CN206763734U - A kind of stamping top cover system - Google Patents

A kind of stamping top cover system Download PDF

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Publication number
CN206763734U
CN206763734U CN201720240364.6U CN201720240364U CN206763734U CN 206763734 U CN206763734 U CN 206763734U CN 201720240364 U CN201720240364 U CN 201720240364U CN 206763734 U CN206763734 U CN 206763734U
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China
Prior art keywords
mould
die
plate
limit column
bolster
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CN201720240364.6U
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Chinese (zh)
Inventor
卢辉
刘志宾
何华彬
赵洪伟
唐梅艳
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Guangzhou Yong League Beijing Great Automotive Components Co Ltd
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Guangzhou Yong League Beijing Great Automotive Components Co Ltd
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Abstract

The utility model discloses a kind of stamping top cover system, pre- punch die is rushed including stretching, macropore is rushed and cuts two mould, turns over perimeter die, trimming and piercing die flanging die, bending hole flanging mold and enlarging Bending Mould, is respectively used to be sequentially completed stretching and rushes pre- hole process, rushes macropore and cut two process, turn over periphery process, trimming and piercing die overturning process, bending hole flanging process and enlarging bending process;The stamping top cover system process step design is reasonable, and mould structure is simple, and stamping parts quality is good, and precision is high.

Description

A kind of stamping top cover system
Technical field
It the utility model is related to a kind of stamping top cover system.
Background technology
Stamping system is the combined system that punching press is carried out to same stamping parts combined by multiple diels.Punching Compression mould, it is a kind of special work that material (metal is nonmetallic) is processed into part (or semi-finished product) in Cold Press Working Skill is equipped, referred to as cold punching die (being commonly called as cold-punching mould).Punching press, it is at room temperature, to utilize the mould pair on forcing press Material applies pressure, it is produced separation or plastic deformation, so as to obtain a kind of pressure processing method of required part.
Air-conditioner top cover is part indispensable in air-conditioning, plays a part of protection to air-conditioning, and profile is generally rectangular, There are two circular ports at middle part, and structure is relatively easy, and the stamping process design and mould structure design of stamping top cover system have various The scheme of various kinds, quality, the precision for the stamping parts that every suit stamping system stamps out are all different, and the utilization rate of material also differs Sample, and the life-span of mould can also be affected.
In the prior art it is unreasonable to there is process step design in stamping top cover system, and mould structure is complicated, and stamping parts is of poor quality, essence Spend the shortcomings that low.
Utility model content
The technical problems to be solved in the utility model is to provide that process step design is reasonable, and mould structure is simple, stamping parts quality It is good, the high stamping top cover system of precision.
To solve the above problems, the utility model adopts the following technical scheme that:
A kind of stamping top cover system, including stretching rush pre- punch die, rush macropore and cut two mould, turn over perimeter die, deburring Piercing and flanging mould, bending hole flanging mold and enlarging Bending Mould, it is respectively used to be sequentially completed stretching and rushes pre- hole process, rushes macropore Cut two process, turn over periphery process, trimming and piercing die overturning process, bending hole flanging process and enlarging bending process.
Preferably, the stretching rushes pre- punch die and includes upper mould one and lower mould one, the upper mould one is from top to bottom successively Including upper mounting plate one, top block one, upper bolster one, upper padding plate one and concave template one, set on the bottom surface of the upper bolster one Have a upper limit column one and guide pillar one, the bottom of upper padding plate one is provided with stretching and rushes pre- vestibule, the lower mould one from bottom to up according to It is secondary including lower installation board one, bottom seat pad one, die shoe one, convex template one and lower de- plate one, set on the top surface of die shoe one There are the lower limit column one being engaged with upper limit column one and the guide pin bushing one being engaged with guide pillar one, set on the top surface of convex template one It is equipped with and rushes the corresponding stretching of pre- vestibule with stretching and rush pre- hole projection.Pre- hole process is rushed for completing stretching, simple in construction, punching Quality is good.
