CN107282742B - Method for automobile parts punching press - Google Patents
Method for automobile parts punching press Download PDFInfo
- Publication number
- CN107282742B CN107282742B CN201710703144.7A CN201710703144A CN107282742B CN 107282742 B CN107282742 B CN 107282742B CN 201710703144 A CN201710703144 A CN 201710703144A CN 107282742 B CN107282742 B CN 107282742B
- Authority
- CN
- China
- Prior art keywords
- steel plate
- automobile parts
- formed punch
- punching press
- punching
- 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.)
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- 238000004080 punching Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 74
- 239000010959 steel Substances 0.000 claims abstract description 74
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 230000000694 effects Effects 0.000 claims description 11
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 9
- 239000002994 raw material Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/06—Making more than one part out of the same blank; Scrapless working
-
- 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
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/04—Centering the work; Positioning the tools
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/12—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by chains or belts
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/20—Storage arrangements; Piling or unpiling
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
- B21D45/04—Ejecting devices interrelated with motion of tool
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The present invention relates to accessory stamping areas, and in particular to for the method for automobile parts punching press, includes the following steps: step 1: preparing automobile parts processing unit (plant)；Step 2: being located at steel plate one end below formed punch；Step 3: starting press machine；Step 4: the automobile parts after punching press are fallen in supporting block；Step 5: automobile parts are reset in the punching hole of steel plate；Punching hole drives automobile parts to fall into collecting box in steel plate moving process；Step 6: the next position needed to stamp of steel plate is located at below formed punch, is again started up motor, circuits sequentially.When using the technical program, promotes steel plate automatic equidistant from movement, workpiece is automatically reset to steel plate punched hole by pressure spring and supporting block after completing punching press, cooperate again with transmission net band, mobile bar and formed punch, the automatic collection for realizing workpiece, reduces working strength, improves safety.
Description
Technical field
The present invention relates to accessories manufacturing fields, and in particular to the method for automobile parts punching press.
Background technique
Automobile parts are generally punch forming.Conventional ones are put into single steel plate on lower mold, and upper mold is to steel plate
Steel plate is removed after carrying out punching press, then artificially collects the good automobile parts of punching press.But this punching press program is cumbersome, efficiency compared with
It is low, and automobile parts are located at below upper mold, and artificial pickup is relatively hazardous.It is typically now manually to push to improve efficiency
Steel plate is mobile, i.e., artificial punching press again after pushing the mobile a distance of steel plate forward after every punching press is primary.Although this mode mentions
High ram efficiency, but increase pickup difficulty；The artificial distance that cannot be guaranteed that steel plate moves every time is the same simultaneously, if mobile
Distance is too small, and the automobile parts after punching press are imperfect, will increase rejection rate；If moving distance is too big, steel cannot be utilized carefully
Plate causes waste of raw materials.
Summary of the invention
The purpose of the present invention is to provide automatically move steel plate in a kind of punching course and receive automatically to automobile parts
The method of collection.
