CN103230978A - Necking die of strengthening isolating sleeve of automobile - Google Patents
Necking die of strengthening isolating sleeve of automobile Download PDFInfo
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- CN103230978A CN103230978A CN2013101825721A CN201310182572A CN103230978A CN 103230978 A CN103230978 A CN 103230978A CN 2013101825721 A CN2013101825721 A CN 2013101825721A CN 201310182572 A CN201310182572 A CN 201310182572A CN 103230978 A CN103230978 A CN 103230978A
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Abstract
The invention discloses a necking die of a strengthening isolating sleeve of an automobile. The necking die comprises an upper die portion, a lower die portion and a material ejection portion, wherein the upper die portion is provided with a material knocking rod, a die shank, an inner hexagonal screw, an upper die base, a concave die, a material knocking block, a first guide sleeve and a second guide sleeve, the lower die portion is provided with a protruding die, a material ejection plate, a material ejection rod, a protruding die fixing block, an inner hexagonal screw, a pin, a lower die base, a first guide column and a second guide column, and the material ejection portion is provided with a spring seat I, a spring, a spring seat II, a bolt, a gasket and a nut.
Description
Technical field
The present invention relates to the Stamping Die Technology field, particularly a kind of automobile is strengthened the spacer reducing die.
Background technology
In more automobile axle making field, need to use the reinforcement spacer, when the back axle central siphon is connected with stage casing two mouths of pipe because caliber position need increase fusion penetration rate and bulk strength, the reinforcement spacer increases the accessory of weld strength and fusion penetration rate when being exactly welding, general reinforcement spacer junction spacer orifice configuration length is about 20% of total length, at present, strengthening spacer normally processes with seamless steel pipe turning, because shape is various, similar again, size is close, and quantity is many, processes in this way, efficient is very low, waste of material is also big, and finished size can not reach the cooperation requirement, causes problems such as production cost height and difficult management, therefore, existing processing method is difficult to meet the needs of production.
Summary of the invention
In order to solve prior art problems, the invention provides a kind of automobile and strengthen the spacer reducing die, it can be enhanced productivity, and reduces cost.
Technical scheme of the present invention is: a kind of automobile is strengthened the spacer reducing die, and it partly is made up of part of the upper die, part of the lower die, liftout.
The part of the upper die is furnished with knockout rod, die shank, soket head cap screw, upper bolster, die, dnockout piece, first guide pin bushing, second guide pin bushing.
Described knockout rod is arranged on the top of the centre of part of the upper die, described die shank be arranged on knockout rod below, be furnished with through hole in the die shank, and knockout rod links to each other with the dnockout piece by engage thread.
Described upper bolster is arranged on the below of die shank, the upper bolster top center is furnished with stepped hole, die shank is installed on the upper bolster by being pressed into the close-fitting formula, and upper bolster also is furnished with stepped hole and bolt mounting holes in the middle of the below, and place, left and right two ends, upper bolster below respectively is furnished with a macropore.
Described die is arranged on the below of part of the upper die, the centre is furnished with step through-hole, and the hole is provided with bolt mounting holes around the next door, and the die top is connected with the upper bolster below by three soket head cap screws, die bottom center size makes consistent with the product excircle dimension, is the patrix shape of reducing.
Described dnockout piece is arranged on the below of knockout rod, and dnockout piece top is furnished with screw thread, is connected with knockout rod, and dnockout piece below is furnished with stepped hole.
Described first guide pin bushing and second guide pin bushing are arranged on the left and right both sides of upper bolster, are installed in the upper bolster below by close-fitting.
Upper bolster is provided with first dowel hole and second dowel hole about the below, be used for mounting guide sleeve, be installed in the patrix below by the close-fitting mode, be used for realizing accurately mould being located of mould up and down, the upper bolster top is provided with die shank, be tight with in the stepped hole on the upper bolster by being pressed into mode, be used for being located by connecting with lathe, die shank central authorities are provided with knockout rod, the knockout rod top is located at the top of die shank, and the knockout rod below is connected with dnockout piece screw thread, forms dnockout mechanism, the below is provided with die in the middle of the upper bolster, is installed on the upper bolster by three soket head cap screws and two pins.
