CN104525830B - Elbow expansion bolt manufacturing process - Google Patents
Elbow expansion bolt manufacturing process Download PDFInfo
- Publication number
- CN104525830B CN104525830B CN201410708488.3A CN201410708488A CN104525830B CN 104525830 B CN104525830 B CN 104525830B CN 201410708488 A CN201410708488 A CN 201410708488A CN 104525830 B CN104525830 B CN 104525830B
- Authority
- CN
- China
- Prior art keywords
- bolt
- flat
- punch die
- circular arc
- contracting
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
Abstract
The invention discloses an elbow expansion bolt manufacturing process. The elbow expansion bolt manufacturing process is characterized by comprising the following steps of 1 cutting a wire with required diameter according to the bolt length, 2 using a double-stroke cold heading machine to complete primary-punching and secondary- punching forging and pressing to head a step in the middle of a bolt; 3 using a contraction die to conduct tertiary-punching contraction and flattening on the wire with the headed step, 4 using a bending mechanism to conduct quartus punching the contracted and flattened wire to prepare an elbow. Meanwhile, the bending mechanism can prevent the bolt from having burr. The elbow expansion bolt manufacturing process is reasonable in process, efficient and safe in processing and stable and reliable in product and effectively avoids the problem that bolt burrs are produced and a workpiece is pulled out by a stamping die is effectively avoided.
Description
Technical field
The present invention relates to a kind of improvement invention of fastener manufacture craft, more particularly to a kind of making of elbow expansion bolt
The improvement invention of technique.
Background technology
In the prior art, the elbow of bolt with one end bent back is generally bended using inclined-plane, but when bolt head and inclined-plane shock, because
Impact is excessive and burr occurs in friction exertin conference.And in the flat operation of the contracting for preparing bolt with one end bent back, often occur " lot "
Problem, refers to that workpiece is swaged and pulls out, its reason be punch die contracting it is flat after frictional force, be far longer than friction of the former to bolt
Power, and solving lot sizing problem can use gauge or diameter of wire overstriking, while the scheme of former undergauge, although lot can be solved and asked
Topic, but gauge or diameter of wire overstriking, the manufacturing cost of bolt rise, and do not calculate very much economically.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies in the prior art, there is provided a kind of operation is simple efficiently, product
The manufacture craft of the safe and reliable elbow expansion bolt of product.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that to realize：This kind of elbow expanding screw
The manufacture craft of bolt, it is characterised in that：Including having the following steps, step one is long according to bolt by the wire rod of required diameter
Degree carries out blank；Step 2, the wire rod that will be cut completes the forging and stamping of a punching and two punchings with double header come in the middle of the good bolt of upsetting
Step；Step 3, by the wire rod of the good step of upsetting carried out with the flat mould of contracting three punchings contract it is flat；Step 4, the flat good wire rod that will contract is used
For elbow, the Clincher can prevent bolt from burr occur to the punching of Clincher four simultaneously；Wherein, three punching contracting it is flat charged and attacked with four it is curved
Without changing, energy double upsetting can directly bend the former of middle grip bolt after contracting is flat.
The Clincher includes the transmission device of circular arc slide unit and the slide unit movement of transmission circular arc, the circular arc slide unit
Circular arc be provided with circular arc sliding block, the circular arc sliding block is provided with hinge component, and is hinged with slide bar, the circular arc slide unit
Circular arc lower end be provided with support, support is provided with aperture, and the slide bar other end is removably set in aperture, and support
On be arranged with spring.
The Clincher includes mold base and the transmission device being connected with mold base, and the mold base front end is provided with company
Bar axle, is hinged with connecting rod on the pitman shaft, the connecting rod other end is provided with gap axle, and the gap matches with bolt head,
And gap axle is connected with gap axle back-moving spring, the gap axle back-moving spring other end is connected to mold base front lower portion, the mould
Tool seat bottom is provided with opening horizontal cavity facing forward, and pushing block is provided with cavity, and the pushing block is connected with connecting rod return spring, described
The connecting rod return spring other end is connected to cavity back wall, and the pushing block front end is connected with the headtree on connecting rod, the mould
Tool seat upper front end is provided with the Positioning screw of limiting rod rotational angle.
