CN106862393A - A kind of bending die tool for being provided with tiltedly sliding cavity plate - Google Patents
A kind of bending die tool for being provided with tiltedly sliding cavity plate Download PDFInfo
- Publication number
- CN106862393A CN106862393A CN201710232061.4A CN201710232061A CN106862393A CN 106862393 A CN106862393 A CN 106862393A CN 201710232061 A CN201710232061 A CN 201710232061A CN 106862393 A CN106862393 A CN 106862393A
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- China
- Prior art keywords
- workpiece
- cavity plate
- tiltedly
- oblique
- sliding cavity
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- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a kind of bending die tool for being provided with tiltedly sliding cavity plate, including upper mould (1), lower mould (2).The lower mould that the present invention is used is provided with oblique slide, tiltedly slide cavity plate, concave template, lower mould support plate and ejector spring, during work, upper mould is pushed, A workpiece are with oblique sliding cavity plate from top to bottom in the die cavity for slipping into concave template, A workpiece bent into shape is downwards B workpiece by the punch-pin of upper mould, afterwards, upper mould resets upwards, in the presence of ejector spring, tiltedly sliding cavity plate is moved to the left while upward pushing tow B workpiece depart from concave template, B workpiece are caused to take off the technical scheme for hooking and being separate with concave template with oblique sliding cavity plate simultaneously, have bending die and be provided with the metal plate A workpiece of raised flanging bore to the processing of B workpiece in curved 90 ° at bent face for rushing, mitigation working strength is reached, improve production efficiency, the purpose for avoiding workpiece impaired.
Description
Technical field
The present invention relates to a kind of bending die tool, specifically refer to be provided with oblique cunning for one kind of bending ram shaping sheet metal product
The bending die tool of cavity plate.
Background technology
If the punch forming of sheet metal product is generally needed by arterial highway stamping procedure, for the ease of statement, herein will be numerous
The metal plate semi-products of former and later two the adjacent operations in stamping procedure, are sequentially briefly referred to as A workpiece and B workpiece；Bending die has
It is a kind of stamping mold that A workpiece are shaped to B workpiece by bending ram.
For the A workpiece that raised flanging bore is provided with interior bent face, refering to Fig. 4 and Fig. 5, the bending die of prior art has A
Workpiece rushes curved 90 ° and is shaped to after B workpiece, and described flanging bore meeting hooking is coated on and the demoulding is difficult at cavity plate, therefore, existing skill
Art sets push pedal using the elastic characteristic of Metal plate at cavity plate, and motor-driven forced stripper mechanism is carried out to B workpiece, or by manually borrowing
Assistant engineer's tool is manually prized the demoulding to B workpiece, no matter motor-driven forced stripper mechanism or manually prizes the demoulding, all can be to some extent
The flanging bore of B workpiece is damaged, additionally, manually prizing the demoulding, working strength is big, low production efficiency；Therefore, there is work in prior art
Make that intensity is big, low production efficiency, the easily vulnerable problems and shortcomings of workpiece.
