CN107321838A - The Trimming Die that a kind of hard alloy is constituted with gray iron - Google Patents
The Trimming Die that a kind of hard alloy is constituted with gray iron Download PDFInfo
- Publication number
- CN107321838A CN107321838A CN201610283653.4A CN201610283653A CN107321838A CN 107321838 A CN107321838 A CN 107321838A CN 201610283653 A CN201610283653 A CN 201610283653A CN 107321838 A CN107321838 A CN 107321838A
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- Prior art keywords
- hard alloy
- cutting edge
- constituted
- sides
- alloy blocks
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
- B26F2001/449—Cutters therefor; Dies therefor for shearing, e.g. with adjoining or abutting edges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
The present invention proposes the Trimming Die that a kind of hard alloy is constituted with gray iron, including the upper bolster and die shoe being oppositely arranged, dynamic cutting edge hard alloy blocks are provided with the upper bolster, it is provided with the die shoe and determines cutting edge hard alloy blocks, the dynamic cutting edge hard alloy blocks and the processing department for determining formation workpiece between cutting edge hard alloy blocks.So, processing department is formed by moving cutting edge hard alloy blocks and determining cutting edge hard alloy blocks, more than half can be reduced relative to traditional moulds material, and save the material of the parts such as screw hole lock, insert height can also be reduced, further, since the repair welding performance of hard alloy is good, repair welding relative to steel alloy is simpler, has very big cost advantage among follow-up sideline adjustment process.
Description
Technical field
The present invention relates to the Trimming Die that mould applications, more particularly to a kind of hard alloy are constituted with gray iron.
Background technology
Diel, be in Cold Press Working, by metal or process for un-metal material into part or semi-finished product one kind
Special process is equipped, and pressure is applied to material using the mould on forcing press, it is produced separation or is plastically deformed, from
And a kind of pressure processing method of part needed for obtaining.
It can be divided into according to technological property diel：(1) trimming die, produces material along closing or unlimited contour line and divides
From mould.(2) stretching die, is tabular blank is obtained by plastic deformation by the synergy of punch-pin, blank holder, cavity plate
The mould for the spatial form that must stablize.(3) finishing die, is that blank or semi worked pieces is directly multiple by the shape of figure punch and matrix
Shape is made, and material only produces the mould of local plastic deformation in itself.(4) flange mold, make plate blank or other blanks along
Straight line or flange line produce flexural deformation, so as to obtain the mould of certain angle and the workpiece of shape.
Wherein, trimming die is the mould for drawn component addendum and binder surface redundance to be cut away, according to
The direction of motion of deburring insert, can be divided into three major types：Vertical trimming mould, wedge trimming die and vertical wedge trimming die.Its work
Flow is：Upper mould is lock onto lathe top shoe, lower mould is anchored on platen, tensioning member is put in into lower mould, set
Rational mould punching parameter and punching press number of times.Upper die mechanism is moved downward, as sliding block is moved downward, and pressure core is first pressed against system
Part, sliding block continues to move downward, until upper and lower mould cutting edge, the interaction of drift and die case separate product, separation it is useless
Material and material beans are slid to workbench along the slideway or sliding plate set.
Because trimming die is to be separated product with die case interaction by upper and lower mould cutting edge, drift, so upper and lower mould
The setting of cutting edge is particularly significant, the deburring insert that existing upper and lower mould edge mouthful is used, and easily occurs deburring cutter block tipping, cutting edge
The problems such as gap increases, so that the workpiece processed has burr, deburring.
The content of the invention
The technical problem to be solved in the present invention is：The Trimming Die that a kind of hard alloy is constituted with gray iron is provided, it can subtract
The burr that few workpiece is produced, the problem of reduction deburring is deformed.
What the solution of the present invention was realized in：The Trimming Die that a kind of hard alloy is constituted with gray iron, including phase
To the upper bolster and die shoe of setting, wherein, it is provided with dynamic cutting edge hard alloy blocks, the die shoe and sets on the upper bolster
It is equipped with and determines cutting edge hard alloy blocks, the dynamic cutting edge hard alloy blocks and the processing for determining formation workpiece between cutting edge hard alloy blocks
Portion.
Another technical scheme of the present invention is on above-mentioned basis, is additionally provided with the upper bolster for binder
Pressing device.
Another technical scheme of the present invention is on above-mentioned basis, and elastic device, institute are provided with the pressing device
State and Limit screw is additionally provided with upper bolster, the Limit screw controls moving up and down for the pressing device.
