CN106694789A - Die forging process and equipment of besides-star wheel and star wheel blanks for automobile drive shaft - Google Patents

Die forging process and equipment of besides-star wheel and star wheel blanks for automobile drive shaft Download PDF

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Publication number
CN106694789A
CN106694789A CN201710092512.9A CN201710092512A CN106694789A CN 106694789 A CN106694789 A CN 106694789A CN 201710092512 A CN201710092512 A CN 201710092512A CN 106694789 A CN106694789 A CN 106694789A
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CN
China
Prior art keywords
star
wheel
forging
interior
blank
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
Application number
CN201710092512.9A
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Chinese (zh)
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CN106694789B (en
Inventor
孙礼宾
徐杨
沈江
徐杰
汪磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Nanyang Zhongjing science and Technology Co., Ltd.
Original Assignee
Shanghai Jd Chukyo Forging & Stamping Co Ltd
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Priority to CN201710092512.9A priority Critical patent/CN106694789B/en
Publication of CN106694789A publication Critical patent/CN106694789A/en
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Publication of CN106694789B publication Critical patent/CN106694789B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/28Making machine elements wheels; discs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/02Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14Dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/24Perforating, i.e. punching holes
    • B21D28/34Perforating tools; Die holders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/10Die sets; Pillar guides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02Die forging; Trimming by making use of special dies ; Punching during forging

Abstract

The invention relates to a die forging process of besides-star wheel and star wheel blanks for an automobile drive shaft. The die forging process is characterized by comprising the following steps: S1. pre-forging: the shape between an upper die core and a lower die core of a pre-forging die is of a structure of connecting a besides-star wheel blank with a star wheel blank into a whole, wherein the bottom of the besides-star wheel blank and the upper part of the star-wheel blank are connected into a whole; S2. final forging: the pre-forged blank is forged and formed; and S3. stamping cutting: the star wheel blank and the besides-star wheel blank of the final forged blank are cut by a stamping method. The forging process is scientifically made by comprehensively analyzing the shape, size and technical requirements of the same metal workpiece so as to achieve the purpose of saving labor and saving materials.