The part of the lower die is furnished with punch, die pad, ejector beam, punch fixed block, soket head cap screw, pin, die shoe, first guide pillar, second guide pillar.
Described punch is arranged on the top of part of the lower die, and the punch middle-end is furnished with step, and punch below is external screw thread, punch top intermediate sizes as with product in the circle consistent size, be the counterdie shape of reducing.
Described die pad is arranged on the middle-end on the next door of punch, and the endoporus of die pad adopts matched in clearance to be connected with punch and cylindrical.
Described punch retainer be arranged on die pad below, the other end is connected with die shoe, top center is furnished with stepped hole, the punch retainer bottom center is furnished with internal thread hole, be furnished with three stepped counterbore on the circumference of punch retainer top, also be provided with three bolts hole and two pin holes on the circumference of punch retainer below.
Described die shoe is arranged on the below of part of the lower die, die shoe is furnished with stepped hole in the middle of the top, die shoe is furnished with screwed hole in the middle of the below, the die shoe below also is furnished with three ejector beam holes, three bolt mounting holes, two pin holes, the punch fixed block can be connected with the die shoe positioning and fixing with pin by soket head cap screw, place, left and right two ends, die shoe top respectively is furnished with an aperture.
Described first guide pillar and second guide pillar are arranged on the left and right both sides of die shoe, are installed in the die shoe top by close-fitting.
Die shoe is provided with the first guide pillar hole and the second guide pillar hole about the top, be used for installing guide pillar, be installed in the counterdie top by the close-fitting mode, be used for realizing accurately mould being located of mould up and down, the die shoe central upper is provided with the punch fixed block, be installed on the die shoe by three soket head cap screws and two pins, punch is installed in the middle of the punch fixed block by engage thread, the punch next door is provided with die pad, join on the outer ring that is installed in punch by sliding, drive die pad by ejector beam during liftout and move up and down, play liftout, circumference at the punch fixed block is provided with three ejector beam holes, be that ejector beam is installed, also be provided with three ejector beam holes on the die shoe, concentric with three ejector beam holes of punch fixed block, the die shoe bottom center also is provided with the screw rod installing hole, is used for installing screw rod.
Liftout partly is furnished with spring base I, spring, spring base II, screw rod, pad, nut.
Described spring base I is arranged on the below of die shoe, greatly head-up, upside down little, spring one end is installed in microcephaly's below, and spring base II greatly upside down, and is head-up little, be installed in the other end of spring, described spring base I, II central authorities all are furnished with through hole, and the threaded one end of screw rod is connected with die shoe, and the other end of screw rod is fixedly connected with pad, nut.
Spring base I is installed in the below of die shoe, and the centre is located at the screw rod installing hole, is used for installing screw rod, the below mounting spring of spring base I is installed with one heart with spring base II again, fixes by screw thread with pad and nut at last, be used for holddown spring, play pre-compressed spring, form material jacking mechanism.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is:
This area can be according to the different punch of different part configuration design and die, thereby solves the problem that is complementary with back axle, has reduced production cost widely.On the other hand, this strengthen that spacer reducing die is simple in structure, highly versatile, production efficiency height, applied widely, easy and simple to handle.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of knockout rod;
Fig. 3 is the structural representation of dnockout piece;
Fig. 4 is the structural representation of upper bolster
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the structural representation of die;
Fig. 7 is the left view of Fig. 6;
Fig. 8 is the structural representation of punch fixed block;
Fig. 9 is the left view of Fig. 8;
Figure 10 is the structural representation of die shoe;
Figure 11 is the left view of Figure 10.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Technical scheme of the present invention is: a kind of automobile is strengthened the spacer reducing die, and it partly is made up of part of the upper die, part of the lower die, liftout.
The part of the upper die is furnished with knockout rod 1, die shank 2, soket head cap screw 3, upper bolster 4, die 5, dnockout piece 6, the first guide pin bushing 20-1, the second guide pin bushing 20-2.