Another technical scheme of the present invention is on above-mentioned basis, the dynamic cutting edge hard alloy blocks and the upper mould
Seat is structure as a whole.
Another technical scheme of the present invention is on above-mentioned basis, described to determine cutting edge hard alloy blocks and the lower mould
Seat is structure as a whole.
Another technical scheme of the present invention is on above-mentioned basis, it is characterised in that：The dynamic cutting edge hard alloy
Block is heptagon.
Another technical scheme of the present invention is that on above-mentioned basis the heptagonal A is adjacent while with B, the A
While and length during B is thickness of workpiece 20 to 30 times, the A while and angle during B be 75 ° -85 °, the B sides are set vertically
Put, the heptagonal C is adjacent while with B, the length on the C sides is 0.5 to 0.7 times of B edge lengths, the C while and during B
Angle is 95 ° -105 °, and the heptagonal D is adjacent while with A, and the length on the D sides is 0.5 to 0.7 times of A edge lengths, institute
State D while and angle during A be 100 ° -120 °, the heptagonal G when setting C between E sides, folders of G while with B
Angle is 45 °, and the heptagonal F is when setting D between E sides, and angles of F while with B is 45 °, the length on the E sides
For 0.5 times of A edge lengths.
Another technical scheme of the present invention is on above-mentioned basis, described to determine cutting edge hard alloy blocks to move with described
The corresponding heptagon of cutting edge hard alloy blocks, length of a for determining cutting edge hard alloy blocks while to e respectively with the dynamic sword
Equal lengths of mouth hard alloy blocks A while to E.
Another technical scheme of the present invention is that on above-mentioned basis a for determining cutting edge hard alloy blocks is while with b
Adjacent and be mutually perpendicular to, the b sides are vertically arranged, and c is adjacent while with b, the c while and angle during b be 95 ° -105 °, d sides
It is adjacent with a sides, the d while and angle during a be 100 ° -120 °, g when setting c between e sides, folders of g while with b
Angle is 45 °, and f is when setting d between e sides, and angles of f while with b is 45 °.
Another technical scheme of the present invention is that on above-mentioned basis the upper bolster and die shoe are by grey iron casting
Into.
The Trimming Die that hard alloy of the present invention is constituted with gray iron, including the upper bolster and lower mould being oppositely arranged
It is provided with to be provided with dynamic cutting edge hard alloy blocks, the die shoe on seat, the upper bolster and determines cutting edge hard alloy blocks, it is described
Dynamic cutting edge hard alloy blocks and the processing department for determining formation workpiece between cutting edge hard alloy blocks.The upper bolster and dynamic cutting edge hard
Alloy block is structure as a whole, and the die shoe is also structure as a whole with determining cutting edge hard alloy blocks, so, can not only eliminate
Die holder insert mounting surface, also eliminates processing and the set-up time of insert, and the overall structure of mould more simplifies, and carries significantly
The efficiency of design has been risen, has been conducive to the propulsion of standardization.The Trimming Die can also carry out overall processing by numerical control device,
Clearance between punch and die can be so effectively ensured, man-hour and press holding time of the pincers worker to gap is reduced.Meanwhile, processing department is by moving sword
Mouthful hard alloy blocks and determine cutting edge hard alloy blocks and formed, more than half can be reduced relative to traditional moulds material, and province
The material of the parts such as screw hole lock is removed, insert height can also be reduced, further, since the repair welding performance of hard alloy is good, relatively
It is simpler in the repair welding of steel alloy, there is very big cost advantage among follow-up sideline adjustment process.
Brief description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.
Fig. 1 is the structure chart for the Trimming Die that a kind of embodiment of this programme is related to；
Fig. 2 is the partial enlarged drawing of Trimming Die shown in Fig. 1；
Fig. 3 is the structure chart of the dynamic cutting edge hard alloy blocks in Trimming Die shown in Fig. 1；
Fig. 4 is the structure chart for determining cutting edge hard alloy blocks in Trimming Die shown in Fig. 1.
Wherein：
1 dynamic cutting edge hard alloy blocks 2 determine the die shoe of 3 upper bolster of cutting edge hard alloy blocks 4
The pressing device of 5 lathe sliding block, 6 machine tool mould mounting platform, 7 Limit screw 8
9 workpiece
Embodiment
The present invention will be described in detail below in conjunction with the accompanying drawings, and the description of this part is only exemplary and explanatory, should not
There is any restriction effect to protection scope of the present invention.In addition, description of the those skilled in the art according to this document, can be right
Feature in this document in embodiment and not in be the same as Example carries out respective combination.
