CN102632142A - Hot stamping die for latches - Google Patents
Hot stamping die for latches Download PDFInfo
- Publication number
- CN102632142A CN102632142A CN2012100877103A CN201210087710A CN102632142A CN 102632142 A CN102632142 A CN 102632142A CN 2012100877103 A CN2012100877103 A CN 2012100877103A CN 201210087710 A CN201210087710 A CN 201210087710A CN 102632142 A CN102632142 A CN 102632142A
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- Prior art keywords
- die
- dynamic model
- plate
- snap close
- drift
- Prior art date
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- 229920001971 elastomer Polymers 0.000 claims description 31
- 239000000806 elastomer Substances 0.000 claims description 30
- 238000004080 punching Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a hot stamping die for latches, which comprises an upper die and a lower die. A die shank (1), an upper die set (2), an upper die cushion plate (3), a fixing plate (4), an elastic body (5) and a stripper plate (6) are sequentially fixedly connected to the upper die from top to bottom, a lower die set (7), a lower die cushion plate (8), a positioning plate (9) and a lower die sleeve (10) are sequentially fixedly connected to the lower die from bottom to top, a punch (11) is fixed to the upper die and is in sliding fit with the elastic body (5) and the stripper plate (6), the lower die is provided with a die core (12) and a lower movable die (13) capable of vertically sliding, the lower bottom surface of the punch (11), the lower movable die (13) and the die core (12) encircle to form a stamping cavity (23) for latches, and the lower movable die (13) is connected with an ejector mechanism. By the aid of the hot stamping die for latches, each latch can be formed by means of one-step processing, and production efficiency is greatly improved.
Description
Technical field
The present invention relates to field of machining and machinebuilding technology, specifically is the snap close hot stamping die.
Background technology
Snap close is a kind of button firmware that is applied in the plant equipment, and the structural representation of the snap close shown in accompanying drawing 3, accompanying drawing 4 can know that snap close is a hexgonal structure; The centre be provided with manhole with along circumferential equally distributed six grooves of manhole, existing snap close adopts casting to shape, and needs that heating makes it to be fused into liquid to metal material earlier; In mould, be shaped liquid casting of metals then; Obtain blank, again to blank cut, a series of following process such as polishing, heat treatment, just can make product precision, intensity satisfy instructions for use; Such mode need be carried out multiple working procedure processing; Can not once-forming, process more loaded down with trivial detailsly, make production efficiency lower.
Summary of the invention
Technical problem to be solved by this invention is, the snap close hot stamping die that can time processing be shaped is provided.
For solving the problems of the technologies described above; Snap close hot stamping die provided by the invention; Comprise patrix and counterdie, patrix be fixedly connected sequentially from top to bottom die shank, top mold frame, upper die plate, fixed head, elastomer and stripper plate, counterdie be fixedly connected sequentially down from bottom to up mould bases, counterdie backing plate, location-plate and lower die-sleeve; Be fixed with drift in first shoulder hole that described stripper plate, elastomer and fixed head three constitute; Drift and elastomer, stripper plate are slidingly matched, be provided with core rod in second shoulder hole that described lower die-sleeve and location-plate constitute, slidably descend dynamic model, the cross section of described drift be shaped as hexagon; The edge of the bottom surface of drift is provided with knuckle, and the bottom surface of drift is provided with cylindrical bump; Core rod is provided with through hole; The cross section of the through hole of core rod be shaped as hexagon; The through hole of following dynamic model and core rod is slidingly matched; The cross section of following dynamic model be shaped as hexagon, the upper bottom surface of following dynamic model is provided with cylindrical bump, the edge and the cylindrical bump of following dynamic model are equipped with knuckle; That is to say down the edge of dynamic model, down the cylindrical bump of dynamic model upper bottom surface, the junction of cylindrical bump and the upper bottom surface of following dynamic model of dynamic model is equipped with knuckle down, the upper bottom surface edge of the cylindrical bump of following dynamic model is provided with circumferential equally distributed six salient points radially; The bottom surface of drift, following dynamic model and core rod three surround the punching press die cavity that forms snap close, and following dynamic model is connected with ejecting mechanism.
