CN112828168B - Digital conversion manufacturing method for craftsman skill of magnesium-aluminum alloy automobile covering part die - Google Patents
Digital conversion manufacturing method for craftsman skill of magnesium-aluminum alloy automobile covering part die Download PDFInfo
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Abstract
The invention discloses a magnalium automobile panel die craftsman skill digital conversion manufacturing method, which solves the technical problem that the existing magnalium automobile panel die is difficult to manufacture. The method comprises the steps of determining a central area of a geometric profile, classifying/radian springback correction rows, constructing an unequal-gap male die, bulging a reserved trimming area, sharpening a core forming arc, programming and carrying out numerical control machining, adjusting and sizing the reserved trimming area by a craftsman and researching. According to the invention, a large amount of worker experience, worker skill and experimental results form a systematic data processing system, so that the problem of large-scale worker debugging in the mold manufacturing process is solved through advanced digital processing and mechanical processing, the manual labor amount of workers is reduced, the judgment error of the workers is reduced, and the skill requirement of the workers is reduced; from the experimental record, the labor capacity of the craftsmen can be reduced by 65-95%.
Description
Technical Field
The invention relates to the technical field of manufacturing of magnesium-aluminum alloy automobile panel dies, in particular to a digital conversion manufacturing method for magnesium-aluminum alloy automobile panel die craftsmen.
Background
The manufacturing of the automobile panel die is the combination of craftsmanship and high technology, and along with the continuous improvement of automobile quality, the requirements on the material of the automobile panel are increasingly improved, and the requirements on the molding quality are also greatly improved; meanwhile, along with the acceleration of the automobile updating, the manufacturing period of the automobile covering part mold is continuously shortened, and the high-quality requirement and the wide application of new materials of the automobile covering part result in the improvement of the skill level requirement of workers and the continuous increase of the debugging period, so that the production speed of the automobile covering part mold is not matched with the updating period of the automobile. Particularly, in the production of magnesium-aluminum alloy automobile panel moulds, because magnesium-aluminum alloy has large resilience and poor formability, a large amount of worker debugging work is needed, great worker difficulty is brought to the high-precision manufacturing of the magnesium-aluminum alloy moulds, and the great demand of worker skills becomes the bottleneck of industry; meanwhile, in the actual production process, the high technology conversion of the craftsman skill is not strong, so that the craftsman can repair and adjust the high skill operation, and the labor intensity of the craftsman is high, the consideration is complex, the problem is easy to occur, the craftsman operation is repeated, the period uncertainty is prolonged, and the accurate manufacturing is greatly troubled.
Disclosure of Invention
Aiming at the defects in the background art, the invention provides a digital conversion manufacturing method for the craftsman skill of a magnesium-aluminum alloy automobile panel mould, which solves the technical problem that the existing magnesium-aluminum alloy automobile panel mould is difficult to manufacture.
In order to solve the problems, an advanced computer digital preprocessing technology is developed by analyzing the manufacturing process of the magnesium-aluminum alloy automobile covering part die in detail and combining large-batch craftsman technical analysis and skill know-how by utilizing the modern software technology and carrying out numerical control processing reservation on the adjusting area of the magnesium-aluminum alloy automobile covering part die craftsman through unbalanced die clearance software processing in the early stage, so that the craftsman trimming amount of the magnesium-aluminum alloy automobile covering part die is greatly reduced by numerical control processing, the prejudgment errors and the skill difference errors of the craftsman trimming are reduced, the core high-difficulty skills are operated by the craftsman, the craftsman manufacturing period is greatly prolonged, the debugging cost is reduced, the die and product precision are improved, and a foundation is laid for converting the craftsman skills of the automobile cold stamping die with new materials into intelligent manufacturing.
The invention is established on the basis of summarizing and classifying a large amount of craftsman experience and technical know-how of the cold stamping die of the large automobile panel; aiming at the problem that a large number of craftsmen need to manually debug and trim the magnesium-aluminum alloy automobile covering part die in the debugging process, the common debugging space of craftsmen experience and skill is utilized to carry out early-stage over-positive process correction and perform craftsmen experience pre-processing, so that the craftsmen can greatly reduce the operation of the craftsmen by debugging the craftsmen in the later stage only by adjusting the early-stage reserved adjusting area, the prejudgment and the skill errors in the debugging and trimming process of the craftsmen are reduced, the operation difficulty and the labor capacity of the craftsmen are reduced, and the die precision of the magnesium-aluminum alloy automobile covering part die and the precision of automobile parts are improved, wherein the material thickness interval of the magnesium-aluminum alloy automobile covering part die is 0.5-1.8mm.
