CN104399816A - Clamp bending fixture and clamp dual-lug forming die - Google Patents
Clamp bending fixture and clamp dual-lug forming die Download PDFInfo
- Publication number
- CN104399816A CN104399816A CN201410684688.XA CN201410684688A CN104399816A CN 104399816 A CN104399816 A CN 104399816A CN 201410684688 A CN201410684688 A CN 201410684688A CN 104399816 A CN104399816 A CN 104399816A
- Authority
- CN
- China
- Prior art keywords
- clip
- base substrate
- ears
- forming tank
- dip mold
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, 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
- B21D43/26—Stops
Abstract
The invention discloses a clamp bending fixture and a clamp dual-lug forming die. The dual-lug forming die comprises a first upper pressing die and a first lower pressing die; a first forming groove corresponding to a clamp head, a clamp neck and a clamp tail and extending downwards and a supporting surface corresponding to a clamp dual-lug part and in anti-push limiting fit with the clamp dual lugs in the downward direction are formed in the first lower pressing die; a first pressure head matched with the first forming groove is arranged on the first upper pressing die at a position corresponding to the first forming groove up and down. In use, the first pressure head moves downwards and presses a clamp blank into the first forming groove, and meanwhile, the supporting surface supports and stops the dual-lug part of the clamp, and therefore, the dual-lug part of the clamp can be bent; the bending accuracy of the dual-lug part is guaranteed by use of the design and the use of the die and the processing efficiency is improved.
Description
Technical field
the present invention relates to mould, particularly relate to a kind of clip bending frock and clip ears mould.
Background technology
Along with developing rapidly of aerospace industry, the manufacturing technology level of aircraft is enhanced.In the manufacturing process of aircraft, need to use little, the lightweight union piece of many volumes, existing a kind of clip as shown in Figure 1-2, needs a large amount of use in the manufacture process of aircraft, but, the production of this clip generally adopts manual light instrument to process, process more consuming time, production efficiency is lower, simultaneously, processing clip by hand has many precision not reach requirement, improves percent defective.
Be illustrated in figure 3 the clip base substrate of processing required for clip, clip base substrate 100 is made up of four parts, comprise the clip head 101 of front end, comprise the clip ears 102 of left and right Liang Ge ear, clip neck 103 and be positioned at the clip afterbody 104 of rear end, the process of clip mainly comprises three operations, first operation bends clip ears 102 and process the first base substrate, the structure of the first base substrate as shown in Figure 4, second operation bends clip neck 103 and be processed into the second base substrate, the structure of the second base substrate as shown in Figure 5, 3rd operation flattens clip afterbody 104 and be processed into clip finished product, the ears part of clip is clipped in the clip head that to pound with a hammer after on bench vice by existing first operation often, neck and afterbody thus bend clip ears successively, such bending ears bending angle is out inadequate, ears can not ensure opposing parallel, precision is poor, just cause connection not firm in use, have a strong impact on result of use.
Summary of the invention
The object of the present invention is to provide a kind of clip ears mould higher to clip ears part machining accuracy; Meanwhile, present invention also offers a kind of clip bending frock using this clip ears mould.
Clip ears mould of the present invention adopts following technical scheme: a kind of clip ears mould, comprise the first top die and the first dip mold, described first dip mold be provided with first forming tank to downward-extension corresponding with clip head, clip neck and clip afterbody and correspond to clip ears part for the clip ears spacing supporting surface coordinated of thrust in a downward direction, described first top die is provided with the first pressure head with the first forming tank adaptation in the position up and down corresponding with the first forming tank.
Be provided with in described first forming tank for when clip base substrate puts into locating slot for contacting with the lower surface of clip base substrate and supporting the back-up block of clip base substrate, being provided with between the bottom land of described back-up block and the first forming tank can the elastic component of the material returned after moulded section.