Description

Out star wheel used for vehicle transmission shaft, interior star-wheel blank contour forging technique and equipment
Technical field
The present invention relates to a kind of contour forging technique and equipment, and in particular to a kind of truck drive shaft out star wheel, interior star-wheel blank Contour forging technique and equipment, belong to truck drive shaft parts contour forging technique technical field.
Background technology
The inside and outside star-wheel of truck drive shaft is assembled together, and the transmission in rotation direction is realized by ball.Automobile is passed The inside and outside star-wheel of moving axis is the important spare part of truck drive shaft.
During manufacture, blank is forged existing inside and outside star-wheel respectively by the way of die forging, then right again Blank is machined.
The manufacture of transmission, internal, the independent forging of out star wheel blank is forged, and gross weight is produced during punching, causes life Produce inefficient, stock utilization not high, and workload in process of production is than larger;And it is used for vehicle transmission shaft extraterrestrial There is more punching in wheel, interior star-wheel product, the shared material consumption of material of punching recess is more, and the utilization rate of material is low, following process High cost.
The content of the invention
The purpose of the present invention is:By inside and outside star-wheel blank single piece forging be changed to 2 combine carry out blanking, forging, Preferable effect can from many aspects be obtained:Mitigate the labour intensity of workman, improve production efficiency is saved metal material, reduced Energy resource consumption.
The present invention takes following technical scheme:
A kind of out star wheel used for vehicle transmission shaft, interior star-wheel blank contour forging technique, it is characterised in that comprise the following steps:S1、 Pre-forging:It is shaped as what out star wheel blank and interior star-wheel blank were connected as a single entity between the upper mold core and lower mold core of pre-forging mould Structure, wherein out star wheel blank bottom are connected as a single entity with the top of interior star-wheel blank;S2, finish-forging are made:The base completed to pre-forging Part further carries out forging forming;S3, punching press segmentation:The interior star-wheel blank of the blank after finish-forging is made by the way of the punching press and Out star wheel blank is separated.
Further, when finish-forging is made:The height of inside and outside star-wheel blank connecting portion is A, and interior out star wheel connecting portion is to interior The distance of star-wheel upper end is B, and the width of interior out star wheel connecting portion is C, and the height of out star wheel is F, and the height of interior star-wheel is H; During pre-forging:The height of inside and outside star-wheel blank connecting portion is D, and interior out star wheel connecting portion to the distance of interior star-wheel upper end is E, the height of out star wheel is G, and the height of interior star-wheel is I;Then:A=3-4mm, B=0-5mm, C=0.5-0.8mm, D=A+1mm, E=B, G=F+1mm, I=H+0.5mm.
Further, when the punching press is split, interior out star wheel connecting portion uses direct punching trimming.
Out star wheel used for vehicle transmission shaft, the equipment of interior star-wheel blank contour forging technique, its feature described in a kind of claim 1 It is:Including blocking manufacturing apparatus, finish-forging manufacturing apparatus, die cut equipment;The upper mold core of the blocking manufacturing apparatus and lower mold core it Between the pre-forging structure that is connected as a single entity with interior star-wheel blank for out star wheel blank of spatial form, wherein out star wheel blank bottom with The top of interior star-wheel blank is connected as a single entity;Spatial form between the upper mold core and lower mold core of the finish-forging manufacturing apparatus is out star wheel The whole forging structure that blank is connected as a single entity with interior star-wheel blank;The die cut equipment includes being fixed on the lower section of upper bolster 10 Punching forgings trimming punch 13, stripper 8 in set forging;The stripper 8 is connected by elastic mechanism with upper bolster 10, and with treat Forging blank out star wheel blank portions top is corresponding;Punching forgings trimming punch 13 is fixed with upper bolster 10 and connected in the set forging Connect, and it is corresponding with star-wheel blank portions top in blank to be forged.
Further, the external diameter of punching forgings trimming punch 13 is slightly less than the out star wheel blank portions in the set forging Minimum diameter.
Further, the die cavity of finish-forging manufacturing apparatus:The height of inside and outside star-wheel blank connecting portion is A, interior out star wheel connection The distance of position to interior star-wheel upper end is B, and the width of interior out star wheel connecting portion is C, and the height of out star wheel is F, interior star-wheel Highly it is H;The die cavity of blocking manufacturing apparatus:The height of inside and outside star-wheel blank connecting portion is D, and interior out star wheel connecting portion is to interior The distance of star-wheel upper end is E, and the height of out star wheel is G, and the height of interior star-wheel is I;Then:A=3-4mm, B=0-5mm, C= 0.5-0.8mm, D=(A+1) mm, E=B, G=(F+1) mm, I=(H+0.5) mm.
Further, blocking manufacturing apparatus, finish-forging manufacturing apparatus are two halves formula package assembly.
The beneficial effects of the present invention are:
1) shape to same metal material work piece, size and technical requirements are analyzed, and integrate the system of science Forging technology is determined, to realize the purpose of saving of labor, material-saving.
2) compared to traditional forging method, allowance is reduced, mitigates single-piece forge weight, and be conducive to machining, subtracted The number of times that is installed of few workpiece, is that machining creates favorable conditions;
3) metal of blanking saw kerf is saved, when reducing blankers, while reduce heating twice, oxidation is reduced, forging is reduced Part quality, saves fuel;
4) quantity of trimming waste material is substantially reduced, and improves the utilization rate of material, reduces cost;
5) by inside and outside star-wheel blank single piece forging be changed to 2 combine carry out blanking, forging, can be from many aspects Obtain preferable effect:Mitigate the labour intensity of workman, improve production efficiency is saved metal material, reduces energy resource consumption.
6) Hookean region uses Hook laws, and plastic region is accurate using Prandtl-Reuss constitutive equations and Mises surrenders Then the problems such as the unstability of analysis workpiece, surrender, the technological parameters such as A, B, C, D, E, F, G, H, I are optimized, predict the generation of defect With analysis forming quality, in the subject matter that the design phase solves to exist, improve set forging forging quality, increase economic efficiency.
7) on the premise of ensureing that forging is molded, stock utilization improves more than 10%;
