CN102049446B - Variable-procedure stamping die for positive and negative stretching of parts - Google Patents
Variable-procedure stamping die for positive and negative stretching of parts Download PDFInfo
- Publication number
- CN102049446B CN102049446B CN 201010548532 CN201010548532A CN102049446B CN 102049446 B CN102049446 B CN 102049446B CN 201010548532 CN201010548532 CN 201010548532 CN 201010548532 A CN201010548532 A CN 201010548532A CN 102049446 B CN102049446 B CN 102049446B
- Authority
- CN
- China
- Prior art keywords
- die
- draw
- positive
- drawing product
- negative drawing
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A variable-procedure stamping die for the positive and negative stretching of parts belongs to the technical field of forming and dies in mechanical engineering, and consists of a hydraulic system and a die part. The hydraulic system comprises an adjustable one-way throttle valve, a three-position four-way directional valve and a piston rod; and the die part comprises an inner/outer stretching punch-die fixed on a lower die holder, as well as an outer stretching female die and an inner stretching male die which are fixed on an upper die holder, wherein the movement of the outer stretching female die is controlled by the piston rod; the moving direction and speed of the piston rod are controlled by the three-position four-way directional valve and the adjustable one-way throttle valve; sheets can be stretched into different depths to achieve different procedures of stamping through adjustment of initial relative positions of both the outer stretching female die and the inner stretchingmale die in the height direction and the replacement of a limited block; and the precedence of inner stretching and outer stretching of the sheets can be changed through controlling the up-and-down movement direction of the outer stretching female die. The variable-procedure stamping die provided by the invention overcomes the shortcomings in the prior art that a plurality of stamping dies are required to complete the stamping, has a lower cost and improves the economic benefit.
Description
Technical field
The present invention relates to a kind of mechanical and hydraulic linkage for positive and negative drawing product order composite punching die of exchanging work, belong to shaping and technical field of mold in the mechanical engineering.
Background technology
Sheet metal stretching is as a kind of important sheet-metal press working processing method, its stretching quality depends primarily on correctness and the reasonability of drawing process and mould, in various sheet-metal press working processing methods, the shared status that stretches is most important, the shaping difficulty is also maximum, but there is not yet up to now the integrated of drawing process and mould structure; The designer is when determining various drawing process scheme at present, still generally utilize experience, constantly revise process program and mould structure by debugging mould repeatedly, its obvious shortcoming is exactly that forming quality is poor, number of molds is many, processing and debugging cycle are very long, and production cost is high, can not adapt to day by day fierce market competition environment.
In Sheet Metal Stamping Process, only follow the basic law of sheet metal forming, just can produce high-quality stamped part, inside and outside stretching and punching processing for light sheet, owing to being subject to the restriction of the material deformation limit, produce with experiment in need to adopt different forming process contents and change in the imaging order of out-draw.
Box part stretch forming is one of typical manufacturing process.The present invention relates to a kind of order composite punching die of exchanging work of mechanical and hydraulic linkage, the variation that the in-process of both can having realized being shaped holds, also can realize the same processes content but the variation of differing formed order, optimize strain paths, reduce number of molds, easy to operate, save installment and debugging man-hour, guarantee element precision, raise labour productivity, thereby increase economic efficiency.
Summary of the invention
The object of the present invention is to provide can be at a kind of mechanical and hydraulic linkage that single-lift hydraulic press uses order composite die of exchanging work, it can realize the be shaped variation of in-process appearance and the variation of imaging order, optimize strain paths, improve the forming property of forming speed sensitiveness plate, process the product of different depth demand, solve the deficiency that originally will just can finish with several secondary diels this punching press, easy to operate, realize automated production, save installment and debugging man-hour, save the mould manufacturing expense, guarantee element precision, raise labour productivity.
The present invention designs a kind of mechanical and hydraulic linkage for positive and negative drawing product order composite punching die of exchanging work.Take typical box part as example, simple box part as shown in Figure 2, flange face is the plane, the bottom is made of the anti-bulge of certain depth; Length and the width dimensions of simple box part are respectively A and B, and height dimension is H; Inner counter bulge length and width dimensions are respectively a and b, and height dimension is h.