Clip bending frock of the present invention adopts following technical scheme: a kind of clip bending frock, comprise the clip ears mould for being pressed to clip ears part, described clip ears mould comprises the first top die and the first dip mold, described first dip mold is provided with and clip head, clip neck and corresponding the first forming tank to downward-extension of clip afterbody and correspond to clip ears part for the clip ears spacing supporting surface coordinated of thrust in a downward direction, described first top die is provided with the first pressure head with the first forming tank adaptation in the position corresponding up and down with the first forming tank.
Be provided with in described first forming tank for when clip base substrate puts into locating slot for contacting with the lower surface of clip base substrate and supporting the back-up block of clip base substrate, being provided with between the bottom land of described back-up block and the first forming tank can the elastic component of the material returned after moulded section.
Described clip bending frock also comprises for carrying out the shaping U-shaped mould of neck flexion to the first base substrate, described U-shaped mould comprises the second top die and the second dip mold, described second dip mold is provided with the second forming tank that the left and right for coincideing with clip neck flexion radius extends, described second dip mold is also provided with in the longitudinal direction to the spacing position limiting structure in order to determine clip neck flexion position of clip base substrate block, described second top die is provided with for second forming tank suitable second pressure head identical with clip neck flexion radius.
Described second dip mold has and coordinates with the medial surface block of at least one clip ear corresponding to clip ears position, and for side spacing to the first base substrate on left and/or right direction.
Described clip bending frock also comprises for carrying out the shaping circular arc molding mould of pressing to clip afterbody, described circular arc molding mould comprises the 3rd top die and the 3rd dip mold, described 3rd top die comprises the plane press section for being flattened by clip afterbody and is used for keeping the circular arc press section of clip neck flexion part, and described 3rd dip mold is provided with the supporting plane for fitting with clip head.
Described 3rd dip mold is rectangular block, and described supporting plane is the upper surface of rectangular block, and the upper surface of rectangular block is provided with the locating piece for coordinating with the front end block of the second base substrate.
Described rectangular block has and coordinates with the medial surface block of at least one clip ear corresponding to clip ears position, and on left and/or right direction to the side that the second base substrate is located.
Clip ears mould of the present invention comprises the first top die and the first dip mold, first dip mold be provided with first forming tank to downward-extension corresponding with clip head, clip neck and clip afterbody and correspond to clip ears part for the clip ears spacing supporting surface coordinated of block in a downward direction, the first top die is provided with the first pressure head with the first forming tank adaptation in the position up and down corresponding with the first forming tank.In use, first pressure head moves downward and presses in the first forming tank by clip base substrate, supporting surface carries out support block to clip ears part simultaneously, thus the bending formed clip ears part, the design and use of this mould ensure that and the bending precision of ears part improve working (machining) efficiency.
Further, be provided with back-up block in the first forming tank, be provided with elastic component between back-up block and forming tank bottom land, after the first pressure head compacting clip ears complete, elastic component can pass through the elastic rebound material returned, easy to use.
Accompanying drawing explanation
Fig. 1 is the front view of clip;
Fig. 2 is the top view of clip;
Fig. 3 is the structural representation of clip base substrate;
Fig. 4 is the structural representation of the first base substrate;
Fig. 5 is the structural representation of the second base substrate;
Fig. 6 is the structural representation of dip mold in a kind of clip ears mould embodiment of the present invention;
Fig. 7 is A-A place sectional view in Fig. 6;
Fig. 8 be with the dip mold in Fig. 6 with the use of the structural representation of top die;
Fig. 9 is the using state figure of clip ears mould embodiment of the present invention;
Figure 10 is the structural representation of top die in a kind of U-shaped mould embodiment of the present invention;
Figure 11 is the left view of Figure 10;
Figure 12 be with the cope match-plate pattern in Figure 10 with the use of the structural representation of dip mold;
Figure 13 is the top view of Figure 12;
Figure 14 is the using state figure of the U-shaped mould embodiment of the present invention;
Figure 15 is the structural representation of dip mold in a kind of circular arc molding Die Embodiment of the present invention;
Figure 16 is the top view of Figure 15;
Figure 17 be with the dip mold in Figure 15 with the use of the structural representation of top die;
Figure 18 is the left view of Figure 17;
Figure 19 is the using state figure of circular arc molding Die Embodiment of the present invention.