Preferably, it is described rush macropore and cut two mould include upper mould two and lower mould two, the upper mould two from top to bottom according to It is secondary including upper mounting plate two, top block two, upper bolster two, train wheel bridge two and upper de- plate two, set on the bottom surface of upper bolster two There are upper limit column two and guide pillar two, be provided with the bottom surface of train wheel bridge two and rush macropore and cut two drift, the lower mould two is under It is supreme to include lower installation board two, bottom seat pad two, die shoe two, concave template two and lower de- plate two, the top surface of die shoe two successively On be provided with the lower limit column two to match with upper limit column two and the guide pin bushing to match with guide pillar two two, on the concave template two It is provided with and cuts the corresponding macropore that rushes of two drift with rushing macropore and cut two punching.Macropore is rushed for completion and cuts two process, is tied Structure is simple, and punching quality is good.
Preferably, the perimeter die of turning over includes upper mould three and lower mould three, the upper mould three includes successively from top to bottom Upper bolster three, top block three and train wheel bridge three, are provided with upper limit column three and guide pillar three on the bottom surface of upper bolster three, it is described on Be provided with the bottom surface of clamping plate three and turn over periphery punch-pin, the lower mould three from bottom to up successively include lower installation board three, bottom seat pad three, under Die holder three, lower template three and lower de- plate three, the lower limit to match with upper limit column three is provided with the top surface of die shoe three Post three and the guide pin bushing three to match with guide pillar three, it is provided with the top surface of lower template three and corresponding with turning over periphery punch-pin turns over week Edge die.Simple in construction for completing to turn over periphery process, punching quality is good.
Preferably, the trimming and piercing die flanging die includes upper mould four and lower mould four, the upper mould four from top to bottom according to It is secondary including upper mounting plate four, top block four, upper bolster four, train wheel bridge four and mounting plate four, set on the bottom surface of upper bolster four There are upper limit column four and guide pillar four, trimming and piercing die flanging die is provided with the bottom surface of train wheel bridge four, the lower mould four is under It is supreme to include lower installation board four, bottom seat pad four, die shoe four, lower bolster four and lower template four, the top surface of die shoe four successively On be provided with the lower limit column four to match with upper limit column four and the guide pin bushing to match with guide pillar four four, the lower template four is pushed up The trimming and piercing die flange cavity plate corresponding with trimming and piercing die flanging die is provided with face.For completing trimming and piercing die flange work Sequence, simple in construction, punching quality is good.
Preferably, the bending hole flanging mold includes upper mould five and lower mould five, the upper mould five wraps successively from top to bottom Upper bolster five, upper padding plate five, train wheel bridge five and cope plate five are included, upper limit column five is provided with the bottom surface of upper bolster five and is led Post five, is provided with bending Burring Punch on the bottom surface of cope plate five, the lower mould five include successively from bottom to up bottom plate five, Bottom seat pad five, die shoe five, lower plate five and lower de- plate five, it is provided with and the phase of upper limit column five on the top surface of die shoe five The lower limit column five matched somebody with somebody and the guide pin bushing five to match with guide pillar five, it is provided with and bending Burring Punch on the top surface of lower plate five Corresponding bending hole flanging cavity plate.Simple in construction for completing bending hole flanging process, punching quality is good.
Preferably, the enlarging Bending Mould includes upper mould six and lower mould six, the upper mould six wraps successively from top to bottom Upper mounting plate six, top block six, upper bolster six, upper padding plate six and train wheel bridge six are included, is provided with the bottom surface of upper bolster six Limited post six and guide pillar six, are provided with enlarging bending punch-pin on the bottom surface of train wheel bridge six, and the lower mould six is from bottom to up successively Including lower installation board six, bottom seat pad six, die shoe six and lower template six, it is provided with the top surface of die shoe six and upper limit column Six lower limit columns six to match and the guide pin bushing six to match with guide pillar six, are provided with the top surface of lower template six and enlarging is rolled over The corresponding enlarging bending female die of curved punch-pin.Simple in construction for completing enlarging bending process, punching quality is good.