The technical scheme of the invention is realized as follows: a technology digitalized conversion manufacturing method for a mould of a magnesium-aluminum alloy automobile covering part comprises the steps of determining a central area of a geometric profile, sorting/radian springback correction rows, constructing unequal-gap male moulds, bulging a reserved trimming area, sharpening a core forming arc, programming and numerical control machining, adjusting the reserved trimming area by a craftsman, shaping and grinding.
Determining the central area of the geometric profile; based on a product process digital molded surface (hereinafter referred to as a digital type), extracting a maximum peripheral curve, neglecting a raised or depressed area less than 5% of the total circumference to form a smooth geometric boundary outer ring, then taking the geometric outer ring as a boundary, reducing the geometric boundary outer ring by taking 10% of the longest diameter of the geometric outer ring as a reference number, repeatedly reducing until the plane area of the geometric boundary outer ring is within 10% of the area of the original geometric boundary outer ring to form a minimum geometric boundary outer ring, then constructing a longest connecting line in the minimum geometric outer ring, wherein the minimum geometric boundary outer ring is a geometric molded surface central area, the longest connecting line is a geometric central line, and the line segment is an adjustment center.
Category/radian springback correction column; determining the technological over-correction amount of a rebound area of an automobile covering part by using a covering part formed by a mold according to the thickness of a material, an included angle (hereinafter referred to as an angle) between an outer ring straight line from an adjustment center to a geometric boundary and an adjustment center to a ground plane and the yield strength of the material; the method is characterized in that the process pre-correction is implemented on a data model of the covering part, the process pre-correction is established on the basis of analysis and correction data of normal automobile covering part mould springback CAE, the conventional mould process is further processed, correction data are not distributed in a normal or data curve mode, correction column data are formed, a category/radian springback correction column is pre-correction grouped data combined with craftsman experience and experimental data, and the specific correction column data are as follows:
note: the threshold value is arranged in the upper class column, if the material thickness is 0.7mm, the corresponding value of the class column 2,0.7-0.9 is selected;
process overcorrection = correction 1+ correction 2+ correction 3
The over-correction amount is a correction ratio of a key rebound area of the automobile panel, namely the normal process calculation rebound amount is X, and the process pre-correction value is required to be processed as the processing amount of 'X process over-correction amount' according to the category/radian rebound correction row.
Unequal-gap male dies; because the material thickness of the automobile covering part is constant, the gap between an upper cavity and a lower cavity of the mold is also fixed under the general condition, but in the actual production process of the magnesium-aluminum alloy automobile covering part mold, because of factors such as product dead weight, aging micro-deformation, dynamic pressure lower mold deformation, disordered distribution of force bearing points of the product and the like, the balanced gap of the mold cavity can generate a series of problems such as uneven surface fit, incomplete local forming, disordered rebound and the like, so an unequal gap curve needs to be constructed, the unequal gap curve is used for carrying out uplifting treatment on a lower module type of the mold, the unequal gap curve is suitable for automobile covering parts with angles below 40 degrees and lengths larger than 500mm, the range-exceeding part is not used for carrying out the curve treatment, and the unequal gap curve convex mold is made as follows:
a, projecting the numerical form on a plane according to a stamping direction to obtain the planar projection of the numerical form, wherein the center of the projection is a central point of a Chinese character 'mi', and the Chinese character 'mi' with the largest range is drawn on the numerical form;
b, projecting the Chinese character 'mi' on the number form, and waiting for the Chinese character 'mi' of the space curve;
c, gradually raising each outer end point of the space curve Chinese character 'mi' towards the center point of the Chinese character 'mi' after the outer end point of the space curve Chinese character 'mi' is 200mm inward; the elevation value is referenced to the following formula: elevation = length/1000 × 0.5 × stock thickness; forming a new raised Chinese character 'mi' curve;
d, because the length of each line of the line is different, the central points are not overlapped and become a plurality of space line segments, all curves need to be gradually optimized to form a line curve with overlapped central points, and the curve is an unequal clearance curve of the male die;
and e, utilizing the unequal clearance curve as a reference line logarithm type to perform gradual change bulging, wherein the logarithm type after bulging is the unequal clearance curve convex die processing reference logarithm type, and the logarithm type of the concave die is also the original logarithm type, so that a preliminary unequal clearance die is formed.