The content of the invention
For the problems and shortcomings that above-mentioned prior art is present, the present invention uses the device being made up of upper die and lower die, on
Mould is provided with mould support plate, punch-pin, holding pad and rag iron spring；Lower mould is provided with oblique slide, tiltedly slides cavity plate, concave template, lower mould support plate
And ejector spring, wherein, concave template is provided with the die cavity for coordinating punch-pin press-bending A workpiece right parts, and the upper edge hole of the die cavity is provided with embedding
Close the type groove of A workpiece left part profiles；The right flank of oblique slide is provided with the oblique chute being tilted to the right from top to bottom, tiltedly a left side for sliding cavity plate
Side is provided with the oblique slide rail being tilted to the right from top to bottom, and the oblique slide rail is corresponding with oblique chute to be slidably matched；Concave template is fixed on
Above lower mould support plate, oblique slide is located at the inner left wall of the die cavity and is fixedly connected with above lower mould support plate, tiltedly slides recessed
Mould is slided with oblique slide and is fastened and connected through the oblique slide rail, oblique chute, and ejector spring is located between lower mould support plate and tiltedly sliding cavity plate；
Initial state, is acted on by ejector spring, and the upper edge hole of the die cavity of concave template is tiltedly protruded from above sliding cavity plate；
During work, A workpiece are placed in above tiltedly sliding cavity plate, and upper mould is pushed, and first, be compressed on for A workpiece by the holding pad of upper mould
Tiltedly above sliding cavity plate, afterwards, holding pad through A workpiece drive tiltedly sliding cavity plate along the oblique slide rail, oblique chute from top to bottom to the right
Slip into the die cavity, now, tiltedly flushed with above concave template above sliding cavity plate, the type groove of A workpiece and concave template
Chimeric, ejector spring is compressed simultaneously with rag iron spring, and it is B workpiece that punch-pin extends downwardly from holding pad by A workpiece bent into shape,
Afterwards, upper mould resets upwards, in the presence of ejector spring and rag iron spring, punch-pin is retracted holding pad upwards, tiltedly sliding cavity plate
Then skid off the die cavity to the left from bottom to top above, tiltedly sliding cavity plate while upward pushing tow B workpiece depart from concave template to moving to left
It is dynamic, cause B workpiece to be taken off with concave template with oblique sliding cavity plate simultaneously by the die cavity and the collective effect of oblique sliding cavity plate and hook separate technology
Scheme, there is provided a kind of bending die tool for being provided with tiltedly sliding cavity plate, it is intended to make bending die have for rushing curved 90 °, be provided with convex at interior bent face
The processing of flanging bore sheet metal work is played, is reached and is mitigated working strength, improve production efficiency, avoids the impaired purpose of workpiece.
The object of the present invention is achieved like this：A kind of bending die tool for being provided with tiltedly sliding cavity plate, including upper die and lower die, its
In：Described upper mould is provided with mould support plate, punch-pin, holding pad and rag iron spring；Described lower mould be provided with oblique slide, tiltedly slide it is recessed
Mould, concave template, lower mould support plate and ejector spring, wherein, the oblique slide is trapezoidal block steel components, the right side of oblique slide
Face be provided be tilted to the right from top to bottom, the oblique chute that cross section is in T shape；The oblique sliding cavity plate is trapezoidal block steel structure
Part, the left surface for tiltedly sliding cavity plate is provided with the oblique slide rail being slidably matched corresponding with the oblique chute that is tilted to the right from top to bottom, tiltedly sliding
The type face for being fitted together to A workpiece left part shapes is provided with above cavity plate, when tiltedly the right flank of sliding cavity plate is provided with bending A workpiece, is used
In the step of the raised flanging bore for avoiding A workpiece；The concave template is the steel components of rectangular block shape, and it is convex that concave template is provided with cooperation
The die cavity of curved A workpiece right part is molded, the upper edge hole of the die cavity is provided with the type groove of chimeric A workpiece left part profile；The lower mould is carried
Plate is the steel components of rectangular block shape；The ejector spring is the compression elastic element of abbreviation nitrogen spring；
Concave template is fixed on above lower mould support plate, oblique slide be located at the die cavity inner left wall at and with lower mould support plate
Above be fixedly connected, tiltedly sliding cavity plate is slided through the oblique slide rail, oblique chute and oblique slide and is fastened and connected, and ejector spring is located at down
Between mould support plate and tiltedly sliding cavity plate；
Initial state, is acted on by ejector spring, and the upper edge of the die cavity of concave template is tiltedly protruded from above sliding cavity plate
Mouthful.
Operation principle and beneficial effect
Using when, positioned at the top of lower mould, upper mould is fixedly connected on below press walking beam upper mould correspondence, and lower mould is fixed
It is connected to above press bed.