8) efficiency improves more than 45%.
Brief description of the drawings
Fig. 1 is the profile of out star wheel used for vehicle transmission shaft.
Fig. 2 is the front view of out star wheel used for vehicle transmission shaft corresponding with Fig. 1.
Fig. 3 is the profile of interior star-wheel used for vehicle transmission shaft, is coordinated by hoodle between interior star-wheel and profile wheel, from And synchronous axial system can be realized.
Fig. 4 is the mould structure schematic diagram of forging equipment or finish-forging manufacturing apparatus.
Fig. 5 is the set forging pre- heat forging drawing of inside and outside forging.
Fig. 6 is the inside and outside forging finish-forging heat forging drawing of set forging.
Fig. 7 is the schematic diagram of the set forging upper and lower core rod of blocker.
Fig. 8 is the schematic diagram of the set forging upper and lower core rod of finisher.
Fig. 9 is the structural representation of die cut equipment.
In figure, 1. die shoe, 2. punch holder left and right adjusting bolt, 3. left support plate, 4. heavily loaded Rectangular Spring, 5. spring lead Xiang Zhu, 6. trim die left and right adjusting bolt, 7. trim die regulating bolt fixed frame, 8. stripper, 9. discharging flat spring, 10. upper bolster, 11. punching trimming punch die shank steady pins, 12. punching trimming punch die shanks, punching forgings trimmings in 13. sets of forgings Drift, 14. sets of inside and outside forging of forging, punching forgings drift in 15. sets of forgings compresses model cavity, 17. trimmings in 16. sets of forgings under forging Cavity plate forward-backward adjustment bolts, punching forgings trim die in 18. sets of forgings, 19. times pressure dies, 20. times pressure die fixed plate is oriented to Block, 21. times pressure die fixed plates, 22. right support plates, 23. pierce punch fixed seats, 24. regulating bolt fastening nuts, 25. punchings Headstock forward-backward adjustment bolts, 26. punch holder forward-backward adjustment bolts supporting plates.
Specific embodiment
The present invention is further described with specific embodiment below in conjunction with the accompanying drawings.
Embodiment one:
Referring to Fig. 4-9, a kind of out star wheel used for vehicle transmission shaft, interior star-wheel blank contour forging technique are comprised the following steps:S1、 Pre-forging:It is shaped as what out star wheel blank and interior star-wheel blank were connected as a single entity between the upper mold core and lower mold core of pre-forging mould Structure, wherein out star wheel blank bottom are connected as a single entity with the top of interior star-wheel blank;S2, finish-forging are made:The base completed to pre-forging Part further carries out forging forming;S3, punching press segmentation:The interior star-wheel blank of the blank after finish-forging is made by the way of the punching press and Out star wheel blank is separated.
Referring to Fig. 5-6, when finish-forging is made:The height of inside and outside star-wheel blank connecting portion is A, and interior out star wheel connecting portion is extremely The distance of interior star-wheel upper end is B, and the width of interior out star wheel connecting portion is C, and the height of out star wheel is F, and the height of interior star-wheel is H;During pre-forging:The height of inside and outside star-wheel blank connecting portion is D, the distance of interior out star wheel connecting portion to interior star-wheel upper end It is E, the height of out star wheel is G, and the height of interior star-wheel is I;Then:A=3-4mm, B=0-5mm, C=0.5-0.8mm, D=A+ 1mm, E=B, G=F+1mm, I=H+0.5mm.
Referring to Fig. 9, when the punching press is split, interior out star wheel connecting portion uses direct punching trimming.
Embodiment two:
A kind of above-mentioned out star wheel used for vehicle transmission shaft, the equipment of interior star-wheel blank contour forging technique, including blocking manufacturing apparatus, Finish-forging manufacturing apparatus, die cut equipment;Spatial form between the upper mold core and lower mold core of the blocking manufacturing apparatus is out star wheel The pre-forging structure that blank is connected as a single entity with interior star-wheel blank, wherein out star wheel blank bottom are linked as with the top of interior star-wheel blank Integrally;Spatial form between the upper mold core and lower mold core of the finish-forging manufacturing apparatus is linked as out star wheel blank with interior star-wheel blank The whole forging structure of one;The die cut equipment includes that punching forgings trimming is rushed in the set forging for be fixed on the lower section of upper bolster 10 First 13, stripper 8;The stripper 8 is connected by elastic mechanism with upper bolster 10, and with blank out star wheel blank portion to be forged Divide top corresponding;Punching forgings trimming punch 13 is fixedly connected with upper bolster 10 in the set forging, and with blank to be forged in Star-wheel blank portions top is corresponding.
Referring to Fig. 9, the external diameter of punching forgings trimming punch 13 is slightly less than the out star wheel blank portions in the set forging Minimum diameter.
Referring to Fig. 5-6, the die cavity of finish-forging manufacturing apparatus:The height of inside and outside star-wheel blank connecting portion is A, and interior out star wheel connects The distance of socket part position to interior star-wheel upper end is B, and the width of interior out star wheel connecting portion is C, and the height of out star wheel is F, interior star-wheel Height be H;The die cavity of blocking manufacturing apparatus:The height of inside and outside star-wheel blank connecting portion is D, and interior out star wheel connecting portion is extremely The distance of interior star-wheel upper end is E, and the height of out star wheel is G, and the height of interior star-wheel is I;Then:A=3-4mm, B=0-5mm, C= 0.5-0.8mm, D=(A+1) mm, E=B, G=(F+1) mm, I=(H+0.5) mm.
This programme is based on set forging die forging process of the Deform simulations from blank to forging and shapes process, observes and summarizes Law of metal flow, load and energy needed for obtaining stress field, strain field, deformation, provides blank geometric form in forming process The change of shape, size and performance.With reference to the actual feasibility for inquiring into set forging, by the result being simulated to different technical parameters With the Comparative result checking of experiment, optimum process scheme is made.Hookean region uses Hook laws, plastic region to use Prandt l-Reuss constitutive equations and Mises yield criterions analysis workpiece unstability, surrender the problems such as, optimize A, B, C, D, The technological parameters such as E, F, G, H, I, predict generation and the analysis forming quality of defect, and solving the main of presence in the design phase asks Topic, improves set forging forging quality, increases economic efficiency.
Above is the preferred embodiments of the present invention, those of ordinary skill in the art can on this basis carry out various conversion Or improve, on the premise of the total design of the present invention is not departed from, these conversion or improvement should all belong to claimed Within the scope of.

