CN203426284U - Edge curling mold - Google Patents

Edge curling mold Download PDF

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Publication number
CN203426284U
CN203426284U CN201320528843.XU CN201320528843U CN203426284U CN 203426284 U CN203426284 U CN 203426284U CN 201320528843 U CN201320528843 U CN 201320528843U CN 203426284 U CN203426284 U CN 203426284U
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CN
China
Prior art keywords
positive stop
pressure head
die
shaped chute
counterdie
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201320528843.XU
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Chinese (zh)
Inventor
董林
刘扬
盛陈
李国庆
余长海
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Dajiang Industry Co Ltd
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Chongqing Dajiang Industry Co Ltd
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Publication date
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Priority to CN201320528843.XU priority Critical patent/CN203426284U/en
Application granted granted Critical
Publication of CN203426284U publication Critical patent/CN203426284U/en
Withdrawn - After Issue legal-status Critical Current
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Abstract

The utility model discloses an edge curling mold. The mold comprises a connector, an upper module, a pressure transmitting block, a square box, an upper mold pressing head base, an upper mold pressing head, a lower mold base, a lower mold pressing head base, a lower mold pressing head, a platform, a large limiting stopping block, a small limiting stopping block and a right stopping block, wherein the connector is fixed to the position above the upper module, the pressure transmitting block is fixed to the lower left position of the upper module, the square box is fixed to the lower right position of the upper module, the upper mold pressing head base is matched with the square box in a sliding mode, and the upper mold pressing head is fixed to the lower end of the upper mold pressing head base; the lower mold pressing head base is installed in a first T-type sliding groove of the lower mold base, the lower mold pressing head is fixed to the lower mold pressing head base, the platform is fixed to the lower mold base, the large limiting stopping block is installed in the first T-type sliding groove, the right stopping block is fixed to the right end of the lower mold base, the left end of a large screw rod is connected with the large limiting stopping block, a second T-type sliding groove is formed in the large limiting stopping block, the small limiting stopping block is installed in the second T-type sliding groove, and the left end of a small screw rod is connected with the small limiting stopping block. The edge curling mold is good in universality.

