CN102641982A - Die for multi-stage automatic cold die forging of armor-piercing steel nails and forging process of die - Google Patents
Die for multi-stage automatic cold die forging of armor-piercing steel nails and forging process of die Download PDFInfo
- Publication number
- CN102641982A CN102641982A CN2012101397527A CN201210139752A CN102641982A CN 102641982 A CN102641982 A CN 102641982A CN 2012101397527 A CN2012101397527 A CN 2012101397527A CN 201210139752 A CN201210139752 A CN 201210139752A CN 102641982 A CN102641982 A CN 102641982A
- Authority
- CN
- China
- Prior art keywords
- die
- forging
- lock chamber
- mould
- steel nail
- 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
Images
Landscapes
- Forging (AREA)
Abstract
A die for multi-stage automatic cold die forging of armor-piercing steel nails and a forging process of the die belong to the technical field of mechanic forging. The die comprises a female die, a male die and a piston ejection mechanism, wherein the female die, the male die and the piston ejection mechanism are coaxially arranged, materials to be forged are mounted in the female die, the female die is arranged in the piston ejection mechanism in a sliding mode, and the tail end of the female die is connected with the piston ejection mechanism. The piston ejection mechanism comprises a fixing chamber, a buffering piece and an ejection piece, wherein the buffering piece and the ejection piece are sequentially disposed in the fixing chamber in a sliding mode, two ends of the buffering piece are connected with the tail end of the fixing chamber and the tail end of the female die respectively, the ejection piece sequentially penetrates through the fixing chamber and the buffering piece to contact with the materials to be forged in the female die, a first step and an opening are mounted on two ends of the inner surface of the fixing chamber respectively, the female die and the buffering piece are sequentially arranged in the fixing chamber in a sliding mode and limited by the first step, and the ejection piece penetrates through the fixing chamber through the opening. According to the die for the multi-stage automatic cold die forging of the armor-piercing steel nails and the forging process of the die, ejector rods are short, and the female die isn't influenced by the ejector rods at the moment of the forming of the ejector rods, so that the service life of the ejector rods are prolonged.
Description
Technical field
What the present invention relates to is a kind of device and method of mechanical technical field of forging, specifically is a kind of mould and Forging Technology thereof that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging that be used for.
Background technology
In machinery manufacturing industry, often need the elongated rod member of die forging, as have the stock of flange, have the high strength steel nail of armor-penetrating ability, bar portion is elongated, even an end of bar also will have point.Such forging die device must be furnished with and ejects the forging requirement after rational distortion work step and elongated push rod can satisfy finish-forging.Just the condition of production is seen at present, because the design of distortion work step is unreasonable, the so elongated push rod life-span is extremely short, can not satisfy the especially mass automatic production demand of producing far away.
Retrieval through to prior art is found, Chinese patent document number CN101181813A, open day 2007-12-14; Put down in writing a kind of major-minor multi-push injection mold pushing mechanism, this technology discloses: moving platen is provided with gusset, and gusset and moving platen main body parallel; Liftout plate is between gusset and moving platen main body; Gripper shoe is passed liftout plate, two ends respectively with gusset and moving platen main body Joint, eject oil cylinder and comprise and main eject oil cylinder and auxiliary top goes out oil cylinder.But should technology only be the ejecting mechanism of injection mould, be not the cold die forging method that penetrates the armour-piercing steel nail of hard objects such as steel plate, concrete.The ejecting force of moulding is much littler as and much easier than steel cold forging spare, and the push rod of Ejection Mechanism of Injection Mould can not eject usefulness as armour-piercing steel nail cold-forging die.