Described knockout rod 1 is arranged on the top of the centre of part of the upper die, described die shank 2 be arranged on knockout rod 1 below, be furnished with through hole in the die shank 2, and knockout rod 1 links to each other with dnockout piece 6 by engage thread.
Described upper bolster 4 is arranged on the below of die shank 2, upper bolster 4 top center are furnished with stepped hole 4-3, die shank 2 is installed on the upper bolster 4 by being pressed into the close-fitting formula, also be furnished with stepped hole 4-4 and bolt mounting holes 4-5 in the middle of upper bolster 4 belows, place, left and right two ends, upper bolster 4 belows respectively is furnished with a macropore 4-1 and 4-2.
Described die 5 is arranged on the below of part of the upper die, the centre is furnished with step through-hole 5-1, the hole is provided with bolt mounting holes 5-2 around the next door, die 5 tops are connected with upper bolster 4 belows by three soket head cap screws 3, die 5 bottom center sizes make consistent with the product excircle dimension, are the patrix shapes of reducing.
Described dnockout piece 6 is arranged on the below of knockout rod 1, and dnockout piece 6 tops are furnished with screw thread 6-1, are connected with knockout rod 1, and dnockout piece 6 belows are furnished with stepped hole 6-2.
The described first guide pin bushing 20-1 and the second guide pin bushing 20-2 are arranged on the left and right both sides of upper bolster 4, are installed in upper bolster 4 belows by close-fitting.
Upper bolster is provided with the first dowel hole 4-1 and the second dowel hole 4-2 about the below, be used for mounting guide sleeve 20-1 and 20-2 respectively, be installed in the patrix below by the close-fitting mode, be used for realizing accurately mould being located of mould up and down, upper bolster 4 tops are provided with die shank 2, be tight with in the stepped hole on the upper bolster by being pressed into mode, be used for being located by connecting with lathe, die shank 2 central authorities are provided with knockout rod 1, the knockout rod top is located at the top of die shank, and the knockout rod below is connected with dnockout piece screw thread, forms dnockout mechanism, the below is provided with die 5 in the middle of the upper bolster, is installed on the upper bolster by three soket head cap screws and two pins.
The part of the lower die is furnished with punch 7, die pad 8, ejector beam 9, punch fixed block 10, soket head cap screw 11, pin 17, die shoe 18, the first guide pillar 19-1, the second guide pillar 19-2.
Described punch 7 is arranged on the top of part of the lower die, and punch 7 middle-ends are furnished with step, and punch 7 belows are external screw threads, punch 7 top intermediate sizes as with product in the circle consistent size, be the counterdie shape of reducing.
Described die pad 9 is arranged on the middle-end on the next door of punch 7, and the endoporus of die pad 9 adopts matched in clearance to be connected with punch 7 and cylindrical.
Described punch retainer 10 be arranged on die pad 8 below, the other end is connected with die shoe 18, top center is furnished with stepped hole 10-8, punch retainer 10 bottom center are furnished with internal thread hole 10-5, are furnished with three stepped counterbore 10-1 on the punch retainer 10 top circumference, 10-2,10-3 also is provided with three bolt hole 10-6 and two pin hole 10-7 on the punch retainer 10 below circumference.
Described die shoe 18 is arranged on the below of part of the lower die, is furnished with stepped hole 18-7 in the middle of die shoe 18 tops, be used for installing punch fixed block 10, is furnished with screwed hole 18-6 in the middle of die shoe 18 belows, die shoe 18 belows also are furnished with three ejector beam 9 holes, also are furnished with three bolt mounting holes 18-8, two pin hole 18-9, the usefulness that punch fixed block 10 can be connected with die shoe 18 positioning and fixing by soket head cap screw 17 and pin 11, place, left and right two ends, die shoe 18 tops respectively is furnished with an aperture 18-1,18-2.
The described first guide pillar 19-1 and the second guide pillar 19-2 are arranged on the left and right both sides of die shoe 18, are installed in die shoe 18 tops by close-fitting.
