CN115270426A - Stamping springback compensation control method - Google Patents
Stamping springback compensation control method Download PDFInfo
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- CN115270426A CN115270426A CN202210798551.1A CN202210798551A CN115270426A CN 115270426 A CN115270426 A CN 115270426A CN 202210798551 A CN202210798551 A CN 202210798551A CN 115270426 A CN115270426 A CN 115270426A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/001—Shaping combined with punching, e.g. stamping and perforating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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Abstract
The invention relates to the technical field of stamping control, in particular to a stamping springback compensation control method, which comprises the steps of firstly modeling a stamping die, carrying out simulation stamping on a part by using the stamping die model, carrying out preliminary springback compensation on the die model when a simulation stamping result meets set springback compensation conditions, carrying out fine springback compensation on the stamping die model subjected to the preliminary springback compensation according to a preliminary springback compensation result, and outputting a standard springback compensation strategy according to the fine springback compensation result, so that the die production is guided, the manufacturing period of the stamping die is shortened, the technical problem that the die is required to be manually repaired for many times according to the stamping state of the part due to the characteristic springback of a part material when the stamping is carried out by using the die produced by the prior art is solved, the efficiency is not high, and the precision of the stamped part can be improved by using the standard springback compensation strategy.
Description
Technical Field
The invention relates to the technical field of stamping control, in particular to a stamping springback compensation control method.
Background
Along with the acceleration of automobile updating speed and the continuous improvement of automobile body required precision, stamping die is as the important frock of white automobile body manufacturing, has all proposed higher requirement to its manufacturing cycle and quality, wherein the punching press resilience is the main factor that influences manufacturing cycle and panel beating quality, and along with the continuous deepening of automobile lightweight demand, part molding complexity increases, and the characteristic resilience of part material itself, need repair the mould many times to the mould, especially the large amount of applications of high strength board, lead to the mould manufacturing efficiency not high, the part precision is low.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a stamping springback compensation control method, and aims to solve the technical problems that when a part is stamped in the prior art, due to the characteristic springback of a part material, a die needs to be manually repaired for many times according to the stamping state of the part, the manufacturing efficiency of the die is low, and the precision of the part is low.
In order to achieve the above object, the present invention provides a punch rebound compensation control method, comprising the steps of:
modeling based on the structure diagram of the stamping die to obtain a stamping die model;
performing simulation stamping on the part by using the stamping die model to obtain a simulation stamping result;
when the simulation stamping result meets a preset springback condition, performing primary springback compensation on the stamping die model subjected to simulation stamping to obtain a stamping die model subjected to primary springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to primary springback compensation processing to obtain a primary springback compensation result;
when the initial rebound compensation result is smaller than a preset initial rebound compensation error, setting a die adjusting reference point according to the initial rebound compensation result, and acquiring the type of a die;
setting mold symbol information based on the mold category;
performing fine springback compensation on the stamping die model subjected to the preliminary springback compensation based on the die adjustment datum point and the die pattern information to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result;
and generating a target stamping springback compensation guide file when the fine springback compensation result meets a preset springback compensation condition.
Optionally, the mold signature information includes forming mold signature information and trimming and punching mold signature information;
the stamping die model after preliminary springback compensation is carried out meticulous springback compensation based on accent mould benchmark and mould symbol information, obtains the stamping die model after meticulous springback compensation is handled to according to the stamping die model after meticulous springback compensation is handled carries out the simulation punching press to the part, obtains meticulous springback compensation result, includes:
when the type of the die is a forming die, setting a die surface, a symbol area and a hollow area of the forming die according to the model structure of the stamping die after the initial springback compensation and the part positioning requirement;
taking the die surface, the symbol area and the hollowed area of the forming die as the symbol information of the forming die;
carrying out forming symbol verification on the preliminary springback compensation result through the die adjusting reference point and the forming type die symbol information to obtain a forming type die symbol result;
when the forming die symbol result is smaller than the forming die symbol error, obtaining a stamping die model after the forming die symbol processing;
and performing fine springback compensation on the stamping die model subjected to the shaping die symbol processing through the die adjusting reference point and the shaping die symbol information to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result.
Optionally, before obtaining a fine springback compensation result, the performing fine springback compensation on the stamping die model after the shaping die symbol processing through the die adjustment reference point and the shaping die symbol information to obtain the stamping die model after the fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model after the fine springback compensation processing, further includes:
setting a die surface, a symbol area and a hollow area of the trimming and punching die according to the punching die model structure after the initial springback compensation and the part positioning requirement;
taking the die surface, the symbol area and the hollowed area of the trimming and punching die as symbol information of the trimming and punching die;
performing trimming symbol verification on the preliminary springback compensation result through the die adjusting reference point and the trimming and punching die symbol information to obtain a trimming and punching die symbol result;
when the symbol result of the trimming and punching die is smaller than the symbol error of the trimming and punching die, acquiring a punching die model after the symbol processing of the trimming and punching die;
and performing fine springback compensation on the stamping die model subjected to the symbol processing of the trimming and punching die through the die adjusting reference point and the symbol information of the trimming and punching die to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result.
