CN101549380A - Resilience control method for moulding top surface of car roof - Google Patents
Resilience control method for moulding top surface of car roof Download PDFInfo
- Publication number
- CN101549380A CN101549380A CNA2008100355747A CN200810035574A CN101549380A CN 101549380 A CN101549380 A CN 101549380A CN A2008100355747 A CNA2008100355747 A CN A2008100355747A CN 200810035574 A CN200810035574 A CN 200810035574A CN 101549380 A CN101549380 A CN 101549380A
- Authority
- CN
- China
- Prior art keywords
- roof
- profile
- workpiece
- skylight
- resilience
- 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
Landscapes
- Punching Or Piercing (AREA)
Abstract
The invention relates to a resilience control method for the moulding top surface of a car roof. The method is used in the process of punching and forming a set of moulds of a full car roof and a skylight car roof, and includes the step of respectively punching a full car roof workpiece and a skylight car roof workpiece by selecting the common mould by N steps of working procedures, N is an integer larger than zero, the moulding surface of a mould core of the common mould is a first compensation moulding surface, and the shape of the first compensation moulding surface is identical with the shape of a punched moulding surface in any working procedure in the N steps of working procedures of punching the full car roof workpiece and the skylight car roof workpiece before resilience; and after the N steps of punching working procedures are accomplished, at least one mould core and one stripper plate of the mould are replaced, a new mould core and a new stripper plate are used for punching the skylight car roof workpiece by M steps of working procedures after replacement, M is an integer larger than zero, and the resilience volume of the skylight car roof workpiece is different from the resilience volume in the N steps of punching working procedures.
Description
Technical field
The present invention relates to a kind of method for controlling springback of in Sheet Metal Forming Technology, expiring the top profile of roof or band skylight roof.
Background technology
Resilience is to cause one of key factor of car covering dimension overproof, and its principle is the sprung back of sheet material.At present, for the processing of outer covering piece resilience problem, mainly rely on after the die trial, stamping parts and cubing are compared measurement, die face is revised, stamping parts is just crossed be shaped according to deviation, utilize rebound law, the shape after its unloading is conformed to intended shape or close.In other words, if directly making die face according to product data is the part that can not get meeting tolerance, must on the basis of product data, compensate die face, to optimize die face, make part break away from behind the mould generation resilience size near product data and satisfy tolerance.
For roof, its resilience mainly be reflected in vehicle body Z to.The rebound law of full roof and band skylight roof is different, and difference is very big.If adopt two molds to make respectively to full roof and band skylight roof,, generally can not do like this because manufacturing cost is too high.But when the mould that only uses a cover through the profile correction comes these two kinds of parts of punching press, be difficult to effectively take into account the control of two kinds of accessory sizes.
A kind of method of utilizing the roof mould to make roof comprises 5 procedures, is respectively: operation 1, and utilize stretching die that workpiece is stretched; Operation 2 utilizes edger to cut edge to around the workpiece; Operation 3 utilizes first flange die to carrying out flange around the workpiece; Operation 4 utilizes flange die that the workpiece both sides are carried out flange once more; Operation 5 utilizes flange die that the front and back of workpiece are carried out flange once more, perhaps utilizes flange die that the front and back of workpiece are carried out flange once more and the skylight hole of this workpiece is carried out flange.In the method, not being both of the springback capacity of full roof and band skylight roof causes in operation 5.
Summary of the invention
The object of the present invention is to provide a kind of resilience control method for moulding top surface of car roof, this method makes full roof and the band skylight roof can a shared mold in stamping forming process and can take into account the control of these two kinds of stamping parts sizes.
