CN102145443A - Method for processing U-shaped bolts - Google Patents
Method for processing U-shaped bolts Download PDFInfo
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- CN102145443A CN102145443A CN 201010106566 CN201010106566A CN102145443A CN 102145443 A CN102145443 A CN 102145443A CN 201010106566 CN201010106566 CN 201010106566 CN 201010106566 A CN201010106566 A CN 201010106566A CN 102145443 A CN102145443 A CN 102145443A
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- screw plate
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000012545 processing Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 49
- 238000005096 rolling process Methods 0.000 claims abstract description 26
- 238000005452 bending Methods 0.000 claims abstract description 24
- 238000003672 processing method Methods 0.000 claims abstract description 23
- 238000007493 shaping process Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 238000005491 wire drawing Methods 0.000 claims description 9
- 230000003466 anti-cipated effect Effects 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000005555 metalworking Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 abstract description 6
- 238000012797 qualification Methods 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 abstract 1
- 238000002407 reforming Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008034 disappearance Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
The invention relates to a method for processing U-shaped bolts, which comprises the following steps: a step 1 of blanking, i.e. cutting a round steel straight material into a plurality of sections of short materials on a punch press; a step 2 of thread rolling, i.e. carrying out thread rolling processing on both ends of the obtained short materials to form the short materials with tooth-shaped screw threads; and a step 3 of punching and bending, i.e. positioning the short materials of which both ends are provided with the tooth-shaped screw threads in dies and bending the short materials into U-shaped bolt workpieces through punching forming. The step of punching and bending further comprises the following steps: a step 3.1 of bending and forming, i.e. positioning the short materials of which both ends are provided with the tooth-shaped screw threads into the dies and bending the short materials into the U-shaped bolt workpieces; and a step 3.2 of shaping, i.e. reforming the U-shaped bolt workpieces which are subjected to bending and forming in the step 3.1 through shaping dies so that the U-shaped bolt workpieces meet the requirements of the bolt workpieces on the specification. Both the appearance quality and the size precision of the U-shaped bolt product produced by the processing method can meet the requirements of a client. The first-time qualification rate of the products in the continuous production each time can be higher than 98 percent.
Description
Technical field
The present invention relates to a kind of processing method of U bolt.
Background technology
U bolt is widely used in the pipe arrangement construction, and in the fields such as pipeline installation and architectural hardware, it is to use as a kind of securing member.Because various pipes and structural member are various, so the specification of U bolt and kind also increase thereupon.Seem simple U bolt, but will guarantee two bolt centre-to-centre spacing P, cooperate caliber A (comprising circularity), the required precision of height H and all sizes of C but is not simple! Because the difference of material and the multiple factors such as resilience of punching press, technology according to routine is made: blanking---bolt processing--dashes curved, can't guarantee size center distance P fully, curved footpath A (comprising circularity), the requirement of height H and reach C, even product distortion distortion.
Summary of the invention
The invention provides a kind of processing method of U bolt, the U bolt that this method is processed into can guarantee center distance P, curved footpath A (comprising circularity), and the dimension precision requirement of height H and reach C can not produce the product distortion distortion.
In order to achieve the above object, the invention provides a kind of processing method of U bolt, comprise:
Step 1, blanking directly expects to cut into the short material of plurality of sections with round steel on punch press;
Step 2, thread rolling is processed into the short material with profile of tooth screw thread with the short two ends thread rolling of expecting that step 1 obtains;
Step 3 is dashed curvedly, and the weak point that two ends are had a profile of tooth screw thread is anticipated the position and gone in the mould, is bent into the U bolt workpiece by drawing;
Describedly dash curved step and further comprise:
Step 3.1, bending forming, the weak point that two ends are had a profile of tooth screw thread are anticipated the position and are gone in the mould, are bent into the U bolt workpiece;
Step 3.2, shaping by shaping mould, makes the U bolt workpiece of step 3.1 bending forming be shaped once more, reaches the specification requirement of bolt workpiece.
