CN108580637A - A kind of decompressor with buffer protection function - Google Patents
A kind of decompressor with buffer protection function Download PDFInfo
- Publication number
- CN108580637A CN108580637A CN201810787284.1A CN201810787284A CN108580637A CN 108580637 A CN108580637 A CN 108580637A CN 201810787284 A CN201810787284 A CN 201810787284A CN 108580637 A CN108580637 A CN 108580637A
- Authority
- CN
- China
- Prior art keywords
- side wall
- die holder
- plate
- upper die
- fixed sleeving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/06—Stamping using rigid devices or tools having relatively-movable die parts
-
- 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
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of 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
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
Abstract
The invention discloses a kind of decompressors with buffer protection function, including lower die holder and upper die holder, the lower die holder and upper die holder are in arranged in parallel, the upside side wall of the lower die holder is equipped with the cavity plate backing plate being laterally arranged, the upside side wall of the cavity plate backing plate is equipped with the die block being laterally arranged, and cavity plate is equipped in die block, the downside side wall of the upper die holder is equipped with the convex mould pad being laterally arranged, and the downside side wall of convex mould pad is equipped with the punch retainer being laterally arranged, fixed sleeving is equipped in the punch retainer, and feed inlet is equipped in the upside side wall of fixed sleeving, and cock is threaded in feed inlet, the upside side wall of the fixed sleeving and the side wall of punch retainer offset setting.In the present invention, which can effectively prevent the abrasion to movable ram, improve its service life；The positioning accuracy for ensureing punching press simultaneously, ensures the qualification rate of product.
Description
Technical field
The present invention relates to stamping equipment technical field more particularly to a kind of decompressors with buffer protection function.
Background technology
Punching press is that depended on pressure machine and mold apply external force to plank, band, tubing and proximate matter etc., is allowed to generate plastic deformation
Or separation, to the forming and machining method of the workpiece (stamping parts) of shape and size needed for acquisition.Punching press and forging belong to plasticity
It processes (or pressure processing), is collectively referred to as forging and pressing.The blank of punching press is mainly the steel plate and steel band of hot rolling and cold rolling.Global steel
In material, 60~70% be plank, and finished product is made by punching press in wherein most.Vehicle body, chassis, fuel tank, the radiator of automobile
Piece, the drum of boiler, the shell of container, motor, electric appliance iron core silicon-steel sheet etc. be all punch process.Instrument and meter, household
In the products such as electric appliance, bicycle, office machinery, household utensil, also there are a large amount of stamping parts, thus Sheet Metal Forming Technology is in mechanical processing
It is widely used.
For stamping equipment, in production and processing, can carry out stamping press not be shut down for a long time, due in stamping equipment
Either punch generally uses screw or bolt to be directly fastenedly connected to punch-pin, and in punching course, punch is in contact with plank
Moment can generate great stress suddenly, since punch and plank are in direct contact, without buffer unit and buffer distance, thus
The surface of punch is caused greatly to wear, while in continuous punching press, the connection of punch and screw or bolt can occur
It loosens, to influence subsequent normal ram operation, the quality of progress and product to production causes strong influence.
For this purpose, it is proposed that a kind of decompressor with buffer protection function solves the above problems.
Invention content
The purpose of the present invention is to solve problems of the prior art, and the one kind proposed is made with buffer protection
Decompressor.
To achieve the goals above, present invention employs following technical solutions：
A kind of decompressor with buffer protection function, including lower die holder and upper die holder, the lower die holder and upper die holder
In arranged in parallel, the upside side wall of the lower die holder is equipped with the cavity plate backing plate being laterally arranged, the cavity plate backing plate it is upper
Side side wall is equipped with the die block being laterally arranged, and cavity plate, the downside side wall of the upper die holder are equipped in die block
It is equipped with the convex mould pad being laterally arranged, and the downside side wall of convex mould pad is equipped with the punch retainer being laterally arranged, it is described
It is equipped with fixed sleeving in punch retainer, and is equipped with feed inlet in the upside side wall of fixed sleeving, and is threadedly coupled in feed inlet
There is a cock, the upside side wall of the fixed sleeving and the side wall of punch retainer offset setting, are inserted in the fixed sleeving
The movable ram being vertically arranged, the one end for being located at the movable ram in fixed sleeving are equipped with plunger push plate, the fixing sleeve
Cavity is formed between pipe and plunger push plate, and non-newtonian fluid is equipped in cavity, the activity punching being located on the outside of fixed sleeving
The outside side wall of head is equipped with annular shoulder block, and spring, and the both ends of spring point are arranged on the outside side wall of the movable ram
Do not offset with the side wall of punch retainer and annular shoulder block setting, and the die shank being vertically arranged is equipped in the upper die holder, described
Two guide sleeves are arranged on the downside side wall of upper die holder, the upside side wall of the lower die holder is equipped with leads with what guide sleeve matched
Column.
