CN107838289A - A kind of special-shaped workpiece processing mold - Google Patents

A kind of special-shaped workpiece processing mold Download PDF

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Publication number
CN107838289A
CN107838289A CN201711007915.5A CN201711007915A CN107838289A CN 107838289 A CN107838289 A CN 107838289A CN 201711007915 A CN201711007915 A CN 201711007915A CN 107838289 A CN107838289 A CN 107838289A
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CN
China
Prior art keywords
hole
mould
processing
lower mould
station
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Granted
Application number
CN201711007915.5A
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Chinese (zh)
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CN107838289B (en
Inventor
陈钦煌
陈先鸽
周月顺
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Wenzhou Peng Peng Machinery Co Ltd
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Wenzhou Peng Peng Machinery Co Ltd
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Priority to CN201711007915.5A priority Critical patent/CN107838289B/en
Publication of CN107838289A publication Critical patent/CN107838289A/en
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Publication of CN107838289B publication Critical patent/CN107838289B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/08Dies with different parts for several steps in a process
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003Positioning devices

Abstract

The present invention relates to a kind of special-shaped workpiece processing mold,Including upper mould,Guide pillar between lower mould and upper mould and lower mould,Between lower mould and upper mould several machining positions are disposed with along metal tape transmission direction,Each machining position is provided with corresponding punch assembly,One of punch assembly includes central part and is in the outer portion of discount vibram outlet shape around central part and horizontal cross-section,Main processing hole is vertically provided with the middle part of central part,Central part is towards the end face of upper mould with the direction arc-shaped bend gradually downward away from processing hole,Lower mould is provided with the deformation hole being adapted with outer portion shape around outer portion,Lower mould is located at the de- material return unit for being provided with below outer portion and supplying the deformation de- material chamber of lower mould vertical lifting and resetting outer portion upwards,Upper mould is provided with the first processing seat,First processing seat is provided with bending hole and hole machined block,And periphery is adapted with the inner circumferential shape in deformation hole.Using such scheme, the present invention provides a kind of special-shaped workpiece processing mold for reducing station, improving precision, reducing processing cost.

