CN112139363B - Stamping forming die for automobile front cross beam tube - Google Patents
Stamping forming die for automobile front cross beam tube Download PDFInfo
- Publication number
- CN112139363B CN112139363B CN202010849143.5A CN202010849143A CN112139363B CN 112139363 B CN112139363 B CN 112139363B CN 202010849143 A CN202010849143 A CN 202010849143A CN 112139363 B CN112139363 B CN 112139363B
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- die set
- fixed
- semicircular
- beam tube
- jacks
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/14—Particular arrangements for handling and holding in place complete dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
Abstract
The invention provides a stamping forming die of an automobile front beam tube, which belongs to the technical field of stamping dies and comprises a press connecting column, wherein a connecting rod is fixed at the lower end of the press connecting column, an upper tooth plate is fixed at the lower end of the connecting rod, two sliding holes are formed in the upper end of the upper tooth plate, guide posts are movably inserted in the two sliding holes, a lower retaining plate is fixed at the lower end of the two guide posts, the lower end of the upper tooth plate is connected with an upper die set through two fixing screw threads, stabilizing blocks are fixed at the left end and the right end of the upper die set, the two fixing screw threads are respectively arranged in the two stabilizing blocks, a lower die set is connected with the upper end of the lower retaining plate through four fixing screw threads, a front beam tube is arranged between the lower die set and the upper die set, the front end, the left end and the right end of the lower die set are respectively provided with the stabilizing blocks, the whole device is ingenious in structure setting, flexible in loading and unloading, and good in limiting effect on the die set.
Description
Technical Field
The invention belongs to the technical field of stamping dies, and particularly relates to a stamping forming die for an automobile front beam tube.
Background
The stamping die is a special technological equipment for processing materials (metal or nonmetal) into parts (or semi-finished products) in cold stamping, called cold stamping die (commonly called cold stamping die), and is a pressure processing method for obtaining required parts by applying pressure to the materials at room temperature by using a die arranged on a press machine to separate or plastically deform the materials.
However, when the traditional stamping is used for processing the automobile front beam pipe, most of the dies are easy to fall off after being used for a long time at the connecting part of the dies and the press, the lower die set is easy to deviate, and a large industrial accident can be formed if serious, so that the safety of operators is not guaranteed.
Disclosure of Invention
The invention aims to provide a stamping forming die for an automobile front beam pipe, which aims to solve the problems that in the prior art, when the automobile front beam pipe is processed by traditional stamping, most of dies are easy to fall off after long-time use of the connecting part of the dies and a press machine, the lower die set is easy to deviate, a large industrial accident is formed in serious cases, the safety of operators is not guaranteed and the like.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a stamping forming die of car front beam pipe includes the press spliced pole, the lower extreme of press spliced pole is fixed with the connecting rod, the lower extreme of connecting rod is fixed with the dental lamina, two slide holes have been seted up to the upper end of dental lamina, two all movable grafting has the guide post in the slide hole, two the lower extreme of guide post is fixed with down and holds the board, the lower extreme of dental lamina has the upper die set through two fixing screw threaded connection, the both ends all are fixed with the stabilizer, and two fixing screw set up respectively in two stabilizers, the upper end of lower face guard has the lower module through four fixing screw threaded connection, be provided with front beam pipe between lower module and the upper die set, the front and back of lower module all is provided with the stabilizer, and four lower modules all set up in the stabilizer, be provided with stop gear down on the face guard, be provided with joint mechanism on the upper face guard.
As one preferable mode of the invention, the limiting mechanism comprises two semicircular jacks, two semicircular bolts, two cross jacks and two cross bolts, wherein the two semicircular jacks are respectively arranged at the lower end of the lower resisting plate, the two semicircular bolts are respectively fixed at the lower end of the lower module, the two semicircular jacks are respectively matched with the two semicircular bolts, the cross jacks are respectively arranged at the lower end of the lower resisting plate, the cross bolts are respectively fixed at the lower end of the lower module, and the cross bolts are respectively matched with the cross jacks.
As one preferable mode of the invention, the clamping mechanism comprises a clamping groove and a card, wherein the clamping groove is formed in the front end of the upper dental lamina, the card is movably inserted into the clamping groove, the upper end of the upper module is provided with a clamping block extending upwards, and the card penetrates through the clamping block.
In one preferable aspect of the present invention, a handle is fixed to an upper end of the card, and a rubber sleeve is provided on a surface of the handle.
