CN104295586A - U-shaped bolt and manufacturing method thereof - Google Patents
U-shaped bolt and manufacturing method thereof Download PDFInfo
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- CN104295586A CN104295586A CN201410421193.8A CN201410421193A CN104295586A CN 104295586 A CN104295586 A CN 104295586A CN 201410421193 A CN201410421193 A CN 201410421193A CN 104295586 A CN104295586 A CN 104295586A
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- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007704 transition Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 238000003754 machining Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses a U-shaped bolt and a manufacturing method thereof. The U-shaped bolt comprises vertical column sections on the two sides and a curve section, wherein the vertical column sections are parallel to each other and are divided into connection sections and threaded sections, the threaded sections are connected with the curve section through the connection sections, and outer threads are distributed on the outer walls of the threaded sections. Working faces of the connection sections are planes, the working face of the curve section is a bent plane, and the working face of the curve section is in smooth transition with the working faces of the connection sections. When the U-shaped bolt is used, the working faces of the U-shaped bolt are in face contact with a fastened object completely, the contact area reaches one hundred percent, and therefore, the good fastening effect is achieved. The manufacturing method of the U-shaped bolt comprises the steps that cold compression forming is only needed to be conducted on whole long-strip-shaped solid round steel, one or a pair of planes are pressed in the length direction, thread rolling is conducted on the corresponding portions of the threaded sections, the outer threads are formed in the arc portions on the outer walls of the corresponding portions of the threaded sections, and the corresponding portion of the curve section is folded into a curve shape finally. The machining technology is quite simple. In order to enable the threaded sections to work more reliably, the threaded sections are formed into cylindrical shapes through cold compression again.
Description
Technical field
The present invention relates to fastening connection piece technical field, specifically a kind of U bolt and preparation method thereof.
Background technique
U bolt is generally used for Motor Vehicle fastening connection piece, and it adopts round steel material usually, and be provided with externally threaded screw section at the two end part of bolt, screw section coordinates with specialized nut, thus realizes being fastenedly connected of different parts.The screw section of traditional U bolt and the cross section in non-threaded portion are circle, and the way of contact of this kind of U bolt and link is linear contact lay, and area of contact is little, and normal appearance connects unstable situation.
Chinese invention patent application 201310083313.3 discloses a kind of U bolt and pre-shaping, curving apparatus and hardening and tempering method, as shown in Figure 1 and Figure 2, U bolt comprises both sides right cylinder section 31 parallel to each other, connects the curved segment of two right cylinder sections, described right cylinder section 31 is provided with screw section 33, the outer wall of screw section 33 is provided with outside thread, and described curved segment comprises the plat part 32 being positioned at middle part, the transition arcs portion connecting plat part 32 and both sides right cylinder section 31.It is by flattening process to curved segment local, and the curved segment local of U bolt changes into plane-plane contact with the contact of connected element from linear contact lay, and the area of contact of its partial circle segmental arc and fastened thing reaches more than 95%.Add U bolt and the area of contact being connected thing, effectively prevent from connecting unstable situation.
Due to U bolt use time, be fastenedly connected by the outside thread of screw section and the incompatible realization of nut lock, whether the part near screw section on such U bolt can have great impact with fastened thing Contact fastening effect.Above-mentioned its screw section of this U bolt only accounts for a part for right cylinder section, and the non-threaded portion of right cylinder section is cylindric, is still linear contact lay with the contact of fastened thing, and the fastening effect of U bolt is made a discount greatly; And curved segment is transition arcs portion near the part of right cylinder section, the working surface in this transition arcs portion has certain radian, and cannot reach face completely between fastened thing and contacts, and fastening effect also can be caused to decline.
In view of this, claimant furthers investigate U bolt and preparation method thereof, overcomes the problem that existing U bolt fastening effect is undesirable, then has this case to produce.
Summary of the invention
The object of this invention is to provide a kind of U bolt with good fastening effect.
Another object of the present invention is to provide a kind of method preparing above-mentioned U bolt.
To achieve these goals, the present invention adopts following technological scheme:
A kind of U bolt, comprise both sides right cylinder section parallel to each other and the curved segment being connected two right cylinder sections, described right cylinder section is divided into linkage section and thread section, and described thread section is connected with described curved segment by described linkage section, and the outer wall of described thread section is laid with outside thread; The working surface of described linkage section is plane, and the working surface of described curved segment is the plane of bending, and both working surfaces seamlessly transit.
All arcuately, this is arc has the arc-shaped side of a straight flange and straight flange tandem array therewith, and this straight flange corresponds to above-mentioned working surface in the cross section of described linkage section and described curved segment.
The cross section of described linkage section and described curved segment is all in cydariform, and this cydariform is formed by a pair straight flange and a pair arc-shaped side tandem array, and this pair straight flange corresponds to above-mentioned working surface and the back side thereof.
Described thread section is cylindric, and described outside thread is laid on its columned outer wall.
Arcuately, this is arc has the arc-shaped side of a straight flange and straight flange tandem array therewith in the cross section of described thread section, described outside thread be laid in described thread section corresponds to this arc-shaped side outer wall on.