In order to realize described purpose, resilience control method for moulding top surface of car roof of the present invention, be used for full roof workpiece of punching press and punching press band skylight roof workpiece to make the manufacture process of full roof and band skylight roof, be characterized in, select the shared mould of a cover that full roof workpiece and band skylight roof workpiece are carried out N road stamping procedure respectively, N is the integer greater than zero, at this moment, this profile of overlapping the core rod of shared mould is the first compensation profile, and shape of this first compensation profile is that the profile shape that is stamped in the arbitrary operation in described N road stamping procedure with full roof workpiece or band skylight roof workpiece before back and the resilience is identical; After described N road stamping procedure, at least one core rod and stripper to this mold are changed, continue band skylight roof workpiece is carried out M road stamping procedure with core rod after changing and stripper, M is the integer greater than zero, in described M road stamping procedure, the springback capacity of band skylight roof workpiece is inequality with the springback capacity in described N road stamping procedure.
In the profile control method of described roof top, full roof and band skylight roof identical situation of springback capacity in described N procedure have been taken into full account, the shared mold of Sheet Metal Forming Technology of full roof and band skylight roof in described N procedure with same compensation profile, and only in last M procedure, correspondingly this part core rod and stripper that overlaps shared mould is switched, with stamping procedure with the skylight roof, thereby in manufacture process, full roof and band skylight roof are under the prerequisite of a shared mold, only to wherein together or the core rod and the stripper of several roads mould switch, just effectively taken into account the dimensional requirement of two states roof.Reduced manufacturing cost.And the profile of the core rod of shared mould had just been considered the bounce situations of roof owing to adopted the compensation profile before punching press, had avoided also will handling resilience problem cost extensive work as the conventional method that relies on die trial after punching press.
Described resilience control method for moulding top surface of car roof, its further characteristics are, the profile of the core rod after the described replacing is the second compensation profile, be stamped afterwards in the shape of this second compensation profile and band arbitrary operation of skylight roof workpiece in described M road stamping procedure and the profile shape before the resilience identical.The profile of the model of additional mould adopts the compensation profile, thereby has reduced the workload of handling the resilience problem after punching press.
Described resilience control method for moulding top surface of car roof, the further characteristics of its feature are, described N road stamping procedure comprises full roof workpiece or is with skylight roof workpiece to carry out pull and stretch, to cut edge around the full roof workpiece or to around the roof workpiece of band skylight and skylight hole partly cut edge, to carrying out flange around the full roof workpiece and, flange once more being carried out in the both sides of full roof workpiece or band skylight roof workpiece to carrying out flange around the roof workpiece of band skylight and skylight hole partly being cut edge once more.In stamping procedures such as described pull and stretch, side cut, flange, full roof and to be with the springback capacity of skylight roof be identical or approaching, thus these procedure arrangements are become continuous operation, and in these operations shared mould, reduce the number of times that switches core rod and stripper, thereby reduce manufacturing cost.
Described resilience control method for moulding top surface of car roof, its further characteristics be, described M road stamping procedure comprises the forward and backward part of band skylight roof workpiece is carried out flange and the skylight hole of band skylight roof workpiece is partly carried out flange.Because behind the skylight hole part flange to band skylight roof workpiece, the springback capacity of band skylight roof workpiece and full roof workpiece is with inconsistent, so the overturning process of skylight hole part flange that will band skylight roof is arranged in described N procedure afterwards rather than be arranged between the described N procedure, switch the number of times of core rod and stripper with minimizing, thereby reduce manufacturing cost.
Described resilience control method for moulding top surface of car roof, its further characteristics are behind described N procedure, also the forward and backward part of full roof workpiece to be carried out flange.Because behind the skylight hole part flange to band skylight roof workpiece, the springback capacity of band skylight roof workpiece and full roof workpiece is with inconsistent, also be arranged in after the described N procedure so will expire the overturning process once more of roof, to reduce the number of times that switches core rod and stripper, to reduce manufacturing cost.
Described resilience control method for moulding top surface of car roof, its further characteristics are that the shape of the first compensation profile is to obtain in accordance with the following methods: the border of the top profile of fixing full roof; Move the top profile of full roof in the other direction according to the rebound law of full roof along the resilience of full roof, move to predetermined distance up to the resilience extreme point of the top profile of full roof, the top profile that expires roof this moment is the first compensation profile.According to such method, can before punching press, just can calculate the data of the first compensation profile according to the sized data of full roof.