Die shoe is provided with the first guide pillar hole 18-1 and the second guide pillar hole 18-2 about the top, be used for installing guide pillar 19-1 and 19-2 respectively, be installed in the counterdie top by the close-fitting mode, be used for realizing accurately mould being located of mould up and down, the die shoe central upper is provided with punch fixed block 10, be installed on the die shoe by three soket head cap screws 11 and two pins 17, punch 7 is installed to by engage thread in the middle of the punch fixed block, and punch 7 next doors are provided with die pad 8, joins on the outer ring that is installed in punch 7 by sliding, driving die pad 8 by ejector beam 9 during liftout moves up and down, play liftout, be provided with three ejector beam hole 10-1,10-2 at the circumference of punch fixed block 10,10-3, be that ejector beam is installed, also be provided with three ejector beam hole 18-3 on the die shoe, 18-4,18-5, with three ejector beam hole 10-1 of punch fixed block 10,10-2,10-3 is concentric, the die shoe bottom center also is provided with screw rod installing hole 18-6, is used for installing screw rod.
Liftout partly is furnished with spring base I12-1, spring 13, spring base II12-2, screw rod 14, pad 15, nut 16.
Described spring base I12-1 is arranged on the below of die shoe 18, greatly head-up, upside down little, spring 13 1 ends are installed in microcephaly's below, and spring base II12-2 greatly upside down, and is head-up little, be installed in the other end of spring 13, described spring base I12-1, spring base II12-2 central authorities all are furnished with through hole, and the threaded one end of screw rod 14 is connected with die shoe 18, and the other end of screw rod 14 is fixedly connected with pad 15, nut 16.
Spring base I is installed in the below of die shoe, and the centre is located at the screw rod installing hole, is used for installing screw rod, the below mounting spring of spring base I is installed with one heart with spring base II again, fixes by screw thread with pad and nut at last, be used for holddown spring, play pre-compressed spring, form material jacking mechanism.
Operation principle: during work, earlier with the part of the upper die, the part of the lower die, it is fastening good that each part on the liftout part is installed, the die shank 2 of part of the upper die is connected with the endoporus of the top shoe of lathe, the part of the lower die is installed on the lathe table top then, to go up, the guide pin bushing of counterdie and guide pillar are to the center, have good positioning, utilize on the lathe, under T type bolt hole, to go up with pressing plate and bolt, die shoe and lathe top shoe and work top fix, the shift knob of crawl machine tool, adjust the shut height of lathe and die holder, part of the lower die on the work top is left in the part of the upper die of top shoe, to strengthen the spacer workpiece and put into punch 7, starting device, the die 5 of part of the upper die contacts with lower part punch 7, to strengthen spacer upper end necking forming, last, in the time of following the contact, knockout rod 1 in the part of the upper die drives dnockout piece 6 and moves up earlier, the material jacking mechanism of counterdie makes spring 13 compressions, driving die pad 8 and ejector beam 9 moves down together, after the mould reducing puts in place, the lathe return, rise on the part of the upper die, utilize the dnockout effect of knockout rod 1 and dnockout piece 6, prevent from strengthening in the die 5 that spacer is retained in the part of the upper die spring 13 returns in the material jacking mechanism under the part of the lower die, ejector beam 9 and die pad 8 are moved up together, will strengthen the spacer workpiece with die pad 8 and from punch 7, eject.
Claims (7)
1. an automobile is strengthened the spacer reducing die, it is characterized in that: it comprises the part of the upper die, the part of the lower die, the liftout part, the part of the upper die is furnished with knockout rod, die shank, soket head cap screw, upper bolster, die, the dnockout piece, first guide pin bushing, second guide pin bushing, liftout partly is furnished with spring base I, spring, spring base II, screw rod, pad, nut, spring base I is arranged on the below of die shoe, greatly head-up, upside down little, spring one end is installed in microcephaly's below, spring base II greatly upside down, head-up little, be installed in the other end of spring, described spring base I, II central authorities all are furnished with through hole, and the threaded one end of screw rod is connected with die shoe, the other end pad of screw rod, nut is fixedly connected.