Description

A kind of special-shaped workpiece processing mold
Technical field
The present invention relates to a kind of mould, and in particular to a kind of special-shaped workpiece processing mold.
Background technology
Mould, be in industrial production being molded, being blow molded, extruding, die casting or obtain the methods of forging forming, smelting, punching press To the various moulds and instrument of required product.
As shown in figure 1, this kind of special-shaped workpiece includes discoidal main body 4, the edge of main body 4 is provided with rectangular indentation 41, main The middle part of body 4 is provided with centre bore 42 and the central cylinder 43 around centre bore 42, and main body 4 is provided with circle around central cylinder 43 The bending groove 44 of shape is lacked, main body is additionally provided with two circular 45, rectangular openings 46 of side neck body and rectangle bending, and processes this kind The mould of special-shaped workpiece is stamping die, in processing, is first deployed coiled metal tape cooperation, then by transmission mechanism by metal Band is transferred through between lower mould and lower mould, and traditional impact style needs nearly ten stations to add this kind of special-shaped workpiece successively Work, or several stamping dies are process successively, on the one hand, the processing mode of single mold multistation add mould volume and Length, adds the processing cost and space-consuming of mould, and traditional positioning method is made using the accurate delivery of transmission mechanism Workpiece reaches specified Working position, but transmission mechanism transmits accuracy and can declined after long-time use, excessive station Being gradually reduced for precision can be caused, on the other hand, the processing mode such as processed successively according to multi-mould, with the use of drilling machine etc. Other auxiliary equipments are to reduce the processing cost of station quantity and mould, but the workpiece after being dismounted for multiple times processing, influence essence Degree factor quantity greatly increases, and causes precision to have obvious reduction.
The content of the invention
In view of the deficienciess of the prior art, reduce station it is an object of the invention to provide one kind, improve precision, reduction The special-shaped workpiece processing mold of processing cost.
To achieve the above object, the invention provides following technical scheme:Including between upper die and lower die and upper mould and lower mould Guide pillar, be disposed with several machining positions along metal tape transmission direction between described lower mould and upper mould, it is each described plus Station is provided with corresponding punch assembly, it is characterised in that:Punch assembly described in one of them includes central part and surrounded Central part and horizontal cross-section are in the outer portion of discount vibram outlet shape, main processing hole are vertically provided with the middle part of described central part, in described Towards the end face of upper mould, with the direction away from main processing hole, arc-shaped bend, described lower mould are set center portion around outer portion gradually downward The deformation hole being adapted with outer portion shape is equipped with, described lower mould, which is located at below outer portion, to be provided with for lower mould vertical lifting Deformation de- material chamber and the de- material return unit for resetting outer portion upwards, described upper mould are provided with the first processing seat, and described One processing seat is provided with is correspondingly arranged on the bending hole being adapted with central part shape, the described first processing seat with central part The hole machined block being adapted with deformation hole shape, the periphery and deformation hole of the described first processing seat are set in the middle part of bending hole Inner circumferential shape is adapted.
By using above-mentioned technical proposal, mould is typically applied in combination with metal tape transport system and upper mould lowering or hoisting gear, Centre bore, a shaping of central cylinder, the secondary reshaping of central cylinder and the processing of bending groove are concentrated on into a station, greatly It is big to reduce station quantity, at the same reduce because station excessively caused by precise decreasing, processing efficiency be low, high processing costs, accounts for With space it is big the problems such as, during the decline of upper mould, hole machined block first can contact with metal tape and go out centre bore, then centre bore Neighbouring material can be contacted with the part of central part arc-shaped bend, until being bonded in bending hole inwall, is gradually gently processed into Metal is continued to press in bending hole by central cylinder, the first processing seat, metal tape bending groove is occurred, due to central part bending During forming cylinder, the workpiece in processing can be stuck because of frictional force with central part outer wall, and de- material return unit is by outer shroud Portion deviates from workpiece while reset from central part outer wall, is easy to metal tape to transmit to next station and continues to process, and The arc-shaped bend of center end surface makes the spacing of workpiece and central part gradually increase, and accelerates eliminating efficiency.
The present invention is further arranged to:Described lower mould is located at each machining position and is respectively arranged with more than two mould positioning Hole, described upper mould are vertically provided with guide rod and sliding and are limited in the upper mobile board of guide rod, described upper mould and upper activity The portable plate return unit for resetting upper mobile board downwards is provided between plate, described upper mobile board is corresponding with each mould positioning hole to be set Locating rod is equipped with, described locating rod lower end is provided with to be fixed in round table-like correcting block, the larger end of described correcting block Locating rod, for small end towards lower mould, described upper front end of the mould opposing metallic with transmission direction is provided with hole drift, described Lower mould is correspondingly arranged on positioning processing hole with each hole drift, and the arrangement for the through hole that described hole drift is gone out in metal tape is determined with mould Position hole is identical with respect to the arrangement of place station.