Constructing a convex-concave die with unequal gaps and large-angle strong pressure behind the convex die; for a large-angle change (generally, an included angle between the large-angle change and the punching direction is within 30 degrees) area with a large area (the area is more than 5% of the total area or the edge area accounts for more than 8% of the total circumference), performing adduction on the molded surface of the area of the male die, wherein the adduction value is 10% of the material thickness; simultaneously, the material thickness is contracted by 15-20% in the corresponding female die area, and a strong pressure area of about 10% is formed in the area; so that the areas are preferentially contacted and form strong pressure in the stamping process of the die, and different sequential pressure receiving modes in the same die are created.
Reserving a trimming area to be raised; the pre-reserved trimming area bulge is a pre-convex die bulge carried out on a trimming area of a core craftsman, is used for reducing the large-area reduction of a die caused by the fact that the core area needs to be protruded in the later period by lifting up the core trimming area, and is used for carrying out preprocessing digital preprocessing operation adopted by paying out a large amount of craftsman operation, the bulge mode is that a key molding arc angle (generally an arc angle for controlling the shape trend of a product) analyzed by CAE on a model is bulged, and the bulge amount is not more than 5% of a total molding control fillet; the bulging mode is as follows; the height of the circular arc corner bulge = material thickness, the process correction amount is increased, and after the bulge is completed, the smooth transition of 25-40mm is carried out on the peripheral area of the circular bead, so that the integral number transition is smooth, and the reserved trimming area bulge with the smooth transition is formed.
Sharpening a core forming arc; the core forming arc is a main control forming arc angle of CAE analysis on a numerical model and comprises a key forming arc and a secondary forming arc with a control effect, a sharpening mode is explored through multiple experiments, the sharpening mode can be carried out by taking 10-power-opening priority sequence as a whole, namely, the core forming arc on the male die is sharpened by 1.25 times, meanwhile, the corresponding female die area is amplified by 1.25 times, so that the effects that the male die is sharpened, the female die is damaged, and the die cavity of the core forming arc area is greatly enlarged are achieved.
Programming and numerical control machining, in the normal mould manufacturing process, the male and female moulds of the mould are machined by the same number, but the male and female moulds of the patent are digitally converted and adjusted by different craftsman skills, so that the male mould is programmed by the male mould number, the female mould is programmed by the female mould number, and the male and female moulds with different shapes are machined by the numerical control machining according to the normal high-precision mould machining mode.
The craftsman reserves the trimming area for adjustment; after the die is machined, a worker debugging stage is started, at the moment, the worker only adjusts the reserved area and the core arc according to the forming state of the product, so that the automobile covering part formed by the die meets the precision requirement, the worker adjusting area is centralized and clearer, and the worker trimming amount is effectively reduced by over 70%.
And after the precision meets the requirement, the integral die is subjected to upper and lower die shaping and grinding to meet the requirements of the laminating rate and coloring, so that the service life of the die and the precision of the product are ensured to be constant, the finished product is obtained after the operation of a normal craftsman, and the product can be delivered for use.
The invention is applied to the manufacturing process of the magnalium automobile covering part die, reduces specialized manual labor by digitally processing and manufacturing the craftsman experience debugging skill, and has the advantages that:
1, the invention forms a data processing system of a system by a great deal of craftsman experience, craftsman skills and experimental results, thereby solving the problem of great craftsman debugging in the mould manufacturing process through advanced digital processing and mechanical processing, reducing the manual labor amount of craftsmen, reducing the judgment error of craftsmen and reducing the craftsman skill requirements; from the experimental record, the labor capacity of craftsmen can be reduced by 65-95%.
2, a brand-new craftsman debugging mode is created for the high-difficulty springback automobile panel parts, the craftsman debugging period is greatly reduced, and the precision debugging of the high-difficulty automobile panel is reduced by 2 times from 6 times; the period is reduced by more than 60%.
3, large-area digital processing replaces craftsman trimming, and the product precision and traceability are greatly improved.
4, the problem of dynamic load bearing change of a die cavity caused by factors such as product dead weight, aging micro-deformation, die deformation under dynamic pressure, disordered distribution of load bearing points of the product and the like is solved, so that perfect comprehensive dynamic stress balance of the automobile covering part is achieved through unequal gap manufacturing, and the forming problem is greatly reduced.
Drawings
In order to illustrate the embodiments of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings may be derived from them by a person skilled in the art without inventive effort.