2. a kind of automobile according to claim 1 is strengthened the spacer reducing die, it is characterized in that: spring base I is installed in the below of die shoe, and the centre is provided with the screw rod installing hole, the below mounting spring of spring base I, install with one heart with spring base II again, fix by screw thread with pad and nut at last.
3. a kind of automobile according to claim 1 is strengthened the spacer reducing die, it is characterized in that: knockout rod is arranged on the top of the centre of part of the upper die, die shank be arranged on knockout rod below, is furnished with through hole in the die shank, and knockout rod links to each other with the dnockout piece by engage thread, upper bolster is arranged on the below of die shank, the upper bolster top center is furnished with stepped hole, die shank is installed on the upper bolster by being pressed into the close-fitting formula, upper bolster also is furnished with stepped hole and bolt mounting holes in the middle of the below, a left side, upper bolster below, place, right two ends respectively is furnished with a macropore, die is arranged on the below of part of the upper die, and the centre is furnished with step through-hole, and the die top is connected with the upper bolster below by three soket head cap screws, die bottom center size makes consistent with the product excircle dimension, is the patrix shape of reducing.
4. a kind of automobile according to claim 1 is strengthened the spacer reducing die, it is characterized in that: the dnockout piece is arranged on the below of knockout rod, dnockout piece top is furnished with screw thread, be connected with knockout rod, dnockout piece below is furnished with step, first guide pin bushing and second guide pin bushing are arranged on the left and right both sides of upper bolster, are installed in the upper bolster below by close-fitting.
5. a kind of automobile according to claim 1 is strengthened the spacer reducing die, it is characterized in that: upper bolster is provided with first dowel hole and second dowel hole about the below, be installed in the patrix below by the close-fitting mode, the upper bolster top is provided with die shank, be tight with in the stepped hole on the upper bolster by being pressed into mode, die shank central authorities are provided with knockout rod, the knockout rod top is located at the top of die shank, the knockout rod below is connected with dnockout piece screw thread, the below is provided with die in the middle of the upper bolster, is installed on the upper bolster by three soket head cap screws and two pins.
6. a kind of automobile according to claim 1 is strengthened the spacer reducing die, it is characterized in that: the part of the lower die is furnished with punch, die pad, ejector beam, the punch fixed block, soket head cap screw, pin, die shoe, first guide pillar, second guide pillar, punch is arranged on the top of part of the lower die, the punch middle-end is furnished with step, the punch below is external screw thread, punch top intermediate sizes as with product in the circle consistent size, die pad is arranged on the middle-end on the next door of punch, the endoporus of die pad adopts matched in clearance to be connected with punch and cylindrical, punch retainer be arranged on die pad below, the other end is connected with die shoe, top center is furnished with stepped hole, the punch retainer bottom center is furnished with internal thread hole, are furnished with three stepped counterbore on the circumference of punch retainer top, also be provided with three bolts hole and two pin holes on the circumference of punch retainer below, die shoe is arranged on the below of part of the lower die, die shoe is furnished with stepped hole in the middle of the top, die shoe is furnished with screwed hole in the middle of the below, the die shoe below also is furnished with three ejector beam holes, three bolt mounting holes, two pin holes, the punch fixed block can be connected with the die shoe positioning and fixing with pin by soket head cap screw, a left side, die shoe top, place, right two ends respectively is furnished with an aperture, described first guide pillar and second guide pillar are arranged on the left side of die shoe, right both sides are installed in the die shoe top.