In order to achieve the above objectives, the technical solution of the present invention is to provide the method for automobile parts punching press, including it is as follows
Step:
Step 1: getting out automobile parts processing unit (plant), including rack, press machine, pedestal and lower mold；The press machine
It is fixed in rack, press machine includes formed punch；The lower mold is fixed on pedestal, and lower mold is equipped with groove and is located at formed punch
Lower section；It is characterized by also including transmission net band, mobile bar, collecting box, supporting block and Negative pressure machines；The Negative pressure machine and support
Block is arranged in the groove, and supporting block lower end surface is fixed with pressure spring, and bottom portion of groove is fixed in pressure spring free end, naturally flexible in pressure spring
Under state, supporting block upper surface is flushed with lower mould upper surface；The transmission net band be horizontally placed in rack and with lower mold
Upper surface flushes；Stroke hole is equipped in the middle part of the mobile bar, mobile bar and rack are articulated with to be formed at hole；Mobile bar one end and punching
Head is hinged, and the mobile bar other end is fixed with crotch；The collecting box is set on pedestal and is located at below steel plate；
Step 2: steel plate being placed on transmission net band, is located at steel plate one end below formed punch；
Step 3: starting press machine, formed punch move downward, and drive mobile bar to be fixed with crotch one end and raise up, while starting pressure
Negative pressure is generated in the confined space that power machine, groove and steel plate are formed, and steel plate is tightly adsorbed on lower mold；
Step 4: after formed punch is contacted with steel plate, formed punch cooperates with lower mold groove stamps out automobile parts, in punching course
Supporting block moves down under formed punch effect, and the automobile parts after punching press are fallen in supporting block；After the completion of punching press, left on steel plate
Punching hole, steel plate remaining scrap at punching hole enters in groove under the suction function that Negative pressure machine generates when punching press；
Step 5: simultaneously closing off press machine and Negative pressure machine, formed punch moves upwards under the action of press machine, and supporting block is being pressed
It is also moved upwards under the action of spring, is reset to automobile parts in the punching hole of steel plate；Formed punch continues to rise, and mobile bar is fixed with
Crotch one end moves downward, and when crotch tangles transmission net band, mobile bar drives transmission net band mobile, so that steel plate be driven to move
It is dynamic；Punching hole drives automobile parts mobile in steel plate moving process, after automobile parts completely disengage lower mould support, falls into receipts
In header；
Step 6: after press machine is shut down, the next position needed to stamp of steel plate is located at below formed punch, is again started up motor,
It circuits sequentially.
The technical principle of this programme is: steel plate being placed on transmission net band, is located at steel plate one end below formed punch.Starting
Negative pressure machine, formed punch move downward, while starting press machine, negative pressure are generated in the confined space that groove and steel plate are formed, by steel plate
It is tightly adsorbed on lower mold；Due to hinged with rack in the middle part of mobile bar, mobile bar one end and formed punch are hinged, so formed punch is downward
Movement drives mobile bar to be fixed with crotch one end and raises up.After formed punch continues to move downward and contact with steel plate, formed punch and lower die
Tool groove cooperation stamps out workpiece, leaves punching hole on steel plate；When punching press steel plate at punching hole remaining scrap in Negative pressure machine
Enter in groove under the suction function of generation.Supporting block moves down under formed punch effect in punching course, the workpiece after punching press
It falls in supporting block.After the completion of punching press, press machine and Negative pressure machine are simultaneously closed off, formed punch moves upwards under the action of press machine,
Supporting block also moves upwards under the action of pressure spring, and the workpiece after making punching press is reset in the punching hole of steel plate.Continue in formed punch
During rising, mobile bar is fixed with crotch one end and moves downward, and when crotch tangles transmission net band, mobile bar drives transmission
Mesh belt is mobile, to drive steel plate mobile；Punching hole on steel plate moving process light plate drives workpiece mobile, when workpiece is complete
After being detached from lower mould support, workpiece is fallen into collecting box.After press machine stops, next position needed to stamp is located on steel plate
Below formed punch.
This programme has the technical effect that being used cooperatively by transmission net band, mobile bar, formed punch, lower mold and groove, passes
It send mesh belt to realize and roll by formed punch and mobile bar cooperation without other external force, promotes steel plate automatic equidistant from shifting
It is dynamic, to complete punching press, raw material have been saved while drawing velocity is fast；Simultaneously by matching with Negative pressure machine, pressure spring and supporting block
Close use, improve the stability during steel plate punched, improve the quality of workpiece after punching press, also to steel plate punched hole at
Scrap is collected, it is ensured that workpiece can be smoothly reset in punching hole；Again by matching with transmission net band, mobile bar and formed punch
It closes, using the automatic collection of the mobile realization workpiece of steel plate itself, reduces working strength, improve safety.
Further, transmission net band described in step 1 is equipped with directive wheel.Having the technical effect that for this programme passes through setting
Directive wheel, it is ensured that steel plate will not shift in the process of moving.
Further, buffer board is tiltedly installed in transmission net band described in step 1 and the rack between collecting box.We
When the automobile parts for having the technical effect that punching press is completed of case are fallen out of punching hole, fall on buffer board first, then from buffering
It slides on plate into collecting box, compared with directly falling in collecting box, reduces the spoilage of automobile parts.