Preferably, run through between the cavity plate backing plate, die block and lower die holder and be equipped with multipair straight pin, and cavity plate
It is fastenedly connected by multiple lock-screws between backing plate, die block and lower die holder, the convex mould pad, punch retainer
And multipair straight pin is equipped between upper die holder, and be equipped with by multiple between convex mould pad, punch retainer and upper die holder
Lock-screw is fastenedly connected.
Preferably, the side wall that the upper die holder is in contact with die shank is equipped with rotation stop pin.
Preferably, annular groove there are two being set from top to bottom on the outside side wall of the plunger push plate, the annular groove
In be arranged with O-ring seal.
Preferably, the first-class spacer ring of the inner wall of the fixed sleeving is arranged with multiple correcting sliding slots, the movable ram
Around equipped with multiple correcting sliding blocks to match with correcting sliding slot on outside side wall.
Preferably, the movable ram is integrally formed with plunger push plate.
Compared with prior art, the beneficial effects of the invention are as follows：The decompressor is solid by being arranged in punch retainer
Determine casing, and be filled with non-newtonian fluid in fixed sleeving, so that movable ram when by moment stress, drives plunger
Push plate offsets with non-newtonian fluid moment, under non-newtonian fluid effect, to plunger push plate into row buffering, be rushed to movable
Head is buffered, and then reduces the abrasion to movable ram, improves its service life；
By being provided with multiple correcting sliding slots on the inner wall of fixed sleeving, and it is equipped in movable ram and matches with it
Correcting sliding block, to ensure that movable ram movement stability, and then ensure punching press positioning accuracy, ensure the conjunction of product
Lattice rate；
By the sheathed spring on the outside side wall of movable ram, so that in punching course, activity can be rushed
Head carries out preliminary buffering, meanwhile, when punching press is completed, movable ram can be resetted by the screen resilience of spring.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the decompressor with buffer protection function proposed by the present invention；
Fig. 2 is the structural schematic diagram at A in Fig. 1；
Fig. 3 is that a kind of cross-section structure of the fixed sleeving of the decompressor with buffer protection function proposed by the present invention shows
It is intended to.
In figure：1 lower die holder, 2 cavity plate backing plates, 3 die blocks, 4 cavity plates, 5 guide posts, 6 guide sleeves, 7 upper die holders, 8 locking screws
Nail, 9 die shanks, 10 rotation stop pins, 11 straight pins, 12 convex mould pads, 13 punch retainers, 14 movable rams, 15 annular shoulder blocks, 16 bullets
Spring, 17 correcting sliding blocks, 18 cocks, 19 fixed sleevings, 20 non-newtonian fluids, 21 annular grooves, 22O types sealing ring, 23 plungers push away
Plate, 24 correcting sliding slots.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
In the description of the present invention, it is to be understood that, term "upper", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation, with
Specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Referring to Fig.1-3, a kind of decompressor with buffer protection function, including lower die holder 1 and upper die holder 7, lower die holder 1
It is in arranged in parallel with upper die holder 7, the side wall that upper die holder 7 is in contact with die shank 9 is equipped with rotation stop pin 10, prevents die shank 9 from existing
It rotates in moving process, the upside side wall of lower die holder 1 is equipped with the cavity plate backing plate 2 being laterally arranged, the upside of cavity plate backing plate 2
Side wall is equipped with the die block 3 being laterally arranged, and cavity plate 4 is equipped in die block 3, on the downside side wall of upper die holder 7
Equipped with the convex mould pad 12 being laterally arranged, and the downside side wall of convex mould pad 12 is equipped with the punch retainer 13 being laterally arranged,
Run through between cavity plate backing plate 2, die block 3 and lower die holder 1 and be equipped with multipair straight pin 11, and cavity plate backing plate 2, cavity plate are fixed
It is fastenedly connected by multiple lock-screws 8 between plate 3 and lower die holder 1, convex mould pad 12, punch retainer 13 and upper die holder
