CN201034870Y - terrace die for inducing vehicle plate surface galling defect experiment and tester - Google Patents
terrace die for inducing vehicle plate surface galling defect experiment and tester Download PDFInfo
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- CN201034870Y CN201034870Y CNU2007200693123U CN200720069312U CN201034870Y CN 201034870 Y CN201034870 Y CN 201034870Y CN U2007200693123 U CNU2007200693123 U CN U2007200693123U CN 200720069312 U CN200720069312 U CN 200720069312U CN 201034870 Y CN201034870 Y CN 201034870Y
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Abstract
The utility model discloses a punch and test equipment which is used in the experiment of inducing the picking defects of automobile plate surface, the test equipment includes an upper bottom plate; a lower bottom plate provided with a via hole; a concave die, which is fixed under the upper bottom plate through a concave die cushion block, the lower end faces of two sides of the concave cavity port are provided with annular grooves; the side is provided with a guide groove; a drawing convex gluten, which is arranged in the annular groove of the concave die; a punch, which is fixed on the upper bottom plate; a punch cushion block, which is fixed on the upper bottom plate and is disposed in the concave cavity structure of the concave die; a backward direction guide block, which is fixed on the lower bottom plate and is arranged on two sides of the concave die; an ejector pin, which passes through the via hole of the lower bottom plate; a blank holding plate which is arranged on the ejector pin and corresponds to two sides of the concave die, the upper end face of one side near the punch is provided with a groove; two sides of the blank holding plate are provided with guide grooves and are combined with the backward direction guide block; a drawing concave gluten, which is arranged in the groove of the blank holding plate. The utility model can be used for evaluating the anti surface picking properties of various automobile steel plates, and also can be used for evaluating the effects of plate surface picking at various forming conditions.
Description
Technical field
The utility model relates to sheet forming technology in the Metal Forming field, particularly a kind of test unit that brings out vehicle plate surface galling defect according to formed features.
Background technology
The automobile lightweight has now become one of focus of research, using high-strength steel sheet is the light-weighted main means of present body outer skin, but the problem of many auto-body panel stamping quality aspect occurred by general steel plate in the high-strength steel sheet transfer process, wherein surface galling is unusual general phenomenon.When cold-rolling steel-plate punch is shaped, when plate is in sliding motion, because plate contact with pressure between mould adhesive wear may take place, at this moment the drip molding surface can be by major injury---and plucking phenomenon, plucking are usually with plate transfer or plastic flow.
Plucking production process complexity, notion for plucking also has many different understandings, what generally admitted at present is the definition of American society association to plucking: plucking is a kind of macroscopic surface damage that produces between the solid of two relative slippages, usually local roughnessization; On initial surface, produce protrusion and often shift or plastic flow, or the both is taken place with material.Plucking all results between the solid of two relative slips with wearing and tearing and has all caused surface damage, so different researchers also has different understanding for both.Kenneth G.Budinski etc. is divided into three kinds of forms to surface damage in the sheet-metal press working process: polish, scrape the scrape along plucking.E.van der Heide etc. is divided into three phases to plucking, incipient stage, sticky lump growth phase and seriously swipe the stage.
Find through literature search prior art, the test unit kind of experimental simulation panel surface galling defect is numerous and diverse, wherein " pin-on-disk " of American Society for testing and materials is the abrasion test device of sole criterionization, " the dull and stereotyped slip " test unit and the U-shaped spare bending apparatus that also has Dutch countries use research institute to propose.Preceding 2 kinds of methods, in promptly " pin-on-disk " method and " the dull and stereotyped slip " method do not belong in the sheet forming scope, the inapplicable research shaping of its method plate surface galling defect.People such as Australian D.M.Fabijanic " Improving the galling resistance ofautomotive stamping tools " (" improve automobile anti-surface damage performance of the diel ") that publish thesis on the 9th phase in 2000 at periodical " Metal Forming " (" metal forming "), this article has been studied the wear resistance of Automobile Plate diel with the U-shaped bending forming method, in experiment, realized simulation to surface damage, but tangible limitation is arranged, it mainly is the straight portion that the panel surface damage only occurs in bending forming, and for the various automobile panel of geometric configuration, its shaping mode is diversified, except that flexural deformation, also has deep-drawing deformation, flange distortion etc., for research vehicle plate surface damage feature bigger limitation is arranged so adopt the flexural deformation of U-shaped spare to simulate die wear (or the anti-surface damage of plate), can not satisfy each factor of research influencing rule and setting up the demand of scientific evaluation surface damage defective fully the surface damage behavior.