The cross section of described thread section is all in cydariform, and this cydariform is formed by a pair straight flange and a pair arc-shaped side tandem array, and described outside thread is laid on described thread section corresponding on the outer wall of this pair arc-shaped side.
A preparation method for U bolt, realizes as follows:
One, adopt cold-press process to carry out cold moudling to the solid round steel of strip, extrude at least one plane along its length, obtain the solid steel billet of strip;
Two, according to U bolt Len req, the solid steel billet of strip through step one cold moudling is cut, obtain the base substrate of U bolt, the base substrate of this U bolt has the right cylinder section corresponding part at two ends and middle curved segment corresponding part according to the structure of U bolt, right cylinder section corresponding part has thread section corresponding part and linkage section corresponding part, and linkage section corresponding part is between corresponding thread section corresponding part and curved segment corresponding part;
Three, roll tooth to above-mentioned thread section corresponding part, the curved portion on above-mentioned thread section corresponding part outer wall forms outside thread;
Four, using the appropriate section of step one gained plane as the inner side surface of described linkage section corresponding part and described curved segment corresponding part, above-mentioned curved segment corresponding part is converted into bending according to the designing requirement of U bolt, namely obtain U bolt, namely the inner side surface of described linkage section corresponding part and described curved segment corresponding part corresponds to the working surface of described linkage section and described curved segment.
In above-mentioned steps one, length direction along the solid round steel of strip extrudes a plane, obtain the solid steel billet of cross section strip arcuately, this is arc has the arc-shaped side of a straight flange and straight flange tandem array therewith, and this straight flange corresponds to the working surface of above-mentioned linkage section and above-mentioned curved segment; Described outside thread is laid on described thread section corresponding part corresponding on the outer wall of this arc-shaped side.
In above-mentioned steps one, length direction along the solid round steel of strip extrudes pair of planar, obtain the solid steel billet of strip that cross section is cydariform, this cydariform is formed by a pair straight flange and a pair arc-shaped side tandem array, this a pair straight flange, wherein while correspond to the working surface of above-mentioned linkage section and above-mentioned curved segment, another side corresponds to the back side of the working surface of above-mentioned linkage section and above-mentioned curved segment; Described outside thread is laid on described thread section corresponding part corresponding on the outer wall of this pair arc-shaped side.
Between above-mentioned steps two and above-mentioned steps three, also there is second time cold moudling operation, namely adopt cold-press process double thread section corresponding part to carry out cold moudling, make thread section corresponding part be cylindric.
After adopting technique scheme, U bolt of the present invention, the working surface of its linkage section is plane, and the working surface of curved segment is the plane of bending, and both working surfaces seamlessly transit.In use, be that face contacts completely between its working surface with fastened thing, area of contact reaches 100% to such U bolt, has good fastening effect.
In the present invention, the cross section of linkage section and curved segment all can arcuately or cydariform, that is, inner side be plane or inside and outside both sides all in plane, in order to simplified processing process, thread section can be pressed into cross section arcuately or cydariform with linkage section together with curved segment.Also thread section can be reprocessed into cylindrical, make thread section work more reliable.
The preparation method of U bolt of the present invention, only need carry out cold moudling to the solid round steel of whole piece strip, one or pair of planar is extruded in length direction, double thread section corresponding part carries out rolling tooth again, curved portion on thread section corresponding part outer wall forms outside thread, finally again curved segment corresponding part is converted into bending, processing technology is extremely simple.In order to make thread section work more reliable, can by thread section again cold moudling be cylindric.
Accompanying drawing explanation
Fig. 1 is the structural representation of U bolt in prior art;
Fig. 2 is the stereogram of Fig. 1;
Fig. 3 is the structural representation of U bolt embodiment one of the present invention;
Fig. 3-1 is the schematic cross-section of right cylinder section and curved segment in Fig. 3;
Fig. 4 is the structural representation of U bolt embodiment two of the present invention;
Fig. 4-1 is the schematic cross-section of Fig. 4 middle connecting segment and curved segment;
Fig. 5 is the structural representation of U bolt embodiment three of the present invention;
Fig. 5-1 is the schematic cross-section of right cylinder section and curved segment in Fig. 5;
Fig. 6 is the structural representation of U bolt embodiment four of the present invention;
Fig. 6-1 is the schematic cross-section of Fig. 6 middle connecting segment and curved segment.
Embodiment
Embodiment one:
U bolt of the present invention, embodiment one as shown in Figure 3, comprise both sides right cylinder section 1 parallel to each other and the curved segment 2 being connected two right cylinder sections, described right cylinder section 1 is divided into linkage section 11 and thread section 12, described thread section 12 is connected with described curved segment 2 by described linkage section 11, and the outer wall of described thread section 12 is laid with outside thread.