During work, A workpiece are placed in above tiltedly sliding cavity plate, and upper mould is pushed, and first, be compressed on for A workpiece by the holding pad of upper mould
Tiltedly above sliding cavity plate, afterwards, holding pad through A workpiece drive tiltedly sliding cavity plate along the oblique slide rail, oblique chute from top to bottom to the right
Slip into the die cavity, now, tiltedly flushed with above concave template above sliding cavity plate, the type groove of A workpiece and concave template
Chimeric, ejector spring is compressed simultaneously with rag iron spring, and punch-pin is extended downwardly from along the guide hole of holding pad, by A workpiece described
Bent into shape is B workpiece in die cavity, and afterwards, upper mould resets upwards, and under rag iron spring, the promotion of ejector spring, punch-pin edge is led
Hole is retracted holding pad upwards, and tiltedly then oblique to the left from bottom to top above sliding cavity plate to skid off the die cavity, tiltedly sliding cavity plate is upward
Pushing tow B workpiece are moved to the left while departing from concave template, by the die cavity and the collective effect of oblique sliding cavity plate, cause B workpiece simultaneously
Separated with oblique sliding cavity plate with the de- hook of concave template.
Present apparatus simple structure, reliable operation, by the top obliquely of oblique sliding cavity plate, makes to be provided with the workpiece of raised flanging bore
Be able to it is automatic de- hook the demoulding, bending die is had for the processing rushed curved 90 °, raised flanging bore sheet metal work is provided with interior bent face,
Alleviate working strength, improve production efficiency, avoid workpiece be damaged.
It is above-mentioned, the present invention using the device that is made up of upper die and lower die, upper mould be provided with mould support plate, punch-pin, holding pad and
Rag iron spring；Lower mould is provided with oblique slide, tiltedly slides cavity plate, concave template, lower mould support plate and ejector spring, wherein, concave template is provided with matches somebody with somebody
The die cavity of punch-pin press-bending A workpiece right parts is closed, the upper edge hole of the die cavity is provided with the type groove of chimeric A workpiece left part profile；Oblique slide
Right flank be provided with the oblique chute being tilted to the right from top to bottom, tiltedly the left surface of sliding cavity plate is provided be tilted to the right from top to bottom oblique
Slide rail, the oblique slide rail is corresponding with oblique chute to be slidably matched；Concave template is fixed on above lower mould support plate, and oblique slide is located at described
The inner left wall of die cavity and it is fixedly connected with above lower mould support plate, tiltedly sliding cavity plate is through the oblique slide rail, oblique chute and oblique slide
Slip is fastened and connected, and ejector spring is located between lower mould support plate and tiltedly sliding cavity plate；Initial state, is acted on by ejector spring, tiltedly
The upper edge hole of the die cavity of concave template is protruded from above sliding cavity plate；
During work, A workpiece are placed in above tiltedly sliding cavity plate, and upper mould is pushed, and first, be compressed on for A workpiece by the holding pad of upper mould
Tiltedly above sliding cavity plate, afterwards, holding pad through A workpiece drive tiltedly sliding cavity plate along the oblique slide rail, oblique chute from top to bottom to the right
Slip into the die cavity, now, tiltedly flushed with above concave template above sliding cavity plate, the type groove of A workpiece and concave template
Chimeric, ejector spring is compressed simultaneously with rag iron spring, and it is B workpiece that punch-pin extends downwardly from holding pad by A workpiece bent into shape,
Afterwards, upper mould resets upwards, in the presence of ejector spring and rag iron spring, punch-pin is retracted holding pad upwards, tiltedly sliding cavity plate
Then skid off the die cavity to the left from bottom to top above, tiltedly sliding cavity plate while upward pushing tow B workpiece depart from concave template to moving to left
It is dynamic, cause B workpiece to be taken off with concave template with oblique sliding cavity plate simultaneously by the die cavity and the collective effect of oblique sliding cavity plate and hook separate technology
Scheme, overcomes prior art and has that working strength is big, low production efficiency, the easily vulnerable problems and shortcomings of workpiece, is provided
A kind of bending die tool for being provided with tiltedly sliding cavity plate, bending die is had for rushing curved 90 °, be provided with raised flanging bore metal plate at interior bent face
The processing of workpiece, has reached and has mitigated working strength, improve production efficiency, avoids the impaired purpose of workpiece.