It is equipped with multipair straight pin 11 between 7, and is equipped between convex mould pad 12, punch retainer 13 and upper die holder 7 and passes through multiple locks
Tight screw 8 is fastenedly connected, and is ensured the fixed precision of each connecting plate, fixed sleeving 19 is equipped in punch retainer 13, and fixed
It is equipped with feed inlet in the upside side wall of casing 19, and is threaded with cock 18 in feed inlet, the upside side wall of fixed sleeving 19
It offsets setting with the side wall of punch retainer 13, the movable ram 14 being vertically arranged is inserted in fixed sleeving 19, be located at and fix
One end of movable ram 14 in casing 19 is equipped with plunger push plate 23, and two are equipped with from top to bottom on the outside side wall of plunger push plate 23
A annular groove 21 is arranged with O-ring seal 22 in annular groove 21, ensures the sealing performance of plunger push plate 23, fixed sleeving
The 19 first-class spacer ring of inner wall is arranged with multiple correcting sliding slots 24, on the outside side wall of movable ram 14 around be equipped with it is multiple with lead
The correcting sliding block 17 that positive sliding slot 24 matches ensures the stability that movable ram 14 moves, living to ensure the accuracy of punching press
Dynamic punch 14 is integrally formed with plunger push plate 23, and molding easy to process forms cavity between fixed sleeving 19 and plunger push plate 23,
And non-newtonian fluid 20 is equipped in cavity, the outside side wall for being located at the movable ram 14 in 19 outside of fixed sleeving is equipped with annular keep off
Shoulder 15, is arranged with spring 16 on the outside side wall of movable ram 14, and the both ends of spring 16 respectively with punch retainer 13 and
The side wall of annular shoulder block 15 offsets setting, is equipped with the die shank 9 being vertically arranged in upper die holder 7, symmetrical on the downside side wall of upper die holder 7
If there are two guide sleeve 6, the upside side wall of lower die holder 1 is equipped with the guide post 5 to match with guide sleeve 6.
In the present invention, there should be the decompressor of buffer protection function when carrying out stamping press to plank, first by mould
Handle 9 is connected with the forcing press to match, is acted on by the pressure of forcing press so that die shank 9 moves down, by guide sleeve 6 with
Under the guiding role of guide post 5 so that upper die holder 7, convex mould pad 12, punch retainer 13 move down, and then movable ram 14
In the moment with web contact, spring 16 is shunk, and movable ram 14 moves up, to push plunger push plate 23 to move up,
Under unexpected stress, non-newtonian fluid 20 (non-newtonian fluid refers to the fluid for being unsatisfactory for newton stickiness experimental laws,
It is not the fluid of linear relationship between its shear stress and shear strain rate, has in very brief, moment impact force action
The lower characteristic for keeping original form, i.e. non-newtonian fluid is increased substantially in the moment of stress, viscosity, so as to moment
Impact force is into row buffering) viscosity moment improve, to which to plunger push plate 23, into row buffering, and then movable ram 14 is delayed
Punching, wears so as to eliminate moment stress caused by the side wall of movable ram 14, and then improves the use of movable ram 14
In the service life, in punching course, the sliding of multiple correcting sliding blocks 17 and correcting sliding slot 24 on 14 outside side wall of movable ram ensures
Movable ram 14 it is mobile stability, and then the accuracy of punching press positioning is ensure that, after the completion of punching press, when die sinking, in spring
Under 16 rebound effect, movable ram 14 drives plunger push plate 23 to move down until resetting.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of decompressor with buffer protection function, including lower die holder (1) and upper die holder (7), which is characterized in that described
Lower die holder (1) and upper die holder (7) are in arranged in parallel, and the upside side wall of the lower die holder (1) is recessed equipped with being laterally arranged
Die-cushion plate (2), the upside side wall of the cavity plate backing plate (2) are equipped with the die block (3) being laterally arranged, and die block