Described resilience control method for moulding top surface of car roof, its further characteristics are that the shape of the first compensation profile or the second compensation profile is to obtain in accordance with the following methods: the border of the top profile of fixed band skylight roof; Along the top profile of the resilience opposite direction of being with the skylight roof according to the rebound law moving belt skylight roof of band skylight roof, resilience extreme point up to the top profile of being with the skylight roof moves to first preset distance, this moment, the top profile with the skylight roof was the first compensation profile, perhaps move to second preset distance, this moment, the top profile with the skylight roof was the second compensation profile.According to such method, can before punching press, just can calculate the data of the first compensation profile or the second compensation profile according to the sized data of band skylight roof.
Resilience control method for moulding top surface of car roof according to a further aspect in the invention, be used for punching press roof stamping parts to make the manufacture process of roof, be characterized in: select a mold that the roof stamping parts is carried out at least one punching press program, the profile of the core rod of this mold is the compensation profile, be stamped in the shape of this compensation profile and arbitrary operation of roof stamping parts in described stamping procedure afterwards and the shape of the profile before the resilience identical.Because the profile of the core rod of mould has adopted the compensation profile, has just considered the bounce situations of roof before punching press, avoided after punching press, as the conventional method that relies on die trial, also will handling to resilience problem cost extensive work.
Described resilience control method for moulding top surface of car roof, its further characteristics are that the shape of this compensation profile is to obtain in accordance with the following methods: the fixing border of the top profile of roof; Move the top profile of roof in the other direction according to the rebound law of roof along the resilience of roof, move to predetermined distance up to the resilience extreme point of the top of roof profile, this moment roof the shape that is shaped as this compensation profile of top profile.According to such method, can before punching press, just can calculate the data of compensation profile according to the sized data of roof.
Aforementioned purpose of the present invention, technical scheme and advantage will be described in detail in the following specific embodiment.
The specific embodiment
In a preferred embodiment of the present invention, resilience control method for moulding top surface of car roof is used in the described method of utilizing full roof of roof mould manufacturing and band skylight roof of background technology.At first, this method of utilizing the roof mould to make roof still comprises successively: operation 1, and utilize stretching die that full roof workpiece or band skylight roof workpiece are stretched; Operation 2 utilizes edger to cutting edge around full roof workpiece or the band skylight roof workpiece; Operation 3 utilizes flange die to carrying out flange around full roof workpiece or the band skylight roof workpiece; Operation 4 utilizes flange die that full roof workpiece or band roof workpiece both sides, skylight are carried out flange once more; Operation 5 utilizes flange die that the front and back of full roof workpiece are carried out flange once more, perhaps utilizes flange die that the front and back of the roof in band skylight are carried out flange once more and skylight hole is carried out flange.
Carry out the validity of springback compensation for the shared mold of manufacturing of taking into account full roof and band skylight roof, in the present embodiment, operation 1 adopts the shared mould with first compensation profile to operation 4, in operation 5, continue to adopt mould that flange is once more carried out in the front and back of full roof workpiece, to finish the punch forming process of full roof with first compensation profile; In addition, switch a cover core rod and a stripper of this mold, core rod after this replacing has the second compensation profile, and adopt core rod to being with the flange of skylight roof workpiece with second compensation profile, thereby can realize effective control, and simple in structure, replacing convenience to band skylight roof workpiece and size thereof.The shape of the described first compensation profile is identical with full roof workpiece or the band skylight roof workpiece profile shape before operation 1 is stamped back and resilience to arbitrary operation of operation 4.The shape of the described second compensation profile is identical with the profile shape that band skylight roof workpiece operation 5 is stamped afterwards and resilience is preceding.
Be appreciated that from the foregoing description,, then will increase, thereby can increase manufacturing cost the core rod of shared mould and the switching times of stripper if operation 5 is arranged on operation 1 between the operation 4.So preferably can use the operation of mould to be arranged to continuous operation jointly all, with the core rod that reduces shared mould and the switching times of stripper.
Provide a kind of embodiment that obtains the first compensation profile or the second compensation profile below.