After adopting above structure, the present invention compared with prior art has following advantage:
Utilize the snap close hot stamping die, can process snap close, earlier raw material are heated through the mode of drop stamping; After being heated to uniform temperature, be placed in down raw material on the dynamic model, the stressed patrix integral body that makes of die shank moves down then; Lead by guiding mechanism in the process that patrix moves down, when the upper bottom surface exposure phase of the bottom surface of patrix and counterdie supports, because die shank continues stressed pressing down; Elastomer is stressed to be compressed, this moment drift and elastomer, stripper plate sliding fit, drift continues stressed downward punching press; Drift and following dynamic model, the raw material that are put in down on the dynamic model compress, and dynamic model and raw material are pressed in the core rod under the punch holder, and the bottom surface of drift, time dynamic model and core rod three surround the punching press die cavity that forms snap close at this moment; Make raw material once strike out the shape of snap close, and the product strength that obtains after the drop stamping is high, punching formation property is good; Precision is high, need not carry out following process, has improved production efficiency.
As improvement, described ejecting mechanism is meant down that the dynamic model bottom surface is connected with push rod, and capping is fixed in through the push rod fixed head in the push rod lower end; The push rod fixed head is connected with an end of extension spring, and the other end of extension spring is connected with following mould bases, when the drift punching press is accomplished; Following dynamic model is pressed in the through hole of core rod; At this moment extension spring makes the push rod fixed head receive pulling force upwards, and the push rod fixed head makes down dynamic model receive thrust upwards through push rod, when the mould die sinking; Following dynamic model is made to place down the snap close that is shaped on the dynamic model to be removed because the thrust of push rod ejects.
As further improvement; Described dynamic model bottom surface down is connected with an end of stage clip, and the other end of stage clip is connected with the counterdie backing plate, and is stressed steady when stage clip can make down dynamic model by the drift punching press; Play a cushioning effect; When die sinking, stage clip also can make down dynamic model receive a thrust that makes progress, and dynamic model is ejected more easily.
As further improving; Be fixedly connected sequentially from top to bottom die shank, top mold frame, upper die plate, fixed head, elastomer and stripper plate of described patrix is meant that stripper plate, elastomer, fixed head, upper die plate and top mold frame are fixedly connected sequentially through the combined screw that can slide up and down; Be fixedly connected sequentially through the patrix securing member between top mold frame, upper die plate and the fixed head; The die shank lower end is fixed on the top mold frame; Described combined screw comprises two sleeve pipes that can slide relatively, is fixed with first sleeve pipe of combined screw on the top mold frame, and stripper plate, elastomer, fixed head, upper die plate are connected by second sleeve pipe of combined screw; Two sleeve pipes are slidingly connected and can not break off; Second sleeve pipe of combined screw can upwards slide when elastomer compresses, can be when elastomer recovers to lower slider, and first sleeve pipe can not break off with first sleeve pipe; Guarantee that elastomer can be fixedly connected with stripper plate, fixed head all the time when being compressed, and this combined screw is simple in structure, long service life, not fragile.
As further improving again; Be provided with guiding mechanism between the described upper die and lower die; Cooperate the realization guiding with the guide pillar that is fixedly installed on down the mould bases both sides through the guide pin bushing that is fixedly installed on the top mold frame both sides between the upper die and lower die, when the drift punching press, guide pillar slides up and down in the through hole of guide pin bushing; Upper die and lower die are play the guiding role, and drift can sideslip when making punching press.
Description of drawings
Fig. 1 is the structural representation of snap close hot stamping die of the present invention;
Structural representation when Fig. 2 is snap close hot stamping die discharging of the present invention;
Fig. 3 is the plan structure sketch map of the snap close of snap close hot stamping die production of the present invention;
Fig. 4 is the longitudinal sectional view of Fig. 3.