(3) cavity plate (4) is equipped in, the downside side wall of the upper die holder (7) is equipped with the convex mould pad (12) being laterally arranged, and punch-pin pad
The downside side wall of plate (12) is equipped with the punch retainer (13) being laterally arranged, and fixing sleeve is equipped in the punch retainer (13)
It manages (19), and is equipped with feed inlet in the upside side wall of fixed sleeving (19), and be threaded with cock (18) in feed inlet, it is described
The upside side wall of fixed sleeving (19) and the side wall of punch retainer (13) offset setting, are inserted in the fixed sleeving (19)
The movable ram (14) being vertically arranged, the one end for being located at the movable ram (14) in fixed sleeving (19) are equipped with plunger push plate
(23), cavity is formed between the fixed sleeving (19) and plunger push plate (23), and non-newtonian fluid (20), position are equipped in cavity
The outside side wall of the movable ram (14) on the outside of fixed sleeving (19) is equipped with annular shoulder block (15), the movable ram
(14) spring (16) is arranged on outside side wall, and the both ends of spring (16) are kept off with punch retainer (13) and annular respectively
The side wall of shoulder (15) offsets setting, and the die shank (9) being vertically arranged, the downside of the upper die holder (7) are equipped in the upper die holder (7)
Two guide sleeves (6) are arranged on side wall, the upside side wall of the lower die holder (1) is equipped with the guide post to match with guide sleeve (6)
(5)。
2. a kind of decompressor with buffer protection function according to claim 1, which is characterized in that the die supporter
Run through between plate (2), die block (3) and lower die holder (1) and be equipped with multipair straight pin (11), and cavity plate backing plate (2), cavity plate
It is fastenedly connected by multiple lock-screws (8) between fixed plate (3) and lower die holder (1), the convex mould pad (12), punch-pin are solid
Between fixed board (13) and upper die holder (7) be equipped with multipair straight pin (11), and convex mould pad (12), punch retainer (13) and
It is equipped between upper die holder (7) and is fastenedly connected by multiple lock-screws (8).
3. a kind of decompressor with buffer protection function according to claim 1, which is characterized in that the upper die holder
(7) side wall being in contact with die shank (9) is equipped with rotation stop pin (10).
4. a kind of decompressor with buffer protection function according to claim 1, which is characterized in that the plunger pushes away
It is set on the outside side wall of plate (23) there are two annular groove (21), is arranged in the annular groove (21) O-shaped close from top to bottom
Seal (22).
5. a kind of decompressor with buffer protection function according to claim 1, which is characterized in that the fixing sleeve
The first-class spacer ring of inner wall of pipe (19) is arranged with multiple correcting sliding slots (24), is surround on the outside side wall of the movable ram (14)
Equipped with multiple correcting sliding blocks (17) to match with correcting sliding slot (24).
6. a kind of decompressor with buffer protection function according to claim 1, which is characterized in that the activity punching
Head (14) is integrally formed with plunger push plate (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787284.1A CN108580637B (en) | 2018-07-18 | 2018-07-18 | A kind of stamping device with buffer protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810787284.1A CN108580637B (en) | 2018-07-18 | 2018-07-18 | A kind of stamping device with buffer protection function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108580637A true CN108580637A (en) | 2018-09-28 |
| CN108580637B CN108580637B (en) | 2019-09-10 |
Family
ID=63617876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810787284.1A Expired - Fee Related CN108580637B (en) | 2018-07-18 | 2018-07-18 | A kind of stamping device with buffer protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108580637B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434086A (en) * | 2018-10-16 | 2019-03-08 | 金华市宝琳工贸有限公司 | A kind of mould positioning mechanism of single mode casting machine |
| CN109719201A (en) * | 2019-02-26 | 2019-05-07 | 滁州市超顺装备科技有限公司 | A kind of stamping die that formed punch is convenient for changing |
| CN111421091A (en) * | 2020-04-01 | 2020-07-17 | 盐城摩因宝新材料有限公司 | Integrally-formed forging device and working method thereof |
| CN111421092A (en) * | 2020-04-01 | 2020-07-17 | 盐城摩因宝新材料有限公司 | Forging die and working method thereof |