Description

A kind of die with edge-folded
Technical field
The utility model belongs to machine dies, is specifically related to a kind of die with edge-folded.
Background technology
Along with the production model of small batch is increasingly outstanding, product variety various, causes the input of each mould to increase, and production cost increases.How both to have reduced mould and dropped into, the problem of the current required thinking of person that the Production requirement that does not affect again multiple parts becomes Design of Dies.
The curling mould using at present, as shown in Figure 9, comprises patrix 26, counterdie 27 and fixed head 28, and the curling mould of this kind of structure exists following shortcoming:
(1) during processing different size workpiece, need integral replacing counterdie, when product specification is more, integral replacing, on hydraulic press platform, location clamps counterdie and makes production efficiency lower again;
(2) after processing, workpiece needs a part to pound out, and product knocks easy distortion, and wastes time and energy;
(3) for the workpiece 25(that has angle to require referring to Fig. 7 and Fig. 8, workpiece has hypotenuse in the one end away from crimping), need that crimping is complete to be cut again, press the workpiece of gestalt to cut again and be not easy location, and affect former forming effect, increase production cost;
(4), in production in enormous quantities, the efficiency of utilizing this curling mould to produce is lower;
(5) when product specification kind is more, number of molds also drops into more, and a kind of specification product of every design must newly be done a mold, and mould input totle drilling cost is larger.
Utility model content
The purpose of this utility model is to provide a kind of die with edge-folded, to improve versatility.
Die with edge-folded described in the utility model, comprises upper die component and lower membrane module;
Described upper die component comprises connector, upper module, transmission of pressure piece, square chest, patrix pressure head pedestal and patrix pressure head, described connector is fixed on the top of upper module, described transmission of pressure piece is fixed on the lower left of upper module, and the lower end of transmission of pressure piece has the first inclined-plane, and this first inclined-plane is inclined upwardly towards right side from left side, described square chest is fixed on the lower right of upper module, the upper end of described patrix pressure head pedestal extend in square chest and is slidably matched with square chest, described patrix pressure head is removably fixed on the lower end of patrix pressure head pedestal, the bottom in described patrix pressure head left side has first deep-slotted chip breaker suitable with the right half part of flanging of workpieces,
Described lower membrane module comprises lower die base, counterdie pressure head pedestal, counterdie pressure head, platform, large positive stop, little positive stop and right block, described lower die base upper surface has the first T-shaped chute along left and right directions, described counterdie pressure head pedestal is arranged in this first T-shaped chute, and the upper end of counterdie pressure head pedestal has second inclined-plane corresponding with described the first inclined-plane, under the effect of transmission of pressure piece, described counterdie pressure head pedestal can slide along the first T-shaped chute, described counterdie pressure head is removably fixed on counterdie pressure head pedestal, described counterdie pressure head right side is having second deep-slotted chip breaker suitable with the left-half of flanging of workpieces with described the first deep-slotted chip breaker opposite position place, described platform is fixed in lower die base and is vertical to right with described patrix pressure head, described large positive stop is arranged in the first T-shaped chute and is positioned at platform right side, described right block is removably fixed on the right-hand member of lower die base, the left end level of described large screw rod is passed this right block and is connected with large positive stop, rotational by large screw rod drives large positive stop to move left and right along the first T-shaped chute, upper surface at large positive stop has the second T-shaped chute along left and right directions, described little positive stop is arranged in the second T-shaped chute, the left end level of described small screw is passed large positive stop and is connected with little positive stop, rotational by small screw drives little positive stop to move left and right along the second T-shaped chute.
The upper surface of described patrix pressure head pedestal has first ring connected in star, described Compress Spring is arranged in first ring connected in star, the lower surface of described cope match-plate pattern is that first ring connected in star corresponding position has the second annular groove, described Compress Spring extend in this second annular groove, and the upper end of Compress Spring contacts with cope match-plate pattern.After press power is removed, patrix pressure head pedestal can be under compression spring effect with respect to square chest down sliding to initial position.