Summary of the invention
The purpose of this utility model is to design a kind of test punch and test unit that brings out vehicle plate surface galling defect, can be used to estimate the characteristic of the anti-surface galling of different automotive sheets, also can be used to estimate under the differing formed condition (die surface hardness, roughness, deformation pattern, technological parameter) the influence of panel surface plucking.
For achieving the above object, the technical solution of the utility model is, a kind ofly brings out the test punch of vehicle plate surface galling defect according to formed features, comprise, and a base plate, a convex body is fixed on the base plate, and it comprises that large and small outer convex body connects to form; Concave side wall between the large and small outer convex body forms a recess, and this side sidewall then forms the convex-concave unitized construction that evagination and recess by large and small evagination body sidewall form, and all the other sidewalls are straight wall: large and small outer convex body upper lobes forms the bulging structure; The junction at convex body sidewall and base plate and convex body sidewall and convex body top is the transition of fillet mode, and four jiaos of convex body is fillet.
The radius of corner of described convex body sidewall and back plate connections is greater than the radius of corner of convex body sidewall and junction, convex body top.
Body outer skin is because the specific (special) requirements of outward appearance and rigidity, compare with general stamping parts all have material thin, complex-shaped, mostly be characteristics such as complex space curved surface, physical dimension are big, surface quality requirement height.Body outer skin drawing mode is not simple pull and stretch often, but has the composite deformation pattern of multiple formed features such as pull and stretch, bulging, bending, contraflexure, aligning, flange.
Based on the deficiency of above characteristics and existing experimental provision, the utility model has been considered the various deformation behaviours in the actual body outer skin stamping process.According to the mode of texturing of reality, and, carry out the simulation of various deformation behaviours in conjunction with the means of simulation analysis.
The test punch, adopt geometric configuratioies such as straight flange, " bending " " contraflexure " and " aligning " deformation behaviour in the simulation drawing, its sidewall, short Zhi Bi and long straight wall, the length of straight portion, be used to simulate the influence of other forming mode of adjacent area, the height of straight wall will be considered the length of material sliding distance and the limit forming height of material.
Test is adopted outer salient angle geometric configuration with punch, be used for simulating " pull and stretch " and " bulging " deformation behaviour of drawing, the bottom of the outer convex body of size is mainly " pull and stretch " forming mode, " bulging " forming mode is then contained on the top of outer convex body, and the size of outer convex body fillet is mainly considered the deflection size of " pull and stretch " and " bulging ".
Adopt interior re-entrant angle geometric configuration between the outer convex body of size, be used for simulating " flange " formed features of drawing.
In design, consider that the panel surface plucking is a process of accumulation, the plucking generation and the order of severity thereof are relevant with pull and stretch number of packages (total flux), so the feature drawing depth is big as much as possible, to expect that less number of packages just obtains the plucking phenomenon, is designed to higher value for punch-nose angle in the design;
The plate contour shape is rule as far as possible, curved profile should not occur, reduces laboratory slab preparation work amount and difficulty, and the saddle degree of depth is more shallow in the design.The common employed material thickness scope of body outer skin will be considered in the gap of mould.The design of each spot size wants to embody " pull and stretch ", " bulging " and " plane strain state " of differently strained amount size.
The utility model can make the drawing part realize and the corresponding to 3 D deformation of actual punching press.The size outer convex body top of punch and the fillet that sidewall joins adopt bigger radius of corner, and the fillet that bottom and sidewall join adopts less radius of corner, sidewall adopts " straight wall construction " especially, and wherein a sidewall has adopted the convex-concave composite design, forms indent, evagination geometry.The geometric configuration of the principal character structure of the shape facility of this mould is integrated most car coverings; On deformation behaviour, the length of straight flange of this mould differs greatly, and there is the big corner structure of concave side wall and sidewall, can obtain sheet metal deformation under more stress states, promptly near longer sidewall position, produce approximate " stretching-bending-contraflexure-stretching (aligning) " deformation behaviour, near rotation angle position, produce the deep-drawing deformation feature of " circumferentially compression-sidewall stretches ", near the indent position, produce " stretch flanging (flanging) " deformation behaviour, near big rotation angle position, produce " bulging+pull and stretch " composite deformation feature.The shaping mode more complicated of this mould generation is similar to covering component structure position more jumpy on the whole, contains the main deformation behaviour of most of coverage formings substantially.