Chinese patent document number CN202037289U; Open day 2011-11-16; Put down in writing a kind of cold-forging die of U iron; This technology comprises drift 1, die 2, punch push rod 3, ejector 4 and backing plate 5, and it is fixing that described punch push rod 3 matched in clearance are connected in die 2 and with backing plate 5, and described drift 1, die 2, punch push rod 3 and ejector 4 constitute the punching press die cavity; It is characterized in that: be provided with the elasticity ejector apparatus between described die 2 and the backing plate 5, described die 2 is connected with backing plate 5 movingly; Described ejector 4 is movingly in the gap between die 2 and punch push rod 3.But should technology only be common cold stamp forging mould structure, be a simple cold die forging of single mode thorax, and the armour-piercing steel nail is only used the die forging of single mode thorax, can not accomplish the cold deformation of high strength alloy steel.
Summary of the invention
The present invention is directed to the above-mentioned deficiency that prior art exists; A kind of mould and Forging Technology thereof that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging that be used for is provided; The slender rod piece pointed portion mechanical property that forging obtains is good; And the knock-pin life-span of mould is long, and the multiplex (MUX) who satisfies automation size production goes on foot cold die forging needs.
The present invention realizes through following technical scheme:
The present invention relates to a kind of mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging that is used for; Comprise: the die of coaxial setting, punch and the piston ejecting mechanism that has lock chamber, bolster and ejection piece, wherein: the built-in die of waiting to forge material slides and is arranged in the piston ejecting mechanism and the end of die links to each other with the piston ejecting mechanism; Bolster and ejection piece slide successively and are arranged at lock chamber inside.
The two ends of described bolster link to each other with the end of lock chamber and the end of die respectively.
Described ejection piece passes lock chamber and bolster successively and contacts with material to be forged in being arranged at die.
The inner surface two ends of described lock chamber are respectively equipped with first step and opening, and said die and bolster slide successively and be arranged at lock chamber inside and spacing by the first step realization, and said ejection piece passes lock chamber through opening.
The interior front of described lock chamber is fixed with the lining that limits the die sliding position.
Described ejection piece is the secondary stretching structure, comprising: the post rod mechanism of coaxial setting and transfer bar mechanism, wherein: post rod mechanism is movably set in bolster and the die, and transfer bar mechanism is movably set in bolster and the lock chamber.
Described post rod mechanism comprises first body of rod and jacking block, and wherein: first body of rod external diameter and die internal diameter are complementary and slide and be arranged at die inside, and jacking block links to each other with first body of rod end and is positioned at the die outside.
Described bolster comprises elastic parts and end bearing, and wherein: elastic parts is through pre-compressed spring or hydraulic pressure or air pressure realization.
Described transfer bar mechanism comprises second body of rod and pushing block, and wherein: second body of rod external diameter is complementary with the internal diameter of end bearing and two ends link to each other with pushing block with jacking block respectively, and pushing block drives between end bearing and lock chamber and by lathe and realizes stretching motion.
Described end bearing holds for the mortar profile shaft, and the middle part of end bearing is provided with second step, and said jacking block realizes that through second step spacing and jacking block contacts at the second step place with second body of rod.
Be provided with the work die cavity in the described punch, this work type cavity configuration is an inner cone.
The cone angle of the inner cone of described work die cavity is 50 °-10 °, is preferably 45 °-15 °.
The present invention relates to above-mentioned steel nail die forging method, may further comprise the steps:
The first step, material to be forged is arranged in the die of above-mentioned mould, the cone angle that uses the work die cavity is 45 ° a punch, with punch and die matched moulds, makes the extreme position of die forced-slip until elastic parts, waits to forge the material stress deformation;
The cone angle of second step, use work die cavity is 30 ° a punch; The pointed nose length of waiting to forge material is 1.175d, and wherein, d is a cylindrical section cross-sectional diameter of waiting to forge material, with punch and die matched moulds, makes the extreme position of die forced-slip until elastic parts, carries out the second work step cold forging;
The cone angle of the 3rd step, use work die cavity is 15 ° a punch; The pointed nose length of waiting to forge material is 1.81d, and wherein, d is a cylindrical section cross-sectional diameter of waiting to forge material, with punch and die matched moulds, makes the extreme position of die forced-slip until elastic parts, carries out the 3rd work step cold forging.