Described a kind of order diel of exchanging work for the positive and negative drawing product, it is characterized in that: be comprised of hydraulic system and mould part, described hydraulic system comprises adjustable one-way throttle valve, three position four-way directional control valve and piston rod; Described mould part comprises the interior out-draw punch-die that is fixed on the die shoe, is fixed on out-draw die and in-draw punch on the upper bolster, the motion of out-draw die is the piston rod control by hydraulic system, and the direction of motion of piston rod and speed are respectively by three position four-way directional control valve and the control of adjustable one-way throttle valve, by regulating out-draw die and the initial relative position of in-draw punch on short transverse, and be positioned at the different depth that the limited block of differing heights on the die shoe is realized sheet metal stretching by replacing, realize the stamping of different operation contents; The direction that moves up and down by control out-draw die changes out-draw precedence in the plate.
Described a kind of order diel of exchanging work for the positive and negative drawing product, it is characterized in that: described positive and negative drawing product is box part.
Described a kind of order diel of exchanging work for the positive and negative drawing product, it is characterized in that: the die depth in the interior out-draw punch-die equals the height h of the inner counter bulge of positive and negative drawing product.
Described a kind of order diel of exchanging work for the positive and negative drawing product, it is characterized in that: the degree of depth of described plate out-draw equals the height H of positive and negative drawing product.
Described a kind of order diel of exchanging work for the positive and negative drawing product, it is characterized in that: the length A of positive and negative drawing product and width B equal respectively length and the width of interior out-draw punch-die.
Described a kind of order diel of exchanging work for the positive and negative drawing product, it is characterized in that: the length a of the inner counter bulge of positive and negative drawing product and width b equal respectively length and the width of in-draw punch.
Described a kind of order diel of exchanging work for the positive and negative drawing product, it is characterized in that: the direction that moves up and down by control out-draw die changes that out-draw precedence refers in the plate: the oil circuit in the hydraulic system links to each other with hydraulic cylinder in the upper bolster, the A mouth of oil circuit connects the cavity of resorption of hydraulic cylinder, the B mouth of oil circuit connects the epicoele of hydraulic cylinder, consist of the loop, change the oil-feed direction by three position four-way directional control valve, the direction that moves up and down of control out-draw die.
Described a kind of order diel of exchanging work for the positive and negative drawing product, it is characterized in that: when the left position of three position four-way directional control valve oil is connected, oil enters the cavity of resorption of hydraulic cylinder from the A mouth, the moving upward of control out-draw die, and oil is from the epicoele of hydraulic cylinder and flow back to the fuel tank of hydraulic system through the B mouth; When the right position of three position four-way directional control valve oil was connected, oil entered the epicoele of hydraulic cylinder from the B mouth, the moving downward of control out-draw die, and oil is from the cavity of resorption of hydraulic cylinder and flow back to the fuel tank of hydraulic system through the A mouth.
Described a kind of order diel of exchanging work for the positive and negative drawing product is characterized in that: when out-draw die and in-draw punch height flush, during the downward punching press of upper bolster, realize external shape and simultaneously stretch forming of inner counter bulge.
Described a kind of order diel of exchanging work for the positive and negative drawing product is characterized in that: when the out-draw die is lower than in-draw punch height, during the downward punching press of upper bolster, realize first external shape being stretched, then bulge stretches to inner counter.
Described a kind of order diel of exchanging work for the positive and negative drawing product is characterized in that: when the out-draw die is higher than in-draw punch height, during the downward punching press of upper bolster, realize that bulge stretches to inner counter first, then stretches to external shape.
Described a kind of order diel of exchanging work for the positive and negative drawing product is characterized in that: regulate the draw speed of out-draw die by adjustable one-way throttle valve, improve the forming property of forming speed sensitiveness plate.
The invention has the advantages that: 1) adopt the mechanical and hydraulic linkage device, initial position by piston in the control hydraulic system is regulated out-draw die and the initial relative position of in-draw punch on short transverse, thereby can realize the stamping of different operation contents; 2) by changing the limited block of differing heights, can change the operation content, produce the product of different depth demand; 3) regulate the different constantly out-draw dies direction of motion up and down by three position four-way directional control valve, thereby can realize the same processes content but different inside and outside imaging orders stamping; 4) regulate the draw speed of out-draw die by adjustable one-way throttle valve, improve the forming property of forming speed sensitiveness plate; 5) this composite die is realized automatically control by stroke relay, reversal valve, overflow valve, choke valve, limited post etc., is easy to operate, and saves installment and debugging man-hour, guarantees the precision of part, raises labour productivity; 6) solve the deficiency that originally will finish with several secondary diels this punching press, saved die cost, increase economic efficiency.