Wherein, 1, die shank; 2, top mold frame; 3, upper die plate; 4, fixed head; 5, elastomer; 6, stripper plate; 7, following mould bases; 8, counterdie backing plate; 9, location-plate; 10, lower die-sleeve; 11, drift; 12, core rod; 13, following dynamic model; 14, push rod; 15, push rod fixed head; 16, capping; 17, following mould bases; 18, stage clip; 19, combined screw; 20, patrix securing member; 21, guide pin bushing; 22, guide pillar; 23, punching press die cavity.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done explanation in further detail.
Structural representation by Fig. 1, snap close hot stamping die of the present invention shown in Figure 2 can be known; It comprises patrix and counterdie; Patrix be fixedly connected sequentially from top to bottom die shank 1, top mold frame 2, upper die plate 3, fixed head 4, elastomer 5 and stripper plate 6; Counterdie be fixedly connected sequentially down from bottom to up mould bases 7, counterdie backing plate 8, location-plate 9 and lower die-sleeve 10; Be fixed with drift 11 in first shoulder hole that described stripper plate 6, elastomer 5 and fixed head 4 threes constitute, first shoulder hole is meant that elastomer 5 and stripper plate 6 are provided with the consistent through hole of continuous diameter here, the through hole on the fixed head 4 by about two parts form; The lower part through-hole diameter is consistent with the through hole of elastomer 5 and continuous; The diameter of top through hole links to each other greater than the diameter of lower part through hole and with the lower part through hole, first shoulder hole cavity in be provided with the drift 11 consistent with the first shoulder hole shape, drift 11 is slidingly matched with elastomer 5, stripper plate 6; Be provided with core rod 12 in both second shoulder holes of constituting of described lower die-sleeve 10 and location-plate 9, slidably descend dynamic model 13; Here second shoulder hole is meant that the diameter of through hole of lower die-sleeve 10 is consistent with the through hole of stripper plate 6, and the diameter of the through hole of location-plate 9 is greater than the diameter of the through hole of lower die-sleeve 10, being shaped as and the snap close hexagon of the same size of cross section of described drift 11; The edge of the bottom surface of drift 11 is provided with knuckle, and the center of the bottom surface of drift 11 is provided with the cylindrical bump consistent with the hole size of snap close; Core rod 12 is provided with through hole; Being shaped as and snap close hexagon of the same size of the cross section of the through hole of core rod 12; Following dynamic model 13 is slidingly matched with the through hole of core rod 12; Being shaped as and snap close hexagon of the same size of the cross section of following dynamic model 13, the upper bottom surface center of following dynamic model 13 is provided with the cylindrical bump consistent with the hole size of snap close, and the edge and the cylindrical bump of following dynamic model 13 are equipped with knuckle; The junction that is to say down the upper bottom surface of the edge of dynamic model 13, the upper bottom surface edge that descends the cylindrical bump of dynamic model 13, the cylindrical bump that descends dynamic model 13 and following dynamic model 13 is equipped with knuckle; The upper bottom surface edge of the cylindrical bump of following dynamic model 13 is provided with circumferentially equally distributed six salient points radially, and is as shown in Figure 3, and radially salient point is corresponding with six breach on the snap close through hole; The bottom surface of drift 11, following dynamic model 13 surround the punching press die cavity 23 that forms snap close with core rod 12 threes, and following dynamic model 13 is connected with ejecting mechanism.
Described ejecting mechanism is meant down that the bottom surface of dynamic model 13 is connected with the upper end of push rod 14, and capping 16 is fixed in through push rod fixed head 15 in the lower end of push rod 14, and push rod fixed head 15 is connected with an end of extension spring 17, and the other end of extension spring 17 is connected with following mould bases 7.
Described dynamic model bottom surface down is connected with an end of stage clip 18, and the other end of stage clip 18 is connected with counterdie backing plate 8.