The present invention relates to the high strength armour-piercing steel nail that the said method manufacturing obtains; The cylindrical section length of steel nail and the ratio of cylindrical section cross-sectional diameter are 4.3; The top of steel nail is
bulb, and top intensity is 800～1000MPa.
Knock-pin length of the present invention is little, does not feed through to die in the moment that is shaped especially, the life-span of therefore having improved knock-pin.
Because the enlarged diameter and the thickness of the block of knock-pin one end also strengthen, thus the bearing capacity of the axial load of knock-pin increased, thus reduce the contact stress of knock-pin end.The block of push rod end overstriking can slide in the groove of end bearing, thereby has reduced push rod length, also can not disturb the taking-up forging, so, improved the knock-pin life-span.
Description of drawings
Fig. 1 is mould structure of the present invention and elongated push rod ejecting mechanism figure;
Among the figure: the a-die forging begins moment, b-die forging final instants, and the c-semi-finished product take out moment.
Fig. 2 is a high-intensity armour-piercing steel nail cold plasticity shaping work step sketch map among the embodiment;
Among the figure: to be processed of a-inserts in the mould, and in the b-die forging, the c-die forging finishes.
The specific embodiment
Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
Embodiment
Present embodiment forges high strength armour-piercing steel nail, and listed armour-piercing steel nail typical structure characteristics have and penetrate various barrier mechanical properties, have design and accomplish cold die forging multiplex (MUX) step process process separately.One of main technique problem that is proposed---guarantee strong mechanical performance material forming minimum fault rate, especially a nose part.
Present embodiment steel nail cylindrical section cross-sectional diameter d is the 42crMo annealed state for
material; The cold forging target is: the conical section length of steel nail is 36.6mm; Cone angle is 15 °; The top of steel nail is diameter
bulb, and top intensity reaches 800～1000MPa.
As shown in Figure 1, the die 1 of the coaxial setting of present embodiment, punch 2 and piston ejecting mechanism 3, the built-in die 1 of waiting to forge material 4 slide and are arranged in the piston ejecting mechanism 3 and terminally link to each other with piston ejecting mechanism 3.
Described piston ejecting mechanism 3 comprises: lock chamber 5 and slide successively and be arranged at its inner bolster 6 and ejection piece 7.
The two ends of described bolster 6 link to each other with the end of lock chamber 5 and the end of die 1 respectively;
Described ejection piece 7 pass successively lock chamber 5 and bolster 6 and be arranged at die 1 in wait that forging material 4 contacts.
The inner surface two ends of described lock chamber 5 are respectively equipped with first step 8 and opening 9, and said die 1 slides successively with bolster 6 and is arranged at lock chamber 5 inside and spacing by first step 8 realizations, and said ejection piece 7 passes lock chamber 5 through opening 9.
The interior front of described lock chamber 5 is fixed with the lining 10 that limits die 1 sliding position.
Described ejection piece 7 is the secondary stretching structure, comprising: the post rod mechanism 11 and the transfer bar mechanism 12 of coaxial setting, wherein: a linkage 11 is movably set in bolster 6 and the die 1, and transfer bar mechanism 12 is movably set in bolster 6 and the lock chamber 5.
Described post rod mechanism 11 comprises first body of rod 13 and jacking block 14, and wherein: first body of rod, 13 external diameters and die 1 internal diameter are complementary and slide and be arranged at die 1 inside, and jacking block 14 links to each other with first body of rod, 13 ends and is positioned at die 1 outside.
Described bolster 6 comprises elastic parts 15 and end bearing 16, and wherein: elastic parts 15 is through pre-compressed spring or hydraulic pressure or air pressure realization.
Described transfer bar mechanism 12 comprises second body of rod 17 and pushing block 18; Wherein: second body of rod, 17 external diameters are complementary with the internal diameter of end bearing 16 and two ends contact with jacking block 14 respectively and link to each other with pushing block 18, and pushing block 18 is between end bearing 16 and lock chamber 5 and by lathe drive realization stretching motion.
