blocks are used to pre-compress the non-uniform thickness precast body. The shearing mechanism is used to shear the pre-compressed non-uniform thickness precast body. The controller is electrically connected to the pressure sensors and the shearing mechanism respectively. The device includes: The acquisition module is used to acquire the material and structural parameters of precast bodies with non-uniform thickness. The first data processing module is used to determine the preload applied by each of the independent preload blocks to the non-uniform thickness precast body based on the material parameters and the structural parameters. The second data processing module is used to determine the shearing force applied by the shearing mechanism to the non-uniform thickness preform based on the actual pre-pressure collected by each of the pressure sensors.

[0008] Thirdly, embodiments of the present invention also provide an electronic device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the method described in any embodiment of the present invention.

[0009] Fourthly, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to perform the method described in any embodiment of the present invention.

[0010] This invention provides a control method and apparatus for a preform cutting device. First, a non-uniform thickness carbon fiber preform to be processed is placed on a worktable and positioned using positioning protrusions on the worktable to ensure that the area to be cut corresponds to the cutting blade position, and the area to be pre-compressed corresponds one-to-one with each independent pre-compressing block. Simultaneously, a thickness detection device detects the layup thickness of each pre-compressing area, a density detection device detects the yarn volume fraction of each pre-compressing area, an angle detection device detects the layup angle of each pre-compressing area, and an environmental sensor detects the temperature and humidity of the processing environment, calculating an environmental correction coefficient. The preload calculation module of the control system takes into account the elastic modulus, monofilament diameter, tensile strength, and interlacing coefficient of the carbon fiber yarn, the pressing area of ​​each independent preload block, the safety factor, and the friction coefficient between the yarn and the flexible buffer layer. It then calculates the preload of each independent preload block using a complex formula. Next, the drive assembly of the preload mechanism is activated, driving each independent preload block to move downwards synchronously until the flexible buffer layer at the bottom of each independent preload block contacts the surface of the carbon fiber preform. Subsequently, each drive assembly operates independently, pushing the corresponding preload block downwards according to the preset target preload, while pressure sensors continuously monitor the actual preload of each preload block. The drive components provide real-time feedback on the downward displacement data of each independent preloading block. When the actual preload of a certain independent preloading block reaches its preset target preload, the drive component corresponding to that independent preloading block stops working and maintains the current downward pressure state. This process continues until the actual preload of all independent preloading blocks reaches their respective target preloads, completing the preloading process. Simultaneously, the thickness correlation module of the control system is activated. Combining the preload calculation formula, the actual preload of each independent preloading block, and the downward displacement data, it reverse-engineers the approximate thickness of the corresponding area of ​​the precast body. Based on the preset linkage algorithm, it calculates the thickness of each area and the actual preload with precise matching. The cutting force of the equipped cutter is adjusted; after the pre-compression is completed and the cutting force is adjusted, the control system controls the shear drive component to start, and drives the cutter to move downward according to the adjusted cutting force to cut the pre-compressed carbon fiber preform; during the cutting process, the pressure sensor continuously detects the actual pre-compression of each independent pre-compression block, and the thickness correlation module updates the approximate thickness of the corresponding area of ​​the preform in real time. If there is a fluctuation in pre-compression (fluctuation amplitude exceeds ±5%) or a thickness deviation (deviation exceeds ±0.1mm), the shear force adjustment module inputs the linkage algorithm formula in real time to adjust the cutting force of the cutter to ensure that the cutting process is stable and the cutting quality meets the standards. Attached Figure Description

[0011] To more clearly illustrate the technical solutions 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A flowchart of a control method for a prefabricated cutting device according to one embodiment is shown; Figure 2 This is a hardware architecture diagram of an electronic device provided in an embodiment of the present invention; Figure 3 A structural diagram of the control device for a prefabricated body cutting device according to one embodiment is shown. Figure 4 This is a schematic diagram of the structure of a prefabricated body cutting device provided in an embodiment of the present invention; Figure 5 for Figure 4 A top view of the prefabricated body cutting equipment shown.

