CN104148570A - Independent male die ejection mechanism for multi-station cold header - Google Patents
Independent male die ejection mechanism for multi-station cold header Download PDFInfo
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- CN104148570A CN104148570A CN201410369983.6A CN201410369983A CN104148570A CN 104148570 A CN104148570 A CN 104148570A CN 201410369983 A CN201410369983 A CN 201410369983A CN 104148570 A CN104148570 A CN 104148570A
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- arm
- connecting rod
- drive source
- strip piece
- independence
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Abstract
The invention discloses an independent male die ejection mechanism for a multi-station cold header. The independent male die ejection mechanism comprises a main slider and a driving source. The driving source is positioned above the slider and capable of horizontally sliding relative to the slider and comprises a horizontal long strip block and short strip blocks arranged on the lower end face of the long strip block, and two ends of the lower end face of each short strip block are in height difference with the lower end face of the long strip block. A swing rod and an ejection arm are vertically arranged on the main slider, the ejection arm consists of a first arm and a second arm, a certain included angle is formed by the first arm and the second arm, the right end of the swing rod and the middle of the ejection arm in the certain included angle are respectively rotatably connected with the main slider, the left end of the swing rod is rotatably connected with a free end of the first arm through a connecting rod, a return spring is arranged between the first arm and the main slider, and a free end of the second arm is capable of moving close to or away from the right end of an ejection rod. The independent male die ejection mechanism for the multi-station cold header has the advantages of large swing amplitude of the ejection arm, small space occupancy of the driving source and large ejected distance of the ejection rod.
Description
Technical field
The present invention relates to a kind of multistage cold former independence formpiston ejecting mechanism.
Background technology
The formpiston ejecting mechanism of cold headers is driven as drive source by bent axle, and control and eject arm rotation by a series of transmission component, the arm that ejects rotating ejects push rod, the distance that push rod is ejected is determined by the pendulum angle that ejects arm, and the amplitude of fluctuation that ejects arm is determined by the conduct of bent axle, because the conduct of bent axle is certain and less, the amplitude of fluctuation that causes ejecting arm is little and non-adjustable, accordingly, the distance distance less and that be ejected that push rod is ejected is certain; Bent axle put need to be larger floor space; Generally, cold headers are equipped with multiple formpiston ejecting mechanisms, consider the larger factor of floor space of bent axle, a set of formpiston ejecting mechanism is only equipped with a bent axle, the multiple formpiston ejecting mechanisms of the common driving of bent axle, add that connecting rod thickness is limited, only can entirety adjust multiple formpiston ejecting mechanisms, each formpiston ejecting mechanism can not independently be adjusted, and applicability is poor.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide the multistage cold former independence formpiston ejecting mechanism that a kind of amplitude of fluctuation is large, floor space is little, adjustable, each push rod all can independently be controlled.
For achieving the above object, technical scheme of the present invention is as follows: a kind of multistage cold former independence formpiston ejecting mechanism, in order to eject horizontally disposed push rod in formpiston, described multistage cold former independence formpiston ejecting mechanism comprises liftout attachment, described liftout attachment comprises master slider and drive source, described drive source is positioned at the top of master slider and the relative sliding of energy occurred level direction, described drive source comprises horizontally disposed strip piece and short bar blocks, described short bar blocks is arranged on the lower surface of strip piece, there is difference in height with the lower surface of strip piece respectively in the two ends of described each short bar blocks lower surface, on described master slider, be provided with swing arm setting up and down, eject arm, the described arm that ejects has the first arm in a certain angle and the second arm, the right-hand member of described swing arm, the in a certain angle middle part that ejects arm is rotationally connected with master slider respectively, the left end of described swing arm is rotationally connected by the free end of connecting rod and the first arm, between described the first arm and master slider, be provided with and can control the return spring that the middle part of swing arm contacts with the lower surface of drive source all the time, the free end of described the second arm can near or away from the direction motion of push rod right-hand member.