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
A digital conversion manufacturing method for craftsman skills of a magnesium-aluminum alloy automobile covering part die comprises the steps of determining a geometric profile center area, classifying/radian springback correction rows, constructing unequal-gap male dies, bulging a reserved trimming area, sharpening a core forming arc, programming and numerical control machining, adjusting and sizing the reserved trimming area of a craftsman, and grinding, wherein the geometric profile center area is determined by the craftsman.
Determining the central area of the geometric profile; based on a product process digital molded surface (hereinafter referred to as a digital type), extracting a maximum peripheral curve, neglecting a raised or depressed area less than 5% of the total circumference to form a smooth geometric boundary outer ring, then taking the geometric outer ring as a boundary, reducing the geometric boundary outer ring by taking 10% of the longest diameter of the geometric outer ring as a reference number, repeatedly reducing until the plane area of the geometric boundary outer ring is within 10% of the area of the original geometric boundary outer ring to form a minimum geometric boundary outer ring, then constructing a longest connecting line in the minimum geometric outer ring, wherein the minimum geometric boundary outer ring is a geometric molded surface central area, the longest connecting line is a geometric central line, and the line segment is an adjustment center.
Category/radian rebound correction column; determining the technological over-correction amount of a rebound area of an automobile covering part by using a covering part formed by a mold according to the thickness of a material, an included angle (hereinafter referred to as an angle) between an outer ring straight line from an adjustment center to a geometric boundary and an adjustment center to a ground plane and the yield strength of the material; the method is characterized in that the process pre-correction is implemented on a data model of the covering part, the process pre-correction is established on the basis of analysis and correction data of normal automobile covering part mould springback CAE, the conventional mould process is further processed, correction data are not distributed in a normal or data curve mode, correction column data are formed, a category/radian springback correction column is pre-correction grouped data combined with craftsman experience and experimental data, and the specific correction column data are as follows:
note: the threshold value is arranged in the upper class column, if the material thickness is 0.7mm, the corresponding value of the class column 2,0.7-0.9 is selected;
process overcorrection = correction 1+ correction 2+ correction 3
The over-correction amount is a correction ratio of a key rebound area of the automobile panel, namely the normal process calculation rebound amount is X, and the process pre-correction value is required to be processed as the processing amount of 'X process over-correction amount' according to the category/radian rebound correction row.
Unequal-gap male dies; because the material thickness of the automobile covering part is constant, the gap between an upper cavity and a lower cavity of the mold is also fixed under the common condition, but in the actual production process of the magnesium-aluminum alloy automobile covering part mold, because of the product dead weight, aging micro-deformation, dynamic pressure lower mold deformation, disordered distribution of force bearing points and other factors, a series of problems of uneven surface fit, incomplete local forming, disordered rebound and the like can be generated in the balanced gap of the mold cavity, so an unequal gap curve needs to be constructed, the lower module of the mold is subjected to uplift treatment by using the unequal gap curve, the unequal gap curve is suitable for automobile covering parts with the angles below 40 degrees and the lengths of more than 500mm, the curve treatment is not carried out when the range is exceeded, and the unequal gap curve male mold is manufactured as follows:
a, projecting the number type on a plane according to a stamping direction to obtain the plane projection of the number type, wherein the center of the projection is a center point of a Chinese character 'mi', and drawing the Chinese character 'mi' in the maximum range on the number type;
b, projecting the Chinese character 'mi' on the number form, and waiting for the Chinese character 'mi' of the space curve;
c, gradually raising each outer end point of the space curve Chinese character 'mi' towards the center point of the Chinese character 'mi' after the outer end point of the space curve Chinese character 'mi' is 200mm inward; the elevation value is referenced to the following formula: elevation = length/1000 × 0.5 × stock thickness; forming a new raised Chinese character 'mi' curve;
d, because the length of each line of the line is different, the central points are not overlapped and become a plurality of space line segments, all curves need to be gradually optimized to form a line curve with overlapped central points, and the curve is an unequal clearance curve of the male die;
and e, utilizing the unequal clearance curve as a reference line logarithm type to perform gradual change bulging, wherein the logarithm type after bulging is the unequal clearance curve convex die processing reference logarithm type, and the logarithm type of the concave die is also the original logarithm type, so that a preliminary unequal clearance die is formed.