At first, use finite element software that the drawing overall process of full roof or band skylight roof is simulated, obtain the springback capacity of full roof workpiece or band skylight roof, and find out the place of rebound value maximum
Be referred to as the resilience extreme point, then, being that restrained boundary is fixed around the top profile of full roof workpiece or band skylight roof, make the resilience extreme point move in the other direction and transform roof top profile, obtain the compensation profile of first behind the springback compensation or the second compensation profile along resilience.
Though the present invention discloses as above with preferred embodiment, yet it is not in order to limiting the present invention, anyly is familiar with one of ordinary skill in the art, without departing from the spirit and scope of the present invention, should make the variation or the replacement of all equivalences.Therefore, protection scope of the present invention is as the criterion when looking accompanying the scope that the application's claim defined.
Claims (9)
1. a resilience control method for moulding top surface of car roof is used for full roof workpiece of punching press and punching press band skylight roof workpiece to make the manufacture process of full roof and band skylight roof, it is characterized in that,
Select the shared mould of a cover that full roof workpiece and band skylight roof workpiece are carried out N road stamping procedure respectively, N is the integer greater than zero, at this moment, this profile of overlapping the core rod of shared mould is the first compensation profile, and shape of this first compensation profile is that the profile shape that is stamped in the arbitrary operation in described N road stamping procedure with full roof workpiece or band skylight roof workpiece before back and the resilience is identical;
After described N road stamping procedure, at least one core rod and stripper to this mold are changed, continue band skylight roof workpiece is carried out M road stamping procedure with core rod after changing and stripper, M is the integer greater than zero, in described M road stamping procedure, the springback capacity of band skylight roof workpiece is inequality with the springback capacity in described N road stamping procedure.
2. resilience control method for moulding top surface of car roof according to claim 1, it is characterized in that, the profile of the core rod after the described replacing is the second compensation profile, be stamped afterwards in the shape of this second compensation profile and band arbitrary operation of skylight roof workpiece in described M road stamping procedure and the profile shape before the resilience identical.
3. resilience control method for moulding top surface of car roof according to claim 1 and 2, it is characterized in that, described N road stamping procedure comprises full roof workpiece or is with skylight roof workpiece to carry out pull and stretch, to cut edge around the full roof workpiece or to around the roof workpiece of band skylight and skylight hole partly cut edge, to carrying out flange around the full roof workpiece and, flange once more being carried out in the both sides of full roof workpiece or band skylight roof workpiece to carrying out flange around the roof workpiece of band skylight and skylight hole partly being cut edge once more.
4. resilience control method for moulding top surface of car roof according to claim 3 is characterized in that, described M road stamping procedure comprises the forward and backward part of band skylight roof workpiece is carried out flange and the skylight hole of band band skylight roof workpiece is partly carried out flange.
5. resilience control method for moulding top surface of car roof according to claim 4 is characterized in that, behind described N procedure, also the forward and backward part of full roof workpiece is carried out flange.
6. resilience control method for moulding top surface of car roof according to claim 1 is characterized in that, the shape of the first compensation profile is to obtain in accordance with the following methods:
The border of the top profile of fixing full roof;
Move the top profile of full roof in the other direction according to the rebound law of full roof along the resilience of full roof, move to predetermined distance up to the resilience extreme point of the top profile of full roof, the top profile that expires roof this moment is the first compensation profile.
7. resilience control method for moulding top surface of car roof according to claim 1 and 2 is characterized in that, the shape of the first compensation profile or the second compensation profile is to obtain in accordance with the following methods:
The border of the top profile of fixed band skylight roof;
Along the top profile of the resilience opposite direction of being with the skylight roof according to the rebound law moving belt skylight roof of band skylight roof, resilience extreme point up to the top profile of being with the skylight roof moves to first preset distance, this moment, the top profile with the skylight roof was the first compensation profile, perhaps move to second preset distance, this moment, the top profile with the skylight roof was the second compensation profile.