Detailed description of the invention
The embodiment of a kind of clip bending frock of the present invention: as shown in Fig. 6-19, this clip bending frock comprises the three sleeve forming moulds being respectively used to sequentially complete three manufacturing procedures, three sleeve forming moulds include, lower two pressing molds, be the clip ears mould for processing the first operation as Figure 6-9, be the U-shaped mould for processing the second operation as shown in figures 10-14, be the circular arc molding mould for processing the 3rd operation as shown in figures 15-19, certainly, the present embodiment each provides the U-shaped mould for processing the second operation and the circular arc molding mould for processing the 3rd operation, in other embodiments, second operation and the 3rd operation can process replacement by existing craft.
Successively three molds are described in detail with reference to the accompanying drawings below:
As shown in fig. 6-7, for the structural representation of the first dip mold 1100 of clip ears mould in the present embodiment, the upper surface of the first dip mold 1100 is provided with locating slot 1200, locating slot 1200 has the central slot corresponding respectively to clip base substrate mid portion and the grooves on two sides 1210 corresponding to ears position, clip base substrate both sides, the degree of depth of locating slot 1200 equals or slightly larger than the thickness of clip base substrate, the front side cell wall 1204 of locating slot 1200 and cell wall 1203 respectively with clip head 101 front end of clip base substrate 100 and clip ears 102 after end in contact carry out spacing to the fore-and-aft direction of clip base substrate 100, clip head is being corresponded in locating slot 1200, clip neck and clip tail position place are provided with the first forming tank 1220 from the continuation of locating slot bottom land to downward-extension, two parallel cell walls 1221 of such locating slot 1200 constitute the both sides cell wall of the first forming tank 1220, the elastic component that can stretch up and down is respectively equipped with in first forming tank 1220, jacking block and back-up block, wherein elastic component is two block rubbers 1222, certainly, elastic component can be other elastomeric materials, as adopted back-moving spring.Two block rubbers respectively relative spacing are located at the left and right sides of the first forming tank 1220 and are fitted with corresponding cell wall 1221, jacking block 1224 to be folded between two block rubbers 1222 and height lower than block rubber 1222, the upper end of back-up block 1223 position block rubber 1222, and its upper surface is concordant with the bottom land of locating slot 1200, when clip base substrate puts into locating slot 1200, the upper surface of back-up block 1223 and the lower surface of clip base substrate fit, clip base substrate lower surface in compressing process can be made to keep higher flatness by the supporting role of back-up block, the upper surface of the abaculus 1211 that the bottom land of groove 1210 corresponding to the ears position, both sides of clip body of locating slot 1200 is arranged by two relative spacings is formed, abaculus 1211 is rigid material, two opposite flanks of two abaculus 1211 form the both sides cell wall of the first forming tank 1220, when clip base substrate puts into locating slot, the upper surface of abaculus 1211 contacts with the lower surface of clip base substrate and coordinates with the thrust of clip base substrate is spacing in a downward direction, be illustrated in figure 8 with the first dip mold 1100 with the use of the first top die 1300, first top die 1300 is provided with the first pressure head 1310 coincide with the first forming tank 1220, as shown in Figure 9, at employing clip ears mould, added to clip base substrate man-hour, clip base substrate is placed in locating slot 1200, first top die 1300 band moves down, first pressure head 1310 is corresponding to the first forming tank and by the clip head of clip base substrate, clip neck and clip afterbody compress into the first forming tank, now clip ears part bending forming is made to form the first base substrate by the block effect of abaculus 1211 pairs of clip base substrate ears positions, after machining, gripper shoe is upwards pushed away by the elastic force of self by block rubber, and the first base substrate is exited the first forming tank, realize the material returned.