The beneficial effects of the utility model are:The stamping top cover system rushes pre- punch die by being provided with stretching, rushes macropore Cut two mould, turn over perimeter die, trimming and piercing die flanging die, bending hole flanging mold and enlarging Bending Mould, be respectively used to according to Secondary completion stretching rushes pre- hole process, rushes macropore and cut two process, turn over periphery process, trimming and piercing die overturning process, bending hole flanging work Sequence and enlarging bending process, finally stamp out stamping top cover part, carry out stretching first and rush pre- hole process, reduce stretching to follow-up work The precision in the hole of sequence is impacted, while interstitial hole is rushed in advance, improves the precision of part, is rushed macropore and is cut two process to pre- Further punching is big for hole punched, improves punching quality, cuts the material that two is more than, go out the basic configuration of both sides, then turned over Periphery process, flange is carried out to the periphery of part, process step design is reasonable, and trimming and piercing die overturning process is repaiied simultaneously to part Side, punching and flange processing, simplify mould structure, reduce step, improve part quality, bending hole flanging process and enlarging bender Ordered pair part is bent twice, prevents from bending situation not in place, improves the quality of part, improves precision.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings Obtain other accompanying drawings.
Fig. 1 is the front view that pre- punch die is rushed in a kind of stamping top cover system stretching of the utility model.
Fig. 2 is the upward view that mould one on pre- punch die is rushed in a kind of stamping top cover system stretching of the utility model.
Fig. 3 is the top view that mould one under pre- punch die is rushed in a kind of stamping top cover system stretching of the utility model.
Fig. 4 is that a kind of stamping top cover system of the utility model rushes the front view that macropore cuts two mould.
Fig. 5 is that a kind of stamping top cover system of the utility model rushes the upward view that macropore cuts two upper mould two.
Fig. 6 is that a kind of stamping top cover system of the utility model rushes the top view that macropore cuts two lower mould two.
Fig. 7 is the front view that a kind of stamping top cover system of the utility model turns over perimeter die.
Fig. 8 is the upward view that a kind of stamping top cover system of the utility model turns over mould three in perimeter die.
Fig. 9 is the top view that a kind of stamping top cover system of the utility model turns over mould three under perimeter die.
Figure 10 is a kind of front view of stamping top cover system trimming and piercing die flanging die of the utility model.
Figure 11 is the upward view of mould four on a kind of stamping top cover system trimming and piercing die flanging die of the utility model.
Figure 12 is the top view of mould four under a kind of stamping top cover system trimming and piercing die flanging die of the utility model.
Figure 13 is a kind of front view of stamping top cover system bending hole flanging mold of the utility model.
Figure 14 is the upward view of mould five on a kind of stamping top cover system bending hole flanging mold of the utility model.
Figure 15 is the top view of mould five under a kind of stamping top cover system bending hole flanging mold of the utility model.
Figure 16 is a kind of front view of stamping top cover system enlarging Bending Mould of the utility model.
Figure 17 is the upward view of mould six on a kind of stamping top cover system enlarging Bending Mould of the utility model.
Figure 18 is the top view of mould six under a kind of stamping top cover system enlarging Bending Mould of the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.
Embodiment 1
As shown in Fig. 1-18, a kind of stamping top cover system, including stretching rush pre- punch die 1, rush macropore cut two mould 2, Perimeter die 3, trimming and piercing die flanging die 4, bending hole flanging mold 5 and enlarging Bending Mould 6 are turned over, is respectively used to be sequentially completed drawing Stretch and rush pre- hole process, rush macropore and cut two process, turn over periphery process, trimming and piercing die overturning process, bending hole flanging process and enlarging Bending process.
Pre- punch die 1 is rushed in the stretching includes upper mould one and lower mould one, and the upper mould one includes upper peace successively from top to bottom Loading board 1, top block 1, upper bolster 1, upper padding plate 1 and concave template 1, the upper bolster 1 Upper limit column 1 and guide pillar 1 are provided with bottom surface, the bottom of upper padding plate 1 is provided with stretching and rushes pre- vestibule 108, the lower mould one includes lower installation board 1, bottom seat pad 1, die shoe 1, convex template one successively from bottom to up 112 and lower de- plate 1, the lower limit column one being engaged with upper limit column 1 is provided with the top surface of die shoe 1 114 and the guide pin bushing 1 that is engaged with guide pillar 1, it is provided with the top surface of convex template 1 and rushes pre- vestibule with stretching Pre- hole projection 116 is rushed in 108 corresponding stretchings.Pre- hole process is rushed for completing stretching, simple in construction, punching quality is good.