By using above-mentioned technical proposal, mould positioning hole is set up, is easy to locating rod to pass through added on the waste material of metal tape The through hole of work, each time process before all re-start one-time positioning, improve the accuracy of processing, due to locating rod quantity compared with More, its position stability is preferable, and it is adjacent between locating rod aligning, school position again can be carried out by metal tape, in addition, fixed Position bar when contacting soon correcting block can first contacting metal band, through hole of the guiding locating rod into metal tape.
The present invention is further arranged to:Described lower mould is relative to be provided with cut-out hole along the end of metal tape transmission direction, The spacing in described cut-out hole is adapted with metal strip edge with the spacing of finished product excision position, and described upper mobile board is with respectively cutting Disconnected hole is correspondingly arranged on cutoff tool.
By using above-mentioned technical proposal, the metal tape after punching press is segmented by cutoff tool, is easy to waste recovery, rationally The through hole formed using processing, metal tape can be segmented by cutting off spacing a small amount of between through hole and metal strip edge, simplify knot Accelerate cut-out efficiency while structure.
The present invention is further arranged to:Described lower mould is set respectively along metal tape transmission direction and positioned at metal tape both sides Have a floating stability column, described lower mould be located at be provided with below floating stability column for floating stability column vertical lifting flotation chamber and The floating return unit that floating stability column is resetted upwards, described floating stability column periphery are provided with metal strip edge is spacing Stopper slot.
By using above-mentioned technical proposal, because central part and outer portion are in an initial condition outer gibbosity, floating is set up Stability column, avoid central part and outer portion from hindering metal tape transmission, and when upper mould is processing decline, make metal tape steadily synchronous Decline, avoid tilting because of processing extruding, ensure the crudy of finished product.
The present invention is further arranged to:Described lower mould is disposed with the first station, second along metal tape transmission direction Station, 3rd station and the 4th station, described central part and outer portion are located at the first station of lower mould, and described lower mould is located at Second station is provided with interior rectangle processing hole and U-shaped processing hole, and described upper mould and rectangle processing hole and U-shaped processing hole are right respectively Rectangular punch and U-shaped drift should be provided with, described lower mould is located at 3rd station and is provided with two circular processing holes, edge rectangles Process hole and the bending rectangle corresponding with U-shaped processing hole processes hole, described upper mould is processed with circular processing hole, edge rectangle Hole and bending rectangle processing hole are correspondingly arranged on round punch, edge rectangular punch and Bending punch, described lower mould position respectively It is provided with the 4th station and is correspondingly arranged on blanking with charging conduit with workpiece outer contour shape identical charging conduit, described upper mould Drift, described lower mould are located at UNICOM below charging conduit and are provided with tapping channel.
By using above-mentioned technical proposal, by four stations of manufacture simplification of nearly ten stations originally, reduce station significantly Quantity, while reduce because station excessively caused by precise decreasing, processing efficiency be low, high processing costs, space-consuming are big etc. Problem, single station by reasonably arranging while processing three to needing Working position everywhere, by central part and outer portion arrange to First station, follow-up processing will not be arrived by ensureing the Extensive orthopedic of the first station, ensure more outstanding crudy.
The invention will be further described with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the stereogram of special-shaped workpiece;
Fig. 2 is the stereogram one of the specific embodiment of the invention;
Fig. 3 is the enlarged drawing of A in Fig. 2;
Fig. 4 is the stereogram two of the specific embodiment of the invention;
Fig. 5 is the enlarged drawing of B in Fig. 3;
Fig. 6 is the stereogram of the first processing seat in the specific embodiment of the invention;
Fig. 7 is the side structure schematic view of lower mould in the specific embodiment of the invention.
Embodiment
As shown in Fig. 2-Fig. 7, the invention discloses a kind of special-shaped workpiece processing mold, including upper mould 1, lower mould 2 and upper mould Guide pillar 3 between 1 and lower mould 2, several machining positions are disposed with along metal tape transmission direction between lower mould 2 and upper mould 1, respectively Machining position is provided with corresponding punch assembly, and one of punch assembly includes central part 25 and around central part 25 and level Section is in the outer portion 26 of discount vibram outlet shape, and the middle part of central part 25 is vertically provided with main processing hole 251, and central part 25 is towards upper mould 1 With the direction away from main processing hole 251, arc-shaped bend, lower mould 2 are provided with and outer portion 26 around outer portion 26 gradually downward for end face The deformation hole 27 that shape is adapted, lower mould 2 are located at the lower section of outer portion 26 and are provided with the deformation de- material chamber for supplying the lower vertical lifting of mould 2 261 and the de- material return unit 262 that resets outer portion 26 upwards, the preferred compressed of de- material return unit 262 is in deformation de- material chamber 261 Cylindrical spring, upper mould 1 are provided with the first processing seat 11, and the first processing seat 11 is provided with to be correspondingly arranged on and center with central part 25 The bending hole 111 that the shape of portion 25 is adapted, the first processing seat 11 are located at the setting of the middle part of bending hole 111 and mutually fitted with the shape of deformation hole 27 The hole machined block 112 matched somebody with somebody, the periphery of the first processing seat 11 is adapted with the inner circumferential shape in deformation hole 27, by centre bore, central tube A shaping, the secondary reshaping of central cylinder and the processing of bending groove of body concentrate on a station, and station number is greatly