The Clincher includes the formpiston for being bended to bolt and the former for fixing bolt, described the moon
Mould is provided with bolt positioning hole, and the former below location hole is provided with swing rod axle, and swing rod is hinged with swing rod axle, and the swing rod is another
Single port bottom is set for inclined-plane, and swing rod and the upper surface of threaded bolt contacts are convex arc surface；Cavity is provided with the formpiston, it is empty
Accent is set towards former, and push rod is provided with cavity, and the push rod external port is set for inclined-plane, and is matched with the inclined-plane port of swing rod
Close, floating bracket is additionally provided with the cavity, spring is arranged with the push rod, spring one end connection cavity inner wall, spring is another
One end connects floating bracket.
The flat mould of contracting includes the former for carrying out the flat punch die of punch die contracting and bolt, and the former is provided with spiral shell
Bolt location hole, is socketed with punch die set on the punch die, the pushing block of red needle and fixed red needle is provided with the punch die set, the red needle
Front end is placed in punch die jaws, and the jaws front end is provided with the flat step of contracting, and elastic device, the elasticity are additionally provided with the punch die set
Device one end connection punch die set inwall, other end connection pushing block.
The elastic device is three spring A of mutual socket.
The beneficial effects of the invention are as follows the manufacture craft of the elbow expansion bolt after improvement, using the improved flat mould of contracting,
It is mutual to help, be oriented to each other by setting three spring A being mutually socketed in its punch die set, increase red needle and push away bolt
Go out the thrust of punch die jaws, solve the problems, such as that bolt is easily swaged extraction.By improved Clincher, can effectively reduce
Burr is eliminated with the impact and frictional force of bolt head.And need not more with the former of grip bolt needed for four punchings in three punchings
Change, energy double upsetting can directly bend after contracting is flat, very convenient, remove the danger that clamp workpiece rotates from.
Brief description of the drawings
Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 rushes structural representation for of the invention three.
Fig. 2 is the structural representation before the embodiment of the present invention one is forged.
Fig. 3 is the structural representation after the embodiment of the present invention one is forged.
Fig. 4 is the structural representation before the embodiment of the present invention two is forged.
Fig. 5 is the structural representation after the embodiment of the present invention two is forged.
Fig. 6 is the structural representation before the embodiment of the present invention three is forged.
Fig. 7 is the structural representation after the embodiment of the present invention three is forged.
Specific embodiment
Accompanying drawing illustrates structure of the invention, further illustrates it about details in conjunction with accompanying drawing below.The elbow expands
The manufacture craft of bolt, including have the following steps, step one is cut the wire rod of required diameter according to bolt length
Material；Step 2, the wire rod that will be cut completes the forging and stamping of a punching and two punchings with double header come the step in the middle of the good bolt of upsetting, its
Middle double header is prior art；Step 3, using the flat mould that specifically contracts carry out three punchings contracting it is flat, prevent background technology
The lot sizing problem of middle appearance；Step 4, by the contracting flat good wire rod punching of Clincher four for elbow, the Clincher is while energy
Prevent bolt from burr occur.Wherein, three punchings need not be changed with the former of grip bolt needed for four punchings, can double upsetting, contracting
Can directly be bended after flat, it is very convenient, remove the danger that clamp workpiece rotates from.
Wherein, the flat mould that contracts includes the former 2 for carrying out the flat punch die 7 of punch die contracting and bolt, is set on the former 2
There is bolt positioning hole 6, punch die set 1 is socketed with the punch die 7, be provided with red needle 3 in the punch die set 1 and fix pushing away for red needle 3
Block 4, the front end correspondence jaws of punch die 7 of the red needle 3, the jaws front end is provided with the flat step of contracting, flat for carrying out contracting to bolt, i.e. platform
Jaws width at rank is less than bolt width；Elastic device 5, the connection of the one end of the elastic device 5 are additionally provided with the punch die set 1
Punch die covers 1 inwall, other end connection pushing block 4；The elastic device 5 is three spring A of mutually socket.During work, bolt is put
In in the location hole 6 of former 2, bolt needs the flat one end of contracting to be placed towards the jaws direction of punch die 7, when punch die 7 towards the direction of former 2
During impact, the flat end of bolt contracting enters punch die jaws, and red needle is moved inward, and spring A shrinks, and the step at punch die opening contracts to bolt
Flat end carry out contracting it is flat, contract it is flat after the completion of, spring A reset, drive red needle 3 by bolt reduce the staff end release the jaws of punch die 7, wherein three
The mutually spring A of socket, helps mutually, is oriented to each other, increases the thrust to red needle 3, solves bolt and is easily swaged extraction
Problem.