Description of drawings
Fig. 1 is a kind of order punching die structure figure that exchanges work for the positive and negative drawing product of the present invention;
Fig. 2 is typical box part view;
Fig. 3 is the HYDRAULIC CONTROL SYSTEM sketch;
Fig. 4 is forming technology scheme one initial position mould structure sketch, and out-draw die and in-draw punch height flush;
Fig. 5 is forming technology scheme two initial position mould structure sketches, and the out-draw die is lower than in-draw punch height;
Fig. 6 is forming technology scheme three initial position mould structure sketches, and the out-draw die is higher than in-draw punch height.
In accompanying drawing: the adjustable one-way throttle valve 28-of blank holder 16-out-draw die 17-spring 18-screw 19-pin 20-screw rod 21-upper bolster 22-stroke relay b 23-fuel tank 24-filter 25-hydraulic pump 26-overflow valve 27-check valve 29-three position four-way directional control valve in out-draw punch-die 11-die shoe 12-elastic device 13-stroke relay a 14-limited block 15-in 1-screw 2-hydraulic cylinder 3-cylinder cap 4-piston rod 5-screw 6-in-draw punch 7-guide pin bushing 8-external pressure flange 9-guide pillar 10-.
The specific embodiment
Below by embodiment and contrast accompanying drawing, further specify concrete structure of the present invention and embodiment thereof.
By Fig. 4～Fig. 6 as can be known, the object of the present invention is to provide and to realize being shaped that in-process hold to change and inside and outside imaging order variation with the compound die of a cover mechanical and hydraulic linkage, reduced number of molds, easy to operate, save installment and debugging man-hour, save the mould manufacturing expense, guarantee element precision, raise labour productivity.The below sets forth the implementation process of different inside and outside imaging order process programs respectively.
A kind of order diel out-draw die 16 of exchanging work for the positive and negative drawing product of the present invention links with piston rod 4, the control of employing mechanical and hydraulic linkage, regulate out-draw die 16 and the initial relative position of in-draw punch 6 on short transverse by piston rod 4 motions in the control hydraulic system, can also change differing heights limited block 14 in addition, thereby realize the variation of differing formed operation content.
The variation of imaging order illustrates by following 3 process programs:
Process program 1: Figure 4 shows that external shape and simultaneously stretch forming of inner counter bulge; Specific operation process is as follows: plate is put into location on the external pressure flange 8, make first the YA1 of three position four-way directional control valve 29 get electric, reversal valve 29 left positions are connected, the cavity of resorption oil-feed of hydraulic cylinder 2, by regulating choke valve 27 and overflow valve 26, make piston rod 4 upwards spur out-draw die 16 and in-draw punch 6 concordant and maintenance pressure, upper bolster 21 is descending, make interior out-draw punch-die 10 and interior blank holder 15, out-draw die 16 contacts simultaneously with external pressure flange 8, external shape and inner counter bulge stretch simultaneously, in in-draw punch 6 arrives in the out-draw punch-die 10 bottom the die time, the pressurize shaping, this moment, profile stretched a part of, interior anti-bulge has stretched and has finished, this moment, upper bolster 21 arrival lower dead center stopped, when plate touches stroke relay b22, so that the YA1 dead electricity of three position four-way directional control valve 29, YA2 gets electric, reversal valve 29 right positions are connected, the epicoele oil-feed of hydraulic cylinder 2, piston 4 promotes out-draw die 16 to be continued to move down, the remainder of stretching box part profile, when external pressure flange 8 moves to when contacting with limited block 14, system keeps pressure, and profile stretches and finishes, be that whole box part stretching is finished, this moment, external pressure flange 8 touched stroke relay a13 so that the YA2 dead electricity, and YA1 gets electric, and reversal valve 29 left positions are connected, the oil-feed of hydraulic cylinder cavity of resorption, piston rod 4 pulling out-draw dies 16 are up, upper bolster 21 up backhauls, and external pressure flange 8 and interior blank holder 15 are released box part.