Preferably, the upper end of described connecting rod is rotationally connected by the left end of first connecting rod fixed axis and swing arm, and the lower end of described connecting rod is rotationally connected by the free end of second connecting rod fixed axis and the first arm.
Preferably, the left part of described swing arm is provided with the arc adjustment tank of level trend, and described first connecting rod fixed axis can move along arcuate directions in arc adjustment tank, and described first connecting rod fixed axis and arc adjustment tank removably connect.
Preferably, the top of described drive source is provided with horizontally disposed fixed mount, and described drive source can move along the length direction of strip piece in fixed mount lower surface, and the lower surface of described strip piece and fixed mount removably connects.
Preferably, the middle part of described swing arm is provided with the roller contacting with the lower surface of drive source all the time.
Preferably, the two ends of described short bar blocks lower surface are respectively arranged with the fillet surface joining with the lower surface of strip piece.
Preferably, described push rod, liftout attachment are provided with multiple, and described multiple push rods are corresponding one by one with multiple liftout attachments, and described multiple push rods are in same plane and be parallel to each other.
Preferably, described strip piece and short bar blocks are one-body molded.
Adopt the beneficial effect of the technical program to be:
One, form drive source by horizontally disposed strip piece and short bar blocks, and be equipped with return spring, the middle part of return spring control swing arm contacts with the lower surface of drive source all the time, in the time of the relative sliding of master slider and drive source occurred level direction, the middle part of swing arm is by the elastic force effect of return spring, all the time move along the lower surface of drive source, in the time that the middle part of swing arm is moved into short bar blocks lower surface, because the lower surface of short bar blocks and the lower surface of strip piece have certain difference in height, swing arm is forced to rotate, swing arm is driven and is ejected arm rotation by connecting rod, then eject push rod, the distance that push rod is ejected is determined by the difference in height of short bar blocks lower surface and strip piece lower surface, compared to tradition with bent axle as drive source, the amplitude of oscillation that ejects arm is larger, and because drive source is arranged on the top of master slider, floor space is little,
They are two years old, the left part of swing arm is provided with arc adjustment tank, the upper end of connecting rod can be moved along arcuate directions in arc adjustment tank, and the upper end of connecting rod and arc adjustment tank removably connect, the position of connecting rod in the arc adjustment tank of swing arm can be adjusted, by adjusting the position of connecting rod in the arc adjustment tank of swing arm, then can adjust the amplitude of oscillation size that ejects arm, its adjustability, applicability are strong;
They are three years old, above drive source, be provided with horizontally disposed fixed mount, drive source can move along the length direction of strip piece in fixed mount lower surface, and be arranged to removably connect in the lower surface of strip piece and fixed mount, can adjust the position, left and right of drive source, by adjusting drive source in the position, left and right of fixed mount lower surface, then can control time and position that push rod is ejected, its adjustability, applicability are strong;
Its four, arranging of roller ensured that the middle part of swing arm can slide into steadily, smoothly from the lower surface of strip piece the lower surface of short bar blocks;
Its five, the curve of fillet surface can be controlled the time speed that push rod is ejected;
Its six, each station all has a corresponding drive source, multiple stations do not interfere with each other, each station can independently be adjusted the speed that ejects the amplitude of oscillation of arm, time that push rod is ejected and position and push rod and be ejected speed, applicability is stronger.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in embodiment of the present invention technology, to the accompanying drawing of required use in embodiment technical description be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the push rod in the present embodiment while not ejecting;
Fig. 2 is the structural representation of drive source in the present embodiment;
Fig. 3 is the structural representation of the first connected mode that in the present embodiment, the lower surface of strip piece and fixed mount removably connects;
Fig. 4 is the structural representation of the second connected mode that in the present embodiment, the lower surface of strip piece and fixed mount removably connects;
Fig. 5 is the structural representation that in the present embodiment, the arc adjustment tank of first connecting rod fixed axis and swing arm removably connects;
Fig. 6 is the structural representation after the push rod in the present embodiment is ejected.