Wherein, Clincher has following three kinds of implementation methods：
Embodiment one, the Clincher include the transmission device of circular arc slide unit 8 and the movement of transmission circular arc slide unit 8,
The circular arc of the circular arc slide unit 8 is provided with circular arc sliding block 9, and the circular arc sliding block 9 is provided with hinge component 10, and is hinged with
Slide bar 11, the circular arc lower end of the circular arc slide unit 8 is provided with support 13, and support 13 is provided with aperture, and the slide bar 11 is another
End is removably set in aperture, and spring 12 is arranged with support 13.During work, bolt head and the mechanism of circular arc sliding block 9
Circular arc sliding block 9 offsets, and transmission device drives the mechanism of circular arc sliding block 9 to be moved towards bolt head so that bolt head is slided with circular arc
Block 9 is moved down along the guide rail of circular arc slide unit 8, and then deformation bends, while the other end of slide bar 11 is moved down in aperture, spring 12 is received
Contracting, after the completion of operation of bending, sliding block 9 and slide bar 11 are resetted by spring 12.
Embodiment two, the Clincher include mold base 20 and the transmission device being connected with mold base 20, the mould
Tool seat 20 front end is provided with pitman shaft 17, and connecting rod 15 is hinged with the pitman shaft 17, and the other end of the connecting rod 15 is provided with gap axle
14, the gap matches with bolt head, and gap axle 14 is connected with gap axle back-moving spring 19, and gap axle back-moving spring 19 is another
One end is connected to the front lower portion of mold base 20, and the bottom of the mold base 20 is provided with opening horizontal cavity facing forward, is provided with cavity
Pushing block 21, the pushing block 21 is connected with connecting rod return spring 18, and the other end of connecting rod return spring 18 is connected to cavity back wall,
The front end of the pushing block 21 is connected with the headtree 22 on connecting rod 15, and the upper front end of the mold base 20 is provided with limiting rod 15
The Positioning screw 16 of rotational angle.During work, it is bolted on former, bolt head is placed in the gap of gap axle 14, passes
Pushed away before dynamic device driven mold seat 20, connecting rod 15 is rotated clockwise, and gap axle 14 is rotated counterclockwise, and realization is beaten bolt head
Curved, after completing, connecting rod 15 is resetted by connecting rod return spring 18 with the effect of pushing block 21, and gap axle 14 is answered by gap axle
The position effect of spring 19 is resetted.Because bolt head is tightly to be attached in the right-angle surface of gap, therefore the process that bolt is bent
In without friction and relative displacement, burr will not produce, stable working state reliability.
Embodiment three, the Clincher include formpiston 27 for being bended to bolt and for fixing bolt
Former 25, the former 25 is provided with bolt positioning hole 30, and the former 25 of the lower section of location hole 30 is provided with swing rod axle 29, swing rod axle
Be hinged with swing rod 28 on 29, the another port bottom of the swing rod 28 is that inclined-plane is set, and swing rod 28 and threaded bolt contacts upper surface
It is convex arc surface；Cavity is provided with the formpiston 27, cavity mouthful is set towards former 25, and push rod 26, the push rod are provided with cavity
26 external ports are set for inclined-plane, and are engaged with the inclined-plane port of swing rod 28, and floating bracket 24 is additionally provided with the cavity, described
Spring 23, the one end of spring 23 connection cavity inner wall, the other end of spring 23 connection floating bracket 24 are arranged with push rod 26.Work
When, when floating bracket 24 is ejected by spring 23, swing rod 28 is lain on the inclined-plane of push rod 26, when mechanism moves forward, branch of floating
Frame 24 bumps against the face of former 25 and then stops first, and push rod 26 is continued to move along, and its inclined-plane forces swing rod 28 to rotate clockwise,
Bolt head is bent from side；The free-falling of swing rod 28 during return, lies down on the inclined-plane of push rod 26 again, waits next spiral shell
Bolt.
In sum, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in of the invention
Within protection domain.
Claims (3)
1. a kind of manufacture craft of elbow expansion bolt, it is characterised in that：Including having the following steps, step one, by required diameter
The wire rod of size carries out blank according to bolt length；Step 2, the wire rod that will be cut double header completes a punching and two punchings
Forging and stamping come the good bolt of upsetting in the middle of step；Step 3, by the wire rod of the good step of upsetting carried out with the flat mould of contracting three punchings contract it is flat；Step
Four, by the contracting flat good wire rod punching of Clincher four for elbow, the Clincher can prevent bolt from burr occur simultaneously；Its
In, three rush the flat formers for charging and attacking curved middle grip bolt with four that contract need not change, and energy double upsetting can directly beat after contracting is flat
It is curved；The Clincher includes the transmission device of circular arc slide unit and the slide unit movement of transmission circular arc, the circle of the circular arc slide unit
Arc slide rail is provided with circular arc sliding block, and the circular arc sliding block is provided with hinge component, and is hinged with slide bar, the circle of the circular arc slide unit
Arc slide rail lower end is provided with support, and support is provided with aperture, and the slide bar other end is removably set in aperture, and is covered on support
It is provided with spring.