[0013] Figure label: 1-Rack; 11-Bearing plate; 2-Workbench; 21-Anti-slip mat layer; 22-Positioning protrusion; 3-Pre-compression mechanism; 31-Mounting bracket; 32 - Independent preload block; 33 - Pressure sensor; 34 - Flexible buffer layer; 4-Shearing Mechanism 41-Cut knife; 42-Cutter mounting base; 43-Shear drive component; 44 - Cutter guide assembly; 5-Control Mechanism Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0015] Please refer to Figure 1This invention provides a control method for a prefabricated body cutting device, comprising: Step 100: Obtain the material and structural parameters of the non-uniform thickness precast body; Step 102: Based on material and structural parameters, determine the preload applied by each individual preload block to the non-uniform thickness precast body; Step 104: Based on the actual pre-pressure collected by each pressure sensor, determine the shearing force applied by the shearing mechanism to the non-uniform thickness preform.

[0016] In this embodiment, the non-uniform thickness carbon fiber preform to be processed is first placed on the worktable and positioned using the positioning protrusions on the worktable to ensure that the area to be sheared on the preform corresponds to the position of the cutting blade, and the area to be pre-compressed corresponds one-to-one with each independent pre-compressing block. Simultaneously, the layup thickness of each pre-compressing area is detected by a thickness detection device, the yarn volume fraction of each pre-compressing area is detected by a density detection device, the layup angle of each pre-compressing area is detected by an angle detection device, and the temperature and humidity of the processing environment are detected by environmental sensors. An environmental correction coefficient is calculated, and the pre-compressing force calculation module of the control system is input... The elastic modulus, monofilament diameter, tensile strength, and interlacing coefficient of the carbon fiber yarn, the pressing area of ​​each independent pre-compression block, the safety factor, and the friction coefficient between the yarn and the flexible buffer layer are used to calculate the preload of each independent pre-compression block using a complex formula. Then, the drive assembly of the pre-compression mechanism is activated, driving each independent pre-compression block to move downwards synchronously until the flexible buffer layer at the bottom of each independent pre-compression block contacts the surface of the carbon fiber preform. Subsequently, each drive assembly works independently, pushing the corresponding pre-compression block downwards according to the preset target preload. Simultaneously, pressure sensors detect the actual preload of each pre-compression block in real time, and the drive assembly provides real-time feedback. The downward displacement data of the independent preloading blocks are used to determine when the actual preload of a certain independent preloading block reaches its preset target preload. At this point, the corresponding drive component stops working and maintains the current downward pressure state. This process continues until the actual preload of all independent preloading blocks reaches their respective target preloads, completing the preloading process. Simultaneously, the thickness correlation module of the control system is activated. Combining the preload calculation formula, the actual preload of each independent preloading block, and the downward displacement data, the approximate thickness of the corresponding area of ​​the precast body is derived. Based on the preset linkage algorithm, a cutting tool precisely matching the thickness and actual preload of each area is calculated. Cutting force; after pre-compression is completed and cutting force is adjusted, the control system controls the shear drive component to start, driving the cutter downward according to the adjusted cutting force to cut the pre-compressed carbon fiber preform; during the cutting process, the pressure sensor continuously detects the actual pre-compression of each independent pre-compression block, and the thickness correlation module updates the approximate thickness of the corresponding area of ​​the preform in real time. If there is a fluctuation in pre-compression (fluctuation amplitude exceeds ±5%) or a thickness deviation (deviation exceeds ±0.1mm), the shearing force adjustment module inputs the linkage algorithm formula in real time to adjust the cutting force of the cutter to ensure that the cutting process is stable and the cutting quality meets the standards.

[0017] In one embodiment of the present invention, the material parameters include yarn elastic modulus, yarn diameter, tensile strength and yarn interlacing coefficient, and the structural parameters include ply thickness, ply angle and yarn 3D weaving density.

[0018] In this embodiment, the elastic modulus of the yarn is determined according to the carbon fiber yarn type, with a conventional range of 220-250 GPa. The yarn diameter is determined by the yarn production parameters. The tensile strength is determined according to the yarn type. The interlacing coefficient reflects the tightness of the yarn interlacing and is determined by the weaving method and yarn count. The ply thickness is obtained by a thickness detection device. The ply angle is obtained by an angle detection device. The 3D weaving density of the yarn is determined by the weaving method (plain weave, twill weave, satin weave) and ply density of the carbon fiber preform.