| CN111421038A (en) * | 2020-04-01 | 2020-07-17 | 盐城摩因宝新材料有限公司 | Stamping module and working method thereof |
| CN111456579A (en) * | 2020-04-10 | 2020-07-28 | 湖州天启家居科技有限公司 | Anti-collision noise reduction device for whole-wood home based on non-Newtonian fluid |
| CN112397942A (en) * | 2020-11-19 | 2021-02-23 | 汪小军 | A buffering prevents structure of tearing apart for AI intelligent storage and connector |
| CN114309289A (en) * | 2021-12-27 | 2022-04-12 | 靖江市联友模具制造有限公司 | High-efficient location direction auxiliary assembly of accurate mould operation |
| CN116944329A (en) * | 2023-09-21 | 2023-10-27 | 太原理工大学 | Ultra-high-speed forming device for plate processing based on impact hydraulic principle |
| CN116967334A (en) * | 2023-09-22 | 2023-10-31 | 华达汽车科技股份有限公司 | Stamping die of inner plate of automobile fuel tank cap |
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| GB2260724B (en) * | 1991-10-21 | 1994-11-23 | Teledyne Ind | Apparatus and method for cushioning movement of a member in a press |
| CN105081066A (en) * | 2015-08-12 | 2015-11-25 | 西北轴承股份有限公司 | Double-positioning punching mould for rolling bearing leading-in cantilever |
| CN106807842A (en) * | 2015-12-01 | 2017-06-09 | 会田工程技术有限公司 | The slip buffer unit of forcing press |
| CN107303594A (en) * | 2016-04-22 | 2017-10-31 | 会田工程技术有限公司 | The pad adjusting apparatus and method of die cushion |
| CN206868908U (en) * | 2017-04-14 | 2018-01-12 | 深圳市鸿科智能科技有限公司 | A kind of perforating press of good buffer effect |
| CN207255050U (en) * | 2017-09-15 | 2018-04-20 | 佛山市赛冠模具有限公司 | A kind of buffer-type attachment device between mould and staking punch |
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- 2018-07-18 CN CN201810787284.1A patent/CN108580637B/en not_active Expired - Fee Related
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| GB2260724B (en) * | 1991-10-21 | 1994-11-23 | Teledyne Ind | Apparatus and method for cushioning movement of a member in a press |
| CN105081066A (en) * | 2015-08-12 | 2015-11-25 | 西北轴承股份有限公司 | Double-positioning punching mould for rolling bearing leading-in cantilever |
| CN106807842A (en) * | 2015-12-01 | 2017-06-09 | 会田工程技术有限公司 | The slip buffer unit of forcing press |
| CN107303594A (en) * | 2016-04-22 | 2017-10-31 | 会田工程技术有限公司 | The pad adjusting apparatus and method of die cushion |
| CN206868908U (en) * | 2017-04-14 | 2018-01-12 | 深圳市鸿科智能科技有限公司 | A kind of perforating press of good buffer effect |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109434086A (en) * | 2018-10-16 | 2019-03-08 | 金华市宝琳工贸有限公司 | A kind of mould positioning mechanism of single mode casting machine |
| CN109719201A (en) * | 2019-02-26 | 2019-05-07 | 滁州市超顺装备科技有限公司 | A kind of stamping die that formed punch is convenient for changing |
| CN111421091B (en) * | 2020-04-01 | 2021-09-03 | 嘉兴晨人一信仪表有限公司 | Integrally-formed forging device and working method thereof |
| CN111421091A (en) * | 2020-04-01 | 2020-07-17 | 盐城摩因宝新材料有限公司 | Integrally-formed forging device and working method thereof |
| CN111421092A (en) * | 2020-04-01 | 2020-07-17 | 盐城摩因宝新材料有限公司 | Forging die and working method thereof |
| CN111421038A (en) * | 2020-04-01 | 2020-07-17 | 盐城摩因宝新材料有限公司 | Stamping module and working method thereof |
| CN111421092B (en) * | 2020-04-01 | 2021-08-10 | 浙江越达精密锻造有限公司 | Forging die and working method thereof |
| CN111456579A (en) * | 2020-04-10 | 2020-07-28 | 湖州天启家居科技有限公司 | Anti-collision noise reduction device for whole-wood home based on non-Newtonian fluid |
| CN112397942A (en) * | 2020-11-19 | 2021-02-23 | 汪小军 | A buffering prevents structure of tearing apart for AI intelligent storage and connector |
| CN114309289A (en) * | 2021-12-27 | 2022-04-12 | 靖江市联友模具制造有限公司 | High-efficient location direction auxiliary assembly of accurate mould operation |
| CN116944329A (en) * | 2023-09-21 | 2023-10-27 | 太原理工大学 | Ultra-high-speed forming device for plate processing based on impact hydraulic principle |
| CN116944329B (en) * | 2023-09-21 | 2023-12-12 | 太原理工大学 | Ultra-high-speed forming device for plate processing based on impact hydraulic principle |
| CN116967334A (en) * | 2023-09-22 | 2023-10-31 | 华达汽车科技股份有限公司 | Stamping die of inner plate of automobile fuel tank cap |
| CN116967334B (en) * | 2023-09-22 | 2023-12-15 | 华达汽车科技股份有限公司 | Stamping die of inner plate of automobile fuel tank cap |
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| Publication number | Publication date |
|---|---|
| CN108580637B (en) | 2019-09-10 |
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