Brief description of the drawings
Fig. 1 is a kind of main view cross section structure diagram of bending die tool for being provided with tiltedly sliding cavity plate of the invention；In figure, A works
Part 01 is placed in above tiltedly sliding cavity plate 22；
Fig. 2 is a kind of bending die tool for being provided with tiltedly sliding cavity plate of the invention, is operated in punch-pin 12 by the bent into shape of A workpiece 01
It is the principle schematic of the tense of B workpiece 02；
Fig. 3 is a kind of bending die tool for being provided with tiltedly sliding cavity plate of the invention, is operated in B workpiece 02 and slides cavity plate 22 with oblique simultaneously
It is de- with concave template 23 to hook the principle schematic for separating tense；
Fig. 4 is a kind of schematic diagram of A workpiece 01；
Fig. 5 is a kind of schematic diagram of B workpiece 02.
Embodiment in below in conjunction with the accompanying drawings is described in further detail to the present invention, but should not be construed as to of the invention
Any limitation.
In figure：Upper mould 1, upper mould support plate 11, punch-pin 12, holding pad 13, rag iron spring 14, lower mould 2, tiltedly oblique slide 21, cunning
Cavity plate 22, concave template 23, die cavity 231, lower mould support plate 24, ejector spring 25, A workpiece 01, B workpiece 02.
Specific embodiment
Refering to Fig. 1~Fig. 3, a kind of bending die tool for being provided with tiltedly sliding cavity plate of the invention, including upper mould 1, lower mould 2, wherein：
Described upper mould 1 is provided with mould support plate 11, punch-pin 12, holding pad 13 and rag iron spring 14；Described lower mould 2 is provided with oblique slide
21st, cavity plate 22, concave template 23, lower mould support plate 24 and ejector spring 25 are tiltedly slided, wherein, the oblique slide 21 is trapezoidal block steel
Texture part, the right flank of oblique slide 21 be provided be tilted to the right from top to bottom, the oblique chute that cross section is in T shape；It is described tiltedly sliding recessed
Mould 22 is trapezoidal block steel components, and tiltedly the left surface of sliding cavity plate 22 is provided with and be tilted to the right from top to bottom and the oblique chute
The oblique slide rail that correspondence is slidably matched, is tiltedly provided with the type face for being fitted together to the left part shape of A workpiece 01 above sliding cavity plate 22, tiltedly slide recessed
When the right flank of mould 22 is provided with bending A workpiece 01, the step of the raised flanging bore for avoiding A workpiece 01；The concave template 23
It is the steel components of rectangular block shape, concave template 23 is provided with the die cavity 231 for coordinating the right part of 12 press-bending A workpiece of punch-pin 01, the die cavity
231 upper edge hole is provided with the type groove of the left part profile of chimeric A workpiece 01；The lower mould support plate 24 is the steel components of rectangular block shape；
The ejector spring 25 is the compression elastic element of abbreviation nitrogen spring；
Concave template 23 is fixed on above lower mould support plate 24, oblique slide 21 be located at the die cavity 231 inner left wall at and
It is fixedly connected with above lower mould support plate 24, tiltedly sliding cavity plate 22 slides the company of fastening through the oblique slide rail, oblique chute and oblique slide 21
Connect, ejector spring 25 is located between lower mould support plate 24 and tiltedly sliding cavity plate 22；
Initial state, is acted on by ejector spring 25, and the die cavity of concave template 23 is tiltedly protruded from above sliding cavity plate 22
231 upper edge hole.
Operation principle and beneficial effect
Using when, positioned at the top of lower mould 2, upper mould 1 is fixedly connected on below press walking beam the correspondence of upper mould 1, lower mould 2
It is fixedly connected on above press bed.