In figure:
10-fixed mount; 11-fixture block;
20-drive source; 21-strip piece; The short bar blocks of 22-; 23-fillet surface; Stop before 24a-; Stop after 24b-; 25-screw; 26-screwed hole; 27-draw-in groove; 28-screw; 29-screwed hole;
30-master slider;
40-swing arm; 41-roller; 42-arc adjustment tank; 43-swing arm fixed axis;
50-connecting rod; 51-first connecting rod fixed axis; 52-second connecting rod fixed axis; 53-nut; 54-screw thread;
60-ejects arm; 61-the first arm; 62-the second arm; 63-ejects arm fixed axis;
70-return spring;
80-push rod;
90-formpiston.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Consult Fig. 1, Fig. 2, shown in Fig. 6, a kind of multistage cold former independence formpiston ejecting mechanism, in order to eject the interior horizontally disposed push rod 80 of formpiston 90, multistage cold former independence formpiston ejecting mechanism comprises liftout attachment, liftout attachment comprises master slider 30 and drive source 20, drive source 20 is positioned at the top of master slider 30 and the relative sliding of energy occurred level direction, drive source 20 comprises horizontally disposed strip piece 21 and short bar blocks 22, short bar blocks 22 is arranged on the lower surface of strip piece 21, there is difference in height with the lower surface of strip piece 21 respectively in the two ends of each short bar blocks 22 lower surfaces, in the present embodiment, strip piece 21 is one-body molded with short bar blocks 22, on master slider 30, be provided with swing arm setting up and down 40, eject arm 60, eject arm 60 and there is the first arm 61 in a certain angle and the second arm 62, the right-hand member of swing arm 40, the in a certain angle middle part that ejects arm 60 is rotationally connected with master slider 30 respectively, wherein, the right-hand member of swing arm 40 is rotationally connected by swing arm fixed axis 43 and master slider 30, the middle part that ejects arm 60 is rotationally connected with master slider 30 by ejecting arm fixed axis 63, the left end of swing arm 40 is rotationally connected by the free end of connecting rod 50 and the first arm 61, between the first arm 61 and master slider 30, be provided with and can control the return spring 70 that the middle part of swing arm 40 contacts with the lower surface of drive source 20 all the time, the free end of the second arm 62 can near or away from the direction motion of push rod 80 right-hand members.The distance that push rod 80 is ejected is determined by the difference in height of short bar blocks 22 lower surfaces and strip piece 21 lower surfaces, compared to tradition with bent axle as drive source, the amplitude of oscillation that ejects arm 60 is larger, and because drive source 20 is arranged on the top of master slider 30, floor space is little.
Concrete, in the present embodiment, connecting rod 50 vertically moves towards, and the upper end of connecting rod 50 is rotationally connected by first connecting rod fixed axis 51 and the left end of swing arm 40, and the lower end of connecting rod 50 is rotationally connected by the free end of second connecting rod fixed axis 52 and the first arm 61.First connecting rod fixed axis 51 is vertically set on the left end of swing arm 40, the upper end of connecting rod 50 is set on first connecting rod fixed axis 51, second connecting rod fixed axis 52 is vertically set on the free end of the first arm 61, and the free end of the first arm 61 is set on second connecting rod fixed axis 52.