It is described rush macropore and cut two mould 2 include upper mould two and lower mould two, the upper mould two includes upper successively from top to bottom Installing plate 2 201, top block 2 202, upper bolster 2 203, train wheel bridge 2 204 and upper de- plate 2 205, the upper bolster 2 203 Upper limit column 2 206 and guide pillar 2 207 are provided with bottom surface, is provided with the bottom surface of train wheel bridge 2 204 and is rushed macropore and cut two Drift 208, the lower mould two include lower installation board 2 209, bottom seat pad 2 210, die shoe 2 211, cavity plate successively from bottom to up Plate 2 212 and lower de- plate 2 213, the lower limit to match with upper limit column 2 206 is provided with the top surface of die shoe 2 211 Post 2 214 and the guide pin bushing 2 215 to match with guide pillar 2 207, macropore are provided with and rushed on the concave template 2 212 and cut two primary dryings The first 208 corresponding macropores that rush cut two punching 216.Macropore, which is rushed, for completion cuts two process, it is simple in construction, it is punched quality It is good.
The perimeter die 3 of turning over includes upper mould three and lower mould three, and the upper mould three includes upper bolster three successively from top to bottom 301st, top block 3 302 and train wheel bridge 3 303, upper limit column 3 304 and guide pillar three are provided with the bottom surface of upper bolster 3 301 305, it is provided with the bottom surface of train wheel bridge 3 303 and turns over periphery punch-pin 306, the lower mould three includes lower installation successively from bottom to up Plate 3 307, bottom seat pad 3 308, die shoe 3 309, lower template 3 310 and lower de- plate 3 311, the top surface of die shoe 3 309 On be provided with the lower limit column 3 312 to match with upper limit column 3 304 and the guide pin bushing to match with guide pillar 3 305 3 313, institute State to be provided with the top surface of lower template 3 310 and corresponding with turning over periphery punch-pin 306 turn over all edge dies 314.For completing to turn over periphery Process, simple in construction, punching quality is good.
The trimming and piercing die flanging die 4 includes upper mould four and lower mould four, and the upper mould four includes upper successively from top to bottom Installing plate 4 401, top block 4 402, upper bolster 4 403, train wheel bridge 4 404 and mounting plate 4 405, the upper bolster 4 403 Upper limit column 4 406 and guide pillar 4 407 are provided with bottom surface, trimming and piercing die flange is provided with the bottom surface of train wheel bridge 4 404 Punch-pin 408, the lower mould four include lower installation board 4 409, bottom seat pad 4 410, die shoe 4 411, underlay successively from bottom to up Plate 4 412 and lower template 4 413, the lower limit to match with upper limit column 4 406 is provided with the top surface of die shoe 4 411 Post 4 414 and the guide pin bushing 4 415 to match with guide pillar 4 407, it is provided with the top surface of lower template 4 413 and is turned over trimming and piercing die The corresponding trimming and piercing die flange cavity plate 416 of side punch-pin 408.It is simple in construction for completing trimming and piercing die overturning process, it is punched matter Measure.
The bending hole flanging mold 5 includes upper mould five and lower mould five, and the upper mould five includes upper bolster successively from top to bottom 5 501, upper padding plate 5 502, train wheel bridge 5 503 and cope plate 5 504, upper limit is provided with the bottom surface of upper bolster 5 501 Post 5 505 and guide pillar 5 506, bending Burring Punch 507 are provided with the bottom surface of cope plate 5 504, the lower mould five is under It is supreme to include bottom plate 5 508, bottom seat pad 5 509, die shoe 5 510, lower plate 5 511 and lower de- plate 5 512 successively, it is described Be provided with the top surface of die shoe 5 510 lower limit column 5 513 that matches with upper limit column 5 505 and with the phase of guide pillar 5 506 The guide pin bushing 5 514 matched somebody with somebody, it is recessed that the bending hole flanging corresponding with bending Burring Punch 507 is provided with the top surface of lower plate 5 511 Mould 515.Simple in construction for completing bending hole flanging process, punching quality is good.