During work, A workpiece 01 are placed in above tiltedly sliding cavity plate 22, and upper mould 1 is pushed, and first, the holding pad 13 of upper mould 1 is by A works
Part 01 is compressed on above tiltedly sliding cavity plate 22, afterwards, holding pad 13 through A workpiece 01 drive tiltedly sliding cavity plate 22 along the oblique slide rail,
Oblique chute is slipped into the right in the die cavity 231 from top to bottom, now, tiltedly above sliding cavity plate 22 with concave template 23 above it is neat
Flat, A workpiece 01 are chimeric with the type groove of concave template 23, and ejector spring 25 is compressed simultaneously with rag iron spring 14, punch-pin 12
Extended downwardly from along the guide hole of holding pad 13, by A workpiece 01, bent into shape is B workpiece 02, afterwards, upper mould 1 in the die cavity 231
Reset upwards, under rag iron spring 14, the promotion of ejector spring 25, punch-pin 12 is tiltedly slided recessed along guide hole retraction holding pad 13 upwards
Then oblique to the left from bottom to top above mould 22 to skid off the die cavity 231, tiltedly sliding cavity plate 22 departs from recessed in upward pushing tow B workpiece 02
It is moved to the left while template 23, by the die cavity 231 and the collective effect of oblique sliding cavity plate 22, causes B workpiece 02 simultaneously sliding with oblique
Cavity plate 22 takes off hook and separates with concave template 23.
Present apparatus simple structure, reliable operation, by the top obliquely of oblique sliding cavity plate 22, makes to be provided with the work of raised flanging bore
Part be able to it is automatic de- hook the demoulding, make bending die have for rush curved 90 °, be provided with interior bent face raised flanging bore sheet metal work plus
Work, alleviate working strength, improve production efficiency, avoid workpiece be damaged.
Claims (1)
1. a kind of bending die for being provided with tiltedly sliding cavity plate has, including upper mould (1), lower mould (2), it is characterised in that：Described lower mould (2)
It is provided with oblique slide (21), tiltedly slides cavity plate (22), concave template (23), lower mould support plate (24) and ejector spring (25), wherein, it is described oblique
Slide (21) is trapezoidal block steel components, the right flank of oblique slide (21) be provided be tilted to the right from top to bottom, cross section is in T
The oblique chute of font；The oblique sliding cavity plate (22) is trapezoidal block steel components, tiltedly slide cavity plate (22) left surface be provided with by
On incline corresponding with the oblique chute oblique slide rail being slidably matched downwardly and to the right, be tiltedly provided with for embedding above sliding cavity plate (22)
The type face of A workpiece (01) left part shape is closed, when the right flank for tiltedly sliding cavity plate (22) is provided with bending A workpiece (01), for avoiding A works
The step of the raised flanging bore of part (01)；The concave template (23) is the steel components of rectangular block shape, and concave template (23) is provided with matches somebody with somebody
The die cavity (231) of punch-pin (12) press-bending A workpiece (01) right part is closed, the upper edge hole of the die cavity (231) is provided with chimeric A workpiece (01)
The type groove of left part profile；The lower mould support plate (24) is the steel components of rectangular block shape；The ejector spring (25) is abbreviation nitrogen
The compression elastic element of gas spring；
Concave template (23) is fixed on above lower mould support plate (24), inner left wall of the oblique slide (21) positioned at the die cavity (231)
Place and it is fixedly connected with above lower mould support plate (24), tiltedly slides cavity plate (22) through the oblique slide rail, oblique chute and oblique slide (21)
Slip is fastened and connected, and ejector spring (25) is between lower mould support plate (24) and oblique sliding cavity plate (22)；