Described end bearing 16 holds for the mortar profile shaft, and the middle part of end bearing 16 is provided with second step 19, and said jacking block 14 realizes that through second step 19 spacing and jacking block 14 contacts at second step 19 places with second body of rod 17.
Be provided with the work die cavity in the described punch 2, this work type cavity configuration is an inner cone.
The cone angle of the inner cone of described work die cavity is 50 °-10 °, is preferably 45 °-15 °.
To be processed 14 of present embodiment is annealed and through surface treatment, d=10mm, and length overall is 50mm; Material is 42CrMo, places between punch 1 and the die 2, and is as shown in Figure 1; Present embodiment uses vertical mo(u)ldenpress, under the press table top liftout attachment is set, when press slide to descending; Shaping blank tip in the work shape chamber of punch 1 comprises step afterwards:
The first step, will wait to forge in the die 1 that material 4 is arranged at above-mentioned mould; The cone angle of use work die cavity is 45 ° a punch 2; Punch 2 and die 1 matched moulds; Die 1 forced-slip is until the extreme position of elastic parts 15, and distortion only limits to wait to forge the pointed nose volume of material 4, and realizes die forging band cone angle part semi-finished product; These semi-finished product have 45 ° of cone angles, and the long 11.75mm of cone, cylinder segment length are 46.08mm.
The cone angle of second step, use work die cavity is 30 ° a punch 2; The cone angle of the work die cavity of punch 2 reduces; At the bottom of the awl that the work die cavity initial contact link that semi-finished product are treated forging 4 and punch 2 is shaped along the first step; Expand to bar portion peak subsequently; And cylinder blank is not out of shape volume pulls the participation distortion by force in the first step, be 18.1mm through this half-finished pointed nose length in work step distortion back, the cylinder segment length is 43.97mm.
The cone angle of the 3rd step, use work die cavity is 15 ° a punch 2; Through this half-finished pointed nose length in work step distortion back is 36.6mm, and the cylinder segment length is 37.8mm.
Each work step is shaped and finishes, and the work of press liftout tank promotes force application rod 7 driving knock-pins 3 and ejects workpiece.
Pointed like calculating and experimental studies results; The die forging method that is proposed with have same work step cone angle work die cavity die forging punch and compare; Realizing that the steel nail material improves under the mechanical property condition; Especially in position, bar tip, materials used plasticity storage at utmost, the thermochemical cycles during having reduced the quantity of shaping work step and having abandoned former process forming.
In the whole process that is shaped, punch 2 is not beaten with die 1 and is leaned on, thereby has eliminated the impulsive force between punch-die; Novel mould structure has shortened the length of knock-pin; Reasonably the distortion standard guarantees the mechanical property of high strength steel nail and has reduced the distortion work step.
Claims (10)
1. one kind is used for the mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging; It is characterized in that; Comprise: the die of coaxial setting, punch and the piston ejecting mechanism that has lock chamber, bolster and ejection piece, wherein: the built-in die of waiting to forge material slides and is arranged in the piston ejecting mechanism and the end of die links to each other with the piston ejecting mechanism; Bolster and ejection piece slide successively and are arranged at lock chamber inside, and: the two ends of bolster link to each other with the end of lock chamber and the end of die respectively; Ejection piece passes lock chamber and bolster successively and contacts with material to be forged in being arranged at die; Be provided with the work die cavity of inner cone structure in the punch.
2. according to claim 1ly be used for the mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging; It is characterized in that; The inner surface two ends of described lock chamber are respectively equipped with first step and opening; Said die and bolster slide successively and are arranged at lock chamber inside and spacing by the first step realization, and said ejection piece passes lock chamber through opening; The interior front of described lock chamber is fixed with the lining that limits the die sliding position.
3. according to claim 1 and 2ly be used for the mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging; It is characterized in that; Described ejection piece is the secondary stretching structure; Comprise: the post rod mechanism of coaxial setting and transfer bar mechanism, wherein: post rod mechanism is movably set in bolster and the die, and transfer bar mechanism is movably set in bolster and the lock chamber.