Further, rubber sleeve is arranged on crotch described in step 1.This programme has the technical effect that transmission net band moves
Crotch is in contact with it during dynamic, can reduce mutual wear rate by being arranged rubber sleeve on crotch；Rubber sleeve can simultaneously
To increase the frictional force of crotch Yu transmission net band, taken off from transmission net band during preventing crotch from driving transmission net band mobile
It falls.
Further, support block size described in step 1 is less than groove size.This programme has the technical effect that supporting block
Size is less than the friction that groove size can reduce supporting block and groove inner wall, guarantees that punching press aft support block can smoothly go up bullet,
Automobile parts after punching press are reset in punching hole.
When by adopting the above technical scheme, transmission net band is made without other external force by formed punch and mobile bar cooperation
It is rolled with realizing, promotes steel plate automatic equidistant from movement, while improving the stability during steel plate punched, improve punching press
The quality of workpiece afterwards also collects the scrap at steel plate punched hole, it is ensured that and workpiece can be smoothly reset in punching hole,
The automatic collection for realizing workpiece, reduces working strength, improves safety.
Detailed description of the invention
Fig. 1 is the method mould therefor main view that the present invention is used for automobile parts punching press；
Fig. 2 is the method mould therefor top view that the present invention is used for automobile parts punching press.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Appended drawing reference in Figure of description includes: pedestal 1, lower mold 2, collecting box 3, transmission net band 4, steel plate 5, movement
Bar 6, press machine 7, directive wheel 8, groove 9, pressure spring 10, supporting block 11, buffer board 12, formed punch 13, stroke hole 14, crotch 15.
For the method for automobile parts punching press, using stamping die as shown in Figure 1 and Figure 2, from top to bottom include pedestal 1,
Lower mold 2,3, two transmission net bands 4 of collecting box, 5, two mobile bars 6 of steel plate, press machine 7 and rack.Lower mold 2 and collecting box
3 are fixed on pedestal 1, and lower mold 2 is located at 3 left side of collecting box.Two transmission net bands 4 are parallel and are horizontally placed in rack, steel
Plate 5 is placed on two transmission net bands 4, and the transmission net band 4 of 5 two sides of steel plate is equipped with directive wheel 8.Lower mold 2 and collecting box 3 are located at
The lower section of steel plate 5, is provided with groove 9 on lower mold 2, and the shape of groove 9, size and formed punch 13 are identical；9 bottom of groove is fixed with one
Pressure spring 10,10 upper end of pressure spring are fixedly connected with a supporting block 11, and the length and width of supporting block 11 is less than the length and width of groove 9
Degree, 11 upper surface of supporting block flush with lower 2 upper surface of mold, also flush with transmission net band 4, and 9 bottom of groove is further fixed on negative pressure
Machine 16.In addition lower inclination is fixed with buffer board 12 to the right in the rack between transmission net band 4 and collecting box 3.Press machine 7 is fixed on
In rack, press machine 7 includes formed punch 13, and formed punch 13 is located at right above groove 9.Two 6 middle parts of mobile bar are provided with stroke hole 14,
Pin passes through stroke hole 14 and mobile bar 6 is positioned in rack.The upper end of two mobile bars 6 is hinged with formed punch 13 respectively, and two
The lower end of mobile bar 6 is respectively fixed with a crotch 15, covers rubber sleeve on crotch 15.