The bending forming operation of described step 3.1 adopts hydraulic press to finish by the hydroforming method.
Described shaping mould is according to the design of the springback angle of step 3.1 gained U bolt workpiece.
In the thread rolling step of described step 2, adopt screw plate that short material is carried out thread rolling processing;
Described screw plate comprises fixedly screw plate and movable screw plate, and described fixedly screw plate and movable screw plate all have the toothed tool face.
Also be provided with the inclined-plane on the described fixedly screw plate, this inclined-plane is the roll importing position of thread rolling processing of short material.
Have between the inclined-plane of described fixedly screw plate and its plane and import angle α, the scope of this angle [alpha] be 1 °～2 ° 30 '; The projected length L on described inclined-plane is L=(2～4) π d
In(d
InBe the pitch diameter of thread).
Described thread rolling step also further comprises: in the thread rolling process, add metalworking fluid.
Also comprise before described step 1 blanking: the material step is opened in wire drawing and straightening;
Described drawing step is meant that charging round steel material adopts wire drawing machine, obtains plate-like round steel wire material through the wire drawing program, and the diameter of this plate-like round steel wire material meets the requirement of bolt outside diameter d;
Described straightening is opened and is expected that step is meant the round steel wire material with above-mentioned plate-like, through aligning cutting-off device, cuts into round steel and directly expects.
The processing method of described U bolt also comprises:
Step 4, the U bolt that shaping is finished to step 3.2 adopt trivalent chromium zinc-plated.
The processing method of described U bolt also comprises:
Step 5, check: the U bolt finished product is implemented check, specifically refer to center distance P, comprise the curved footpath A of circularity U bolt, height H, the precision of reach C is tested.
The present invention adopts thread rolling step, hydraulic bending to be shaped and the shaping step, no matter make the product presentation quality of making, or dimensional accuracy all reaches customer demand; And each produce continuously in the first-time qualification rate of product can both be greater than 98%.
Description of drawings
Accompanying drawing 1 is the structural representation of the U bolt made of the processing method of U bolt of the present invention;
Accompanying drawing 2 carries out the schematic diagram of thread rolling operation for the screw plate of the processing method of U bolt of the present invention;
Accompanying drawing 3 is the schematic diagram of prior art by the bolt of conventional drawing;
Accompanying drawing 4 is finished the structural representation of the U bolt of shaping step making for the processing method of U bolt of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples the specific embodiment of the present invention is further described:
The processing method of U bolt of the present invention (as shown in Figure 1) specifically comprises following steps:
Step 1, wire drawing: fingering material round steel material (carbon steel or stainless steel) earlier on wire drawing machine wire-drawing operation once, promptly rough program still puts the wire drawing die of sizing then on wire drawing machine
Draw once again, be met the plate-like round steel wire material of dimensional accuracy and photometric requirement, the diameter of this plate-like round steel wire material meets the requirement of the bolt outside diameter d shown in the accompanying drawing 1; And this material surface has certain brightness;
Step 2, material is opened in straightening: with the round steel wire material of above-mentioned plate-like, through aligning cutting-off device, cut into round steel and directly expect;
Step 3, blanking: described round steel is directly expected, press the development size of U bolt product all size, on the 16-25T punch press, cut into the short material 10 of plurality of sections (precision ± 0.25mm);
Step 4, thread rolling: the two ends of above-mentioned every short material be processed into required screw thread on thread rolling machine, are 5/16 ", 3/8 " and 1/2 as bolt specification made in Great Britain " screw thread; During detection, except that whether the profile of tooth of precision C ± 1mm that checks reach and screw thread was neat, whether can it be qualified also to end the thread tooth of drift check bolt by screw thread, promptly rectify really engagement with drift.