7. strengthen the spacer reducing die according to claim 1 or 6 described a kind of automobiles, it is characterized in that: die shoe is provided with the first guide pillar hole and the second guide pillar hole about the top, be installed in the counterdie top by the close-fitting mode, be used for realizing accurately mould being located of mould up and down, the die shoe central upper is provided with the punch fixed block, be installed on the die shoe by three soket head cap screws and two pins, punch is installed in the middle of the punch fixed block by engage thread, the punch next door is provided with die pad, join on the outer ring that is installed in punch by sliding, driving die pad by ejector beam during liftout moves up and down, circumference at the punch fixed block is provided with three ejector beam holes, also be provided with three ejector beam holes on the die shoe, concentric with three ejector beam holes of punch fixed block, the die shoe bottom center also is provided with the screw rod installing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101825721A CN103230978A (en) | 2013-05-17 | 2013-05-17 | Necking die of strengthening isolating sleeve of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101825721A CN103230978A (en) | 2013-05-17 | 2013-05-17 | Necking die of strengthening isolating sleeve of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103230978A true CN103230978A (en) | 2013-08-07 |
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ID=48879086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101825721A Pending CN103230978A (en) | 2013-05-17 | 2013-05-17 | Necking die of strengthening isolating sleeve of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103230978A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104139109A (en) * | 2014-07-23 | 2014-11-12 | 成都市龙泉驿区齐盛机械厂 | Necking die of lampshade |
| CN104985635A (en) * | 2015-07-15 | 2015-10-21 | 江苏麒浩精密机械股份有限公司 | Instant noodle bowl cover punching die with noise lowering function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0575112A1 (en) * | 1992-06-12 | 1993-12-22 | Topy Kogyo Kabushiki Kaisha | Method for forming an annular member |
| JPH08117904A (en) * | 1994-10-24 | 1996-05-14 | Takeuchi Press Ind Co Ltd | Manufacture of high pressure gas container |
| CN201470712U (en) * | 2009-08-31 | 2010-05-19 | 隆昌山川精密焊管有限责任公司 | Detachable multiple closing-in forming die for tubular goods |
| CN201524748U (en) * | 2009-09-27 | 2010-07-14 | 中航力源液压股份有限公司 | Once punch forming die of thin-wall elastic steel ring |
| CN202137269U (en) * | 2011-06-18 | 2012-02-08 | 湖州欧亚轴承配件厂 | A die used for reducing an outer diameter of a bearing outer ring opening |
| CN202479343U (en) * | 2011-12-06 | 2012-10-10 | 重庆红岩方大汽车悬架有限公司 | Stamping die for automobile plate-spring boss |
| CN202803969U (en) * | 2012-09-08 | 2013-03-20 | 无锡隆盛科技股份有限公司 | Simple necking device capable of quickly adjusting angle |
| CN203330249U (en) * | 2013-05-17 | 2013-12-11 | 衡阳风顺车桥有限公司 | Automobile reinforcing spacer bush necking die |
-
2013
- 2013-05-17 CN CN2013101825721A patent/CN103230978A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0575112A1 (en) * | 1992-06-12 | 1993-12-22 | Topy Kogyo Kabushiki Kaisha | Method for forming an annular member |
| JPH08117904A (en) * | 1994-10-24 | 1996-05-14 | Takeuchi Press Ind Co Ltd | Manufacture of high pressure gas container |
| CN201470712U (en) * | 2009-08-31 | 2010-05-19 | 隆昌山川精密焊管有限责任公司 | Detachable multiple closing-in forming die for tubular goods |
| CN201524748U (en) * | 2009-09-27 | 2010-07-14 | 中航力源液压股份有限公司 | Once punch forming die of thin-wall elastic steel ring |
| CN202137269U (en) * | 2011-06-18 | 2012-02-08 | 湖州欧亚轴承配件厂 | A die used for reducing an outer diameter of a bearing outer ring opening |
| CN202479343U (en) * | 2011-12-06 | 2012-10-10 | 重庆红岩方大汽车悬架有限公司 | Stamping die for automobile plate-spring boss |
| CN202803969U (en) * | 2012-09-08 | 2013-03-20 | 无锡隆盛科技股份有限公司 | Simple necking device capable of quickly adjusting angle |
| CN203330249U (en) * | 2013-05-17 | 2013-12-11 | 衡阳风顺车桥有限公司 | Automobile reinforcing spacer bush necking die |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104139109A (en) * | 2014-07-23 | 2014-11-12 | 成都市龙泉驿区齐盛机械厂 | Necking die of lampshade |
| CN104985635A (en) * | 2015-07-15 | 2015-10-21 | 江苏麒浩精密机械股份有限公司 | Instant noodle bowl cover punching die with noise lowering function |
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Application publication date: 20130807 |
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