[0019] In one embodiment of the present invention, the preload is determined by the following formula: In the formula, For pre-stress, For elastic modulus, The diameter of the yarn. Yarn volume fraction for each pre-compression zone h For the layer thickness, The pressure area of ​​a single, independent preload block. For the ply angle, The yarn interlacing coefficient, To calculate the environmental correction factor, For safety reasons, For tensile strength, is the coefficient of friction.

[0020] In this embodiment, the structure of the non-uniform thickness preform (layup thickness, yarn 3D weaving density, layup angle) and the yarn material properties (yarn elastic modulus, yarn diameter, yarn strength, yarn interlacing coefficient) are combined with environmental correction coefficients and layup angle correction coefficients. The target preload corresponding to each independent preload block is accurately calculated through a complex formula to ensure that the preload can make the surface of the carbon fiber preform flat and the yarn tightly arranged, without causing yarn compression deformation or obvious compression marks.

[0021] In one embodiment of the present invention, the shear force is determined by the following formula: In the formula: Shear force, The force linkage coefficient ( k The value ranges from 0.3 to 0.8, and can be adjusted according to the strength and processing precision of the carbon fiber yarn. The actual preload of the independent preload block. To derive the thickness, The base shear strength (preset based on the base thickness and yarn density of the carbon fiber preform).

[0022] In this embodiment, the thickness of the preform at different locations is derived through the thickness correlation module, and the actual pre-pressure signal of each independent pre-compression block is combined with the characteristics of carbon fiber yarn and processing requirements. According to the preset linkage algorithm, the shear force is calculated to accurately match the thickness and actual pre-pressure of each region. This ensures that the shear force is linked and matched with the preform thickness, pre-pressure, yarn characteristics, layup angle, and environmental conditions in multiple dimensions, thereby achieving accurate matching of the shear force with the layup thickness and pre-compression state at different locations of the non-uniform thickness preform.

[0023] In one embodiment of the present invention, the pressing speed of each individual preload block is controlled in the following manner: The initial downward speed is 5-10 mm / s; After the independent pre-compression block comes into contact with the surface of the precast body with non-uniform thickness, the pressing speed is adjusted to 1-3 mm / s; among which, when the pressing speed is 1-3 mm / s, the pressing speed is adjusted according to the layup angle.

[0024] In this embodiment, the pressing speed of the independent pre-compression block is adaptively adjusted in segments by the control system: during the unloaded rapid downward phase, the initial pressing speed is set to 5-10 mm / s; when the flexible buffer layer of the pre-compression block contacts the surface of the carbon fiber preform and triggers a slight pressure change signal, it automatically switches to the slow and steady pressing phase, with the reference pressing speed fixed at 1-3 mm / s, to avoid yarn misalignment and fuzzing caused by rapid pressing, while ensuring the accuracy of the pre-compression block pressing displacement data.

[0025] In one embodiment of the present invention, when the layup angle is greater than 0° and less than or equal to 30°, the pressing speed is 1-3 mm / s; When the ply angle is greater than 30° and less than or equal to 60°, adjust the pressing speed to 0.8-2.0 mm / s; When the layup angle is greater than 60°, the pressing speed is adjusted to 0.5-1.5 mm / s.

[0026] In this embodiment, when the layup angle is greater than 0° and less than or equal to 30°: the layup is relatively flat, the yarn interlacing stability is good, and the baseline slow speed of 1-3 mm / s remains unchanged; when the layup angle is greater than 30° and less than or equal to 60°: the layup angle increases, the yarn direction is inclined, and it is easy to slip and misalign, so the pressing speed is reduced to 0.8-2.0 mm / s; when the layup angle is greater than 60°, the pressing speed is adjusted to 0.5-1.5 mm / s: the layup is close to vertical arrangement, the yarn structure is the loosest, and the resistance to disturbance is the weakest, so the speed is further reduced by 0.5-1.0 mm / s on the basis of the baseline slow speed, and the final pressing speed is controlled to be 0.5-1.5 mm / s. By adjusting the speed in stages according to the layup angle, yarn slippage, fuzzing, and edge curling phenomena caused by excessively fast pressing of prefabricated bodies with large-angle layups can be avoided.