Specific steps for automobile parts processing are as follows:
Step 1: getting out above-mentioned automobile parts processing unit (plant)；
Step 2: steel plate 5 being placed on transmission net band 4,5 right end of steel plate is made to be located at 13 lower section of formed punch；
Step 3: starting press machine 7, formed punch 13 are moved downward, so that 6 lower end of mobile bar be driven to raise up clockwise, are opened simultaneously
Negative pressure is generated in the confined space that dynamic Negative pressure machine 16, groove 9 and steel plate 5 are formed, steel plate 5 is tightly adsorbed on lower mold 2；；
Step 4: after formed punch 13 is contacted with steel plate 5, formed punch 13 and the cooperation of lower 2 groove 9 of mold stamp out automobile parts, punching press
Supporting block 11 moves down under the effect of formed punch 13 in the process, and the automobile parts after punching press are fallen in supporting block 11；Punching press is completed
Afterwards, punching hole is left on steel plate 5, the suction function that remaining scrap is generated in Negative pressure machine 16 at punching hole of steel plate 5 when punching press
It is lower to enter in groove 9；
Step 5: simultaneously closing off press machine 7 and Negative pressure machine 16, formed punch 13 moves upwards under the action of press machine 7, support
Block 11 also moves upwards under the action of pressure spring 10, is reset to automobile parts in the punching hole of steel plate 5；On formed punch 13 continues
It rises, 6 lower end anti-clockwise downward movement of mobile bar, when crotch 15 tangles transmission net band 4, mobile bar 6 drives transmission net band 4 to the right
It is mobile, so that steel plate 5 be driven to move right；Punching hole drives automobile parts to move right in 5 moving process of steel plate, when automobile is matched
After part completely disengages the lower support of mold 2, fall into collecting box 3；
Step 6: after press machine 7 is shut down, the next position needed to stamp of steel plate 5 is located at immediately below formed punch 13；It opens again
Dynamic motor carries out punching press to steel plate 5, circuits sequentially.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those skilled in the art,
Without departing from the inventive concept of the premise, several modifications and improvements can also be made, these also should be considered as guarantor of the invention
Range is protected, these all will not influence the effect and patent practicability that the present invention is implemented.The present invention omits the technology department of description
Dividing is well-known technique.
Claims (5)
1. the method for being used for automobile parts punching press, which comprises the steps of:
Step 1: getting out automobile parts processing unit (plant), including rack, press machine, pedestal and lower mold；The press machine is fixed
In in rack, press machine includes formed punch；The lower mold is fixed on pedestal, and lower mold is equipped with groove and is located under formed punch
Side；It is characterized by also including transmission net band, mobile bar, collecting box, supporting block and Negative pressure machines；The Negative pressure machine and supporting block
It is arranged in the groove, supporting block lower end surface is fixed with pressure spring, and bottom portion of groove is fixed in pressure spring free end, in pressure spring nature scale shape
Under state, supporting block upper surface is flushed with lower mould upper surface；The transmission net band be horizontally placed in rack and on lower mold
Surface flushes；Stroke hole is equipped in the middle part of the mobile bar, mobile bar and rack are articulated at stroke hole；Mobile bar one end and formed punch
Hingedly, the mobile bar other end is fixed with crotch；The collecting box is set on pedestal and is located at below steel plate；
Step 2: steel plate being placed on transmission net band, is located at steel plate one end below formed punch；
Step 3: starting press machine, formed punch move downward, and drive mobile bar to be fixed with crotch one end and raise up, while starting negative pressure
Negative pressure is generated in the confined space that machine, groove and steel plate are formed, and steel plate is tightly adsorbed on lower mold；
Step 4: after formed punch is contacted with steel plate, formed punch and the cooperation of lower mold groove stamp out automobile parts, support in punching course
Block moves down under formed punch effect, and the automobile parts after punching press are fallen in supporting block；After the completion of punching press, punching press is left on steel plate
Hole, steel plate remaining scrap at punching hole enters in groove under the suction function that Negative pressure machine generates when punching press；
Step 5: simultaneously closing off press machine and Negative pressure machine, formed punch moves upwards under the action of press machine, and supporting block is in pressure spring
It is also moved upwards under effect, is reset to automobile parts in the punching hole of steel plate；Formed punch continues to rise, and mobile bar is fixed with crotch
One end moves downward, and when crotch tangles transmission net band, it is mobile that mobile bar drives transmission net band, to drive steel plate mobile；Steel
Punching hole drives automobile parts mobile in plate moving process, after automobile parts completely disengage lower mould support, falls into collecting box
It is interior；
Step 6: after press machine is shut down, the next position needed to stamp of steel plate is located at below formed punch, is again started up motor, successively
Circulation.
2. the method according to claim 1 for automobile parts punching press, it is characterised in that: transmission net described in step 1
It takes and is equipped with directive wheel.
3. the method according to claim 2 for automobile parts punching press, it is characterised in that: transmission net described in step 1
Buffer board is tiltedly installed in rack between band and collecting box.