The left part of swing arm 40 is provided with the arc adjustment tank 42 of level trend, and first connecting rod fixed axis 51 can move along arcuate directions arc adjustment tank 42 is interior, and first connecting rod fixed axis 51 removably connects with arc adjustment tank 42.In the time that first connecting rod fixed axis 51 moves to the high order end of arc adjustment tank 42, now adjust the amplitude of oscillation maximum that ejects arm 60; In the time that first connecting rod fixed axis 51 moves to the low order end of arc adjustment tank 42, now adjust the amplitude of oscillation minimum that ejects arm 60, by adjusting the position of first connecting rod fixed axis 51 in arc adjustment tank 42, then adjust the amplitude of oscillation size that ejects arm 60, adjust ejection stroke.As shown in Figure 5, the structure that removably connects that first connecting rod fixed axis 51 and arc adjustment tank 42 are concrete is, the vertical left end through swing arm 40 of first connecting rod fixed axis 51, on two ends outer wall through the first connecting rod fixed axis 51 of the left end of swing arm 40, be provided with screw thread 54, every end is all equipped with a nut 53 coordinating with this screw thread 54, when fixing, only need to screw in opposite directions two nuts 53, in the time that two nuts 53 clamp two swing arms 40 between nut 53, now 51 of first connecting rod fixed axis are fixed in arc adjustment tank 42, can not move along arcuate directions arc adjustment tank 42 is interior, adjust amplitude of oscillation when size that ejects arm 60 if need, only need to unscrew one of them nut 53, move first connecting rod fixed axis 51 along arcuate directions arc adjustment tank 42 is interior, until first connecting rod fixed axis 51 is adjusted to desired location, now, then screw nut 53.
The top of drive source 20 is provided with horizontally disposed fixed mount 10, and drive source 20 can move along the length direction of strip piece 21 in fixed mount 10 lower surfaces, and strip piece 21 removably connects with the lower surface of fixed mount 10.In the time that drive source 20 is fixed on the left end of fixed mount 10 lower surfaces, the time that push rod 80 is ejected early; In the time that drive source 20 is fixed on the right-hand member of fixed mount 10 lower surfaces, the time that push rod 80 is ejected is more late, due in both cases, the asynchronism(-nization) that push rod 80 is ejected, when which point master slider 30 moves right, start to eject to eject position naturally also different.The adjustment that cooperatively interacts by drive source 20 with connecting rod 50, can make ejecting of push rod 80 reach optimum efficiency.In the present embodiment, strip piece 21 has following two kinds with the detailed description of the invention that the lower surface of fixed mount 10 removably connects: as shown in Figure 3, the first mode of removably connecting is, along being respectively arranged with multiple screwed holes 26 on the strip piece 21 of strip piece 2 length directions and fixed mount 10, screwed hole 26 quantity on strip piece 21 are less than the quantity of the screwed hole on fixed mount 10, screwed hole on strip piece 21 can coordinate with any several screwed holes 26 on fixed mount 10, strip piece 21 is adjusted to after desired location, screwed hole on strip piece 21 is corresponding with any several screwed holes 26 on fixed mount 10, locking screw 25 can realize detachable fixing, as shown in Figure 4, the second mode of removably connecting is, the upper surface of strip piece 21 is provided with the draw-in groove 27 arranging along strip piece 21 length directions, the lower surface of fixed mount 10 is provided with the fixture block 11 coordinating with draw-in groove 27, strip piece 21 is slidably arranged in the below of fixed mount 10 by fixture block 11 and coordinating of draw-in groove 27, and on strip piece 21, be provided with screwed hole 29, at the catotropic screw 28 of the interior outfit screw of screwed hole 29, push up to the bottom of fixed mount 10 at the top of screw 28, realization removably connects, need to adjust time, unscrew screw 28, along fixture block 11 moving long bar blocks 21, until arrival desired location, screwing screw 28 can fix again.Certainly, removably connect in mode at the second, can be by the location swap of draw-in groove 27 and fixture block 11.
The middle part of swing arm 40 is provided with the roller 41 contacting with the lower surface of drive source 20 all the time.The arranging of roller 41 ensured the middle part of swing arm 40 can be steadily, move in the lower surface of drive source 20 smoothly.
The two ends of short bar blocks 22 lower surfaces are respectively arranged with the fillet surface 23 joining with the lower surface of strip piece 21.The setting of fillet surface 23, has further ensured that roller 41 can be transitioned into stably from the lower surface of strip piece 21 lower surface of short bar blocks 22; In addition, the curve of fillet surface 23 has determined the speed of the speed that push rod 80 is ejected, in the time that profile amplitude is larger, and the speed that push rod 80 is ejected; When profile amplitude hour, the speed that push rod 80 is ejected is slower.