reduced Amount, at the same reduce because station excessively caused by precise decreasing, processing efficiency be low, high processing costs, big space-consuming the problems such as, During the decline of upper mould 1, hole machined block 112 can first contact with metal tape and go out centre bore, then the material near centre bore It can be contacted with the part of the arc-shaped bend of central part 25, until being bonded in the inwall of bending hole 111, be gradually gently processed into central tube Metal is continued to press in bending hole 111 by body, the first processing seat 11, metal tape bending groove is occurred, due to the folding of central part 25 Bending is into during cylinder, and the workpiece in processing can be stuck because of frictional force with the outer wall of central part 25, and de- material return unit 262 exists Workpiece is deviate from from the outer wall of central part 25 while outer portion 26 is resetted, is easy to metal tape to transmit to next station and continues Processing, and the arc-shaped bend of the end face of central part 25 makes the spacing of workpiece and central part 25 gradually increase, and accelerates eliminating efficiency.
Lower mould 2 is located at each machining position and is respectively arranged with more than two mould positioning holes 28, and upper mould 1 is vertically provided with guide rod 12 and slide and be limited in the upper mobile board 13 of guide rod 12, be provided between upper mould 1 and upper mobile board 13 by upper mobile board 13 to The portable plate return unit 15 of lower reset, portable plate return unit 15 are the cylindrical spring being compressed between mould 1 and upper mobile board 13, Upper mobile board 13 is correspondingly arranged on locating rod 14 with each mould positioning hole 28, and the lower end of locating rod 14 is provided with round table-like correcting block 141, locating rod 14 is fixed at the larger end of correcting block, small end towards lower mould 2, the upper opposing metallic of mould 1 with transmission direction most Front end is provided with hole drift 16, and lower mould 2 is correspondingly arranged on positioning processing hole 161 with each hole drift 16, and hole drift 16 is in metal tape The arrangement for the through hole gone out is identical with respect to the arrangement of place station with mould positioning hole 28, sets up mould positioning hole 28, is easy to locating rod 14, through the through hole processed on the waste material of metal tape, one-time positioning are all re-started before processing each time, improves and adds The accuracy of work, because the quantity of locating rod 14 is more, its position stability is preferable, and it is adjacent between locating rod 14 can pass through gold Category band carry out again aligning, school position, in addition, when locating rod 14 contact soon correcting block can first contacting metal band, guiding locating rod 14 enter the through hole of metal tape.
The relative spacing and metal tape that the end of metal tape transmission direction is provided with cut-out hole 29, cuts off hole 29 of lower mould 2 Edge is adapted with the spacing of finished product excision position, and upper mobile board 13 is correspondingly arranged on cutoff tool 17 with each cut-out hole 29, cuts off Metal tape after punching press is segmented by knife 17, is easy to waste recovery, the through hole rationally formed using processing, excision through hole and gold A small amount of spacing can be segmented metal tape between category belt edge, accelerate cut-out efficiency while simplifying structure.
Lower mould 2 is respectively arranged with floating stability column 20 along metal tape transmission direction and positioned at metal tape both sides, and lower mould 2 is located at The lower section of floating stability column 20 is provided with for the flotation chamber 201 of the vertical lifting of floating stability column 20 and floating stability column 20 is multiple upwards The floating return unit 202 of position, the periphery of floating stability column 20 is provided with the spacing stopper slot 203 of metal strip edge, due to center Portion 25 and outer portion 26 are in an initial condition outer gibbosity, set up floating stability column 20, avoid central part 25 and outer portion 26 from hindering Hinder metal tape to transmit, and when upper mould 1 is processing decline, metal tape is steadily synchronously declined, avoid tilting because of processing extruding, Ensure the crudy of finished product.
Lower mould 2 is disposed with the first station 21, second station 22,3rd station 23 and the 4th along metal tape transmission direction Station 24, central part 25 and outer portion 26 are located at the first station 21 of lower mould 2, and lower mould 2 is located at second station 22 and is provided with internal moment Shape processing hole 221 and U-shaped processing hole 222, upper mould 1 are correspondingly arranged on interior respectively with rectangle processing hole 221 and U-shaped processing hole 222 Rectangular punch and U-shaped drift, interior rectangular punch and U-shaped drift are existing component, and concentrate the second processing seat for being installed on mould 1 18, it is not specifically shown, lower mould 2 be located at 3rd station 23 be provided with two circular processing holes 231, edge rectangle processing hole 233 and The bending rectangle corresponding with U-shaped processing hole 222 processes hole 232, upper mould 1 and circular processing hole 231, edge rectangle processing hole 233 and bending rectangle processing hole 232 be correspondingly arranged on round punch, edge rectangular punch and Bending punch respectively, round punch, Edge rectangular punch and Bending punch are existing component, and concentrate the 3rd processing seat 19 for being installed on mould 1, not specifically shown, Lower mould 2 be located at the 4th station 24 be provided with workpiece outer contour shape identical charging conduit 241, upper mould 1 is corresponding with charging conduit to be set Blanking die 10 is equipped with, lower mould 2 is located at UNICOM below charging conduit and is provided with tapping channel 101, by adding for nearly ten stations of script Work simplify four stations, significantly reduce station quantity, while reduce because station excessively caused by precise decreasing, processing efficiency The problems such as low, high processing costs, big space-consuming, single station is by reasonably arranging while processing three to needing machining position everywhere Put, central part 25 and outer portion 26 are arranged to the first station 21, ensureing the Extensive orthopedic of the first station 21 will not arrive subsequently Processing, ensure more outstanding crudy.