In described counterdie pressure head pedestal, longitudinally have through hole, in described the first T-shaped chute, be provided with the middle block perpendicular to its bottom, in described the first T-shaped chute, be also provided with counterdie pressure head pedestal returning device, this counterdie pressure head pedestal returning device comprises return spring and return frame, described return frame comprises vertical section and horizontal segment, described vertical section extend in through hole, described return spring is enclosed within on horizontal segment, and the right-hand member of return spring contacts with middle block, under the effect of return spring, make counterdie pressure head pedestal after flanging of workpieces is complete, be returned to initial position.
Also comprise template and two location briquettings, before and after two location briquettings are, interval is arranged, and the right-hand member of two location briquettings is removably fixed on respectively the top of large positive stop, in the lower left of each location briquetting, be connected with location briquetting hold-down head, described template is pressed on the upper surface of large positive stop by location briquetting hold-down head.By template, to there being the workpiece of profile angle demand to carry out spacing keeping out, by location briquetting hold-down head, can avoid template to be subject to workpiece cross component force to alter position.
The right-hand member of described location briquetting has square opening, and described location briquetting uses screw fastening above large positive stop by this square opening.By square opening, limiting location briquetting rotates.
Also comprise lengthening lower die base; the dismountable right-hand member that is fixed on described lower die base of left end of described lengthening lower die base; the upper surface of described lengthening lower die base has the 3rd T-shaped chute along left and right directions; described large positive stop is arranged in the 3rd T-shaped chute; described right block is removably fixed on the right-hand member that lengthens lower die base; the left end level of described large screw rod is through this right block being connected with large positive stop, and the rotational by large screw rod drives large positive stop to move left and right along the 3rd T-shaped chute.Lengthening lower die base can be in order to increase workpiece length.
The left end cuff of described large screw rod has the large chuck of semicircle, has the vat with the large chuck corresponding matching of this semicircle on the right side of described large positive stop, and the left end of described large screw rod is screwed on large positive stop by the large chuck of semicircle, vat.
The left end cuff of described small screw has the little chuck of semicircle, has the sulculus with this semicircle lesser calorie dish corresponding matching on the right side of described little positive stop, and the left end of described small screw is screwed on little positive stop by the little chuck of semicircle, sulculus.
The utlity model has following advantage:
(1) the equal energy of upper and lower mold pressing head quick-detachment, only need replace with, counterdie pressure head, just can realize different size flanging of workpieces demand, in addition, by large and small positive stop, can realize the adjusting of length direction, can meet the processing request of different length workpiece, simple and quick, location clamping efficiency is higher, versatility is good, can reduce the quantity of mould, be convenient to lean management, and save the input cost of mould;
(2) the complete rear workpiece of crimping can directly take off, and need not knock again, avoids product to knock and produces distortion;
(3) can be to there being the workpiece of profile angle demand to carry out spacing keeping out by template, thus the complete cutting action again of crimping saved;
(4) lower die base leaves interface, when new product exceeds original die length, can set up lengthening lower die base, has saved and has made the cost of mould again and guaranteed the requirement of new product manufacturing schedule;
In sum, the utility model adopts upper and lower mould combining structure, and in conjunction with some relevant die mould frame for movement, adopted that many places can be assembled, convertible mechanism, can be adapted to the crimping requirement of products of different specifications, during use, only need to change different model pressure head and just can go out needed workpiece by crimping, versatility is better, is specially adapted to product diversification, the production of small batch part and model change enterprise faster.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is along the cross-sectional schematic of A-A line in Fig. 2;