Optionally, the performing preliminary springback compensation on the stamping die model after the simulated stamping to obtain the stamping die model after the preliminary springback compensation processing, and performing simulation stamping on the part according to the stamping die model after the preliminary springback compensation processing to obtain a preliminary springback compensation result, further includes:
adjusting a primary springback compensation strategy and a primary springback compensation coefficient;
and performing preliminary springback compensation on the stamping die model according to the adjusted preliminary springback compensation strategy and the adjusted preliminary springback compensation coefficient to obtain the stamping die model after the preliminary springback compensation treatment, and performing simulation stamping on the part according to the stamping die model after the preliminary springback compensation treatment to obtain a preliminary springback compensation result.
Optionally, after the step of performing simulation stamping on the part by using the stamping die model to obtain a simulation stamping result, the method further includes:
when the simulation stamping result does not meet the preset springback compensation condition, adjusting a stamping process strategy to obtain a preset stamping process strategy;
and carrying out simulation stamping on the part through the preset stamping process strategy, wherein the preset stamping process strategy comprises the following steps: drawing, forming, material clamping and flanging, adjusting process modeling and adjusting processing pressure.
Optionally, the setting a reference point for adjusting a mode according to the preliminary compensation result includes:
acquiring a rebound stable area of each procedure according to the initial rebound compensation result;
and setting a die adjustment reference point based on the rebound stable area of each process.
Optionally, when the fine springback compensation result meets a preset springback compensation condition, generating a target stamping springback compensation instruction file includes:
when the fine springback compensation result is smaller than a preset fine springback compensation error, acquiring a springback compensation result corresponding to a springback compensation strategy;
generating a springback compensation instruction file according to the springback compensation strategy and a springback compensation result corresponding to the springback compensation strategy;
acquiring forming die symbolic information and trimming and punching die symbolic information;
generating a mold symbolic instruction file according to the forming mold symbolic information and the trimming and punching mold symbolic information;
acquiring the information of the reference point of the mode adjustment in each procedure;
generating a mould adjusting guide file according to the mould adjusting datum point information of each procedure;
and generating a target stamping springback compensation instruction file according to the springback compensation instruction file, the mould symbolic type instruction file and the mould adjusting instruction file.
The invention discloses a stamping springback compensation control method, which comprises the following steps: modeling based on the structure diagram of the stamping die to obtain a stamping die model; performing simulation stamping on the part by using the stamping die model to obtain a simulation stamping result; when the simulation stamping result meets a preset springback condition, performing preliminary springback compensation on the stamping die model subjected to simulation stamping to obtain a stamping die model subjected to preliminary springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to preliminary springback compensation processing to obtain a preliminary springback compensation result; when the initial resilience compensation result is smaller than a preset initial resilience compensation error, setting a die adjusting reference point according to the initial resilience compensation result, and acquiring the type of the die; setting mold symbol information based on the mold category; performing fine springback compensation on the stamping die model subjected to the preliminary springback compensation based on the die adjustment datum point and the die pattern information to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result; when the fine springback compensation result meets the preset springback compensation condition, a target stamping springback compensation guide file is generated, and compared with the traditional technology that a die is manually repaired according to the stamping state of a part, the method comprises the steps of firstly modeling a stamping die, carrying out simulation stamping on the part by using a stamping die model, carrying out preliminary springback compensation on the die model when the simulation stamping result meets the set springback compensation condition, carrying out fine springback compensation on the stamping die model after the preliminary springback compensation according to the preliminary springback compensation result, and outputting a standard springback compensation strategy according to the fine springback compensation result, so that the production of the die is guided, the manufacturing period of the stamping die is shortened, and the technical problem of low efficiency caused by the fact that the characteristic of a part material is rebounded when the stamping die is produced by using a production die in the prior art is avoided, the die is manually repaired according to the stamping state of the part for multiple times, and the precision of the stamped part can be improved by using the standard springback compensation strategy.
Drawings
FIG. 1 is a schematic flow chart illustrating a first exemplary embodiment of a method for controlling punch rebound compensation according to the present invention;
FIG. 2 is a schematic diagram illustrating a preliminary springback compensation process of an embodiment of the stamping springback compensation control method of the present invention;
FIG. 3 is a schematic flow chart illustrating a second embodiment of the impact resilience compensation control method according to the present invention;
FIG. 4 is a schematic diagram illustrating a verification process of a forming pattern in fine springback compensation according to an embodiment of the method for controlling punch springback compensation of the present invention;
FIG. 5 is a schematic diagram illustrating a verification process of edge trimming symbol type in fine springback compensation according to an embodiment of the method for controlling stamping springback compensation of the present invention;
FIG. 6 is a schematic diagram illustrating a final fine springback compensation process in the fine springback compensation according to an embodiment of the stamping springback compensation control method of the present invention;
FIG. 7 is a flowchart illustrating a third exemplary embodiment of a punch rebound compensation control method according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a stamping springback compensation control method, and referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of the stamping springback compensation control method.