Fig. 2 is for the operation principle of screw plate and be pressed into the position, and described screw plate comprises fixedly screw plate 20 and movable screw plate 30, and described fixedly screw plate 20 and movable screw plate 30 all have toothed tool face 21.Inclined-plane slightly on the described fixedly screw plate 20 is used for the thread rolling operation of rolling of short material 10; The inclined-plane of described fixedly screw plate 20 is horizontal by certain importing angle α, the scope of this angle [alpha] be 1 °～2 ° 30 '; The projected length L on described inclined-plane is L=(2～4) π d
In, d
InBe the pitch diameter of thread.
Be pressed into position (being the lower end, inclined-plane) to what short material 10 was arranged on fixing screw plate 20, movable screw plate 30 is pressed and is put on short material 10, this activity screw plate 30 drives by the crank connecting rod apparatus (not shown), along the direction of arrow (as shown in Figure 2) rectilinear motion forward, roll forward to promote short material 10.Short material 10 enters calibration site (promptly fixedly the planar section of screw plate) by being pressed into the position, by the screw plate scroll-up/down, reach the purpose of machining screw, finally to withdrawing from position (annotate: second half of screw plate mechanism and Fig. 1 symmetry are not drawn), workpiece rolls three circles partly approximately, whole profile of tooth is just pushed complete, i.e. thread rolling is finished.
To stainless steel product, because toughness of material is big more than general steel, the sizing so in the process of roll extrusion profile of tooth, be easy to heating, for reducing the polishing of heating and assurance toothed surface, in the thread rolling process, add cooling fluid, this cooling fluid is the metalworking fluid that is referred to as of a kind of diesel oil and machine oil mixing, available from Guangzhou Reynolds chemistry Science and Technology Ltd..
Step 5, bending forming: the weak point that two ends thread rolling are finished is anticipated the position and is gone in the mould, is bent into the U bolt workpiece of specific standard by hydroforming.
For springback capacity very big material such as carbon steel, stainless steels etc. will bend to the U-shaped workpiece, it is very difficult adopting first order buckling to be shaped, especially under the very little situation of relative bending radius, be in three-dimensional stress state during material bending, the springback capacity that is obtained as going to derive by this stress state is quite complicated, so springback capacity is determined by engineer testing usually.In the practice, it is irrational adopting bending ram, because punching out not only speed is fast, and when the bending die internal shaping,, the part stress state class of unit length bears " concentrfated load " because being similar to simply supported beam, maximal bending moment just occurs in workpiece central authorities (being the punch press Center of Pressure) in the forming process, and load distribution in workpiece two ends is little, so the workpiece two ends are owing to the disappearance of elastic bending deflection is answered directly after unloading, its springback angle of U bolt workpiece of coming out of punching out is very big like this, and the workpiece central part also is with pointed and impression.
The 40T hydraulic press that the present invention adopts band to take blame for others is by hydroforming processing U bolt.Like this, workpiece is on hydraulic press and the effect of liftout tank arranged, its stress is similar to bears " distributed load ", moment of flexure value in the forming process is basic identical, pressure is close on the die wall material uniformly, and the distortion that makes the workpiece two ends also is in the higher stress state of value of compressive stress, thereby not only improved the shaping accuracy of workpiece; And avoided the relative slip between material and punch or the die and produce the material attenuation, defects such as the pointed and impression of central zone have guaranteed that the material of workpiece is thick evenly, smooth surface.
Step 6, shaping: step 5 operation bending forming is an once-forming, and the shaping of this step is a secondary forming, finally reaches the required precision of center distance P value.
The 25T punch press is then taked in the shaping of this step, and used shaping mould is a springback angle after being shaped according to first order buckling and well-designed.Learn from Fig. 3: the BENDING PROCESS, the B zone at workpiece two ends still is in elastic bending deflection; The disappearance of strain after demoulding unloading and cause that both sides are not parallel promptly produces springback angle β.So sizing die carries out shaping to the B zone exactly, by the operative employee mould is adjusted.Workpiece after the shaping as shown in Figure 4.
U bolt has a lot of middle specifications, and the product of some specification only needs once-forming; But to curved footpath (comprising circularity) A＞50mm (see figure 1), the large scale product of center distance P＞72～74mm (see figure 1) then needs further to reach qualified finished product by shaping.