The enlarging Bending Mould 6 includes upper mould six and lower mould six, and the upper mould six includes upper installation successively from top to bottom Plate 6 601, top block 6 602, upper bolster 6 603, upper padding plate 6 604 and train wheel bridge 6 605, the bottom surface of upper bolster 6 603 On be provided with upper limit column 6 606 and guide pillar 6 607, be provided with enlarging bending punch-pin 608 on the bottom surface of train wheel bridge 6 605, The lower mould six includes lower installation board 6 609, bottom seat pad 6 610, die shoe 6 611 and lower template 6 612 successively from bottom to up, Be provided with the top surface of die shoe 6 611 lower limit column 6 613 that matches with upper limit column 6 606 and with guide pillar 6 607 The guide pin bushing 6 614 to match, the enlarging folding corresponding with enlarging bending punch-pin 608 is provided with the top surface of lower template 6 612 Curved cavity plate 615.Simple in construction for completing enlarging bending process, punching quality is good.
The beneficial effects of the utility model are:The stamping top cover system rushes pre- punch die by being provided with stretching, rushes macropore Cut two mould, turn over perimeter die, trimming and piercing die flanging die, bending hole flanging mold and enlarging Bending Mould, be respectively used to according to Secondary completion stretching rushes pre- hole process, rushes macropore and cut two process, turn over periphery process, trimming and piercing die overturning process, bending hole flanging work Sequence and enlarging bending process, finally stamp out stamping top cover part, carry out stretching first and rush pre- hole process, reduce stretching to follow-up work The precision in the hole of sequence is impacted, while interstitial hole is rushed in advance, improves the precision of part, is rushed macropore and is cut two process to pre- Further punching is big for hole punched, improves punching quality, cuts the material that two is more than, go out the basic configuration of both sides, then turned over Periphery process, flange is carried out to the periphery of part, process step design is reasonable, and trimming and piercing die overturning process is repaiied simultaneously to part Side, punching and flange processing, simplify mould structure, reduce step, improve part quality, bending hole flanging process and enlarging bender Ordered pair part is bent twice, prevents from bending situation not in place, improves the quality of part, improves precision.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to In this, any change or replacement expected without creative work, should all cover within the scope of protection of the utility model.

Claims (6)

  1. A kind of 1. stamping top cover system, it is characterised in that:Pre- punch die is rushed including stretching, macropore is rushed and cuts two mould, turns over periphery Mould, trimming and piercing die flanging die, bending hole flanging mold and enlarging Bending Mould, it is respectively used to be sequentially completed stretching and rushes pre- hole work Sequence, rush macropore and cut two process, turn over periphery process, trimming and piercing die overturning process, bending hole flanging process and enlarging bending process;Institute Stating stretching and rushing pre- punch die includes upper mould one and lower mould one, and the upper mould one includes upper mounting plate one, upper pad successively from top to bottom Pin one, upper bolster one, upper padding plate one and concave template one, upper limit column one and guide pillar are provided with the bottom surface of the upper bolster one One, the bottom of upper padding plate one is provided with stretching and rushes pre- vestibule, the lower mould one include successively from bottom to up lower installation board one, under Feet one, die shoe one, convex template one and lower de- plate one, it is provided with the top surface of die shoe one and is engaged with upper limit column one Lower limit column one and the guide pin bushing one that is engaged with guide pillar one, be provided with the top surface of convex template one and rush pre- vestibule phase with stretching Pre- hole projection is rushed in corresponding stretching.
  2. A kind of 2. stamping top cover system according to claim 1, it is characterised in that:It is described rush macropore and cut two mould include Upper mould two and lower mould two, the upper mould two include upper mounting plate two, top block two, upper bolster two, train wheel bridge successively from top to bottom Two and upper de- plate two, upper limit column two and guide pillar two are provided with the bottom surface of upper bolster two, are set on the bottom surface of train wheel bridge two Be equipped with and rush macropore and cut two drift, the lower mould two include successively from bottom to up lower installation board two, bottom seat pad two, die shoe two, Concave template two and lower de- plate two, be provided with the top surface of die shoe two lower limit column two that matches with upper limit column two and with The guide pin bushing two that guide pillar two matches, it is provided with the concave template two and cuts the corresponding macropore that rushes of two drift with rushing macropore and cut two Primary drying hole.