Fig. 4 is the cross-sectional schematic of upper die component in the utility model;
Fig. 5 is the cross-sectional schematic of lower membrane module in the utility model;
Fig. 6 is axle side schematic diagram of the present utility model;
Fig. 7 is a kind of structural representation of crimping part;
Fig. 8 is the top view of Fig. 7;
Fig. 9 is the structural representation of existing die with edge-folded.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Die with edge-folded as shown in Figures 1 to 8, comprises upper die component and lower membrane module;
Described upper die component comprises connector 5, upper module 6, transmission of pressure piece 7, square chest 3, patrix pressure head pedestal 2 and patrix pressure head 1, described connector 5 is fixed on the top of upper module 6, connector 5 is connected with hydraulic press, and whole upper die component is clamped on hydraulic press, by hydraulic press, to upper die component, apply pressure vertically downward, described transmission of pressure piece 7 is fixed on the lower left of upper module 6, and the lower end of transmission of pressure piece 7 has the first inclined-plane 7a, and this first inclined-plane 7a is inclined upwardly towards right side from left side, described square chest 3 is fixed by screws in the lower right of upper module 6, the upper end of described patrix pressure head pedestal 2 extend in square chest 3 and is slidably matched with square chest 3, the upper surface of described patrix pressure head pedestal 2 has the first groove 2a, described Compress Spring 4 is arranged in the first groove 2a, the lower surface of described upper module 6 is that the first groove 2a corresponding position has the second groove 6a, described Compress Spring 4 extend in this second groove 6a, and the upper end of Compress Spring 4 contacts with upper module 6.Patrix pressure head pedestal 2 can be with respect to square chest 3 upward slidings under press power effect, after press power is removed, can be under compression spring 4 effect with respect to square chest 3 down slidings to initial position, by patrix pressure head pedestal 2 compressions, treat edge-curling workpieces 25, prevent that workpiece 25 from altering position in crimping process; Described patrix pressure head 1 is removably fixed on the lower end of patrix pressure head pedestal 2 by hex screw, patrix pressure head 1 can require to change corresponding model according to different size flanging of workpieces, simple and convenient, and integral body is pulled down patrix and clamped from new location again; The bottom in described patrix pressure head 1 left side has the first deep-slotted chip breaker 1a suitable with the right half part of workpiece 25 crimping 25a;
Described lower membrane module comprises lower die base 13, counterdie pressure head pedestal 9, counterdie pressure head 8, platform 10, large positive stop 14, little positive stop 21 and right block 17, described lower die base 13 upper surfaces have the first T-shaped chute 13a along left and right directions, described counterdie pressure head pedestal 9 is arranged in this first T-shaped chute 13a, and the upper end of counterdie pressure head pedestal 9 has the second inclined-plane 9a corresponding with described the first inclined-plane 7a, under the effect of transmission of pressure piece 7, described counterdie pressure head pedestal 9 can slide along the first T-shaped chute 13a, thereby provide crimping required horizontal force, described counterdie pressure head 8 is removably fixed on counterdie pressure head pedestal 9 by hex screw, counterdie pressure head 8 can require to change corresponding model according to different size flanging of workpieces, simple and convenient, integral body is pulled down counterdie and is clamped from new location again, the interior through hole 9b that longitudinally has of described counterdie pressure head pedestal 9, in described the first T-shaped chute 13a, be provided with the middle block 13b perpendicular to its bottom, in described the first T-shaped chute 13a, be also provided with counterdie pressure head pedestal returning device, this counterdie pressure head pedestal returning device comprises return spring 12 and return frame 11, described return frame 11 comprises vertical section and horizontal segment, described vertical section extend in through hole 9b, and described return spring 12 is enclosed within on horizontal segment, and the right-hand member of return spring 12 contacts with middle block 13b.Under the effect of return spring 12, make counterdie pressure head pedestal 9 after flanging of workpieces is complete, be returned to initial position, described counterdie pressure head 8 right sides are having the second deep-slotted chip breaker 8a suitable with the left-half of workpiece 25 crimping 25a with described the first deep-slotted chip breaker 1a opposite position place, described platform 10 is fixed in lower die base 13 and is vertical to right with described patrix pressure head 1, described large positive stop 14 is arranged in the first T-shaped chute 13a and is positioned at platform 10 