Sidewall " straight wall " structure Design:
According to general sidewall design principle, adopting the sidewall oblique angle earlier is 5 °, found that, there is clout in this side top side wall of male structure outside adopting indent, causes this place wrinkling.And after changing sidewall into straight wall, can eliminate the clout packing phenomenon at this place well.
Of the present utility modelly bring out the test unit of vehicle plate surface galling defect, comprise according to formed features, upper plate, lower shoe which is provided with several through holes; Die is fixed under the upper plate by the die cushion block, and a curved cavity is arranged in it, and the lower surface of cavity port both sides is provided with annular recess; This die and die cushion block dual-side also have gathering sill; Draw convex tendon, be fixed in the annular recess of die lower surface; Punch is fixed on the upper plate, corresponding to the curved cavity of die; Punch comprises, a base plate, and a convex body is fixed on the base plate, and it comprises that large and small outer convex body connects to form; Concave side wall between the large and small outer convex body forms a recess, and this side sidewall then forms the convex-concave unitized construction that evagination and recess by large and small evagination body sidewall form, and all the other sidewalls are straight wall; Large and small outer convex body upper lobes forms the bulging structure; The junction at convex body sidewall and base plate and convex body sidewall and convex body top is the transition of fillet mode, and four jiaos of convex body is fillet; The punch cushion block is fixed on the upper plate, is positioned at the curved cavity of die, corresponding to punch; Ejector is arranged between upper plate and the punch cushion block; Two guide blocks dorsad are fixed on the lower shoe, are arranged at the punch both sides respectively; At least two push rods pass the through hole on the lower shoe respectively, are positioned at the punch both sides; The flanging plate is arranged on the push rod, corresponding die both sides, and corresponding die lower surface, the upper surface of its nearly punch one side annular recess has groove; The dual-side of this flanging plate has gathering sill, and with the corresponding cooperation of guide block dorsad.Draw concave bar, be arranged in the flanging plate groove, draw convex tendon in the annular recess of corresponding die lower surface.
Again, the utility model is also established two back up pads, is fixedly connected on two guide blocks dorsad respectively.
Described ejector is a spring.
In conjunction with multiple spot pressure variable edge force pressing machine, according to the formed features part shape size that is adopted, design can realize the utility model test unit of the vehicle plate surface damage simulation pull and stretch of feature part deep-drawing deformation.
Experiment is a single action flip-over type pressing machine with pressing machine, die cushion block and ejector are installed on the upper plate, die is fixed on the die cushion block, drawing convex tendon directly processes at the die working surface, die, die cushion block and ejector can move up and down under the drive of press crown together along with upper plate, and guide block and punch are installed on the lower shoe dorsad, and the flanging plate places on the push rod, can move up and down along guide block dorsad with push rod, the bead concave bar is directly processed at flanging plate workplace.Flanging plate, concave die cavity are with processing, to guarantee proper alignment, and cavity dimension is also identical.Flanging plate, die shape are identical with the outline of punch, and flanging plate and mould between punch, die and the punch keep certain interval, center identical with punch.It is identical with the symcenter that flanging plate working surface draws concave bar that the die workplace draws convex tendon.
Bead is a peculiar structure in most of coverage formings.Simulate covering different parts sheet forming situation more all sidedly with this Drawing Die prodigiosin, and the automobile panel deformation extent various with shape is more close, distortion plate surface damage characteristic under the more changeable shape pattern can be obtained, the requirement of research vehicle plate surface damage feature research can be satisfied.
During drawing, blank places on the flanging plate, die moves downward under the drive of press crown, when die contact blank, the flanging plate moves downward with die, this moment, push rod applied certain upwards snap-in force to the flanging plate, moved downward to descend to make blank deformation become the feature part of expection in snap-in force and die.
After taking out drawing part, the maximum scratch depth of plucking is carried out quantitative evaluation.
Characteristics of the present utility model are:
(1) the concave die cavity contour shape is asymmetric, can form multiple formed features during sheet metal deep drawing, contain multiple formed features such as bending, contraflexure and aligning, flange, pull and stretch and pull and stretch bulging combined shaping, realize bringing out under the various formed features plate plucking and behavioral study thereof;
(2) mould structure is simple, relies on guide block realization motion guide dorsad;
(3), can study the relation between the galling defect and each factor in the body outer skin pull and stretch by changing die surface state (as skin hardness, roughness and mold material etc.), drawing velocity, lubrication state and other process conditions comprehensively.