In this embodiment, the stamping springback compensation control method includes the following steps:
step S10: and modeling based on the structure diagram of the stamping die to obtain a stamping die model.
It should be noted that the execution subject of the method of this embodiment may be a device with simulation software having data transmission, data acquisition, and data processing functions, for example: the present embodiment is not limited to this, and in the present embodiment and the following embodiments, the test device will be taken as an example for description.
It should be noted that the stamping die structure diagram may be a CAD structure diagram, and may also be another type of die structure diagram, which is not specifically limited by the embodiment.
In addition, before the stamping die model is established, the drawing ribs used on the drawing die can be modeled, converted into solid ribs, led into stamping simulation software and arranged on the corresponding blank holder die surface and the upper die surface, so that the condition of the blank holder die is more close to the actual die state, and the simulation result is more accurate.
It is understood that the stamping die structure pattern may include: the tool body die surface information, the work content, the pressure state and the like of each process, so that when simulation is carried out through the stamping simulation software or the stamping simulation program, the specific operation logic of the whole process analysis can be set according to the tool body die surface information, the work content, the pressure state and the like of each process.
In the concrete implementation, after the stamping die model is obtained, the placing posture of the stamping part can be adjusted according to the state of the physical inspection device, namely, the placing posture of the part is rotated to the state of the physical inspection device in the stamping simulation software based on the state of the physical inspection device.
It should be noted that, after the step of obtaining the stamping die model by modeling based on the stamping die structure pattern, the method further includes: extracting a reference point of the positioning hole and the checking fixture; and supporting or supporting the positioning hole and the reference point of the checking tool through a springback operation interface in the stamping simulation software, and adding part gravity calculation to improve the accuracy of the simulation result.
Step S20: and carrying out simulation stamping on the part by using the stamping die model to obtain a simulation stamping result.
It should be understood that the simulation punching result refers to a part springback result obtained after simulation punching is performed on a part by using a punching die model, and the simulation punching result is compared with a preset springback condition so as to facilitate punching springback of the part subsequently.
Step S30: and when the simulation punching result meets the preset resilience condition, carrying out preliminary resilience compensation on the punching die model after the simulation punching to obtain the punching die model after the preliminary resilience compensation processing, and carrying out simulation punching on the part according to the punching die model after the preliminary resilience compensation processing to obtain a preliminary resilience compensation result.
The preset springback condition refers to a minimum springback requirement value preset by a user, wherein the preset springback condition is related to the shape and size information of a part to be stamped, historical similar parts and the like, namely the minimum springback requirement value depends on the shape and size information of the part to be stamped, in a specific operation process, the larger the minimum springback requirement value is, the simpler the shape of the part with a larger size is, the larger the minimum springback requirement value is, the more the part with a smaller size is, and the more the shape of the part with a smaller size is, the smaller the minimum springback requirement value is, and the finer the minimum springback requirement value is.
For example: the minimum rebound requirement value can be set to be +/-3.0 mm facing a large part with the long side of the part expansion size larger than 600 mm; the minimum springback requirement value can be set to be +/-1.0 mm facing the small part with the long side of the part expansion size being smaller than 600mm, and the embodiment does not specifically limit the minimum springback requirement value.
Further, the method for performing the simulation stamping on the part by using the stamping die model further includes the following steps after obtaining a simulation stamping result: when the simulation stamping does not meet the preset springback compensation condition, adjusting the stamping process strategy to obtain a preset stamping process strategy; and carrying out simulation stamping on the part through the preset stamping process strategy, wherein the preset stamping process strategy comprises the following steps: drawing, forming, material clamping and flanging, adjusting process modeling and adjusting processing pressure.
When the simulation stamping result does not meet the minimum resilience requirement, adjusting the stamping process strategy, wherein the preset stamping process strategy comprises the following steps: parts are drawn in place as much as possible, drawn and pulled through, plastic strain is improved, and thinning rate is improved; adjusting the forming shape; under the condition of requirement, the flanging is changed into material clamping flanging, so that the deformation of the flanging area is strengthened; adding a model on a process supplement surface or a product non-overlapping area, improving the thinning rate and effectively reducing the rebound quantity, wherein the product design change is required for adding the model on the product non-overlapping area; the part with the flanging is drawn to the position as far as possible without increasing the cost of the die, the flanging amount (the flanging position is changed into the side trimming) is reduced, and the like, and other strategies for adjusting the stamping process can be included, which is not particularly limited in this embodiment.
It should be noted that the preliminary springback compensation for the press die model may include: full profile compensation, local compensation etc. select suitable resilience compensation coefficient, through suitable resilience compensation coefficient to the stamping die model after the simulation punching press preliminary resilience compensation, obtain the stamping die model after preliminary resilience compensation is handled to stamping die model after handling through preliminary resilience compensation carries out the simulation punching press to the part, obtains preliminary resilience compensation result.
In specific implementation, referring to fig. 2, if the simulation stamping result does not satisfy the preset springback condition, that is, the simulation stamping result does not satisfy the minimum springback requirement value, the initial springback amount may be reduced by refining the process scheme, so as to reduce the stamping compensation amount.