Push rod 80, liftout attachment are provided with multiple, and multiple push rods 80 are corresponding one by one with multiple liftout attachments, and multiple push rods 80 are in same plane and be parallel to each other.Accordingly, multiple liftout attachments are parallel to each other, multiple drive sources 20 are also parallel to each other, each station all has a corresponding drive source 20, for thering is the cold headers independence formpiston ejecting mechanism of multiple stations, multiple stations do not interfere with each other, and each station can independently be adjusted and eject the amplitude of oscillation, time that push rod 80 is ejected of arm 60 and eject position and push rod 80 is ejected the speed of speed, and applicability is stronger.
Drive source 20 has front stop 24a, rear stop 24b, front stop 24a is positioned at the difference in height place of the lower surface of strip piece 21 and short bar blocks 22 lower surfaces of left end, rear stop 24b is positioned at the difference in height place of the lower surface of strip piece 21 and short bar blocks 22 lower surfaces of right-hand member, drive source 20 in the present embodiment is motionless, and master slider 30 can side-to-side movement.As shown in Figure 1, while startup, roller 41 on master slider 30 is positioned at the front side of front stop 24a, master slider 30 moves right, the stop 24a motion forward of roller 41 on swing arm 40, while continuing to move right again, as shown in Figure 6, roller 41 is depressed by the lower surface of the short bar blocks 22 of drive source 20, the left end of swing arm 40 rotates around the swing arm fixed axis 43 of right-hand member, the left end of swing arm 40 drives the first arm 61 that ejects arm 60 to rotate certain angle around ejecting arm fixed axis 63 by connecting rod 50, return spring 70 by compression, the elastic force that return spring 70 by compression produces forces the roller 41 on swing arm 40 to contact with the lower surface of drive source 20 all the time, simultaneously, the free end of the second arm 62 is to moving near push rod 80 right-hand members, thereby make push rod 80 in formpiston 90 certain distance that slides left, push rod 80 is ejected.In the time that master slider 30 moves to rear stop 24b, master slider 30 can turn around to slide left, again gets back to front stop 24a position as shown in Figure 1, completes a working cycles.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. a multistage cold former independence formpiston ejecting mechanism, in order to eject horizontally disposed push rod in formpiston, described multistage cold former independence formpiston ejecting mechanism comprises liftout attachment, it is characterized in that: described liftout attachment comprises master slider and drive source, described drive source is positioned at the top of master slider and the relative sliding of energy occurred level direction, described drive source comprises horizontally disposed strip piece and short bar blocks, described short bar blocks is arranged on the lower surface of strip piece, there is difference in height with the lower surface of strip piece respectively in the two ends of described each short bar blocks lower surface, on described master slider, be provided with swing arm setting up and down, eject arm, the described arm that ejects has the first arm in a certain angle and the second arm, the right-hand member of described swing arm, the in a certain angle middle part that ejects arm is rotationally connected with master slider respectively, the left end of described swing arm is rotationally connected by the free end of connecting rod and the first arm, between described the first arm and master slider, be provided with and can control the return spring that the middle part of swing arm contacts with the lower surface of drive source all the time, the free end of described the second arm can near or away from the direction motion of push rod right-hand member.
2. multistage cold former independence formpiston ejecting mechanism according to claim 1, it is characterized in that: the upper end of described connecting rod is rotationally connected by the left end of first connecting rod fixed axis and swing arm, the lower end of described connecting rod is rotationally connected by the free end of second connecting rod fixed axis and the first arm.
3. want the multistage cold former independence formpiston ejecting mechanism described in 2 according to right, it is characterized in that: the left part of described swing arm is provided with the arc adjustment tank of level trend, described first connecting rod fixed axis can move along arcuate directions in arc adjustment tank, and described first connecting rod fixed axis and arc adjustment tank removably connect.
4. multistage cold former independence formpiston ejecting mechanism according to claim 3, it is characterized in that: the top of described drive source is provided with horizontally disposed fixed mount, described drive source can move along the length direction of strip piece in fixed mount lower surface, and the lower surface of described strip piece and fixed mount removably connects.