The utility model has realized that the bringing out of the surface galling defect of the changeable shape pattern of plate had good similarity with actual punching press deformation process.In addition, the utlity model has the characteristic of adjusting the shaping conditional parameter preferably, can further investigate the influence rule of conditions such as die surface hardness, roughness, deformation pattern, technological parameter plucking generation in the shaping of high-strength steel sheet part punching.
Description of drawings
Fig. 1 tests the perspective view of using punch for the utility model one embodiment;
Fig. 2 is the perspective view of the utility model one embodiment test unit;
Fig. 3 is the structure cut-open view before the test of the utility model one embodiment test unit;
Fig. 4 is the structure cut-open view of the utility model one embodiment test unit test;
Fig. 5 is the structure cut-open view after the test of the utility model one embodiment test unit is finished.
Embodiment
Referring to Fig. 1, the test of bringing out vehicle plate surface galling defect according to formed features of the present utility model comprises a base plate 61, one convex bodys 62 with punch 6; Convex body 62 is fixed on the base plate 61, and it comprises that big outer convex body 621, little outer convex body 622 connect to form; Sidewall 623 indents between big outer convex body 621, the little outer convex body 622 form a recess 6231, the convex-concave unitized construction that 623 formation of this side sidewall are formed by the evagination and the recess 6231 of large and small outer convex body 621,622 sidewalls, and all the other sidewalls are straight wall; Large and small outer convex body 621,622 upper lobes form the bulging structure; The junction at convex body 62 sidewalls and base plate 61 and convex body sidewall and convex body top is the transition of fillet mode, and four jiaos of convex body 62 is fillet; The radius of corner of these convex body 62 sidewalls and base plate 61 junctions is greater than the radius of corner of convex body sidewall and junction, convex body top.
Referring to Fig. 2～Fig. 5, the test unit that brings out vehicle plate surface galling defect according to formed features of the present utility model, comprise, upper plate 1, lower shoe 2, die 3, die cushion block 4, draw convex tendon 5, punch 6, punch cushion block 7, dorsad guide block 8,8 ', push rod 9, flanging plate 10, draw concave bar 11, ejector 14.
Draw convex tendon 5, be fixed in 32 annular recess 321 of die lower surface; Punch 6 is fixed on the upper plate 1, corresponding to the curved cavity 31 of die; Punch cushion block 7 is fixed on the upper plate 1, is positioned at the curved cavity 31 of die 3, corresponding to punch 6; This punch cushion block 7 also connects, is slidedly arranged on the upper plate 1 by screw 15; Ejector 14 is arranged between upper plate 1 and the punch cushion block 7, and this ejector adopts spring; Two guide blocks 8,8 ' dorsad are fixed on the lower shoe 2, are arranged at punch 6 both sides respectively; Several push rods 9 pass the through hole 21 on the lower shoe 2 respectively, are positioned at punch 6 both sides; Flanging plate 10 is arranged on the push rod 9, corresponding die 3 both sides, and the upper surface 101 corresponding die lower surface annular recess 321 of its nearly punch 6 one sides have groove 1011; The dual-side 102 of this flanging plate 10 has gathering sill 1021, and with guide block 8,8 ' the corresponding cooperation dorsad; Draw concave bar 11, be arranged in the flanging plate groove 1011, draw convex tendon 5 in the corresponding die 3 lower surface annular recess 321.
Again, the utility model is also established two back up pads 12, is fixedly connected on two guide blocks 8,8 ' dorsad respectively.
Referring to Fig. 4, Fig. 5, upper plate 1 links to each other with press crown, die cushion block 4 is installed on the upper plate 1, ejector 14 is installed on the upper plate 1, die 3 is installed on the die cushion block 4, draw convex tendon 5 on die 3 working surfaces, die 3, die cushion block 4 and ejector 14 can move up and down under the drive of press crown together along with upper plate 1, guide block 8 dorsad, 8 ' is installed on the lower shoe 2, punch 6 is installed on the lower shoe 2, and flanging plate 10 is put on the push rod 9, and by guide block 8 dorsad, 8 ' guiding, can move up and down with push rod 9, draw concave bar 11 on flanging plate 10 working surfaces.High-strength steel sheet 13 is positioned between die 3, the punch 6, and press crown drives upper plate 1 and presses down, die 3, punch 6 mating reactions, and its galling defect is brought out in drawing convex tendon 5, draw concave bar 11 and cooperate high-strength steel sheet 13 effects on it.