Step 7, zinc-plated: be to satisfy environmental requirement ROHS requirement in the world, adopt trivalent chromium zinc-plated the bolt after the above-mentioned shaping, zinc coating thickness 6～10 μ m, the zinc layer quality inspection after zinc-plated removes the outward appearance color and luster, outside the determining film thickness, also regularly does salt spray test.
Step 8, check: adopt comprehensive appliance special for detecting that the finished product after zinc-plated is implemented complete detection.Interventions Requested except that outward appearance requires, to the center distance P of U bolt, curved footpath A (comprising circularity), height H, reach C, and, cooperating between the described nut that becomes assembly with bolts assemblies and the bolt, as shown in Figure 1.
The U bolt precision that method of the present invention is made is 5/16 " 3/8 " 1/2 of 2A level " inch screw thread, being different from general precision commonly used on the market is the metric thread M8 M10 M12 of 6g level; And the nut of supporting one-tenth assembly is single chamfering, and lifting surface area is also increased to some extent.
The present invention has rationally adopted thread rolling, hydraulic bending to be shaped and this three roads technological measure of shaping, no matter thereby the product presentation quality of making, or dimensional accuracy all reaches customer demand; And each produce continuously in the first-time qualification rate of product can both be greater than 98%.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. the processing method of a U bolt comprises:
Step 1, blanking directly expects to cut into the short material of plurality of sections (10) with round steel on punch press;
Step 2, thread rolling is processed into the short material with profile of tooth screw thread with the two ends thread rolling of lacking material (10) that step 1 obtains;
Step 3 is dashed curvedly, and the weak point that two ends are had a profile of tooth screw thread is anticipated the position and gone in the mould, is bent into the U bolt workpiece by drawing;
It is characterized in that, describedly dash curved step and further comprise:
Step 3.1, bending forming, the weak point that two ends are had a profile of tooth screw thread are anticipated the position and are gone in the mould, are bent into the U bolt workpiece;
Step 3.2, shaping by shaping mould, makes the U bolt workpiece of step 3.1 bending forming be shaped once more, reaches the specification requirement of bolt workpiece.
2. the processing method of U bolt as claimed in claim 1 is characterized in that, the bending forming operation of described step 3.1 adopts hydraulic press to finish by the hydroforming method.
3. the processing method of U bolt as claimed in claim 1 is characterized in that, described shaping mould is according to the design of the springback angle of step 3.1 gained U bolt workpiece.
4. the processing method of U bolt as claimed in claim 1 is characterized in that, in the thread rolling step of described step 2, adopts screw plate that short material (10) is carried out thread rolling processing;
Described screw plate comprises fixedly screw plate (20) and movable screw plate (30), and described fixedly screw plate (20) and movable screw plate (30) all have toothed tool face (21).
5. the processing method of U bolt as claimed in claim 4 is characterized in that, also is provided with the inclined-plane on the described fixedly screw plate (20), and this inclined-plane is the roll importing position of thread rolling processing of short material (10).
6. the processing method of U bolt as claimed in claim 5 is characterized in that, have between the inclined-plane of described fixedly screw plate (20) and the horizontal plane to import angle α, the scope of this angle [alpha] be 1 °～2 ° 30 '; The projected length L on described inclined-plane is L=(2～4) π d
In(d
InBe the pitch diameter of thread).
7. the processing method of U bolt as claimed in claim 4 is characterized in that, described thread rolling step also further comprises: in the thread rolling process, add metalworking fluid.
8. the processing method of U bolt as claimed in claim 1 is characterized in that, also comprise before described step 1 blanking: the material step is opened in wire drawing and straightening;
Described drawing step is meant that charging round steel material adopts wire drawing machine, obtains plate-like round steel wire material through the wire drawing program, and the diameter of this plate-like round steel wire material meets the requirement of bolt outside diameter d;
Described straightening is opened and is expected that step is meant the round steel wire material with above-mentioned plate-like, through aligning cutting-off device, cuts into round steel and directly expects.