8. a resilience control method for moulding top surface of car roof is used for punching press roof stamping parts to make the manufacture process of roof, it is characterized in that,
Select a mold that the roof stamping parts is carried out at least one punching press program, the profile of the core rod of this mold is the compensation profile, be stamped in the shape of this compensation profile and arbitrary operation of roof stamping parts in described stamping procedure afterwards and the shape of the profile before the resilience identical.
9. resilience control method for moulding top surface of car roof according to Claim 8 is characterized in that the shape of this compensation profile is to obtain in accordance with the following methods:
The fixing border of the top profile of roof;
Move the top profile of roof in the other direction according to the rebound law of roof along the resilience of roof, move to predetermined distance up to the resilience extreme point of the top of roof profile, this moment roof the shape that is shaped as this compensation profile of top profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810035574 CN101549380B (en) | 2008-04-03 | 2008-04-03 | Resilience control method for moulding top surface of car roof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810035574 CN101549380B (en) | 2008-04-03 | 2008-04-03 | Resilience control method for moulding top surface of car roof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101549380A true CN101549380A (en) | 2009-10-07 |
| CN101549380B CN101549380B (en) | 2011-02-09 |
Family
ID=41154001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810035574 Active CN101549380B (en) | 2008-04-03 | 2008-04-03 | Resilience control method for moulding top surface of car roof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101549380B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974688A (en) * | 2011-09-05 | 2013-03-20 | 北汽福田汽车股份有限公司 | Longitudinal member female die and longitudinal member manufacturing method |
| CN103212625A (en) * | 2013-05-10 | 2013-07-24 | 奇瑞汽车股份有限公司 | Stamping technology treatment method of skylight on automobile top cover |
| CN103448631A (en) * | 2013-08-22 | 2013-12-18 | 烟台正海汽车内饰件有限公司 | Molding process for ceiling of complex shape |
| CN104588481A (en) * | 2014-12-24 | 2015-05-06 | 东莞市中电爱华电子有限公司 | Sheet press riveting material swelling compensation method and convex numerical control tool |
| CN105478621A (en) * | 2015-12-17 | 2016-04-13 | 武汉城市职业学院 | Stamping method for automobile covering part |
| CN106040881A (en) * | 2015-04-07 | 2016-10-26 | 丰田自动车株式会社 | Caulking method |
| CN109127945A (en) * | 2018-08-01 | 2019-01-04 | 武汉理工大学 | The regulation method of the stamping precision of lightweight body outer skin |
| CN110293171A (en) * | 2019-06-15 | 2019-10-01 | 柳州职业技术学院 | The Sheet Metal Forming Technology type face compensation method of automobile top cover with skylight |
| CN114192640A (en) * | 2021-11-04 | 2022-03-18 | 中国第一汽车股份有限公司 | Manufacturing method of roof skylight |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062200C (en) * | 1997-08-08 | 2001-02-21 | 周兴平 | Two-step rings billet punching formation and composite die used therein |
| US7194388B2 (en) * | 2002-03-25 | 2007-03-20 | Alcoa Inc. | Method for determining a die profile for forming a metal part having a desired shape and associated methods |
| CN2649213Y (en) * | 2003-09-23 | 2004-10-20 | 河南新飞电器有限公司 | Bending die |
-
2008
- 2008-04-03 CN CN 200810035574 patent/CN101549380B/en active Active
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974688B (en) * | 2011-09-05 | 2014-12-03 | 北汽福田汽车股份有限公司 | Longitudinal member female die and longitudinal member manufacturing method |
| CN102974688A (en) * | 2011-09-05 | 2013-03-20 | 北汽福田汽车股份有限公司 | Longitudinal member female die and longitudinal member manufacturing method |
| CN103212625A (en) * | 2013-05-10 | 2013-07-24 | 奇瑞汽车股份有限公司 | Stamping technology treatment method of skylight on automobile top cover |