[0027] In one embodiment of the present invention, when the actual preload is not in the preset first pressure range or when the layup thickness is not in the preset first thickness range, the shearing mechanism is controlled to stop working and the shearing force is recalculated.

[0028] In this embodiment, if the actual preload of the independent preload block deviates from the target preload by more than ±8%, or the layup thickness deviates from the derived thickness by more than ±0.2mm, the control system first pauses the cutting, controls the drive component of the corresponding preload block to adjust the preload, re-derives the precast thickness and adjusts the cutting force until the deviation meets the requirements, and then restarts the cutting process to ensure the cutting quality.

[0029] like Figure 2 , Figure 3 As shown, this embodiment of the invention provides a control device for a prefabricated body cutting device. The device embodiment can be implemented through software, hardware, or a combination of both. From a hardware perspective, as... Figure 2 The diagram shown is a hardware architecture diagram of an electronic device containing the control device of a prefabricated body cutting equipment according to an embodiment of the present invention. Except for... Figure 2 In addition to the processor, memory, network interface, and non-volatile memory shown, the electronic device in the embodiment may also include other hardware, such as a forwarding chip responsible for processing packets. Taking software implementation as an example, such as... Figure 3 As shown, a device in a logical sense is formed by the CPU of the electronic device in which it is located reading the corresponding computer program from the non-volatile memory into the memory for execution.

[0030] like Figure 3 As shown, the control device for a prefabricated body cutting equipment provided in this embodiment includes: The acquisition module is used to acquire the material and structural parameters of precast bodies with non-uniform thickness. The first data processing module is used to determine the preload applied by each of the independent preload blocks to the non-uniform thickness precast body based on the material parameters and the structural parameters. The second data processing module is used to determine the shearing force applied by the shearing mechanism to the non-uniform thickness preform based on the actual pre-pressure collected by each of the pressure sensors.

[0031] In one embodiment of the present invention, the material parameters include yarn elastic modulus, yarn diameter, tensile strength and yarn interlacing coefficient, and the structural parameters include ply thickness, ply angle and yarn 3D weaving density.

[0032] In this embodiment, the elastic modulus of the yarn is determined according to the carbon fiber yarn type, with a conventional range of 220-250 GPa. The yarn diameter is determined by the yarn production parameters. The tensile strength is determined according to the yarn type. The interlacing coefficient reflects the tightness of the yarn interlacing and is determined by the weaving method and yarn count. The ply thickness is obtained by a thickness detection device. The ply angle is obtained by an angle detection device. The 3D weaving density of the yarn is determined by the weaving method (plain weave, twill weave, satin weave) and ply density of the carbon fiber preform.

[0033] In one embodiment of the present invention, the preload is determined by the following formula: In the formula, For pre-stress, For elastic modulus, The diameter of the yarn. Yarn volume fraction for each pre-compression zone h For the layer thickness, The pressure area of ​​a single, independent preload block. For the ply angle, The yarn interlacing coefficient, To calculate the environmental correction factor, For safety reasons, For tensile strength, is the coefficient of friction.

[0034] In this embodiment, the structure of the non-uniform thickness preform (layup thickness, yarn 3D weaving density, layup angle) and the yarn material properties (yarn elastic modulus, yarn diameter, yarn strength, yarn interlacing coefficient) are combined with environmental correction coefficients and layup angle correction coefficients. The target preload corresponding to each independent preload block is accurately calculated through a complex formula to ensure that the preload can make the surface of the carbon fiber preform flat and the yarn tightly arranged, without causing yarn compression deformation or obvious compression marks.

[0035] In one embodiment of the present invention, the shear force is determined by the following formula: In the formula: Shear force, The force linkage coefficient ( k The value ranges from 0.3 to 0.8, and can be adjusted according to the strength and processing precision of the carbon fiber yarn. The actual preload of the independent preload block. To derive the thickness, The base shear strength (preset based on the base thickness and yarn density of the carbon fiber preform).

[0036] In this embodiment, the thickness of the preform at different locations is derived through the thickness correlation module, and the actual pre-pressure signal of each independent pre-compression block is combined with the characteristics of carbon fiber yarn and processing requirements. According to the preset linkage algorithm, the shear force is calculated to accurately match the thickness and actual pre-pressure of each region. This ensures that the shear force is linked and matched with the preform thickness, pre-pressure, yarn characteristics, layup angle, and environmental conditions in multiple dimensions, thereby achieving accurate matching of the shear force with the layup thickness and pre-compression state at different locations of the non-uniform thickness preform.