The described patrix die shank 1, top mold frame 2, upper die plate 3, fixed head 4, elastomer 5 that be fixedly connected sequentially from top to bottom is meant that with stripper plate 6 stripper plate 6, elastomer 5, fixed head 4, upper die plate 3 are fixedly connected sequentially through the combined screw 19 that can slide up and down with top mold frame 2; Be fixedly connected sequentially through patrix securing member 20 between top mold frame 2, upper die plate 3 and the fixed head 4; Die shank 1 lower end is fixed on the top mold frame 2; Described combined screw 19 comprises two sleeve pipes that can slide relatively; Be fixed with first sleeve pipe of combined screw 19 on the top mold frame 2; Stripper plate 6, elastomer 5, fixed head 4, upper die plate 3 are connected by second sleeve pipe of combined screw 19, and two sleeve pipes are slidingly connected and can not break off, and second sleeve pipe of combined screw 19 can upwards slide when elastomer 5 compressions; Can be when elastomer 5 recovers to lower slider, first sleeve pipe can not break off with first sleeve pipe.
Be provided with guiding mechanism between the described upper die and lower die, cooperate the realization guiding with the guide pillar 22 that is fixedly installed on down mould bases 7 both sides through the guide pin bushing 21 that is fixedly installed on top mold frame 2 both sides between the upper die and lower die.
Described elastomer 5 is a rubber.
The step of utilizing snap close hot stamping die of the present invention to produce snap close is:
Earlier seamless steel pipe is cut off blanking, the blank behind the blanking is heated to austenitic state, be placed in down the blank after the heating on the dynamic model 13 then; Start the punch press that links to each other with die shank 1 then; The stressed downward punching press of patrix, this moment, guide pillar 22 cooperated the realization guiding with guide pin bushing 21, when the bottom surface of patrix contacts with the upper bottom surface of counterdie; Because elastomer is stressed to be compressed; This moment drift 11 with elastomer 5, stripper plate 6 sliding fits, drift 11 continues downward punching press, blank is pressed in the through hole of core rod 12 with following dynamic model 13 by drift 11; This moment, bottom surface and following dynamic model 13, core rod 12 threes of drift 11 surrounded the punching press die cavity that forms the formation snap close, at this moment state as shown in Figure 1; Make blank be stamped into the shape of snap close, drift 11 backhauls then, the following dynamic model 13 of snap close that is placed with shaping is owing to receive the through hole that the thrust of push rod 14 is ejected core rod 12, this moment state as shown in Figure 2; Take off the snap close of drawing then, buckle structure such as Fig. 3, shown in Figure 4; Accomplish the drop stamping of snap close, carry out punching press next time in regular turn.
Below only use preferable instance with regard to the present invention and made explanation, but can not be interpreted as it is the restriction to claim, structure of the present invention can have other variations, is not limited to said structure.In a word, all various variations of in the protection domain of independent claims of the present invention, being done are all in protection scope of the present invention.
Claims (5)
1. snap close hot stamping die; It comprises patrix and counterdie; Patrix be fixedly connected sequentially from top to bottom die shank (1), top mold frame (2), upper die plate (3), fixed head (4), elastomer (5) and stripper plate (6); Counterdie be fixedly connected sequentially down from bottom to up mould bases (7), counterdie backing plate (8), location-plate (9) and lower die-sleeve (10); Be fixed with drift (11) in first shoulder hole that described stripper plate (6), elastomer (5) and fixed head (4) three constitute; Drift (11) and elastomer (5), stripper plate (6) are slidingly matched, and are provided with core rod (12), the dynamic model that can slide up and down down (13) in both second shoulder holes of constituting of described lower die-sleeve (10) and location-plate (9), it is characterized in that: the cross section of described drift (11) be shaped as hexagon; The edge of the bottom surface of drift (11) is provided with knuckle, and the bottom surface of drift (11) is provided with cylindrical bump; Core rod (12) is provided with through hole; The cross section of the through hole of core rod (12) be shaped as hexagon; The through hole of following dynamic model (13) and core rod (12) is slidingly matched, the cross section of following dynamic model (13) be shaped as hexagon, the upper bottom surface of following dynamic model (13) is provided with cylindrical bump; The edge and the cylindrical bump of following dynamic model (13) are equipped with knuckle, and the upper bottom surface edge of the cylindrical bump of following dynamic model (13) is provided with circumferentially equally distributed six salient points radially; The bottom surface of drift (11), following dynamic model (13) surround the punching press die cavity (23) that forms snap close with core rod (12) three, and following dynamic model (13) is connected with ejecting mechanism.