As a preferable mode of the invention, the lower end of the upper module is provided with an upper forming groove, and the upper end of the lower module is provided with a lower forming groove.
As one preferable aspect of the present invention, an electromagnet is mounted at the upper end of the upper dental plate, and the electromagnet is electrically connected with an external power supply.
As one preferable mode of the invention, the connecting parts of the two guide posts and the lower retaining plate are respectively fixed with a fixing ring.
In a preferred embodiment of the present invention, nuts are screwed to the plurality of fixing screws.
Preferably, the sum of the depths of the lower forming groove and the upper forming groove is the same as the height of the front beam tube.
As one preferable mode of the invention, the electromagnet is arranged in the middle of the upper end of the upper tooth plate, and the electromagnet is matched with the upper die set.
Compared with the prior art, the invention has the beneficial effects that:
1. in this scheme, whole device structure sets up ingenious, loading and unloading are nimble, it is better with spacing effect to the fixed of mould, can not take place unexpected situations such as last module drops or lower module skew take place, greatly improved device safety performance, the joint mechanism in the device has further ensured the connection steadiness of last module and top board simultaneously, the electro-magnet on the top board also can play certain effect to cope match-plate pattern connection stability simultaneously, the setting of electro-magnet also can prevent that the device from taking place at the unexpected situations that the lower shaping groove in the preceding crossbeam pipe card goes into the lower bolster after punching press to preceding crossbeam pipe, stop gear between lower butt plate and the lower module also can effectively prevent that the device from taking place the position offset with lower butt plate after the multiple use, lead to punching press finished product precision inadequately.
2. In this scheme, when using the device, can drive the press spliced pole through the start-up press and move down, thereby make the connecting rod drive whole upper dental lamina along two guide posts at two downthehole orientation down movements, when fixing the upper die set under the upper dental lamina and fixing the lower die set on the lower butt plate and contact, upper shaping groove and the lower shaping groove in upper die set and lower die set can the stamping forming become the front beam pipe directly, accomplish the punching press after, can open the electro-magnet, make the electro-magnet produce the appeal to upper die set and the front beam pipe in the upper shaping groove, the in-process that the press risees makes the electro-magnet outage, can effectively prevent that the device from going out the unexpected condition emergence of falling to the lower shaping groove in the lower bolster after punching press the front beam pipe card goes into the lower die set, and the operation is more convenient, still be provided with joint mechanism in the upper dental lamina simultaneously, the card in the joint mechanism runs through the draw-in groove and the joint piece of module on the draw-in groove, let upper die set and upper dental lamina connect more firm with upper dental lamina, the connection, the interior butt plate can be fixed with two cross die sets up two lower cross die sets and two jack pairs of jack and jack pairs under the cross die set up and two jack pairs under the cross die set and can take place under the jack pair of jack pairs, two jack pairs and two jack pairs are fixed down, can take place well down the jack pairs and can be fixed with the jack pair down.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a first perspective view of the present invention;
FIG. 3 is a second perspective view of the present invention;
FIG. 4 is a third perspective view of the present invention;
fig. 5 is a front view of the present invention.
In the figure: 1-a press connection column; 2-connecting rods; 3-upper dental plate; 4-slide holes; 5-a guide post; 6-fixing rings; 7-a lower retaining plate; 8-an electromagnet; 9-clamping grooves; 10-card; 11-fixing the screw; 12-nut; 13-front cross beam tube; 14-a lower module; 15-a lower forming groove; 16-a stabilization block; 17-an upper module; 18-upper forming grooves; 19-semicircular jacks; 20-semicircle bolts; 21-a cross jack; 22-cross bolt; 23-handle.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1, the present invention provides the following technical solutions: the stamping forming die of the automobile front beam tube comprises a press connecting column 1, a connecting rod 2 is fixed at the lower end of the press connecting column 1, an upper tooth plate 3 is fixed at the lower end of the connecting rod 2, two sliding holes 4 are formed in the upper end of the upper tooth plate 3, guide columns 5 are movably inserted in the two sliding holes 4, lower end of the two guide columns 5 is fixedly provided with a lower abutment plate 7, the lower end of the upper tooth plate 3 is connected with an upper die set 17 through two fixing screws 11 in a threaded manner, stabilizing blocks 16 are respectively fixed at the left end and the right end of the upper die set 17, two fixing screws 11 are respectively arranged in the two stabilizing blocks 16, a lower die set 14 is connected with the upper end of the lower abutment plate 7 through four fixing screws 11 in a threaded manner, a front beam tube 13 is arranged between the lower die set 14 and the upper die set 17, the front end, the rear end and the left end of the lower die set 14 are respectively provided with stabilizing blocks 16, the four lower die sets 14 are respectively arranged in the stabilizing blocks 16, the lower abutment plate 7 is provided with a limiting mechanism, and the upper tooth plate 3 is provided with a clamping mechanism.