By the spring return action of ejector 14, upper plate 1 and die cushion block 4 are strutted again, return back to original state.
Success by the high-strength steel galling defect is brought out, and can deepen the research of the anti-surface galling characteristic of high-strength steel sheet aspect.By the part tension hair characteristic of quantitative evaluation high-strength steel sheet in drawing, helping automobile factory to carry out reliable diel state parameter determines, and raising automobile panel surface quality, reduce the number of times that repairs a die, reduce car stamping parts manufacturing cost, ensure the vehicle performance quality, to advance the stable use of high-strength steel sheet on existing vehicle of automobile factory and new model.
Claims (6)
1. one kind is brought out the test punch of vehicle plate surface galling defect according to formed features, it is characterized in that, comprise,
One base plate,
One convex body is fixed on the base plate, and it comprises that large and small outer convex body connects to form; Concave side wall between the large and small outer convex body forms a recess, and this side sidewall then forms the convex-concave unitized construction that evagination and recess by large and small evagination body sidewall form, and all the other sidewalls are straight wall; Large and small outer convex body upper lobes forms the bulging structure; The junction at convex body sidewall and base plate and convex body sidewall and convex body top is the transition of fillet mode, and four jiaos of convex body is fillet.
2. as claimed in claim 1ly bring out the punch of the test usefulness of vehicle plate surface galling defect, it is characterized in that the radius of corner of described convex body sidewall and back plate connections is greater than the radius of corner of convex body sidewall and junction, convex body top according to formed features.
3. one kind is brought out the test unit of vehicle plate surface galling defect according to formed features, it is characterized in that, comprise,
Upper plate,
Lower shoe which is provided with several through holes;
Die is fixed under the upper plate by the die cushion block, and a curved cavity is arranged in it, and the lower surface of cavity port both sides is provided with annular recess; This die and die cushion block dual-side also have gathering sill;
Draw convex tendon, be fixed in the annular recess of die lower surface;
Punch is fixed on the upper plate, corresponding to the curved cavity of die; It comprises,
One base plate,
One convex body is fixed on the base plate, and it comprises that large and small outer convex body connects to form; Concave side wall between the large and small outer convex body forms a recess, and this side sidewall then forms the convex-concave unitized construction that evagination and recess by large and small evagination body sidewall form, and all the other sidewalls are straight wall; Large and small outer convex body upper lobes forms the bulging structure; The junction at convex body sidewall and base plate and convex body sidewall and convex body top is the transition of fillet mode, and four jiaos of convex body is fillet;
The punch cushion block is fixed on the upper plate, is positioned at the curved cavity of die, corresponding to punch;
Ejector is arranged between upper plate and the punch cushion block;
Two guide blocks dorsad are fixed on the lower shoe, are arranged at the punch both sides respectively;
At least two push rods pass the through hole on the lower shoe respectively, are positioned at the punch both sides;
The flanging plate is arranged on the push rod, corresponding die both sides, and corresponding die lower surface, the upper surface of its nearly punch one side annular recess has groove; The dual-side of this flanging plate has gathering sill, and with the corresponding cooperation of guide block dorsad.
Draw concave bar, be arranged in the flanging plate groove, draw convex tendon in the annular recess of corresponding die lower surface.
4. as claimed in claim 3ly bring out the test unit of vehicle plate surface galling defect, it is characterized in that the convex body sidewall of described punch and the radius of corner of back plate connections are greater than the radius of corner of convex body sidewall and junction, convex body top according to formed features.
5. as claimed in claim 3ly bring out the test unit of vehicle plate surface galling defect, it is characterized in that, also establish two back up pads, be fixedly connected on two guide blocks dorsad respectively according to formed features.