| CN103448631A (en) * | 2013-08-22 | 2013-12-18 | 烟台正海汽车内饰件有限公司 | Molding process for ceiling of complex shape |
| CN104588481A (en) * | 2014-12-24 | 2015-05-06 | 东莞市中电爱华电子有限公司 | Sheet press riveting material swelling compensation method and convex numerical control tool |
| CN104588481B (en) * | 2014-12-24 | 2017-01-18 | 东莞市中电爱华电子有限公司 | Sheet press riveting material swelling compensation method and convex numerical control tool |
| CN106040881B (en) * | 2015-04-07 | 2018-05-29 | 丰田自动车株式会社 | Clinching method |
| US10058960B2 (en) | 2015-04-07 | 2018-08-28 | Toyota Jidosha Kabushiki Kaisha | Caulking method |
| CN106040881A (en) * | 2015-04-07 | 2016-10-26 | 丰田自动车株式会社 | Caulking method |
| CN105478621B (en) * | 2015-12-17 | 2017-06-27 | 武汉城市职业学院 | A kind of process for stamping of automobile panel |
| CN105478621A (en) * | 2015-12-17 | 2016-04-13 | 武汉城市职业学院 | Stamping method for automobile covering part |
| CN109127945A (en) * | 2018-08-01 | 2019-01-04 | 武汉理工大学 | The regulation method of the stamping precision of lightweight body outer skin |
| CN110293171A (en) * | 2019-06-15 | 2019-10-01 | 柳州职业技术学院 | The Sheet Metal Forming Technology type face compensation method of automobile top cover with skylight |
| CN110293171B (en) * | 2019-06-15 | 2020-11-27 | 柳州职业技术学院 | Stamping process profile compensation method for automobile roof with skylight |
| CN114192640A (en) * | 2021-11-04 | 2022-03-18 | 中国第一汽车股份有限公司 | Manufacturing method of roof skylight |
| CN114192640B (en) * | 2021-11-04 | 2024-06-04 | 中国第一汽车股份有限公司 | Manufacturing method of top cover skylight |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101549380B (en) | 2011-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101549380B (en) | Resilience control method for moulding top surface of car roof | |
| CA2695101A1 (en) | Reducing waste in metal stamping processes and systems therefor | |
| CN203887058U (en) | Trimming and flanging shaping die | |
| CN101209469A (en) | Method for forming part drawing modeling with dent structure | |
| CN106944794A (en) | A kind of auto parts and components production method | |
| CN102632143A (en) | Plate trimming scrap cutter | |
| CN207563548U (en) | It is a kind of can cutting edge piercing and flanging and shaping the progressive die | |
| CN203610527U (en) | Composite die capable of internally and externally cutting materials | |
| CN105251886B (en) | The progressive die decompressor and technique of automobile air conditioner parallel flow evaporator porous plate | |
| CN106903490A (en) | A kind of auto parts and components production method | |
| CN205270613U (en) | Mould in fender shaping special use | |
| CN100503076C (en) | Method for forming crossbeam workpiece | |
| CN107009098A (en) | A kind of preparation method and applications of automobile telecommunication sheet metal component | |
| CN208450356U (en) | For automobile rear longitudinal girder inner reinforcing elements mold | |
| CN207563550U (en) | A kind of multi-functional progressive die | |
| CN207508068U (en) | A kind of sheet metal shaving die | |
| CN205702076U (en) | A kind of box-like housing succeeding stretch mould | |
| CN205702075U (en) | A kind of housing secondary deep-drawing mould | |
| CN207344080U (en) | A kind of car electrics sheet metal component | |
| CN205270615U (en) | Special bed die of fender | |
| CN104353732B (en) | A kind of barrel-shaped part progressive die | |
| CN108188275A (en) | The forming method and its mold of rear suspension support for engine stabilizer blade | |
| CN213559391U (en) | Automobile body sheet metal part mould structure | |
| CN107639146A (en) | A kind of sheet metal shaving die | |
| CN206982086U (en) | A kind of automobile metal plate work |
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 | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Anting Jiading District Town, Shanghai City Road No. 123 in 201805 Patentee after: SAIC VOLKSWAGEN AUTOMOTIVE COMPANY LIMITED Address before: 201805 No. 63, Luopu Road, Shanghai, Anting Patentee before: Dazhang Automobile Co., Ltd., Shanghai |