4. the method according to claim 3 for automobile parts punching press, it is characterised in that: on crotch described in step 1
It is arranged rubber sleeve.
5. the method according to claim 4 for automobile parts punching press, it is characterised in that: supporting block described in step 1
Size is less than groove size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710703144.7A CN107282742B (en) | 2017-08-16 | 2017-08-16 | Method for automobile parts punching press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710703144.7A CN107282742B (en) | 2017-08-16 | 2017-08-16 | Method for automobile parts punching press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107282742A CN107282742A (en) | 2017-10-24 |
| CN107282742B true CN107282742B (en) | 2018-12-21 |
Family
ID=60106917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710703144.7A Active CN107282742B (en) | 2017-08-16 | 2017-08-16 | Method for automobile parts punching press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107282742B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918809A (en) * | 2019-11-19 | 2020-03-27 | 芜湖创挚汽车科技有限公司 | A transmission device for automobile parts punching press |
| CN111790803A (en) * | 2020-07-01 | 2020-10-20 | 陈必友 | Punching machine for preventing punch from bonding during aluminum sheet punching |
| CN112247062B (en) * | 2020-09-30 | 2022-12-02 | 北京理工大学深圳汽车研究院 | Rivet feeding device for electromagnetic riveter |
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| CN203578496U (en) * | 2013-12-13 | 2014-05-07 | 宁波东源音响器材有限公司 | Equipment for manufacturing shell cover of high pitch loudspeaker |
| CN104056991A (en) * | 2014-05-27 | 2014-09-24 | 安徽红桥金属制造有限公司 | Punch press |
| CN104056992A (en) * | 2014-05-27 | 2014-09-24 | 安徽红桥金属制造有限公司 | Stamping press convenient for demolding |
| CN104759515A (en) * | 2015-04-13 | 2015-07-08 | 昆山市太祥科技电子有限公司 | Novel punching production line |
| CN205217712U (en) * | 2015-11-03 | 2016-05-11 | 重庆锐佳机械有限公司 | Clutch speed reducer steel sheet punching machine |
| JP6343730B1 (en) * | 2018-02-22 | 2018-06-13 | 株式会社江商 | Decorative button |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6343730A (en) * | 1986-08-09 | 1988-02-24 | Murata Mach Ltd | Punching method and punching device |
-
2017
- 2017-08-16 CN CN201710703144.7A patent/CN107282742B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203578496U (en) * | 2013-12-13 | 2014-05-07 | 宁波东源音响器材有限公司 | Equipment for manufacturing shell cover of high pitch loudspeaker |
| CN104056991A (en) * | 2014-05-27 | 2014-09-24 | 安徽红桥金属制造有限公司 | Punch press |
| CN104056992A (en) * | 2014-05-27 | 2014-09-24 | 安徽红桥金属制造有限公司 | Stamping press convenient for demolding |
| CN104759515A (en) * | 2015-04-13 | 2015-07-08 | 昆山市太祥科技电子有限公司 | Novel punching production line |
| CN205217712U (en) * | 2015-11-03 | 2016-05-11 | 重庆锐佳机械有限公司 | Clutch speed reducer steel sheet punching machine |
| JP6343730B1 (en) * | 2018-02-22 | 2018-06-13 | 株式会社江商 | Decorative button |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107282742A (en) | 2017-10-24 |
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Effective date of registration: 20201221 Address after: 224011, Fenghuang Town, Yanlong District, Jiangsu Province Patentee after: YANCHENG TONGHUAN ELECTROMECHANICAL TECHNOLOGY Co.,Ltd. Address before: 402761 group 7, Laifeng village, Qinggang street, Bishan County, Chongqing Patentee before: CHONGQING YOUBO MACHINERY MANUFACTURING Co.,Ltd. |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20171024 Assignee: YANCHENG TONGJI AUTO PARTS Co.,Ltd. Assignor: YANCHENG TONGHUAN ELECTROMECHANICAL TECHNOLOGY Co.,Ltd. Contract record no.: X2023980048471 Denomination of invention: Methods for stamping automotive parts Granted publication date: 20181221 License type: Common License Record date: 20231128 |
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