In the present embodiment, for clip ears in a downward direction the spacing supporting surface coordinated of thrust be the upper surface of abaculus, the upper surface of abaculus forms the part bottom land of locating slot, and in other embodiments, abaculus can be one-body molded with the first dip mold.
In the present embodiment, back-up block is provided with in first forming tank, elastic component is provided with below back-up block and between the bottom land of the first forming tank, in other embodiments, back-up block and elastic component can not be established, directly by the first pressure head, clip base substrate is pressed onto the bottom land of the first forming tank, is directly taken out by artificial when the material returned.
In the present embodiment, elastic component in first forming tank has two, jacking block is folded with between two elastic components, limited by the depressed position of jacking block to the first pressure head, in other embodiments, can not jacking block be set, and be directly controlled the depression depths of the first pressure head by the movement travel of control first top die.
In the present embodiment, first dip mold is also provided with locating slot, locating slot is positioned clip base substrate by front and back cell wall, in other embodiments, locating slot can be located clip base substrate by the cell wall of left and right directions, or adopt the cell wall of four direction all around to clip base substrate location simultaneously, or can not locating slot be set, directly processed by artificial location.
As shown in figs. 10-11, for the structural representation of the second top die 2300 of mould U-shaped in the present embodiment, second top die 2300 is provided with the second pressure head 2310, the lower end of the second pressure head 2310 has the circular arc top splenium identical with clip neck flexion radius, as illustrated by figs. 12-13, for with the second top die 2300 with the use of the second dip mold 2100, the upper surface of the second dip mold 2100 is provided with U-shaped second forming tank 2120 for coordinating with the second pressure head 2310, the upper surface of the second dip mold 2100 is provided with the stop block 2110 for coordinating with the front end block of the first base substrate in the front of the second forming tank 2120, have between stop block 2110 and the second forming tank 2120 distance determined with make the first base substrate by stop block 2110 to it after fore-and-aft direction is located, second forming tank 2120 just corresponds to the position that clip neck needs processing, ensure that the positional precision of clip neck, in addition, the spacing of the second dip mold 2100 between the extension width and two clip ears of the first base substrate of left and right directions is equal, as shown in figure 12, man-hour is added what carry out the second operation to the first base substrate, first base substrate is placed on the second dip mold 2100, and the front end of the first base substrate is contacted with stop block 2110, locate the first base substrate in the longitudinal direction, the Liang Ge ear of the first base substrate is made to be stuck in the left and right sides of the second dip mold 2100, because the width of the second dip mold is equal with the spacing between clip ears, can be positioned at left and right directions the first base substrate by the left and right side of the second dip mold, after location completes, second pressure head moves down and the clip neck of pushing tow first base substrate enters in the second forming tank, form the second base substrate, second base substrate is skidded off from left side or right side.
In the present embodiment, the width of the second dip mold equals the distance between clip ears, first base substrate to be coordinated with the block of clip ears medial surface by the left and right sides of the second dip mold and positions the first base substrate, in other embodiments, the width of the second dip mold can be less than the distance between clip ears, now, fitted by the second dip mold one side and the left side of clip or the medial surface of any one ear of right side and the first base substrate positioned, certainly, also other locate mode can be adopted, as offered two locating slots inserted for clip ears on the second dip mold respectively.