Process program 2: Figure 5 shows that first the outside H that stretches, the bulge h that stretches to inner counter then, inner after namely outside first; Specific operation process is as follows: plate is put into location on the external pressure flange 8, make first the YA2 of three position four-way directional control valve 29 get electric, reversal valve 29 right positions are connected, the epicoele oil-feed of hydraulic cylinder 2, make piston rod 4 promote 16 motions of out-draw die downwards, so that out-draw die 16 and in-draw punch 6 is box part height of contour H highly apart, and maintenance hydraulic system pressure, upper bolster 21 is descending, out-draw die 16 is contacted with external pressure flange 8, stretching box part external shape, when external pressure flange 8 moves to when contacting with limited block 14, system keeps pressure, profile stretches and finishes, this moment, external pressure flange 8 touched stroke relay a13 so that the YA2 dead electricity, and YA1 gets electric, and reversal valve 29 left positions are connected, the oil-feed of hydraulic cylinder cavity of resorption, piston rod 4 pulling out-draw dies 16 are up, and at this moment upper bolster 21 continuation are descending, and interior out-draw punch-die 10 is contacted with interior blank holder 15, anti-bulge in stretching, when upper bolster 21 goes downwards to lower dead center and stops, system's pressurize shaping, at this moment anti-bulge has stretched and has finished, when plate contacts with stroke relay 22 so that the YA1 dead electricity, YA2 gets electric, upper bolster 21 up backhauls, and external pressure flange 8 and interior blank holder 15 are released box part.
Process program 3: Figure 6 shows that first to inner counter the bulge h that stretches, then to the outside H that stretches, outside after namely inner first; Specific operation process is as follows: plate is put into location on the external pressure flange 8, make first the YA1 of three position four-way directional control valve 29 get electric, reversal valve 29 left positions are connected, the cavity of resorption oil-feed of hydraulic cylinder 2, making piston rod 4 upwards spur 16 motions of out-draw die makes out-draw die 16 and in-draw punch 6 height be inner counter bump height h apart, and keeping system pressure, upper bolster 21 is descending, out-draw die 16 is contacted with interior blank holder 15, the inner counter bulge is shaped, when upper bolster 21 goes downwards to lower dead center and stops, system keeps pressure, the inner counter bulge stretches and finishes, when at this moment plate contacts with stroke relay 22 so that the YA1 dead electricity, YA2 gets electric, reversal valve 29 right positions are connected, the epicoele oil-feed of hydraulic cylinder 2, it is descending that piston rod 4 drives out-draw die 16, out-draw die 16 contacts with external pressure flange 8, the stretching external shape, when external pressure flange (8) goes downwards to when contacting with limited block 14, system keeps pressure, and profile stretches and finishes, be that whole box part stretching is finished, this moment, external pressure flange 8 touched stroke relays 13 so that the YA2 dead electricity, and YA1 gets electric, and reversal valve 29 left positions are connected, the cavity of resorption oil-feed of hydraulic cylinder 2, piston rod 4 pulling out-draw dies 16 are up, upper bolster 21 up backhauls, and external pressure flange 8 and interior blank holder 15 are released box part.
Regulate the draw speed of out-draw die 16 by adjustable one-way throttle valve 27, improve the forming property of forming speed sensitiveness plate.
Claims (9)
1. order diel of exchanging work that is used for the positive and negative drawing product, it is characterized in that: be comprised of hydraulic system and mould part, described hydraulic system comprises adjustable one-way throttle valve (27), three position four-way directional control valve (29) and piston rod (4); Described mould part comprises the interior out-draw punch-die (10) that is fixed on the die shoe (11), be fixed on out-draw die (16) and in-draw punch (6) on the upper bolster (21), out-draw die (16) motion is piston rod (4) control by hydraulic system, and the direction of motion of piston rod (4) and speed are respectively by three position four-way directional control valve (29) and adjustable one-way throttle valve (27) control, by regulating out-draw die (16) and the initial relative position of in-draw punch (6) on short transverse, and the different depth of realizing the plate out-draw by the limited block (14) that replacing is positioned at the upper differing heights of die shoe (11), realize the stamping of different operation contents; The direction that moves up and down by control out-draw die (16) changes out-draw precedence in the plate, be specially: the oil circuit in the hydraulic system links to each other with hydraulic cylinder (2) in the upper bolster (21), the A mouth of oil circuit connects the cavity of resorption of hydraulic cylinder (2), the B mouth of oil circuit connects the epicoele of hydraulic cylinder (2), consist of the loop, change the oil-feed direction by three position four-way directional control valve (29), the direction that moves up and down of control out-draw die (16).