4. according to claim 3ly be used for the mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging; It is characterized in that; Described post rod mechanism comprises first body of rod and jacking block; Wherein: first body of rod external diameter and die internal diameter are complementary and slide and be arranged at die inside, and jacking block links to each other with first body of rod end and is positioned at the die outside.
5. according to claim 1 and 2ly be used for the mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging, it is characterized in that described bolster comprises elastic parts and end bearing, wherein: elastic parts is realized through pre-compressed spring or hydraulic pressure or air pressure.
6. according to claim 5ly be used for the mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging; It is characterized in that; Described transfer bar mechanism comprises second body of rod and pushing block; Wherein: second body of rod external diameter is complementary with the internal diameter of end bearing and two ends link to each other with pushing block with jacking block respectively, and pushing block drives between end bearing and lock chamber and by lathe and realizes stretching motion.
7. according to claim 5ly be used for the mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging; It is characterized in that; Described end bearing holds for the mortar profile shaft, and the middle part of end bearing is provided with second step, and said jacking block realizes that through second step spacing and jacking block contacts at the second step place with second body of rod.
8. according to claim 1ly be used for the mould that armour-piercing steel nail multiplex (MUX) goes on foot automatic cold die forging, it is characterized in that the cone angle of the inner cone of described work die cavity is 50 °-10 °.
9. a Forging Technology of using the said mould of above-mentioned arbitrary claim is characterized in that, may further comprise the steps:
The first step, material to be forged is arranged in the die of above-mentioned mould, the cone angle that uses the work die cavity is 45 ° a punch, and with punch and die matched moulds, the die forced-slip is until the extreme position of elastic parts;
The cone angle of second step, use work die cavity is 30 ° a punch;
The cone angle of the 3rd step, use work die cavity is 15 ° a punch.
10. high strength armour-piercing steel nail that uses the said method manufacturing of claim 9 to obtain; It is characterized in that; The top of steel nail is
bulb, and top intensity is 800～1000MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210139752.7A CN102641982B (en) | 2012-05-08 | 2012-05-08 | Die for multi-stage automatic cold die forging of armor-piercing steel nails and forging process of die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210139752.7A CN102641982B (en) | 2012-05-08 | 2012-05-08 | Die for multi-stage automatic cold die forging of armor-piercing steel nails and forging process of die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102641982A true CN102641982A (en) | 2012-08-22 |
| CN102641982B CN102641982B (en) | 2014-11-12 |
Family
ID=46655203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210139752.7A Active CN102641982B (en) | 2012-05-08 | 2012-05-08 | Die for multi-stage automatic cold die forging of armor-piercing steel nails and forging process of die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102641982B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537486A (en) * | 2016-01-21 | 2016-05-04 | 浙江机电职业技术学院 | Counter-forcible-restraining machining die for part punching |
| CN108723278A (en) * | 2018-05-11 | 2018-11-02 | 盐城杰精机械制造有限公司 | A kind of riveting machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS539349U (en) * | 1977-07-15 | 1978-01-26 | ||
| JPH0539349U (en) * | 1991-10-31 | 1993-05-28 | 岩崎工業株式会社 | Drawer storage basket |
| JP2004114086A (en) * | 2002-09-25 | 2004-04-15 | Musashi Seimitsu Ind Co Ltd | Forging device |