6. as claimed in claim 3ly bring out the test unit of vehicle plate surface galling defect, it is characterized in that described ejector is a spring according to formed features.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200693123U CN201034870Y (en) | 2007-04-25 | 2007-04-25 | terrace die for inducing vehicle plate surface galling defect experiment and tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200693123U CN201034870Y (en) | 2007-04-25 | 2007-04-25 | terrace die for inducing vehicle plate surface galling defect experiment and tester |
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| Publication Number | Publication Date |
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| CN201034870Y true CN201034870Y (en) | 2008-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200693123U Expired - Fee Related CN201034870Y (en) | 2007-04-25 | 2007-04-25 | terrace die for inducing vehicle plate surface galling defect experiment and tester |
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| CN101653808B (en) * | 2009-04-24 | 2011-05-11 | 天津汽车模具股份有限公司 | Tension spring type steel plate locating device for automobile steel plate drawing mould |
| CN102323167A (en) * | 2011-08-16 | 2012-01-18 | 上海交通大学 | Sheet stamping surface damage test apparatus for realizing a plurality of deformation states |
| CN103521585A (en) * | 2013-10-30 | 2014-01-22 | 北京星航机电装备有限公司 | Method and device for thermal deep-drawing of titanium alloy spindle parts |
| CN103691810A (en) * | 2013-11-20 | 2014-04-02 | 无锡曙光模具有限公司 | Stretching forming die for air outlet taper pipe shell of automobile engine exhaust system |
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| CN104614264A (en) * | 2014-12-26 | 2015-05-13 | 上海大学 | Quantitative mold galling damage testing method in stamping formation of thin plate |
| CN104985058A (en) * | 2015-07-14 | 2015-10-21 | 中航飞机股份有限公司西安飞机分公司 | Plate-symmetrical semi-elbow part drawing forming method and die |
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| CN112557131A (en) * | 2019-09-10 | 2021-03-26 | 宝山钢铁股份有限公司 | Method for analyzing and evaluating wear galling of metal surface and insert thereof |
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| CN101653808B (en) * | 2009-04-24 | 2011-05-11 | 天津汽车模具股份有限公司 | Tension spring type steel plate locating device for automobile steel plate drawing mould |
| CN102323167A (en) * | 2011-08-16 | 2012-01-18 | 上海交通大学 | Sheet stamping surface damage test apparatus for realizing a plurality of deformation states |
| CN104338832A (en) * | 2013-07-25 | 2015-02-11 | 北汽福田汽车股份有限公司 | U-shaped beam manufacturing method, U-shaped beam and vehicle with U-shaped beam |
| CN103521585A (en) * | 2013-10-30 | 2014-01-22 | 北京星航机电装备有限公司 | Method and device for thermal deep-drawing of titanium alloy spindle parts |
| CN103691810B (en) * | 2013-11-20 | 2016-07-06 | 无锡曙光模具有限公司 | The drawing forming mold of air outlet taper pipe shell of automobile engine exhaust system |
| CN103691810A (en) * | 2013-11-20 | 2014-04-02 | 无锡曙光模具有限公司 | Stretching forming die for air outlet taper pipe shell of automobile engine exhaust system |
| CN104614264A (en) * | 2014-12-26 | 2015-05-13 | 上海大学 | Quantitative mold galling damage testing method in stamping formation of thin plate |
| CN104985058B (en) * | 2015-07-14 | 2017-06-06 | 中航飞机股份有限公司西安飞机分公司 | A kind of plate system symmetrical half bent pipe parts drawing forming method and shaping dies |
| CN104985058A (en) * | 2015-07-14 | 2015-10-21 | 中航飞机股份有限公司西安飞机分公司 | Plate-symmetrical semi-elbow part drawing forming method and die |
| CN107262584A (en) * | 2017-08-08 | 2017-10-20 | 天津天锻航空科技有限公司 | A kind of customized parameter sheet material bulging assembling die and bulging experimental method |
| CN107262584B (en) * | 2017-08-08 | 2023-07-28 | 天津天锻航空科技有限公司 | Board bulging combined die with adjustable parameters and bulging experimental method |
| CN112557131A (en) * | 2019-09-10 | 2021-03-26 | 宝山钢铁股份有限公司 | Method for analyzing and evaluating wear galling of metal surface and insert thereof |
| CN112557131B (en) * | 2019-09-10 | 2022-08-16 | 宝山钢铁股份有限公司 | Method for analyzing and evaluating wear galling of metal surface and insert thereof |
| CN113634657A (en) * | 2020-04-27 | 2021-11-12 | 宝山钢铁股份有限公司 | Automobile aluminum plate blanking process evaluation device |
| CN113634657B (en) * | 2020-04-27 | 2024-02-13 | 宝山钢铁股份有限公司 | Automobile aluminum plate blanking process evaluation device |
| CN114324741A (en) * | 2020-09-30 | 2022-04-12 | 宝山钢铁股份有限公司 | Roller punching forming rib groove characteristic forming limit evaluation die and evaluation method |
| CN114324741B (en) * | 2020-09-30 | 2024-02-13 | 宝山钢铁股份有限公司 | Evaluation die and evaluation method for characteristic forming limit of roll-punched forming rib groove |
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