As shown in figures 15-16, for the structural representation of the 3rd dip mold 3100 of circular arc molding mould in the present embodiment, 3rd dip mold 3100 is rectangular block, upper surface be provided with left and right extend for the locating piece 3110 that coordinate spacing with the front end block of the second base substrate, the width of the 3rd dip mold 3100 equals the distance of the Liang Ge clip ear of the second base substrate, like this can respectively by locating piece 3110 and side 3101, two, left and right when the second base substrate is placed on the 3rd dip mold 3100, 3102 pairs of the second base substrates carry out the location of left and right directions, as shown in figs. 17-18, for circular arc molding mould with the 3rd dip mold with the use of the structural representation of the 3rd top die 3300, 3rd top die 3300 is provided with the 3rd pressure head 3310, top, the lower end splenium of the 3rd pressure head 3310 divides and is made up of three parts, Part I is the plane press section 3311 flattened by the afterbody of the second base substrate being positioned at the 3rd pressure head front end, Part II is the circular arc press section 3312 of the indent equal with the clip neck flexion radius of the second base substrate be positioned on rear side of plane press section 3311, Part III be positioned on rear side of circular arc press section 3312 with the clip neck limiting section 3313 that coordinates of thrust in a rearward direction, limiting section 3313 is greater than the length of plane press section to downward-extension to the length of downward-extension, wherein, circular arc press section 3312 ensures the curved shape of clip neck by interior concave arc, plane press section 3311 is for being pressed into designing requirement position by clip afterbody, limiting section 3313 is for preventing clip neck circular arc portion by crimp backward downwards when the 3rd pressure head presses, man-hour is added in the 3rd operation, by the second base substrate ears towards being placed down on the 3rd dip mold, the Liang Ge ear medial surface of clip is fitted with the left and right side of the 3rd dip mold respectively, the front end of the second base substrate is shifted onto the position contacted with locating piece 3110, 3rd pressure head has moved downward pressing mold action, clip finished product can be processed.
In the present embodiment, 3rd top die of circular arc molding mould is provided with the 3rd pressure head, and the 3rd pressure head is provided with circular arc press section, plane press section and stop section, in other embodiments, can not arrange limiting section, namely the both sides, front and back of the circular arc press section of the 3rd pressure head are in the same plane.
In the present embodiment, 3rd dip mold is rectangular block, the upper surface of rectangular block is supporting plane, the upper surface of rectangular block is provided with the locating piece for locating the second base substrate in the longitudinal direction, in other embodiments, 3rd dip mold can be dull and stereotyped, can not arrange locating piece and be located by artificial, or can position by carrying out block to the rear end of the second base substrate.
In the present embodiment, the width of rectangular block equals the spacing between the clip ears of the second base substrate, namely rectangular block is by positioning for being affixed the incompatible left and right directions to the second base substrate with the Liang Ge ear medial surface of clip, in other embodiments, the width of rectangular block can be less than the distance between the Liang Ge ear of clip, by the side of rectangular block in the face of the second base substrate positions in direction to the left or to the right, 3rd dip mold also can be other shapes, the locating slot of two the clip ears correspondences insertion for the second base substrate can be offered on the 3rd dip mold, by locating slot, the second base substrate is positioned, or also left and right location structure can not be set, directly located by artificial.
Clip bending frock of the present invention can process the higher clip of precision by the three cover frocks being applicable to three operations, realizes machined rapidly and efficiently, substantially increases working (machining) efficiency, reduce production cost.
The embodiment of a kind of clip ears mould of the present invention: as Figure 6-9, the cease to be faithful structure of the clip ears mould in frock of its concrete structure and above-mentioned clip is identical, repeats no more herein.
Claims (9)
1. a clip ears mould, it is characterized in that, comprise the first top die and the first dip mold, described first dip mold be provided with first forming tank to downward-extension corresponding with clip head, clip neck and clip afterbody and correspond to clip ears part for the clip ears spacing supporting surface coordinated of thrust in a downward direction, described first top die is provided with the first pressure head with the first forming tank adaptation in the position up and down corresponding with the first forming tank.
2. clip ears mould according to claim 1, it is characterized in that, be provided with in described first forming tank for when clip base substrate puts into locating slot for contacting with the lower surface of clip base substrate and supporting the back-up block of clip base substrate, being provided with between the bottom land of described back-up block and the first forming tank can the elastic component of the material returned after moulded section.