right sides, described right block 17 is removably fixed on the right-hand member of lower die base 13, the left end level of described large screw rod 16 is passed this right block 17 and is connected with large positive stop 14, described large screw rod 16 threaded engagement are in the screwed hole of right block 17, rotational by large screw rod 16 drives large positive stop 14 to move left and right along the first T-shaped chute 13a, make large positive stop 14 adjust spacing position with workpiece 25 length differences, upper surface at large positive stop 14 has the second T-shaped chute 14a along left and right directions, described little positive stop 21 is arranged in the second T-shaped chute 14a, the left end level of described small screw 18 is passed large positive stop 14 and is connected with little positive stop 21, described small screw 18 threaded engagement are in the screwed hole of large positive stop 14, rotational by small screw 18 drives little positive stop 21 to move left and right along the second T-shaped chute 14a, makes little positive stop 21 adjust spacing position with workpiece 25 length differences, long when wider when workpiece 25, the right-hand member by 14 pairs of workpiece 25 of large positive stop carries out spacing, shorter when narrower when workpiece 25, the right-hand member by 21 pairs of workpiece 25 of little positive stop carries out spacing.
As shown in Figure 3 and Figure 5, also comprise template 24 and two location briquettings 22, before and after two location briquettings 22 are, interval is arranged, the right-hand member of described location briquetting 22 has square opening, and the right-hand member of two location briquettings 22 is fastened on respectively the top of large positive stop 14 with soket head cap screw by this square opening, by square opening, limiting location briquetting 22 rotates, in the lower left of each location briquetting 22, be connected with location briquetting hold-down head 23, described template 24 is pressed on the upper surface of large positive stop 14 by location briquetting hold-down head 23, by 24 pairs, template, there is the workpiece of profile angle demand to carry out spacing keeping out, by location briquetting hold-down head 23, can avoid template 24 to be subject to workpiece cross component force to alter position.
As shown in Figure 3 and Figure 5, also comprise and lengthen lower die base 15, when the length of workpiece 25 exceeds the spacing limit of die length direction, the left end of described lengthening lower die base 15 is fastened on to the right-hand member of described lower die base 13 by soket head cap screw, the upper surface of described lengthening lower die base 15 has the 3rd T-shaped chute 15a along left and right directions, when having additional long lower die base 15, described large positive stop 14 is arranged in the 3rd T-shaped chute 15a, described right block 17 is removably fixed on the right-hand member that lengthens lower die base 15, the left end level of described large screw rod 16 is passed this right block 17 and is connected with large positive stop 14, described large screw rod 16 threaded engagement are in the screwed hole of right block 17, rotational by large screw rod 16 drives large positive stop 14 to move left and right along the 3rd T-shaped chute 15a, make large positive stop 14 adjust spacing position with workpiece 25 length differences.
As shown in Figure 3 and Figure 5, the left end cuff of described large screw rod 16 has the large chuck 19 of semicircle, on the right side of described large positive stop 14, have the vat 14b with large chuck 19 corresponding matching of this semicircle, the left end of described large screw rod 16 is stuck in vat 14b and with hex screw and is fixed on large positive stop 14 by the large chuck 19 of semicircle.
As shown in Figure 3 and Figure 5, the left end cuff of described small screw 18 has semicircle lesser calorie dish 20, on the right side of described little positive stop 21, have the sulculus 21a with these semicircle lesser calorie dish 20 corresponding matching, the left end of described small screw 18 is stuck in sulculus 21a and with hex screw and is fixed on little positive stop 21 by semicircle lesser calorie dish 20.
Utilize the procedure of processing of this die with edge-folded as follows:
Step 1, this die with edge-folded is placed on hydraulic press operating platform, with fixture location on hydraulic press, clamps;
Step 2, according to product specification select the patrix pressure head 1 of corresponding model, counterdie pressure head 8, is fastened on patrix pressure head 1 with soket head cap screw the lower end of patrix pressure head pedestal 2, with soket head cap screw, counterdie pressure head 8 is fastened on counterdie pressure head pedestal 9;
Step 3, according to the workpiece 25 spacing positions of length of run adjusted size initial workpiece, if the workpiece that has profile angle to need is first selected the template corresponding with workpiece 24, and compressed template 24;
Step 4, after adjusted size is good, can carry out batch machining.