9. the processing method of U bolt as claimed in claim 1 is characterized in that, the processing method of described U bolt also comprises:
Step 4, the U bolt that shaping is finished to step 3.2 adopt trivalent chromium zinc-plated.
10. as the processing method of claim 1 or the described U bolt of claim 9, it is characterized in that the processing method of described U bolt also comprises:
Step 5, check: the U bolt finished product is implemented check, specifically refer to center distance P, comprise the curved footpath A of circularity U bolt, height H, the precision of reach C is tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010106566 CN102145443B (en) | 2010-02-05 | 2010-02-05 | Method for processing U-shaped bolts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010106566 CN102145443B (en) | 2010-02-05 | 2010-02-05 | Method for processing U-shaped bolts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102145443A true CN102145443A (en) | 2011-08-10 |
| CN102145443B CN102145443B (en) | 2013-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010106566 Expired - Fee Related CN102145443B (en) | 2010-02-05 | 2010-02-05 | Method for processing U-shaped bolts |
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|---|---|
| CN (1) | CN102145443B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513459A (en) * | 2011-12-20 | 2012-06-27 | 渤海造船厂集团有限公司 | Dimension correcting die for openings of large-aperture U-shaped tubes |
| CN102716972A (en) * | 2012-07-11 | 2012-10-10 | 中国重汽集团济南动力有限公司 | Cold stamping process method for oil tank bracket of heavy vehicle |
| CN103522073A (en) * | 2013-11-04 | 2014-01-22 | 宁波浩渤工贸有限公司 | U-shaped double-head bolt processing equipment |
| CN103758839A (en) * | 2014-01-21 | 2014-04-30 | 中国重汽集团济南动力有限公司 | Processing technology for light clamping U-shaped bolts |
| CN104275371A (en) * | 2013-03-15 | 2015-01-14 | 广东富华工程机械制造有限公司 | U-type bolt bending device |
| CN104295586A (en) * | 2014-08-25 | 2015-01-21 | 蒋福泽 | U-shaped bolt and manufacturing method thereof |
| CN105598704A (en) * | 2016-03-11 | 2016-05-25 | 宁波思进机械股份有限公司 | U-bolt production apparatus |
| CN109647950A (en) * | 2019-01-31 | 2019-04-19 | 海盐宏达五金制造有限公司 | Apparatus for bending for U-bolt |
| CN109746644A (en) * | 2019-02-19 | 2019-05-14 | 海盐孙氏建新标准件制造有限公司 | A kind of production technology of bent angle bolt |
| CN110227908A (en) * | 2019-06-14 | 2019-09-13 | 济南实达紧固件有限公司 | A kind of J-type bolt production technology |
| CN111152122A (en) * | 2020-01-19 | 2020-05-15 | 宾科汽车紧固件（昆山）有限公司 | Rubbing method and device for bar stock |
| CN112008339A (en) * | 2020-08-24 | 2020-12-01 | 山东汽车弹簧厂淄博有限公司 | Machining process for microalloying machining and strengthening U-shaped bolt |
| CN112621129A (en) * | 2020-12-16 | 2021-04-09 | 上海耐上炯新材料科技有限公司 | Preparation method and manufacturing equipment of U-shaped push rod for glue extruding gun |
| CN113334034A (en) * | 2021-07-07 | 2021-09-03 | 南京科技职业学院 | Manufacturing method of eccentric suspension post |
| CN115815640A (en) * | 2023-02-20 | 2023-03-21 | 邯郸市永年区卫争紧固件制造有限公司 | Bolt processing apparatus for producing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4936131A (en) * | 1980-07-30 | 1990-06-26 | Gray John C | Production of threaded metal rods for making U-bolts |