Constructing a convex-concave die with unequal gaps and large-angle strong pressure behind the convex die; for a large-angle change (generally, an included angle between the large-angle change and the punching direction is within 30 degrees) area with a large area (the area is more than 5% of the total area or the edge area accounts for more than 8% of the total circumference), performing adduction on the molded surface of the area of the male die, wherein the adduction value is 10% of the material thickness; simultaneously, performing inward contraction on the corresponding female die area with the material thickness of 15-20%, and forming a strong pressure area of about 10% in the area; so that the areas are preferentially contacted and form strong pressure in the stamping process of the die, and different sequential pressure receiving modes in the same die are created.
Reserving a trimming area to be raised; the pre-reserved trimming area bulge is a pre-convex die bulge carried out on a trimming area of a core craftsman, is used for reducing the large-area reduction of a mold due to the fact that the core area needs to be protruded in the later period by lifting the core trimming area, and is used for carrying out preprocessing digital preprocessing operation which is carried out by paying out a large amount of craftsman operation, the bulge mode is that a key forming arc angle (generally an arc angle for controlling the shape trend of a product) analyzed by CAE on the model is bulged, and the bulge amount is not more than 5% of a total forming control fillet; the bulging mode is as follows; the height of the circular arc corner bulge = material thickness, and the process overcorrection amount, after the bulge is finished, the smooth transition of 25-40mm is carried out on the peripheral area of the fillet, so that the integral number transition is smooth, and the bulge of the reserved trimming area with excessive smoothness is formed.
Sharpening a core forming arc; the core forming arc is a main control forming arc angle of CAE analysis on a numerical model and comprises a key forming arc and a secondary forming arc with a control effect, a sharpening mode is explored through multiple experiments, the sharpening mode can be carried out by taking 10-power-opening priority sequence as a whole, namely, the core forming arc on the male die is sharpened by 1.25 times, meanwhile, the corresponding female die area is amplified by 1.25 times, so that the effects that the male die is sharpened, the female die is damaged, and the die cavity of the core forming arc area is greatly enlarged are achieved.
Programming and numerical control machining, in the normal mould manufacturing process, the male and female moulds of the mould are machined by the same number, but the male and female moulds of the patent are digitally converted and adjusted by different craftsman skills, so that the male mould is programmed by the male mould number, the female mould is programmed by the female mould number, and the male and female moulds with different shapes are machined by the numerical control machining according to the normal high-precision mould machining mode.
Adjusting a reserved trimming area by a craftsman; after the die is machined, entering a craftsman debugging stage, and at the moment, the craftsman only adjusts the reserved area and the core arc according to the forming state of the product, so that the automobile covering piece formed by the die meets the precision requirement, centralizes and clarifies the craftsman adjusting area, and effectively reduces the craftsman trimming amount by more than 70 percent.
And after the precision meets the requirement, the integral die is subjected to upper and lower die shaping and grinding to meet the requirements of the laminating rate and coloring, so that the service life of the die and the precision of the product are ensured to be constant, the finished product is obtained after the operation of a normal craftsman, and the product can be delivered for use.
The invention is not described in detail in all conventional technical means known to a person skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. The magnalium automobile panel mould craftsman technology digital conversion manufacturing method is characterized in that: the method comprises the steps of determining a central area of a geometric profile, classifying/radian springback correction rows, constructing unequal-gap male dies, bulging a reserved trimming area, sharpening a core forming arc, programming and numerical control processing, adjusting and shaping the reserved trimming area by a craftsman and grinding;
the method for determining the central area of the geometric profile comprises the following steps: based on a product process digital profile, extracting a maximum peripheral curve, neglecting a raised or depressed region less than 5% of the total circumference to form a smooth geometric boundary outer ring, then using the geometric boundary outer ring as a boundary, reducing the geometric boundary outer ring by using 10% of the longest diameter of the geometric outer ring as a reference number, repeatedly reducing until the plane area of the geometric boundary outer ring is within 10% of the area of the original geometric boundary outer ring to form a minimum geometric boundary outer ring, then constructing a longest connecting line in the minimum geometric outer ring, marking the minimum geometric boundary outer ring as a geometric profile central region, marking the longest connecting line as a geometric central line, and marking the midpoint of the longest connecting line as an adjustment center;
the method for classifying/radian-correcting the springback correction column comprises the following steps: determining the technological overcorrection amount of a rebound area of an automobile covering part by using the covering part formed by the die according to the material thickness, the angle between an outer ring straight line from an adjustment center to a geometric boundary and an included angle between the adjustment center and a ground plane and the yield strength of a material; the angle of an included angle between the outer ring straight line from the adjusting center to the geometric boundary and the adjusting center to the ground plane is recorded as an angle;