Step S40: and when the initial resilience compensation result is smaller than a preset initial resilience compensation error, setting a die adjusting reference point according to the initial resilience compensation result, and acquiring the type of the die.
It should be noted that the preset initial springback compensation error may be-0.5 mm to 0.5mm, and other error intervals may also be set according to different shapes or sizes of the parts, which is not specifically limited in this embodiment.
In concrete implementation, when the initial springback compensation result is between-0.5 mm and 0.5mm, the die adjustment reference point can be set according to the initial springback compensation result, and further, the step of setting the die adjustment reference point according to the initial springback compensation result comprises the following steps: acquiring a rebound stable area of each procedure according to the initial rebound compensation result; and setting a mold adjusting reference point based on the rebound stable area of each process.
In specific implementation, the die adjustment datum point can be preliminarily set in the region where the springback of all the working procedures is stable according to the preliminary springback compensation result, specifically, the region where the springback variation is within +/-0.2 mm, and the die adjustment datum point is set as the support on the springback calculation interface. When preliminary resilience compensation result is less than predetermineeing preliminary resilience compensation error, can set up accent mould benchmark and mould classification according to preliminary resilience compensation result to carry out meticulous resilience compensation to the stamping die model after preliminary resilience compensation is handled through transferring mould benchmark and mould classification, meticulous resilience compensation specifically includes: the present embodiment is not particularly limited to the shaping symbol verification, trimming symbol verification, and final fine springback compensation.
It should be understood that the die category includes forming dies and trimming and punching dies, and the die adjustment datum point may be a die adjustment datum point initially set by a user in an area where all processes are stable in rebound, for example: the region where the amount of change in springback is within ± 0.2mm, which is not particularly limited in this embodiment.
Step S50: and setting the mold symbol information based on the mold category.
The mold pattern information includes molding pattern information and piercing pattern information, and the mold pattern information may be set according to the mold type.
Step S60: and carrying out fine springback compensation on the stamping die model subjected to the preliminary springback compensation based on the die adjusting datum point and the die symbol information to obtain a stamping die model subjected to fine springback compensation processing, and carrying out simulation stamping on the part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result.
In this embodiment, after the die adjustment reference point is set, the forming signature verification and the trimming punching signature verification may be performed on the preliminary springback compensation result according to the die adjustment reference point, the forming signature information and the trimming punching signature information, and final fine springback compensation may be performed on the stamping die model after the forming signature verification and the trimming punching signature verification, so as to obtain a stamping die model after fine springback compensation processing, and the simulation stamping may be performed on the part through the stamping die model after the fine springback compensation processing, so as to obtain a fine springback compensation result.
Step S70: and generating a target stamping springback compensation guide file when the fine springback compensation result meets a preset springback compensation condition.
It should be noted that the preset springback compensation condition is different according to the springback compensation, and the set springback compensation error is also different, for example: the maximum allowable error of springback corresponding to the initial springback compensation is-0.5 mm to 0.5mm, and the maximum allowable error of the shaping mold symbol may be-0.6 mm to 0.6mm, which is not specifically limited in this embodiment.
It is understood that the springback compensation instruction file may include a springback compensation instruction file, a glyph type demand instruction file, and a die set instruction file, wherein the springback compensation instruction file includes: the method comprises the following steps of (1) a springback compensation scheme, a springback compensation quantity, a springback result cloud picture before compensation, a springback result cloud picture after compensation, a mold adjusting reference point, a gauge reference point, a springback debugging attention item and the like; the symbol type requirement guide file comprises: the mold adjusting instruction file includes information of mold adjusting reference points of each process, and the like, and this embodiment does not specifically limit this.
In the specific implementation, the target stamping springback compensation instruction file can instruct a user or an operator to carry out stamping springback compensation on the part according to a springback compensation scheme, and can also set a die adjustment reference point, upper and lower die symbol areas, a hollowed area position and the like based on the die symbol instruction file, so that the die repairing times of the user are greatly reduced, and the precision of the stamped part is improved.
The embodiment discloses a stamping springback compensation control method, which comprises the following steps: modeling based on the structure diagram of the stamping die to obtain a stamping die model; performing simulation stamping on the part by using the stamping die model to obtain a simulation stamping result; when the simulation stamping result meets a preset springback condition, performing preliminary springback compensation on the stamping die model subjected to simulation stamping to obtain a stamping die model subjected to preliminary springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to preliminary springback compensation processing to obtain a preliminary springback compensation result; when the initial rebound compensation result is smaller than a preset initial rebound compensation error, setting a die adjusting reference point according to the initial rebound compensation result, and acquiring the type of a die; setting mold symbol information based on the mold category; performing fine springback compensation on the stamping die model subjected to the preliminary springback compensation based on the die adjustment datum point and the die pattern information to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result; the utility model discloses a processing method of springback compensation, including the following steps that meticulous springback compensation result satisfies when predetermineeing springback compensation condition, generate target punching press springback compensation instruction file, this embodiment is through modeling stamping die utensil earlier, and use stamping die model to carry out the emulation punching press to the part, and when the emulation punching press result satisfies the springback compensation condition that sets up, carry out preliminary springback compensation to the die model, obtain the stamping die model after preliminary springback compensation is handled, and carry out the simulation punching press to the part according to the stamping die model after preliminary springback compensation is handled, obtain preliminary springback compensation result, and carry out meticulous springback compensation to the stamping die model after preliminary springback compensation according to preliminary springback compensation result, obtain the stamping die model after the meticulous springback compensation is handled, and carry out the simulation punching press to the part through the stamping die model after the meticulous springback compensation is handled, obtain meticulous springback compensation result, according to meticulous springback compensation result, the springback compensation strategy of output standard, thereby guide the mould production, stamping die manufacture has shortened the cycle that stamping die was made, avoided when having used prior art production mould to carry out the punching press, because the resilience of characteristic of part material itself is kick-back, need the manual work to repair the mould to the part punching state many times, and efficiency, and then through the compensation strategy, and can improve the punching press the part precision through the improvement.