| JP3901299B2 (en) * | 1997-10-02 | 2007-04-04 | 双和化成株式会社 | U bolt manufacturing method |
| US6418772B1 (en) * | 2000-09-11 | 2002-07-16 | Consolidated Metal Products, Inc. | Centering device and method for U-bolt bending machine |
| CN201371169Y (en) * | 2009-04-14 | 2009-12-30 | 攀枝花新钢钒股份有限公司 | Forming clamp for U-shaped bolt |
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2010
- 2010-02-05 CN CN 201010106566 patent/CN102145443B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513459A (en) * | 2011-12-20 | 2012-06-27 | 渤海造船厂集团有限公司 | Dimension correcting die for openings of large-aperture U-shaped tubes |
| CN102513459B (en) * | 2011-12-20 | 2014-02-12 | 渤海造船厂集团有限公司 | Dimension correcting die for openings of large-aperture U-shaped tubes |
| CN102716972A (en) * | 2012-07-11 | 2012-10-10 | 中国重汽集团济南动力有限公司 | Cold stamping process method for oil tank bracket of heavy vehicle |
| CN102716972B (en) * | 2012-07-11 | 2014-11-19 | 中国重汽集团济南动力有限公司 | Cold stamping process method for oil tank bracket of heavy vehicle |
| CN104275371A (en) * | 2013-03-15 | 2015-01-14 | 广东富华工程机械制造有限公司 | U-type bolt bending device |
| CN103522073A (en) * | 2013-11-04 | 2014-01-22 | 宁波浩渤工贸有限公司 | U-shaped double-head bolt processing equipment |
| CN103522073B (en) * | 2013-11-04 | 2015-09-02 | 宁波浩渤工贸有限公司 | The process equipment of U-shaped stud |
| CN103758839A (en) * | 2014-01-21 | 2014-04-30 | 中国重汽集团济南动力有限公司 | Processing technology for light clamping U-shaped bolts |
| CN104295586A (en) * | 2014-08-25 | 2015-01-21 | 蒋福泽 | U-shaped bolt and manufacturing method thereof |
| CN105598704B (en) * | 2016-03-11 | 2017-11-07 | 宁波思进机械股份有限公司 | A kind of processing production equipment of U-bolt |
| CN105598704A (en) * | 2016-03-11 | 2016-05-25 | 宁波思进机械股份有限公司 | U-bolt production apparatus |
| CN109647950A (en) * | 2019-01-31 | 2019-04-19 | 海盐宏达五金制造有限公司 | Apparatus for bending for U-bolt |
| CN109647950B (en) * | 2019-01-31 | 2020-08-07 | 海盐宏达五金制造有限公司 | Bending device for U-shaped bolt |
| CN109746644A (en) * | 2019-02-19 | 2019-05-14 | 海盐孙氏建新标准件制造有限公司 | A kind of production technology of bent angle bolt |
| CN110227908A (en) * | 2019-06-14 | 2019-09-13 | 济南实达紧固件有限公司 | A kind of J-type bolt production technology |
| CN111152122A (en) * | 2020-01-19 | 2020-05-15 | 宾科汽车紧固件（昆山）有限公司 | Rubbing method and device for bar stock |
| CN112008339A (en) * | 2020-08-24 | 2020-12-01 | 山东汽车弹簧厂淄博有限公司 | Machining process for microalloying machining and strengthening U-shaped bolt |
| CN112621129A (en) * | 2020-12-16 | 2021-04-09 | 上海耐上炯新材料科技有限公司 | Preparation method and manufacturing equipment of U-shaped push rod for glue extruding gun |
| CN113334034A (en) * | 2021-07-07 | 2021-09-03 | 南京科技职业学院 | Manufacturing method of eccentric suspension post |
| CN115815640A (en) * | 2023-02-20 | 2023-03-21 | 邯郸市永年区卫争紧固件制造有限公司 | Bolt processing apparatus for producing |
| CN115815640B (en) * | 2023-02-20 | 2023-05-16 | 邯郸市永年区卫争紧固件制造有限公司 | Bolt processing apparatus for producing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102145443B (en) | 2013-02-27 |
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