The embodiment of the present invention is as follows, refers to shown in Fig. 1 to Fig. 4, the Trimming Die that a kind of hard alloy is constituted with gray iron,
Including the upper bolster 3 and die shoe 4 being oppositely arranged, the upper bolster 3 is connected with lathe sliding block 5, and the die shoe 4 is fixed in lathe
On mould installion platform 6, wherein, it is provided with dynamic cutting edge hard alloy blocks 1, the die shoe 4 and is provided with the upper bolster 3
Determine cutting edge hard alloy blocks 2, the dynamic cutting edge hard alloy blocks 1 and the processing for determining formation workpiece 9 between cutting edge hard alloy blocks 2
Portion.During work, it would be desirable to which the workpiece of deburring is put in processing department, set after rational mould punching parameter and punching press number of times, upper mould
Seat 3 is moved downward, and as lathe sliding block 5 is moved downward, pressing device 8 is first pressed against product, and upper bolster 3 continues to move downward, directly
To dynamic cutting edge hard alloy blocks 1 and determine cutting edge hard alloy blocks 2 and interact to separate product, deburring of the completion to workpiece adds
Work.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in figure 1, being also set up on the upper bolster 3
There is the pressing device 8 for binder.So, binder is carried out before cutting edge blank up and down by pressing device 8, workpiece string can be prevented
It is dynamic, reduce the generation of burr.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in figure 1, being provided with the pressing device 8
Be additionally provided with Limit screw 7 on elastic device, the upper bolster 3, the Limit screw 7 control the pressing device 8 on move down
It is dynamic.
On the basis of above-described embodiment, in another embodiment of the present invention, the dynamic cutting edge hard alloy blocks 1 with it is described on
Die holder 3 is structure as a whole.
On the basis of above-described embodiment, in another embodiment of the present invention, it is described determine cutting edge hard alloy blocks 2 with it is described under
Die holder 4 is structure as a whole.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in Figure 3, it is characterised in that：The dynamic sword
Mouth hard alloy blocks 1 are heptagon.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in figure 3, wherein, α is 5 ° -15 °, β is
5°-15°.The heptagonal A is adjacent while with B, the A while and length during B is thickness of workpiece 20 to 30 times, the A
While and angle during B be 75 ° -85 °, the B sides are vertically arranged, and the heptagonal C is adjacent while with B, the length on the C sides
For 0.5 to 0.7 times of B edge lengths, the C while and angle during B be 95 ° -105 °, the heptagonal D is adjacent while with A,
The length on the D sides is 0.5 to 0.7 times of A edge lengths, the D while and angle during A be 100 ° -120 °, it is described heptagonal
G while set C while E sides between, angles of G while with B is 45 °, the heptagonal F while setting D while E sides between,
Angles of F while with B is 45 °, and the length on the E sides is 0.5 times of A edge lengths.So, the dynamic cutting edge hard alloy
Block 1 is arranged to above-mentioned heptagon structure, its A while and length value during B can improve the intensity of insert cutting edge, heptagon structure
Angle design can make cutting edge less sharp, while blanking pressure can also be reduced, in addition, the afterbody design of the heptagon structure is improved
The feasibility of its processing, while the contact area of insert and die seat body can also be increased, improves the energy for the power that withstands shocks
Power.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in figure 4, described determine cutting edge hard alloy
Block 2 be and the corresponding heptagon of the dynamic cutting edge hard alloy blocks 1, length of a for determining cutting edge hard alloy blocks 2 while to e
The equal length of degree respectively with the dynamic cutting edge hard alloy blocks 1A while to E.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in figure 4, wherein, α is 5 ° -15 °.It is described
The a for determining cutting edge hard alloy blocks 2 is adjacent while with b and be mutually perpendicular to, and the b sides are vertically arranged, and c is adjacent while with b, the c
While and angle during b be 95 ° -105 °, d is adjacent while with a, the d while and angle during a be 100 ° -120 °, g is when setting c
Between e sides, angles of g while with b is 45 °, and f is when setting d between e sides, and angles of f while with b is
45°。
On the basis of above-described embodiment, in another embodiment of the present invention, the upper bolster 3 and die shoe 4 are by grey cast iron casting
Make and form.