Referring to fig. 3, fig. 3 is a schematic flow chart of a second embodiment of the punch rebound compensation control method according to the present invention.
The mold symbol information comprises forming mold symbol information and trimming and punching mold symbol information.
Based on the first embodiment, in this embodiment, the step S60 includes:
step S601: and setting a die surface, a symbol area and a hollow area of the forming die according to the model structure of the stamping die after the initial springback compensation and the part positioning requirement.
Step S602: and taking the die surface, the symbol area and the hollow area of the forming die as forming die symbol information.
It should be understood that, when fine springback compensation is performed on the stamping die model after the preliminary springback compensation processing, the shaping symbol verification is performed on the preliminary springback compensation result, that is, simulation stamping is performed on the stamping die model after the preliminary springback compensation processing on a springback operation interface of the shaping die, the die surface, the symbol area and the undercut area of the shaping die can be set in a refining manner according to the stamping die model structure after the preliminary springback compensation processing and the part positioning requirements, wherein the die reference point is set as an upper and a lower die symbol areas, appropriate compensation deformation is performed on the die surface of the tool, the positions and the number of the positioning pins or the positioning tools are adjusted, support or clamping is additionally arranged at the corresponding die reference point position in the springback operation interface of the shaping die, part gravity calculation is added to perform symbol analysis on the shaping die finally, the set die surface, the symbol area and the undercut area of the shaping die are used as shaping die symbol information, and symbol analysis on the shaping die is selected in stamping simulation software.
Step S603: and carrying out forming symbol verification on the preliminary springback compensation result through the mold adjusting reference point and the forming mold symbol information to obtain a forming mold symbol result.
In a specific implementation, the simulation stamping calculation is performed on the stamping die model after the preliminary springback compensation processing through the die adjustment reference point and the forming die symbol information, so as to complete the forming symbol verification, before the forming symbol verification, a forming die symbol error can be set, and the forming die symbol error can be a forming die symbol maximum allowable error, wherein the forming die symbol maximum allowable error can be-0.6 mm to 0.6mm, which is not specifically limited in this embodiment.
Step S604: and when the forming die symbol result is smaller than the forming die symbol error, obtaining the stamping die model after the forming die symbol processing.
The molding die pattern error refers to a maximum allowable molding die pattern error, which may be 0.5mm or 0.6mm, and the embodiment will be described with reference to 0.6mm as an example.
When the forming mold symbolic result is smaller than the forming mold symbolic error, the result of the forming symbolic verification on the preliminary springback compensation result is in accordance with the requirement, a stamping mold model after the forming mold symbolic processing is obtained, the stamping mold model after the forming mold symbolic processing can be used for carrying out simulation stamping on the part, the forming mold symbolic result is obtained, and fine springback compensation can be carried out on the stamping mold model in the forming mold symbolic result.
In a specific implementation, referring to fig. 4, if the forming die symbol result is smaller than the forming die symbol error, the first stage of fine springback compensation is completed, i.e. forming symbol verification, after the forming symbol verification is completed, the second stage of fine springback compensation can be performed, trimming and punching symbol verification is performed on the preliminary springback compensation result through trimming and punching die symbol information and a die adjustment datum point, and fine springback compensation is performed according to the trimming and punching symbol verification result; if the forming mold symbol result is not smaller than the forming mold symbol error, the forming symbol verification can be performed again by adjusting the symbol area, the hollowed area, the deformation coefficient of the mold surface of the tool body, the positioning and the like.
Step S605: and performing fine springback compensation on the stamping die model subjected to the shaping die symbol processing through the die adjusting reference point and the shaping die symbol information to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result.
It should be appreciated that the final fine springback compensation of the forming die-pattern processed stamping die model can be performed by the tuning reference point and the forming die-pattern information.