3. a clip bending frock, it is characterized in that, comprise the clip ears mould for being pressed to clip ears part, described clip ears mould comprises the first top die and the first dip mold, described first dip mold is provided with and clip head, clip neck and corresponding the first forming tank to downward-extension of clip afterbody and correspond to clip ears part for the clip ears spacing supporting surface coordinated of thrust in a downward direction, described first top die is provided with the first pressure head with the first forming tank adaptation in the position corresponding up and down with the first forming tank.
4. clip bending frock according to claim 3, it is characterized in that, be provided with in described first forming tank for when clip base substrate puts into locating slot for contacting with the lower surface of clip base substrate and supporting the back-up block of clip base substrate, being provided with between the bottom land of described back-up block and the first forming tank can the elastic component of the material returned after moulded section.
5. the clip bending frock according to claim 3 or 4, it is characterized in that, described clip bending frock also comprises for carrying out the shaping U-shaped mould of neck flexion to the first base substrate, described U-shaped mould comprises the second top die and the second dip mold, described second dip mold is provided with the second forming tank that the left and right for coincideing with clip neck flexion radius extends, described second dip mold is also provided with in the longitudinal direction to the spacing position limiting structure in order to determine clip neck flexion position of the first base substrate block, described second top die is provided with for second forming tank suitable second pressure head identical with clip neck flexion radius.
6. clip bending frock according to claim 5, it is characterized in that, described second dip mold has and coordinates with the medial surface block of at least one clip ear corresponding to clip ears position, and for side spacing to the first base substrate on left and/or right direction.
7. clip bending frock according to claim 5, it is characterized in that, described clip bending frock also comprises for carrying out the shaping circular arc molding mould of pressing to clip afterbody, described circular arc molding mould comprises the 3rd top die and the 3rd dip mold, described 3rd top die comprises the plane press section for being flattened by clip afterbody and is used for keeping the circular arc press section of clip neck flexion part, and described 3rd dip mold is provided with the supporting plane for fitting with clip head.
8. clip bending frock according to claim 7, is characterized in that, described 3rd dip mold is rectangular block, and described supporting plane is the upper surface of rectangular block, and the upper surface of rectangular block is provided with the locating piece for coordinating with the front end block of the second base substrate.
9. clip bending frock according to claim 8, it is characterized in that, described rectangular block has and coordinates with the medial surface block of at least one clip ear corresponding to clip ears position, and on left and/or right direction to the side that the second base substrate is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684688.XA CN104399816B (en) | 2014-11-25 | 2014-11-25 | A kind of clip bending frock and clip ears mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684688.XA CN104399816B (en) | 2014-11-25 | 2014-11-25 | A kind of clip bending frock and clip ears mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104399816A true CN104399816A (en) | 2015-03-11 |
| CN104399816B CN104399816B (en) | 2017-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410684688.XA Active CN104399816B (en) | 2014-11-25 | 2014-11-25 | A kind of clip bending frock and clip ears mould |
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| Country | Link |
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| CN (1) | CN104399816B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110586759A (en) * | 2019-10-12 | 2019-12-20 | 哈尔滨工业大学 | Micro-bending and micro-punching composite forming device and forming method |
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| JP2004283838A (en) * | 2003-03-19 | 2004-10-14 | Honda Motor Co Ltd | Bender for long work |
| CN103028654A (en) * | 2011-09-29 | 2013-04-10 | 郝俊峰 | Clamp bend forming die |
| CN202701164U (en) * | 2012-07-31 | 2013-01-30 | 湖北鄂钢驰久钢板弹簧有限公司 | Steel plate spring clamp forming die |
| CN103611811A (en) * | 2013-11-15 | 2014-03-05 | 盐城工业职业技术学院 | Automatic ejection bending die |
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| CN110586759A (en) * | 2019-10-12 | 2019-12-20 | 哈尔滨工业大学 | Micro-bending and micro-punching composite forming device and forming method |
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| CN104399816B (en) | 2017-09-19 |
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