2. snap close hot stamping die according to claim 1; It is characterized in that: described ejecting mechanism is meant down that the bottom surface of dynamic model (13) is connected with the upper end of push rod (14); Capping (16) is fixed in through push rod fixed head (15) in the lower end of push rod (14); Push rod fixed head (15) is connected with an end of extension spring (17), and the other end of extension spring (17) is connected with following mould bases (7).
3. snap close hot stamping die according to claim 1 and 2 is characterized in that: described dynamic model bottom surface down is connected with an end of stage clip (18), and the other end of stage clip (18) is connected with counterdie backing plate (8).
4. snap close hot stamping die according to claim 1; It is characterized in that: be fixedly connected sequentially from top to bottom die shank (1), top mold frame (2), upper die plate (3), fixed head (4), elastomer (5) of described patrix is meant that with stripper plate (6) stripper plate (6), elastomer (5), fixed head (4), upper die plate (3) are fixedly connected sequentially through the combined screw that can slide up and down (19) with top mold frame (2); Be fixedly connected sequentially through patrix securing member (20) between top mold frame (2), upper die plate (3) and the fixed head (4), die shank (1) lower end is fixed on the top mold frame (2).
5. snap close hot stamping die according to claim 1; It is characterized in that: be provided with guiding mechanism between the described upper die and lower die, cooperate with the guide pillar (22) that is fixedly installed on down mould bases (7) both sides through the guide pin bushing (21) that is fixedly installed on top mold frame (2) both sides and realize guiding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210087710.3A CN102632142B (en) | 2012-03-29 | 2012-03-29 | Hot stamping die for latches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210087710.3A CN102632142B (en) | 2012-03-29 | 2012-03-29 | Hot stamping die for latches |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102632142A true CN102632142A (en) | 2012-08-15 |
| CN102632142B CN102632142B (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210087710.3A Expired - Fee Related CN102632142B (en) | 2012-03-29 | 2012-03-29 | Hot stamping die for latches |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102806242A (en) * | 2012-08-24 | 2012-12-05 | 宁波市鄞州剑均机械科技有限公司 | Hot-extrusion die of axial copper lock body |
| CN102814404A (en) * | 2012-08-24 | 2012-12-12 | 宁波市鄞州剑均机械科技有限公司 | Drawing die used for manufacturing axial lock housing |
| CN104028687A (en) * | 2013-03-07 | 2014-09-10 | 江苏龙城精锻有限公司 | High-pressure common rail system oil injecting nozzle block forming die |
| CN105772596A (en) * | 2014-12-22 | 2016-07-20 | 遵义市利升机械加工有限公司 | One-time forming device for aviation contactor inserting pin |
| CN106216473A (en) * | 2016-08-02 | 2016-12-14 | 无锡尊宝电动车有限公司 | A kind of electrical accessorie punch for manufacturing with automatic ejection function |
| CN108421901A (en) * | 2018-05-15 | 2018-08-21 | 周焱春 | A kind of lock hot stamping die |
| CN108543860A (en) * | 2018-05-15 | 2018-09-18 | 周焱春 | A kind of lock drop stamping technique |
| CN109261969A (en) * | 2018-09-28 | 2019-01-25 | 贵州新安航空机械有限责任公司 | Powder metallurgy product hot pressing mode structure |