Claims (8)

1. a die with edge-folded, is characterized in that: comprise upper die component and lower membrane module;
Described upper die component comprises connector (5), upper module (6), transmission of pressure piece (7), square chest (3), patrix pressure head pedestal (2) and patrix pressure head (1), described connector (5) is fixed on the top of upper module (6), described transmission of pressure piece (7) is fixed on the lower left of upper module (6), and the lower end of transmission of pressure piece (7) has the first inclined-plane (7a), and this first inclined-plane (7a) is inclined upwardly towards right side from left side, described square chest (3) is fixed on the lower right of upper module (6), the upper end of described patrix pressure head pedestal (2) extend in square chest (3) and is slidably matched with square chest (3), described patrix pressure head (1) is removably fixed on the lower end of patrix pressure head pedestal (2), the bottom in described patrix pressure head (1) left side has first deep-slotted chip breaker (1a) suitable with the right half part of the crimping (25a) of workpiece (25),
Described lower membrane module comprises lower die base (13), counterdie pressure head pedestal (9), counterdie pressure head (8), platform (10), large positive stop (14), little positive stop (21) and right block (17), described lower die base (13) upper surface has the first T-shaped chute (13a) along left and right directions, described counterdie pressure head pedestal (9) is arranged in this first T-shaped chute (13a), and the upper end of counterdie pressure head pedestal (9) has second inclined-plane (9a) corresponding with described the first inclined-plane (7a), under the effect of transmission of pressure piece (7), described counterdie pressure head pedestal (9) can slide along the first T-shaped chute (13a), described counterdie pressure head (8) is removably fixed on counterdie pressure head pedestal (9), described counterdie pressure head (8) right side is having second deep-slotted chip breaker (8a) suitable with the left-half of the crimping (25a) of workpiece (25) with described the first deep-slotted chip breaker (1a) opposite position place, it is upper and vertical to right with described patrix pressure head (1) that described platform (10) is fixed on lower die base (13), described large positive stop (14) is arranged in the first T-shaped chute (13a) and is positioned at platform (10) right side, described right block (17) is removably fixed on the right-hand member of lower die base (13), the left end level of described large screw rod (16) is passed this right block (17) and is connected with large positive stop (14), rotational by large screw rod (16) drives large positive stop (14) to move left and right along the first T-shaped chute (13a), upper surface at large positive stop (14) has the second T-shaped chute (14a) along left and right directions, described little positive stop (21) is arranged in the second T-shaped chute (14a), the left end level of described small screw (18) is passed large positive stop (14) and is connected with little positive stop (21), rotational by small screw (18) drives little positive stop (21) to move left and right along the second T-shaped chute (14a).
2. die with edge-folded according to claim 1, it is characterized in that: the upper surface of described patrix pressure head pedestal (2) has the first groove (2a), described Compress Spring (4) is arranged in the first groove (2a), the lower surface of described upper module (6) is that the first groove (2a) corresponding position has the second groove (6a), described Compress Spring (4) extend in this second groove (6a), and the upper end of Compress Spring (4) contacts with upper module (6).
3. die with edge-folded according to claim 1 and 2, it is characterized in that: in described counterdie pressure head pedestal (9), longitudinally have through hole (9b), in described the first T-shaped chute (13a), be provided with the middle block (13b) perpendicular to its bottom, in described the first T-shaped chute (13a), be also provided with counterdie pressure head pedestal returning device, this counterdie pressure head pedestal returning device comprises return spring (12) and return frame (11), described return frame (11) comprises vertical section and horizontal segment, described vertical section extend in through hole (9b), described return spring (12) is enclosed within on horizontal segment, and the right-hand member of return spring (12) contacts with middle block (13b).
4. die with edge-folded according to claim 1 and 2, it is characterized in that: also comprise template (24) and two location briquettings (22), before and after two location briquettings (22) are, interval is arranged, and the right-hand member of two location briquettings (22) is removably fixed on respectively the top of large positive stop (14), in the lower left of each location briquetting (22), be connected with location briquetting hold-down head (23), described template (24) is pressed on the upper surface of large positive stop (14) by location briquetting hold-down head (23).
5. die with edge-folded according to claim 4, is characterized in that: the right-hand member of described location briquetting (22) has square opening, and described location briquetting (22) uses screw fastening in the top of large positive stop (14) by this square opening.
6. die with edge-folded according to claim 1 and 2, it is characterized in that: also comprise and lengthen lower die base (15), the dismountable right-hand member that is fixed on described lower die base (13) of left end of described lengthening lower die base (15), the upper surface of described lengthening lower die base (15) has the 3rd T-shaped chute (15a) along left and right directions, described large positive stop (14) is arranged in the 3rd T-shaped chute (15a), described right block (17) is removably fixed on the right-hand member that lengthens lower die base (15), the left end level of described large screw rod (16) is passed this right block (17) and is connected with large positive stop (14), rotational by large screw rod (16) drives large positive stop (14) to move left and right along the 3rd T-shaped chute (15a).
7. die with edge-folded according to claim 6, it is characterized in that: the left end cuff of described large screw rod (16) has the large chuck of semicircle (19), on the right side of described large positive stop (14), have the vat (14b) with the large chuck of this semicircle (19) corresponding matching, the left end of described large screw rod (16) is screwed on large positive stop (14) by the large chuck of semicircle (19), vat (14b).
8. die with edge-folded according to claim 1 and 2, it is characterized in that: the left end cuff of described small screw (18) has the little chuck of semicircle (20), on the right side of described little positive stop (21), have the sulculus (21a) with the little chuck of this semicircle (20) corresponding matching, the left end of described small screw (18) is screwed on little positive stop (21) by the little chuck of semicircle (20), sulculus (21a).
CN201320528843.XU 2013-08-28 2013-08-28 Edge curling mold Withdrawn - After Issue CN203426284U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320528843.XU CN203426284U (en) 2013-08-28 2013-08-28 Edge curling mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320528843.XU CN203426284U (en) 2013-08-28 2013-08-28 Edge curling mold

Publications (1)

Publication Number Publication Date
CN203426284U true CN203426284U (en) 2014-02-12

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CN201320528843.XU Withdrawn - After Issue CN203426284U (en) 2013-08-28 2013-08-28 Edge curling mold

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103433386A (en) * 2013-08-28 2013-12-11 重庆大江工业有限责任公司 Crimping die
CN106563719A (en) * 2016-10-27 2017-04-19 安徽新荣钢构有限公司 Punching equipment of edge-wound reinforcing plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103433386A (en) * 2013-08-28 2013-12-11 重庆大江工业有限责任公司 Crimping die
CN106563719A (en) * 2016-10-27 2017-04-19 安徽新荣钢构有限公司 Punching equipment of edge-wound reinforcing plate

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Granted publication date: 20140212

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