Further, before the fine springback compensation is performed on the stamping die model after the shaping die symbol processing through the die adjustment reference point and the shaping die symbol information to obtain the stamping die model after the fine springback compensation processing, and the simulation stamping is performed on the part according to the stamping die model after the fine springback compensation processing to obtain a fine springback compensation result, the trimming symbol verification may be performed on the preliminary springback compensation result, and then before step S605, the method further includes: setting a die surface, a symbol area and a hollow area of the trimming and punching die according to the punching die model structure after the initial springback compensation and the part positioning requirement; taking the die surface, the symbol area and the hollowed area of the trimming and punching die as the symbol information of the trimming and punching die; performing trimming symbol verification on the preliminary springback compensation result through the die adjusting datum point and the trimming and punching die symbol information to obtain a trimming and punching die symbol result; when the symbolic result of the trimming punching die is smaller than the symbolic error of the trimming punching die, a punching die model after symbolic processing of the trimming punching die is obtained; and performing fine springback compensation on the stamping die model subjected to the symbol processing of the trimming and punching die through the die adjusting reference point and the symbol information of the trimming and punching die to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result.
In the embodiment, the tool body die surface of the trimming and punching die can be set according to the initial springback compensation result, the symbol area and the hollowed area are set in a thinning mode, the die adjusting datum point is the upper die symbol area and the lower die symbol area, appropriate compensation deformation is carried out on the tool body die surface, the position and the number of the positioning pins/positioning tools are adjusted, supporting or clamping is additionally arranged at the position of the corresponding die adjusting datum point in the springback operation interface of the trimming and punching die, part gravity calculation is added, and finally the symbol analysis of the trimming and punching die is carried out in punching simulation software. And the die surface, the symbol area and the hollowed area of the trimming and punching die are used as the symbol information of the trimming and punching die.
It should be understood that the trimming symbol type verification is carried out on the preliminary springback compensation result according to the die surface, the symbol type area and the emptying area in the die adjusting datum point and the trimming punch type die symbol type information, and the trimming die symbol type result is obtained. When the trimming die symbol result is smaller than the trimming and punching die symbol error, the result of performing trimming symbol verification on the initial springback compensation result is in accordance with the requirement, final fine springback compensation can be performed on the stamping die model after the trimming and punching die symbol processing to obtain a stamping die model after the fine springback compensation processing, and simulation stamping is performed on the part through the stamping die model after the fine springback compensation processing to obtain a final fine springback compensation result.
It can be understood that the symbol error of the trimming and punching type die may be a symbol maximum allowable error of the trimming and punching type die, wherein the symbol maximum allowable error of the trimming and punching type die may be-0.6 mm to 0.6mm, and the embodiment is not particularly limited thereto.
In the specific implementation, referring to fig. 5, if the symbol result of the trimming and punching die is smaller than the symbol error of the trimming and punching die, the second stage of fine springback compensation is completed, that is, the punching die model after the preliminary springback compensation is subjected to simulation punching on the springback operation interface of the trimming and punching die, so that the verification of the trimming symbol is completed. The method comprises the steps of performing final fine springback compensation on a stamping die model subjected to shaping die symbol processing according to a die adjusting reference point and shaping die symbol information, performing final fine springback compensation on a stamping die model subjected to trimming and punching die symbol processing through the die adjusting reference point and the trimming and punching die symbol information to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to fine springback compensation processing to obtain a fine springback compensation result; if the symbol result of the trimming punching die is not smaller than the symbol error of the trimming punching die, the symbol verification of the trimming punching die can be carried out again by adjusting the symbol area, the hollowing area, the die surface deformation coefficient of the tool body, the positioning and the like.
In a specific implementation process, referring to fig. 6, fig. 6 is a schematic diagram of a final fine springback compensation flow, performing a stamping simulation calculation through the mold adjustment reference point, the forming die symbol information, and the trimming punch die symbol information to obtain a final overall fine springback compensation, and when a fine springback compensation result obtained by the final overall fine springback compensation is smaller than a maximum allowable error of the fine springback compensation, completing a third stage of the fine springback compensation, i.e., the overall fine springback compensation, and generating a target stamping springback compensation guide file, where the maximum allowable error of the fine springback compensation may be-0.3 mm to 0.3mm, which is not specifically limited in this embodiment.
When the springback compensation result of the fine springback compensation is not smaller than the maximum allowable error of the fine springback compensation, the die adjusting reference point, the forming type die body, the trimming punching type die body and the like can be adjusted, fine springback compensation is conducted again according to the adjusted die adjusting reference point, the forming type symbol die information and the trimming punching type symbol die information, a punching die model after the fine springback compensation is obtained, and simulation punching is conducted on the part through the punching die model after the fine springback compensation is conducted until the fine springback compensation result is smaller than the maximum allowable error of the fine springback compensation.
The embodiment discloses that the mold symbol information comprises forming mold symbol information and trimming and punching mold symbol information; setting a die surface, a symbol area and a hollow area of a forming die according to a stamping die model structure subjected to preliminary springback compensation and part positioning requirements; taking the die surface, the symbol area and the hollowed area of the forming die as the symbol information of the forming die; carrying out shaping symbol verification on the preliminary springback compensation result through the mould adjusting reference point and the shaping mould symbol information to obtain a shaping mould symbol result; when the forming die symbol result is smaller than the forming die symbol error, obtaining a stamping die model after the forming die symbol processing; and performing fine springback compensation on the stamping die model subjected to the shaping die symbol processing through the die adjusting reference point and the shaping die symbol information to obtain a stamping die model subjected to fine springback compensation processing, performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result, increasing the setting of the die adjusting reference point and the symbol setting and verification, improving the accuracy and efficiency of springback compensation, and overcoming the defects of large distortion of a simulation result, more die repairing times, long time consumption and the like in the prior art.