[0037] In one embodiment of the present invention, the pressing speed of each individual preload block is controlled in the following manner: The initial downward speed is 5-10 mm / s; After the independent pre-compression block comes into contact with the surface of the non-uniform thickness precast body, the pressing speed is adjusted to 1-3 mm / s; wherein, when the pressing speed is 1-3 mm / s, the pressing speed is adjusted according to the layup angle.

[0038] In this embodiment, the pressing speed of the independent pre-compression block is adaptively adjusted in segments by the control system: during the unloaded rapid downward phase, the initial pressing speed is set to 5-10 mm / s; when the flexible buffer layer of the pre-compression block contacts the surface of the carbon fiber preform and triggers a slight pressure change signal, it automatically switches to the slow and steady pressing phase, with the reference pressing speed fixed at 1-3 mm / s, to avoid yarn misalignment and fuzzing caused by rapid pressing, while ensuring the accuracy of the pre-compression block pressing displacement data.

[0039] In one embodiment of the present invention, when the layup angle is greater than 0° and less than or equal to 30°, the pressing speed is adjusted to 1-3 mm / s; When the layup angle is greater than 30° and less than or equal to 60°, the pressing speed is adjusted to 0.8-2.0 mm / s; When the layup angle is greater than 60°, the pressing speed is adjusted to 0.5-1.5 mm / s.

[0040] In this embodiment, when the layup angle is greater than 0° and less than or equal to 30°: the layup is relatively flat, the yarn interlacing stability is good, and the baseline slow speed of 1-3 mm / s remains unchanged; when the layup angle is greater than 30° and less than or equal to 60°: the layup angle increases, the yarn direction is inclined, and it is easy to slip and misalign, so the pressing speed is reduced to 0.8-2.0 mm / s; when the layup angle is greater than 60°, the pressing speed is adjusted to 0.5-1.5 mm / s: the layup is close to vertical arrangement, the yarn structure is the loosest, and the resistance to disturbance is the weakest, so the speed is further reduced by 0.5-1.0 mm / s on the basis of the baseline slow speed, and the final pressing speed is controlled to be 0.5-1.5 mm / s. By adjusting the speed in stages according to the layup angle, yarn slippage, fuzzing, and edge curling phenomena caused by excessively fast pressing of prefabricated bodies with large-angle layups can be avoided.

[0041] In one embodiment of the present invention, when the actual preload is not in the preset first pressure range or when the layup thickness is not in the preset first thickness range, the shearing mechanism is controlled to stop working and the shearing force is recalculated.

[0042] In this embodiment, if the actual preload of the independent preload block deviates from the target preload by more than ±8%, or the layup thickness deviates from the derived thickness by more than ±0.2mm, the control system first pauses the cutting, controls the drive component of the corresponding preload block to adjust the preload, re-derives the precast thickness and adjusts the cutting force until the deviation meets the requirements, and then restarts the cutting process to ensure the cutting quality.