Claims (7)

1. a kind of out star wheel used for vehicle transmission shaft, interior star-wheel blank contour forging technique, it is characterised in that comprise the following steps:
S1, pre-forging:The out star wheel blank that is shaped as between the upper mold core and lower mold core of pre-forging mould connects with interior star-wheel blank The structure being integrated, wherein out star wheel blank bottom are connected as a single entity with the top of interior star-wheel blank;
S2, finish-forging are made:Forging forming is further carried out to the blank that pre-forging is completed;
S3, punching press segmentation:The interior star-wheel blank and out star wheel blank of the blank after finish-forging is made by the way of the punching press are separated Come.
2. as claimed in claim 1 out star wheel used for vehicle transmission shaft, interior star-wheel blank contour forging technique, it is characterised in that:
When finish-forging is made:The height of inside and outside star-wheel blank connecting portion be A, interior out star wheel connecting portion to interior star-wheel upper end away from From being B, the width of interior out star wheel connecting portion is C, and the height of out star wheel is F, and the height of interior star-wheel is H;
During pre-forging:The height of inside and outside star-wheel blank connecting portion be D, interior out star wheel connecting portion to interior star-wheel upper end away from From being E, the height of out star wheel is G, and the height of interior star-wheel is I;
Then:A=3-4mm, B=0-5mm, C=0.5-0.8mm, D=(A+1) mm, E=B, G=(F+1) mm, I=(H+0.5) mm。
3. as claimed in claim 2 out star wheel used for vehicle transmission shaft, interior star-wheel blank contour forging technique, it is characterised in that:It is described When punching press is split, interior out star wheel connecting portion uses direct punching trimming.
4. out star wheel used for vehicle transmission shaft described in a kind of claim 1, the equipment of interior star-wheel blank contour forging technique, its feature exist In:
Including blocking manufacturing apparatus, finish-forging manufacturing apparatus, die cut equipment;
Spatial form between the upper mold core and lower mold core of the blocking manufacturing apparatus is linked as out star wheel blank with interior star-wheel blank The pre-forging structure of one, wherein out star wheel blank bottom are connected as a single entity with the top of interior star-wheel blank;
Spatial form between the upper mold core and lower mold core of the finish-forging manufacturing apparatus is linked as out star wheel blank with interior star-wheel blank The whole forging structure of one;
The die cut equipment includes being fixed on set forging interior punching forgings trimming punch (13), the discharging below upper bolster (10) Plate (8);
The stripper (8) is connected by elastic mechanism with upper bolster (10), and with blank out star wheel blank portions to be forged on Portion is corresponding;
It is described set forging in punching forgings trimming punch (13) be fixedly connected with upper bolster (10), and with star-wheel base in blank to be forged Part part top is corresponding.
5. as claimed in claim 4 out star wheel used for vehicle transmission shaft, the equipment of interior star-wheel blank contour forging technique, its feature exist In:The external diameter of punching forgings trimming punch (13) is slightly less than the minimum diameter of the out star wheel blank portions in the set forging.
6. as claimed in claim 4 out star wheel used for vehicle transmission shaft, the equipment of interior star-wheel blank contour forging technique, its feature exist In:
The die cavity of finish-forging manufacturing apparatus:The height of inside and outside star-wheel blank connecting portion is A, interior out star wheel connecting portion to interior star-wheel The distance of upper end is B, and the width of interior out star wheel connecting portion is C, and the height of out star wheel is F, and the height of interior star-wheel is H;
The die cavity of blocking manufacturing apparatus:The height of inside and outside star-wheel blank connecting portion is D, interior out star wheel connecting portion to interior star-wheel The distance of upper end is E, and the height of out star wheel is G, and the height of interior star-wheel is I;
Then:A=3-4mm, B=0-5mm, C=0.5-0.8mm, D=(A+1) mm, E=B, G=(F+1) mm, I=(H+0.5) mm。
7. as claimed in claim 4 out star wheel used for vehicle transmission shaft, the equipment of interior star-wheel blank contour forging technique, its feature exist In:Blocking manufacturing apparatus, finish-forging manufacturing apparatus are two halves formula package assembly.
CN201710092512.9A 2017-02-21 2017-02-21 die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft Active CN106694789B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710092512.9A CN106694789B (en) 2017-02-21 2017-02-21 die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft

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Application Number Priority Date Filing Date Title
CN201710092512.9A CN106694789B (en) 2017-02-21 2017-02-21 die forging process and device for blank of outer star wheel and inner star wheel for automobile transmission shaft

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CN106694789B CN106694789B (en) 2019-12-10

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110238336A (en) * 2019-07-24 2019-09-17 泰州浙华机械精锻有限公司 A kind of high-precision forging closing forging technology
CN111451436A (en) * 2020-05-13 2020-07-28 上海长特锻造有限公司 Forging process of high-strength internal star wheel

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Publication number Priority date Publication date Assignee Title
JP2008173661A (en) * 2007-01-17 2008-07-31 Ntn Corp Die device for manufacturing hub ring, and method for manufacturing hub ring
CN201720382U (en) * 2010-07-26 2011-01-26 上海爱知锻造有限公司 Mold cavity for forging inner and outer star wheels
CN103419003A (en) * 2013-09-18 2013-12-04 浙江向隆机械有限公司 Constant speed drive shaft ball case processing technology
CN104494067A (en) * 2014-12-24 2015-04-08 天津市久跃科技有限公司 Injection part sprue flash cutting device
CN104889300A (en) * 2015-06-12 2015-09-09 南京国际船舶设备配件有限公司 Closed die forging die for valve seat of diesel engine and processing technique of die
CN206550284U (en) * 2017-02-21 2017-10-13 上海交大中京锻压有限公司 Out star wheel used for vehicle transmission shaft, interior star-wheel blank forging equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008173661A (en) * 2007-01-17 2008-07-31 Ntn Corp Die device for manufacturing hub ring, and method for manufacturing hub ring
CN201720382U (en) * 2010-07-26 2011-01-26 上海爱知锻造有限公司 Mold cavity for forging inner and outer star wheels
CN103419003A (en) * 2013-09-18 2013-12-04 浙江向隆机械有限公司 Constant speed drive shaft ball case processing technology
CN104494067A (en) * 2014-12-24 2015-04-08 天津市久跃科技有限公司 Injection part sprue flash cutting device
CN104889300A (en) * 2015-06-12 2015-09-09 南京国际船舶设备配件有限公司 Closed die forging die for valve seat of diesel engine and processing technique of die
CN206550284U (en) * 2017-02-21 2017-10-13 上海交大中京锻压有限公司 Out star wheel used for vehicle transmission shaft, interior star-wheel blank forging equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110238336A (en) * 2019-07-24 2019-09-17 泰州浙华机械精锻有限公司 A kind of high-precision forging closing forging technology
CN111451436A (en) * 2020-05-13 2020-07-28 上海长特锻造有限公司 Forging process of high-strength internal star wheel

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Address after: No. 508, Yong Yong Road, Qing Cun town, Fengxian District, Shanghai

Applicant after: Shanghai JD Chukyo Forging & Stamping Co., Ltd.

Applicant after: Jiangsu Nanyang Zhongjing science and Technology Co., Ltd.

Address before: No. 508, Yong Yong Road, Qing Cun town, Fengxian District, Shanghai

Applicant before: Shanghai JD Chukyo Forging & Stamping Co., Ltd.

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