Referring to fig. 7, fig. 7 is a schematic flow chart of a third embodiment of the punch rebound compensation control method according to the present invention.
Based on the second embodiment, in this embodiment, the step S70 includes:
step S701: and when the fine resilience compensation result is smaller than a preset fine resilience compensation error, acquiring a resilience compensation result corresponding to the resilience compensation strategy.
Step S702: and generating a resilience compensation description file according to the resilience compensation strategy and a resilience compensation result corresponding to the resilience compensation strategy.
It should be noted that the springback compensation instruction file may include a springback compensation instruction and a symbolic demand instruction file, where the springback compensation instruction includes: the method includes the following steps of compensating for springback, compensating for a springback result cloud picture before compensation, compensating for a springback result cloud picture after compensation, adjusting a reference point of a mold, checking a reference point of a gauge, and adjusting notes of springback.
Step S703: and acquiring the forming mold symbolic information and the trimming and punching mold symbolic information.
In a specific implementation, the forming die symbol information may be set according to the preliminary springback compensation result, and the trimming and punching die symbol information may be set according to the forming die symbol springback compensation result, so as to obtain the forming die symbol information and the trimming and punching die symbol information.
Step S704: and generating a mould symbol instruction file according to the forming type mould symbol information and the trimming and punching type mould symbol information.
It is understood that the mold token guideline file includes: the pattern areas of the upper and lower dies, the hollow area, the positions and the number of the datum points of the die adjustment, the positioning information, etc. are not particularly limited in this embodiment.
Step S705: and acquiring the information of the mold adjusting reference point of each procedure.
It should be understood that each process mode-adjusting reference point information includes the mode-adjusting reference point information set for all the process springback stable areas obtained from the preliminary springback compensation result.
Step S706: and generating a mould adjusting guide file according to the mould adjusting datum point information of each procedure.
In specific implementation, after the mold adjustment reference point information of each process is acquired, the mold adjustment guide file can be generated according to the mold adjustment reference point information.
Step S707: and generating a target stamping springback compensation instruction file according to the springback compensation instruction file, the mould symbolic type instruction file and the mould adjusting instruction file.
In the specific implementation, the target stamping springback compensation instruction file can instruct a user or an operator to perform part stamping springback compensation according to a springback compensation scheme, and can also set a die adjustment reference point, upper and lower die symbol areas, a hollowed area position and the like based on the die symbol instruction file, so that the die repairing times of the user are greatly reduced, and the precision of stamping parts is improved.
In the embodiment, when the fine resilience compensation result is smaller than a preset fine resilience compensation error, a fine resilience compensation result corresponding to a fine resilience compensation strategy is obtained; generating a springback compensation description file according to the fine springback compensation strategy and a fine springback compensation result corresponding to the fine springback compensation strategy; acquiring forming die symbolic information and trimming and punching die symbolic information; generating a mold symbolic instruction file according to the forming mold symbolic information and the trimming and punching mold symbolic information; and generating a target stamping springback compensation instruction file according to the springback compensation instruction file and the die symbolic instruction file, recording a springback compensation scheme and a springback compensation result through the springback compensation instruction file, performing springback analysis and experience accumulation on a part real object, and recording information such as the symbolic areas, the hollowing areas, the die adjusting reference points and the positioning of a forming die and a trimming and punching die according to the die symbolic instruction file, so that the subsequent guidance of manufacturing of processing data and processing of the die are facilitated, and the precision of a stamped part is improved.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.
It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.
In addition, the technical details that are not elaborated in this embodiment can be referred to the punch rebound compensation control method provided by any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A press-back compensation control method, characterized by comprising:
modeling based on the structure diagram of the stamping die to obtain a stamping die model;
performing simulation stamping on the part by using the stamping die model to obtain a simulation stamping result;
when the simulation stamping result meets a preset springback condition, performing preliminary springback compensation on the stamping die model subjected to simulation stamping to obtain a stamping die model subjected to preliminary springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to preliminary springback compensation processing to obtain a preliminary springback compensation result;
when the initial rebound compensation result is smaller than a preset initial rebound compensation error, setting a die adjusting reference point according to the initial rebound compensation result, and acquiring the type of a die;
setting mold symbol information based on the mold category;
performing fine springback compensation on the stamping die model subjected to the preliminary springback compensation based on the die adjustment datum point and the die pattern information to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result;
and generating a target stamping springback compensation guide file when the fine springback compensation result meets a preset springback compensation condition.