2. the manufacture craft of elbow expansion bolt as claimed in claim 1, it is characterised in that：The flat mould of the contracting include into
Punch die and the former of bolt that row punch die contracts flat, the former are provided with bolt positioning hole, punching are socketed with the punch die
Die sleeve, is provided with the pushing block of red needle and fixed red needle in the punch die set, the front end of the red needle is placed in punch die jaws, before the jaws
End is provided with the flat step of contracting, and elastic device is additionally provided with the punch die set, and elastic device one end connection punch die set inwall is another
End connection pushing block.
3. the manufacture craft of elbow expansion bolt as claimed in claim 2, it is characterised in that：The elastic device is mutual set
The three spring A for connecing.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610578186.8A CN106001381B (en) | 2014-12-01 | 2014-12-01 | A kind of manufacture craft of elbow expansion bolt |
| CN201610578185.3A CN106180534B (en) | 2014-12-01 | 2014-12-01 | A kind of manufacture craft of elbow expansion bolt |
| CN201410708488.3A CN104525830B (en) | 2014-12-01 | 2014-12-01 | Elbow expansion bolt manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410708488.3A CN104525830B (en) | 2014-12-01 | 2014-12-01 | Elbow expansion bolt manufacturing process |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610578185.3A Division CN106180534B (en) | 2014-12-01 | 2014-12-01 | A kind of manufacture craft of elbow expansion bolt |
| CN201610578186.8A Division CN106001381B (en) | 2014-12-01 | 2014-12-01 | A kind of manufacture craft of elbow expansion bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104525830A CN104525830A (en) | 2015-04-22 |
| CN104525830B true CN104525830B (en) | 2017-05-24 |
Family
ID=52841561
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410708488.3A Active CN104525830B (en) | 2014-12-01 | 2014-12-01 | Elbow expansion bolt manufacturing process |
| CN201610578185.3A Active CN106180534B (en) | 2014-12-01 | 2014-12-01 | A kind of manufacture craft of elbow expansion bolt |
| CN201610578186.8A Active CN106001381B (en) | 2014-12-01 | 2014-12-01 | A kind of manufacture craft of elbow expansion bolt |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610578185.3A Active CN106180534B (en) | 2014-12-01 | 2014-12-01 | A kind of manufacture craft of elbow expansion bolt |
| CN201610578186.8A Active CN106001381B (en) | 2014-12-01 | 2014-12-01 | A kind of manufacture craft of elbow expansion bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN104525830B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106607539A (en) * | 2015-10-27 | 2017-05-03 | 陕西宏远航空锻造有限责任公司 | Horizontal-forging forming method for martensitic stainless steel |
| CN106040939A (en) * | 2016-07-07 | 2016-10-26 | 浙江鼎盛汽车紧固件有限公司 | Screw rod positioning and buffering cold upsetting mold |
| CN106583618A (en) * | 2016-12-05 | 2017-04-26 | 中国航空工业标准件制造有限责任公司 | Continuous trimming combined die |
| CN108515137A (en) * | 2018-03-27 | 2018-09-11 | 宁波世裕五金电器有限公司 | A kind of manufacturing method of cold forging high-strength stainless steel setscrew |
| CN109909685B (en) * | 2019-01-24 | 2021-08-03 | 上海窗固紧固件制造有限公司 | Manufacturing method of elbow screw |
| CN114888224B (en) * | 2022-04-28 | 2022-12-23 | 泰州市华驰不锈钢制品有限公司 | Cold header for steel wire hoop machine-shaping |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60137537A (en) * | 1983-12-26 | 1985-07-22 | Aisin Seiki Co Ltd | Die for roll forging |
| GB8912482D0 (en) * | 1989-05-31 | 1989-07-19 | Unifix Ltd | Anchors |
| CN2260677Y (en) * | 1995-01-10 | 1997-08-27 | 陶友勤 | One-time forming mould for triming and reducing stem of screw bolt |
| KR100338020B1 (en) * | 1999-09-15 | 2002-05-24 | 정재순 | The elbow manufacture device by a virbrate pressure |
| CN2762908Y (en) * | 2004-07-28 | 2006-03-08 | 比亚迪股份有限公司 | Edge-reversing formation type pendulum mechanism |