Claims (5)

1. the guide pillar between a kind of special-shaped workpiece processing mold, including upper die and lower die and upper mould and lower mould, described lower mould with it is upper Several machining positions are disposed with along metal tape transmission direction between mould, each described machining position is provided with corresponding punching press Component, it is characterised in that:Punch assembly described in one of them includes central part and is in discount vibram outlet around central part and horizontal cross-section The outer portion of shape, described central part middle part are vertically provided with main processing hole, and described central part is towards the end face of upper mould with remote From the direction arc-shaped bend gradually downward in main processing hole, described lower mould is provided with around outer portion to be adapted with outer portion shape Deformation hole, described lower mould be located at be provided with below outer portion for lower mould vertical lifting deformation de- material chamber and by outer portion to The de- material return unit of upper reset, described upper mould are provided with the first processing seat, and the described first processing seat is provided with and central part The bending hole being adapted with central part shape is correspondingly arranged on, the described first processing seat is located at setting and deformation in the middle part of bending hole The hole machined block that hole shape is adapted, the periphery of the described first processing seat are adapted with the inner circumferential shape in deformation hole.
2. special-shaped workpiece processing mold according to claim 1, it is characterised in that:Described lower mould is located at each machining position point More than two mould positioning holes are not provided with, and described upper mould is vertically provided with guide rod and sliding and is limited in the upper work of guide rod Dynamic plate, is provided with the portable plate return unit for resetting upper mobile board downwards, described is upper between described upper mould and upper mobile board Portable plate is correspondingly arranged on locating rod with each mould positioning hole, and described locating rod lower end is provided with round table-like correcting block, institute Locating rod is fixed at the larger end for the correcting block stated, and small end is towards lower mould, and described upper mould opposing metallic is with transmission direction Front end is provided with hole drift, and described lower mould is correspondingly arranged on positioning processing hole with each hole drift, and described hole drift is in gold The arrangement for the through hole that category band is gone out is identical with respect to the arrangement of place station with mould positioning hole.
3. special-shaped workpiece processing mold according to claim 2, it is characterised in that:Described lower mould is relative to be passed along metal tape The end in defeated direction is provided with cut-out hole, spacing and the metal strip edge and the spacing phase of finished product excision position in described cut-out hole Adaptation, described upper mobile board are correspondingly arranged on cutoff tool with each cut-out hole.
4. special-shaped workpiece processing mold according to claim 1, it is characterised in that:Described lower mould is along metal tape transmission side Floating stability column is respectively arranged with to and positioned at metal tape both sides, described lower mould, which is located at below floating stability column, to be provided with for floating The flotation chamber of dynamic stability post vertical lifting and the floating return unit for resetting floating stability column upwards, outside described floating stability column It is provided with the spacing stopper slot of metal strip edge in week.
5. according to the special-shaped workpiece processing mold described in claim 1 or 2 or 3 or 4, it is characterised in that:Described lower mould edge gold Category band transmission direction is disposed with the first station, second station, 3rd station and the 4th station, described central part and outer shroud Portion is located at the first station of lower mould, and described lower mould is located at second station and is provided with interior rectangle processing hole and U-shaped processing hole, described Upper mould and rectangle processing hole and U-shaped processing hole be correspondingly arranged on interior rectangular punch and U-shaped drift respectively, described lower mould is located at 3rd station is provided with two circular processing holes, edge rectangle processing hole and the bending rectangle corresponding with U-shaped processing hole and processed Hole, described upper mould are correspondingly arranged on circular punching respectively with circular processing hole, edge rectangle processing hole and bending rectangle processing hole Head, edge rectangular punch and Bending punch, described lower mould are located at the 4th station and are provided with and workpiece outer contour shape identical Charging conduit, described upper mould are correspondingly arranged on blanking die with charging conduit, and described lower mould is located at UNICOM below charging conduit and set There is tapping channel.
CN201711007915.5A 2017-10-25 2017-10-25 Special-shaped workpiece machining die Active CN107838289B (en)