[0043] like Figure 4 , Figure 5As shown, this embodiment provides a preform cutting device, including a frame, a worktable, a pre-compression mechanism, a shearing mechanism, and a control system. The worktable is fixed on the frame, and the surface of the worktable is provided with an anti-slip pad layer. The anti-slip pad layer is provided with positioning protrusions for positioning the carbon fiber preform and preventing displacement of the carbon fiber preform during pre-compression and shearing. The pre-compression mechanism and the shearing mechanism are both mounted on the frame and located above the worktable. The control system is electrically connected to the pre-compression mechanism and the shearing mechanism respectively, and is used to control the pre-compression mechanism and the shearing mechanism to work together. The control system has a built-in pre-pressure setting module, a pre-pressure calculation module, a thickness correlation module, and a shearing force adjustment module. The pre-compression mechanism includes a mounting frame, multiple independent pre-compression blocks, a drive assembly, and a pressure detection assembly. The mounting frame is fixed to the machine frame. In this embodiment, there are 6 pre-compression blocks arranged in a 2×3 matrix or in a straight line below the mounting frame. Each pre-compression block corresponds to a pre-compression area of ​​the carbon fiber preform to be processed. The drive assembly uses servo hydraulic cylinders. Each independent pre-compression block is connected to the mounting frame through a servo hydraulic cylinder to ensure independent drive and precise displacement control of each independent pre-compression block. At the same time, the servo hydraulic cylinder can provide real-time feedback on the downward displacement data of the pre-compression block. The pressure detection assembly includes 6 miniature pressure sensors. Each pressure sensor is embedded in the mounting groove at the bottom of a pre-compression block. The bottom of the pre-compression block has a 1mm thick flexible silicone buffer layer. The detection surface of the pressure sensor is flush with the lower surface of the flexible buffer layer, which is used to detect the pre-pressure of the corresponding pre-compression block on the carbon fiber preform in real time and transmit the pressure signal to the control system. The shearing mechanism includes a cutter, a cutter mounting base, a shearing drive assembly, and a cutter guide assembly. The cutter is fixed on the cutter mounting base. The shearing drive assembly, using a servo motor and ball screw structure, is connected to the cutter mounting base and drives the cutter to move up and down to shear the carbon fiber preform. The shearing drive assembly is electrically connected to the control system and can adjust the shearing force of the cutter according to the control system's instructions. The cutter guide assembly includes a guide rod and a guide sleeve. The guide rod is fixed on the cutter mounting base, and the guide sleeve is fixed on the frame. The guide rod and guide sleeve slide together to ensure the stability of the cutter during up and down movement. The preload is determined by a complex formula. The thickness correlation module combines this formula, the actual preload detected by the pressure sensor, and the downward displacement data fed back by the servo hydraulic cylinder to deduce the approximate thickness of the corresponding area of ​​the preform.

[0044] For example, the non-uniform thickness carbon fiber preform (T300 type carbon fiber yarn plain weave, overall thickness range of 5-15mm) to be processed is placed on the anti-slip pad layer of the workbench and positioned by positioning protrusions to ensure that the area to be cut on the carbon fiber preform corresponds to the position of the cutting blade, and the 6 pre-compression areas correspond one-to-one with 6 pre-compression blocks; at the same time, the actual thickness of each pre-compression area is detected by a thickness detection device. (Detection accuracy ±0.01mm), the yarn volume fraction of each pre-compression zone is detected using a density detection device. The layup angle of each preloading zone is detected by an angle detection device. The environmental sensors detected the processing environment temperature as 25℃ and the humidity as 55%RH, and calculated the environmental correction factor. All detection data is transmitted to the control system; the detection data is as follows: for areas with a thickness of 5-8mm, , ; Area with a thickness of 8-12mm, , Areas with a thickness of 12-15mm , ; Input through the pre-pressure calculation module of the control system , , , , , , By complicating the formula Calculate the target preload for each region (using the median value for each thickness region): Thickness range of 5-8mm (take the middle value) , ): ; Thickness range of 8-12mm (take the middle value) , ): ; Thickness range of 12-15mm (take the middle value) , , Adjusted to 1.4): ; The pre-pressure setting module presets the calculated target pre-pressure to ensure that the surface of each area of ​​the carbon fiber preform is flat, the yarn is tightly arranged, and there are no obvious compression marks after pre-pressure. The control system controls the six servo hydraulic cylinders of the pre-pressure mechanism to start synchronously, driving the six pre-pressure blocks to move downwards at an initial speed of 8 mm / s until the silicone flexible buffer layer at the bottom of the pre-pressure block contacts the surface of the carbon fiber preform. Subsequently, each servo hydraulic cylinder works independently, adjusting the pressing speed to 2 mm / s (1.5 mm / s for the 12-15 mm thickness area), pushing the corresponding pre-pressure block to continue pressing down according to the preset target pre-pressure. At the same time, the pressure sensor detects the actual pre-pressure of each pre-pressure block in real time, and the servo hydraulic cylinders provide real-time feedback on the pressing displacement data of the pre-pressure blocks. Both are transmitted synchronously to the control system. When the actual pre-pressure of a certain pre-pressure block reaches its preset target pre-pressure, the control system controls the corresponding servo hydraulic cylinder of that pre-pressure block to... The cylinder stops working, and the pre-compression block remains in its current downward pressure state. The pre-compression process is complete when the actual pre-pressure of all six pre-compression blocks reaches their respective target pre-pressure (deviation less than ±8%). Simultaneously, the thickness correlation module of the control system is activated. Combining the pre-pressure calculation formula, the actual pre-pressure of each pre-compression block, the downward displacement data fed back by the servo hydraulic cylinder, and the input known parameters, it reverse-engineers the approximate thickness of the corresponding regions of precast body 6: the thickness of the 5-8mm region is approximately 6.4-6.6mm, the thickness of the 8-12mm region is approximately 9.8-10.2mm, and the thickness of the 12-15mm region is approximately 13.3-13.7mm. This information is transmitted to the shearing force adjustment module. The shearing force adjustment module of the control system receives the approximate thickness of the precast body at different locations transmitted by the thickness correlation module, as well as the actual pre-pressure signals transmitted by each pressure sensor. Based on the complex formula of the linkage algorithm... (in , ), calculate the cutting force of the cutter corresponding to each pre-compression zone: Thickness 5-8mm area ( , ): ; Thickness 8-12mm area ( , ): ; Thickness 12-15mm area ( , ): ; After pre-compression is completed and the cutting force is adjusted, the control system controls the shear drive component to start, driving the cutter downward according to the adjusted cutting force to cut the pre-compressed carbon fiber preform. During the cutting process, the pressure sensor continuously detects the actual pre-compression force of each pre-compression block, and the thickness correlation module updates the approximate thickness of the corresponding area of ​​the preform in real time. If the actual pre-compression force fluctuation of a certain area of ​​the pre-compression block exceeds ±5%, or the derived thickness deviation exceeds ±0.1mm, the shear force adjustment module immediately substitutes the linkage algorithm formula to adjust the cutting force of the cutter in the corresponding area to ensure the stability of the cutting process. After the cutting is completed, the control system controls the cutter and all pre-compression blocks to synchronously reset upward, and removes the processed carbon fiber preform, completing one cutting process.