In the specific embodiment of the invention, the whole device is ingenious in structure setting, flexible in assembly and disassembly, good in fixing and limiting effects on the die, free of accidents such as falling of an upper die set or deviation of a lower die set and the like, and capable of greatly improving the use safety performance of the device, meanwhile, a clamping mechanism in the device further ensures the connection stability of the upper die set and an upper pressing plate, meanwhile, an electromagnet 8 on the upper pressing plate can play a certain role in the connection stability of the upper die set, the electromagnet 8 can also prevent accidents that the device cannot be clamped into a lower forming groove 15 in a lower die set after a front beam tube 13 is punched, and a limiting mechanism between the lower retaining plate 7 and the lower retaining plate 14 can also effectively prevent the device from generating position deviation between the lower die set 14 and the lower retaining plate 7 after the device is used for multiple times, so that the punching finished product precision is insufficient.
Specifically please combine fig. 2 and 4 to show, stop gear includes semicircle jack 19, semicircle bolt 20, cross jack 21 and cross bolt 22, semicircle jack 19 and semicircle bolt 20 all are provided with two, and two semicircle jacks 19 all are seted up in the lower extreme of lower face guard 7, and two semicircle bolts 20 all are fixed in the lower extreme of lower module 14, and two semicircle jacks 19 respectively with two semicircle bolts 20 assorted, cross jack 21 is seted up in the lower extreme of lower face guard 7, and cross bolt 22 is fixed in the lower extreme of lower module 14, and cross bolt 22 assorted in cross jack 21.
In this embodiment: the limiting mechanism between the lower retaining plate 7 and the lower module 14 can insert two semicircular bolts 20 and one cross bolt 22 under the lower module 14 in alignment with two semicircular jacks 19 and one cross jack 21 on the lower retaining plate 7 when being installed, and the limiting mechanism can also effectively prevent the device from shifting the positions of the lower module 14 and the lower retaining plate 7 after being used for multiple times, so that the stamping finished product precision is insufficient.
Specifically please combine the fig. 1 to show, the joint mechanism includes draw-in groove 9 and card 10, and the front end of tooth board 3 is offered to the draw-in groove 9, and card 10 activity grafting is in draw-in groove 9, and the upper end of last module 17 is provided with the joint piece that upwards extends, and in the card 10 runs through the joint piece.
In this embodiment: the clamping mechanism arranged in the upper dental plate 3 in the device, the card 10 in the clamping mechanism penetrates through the clamping groove 9 and is connected with the clamping block of the upper module 17 in the clamping groove 9, so that the upper module 17 is more firmly connected with the upper dental plate 3.
Referring specifically to fig. 1 and 3, a handle 23 is fixed to the upper end of the card 10, and a rubber sleeve is provided on the surface of the handle 23.
In this embodiment: the arrangement of the handle 23 improves the operation convenience of the clamping mechanism in the device.
Referring to fig. 1 and 2, an upper molding groove 18 is formed at the lower end of the upper module 17, and a lower molding groove 15 is formed at the upper end of the lower module 14.
In this embodiment: the upper forming groove 18 and the lower forming groove 15 are arranged for forming the front beam tube 13 when the press is used for stamping, the lower forming groove 15 is the lower half part of the front beam tube 13, the upper forming groove 18 is the upper half part of the front beam tube 13, and the design has the advantage that the front beam tube 13 is not clamped in the lower forming groove 15 or the upper forming groove 18 after being formed, so that a workpiece is taken more easily.
Specifically, referring to fig. 1, an electromagnet 8 is mounted at the upper end of the upper dental plate 3, and the electromagnet 8 is electrically connected with an external power supply.
In this embodiment: the setting of electro-magnet 8 is after opening electro-magnet 8, produces the appeal to the front beam pipe 13 in last module 17 and the last shaping groove 18, at the in-process that the press risees, makes electro-magnet 8 outage, can effectively prevent that the device from going out the unexpected condition emergence of the lower shaping groove 15 in the lower bolster of front beam pipe 13 card income lower bolster after punching press to front beam pipe 13, and the operation is more convenient, and electro-magnet 8 inner structure is prior art, does not make too much here and describe.