the method is characterized in that the process pre-correction is implemented on a data model of the covering part, the process pre-correction is established on the basis of analysis and correction data of normal automobile covering part mould springback CAE, the conventional mould process is further processed, the correction data are not distributed in a normal or data curve mode to form correction column data, the category/radian springback correction column is pre-correction grouped data combined with craftsman experience and experimental data, and the specific correction column data are as follows:
note: the boundary value is arranged in the upper class column;
the process overcorrection = correction 1+ correction 2+ correction 3;
the process overcorrection amount is a correction ratio of a key rebound area of the automobile panel, and when the normal process calculates that the rebound amount is X, the process precorrection value is required to be processed into the processing amount of 'X process overcorrection amount' according to the category/radian rebound correction row;
the method for constructing the unequal-gap male die comprises the following steps: a, projecting the number type on a plane according to a stamping direction to obtain the plane projection of the number type, wherein the center of the projection is a center point of a Chinese character 'mi', and drawing the Chinese character 'mi' in the maximum range on the number type; b, projecting the Chinese character 'mi' on the number model to obtain a space curve Chinese character 'mi'; c, gradually raising each outer end point of the space curve Chinese character 'mi' towards the center point of the Chinese character 'mi' after the outer end point of the space curve Chinese character 'mi' is 200mm inward; the elevation value is referenced to the following formula: elevation = length/1000 × 0.5 × stock thickness; forming a new raised Chinese character 'mi' curve; d, because the length of each line of the cross line is different, the condition that the central points are not coincident and become a plurality of space line segments is caused, all curves need to be gradually optimized to form a cross curve with coincident central points, and the curve is an unequal clearance curve of the male die; e, utilizing an unequal clearance curve as a reference line logarithm type to perform gradual swelling, wherein the swelled logarithm type is the unequal clearance curve convex die processing reference logarithm type, and the concave die logarithm type also uses the original logarithm type, so that a preliminary unequal clearance die is formed;
the method for reserving the bulge of the trimming area comprises the following steps: the key forming arc angle of CAE analysis on the logarithm is raised, and the raised amount is not more than 5% of the total forming control fillet; the bulging mode is as follows; the height of the circular arc angle is equal to the product of the material thickness and the process over-correction amount, and after the swelling is finished, the smooth transition of 25-40mm is carried out on the peripheral area of the circular bead, so that the integral number transition is gentle, and the reserved trimming area swelling of the smooth transition is formed;
the core forming arc in the core forming arc sharpening is a main control forming arc angle of CAE analysis on a numerical type and comprises a key forming arc and a secondary forming arc with a control effect, a sharpening mode is explored through multiple experiments and is performed by rounding a preferred number sequence of 10 th power of 10, the core forming arc on the male die is sharpened by 1.25 times, meanwhile, a corresponding female die area is amplified by 1.25 times, so that the male die is sharpened, the female die is damaged, and a die cavity of a core forming arc area die is greatly enlarged;
the programming and the numerical control machining are to program a machining program for the male die and program a machining program for the female die, so that the male die and the female die with different shapes are machined, and the numerical control machining is carried out according to a normal high-precision die machining mode;
the method for adjusting the reserved trimming area of the craftsman comprises the following steps: after the die is machined, entering a craftsman debugging stage, and enabling a craftsman to adjust the reserved area and the core arc according to the forming state of a product so that the automobile covering part formed by the die meets the precision requirement;
the shaping and grinding are as follows: and after the precision meets the requirement, carrying out upper and lower die shaping and grinding on the integral die to meet the requirements of joint rate and coloring.
2. The magnesium aluminum alloy automobile panel mould craftsman's skill digital conversion manufacturing method of claim 1, characterized in that: constructing a large-angle strong-pressure convex-concave die behind a non-uniform clearance convex die: for a large-angle change area with the area of more than 5 percent of the total area or the edge area accounting for more than 8 percent of the total circumference, the molded surface of the area of the male die is adducted, and the adduction value is 10 percent of the material thickness; and simultaneously, the material thickness is retracted by 15-20% in the corresponding female die area, and the area forms a strong pressure area of about 10%, so that the area is preferentially contacted and forms strong pressure in the stamping process of the die, and different sequential pressure receiving modes in the same die are created.
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