| CN201064814Y (en) * | 2007-06-15 | 2008-05-28 | 上海上标汽车紧固件有限公司 | Special-purpose welding bolt forming die |
| CN201189547Y (en) * | 2008-05-09 | 2009-02-04 | 襄樊市宏盛昌电子机械有限责任公司 | Electrode forming die for discharge tubes |
| CN102284665A (en) * | 2011-08-29 | 2011-12-21 | 瑞标集团有限公司 | Cold-heading die for sealing bolt |
-
2012
- 2012-05-08 CN CN201210139752.7A patent/CN102641982B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS539349U (en) * | 1977-07-15 | 1978-01-26 | ||
| JPH0539349U (en) * | 1991-10-31 | 1993-05-28 | 岩崎工業株式会社 | Drawer storage basket |
| JP2004114086A (en) * | 2002-09-25 | 2004-04-15 | Musashi Seimitsu Ind Co Ltd | Forging device |
| CN201064814Y (en) * | 2007-06-15 | 2008-05-28 | 上海上标汽车紧固件有限公司 | Special-purpose welding bolt forming die |
| CN201189547Y (en) * | 2008-05-09 | 2009-02-04 | 襄樊市宏盛昌电子机械有限责任公司 | Electrode forming die for discharge tubes |
| CN102284665A (en) * | 2011-08-29 | 2011-12-21 | 瑞标集团有限公司 | Cold-heading die for sealing bolt |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537486A (en) * | 2016-01-21 | 2016-05-04 | 浙江机电职业技术学院 | Counter-forcible-restraining machining die for part punching |
| CN105537486B (en) * | 2016-01-21 | 2018-09-11 | 浙江机电职业技术学院 | The anti-intense beam processing mold of part punching |
| CN108723278A (en) * | 2018-05-11 | 2018-11-02 | 盐城杰精机械制造有限公司 | A kind of riveting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102641982B (en) | 2014-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101693264B (en) | Large equal channel angular large-strain extrusion die | |
| KR20100022448A (en) | Method and device for manufacturing fastenings and fasteners with radial outer contours, especially screws or threaded bolts | |
| CN102357599B (en) | Progressive stamping die for producing thin-wall metal rings | |
| CN104384348B (en) | One-step deep-drawing forming die for cylindrical metallic components | |
| US7845935B2 (en) | Lightweight knockout for forming die assembly | |
| CN103240359B (en) | Near-net forming method of high-strength internal hexagon bored bolt | |
| CN203002943U (en) | Right-handed compound die | |
| CN102641982B (en) | Die for multi-stage automatic cold die forging of armor-piercing steel nails and forging process of die | |
| CN213496268U (en) | Cold header die and cold header | |
| CN103252409B (en) | Near-net forming die for high-strength internal hexagonal through-hole bolt | |
| CN209792508U (en) | Double-punching forging die | |
| CN202984425U (en) | Constant force blank pressing drawing die | |
| CN115415457A (en) | Machining process and cold heading die for hexagonal flange bolt | |
| CN106111877B (en) | Wheel hub inner ring forges continuous mould | |
| CN113787162A (en) | Machining device and forming machining method for hexagon flange face bolt | |
| CN210996279U (en) | Novel forging die ejector rod structure | |
| CN114393051A (en) | Die for composite cold extrusion forming of automobile micro motor aluminum shell and use method | |
| CN206046988U (en) | Wheel hub inner ring forges continuous mould | |
| CN207127176U (en) | A kind of ball-and-socket forging mold | |
| CN105964801A (en) | Stamping die | |
| RU48287U1 (en) | STAMP FOR MANUFACTURE OF HOLLOW DETAILS | |
| CN216540702U (en) | Machining device for hexagonal flange face bolt and hexagonal flange face bolt | |
| CN104289652A (en) | Extrusion forming cold-upsetting die and application method thereof | |
| JPS6284849A (en) | Manufacture of ring | |
| CN220426740U (en) | Screw cold forging forming equipment |
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 | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI AUTOMOTIVE TRANSMISSION CO., LTD. Free format text: FORMER OWNER: SHANGHAI BAOJIE VEHICLE PARTS FORGING AND PRESS CO. LTD Effective date: 20150304 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150304 Address after: 201822 Yecheng Road, Shanghai, No. 506, No. Patentee after: Shanghai Automotive Transmission Co., Ltd. Address before: 201822 Shanghai city Jiading District Jiajian Road No. 258 Patentee before: Shanghai Baojie Vehicle Parts Forging and Press Co. Ltd |