[0045] Those skilled in the art are familiar with these structures, so they will not be described or illustrated here.

[0046] It is understood that the structures illustrated in the embodiments of the present invention do not constitute a specific limitation on the control device of a prefabricated cutting device. In other embodiments of the present invention, the control device of a prefabricated cutting device may include more or fewer components than illustrated, or combine some components, or split some components, or arrange different components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0047] The information interaction and execution process between the modules in the above-mentioned device are based on the same concept as the method embodiment of the present invention, and the specific details can be found in the description of the method embodiment of the present invention, and will not be repeated here.

[0048] This invention also provides an electronic device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements a control method for a prefabricated body cutting device according to any embodiment of this invention.

[0049] This invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform a control method for a prefabricated cutting device according to any embodiment of this invention.

[0050] Specifically, a system or apparatus equipped with a storage medium may be provided, on which software program code implementing the functions of any of the embodiments described above is stored, and the computer (or CPU or Mpu) of the system or apparatus may read and execute the program code stored in the storage medium.

[0051] In this case, the program code read from the storage medium can itself implement the function of any of the above embodiments, and therefore the program code and the storage medium storing the program code constitute part of the present invention.

[0052] Examples of storage media used to provide program code include floppy disks, hard disks, magneto-optical disks, optical disks (such as Cd-ROM, Cd-R, Cd-Rw, DVD-ROM, DVD-Ram, DVD-Rw, DVD+Rw), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, program code can be downloaded from a server computer via a communication network.

[0053] Furthermore, it should be clear that not only can the program code read by the computer be executed, but also the operating system or other components operating on the computer can be instructed based on the program code to perform some or all of the actual operations, thereby realizing the function of any of the embodiments described above.

[0054] Furthermore, it is understood that the program code read from the storage medium is written to the memory set in the expansion board inserted into the computer or to the memory set in the expansion module connected to the computer. Then, based on the instructions of the program code, the CPU or other device installed on the expansion board or expansion module executes some and all of the actual operations, thereby realizing the function of any of the embodiments described above.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0056] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as ROM, RAM, magnetic disk, or optical disk.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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; and these 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 the present invention.