Referring to fig. 1 and 5, fixing rings 6 are fixed at the connection positions of the two guide posts 5 and the lower retaining plate 7.
In this embodiment: the arrangement of the two fixing rings 6 enables the lower retaining plate 7 to be connected with the two guide posts 5 more tightly, and the two guide posts 5 cannot deviate.
Referring specifically to fig. 1 and 4, nuts 12 are screwed on the plurality of fixing screws 11.
In this embodiment: the provision of a plurality of nuts 12 further improves the stability of the connection of the two modules to the press plate.
Referring specifically to fig. 1 and 5, the sum of the depths of the lower molding groove 15 and the upper molding groove 18 is the same as the height of the front cross member duct 13.
In this embodiment: the sum of the depths of the lower molding groove 15 and the upper molding groove 18 is the same as the height of the front cross member tube 13, so that the press molding accuracy of the apparatus can be ensured.
Referring to fig. 1 and 3 specifically, the electromagnet 8 is disposed in the middle of the upper end of the upper dental plate 3, and the electromagnet 8 is matched with the upper module 17.
In this embodiment: the electromagnet 8 is arranged in the middle of the upper end of the upper tooth plate 3, so that the attractive force of the electromagnet 8 on the upper module 17 can be effectively improved.
The working principle and the using flow of the invention are as follows: when the device is used, the press connecting column 1 can be driven to move downwards by starting the press, so that the connecting rod 2 drives the whole upper dental plate 3 to move downwards along the directions of the two guide columns 5 in the two slide holes 4, when the upper die set 17 fixed below the upper dental plate 3 is contacted with the lower die set 14 fixed on the lower retaining plate 7, the upper forming groove 18 and the lower forming groove 15 in the upper die set 17 and the lower die set 14 can be directly punched and formed into the front cross beam tube 13, after the punching is finished, the electromagnet 8 can be started, the electromagnet 8 can generate attractive force on the upper die set 17 and the front cross beam tube 13 in the upper forming groove 18, in the process of lifting the press, the electromagnet 8 is powered off, the unexpected situation that the device cannot be clamped into the lower forming groove 15 in the lower die set after the front cross beam tube 13 is punched, the operation is more convenient, meanwhile, the clamping mechanism 10 in the clamping mechanism penetrates through the clamping groove 9 and is connected with the clamping block 17 in the clamping groove 9, the upper die set 17 and the lower die set 17 is connected with the lower die set 3, the lower die set 17 and the lower die set 14 can be further fixed on the lower die set 14 and the lower die set 20 by the two semicircular plate 14, and the position of the semicircular plate can be more firmly arranged between the two semicircular plates 7 and the two semicircular plates 14, and the two semicircular plates can be stably arranged, and the position of the semicircular plate can be more stably fixed by the two semicircular plates can be ensured, and the two semicircular plate can be stably arranged between the two semicircular plates and the two semicircular plates can be stably and can be stably arranged.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a stamping forming mould of car front cross beam pipe which characterized in that: the novel connecting device comprises a press connecting column (1), wherein a connecting rod (2) is fixed at the lower end of the press connecting column (1), an upper tooth plate (3) is fixed at the lower end of the connecting rod (2), two sliding holes (4) are formed in the upper end of the upper tooth plate (3), guide columns (5) are movably inserted in the sliding holes (4), lower transverse beam tubes (13) are fixed at the lower ends of the guide columns (5), an upper die set (17) is connected at the lower ends of the upper tooth plate (3) through two fixing screws (11) in a threaded manner, stabilizing blocks (16) are fixed at the left end and the right end of the upper die set (17), the two fixing screws (11) are respectively arranged in the two stabilizing blocks (16), lower die sets (14) are connected at the upper ends of the lower transverse beam tubes (14) through four fixing screws (11) in a threaded manner, front transverse beam tubes (13) are arranged between the lower die sets (14) and the upper die set (17), and the upper die set (16) are fixedly connected at the left end and the right end of the lower die set (14) through the two fixing screws (11), and the upper tooth plates (16) are arranged in the stabilizing blocks (16) respectively;
the limiting mechanism comprises semicircular jacks (19), semicircular bolts (20), cross jacks (21) and cross bolts (22), wherein two semicircular jacks (19) and two semicircular bolts (20) are arranged, the two semicircular jacks (19) are arranged at the lower end of the lower resisting plate (7), the two semicircular bolts (20) are fixed at the lower end of the lower module (14), the two semicircular jacks (19) are respectively matched with the two semicircular bolts (20), the cross jacks (21) are arranged at the lower end of the lower resisting plate (7), the cross bolts (22) are fixed at the lower end of the lower module (14), and the cross bolts (22) are matched with the cross jacks (21);
the clamping mechanism comprises a clamping groove (9) and a card (10), the clamping groove (9) is formed in the front end of the upper dental lamina (3), the card (10) is movably inserted into the clamping groove (9), the upper end of the upper module (17) is provided with a clamping block extending upwards, and the card (10) penetrates through the clamping block;
an upper forming groove (18) is formed in the lower end of the upper module (17), and a lower forming groove (15) is formed in the upper end of the lower module (14);
an electromagnet (8) is arranged at the upper end of the upper dental plate (3), and the electromagnet (8) is electrically connected with an external power supply.