| JP2006136915A (en) * | 2004-11-11 | 2006-06-01 | Toyota Motor Corp | Method for working bolt base-stock, bolt base-stock and die for working bolt base-stock |
| CN1686635A (en) * | 2005-04-28 | 2005-10-26 | 东莞洪梅全厚五金塑胶制品有限公司 | Processing method of hardware hexagonal screw |
| JP4673740B2 (en) * | 2005-12-26 | 2011-04-20 | 西尾精密株式会社 | Buffer structure of cold forging die |
| CN201064816Y (en) * | 2007-06-21 | 2008-05-28 | 上海上标汽车紧固件有限公司 | Special-purpose hinge pin bolt forming die |
| CN201760547U (en) * | 2010-05-26 | 2011-03-16 | 上海上标汽车紧固件有限公司 | Cold forging mould for suspension bolt of saloon car body |
| CN201855909U (en) * | 2010-06-25 | 2011-06-08 | 富奥汽车零部件股份有限公司 | Female die for molding head part of external plum blossom flange type bolt |
| CN201889381U (en) * | 2010-11-09 | 2011-07-06 | 键铭金属工业有限公司 | Linkage mechanism of nail head forming machine |
| CN102615156B (en) * | 2012-03-21 | 2014-01-15 | 梁首强 | Method for bending metal pipe as well as equipment for implementing method |
| CN202683688U (en) * | 2012-06-20 | 2013-01-23 | 亿和精密金属制品(深圳)有限公司 | Swing block type bending device |
| CN202701059U (en) * | 2012-07-12 | 2013-01-30 | 漳州永裕隆精密五金有限公司 | U-shaped oscillating bending die |
-
2014
- 2014-12-01 CN CN201410708488.3A patent/CN104525830B/en active Active
- 2014-12-01 CN CN201610578185.3A patent/CN106180534B/en active Active
- 2014-12-01 CN CN201610578186.8A patent/CN106001381B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106180534A (en) | 2016-12-07 |
| CN106001381B (en) | 2017-07-28 |
| CN106001381A (en) | 2016-10-12 |
| CN106180534B (en) | 2018-01-02 |
| CN104525830A (en) | 2015-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104525830B (en) | Elbow expansion bolt manufacturing process | |
| CN204320976U (en) | The side blow mechanism of diel | |
| CN201603768U (en) | Equipment for forming teeth in workpiece blanks through extrusion | |
| CN103801623B (en) | Bending stamping mould | |
| CN103831332A (en) | Pipe-bending machine for automatically machining pipe fittings and machining method of pipe-bending machine | |
| CN109365639A (en) | Cupping tool with adjustable constant force elastic blank holding mechanism | |
| CN107442729B (en) | Forging and pressing mould for automobile half shaft | |
| CN212494682U (en) | Bending die and tapered wedge thereof | |
| CN210547727U (en) | Automatic forming equipment for stainless steel bending spring | |
| CN104107852B (en) | For the frock of copper pipe indent | |
| CN109226389B (en) | Pipe bending machine | |
| CN215039428U (en) | Nozzle plastic mould location structure | |
| CN212551399U (en) | Elbow pipe whole-opening clamping assembly of elbow pipe mechanism of automatic thin-wall short U elbow pipe forming machine | |
| CN213559375U (en) | Transmission device for upper and lower punching dies of one-die two-die screw heading machine | |
| CN202224503U (en) | Punching and bending integrated machine | |
| CN214022979U (en) | Progressive die structure for preventing riveting point from punching through | |
| TW201036731A (en) | Washer manufacturing method | |
| TWI313201B (en) | ||
| CN108326145A (en) | A kind of compound punching molding die of hinge | |
| CN207222847U (en) | A kind of rivet driver | |
| CN109986332B (en) | Withhold mechanism of machine | |
| CN107962143B (en) | Pin shaft heading machine | |
| CN108580597B (en) | U-shaped part shaping manipulator | |
| CN206122432U (en) | Pipe bending mechanism of short U return bend automatic molding machine of thin wall | |
| CN108817224B (en) | Die for shaping U-shaped part |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Five Lin Industrial Zone Tangxia town Ruian city Wenzhou City, Zhejiang province 325200 field bridge Patentee after: Zhejiang Keteng Precision Machinery Co., Ltd Address before: Five Lin Cun Tangxia town Ruian city Wenzhou City, Zhejiang province 325200 field bridge Patentee before: WENZHOU KETENG FASTENER CO., LTD. |
|
| CP03 | Change of name, title or address |