Initial state, by the effect of ejector spring (25), tiltedly slides the mould that concave template (23) is protruded from above cavity plate (22)
The upper edge hole of groove (231).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232061.4A CN106862393A (en) | 2017-03-29 | 2017-03-29 | A kind of bending die tool for being provided with tiltedly sliding cavity plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710232061.4A CN106862393A (en) | 2017-03-29 | 2017-03-29 | A kind of bending die tool for being provided with tiltedly sliding cavity plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106862393A true CN106862393A (en) | 2017-06-20 |
Family
ID=59163011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710232061.4A Pending CN106862393A (en) | 2017-03-29 | 2017-03-29 | A kind of bending die tool for being provided with tiltedly sliding cavity plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN106862393A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109013909A (en) * | 2018-09-19 | 2018-12-18 | 上海晨昌精密模具有限公司 | A kind of hollow part pneumatics bending and molding class progressive die |
| CN109047359A (en) * | 2018-08-01 | 2018-12-21 | 宁国市挚友合金钢材料有限公司 | It is a kind of can automatic dismantling workpiece machinery production universal mold |
| CN110280628A (en) * | 2019-06-27 | 2019-09-27 | 安徽博牧新材料科技有限公司 | A kind of 90 degree of molding dies of automatic material separator formula for work pieces process |
| CN111601670A (en) * | 2018-03-15 | 2020-08-28 | 宝马股份公司 | Mold for molding and method for manufacturing component |
| CN112845760A (en) * | 2020-12-18 | 2021-05-28 | 江西省天奇汽车零部件有限公司 | Die pressing device |
| CN114082845A (en) * | 2021-11-17 | 2022-02-25 | 浙江安吉银龙金属构件制造有限公司 | Intelligent connection automatic production system for highway protective net accessories |
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| US7021097B1 (en) * | 2000-02-10 | 2006-04-04 | Hutchinson Technology Incorporated | Method for adjusting a head suspension parameter |
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| CN105436315A (en) * | 2015-12-21 | 2016-03-30 | 贵阳航空电机有限公司 | Improvement structure of bending die for thin-wall housing part |
| CN205217685U (en) * | 2015-12-29 | 2016-05-11 | 万盛兴精密技术（惠州）有限公司 | Novel mould structure that overhead kick was bent |
| CN206662077U (en) * | 2017-03-29 | 2017-11-24 | 宁波双林汽车部件股份有限公司 | A kind of bending die tool for being provided with tiltedly sliding cavity plate |
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| JPS53119775A (en) * | 1977-03-30 | 1978-10-19 | Hitachi Ltd | Bender used for press |
| US7021097B1 (en) * | 2000-02-10 | 2006-04-04 | Hutchinson Technology Incorporated | Method for adjusting a head suspension parameter |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111601670A (en) * | 2018-03-15 | 2020-08-28 | 宝马股份公司 | Mold for molding and method for manufacturing component |
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| CN111601670B (en) * | 2018-03-15 | 2023-08-01 | 宝马股份公司 | Mold for molding and method for manufacturing a component |
| CN109047359A (en) * | 2018-08-01 | 2018-12-21 | 宁国市挚友合金钢材料有限公司 | It is a kind of can automatic dismantling workpiece machinery production universal mold |
| CN109013909A (en) * | 2018-09-19 | 2018-12-18 | 上海晨昌精密模具有限公司 | A kind of hollow part pneumatics bending and molding class progressive die |
| CN110280628A (en) * | 2019-06-27 | 2019-09-27 | 安徽博牧新材料科技有限公司 | A kind of 90 degree of molding dies of automatic material separator formula for work pieces process |
| CN112845760A (en) * | 2020-12-18 | 2021-05-28 | 江西省天奇汽车零部件有限公司 | Die pressing device |
| CN112845760B (en) * | 2020-12-18 | 2022-05-31 | 江西省天奇汽车零部件有限公司 | Die pressing device |
| CN114082845A (en) * | 2021-11-17 | 2022-02-25 | 浙江安吉银龙金属构件制造有限公司 | Intelligent connection automatic production system for highway protective net accessories |
| CN114082845B (en) * | 2021-11-17 | 2024-05-03 | 广州祥峰通信工程有限公司 | Intelligent connecting line automatic production system for highway protective net fittings |
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Application publication date: 20170620 |