2. a kind of order diel of exchanging work for the positive and negative drawing product as claimed in claim 1, it is characterized in that: described positive and negative drawing product is box part.
3. a kind of order diel of exchanging work for the positive and negative drawing product as claimed in claim 1, it is characterized in that: the die depth in the interior out-draw punch-die (10) equals the height h of the inner counter bulge of positive and negative drawing product; The degree of depth of described plate out-draw equals the height H of positive and negative drawing product.
4. a kind of order diel of exchanging work for the positive and negative drawing product as claimed in claim 1, it is characterized in that: the length of positive and negative drawing product (A) and width (B) equal respectively length and the width of interior out-draw punch-die (10); The length (a) of the inner counter bulge of positive and negative drawing product and width (b) equal respectively length and the width of in-draw punch (6).
5. a kind of order diel of exchanging work for the positive and negative drawing product as claimed in claim 1, it is characterized in that: when the left position of three position four-way directional control valve (29) is connected, hydraulic oil enters hydraulic cylinder (2) cavity of resorption from the A mouth, control out-draw die (16) moves upward, and hydraulic oil is from hydraulic cylinder (2) epicoele and flow back to the fuel tank of hydraulic system through the B mouth; When the right position of three position four-way directional control valve (29) was connected, oil entered the epicoele of hydraulic cylinder (2) from the B mouth, and control out-draw die (16) moves downward, and hydraulic oil is from hydraulic cylinder (2) cavity of resorption and flow back to the fuel tank of hydraulic system through the A mouth.
6. a kind of order diel of exchanging work for the positive and negative drawing product as claimed in claim 1, it is characterized in that: when out-draw die (16) and in-draw punch (6) highly flush, during upper bolster (21) punching press downwards, realize external shape and simultaneously stretch forming of inner counter bulge.
7. a kind of order diel of exchanging work for the positive and negative drawing product as claimed in claim 1, it is characterized in that: when out-draw die (16) is lower than in-draw punch (6) height, during upper bolster (21) punching press downwards, realize first external shape being stretched, then bulge stretches to inner counter.
8. a kind of order diel of exchanging work for the positive and negative drawing product as claimed in claim 1, it is characterized in that: when out-draw die (16) is higher than in-draw punch (6) height, during upper bolster (21) punching press downwards, realize that bulge stretches to inner counter first, then stretches to external shape.
9. a kind of order diel of exchanging work for the positive and negative drawing product as claimed in claim 1 is characterized in that: regulate the draw speed of out-draw die (16) by adjustable one-way throttle valve (27), improve the forming property of forming speed sensitiveness plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010548532 CN102049446B (en) | 2010-11-18 | 2010-11-18 | Variable-procedure stamping die for positive and negative stretching of parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010548532 CN102049446B (en) | 2010-11-18 | 2010-11-18 | Variable-procedure stamping die for positive and negative stretching of parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102049446A CN102049446A (en) | 2011-05-11 |
| CN102049446B true CN102049446B (en) | 2013-01-23 |
Family
ID=43954436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010548532 Expired - Fee Related CN102049446B (en) | 2010-11-18 | 2010-11-18 | Variable-procedure stamping die for positive and negative stretching of parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102049446B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240332B (en) * | 2013-04-03 | 2016-08-10 | 东莞市华世邦精密模具有限公司 | The manufacture method of blind flange base |
| AU2015332413B2 (en) | 2014-10-15 | 2018-10-04 | Ball Metalpack, Llc | Apparatus and method for forming shoulder and neck of metallic container |
| CA2964384C (en) * | 2014-10-28 | 2018-12-11 | Ball Corporation | Apparatus and method for forming a cup with a reformed bottom |
| CN106002288B (en) * | 2016-01-28 | 2018-01-16 | 苏州金童机械制造股份有限公司 | Complete to cut the shaped device and moulding process of bending using single power source |