5. multistage cold former independence formpiston ejecting mechanism according to claim 4, is characterized in that: the middle part of described swing arm is provided with the roller contacting with the lower surface of drive source all the time.
6. multistage cold former independence formpiston ejecting mechanism according to claim 5, is characterized in that: the two ends of described short bar blocks lower surface are respectively arranged with the fillet surface joining with the lower surface of strip piece.
7. multistage cold former independence formpiston ejecting mechanism according to claim 6, it is characterized in that: described push rod, liftout attachment are provided with multiple, described multiple push rod is corresponding one by one with multiple liftout attachments, and described multiple push rods are in same plane and be parallel to each other.
8. according to the multistage cold former independence formpiston ejecting mechanism described in claim 1-7 any one, it is characterized in that: described strip piece and short bar blocks are one-body molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410369983.6A CN104148570B (en) | 2014-07-30 | 2014-07-30 | Multistage cold former independence formpiston ejecting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410369983.6A CN104148570B (en) | 2014-07-30 | 2014-07-30 | Multistage cold former independence formpiston ejecting mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104148570A true CN104148570A (en) | 2014-11-19 |
| CN104148570B CN104148570B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410369983.6A Expired - Fee Related CN104148570B (en) | 2014-07-30 | 2014-07-30 | Multistage cold former independence formpiston ejecting mechanism |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4967586A (en) * | 1988-07-23 | 1990-11-06 | Gebr. Hilgeland Gmbh And Co. | Upsetting press for upsetting or swaging wire segments of predetermined lengths into balls or the like |
| JP2002282990A (en) * | 2001-03-22 | 2002-10-02 | Sakamura Mach Co Ltd | Multistage type heading machine |
| CN201186332Y (en) * | 2008-04-29 | 2009-01-28 | 东莞市金苗五金机械有限公司 | Multi-station bolt cold upsetting machine |
| CN202207768U (en) * | 2011-08-12 | 2012-05-02 | 付胜刚 | Positioning and adjusting device of cold header feeding clamp |
| CN202606768U (en) * | 2012-06-26 | 2012-12-19 | 浙江东瑞机械工业有限公司 | Cold header front passing-put device |
| CN204135268U (en) * | 2014-07-30 | 2015-02-04 | 昆山新崴精密五金有限公司 | Multistage cold former independence formpiston ejecting mechanism |
-
2014
- 2014-07-30 CN CN201410369983.6A patent/CN104148570B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4967586A (en) * | 1988-07-23 | 1990-11-06 | Gebr. Hilgeland Gmbh And Co. | Upsetting press for upsetting or swaging wire segments of predetermined lengths into balls or the like |
| JP2002282990A (en) * | 2001-03-22 | 2002-10-02 | Sakamura Mach Co Ltd | Multistage type heading machine |
| CN201186332Y (en) * | 2008-04-29 | 2009-01-28 | 东莞市金苗五金机械有限公司 | Multi-station bolt cold upsetting machine |
| CN202207768U (en) * | 2011-08-12 | 2012-05-02 | 付胜刚 | Positioning and adjusting device of cold header feeding clamp |
| CN202606768U (en) * | 2012-06-26 | 2012-12-19 | 浙江东瑞机械工业有限公司 | Cold header front passing-put device |
| CN204135268U (en) * | 2014-07-30 | 2015-02-04 | 昆山新崴精密五金有限公司 | Multistage cold former independence formpiston ejecting mechanism |
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| CN104148570B (en) | 2016-06-08 |
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Address after: 215345 Jiangsu city of Kunshan province Dianshan Lake Dian Xing Road No. 123 Applicant after: KUNSHAN XINWEI PRECISION HARDWARE CO., LTD. Address before: Suzhou City, Jiangsu province 215345 city of Kunshan Dianshan Lake Dian Xing Road No. 123 Applicant before: KUNSHAN XINWEI PRECISION METAL CO., LTD. |
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Granted publication date: 20160608 Termination date: 20200730 |