  3. A kind of 3. stamping top cover system according to claim 1, it is characterised in that:The perimeter die of turning over includes upper mould three With lower mould three, the upper mould three includes upper bolster three, top block three and train wheel bridge three, the bottom of upper bolster three successively from top to bottom Upper limit column three and guide pillar three are provided with face, is provided with the bottom surface of train wheel bridge three and turns over periphery punch-pin, the lower mould three from Under it is supreme include lower installation board three, bottom seat pad three, die shoe three, lower template three and lower de- plate three successively, the die shoe three pushes up The lower limit column three to match with upper limit column three and the guide pin bushing to match with guide pillar three three, the lower template three are provided with face It is provided with top surface and corresponding with turning over periphery punch-pin turns over all edge dies.
  4. A kind of 4. stamping top cover system according to claim 1, it is characterised in that:The trimming and piercing die flanging die includes Upper mould four and lower mould four, the upper mould four include upper mounting plate four, top block four, upper bolster four, train wheel bridge successively from top to bottom Four and mounting plate four, upper limit column four and guide pillar four are provided with the bottom surface of upper bolster four, are set on the bottom surface of train wheel bridge four Be equipped with trimming and piercing die flanging die, the lower mould four include successively from bottom to up lower installation board four, bottom seat pad four, die shoe four, Lower bolster four and lower template four, be provided with the top surface of die shoe four lower limit column four that matches with upper limit column four and with The guide pin bushing four that guide pillar four matches, the deburring punching corresponding with trimming and piercing die flanging die is provided with the top surface of lower template four Hole flanging cavity plate.
  5. A kind of 5. stamping top cover system according to claim 1, it is characterised in that:The bending hole flanging mold includes upper mould Five and lower mould five, the upper mould five include upper bolster five, upper padding plate five, train wheel bridge five and cope plate five, institute successively from top to bottom State and upper limit column five and guide pillar five are provided with the bottom surface of upper bolster five, it is convex to be provided with bending hole flanging on the bottom surface of cope plate five Mould, the lower mould five include bottom plate five, bottom seat pad five, die shoe five, lower plate five and lower de- plate five, institute successively from bottom to up State and be provided with the lower limit column five to match with upper limit column five and the guide pin bushing to match with guide pillar five five on the top surface of die shoe five, The bending hole flanging cavity plate corresponding with bending Burring Punch is provided with the top surface of lower plate five.
  6. A kind of 6. stamping top cover system according to claim 1, it is characterised in that:The enlarging Bending Mould includes upper mould Six and lower mould six, the upper mould six includes upper mounting plate six, top block six, upper bolster six, the and of upper padding plate six successively from top to bottom Train wheel bridge six, upper limit column six and guide pillar six are provided with the bottom surface of upper bolster six, is provided with the bottom surface of train wheel bridge six Enlarging bending punch-pin, the lower mould six include lower installation board six, bottom seat pad six, die shoe six and lower template successively from bottom to up Six, the lower limit column six to match with upper limit column six is provided with the top surface of die shoe six and is led with what guide pillar six matched Six are covered, the enlarging bending female die corresponding with enlarging bending punch-pin is provided with the top surface of lower template six.
CN201720240364.6U 2017-03-13 2017-03-13 A kind of stamping top cover system Active CN206763734U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109590390A (en) * 2018-11-27 2019-04-09 格力电器(郑州)有限公司 A kind of cupping tool and the part drawing forming method with muscle
CN111085628A (en) * 2019-12-31 2020-05-01 天津市津兆机电开发有限公司 Manufacturing method of upper cover product of hybrid electric vehicle integrated control system box

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109590390A (en) * 2018-11-27 2019-04-09 格力电器(郑州)有限公司 A kind of cupping tool and the part drawing forming method with muscle
CN109590390B (en) * 2018-11-27 2020-01-31 珠海格力电器股份有限公司 deep drawing die and part deep drawing forming method with ribs
CN111085628A (en) * 2019-12-31 2020-05-01 天津市津兆机电开发有限公司 Manufacturing method of upper cover product of hybrid electric vehicle integrated control system box

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