| CN109317564A (en) * | 2018-12-06 | 2019-02-12 | 上海威可特汽车热交换器制造有限公司 | A kind of various types of vehicle intercooler side plate mould structures of production |
| CN109514765A (en) * | 2018-09-30 | 2019-03-26 | 江西省天奇汽车零部件有限公司 | A kind of mould optimization structure |
| CN113814330A (en) * | 2021-07-27 | 2021-12-21 | 襄阳汽车轴承股份有限公司 | Cutting die for automatic production line of basket-shaped retainer punching |
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| JPS5671536A (en) * | 1979-11-15 | 1981-06-15 | Mitsubishi Electric Corp | Stocking device for blanking product |
| CN101767143A (en) * | 2009-12-31 | 2010-07-07 | 王瑞峰 | One-off edge cutting device |
| CN101829742A (en) * | 2010-04-30 | 2010-09-15 | 徐州中部矿山设备有限公司 | Device for stamping steel retaining ring |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814404A (en) * | 2012-08-24 | 2012-12-12 | 宁波市鄞州剑均机械科技有限公司 | Drawing die used for manufacturing axial lock housing |
| CN102806242B (en) * | 2012-08-24 | 2015-01-07 | 宁波市鄞州剑均机械科技有限公司 | Hot-extrusion die of axial copper lock body |
| CN102814404B (en) * | 2012-08-24 | 2015-04-15 | 宁波市鄞州剑均机械科技有限公司 | Drawing die used for manufacturing axial lock housing |
| CN102806242A (en) * | 2012-08-24 | 2012-12-05 | 宁波市鄞州剑均机械科技有限公司 | Hot-extrusion die of axial copper lock body |
| CN104028687A (en) * | 2013-03-07 | 2014-09-10 | 江苏龙城精锻有限公司 | High-pressure common rail system oil injecting nozzle block forming die |
| CN105772596B (en) * | 2014-12-22 | 2018-02-13 | 遵义市利升机械加工有限公司 | A kind of disposal molding device of aviation contactor pin |
| CN105772596A (en) * | 2014-12-22 | 2016-07-20 | 遵义市利升机械加工有限公司 | One-time forming device for aviation contactor inserting pin |
| CN106216473B (en) * | 2016-08-02 | 2018-06-05 | 中山胜祥金属制品有限公司 | A kind of electrical accessorie punch for manufacturing with automatic ejection |
| CN106216473A (en) * | 2016-08-02 | 2016-12-14 | 无锡尊宝电动车有限公司 | A kind of electrical accessorie punch for manufacturing with automatic ejection function |
| CN108421901A (en) * | 2018-05-15 | 2018-08-21 | 周焱春 | A kind of lock hot stamping die |
| CN108543860A (en) * | 2018-05-15 | 2018-09-18 | 周焱春 | A kind of lock drop stamping technique |
| CN108421901B (en) * | 2018-05-15 | 2019-05-07 | 东莞市瑞凯模具有限公司 | A kind of lock hot stamping die |
| CN108543860B (en) * | 2018-05-15 | 2019-10-25 | 泰州市海陵区震泽机械制造有限公司 | A kind of lock drop stamping technique |
| CN109261969A (en) * | 2018-09-28 | 2019-01-25 | 贵州新安航空机械有限责任公司 | Powder metallurgy product hot pressing mode structure |
| CN109514765A (en) * | 2018-09-30 | 2019-03-26 | 江西省天奇汽车零部件有限公司 | A kind of mould optimization structure |
| CN109514765B (en) * | 2018-09-30 | 2021-01-15 | 江西省天奇汽车零部件有限公司 | Mould optimization structure |
| CN109317564A (en) * | 2018-12-06 | 2019-02-12 | 上海威可特汽车热交换器制造有限公司 | A kind of various types of vehicle intercooler side plate mould structures of production |
| CN109317564B (en) * | 2018-12-06 | 2024-03-01 | 上海威可特汽车热交换器制造有限公司 | Automobile intercooler sideboard mould structure of multiple model of production |
| CN113814330A (en) * | 2021-07-27 | 2021-12-21 | 襄阳汽车轴承股份有限公司 | Cutting die for automatic production line of basket-shaped retainer punching |
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| Publication number | Publication date |
|---|---|
| CN102632142B (en) | 2014-07-23 |
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