The Trimming Die that hard alloy of the present invention is constituted with gray iron, including the upper bolster 3 and lower mould being oppositely arranged
It is provided with to be provided with dynamic cutting edge hard alloy blocks 1, the die shoe 4 on seat 4, the upper bolster 3 and determines cutting edge hard alloy blocks
2, the dynamic cutting edge hard alloy blocks 1 and determine to form the processing department of workpiece 9 between cutting edge hard alloy blocks 2.The upper bolster 3 with
Dynamic cutting edge hard alloy blocks 1 are structure as a whole, and the die shoe 4 is also structure as a whole with determining cutting edge hard alloy blocks 2, so,
Die holder insert mounting surface can be not only eliminated, processing and the set-up time of insert, and the overall structure of mould is also eliminated
More simplify, greatly improve the efficiency of design, be conducive to the propulsion of standardization.The Trimming Die can also be set by numerical control
It is standby to carry out overall processing, clearance between punch and die can be so effectively ensured, man-hour and press holding time of the pincers worker to gap is reduced.Together
When, processing department is formed by moving cutting edge hard alloy blocks 1 and determining cutting edge hard alloy blocks 2, not only with higher intensity, Er Qiexiang
More than half can be reduced for traditional moulds material, the material of the parts such as screw hole lock is saved, insert height can also be reduced,
Further, since the repair welding performance of hard alloy is good, the repair welding relative to steel alloy is simpler, is adjusted in follow-up sideline
Cheng Dangzhong has very big cost advantage.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. the Trimming Die that a kind of hard alloy is constituted with gray iron, including the upper bolster and die shoe being oppositely arranged, its feature exist
In：It is provided with to be provided with dynamic cutting edge hard alloy blocks, the die shoe on the upper bolster and determines cutting edge hard alloy blocks, it is described
Dynamic cutting edge hard alloy blocks and the processing department for determining formation workpiece between cutting edge hard alloy blocks.
2. the Trimming Die that hard alloy according to claim 1 is constituted with gray iron, it is characterised in that：On the upper bolster
It is additionally provided with the pressing device for binder.
3. the Trimming Die that hard alloy according to claim 2 is constituted with gray iron, it is characterised in that：On the pressing device
It is provided with elastic device, the upper bolster and is additionally provided with Limit screw, the Limit screw is controlled above and below the pressing device
It is mobile.
4. the Trimming Die that hard alloy according to claim 1 is constituted with gray iron, it is characterised in that：The dynamic cutting edge is hard
Matter alloy block is structure as a whole with the upper bolster.
5. the Trimming Die that hard alloy according to claim 1 is constituted with gray iron, it is characterised in that：It is described that to determine cutting edge hard
Matter alloy block is structure as a whole with the die shoe.
6. the Trimming Die that hard alloy according to any one of claim 1 to 5 is constituted with gray iron, it is characterised in that：
The dynamic cutting edge hard alloy blocks are heptagon.
7. the Trimming Die that hard alloy according to claim 6 is constituted with gray iron, it is characterised in that：It is described heptagonal
A is adjacent while with B, the A while and length during B is thickness of workpiece 20 to 30 times, the A while and angle during B be 75 °-
85 °, the B sides are vertically arranged, and the heptagonal C is adjacent while with B, and the length on the C sides is the 0.5 to 0.7 of B edge lengths
Times, the C while and angle during B be 95 ° -105 °, the heptagonal D is adjacent while with A, and the length on the D sides is the A length of sides
0.5 to 0.7 times of degree, the D while and angle during A be 100 ° -120 °, the heptagonal G when setting C between E sides,
Angles of G while with B is 45 °, and the heptagonal F is when setting D between E sides, and angles of F while with B is
45 °, the length on the E sides is 0.5 times of A edge lengths.
8. the Trimming Die that hard alloy according to claim 7 is constituted with gray iron, it is characterised in that：It is described that to determine cutting edge hard
Matter alloy block is heptagon corresponding with the dynamic cutting edge hard alloy blocks, and a for determining cutting edge hard alloy blocks is while to e
The equal length of length respectively with the dynamic cutting edge hard alloy blocks A while to E.
9. the Trimming Die that hard alloy according to claim 8 is constituted with gray iron, it is characterised in that：It is described that to determine cutting edge hard
The a of matter alloy block is adjacent while with b and is mutually perpendicular to, and the b sides are vertically arranged, and c is adjacent while with b, the c while and during b
Angle is 95 ° -105 °, and d is adjacent while with a, the d while and angle during a be 100 ° -120 °, g when setting c and e sides it
Between, angles of g while with b is 45 °, and f is when setting d between e sides, and angles of f while with b is 45 °.