2. The punch-back compensation control method according to claim 1, wherein the die-pattern information includes a forming-type die-pattern information and a trim-punch-type die-pattern information;
the stamping die model after preliminary springback compensation is carried out meticulous springback compensation based on accent mould benchmark and mould symbol information, obtains the stamping die model after meticulous springback compensation is handled to according to the stamping die model after meticulous springback compensation is handled carries out the simulation punching press to the part, obtains meticulous springback compensation result, includes:
setting a die surface, a symbol area and a hollowed area of a forming die according to a stamping die model structure subjected to preliminary springback compensation and part positioning requirements;
taking the die surface, the symbol area and the hollowed area of the forming die as the symbol information of the forming die;
carrying out forming symbol verification on the preliminary springback compensation result through the die adjusting reference point and the forming type die symbol information to obtain a forming type die symbol result;
when the forming die symbol result is smaller than the forming die symbol error, obtaining a stamping die model after the forming die symbol processing;
and performing fine springback compensation on the stamping die model subjected to the shaping die symbol processing through the die adjusting reference point and the shaping die symbol information to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result.
3. The stamping springback compensation control method according to claim 2, wherein the step of performing the fine springback compensation on the stamping die model after the shaping die prototype processing through the die-adjusting reference point to obtain the stamping die model after the fine springback compensation processing, and performing the simulation stamping on the part according to the stamping die model after the fine springback compensation processing to obtain the fine springback compensation result further comprises:
setting a die surface, a symbol area and a hollow area of the trimming and punching die according to the punching die model structure after the initial springback compensation and the part positioning requirement;
taking the die surface, the symbol area and the hollowed area of the trimming and punching die as the symbol information of the trimming and punching die;
performing trimming symbol verification on the preliminary springback compensation result through the die adjusting datum point and the trimming and punching die symbol information to obtain a trimming and punching die symbol result;
when the symbolic result of the trimming punching die is smaller than the symbolic error of the trimming punching die, a punching die model after symbolic processing of the trimming punching die is obtained;
and performing fine springback compensation on the stamping die model subjected to the symbol processing of the trimming and punching die through the die adjusting reference point and the symbol information of the trimming and punching die to obtain a stamping die model subjected to fine springback compensation processing, and performing simulation stamping on a part according to the stamping die model subjected to the fine springback compensation processing to obtain a fine springback compensation result.
4. The stamping springback compensation control method according to claim 1, wherein the step of performing the preliminary springback compensation on the stamping die model after the simulated stamping to obtain the stamping die model after the preliminary springback compensation processing, and the step of performing the simulation stamping on the part according to the stamping die model after the preliminary springback compensation processing to obtain the preliminary springback compensation result further comprises:
adjusting a primary springback compensation strategy and a primary springback compensation coefficient;
and carrying out preliminary springback compensation on the stamping die model according to the adjusted preliminary springback compensation strategy and the adjusted preliminary springback compensation coefficient to obtain the stamping die model after preliminary springback compensation processing, and carrying out simulation stamping on the part according to the stamping die model after preliminary springback compensation processing to obtain a preliminary springback compensation result.
5. The stamping springback compensation control method of claim 1, wherein after the step of performing the simulated stamping on the part by using the stamping die model to obtain the simulated stamping result, the method further comprises the following steps:
when the simulation stamping result does not meet the preset springback compensation condition, adjusting a stamping process strategy to obtain a preset stamping process strategy;
and carrying out simulation stamping on the part through the preset stamping process strategy, wherein the preset stamping process strategy comprises the following steps: drawing, forming, material clamping and flanging, adjusting process modeling and adjusting processing pressure.
6. The stamping springback compensation control method of claim 1, wherein the setting of the die adjustment reference point according to the preliminary springback compensation result comprises:
acquiring a rebound stable area of each procedure according to the initial rebound compensation result;
and setting a die adjustment reference point based on the rebound stable area of each process.
7. The punch rebound compensation control method according to any one of claims 1 to 6, wherein the generating of the target punch rebound compensation guideline file when the fine rebound compensation result satisfies a preset rebound compensation condition comprises:
when the fine springback compensation result is smaller than a preset fine springback compensation error, acquiring a springback compensation result corresponding to a springback compensation strategy;
generating a springback compensation instruction file according to the springback compensation strategy and a springback compensation result corresponding to the springback compensation strategy;
acquiring forming die symbolic information and trimming and punching die symbolic information;
generating a mould symbolic instruction file according to the forming mould symbolic information and the trimming and punching mould symbolic information;
acquiring the information of the reference point of the mode adjustment in each procedure;
generating a mould adjusting guide file according to the mould adjusting datum point information of each procedure;
and generating a target stamping springback compensation instruction file according to the springback compensation instruction file, the mould symbolic type instruction file and the mould adjusting instruction file.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117086175A (en) * | 2023-10-18 | 2023-11-21 | 南通品杰模塑科技有限公司 | Deformation compensation control method and system for stamping die |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117086175A (en) * | 2023-10-18 | 2023-11-21 | 南通品杰模塑科技有限公司 | Deformation compensation control method and system for stamping die |
| CN117086175B (en) * | 2023-10-18 | 2023-12-29 | 南通品杰模塑科技有限公司 | Deformation compensation control method and system for stamping die |
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