| CN110834050A (en) * | 2018-12-31 | 2020-02-25 | 苏州市亿特隆科技有限公司 | Rapid stamping process of base |
| CN110076232B (en) * | 2019-04-24 | 2024-06-18 | 宁波骏腾模具科技有限公司 | Stamping die with positive and negative deep-drawing structure |
| CN112170648B (en) * | 2020-09-15 | 2021-08-31 | 燕山大学 | Double-layer cylindrical part forward and backward deep drawing forming die and method |
| CN115634993B (en) * | 2022-12-23 | 2023-03-10 | 吉林大学 | Floating type blank pressing hydraulic bidirectional single-mode deep drawing forming device and forming method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3435653A (en) * | 1966-01-21 | 1969-04-01 | Nat Dairy Prod Corp | Forming method and apparatus |
| CN2920474Y (en) * | 2006-07-24 | 2007-07-11 | 天津市亚西拉伸机械有限公司 | Digital controlled hydraulic stretching machine |
| CN101244439A (en) * | 2008-02-29 | 2008-08-20 | 西安交通大学 | Design method for mechanical-hydraulic auxiliary reverse redrawing mold |
| CN101491819A (en) * | 2009-03-12 | 2009-07-29 | 长春三友汽车部件制造有限公司 | Sedan B-post high-strength plate cold stretching-forming die and technique |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6016854B2 (en) * | 1980-07-17 | 1985-04-27 | 日立造船株式会社 | Double sink integral molding method |
-
2010
- 2010-11-18 CN CN 201010548532 patent/CN102049446B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3435653A (en) * | 1966-01-21 | 1969-04-01 | Nat Dairy Prod Corp | Forming method and apparatus |
| CN2920474Y (en) * | 2006-07-24 | 2007-07-11 | 天津市亚西拉伸机械有限公司 | Digital controlled hydraulic stretching machine |
| CN101244439A (en) * | 2008-02-29 | 2008-08-20 | 西安交通大学 | Design method for mechanical-hydraulic auxiliary reverse redrawing mold |
| CN101491819A (en) * | 2009-03-12 | 2009-07-29 | 长春三友汽车部件制造有限公司 | Sedan B-post high-strength plate cold stretching-forming die and technique |
Non-Patent Citations (1)
| Title |
|---|
| JP昭57-22827A 1982.02.05 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102049446A (en) | 2011-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102049446B (en) | Variable-procedure stamping die for positive and negative stretching of parts | |
| CN101912926B (en) | Multipurpose sheet metal stamping die-set for positive edge pressing | |
| CN203565653U (en) | Continuous forming die | |
| CN202239285U (en) | Stretching threading mechanism for stamping | |
| CN203495015U (en) | One-step stamping and shaping mold | |
| CN106378390A (en) | Switchable side punching stamping die | |
| CN203711639U (en) | Cold stamping drawing die | |
| CN103599984A (en) | Trunk hinge fixed seat machining forming process | |
| CN202715717U (en) | Multi-station gear-shaving fine punching mold for multi-gear punching piece | |
| CN202479300U (en) | Negative angle flanging mechanism for multistage transmission vehicle door external panel | |
| CN201960038U (en) | Deep drawing die for producing bowl-shaped ornaments | |
| CN203791462U (en) | Drawing die with upper movable material pressing core and lower movable material pressing core | |
| CN202984563U (en) | Double-mould three-station device | |
| CN203751132U (en) | Punching-riveting continuous punching die | |
| CN206824508U (en) | A kind of time-delay mechanism's drawing die of electrified control | |
| CN103111526A (en) | Metal plate bending die | |
| CN203245261U (en) | Bending die of sheet metal materials | |
| CN202114153U (en) | Stamping die with draw step structure for automotive panel | |
| CN201470798U (en) | One-step forming mould for alien spring | |
| CN204638892U (en) | The drawing die of cylindrical shape sheet metal component | |
| CN210817115U (en) | Mechanical in-mold feeding mechanism | |
| CN204975005U (en) | Continuous stamping die of car warm braw motor end cover bottom plate | |
| CN209156844U (en) | A kind of double blanking stamping die | |
| CN205380203U (en) | Cold stamping die's upper and lower pair of blank holder drawing die structure | |
| CN203091540U (en) | Pneumatic exchange press tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20110511 Assignee: Nanjing Milky Way Car assessories Co., Ltd Assignor: Jiangsu University Contract record no.: 2014320010052 Denomination of invention: Variable-procedure stamping die for positive and negative stretching of parts Granted publication date: 20130123 License type: Exclusive License Record date: 20140428 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| EM01 | Change of recordation of patent licensing contract |
Change date: 20150202 Contract record no.: 2014320010052 Assignee after: NANJING TIANHE AUTO PARTS CO., LTD. Assignee before: Nanjing Milky Way Car assessories Co., Ltd |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20181118 |