10. the Trimming Die that hard alloy according to any one of claim 1 to 5 is constituted with gray iron, it is characterised in that：
The upper bolster and die shoe are formed by grey iron casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610283653.4A CN107321838B (en) | 2016-04-30 | 2016-04-30 | Trimming die composed of hard alloy and gray iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610283653.4A CN107321838B (en) | 2016-04-30 | 2016-04-30 | Trimming die composed of hard alloy and gray iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107321838A true CN107321838A (en) | 2017-11-07 |
| CN107321838B CN107321838B (en) | 2020-01-03 |
Family
ID=60192434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610283653.4A Active CN107321838B (en) | 2016-04-30 | 2016-04-30 | Trimming die composed of hard alloy and gray iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107321838B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202343719U (en) * | 2011-10-21 | 2012-07-25 | 海尔集团公司 | Pre-bending trimming mold |
| CN103121284A (en) * | 2011-11-20 | 2013-05-29 | 扬州光辉内燃机配件有限公司 | Air valve alloyed forming die |
| CN103394580A (en) * | 2013-07-25 | 2013-11-20 | 安徽江淮汽车股份有限公司 | Trimming insert with adjustable cutting edge |
| CN103978090A (en) * | 2014-05-19 | 2014-08-13 | 安徽大昌科技股份有限公司 | Trimming die of rear suspension mounting support |
| CN204276669U (en) * | 2014-11-14 | 2015-04-22 | 北汽福田汽车股份有限公司 | Trimming Die |
| CN104690147A (en) * | 2013-12-09 | 2015-06-10 | 四川成飞集成科技股份有限公司 | Waste-trimming upper die cutter |
| CN205702026U (en) * | 2016-04-30 | 2016-11-23 | 湖南湖大三佳车辆技术装备有限公司 | The Trimming Die that a kind of hard alloy forms with gray iron |
-
2016
- 2016-04-30 CN CN201610283653.4A patent/CN107321838B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202343719U (en) * | 2011-10-21 | 2012-07-25 | 海尔集团公司 | Pre-bending trimming mold |
| CN103121284A (en) * | 2011-11-20 | 2013-05-29 | 扬州光辉内燃机配件有限公司 | Air valve alloyed forming die |
| CN103394580A (en) * | 2013-07-25 | 2013-11-20 | 安徽江淮汽车股份有限公司 | Trimming insert with adjustable cutting edge |
| CN104690147A (en) * | 2013-12-09 | 2015-06-10 | 四川成飞集成科技股份有限公司 | Waste-trimming upper die cutter |
| CN103978090A (en) * | 2014-05-19 | 2014-08-13 | 安徽大昌科技股份有限公司 | Trimming die of rear suspension mounting support |
| CN204276669U (en) * | 2014-11-14 | 2015-04-22 | 北汽福田汽车股份有限公司 | Trimming Die |
| CN205702026U (en) * | 2016-04-30 | 2016-11-23 | 湖南湖大三佳车辆技术装备有限公司 | The Trimming Die that a kind of hard alloy forms with gray iron |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107321838B (en) | 2020-01-03 |
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Denomination of invention: A trimming die composed of cemented carbide and gray iron Effective date of registration: 20200825 Granted publication date: 20200103 Pledgee: Bank of Changsha Limited by Share Ltd. science and Technology Branch Pledgor: HUNAN HUDA SUNJOY VEHICLE TECHNOLOGY & EQUIPMENT Co.,Ltd. Registration number: Y2020980005324 |
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Date of cancellation: 20220906 Granted publication date: 20200103 Pledgee: Bank of Changsha Limited by Share Ltd. science and Technology Branch Pledgor: HUNAN HUDA SUNJOY VEHICLE TECHNOLOGY & EQUIPMENT Co.,Ltd. Registration number: Y2020980005324 |
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Denomination of invention: A trimming die composed of cemented carbide and gray iron Effective date of registration: 20220930 Granted publication date: 20200103 Pledgee: Agricultural Bank of China Limited Hunan Xiangjiang New Area Branch Pledgor: HUNAN HUDA SUNJOY VEHICLE TECHNOLOGY & EQUIPMENT Co.,Ltd. Registration number: Y2022980017325 |