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Application Number Priority Date Filing Date Title
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CN107838289B CN107838289B (en) 2023-10-31

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110052523A (en) * 2019-04-30 2019-07-26 安徽省宁国市东波紧固件有限公司 A kind of retaining ring punching press feeding structure and punching machine
CN110523848A (en) * 2019-09-18 2019-12-03 深圳嘉信源科技实业有限公司 A kind of progressive die of earphone front shroud fixed steelring
CN111633170A (en) * 2020-05-15 2020-09-08 宝鸡富士特钛业(集团)有限公司 Forging device of TC4 titanium blank

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US6101859A (en) * 1999-02-18 2000-08-15 Wilshine Corp. Die assembly for forming a pattern on a metal plate
KR20080114637A (en) * 2008-10-16 2008-12-31 김흥규 Steel grating and its manufacturing method
CN202621732U (en) * 2012-06-29 2012-12-26 宁波科艺德电气有限公司 Progressive stamping die for processing ground joint sheet of socket
CN202963204U (en) * 2012-11-13 2013-06-05 蚌埠铁路五金建材总厂 Locking spring progressive die for sealing lock
CN202963205U (en) * 2012-11-13 2013-06-05 蚌埠铁路五金建材总厂 Sealing steel strip clip progressive die
CN207357914U (en) * 2017-10-25 2018-05-15 温州鹏业机械有限公司 A kind of special-shaped workpiece processing mold

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6101859A (en) * 1999-02-18 2000-08-15 Wilshine Corp. Die assembly for forming a pattern on a metal plate
KR20080114637A (en) * 2008-10-16 2008-12-31 김흥규 Steel grating and its manufacturing method
CN202621732U (en) * 2012-06-29 2012-12-26 宁波科艺德电气有限公司 Progressive stamping die for processing ground joint sheet of socket
CN202963204U (en) * 2012-11-13 2013-06-05 蚌埠铁路五金建材总厂 Locking spring progressive die for sealing lock
CN202963205U (en) * 2012-11-13 2013-06-05 蚌埠铁路五金建材总厂 Sealing steel strip clip progressive die
CN207357914U (en) * 2017-10-25 2018-05-15 温州鹏业机械有限公司 A kind of special-shaped workpiece processing mold

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110052523A (en) * 2019-04-30 2019-07-26 安徽省宁国市东波紧固件有限公司 A kind of retaining ring punching press feeding structure and punching machine
CN110523848A (en) * 2019-09-18 2019-12-03 深圳嘉信源科技实业有限公司 A kind of progressive die of earphone front shroud fixed steelring
CN111633170A (en) * 2020-05-15 2020-09-08 宝鸡富士特钛业(集团)有限公司 Forging device of TC4 titanium blank

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