Claims

1. A control method for a prefabricated body cutting device, characterized in that, The method is applied to the controller of a precast body cutting equipment. The precast body cutting equipment further includes a frame and a worktable, a pre-compression mechanism, and a shearing mechanism disposed on the frame. The worktable is used to place non-uniform thickness precast bodies to be cut. The pre-compression mechanism includes multiple independent pre-compression blocks and pressure sensors arranged in sequence. Each independent pre-compression block is connected to a pressure sensor. The independent pre-compression blocks are used to pre-compress the non-uniform thickness precast bodies. The shearing mechanism is used to shear the pre-compressed non-uniform thickness precast bodies. The controller is electrically connected to the pressure sensors and the shearing mechanism respectively. The method includes: Obtain the material and structural parameters of precast structures with non-uniform thickness; Based on the material parameters and the structural parameters, the preload applied by each of the independent preload blocks to the non-uniform thickness precast body is determined; Based on the actual pre-pressure collected by each of the pressure sensors, the shearing force applied by the shearing mechanism to the non-uniform thickness preform is determined.

2. The method according to claim 1, characterized in that, The material parameters include yarn elastic modulus, yarn diameter, tensile strength, and yarn interlacing coefficient, and the structural parameters include ply thickness, ply angle, and yarn 3D weaving density.

3. The method according to claim 1, characterized in that, The preload is determined by the following formula: In the formula, For pre-stress, For elastic modulus, The diameter of the yarn. Yarn volume fraction for each pre-compression zone h For the layer thickness, The pressure area of ​​a single, independent preload block. For the ply angle, The yarn interlacing coefficient, To calculate the environmental correction factor, For safety reasons, For tensile strength, is the coefficient of friction.

4. The method according to claim 3, characterized in that, The shear force is determined by the following formula: In the formula: Shear force, The force linkage coefficient ( k The value ranges from 0.3 to 0.8, and can be adjusted according to the strength and processing precision of the carbon fiber yarn. The actual preload of the independent preload block. To derive the thickness, The base shear strength (preset based on the base thickness and yarn density of the carbon fiber preform).

5. The method according to claim 4, characterized in that, The pressing speed of each individual preload block is controlled in the following manner: The initial downward speed is 5-10 mm / s; After the independent pre-compression block comes into contact with the surface of the non-uniform thickness precast body, the pressing speed is adjusted to 1-3 mm / s; wherein, when the pressing speed is 1-3 mm / s, the pressing speed is adjusted according to the layup angle.

6. The method according to claim 5, characterized in that, Adjusting the pressing speed according to the ply angle includes: When the layup angle is greater than 0° and less than or equal to 30°, the pressing speed is adjusted to 1-3 mm / s; When the layup angle is greater than 30° and less than or equal to 60°, the pressing speed is adjusted to 0.8-2.0 mm / s; When the layup angle is greater than 60°, the pressing speed is adjusted to 0.5-1.5 mm / s.

7. The method according to any one of claims 2-6, characterized in that, When the actual preload is not in the preset first pressure range or when the layup thickness is not in the preset first thickness range, the shearing mechanism is controlled to stop working and the shearing force is recalculated.

8. A control device for a prefabricated body cutting equipment, characterized in that, The device is used as a controller for a precast body cutting equipment. The precast body cutting equipment also includes a frame and a worktable, a pre-compression mechanism, and a shearing mechanism mounted on the frame. The worktable is used to place precast bodies of varying thicknesses to be cut. The pre-compression mechanism includes multiple independent pre-compression blocks and pressure sensors arranged in sequence. Each independent pre-compression block is connected to a pressure sensor. The independent pre-compression blocks are used to pre-compress the precast bodies of varying thicknesses. The shearing mechanism is used to shear the pre-compressed precast bodies of varying thicknesses. The controller is electrically connected to the pressure sensors and the shearing mechanism, respectively. The device includes: The acquisition module is used to acquire the material and structural parameters of precast bodies with non-uniform thickness. The first data processing module is used to determine the preload applied by each of the independent preload blocks to the non-uniform thickness precast body based on the material parameters and the structural parameters. The second data processing module is used to determine the shearing force applied by the shearing mechanism to the non-uniform thickness preform based on the actual pre-pressure collected by each of the pressure sensors.

9. An electronic device, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, It stores a computer program that, when executed in a computer, causes the computer to perform the method described in any one of claims 1-7.

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