2. The stamping forming die of the automobile front cross beam tube according to claim 1, wherein: the upper end of the card (10) is fixed with a handle (23), and the surface of the handle (23) is provided with a rubber sleeve.
3. The stamping forming die of the automobile front cross beam tube according to claim 1, wherein: the connection parts of the two guide posts (5) and the lower retaining plates (7) are respectively fixed with a fixing ring (6).
4. A stamping die for a front cross beam tube of an automobile as claimed in claim 3, wherein: nuts (12) are connected to the fixing screws (11) in a threaded mode.
5. The stamping forming die for a front cross beam tube of an automobile according to claim 4, wherein: the sum of the depths of the lower forming groove (15) and the upper forming groove (18) is the same as the height of the front beam tube (13).
6. The stamping forming die for the front cross beam tube of the automobile according to claim 5, wherein: the electromagnet (8) is arranged in the middle of the upper end of the upper tooth plate (3), and the electromagnet (8) is matched with the upper die set (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010849143.5A CN112139363B (en) | 2020-08-21 | 2020-08-21 | Stamping forming die for automobile front cross beam tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010849143.5A CN112139363B (en) | 2020-08-21 | 2020-08-21 | Stamping forming die for automobile front cross beam tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112139363A CN112139363A (en) | 2020-12-29 |
| CN112139363B true CN112139363B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010849143.5A Active CN112139363B (en) | 2020-08-21 | 2020-08-21 | Stamping forming die for automobile front cross beam tube |
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| Country | Link |
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| CN (1) | CN112139363B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003191029A (en) * | 2001-12-25 | 2003-07-08 | Seiko Epson Corp | Method for mounting press die, press die and press |
| CN204996988U (en) * | 2015-08-07 | 2016-01-27 | 曲靖维拓科技有限公司 | Two step pipe heading moulds |
| CN208288789U (en) * | 2018-01-13 | 2018-12-28 | 董军辉 | A kind of stamping die of intra-threshold connection plate of automobile |
| CN209680919U (en) * | 2019-01-24 | 2019-11-26 | 天津鹏创科技有限公司 | A kind of stamping die for preventing upper/lower die from shifting |
| CN210082279U (en) * | 2018-12-18 | 2020-02-18 | 苏州瑞尔福精密模具有限公司 | Mold for producing refrigerator door |
| CN210358754U (en) * | 2019-08-21 | 2020-04-21 | 青岛庆隆机械科技有限公司 | Metal material stamping die convenient for blanking |
-
2020
- 2020-08-21 CN CN202010849143.5A patent/CN112139363B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003191029A (en) * | 2001-12-25 | 2003-07-08 | Seiko Epson Corp | Method for mounting press die, press die and press |
| CN204996988U (en) * | 2015-08-07 | 2016-01-27 | 曲靖维拓科技有限公司 | Two step pipe heading moulds |
| CN208288789U (en) * | 2018-01-13 | 2018-12-28 | 董军辉 | A kind of stamping die of intra-threshold connection plate of automobile |
| CN210082279U (en) * | 2018-12-18 | 2020-02-18 | 苏州瑞尔福精密模具有限公司 | Mold for producing refrigerator door |
| CN209680919U (en) * | 2019-01-24 | 2019-11-26 | 天津鹏创科技有限公司 | A kind of stamping die for preventing upper/lower die from shifting |
| CN210358754U (en) * | 2019-08-21 | 2020-04-21 | 青岛庆隆机械科技有限公司 | Metal material stamping die convenient for blanking |
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| Publication number | Publication date |
|---|---|
| CN112139363A (en) | 2020-12-29 |
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