Right cylinder section 1 and curved segment 2 are structure as a whole, the cross section of right cylinder section 1 and the cross section of curved segment 2 are identical arc, as shown in figure 3-1, this is arc has the arc-shaped side 4 of a straight flange 3 and straight flange tandem array therewith, straight flange 3 correspondence be the inner side surface of right cylinder section 1 and curved segment 2, this inner side surface is also the working surface of linkage section 11 and curved segment 2, and the working surface of linkage section 11 is plane, the working surface of curved segment 2 is the plane of bending, and the working surface of the working surface of linkage section 11 and curved segment 2 seamlessly transits one-body molded.The outside thread of thread section 12 is laid on thread section 12 corresponding on the outer wall of this arc-shaped side 4.
The preparation method of the present embodiment U bolt, realizes as follows:
One, cold-press process is adopted to carry out cold moudling to the solid round steel of strip, extrude a plane along its length, obtain the solid steel billet of cross section strip arcuately, this is arc has the arc-shaped side of a straight flange and straight flange tandem array therewith, and this straight flange corresponds to the linkage section of U bolt and the working surface of curved segment;
Two, according to U bolt Len req, the solid steel billet of strip through step one cold moudling is cut, obtain the base substrate of U bolt, the base substrate of this U bolt has the right cylinder section corresponding part at two ends and middle curved segment corresponding part according to the structure of U bolt, right cylinder section corresponding part has thread section corresponding part and linkage section corresponding part, and linkage section corresponding part is between corresponding thread section corresponding part and curved segment corresponding part;
Three, roll tooth to above-mentioned thread section corresponding part, the part corresponding to above-mentioned arc-shaped side on the outer wall of above-mentioned thread section corresponding part forms outside thread;
Four, using the appropriate section of the plane of step one gained as the inner side surface of described linkage section corresponding part and described curved segment corresponding part, above-mentioned curved segment corresponding part is converted into bending according to the designing requirement of U bolt, namely obtain U bolt, namely the inner side surface of described linkage section corresponding part and described curved segment corresponding part corresponds to the working surface of described linkage section and described curved segment.
Embodiment two:
As shown in Fig. 4 and Fig. 4-1, the difference of the present embodiment and embodiment one is only: thread section 12 is in cylindric, and thread section 12 outside thread is laid on its columned outer wall.
The preparation method of the present embodiment and the difference of embodiment one are only: between step 2 and step 3, also have second time cold moudling operation, namely adopt cold-press process double thread section corresponding part to carry out cold moudling, make thread section corresponding part be cylindric.And step 3 changes into: roll tooth to this columned thread section corresponding part, on the outer wall of columned thread section corresponding part, form outside thread.
Embodiment three:
U bolt of the present invention, embodiment three as shown in Figure 5, comprise both sides right cylinder section 1 parallel to each other and the curved segment 2 being connected two right cylinder sections, described right cylinder section 1 is divided into linkage section 11 and thread section 12, described thread section 12 is connected with described curved segment 2 by described linkage section 11, and the outer wall of described thread section 12 is laid with outside thread.
Right cylinder section 1 and curved segment 2 are structure as a whole, the cross section of right cylinder section 1 and the cross section of curved segment 2 are identical cydariform, as shown in fig. 5-1, this cydariform is formed by a pair straight flange 5 and a pair arc-shaped side 6 tandem array, a pair straight flange 5 correspondence be the inner side surface of right cylinder section 1 and curved segment 2, and the outer side surface of right cylinder section 1 and curved segment 2, this inner side surface is also the working surface of linkage section 11 and curved segment 2, the working surface of linkage section 11 is plane, the working surface of curved segment 2 is the plane of bending, and the working surface of the working surface of linkage section 11 and curved segment 2 seamlessly transits one-body molded.The outside thread of thread section 12 is laid on thread section 12 corresponding on the outer wall of this pair arc-shaped side 6.
The preparation method of the present embodiment U bolt, realizes as follows:
One, cold-press process is adopted to carry out cold moudling to the solid round steel of strip, extrude pair of planar along its length, obtain the solid steel billet of strip that cross section is cydariform, this cydariform is formed by a pair straight flange and a pair arc-shaped side tandem array, this a pair straight flange, wherein while correspond to the linkage section of U bolt and the working surface of curved segment, another side corresponds to the back side of the linkage section of U bolt and the working surface of curved segment;
Two, according to U bolt Len req, the solid steel billet of strip through step one cold moudling is cut, obtain the base substrate of U bolt, the base substrate of this U bolt has the right cylinder section corresponding part at two ends and middle curved segment corresponding part according to the structure of U bolt, right cylinder section corresponding part has thread section corresponding part and linkage section corresponding part, and linkage section corresponding part is between corresponding thread section corresponding part and curved segment corresponding part;
Three, roll tooth to above-mentioned thread section corresponding part, the part corresponding to above-mentioned a pair arc-shaped side on the outer wall of above-mentioned thread section corresponding part forms outside thread;
Four, using the appropriate section of one of them plane of step one gained as the inner side surface of described linkage section corresponding part and described curved segment corresponding part, above-mentioned curved segment corresponding part is converted into bending according to the designing requirement of U bolt, namely obtain U bolt, namely the inner side surface of described linkage section corresponding part and described curved segment corresponding part corresponds to the working surface of described linkage section and described curved segment.
Embodiment four:
As shown in Fig. 6 and Fig. 6-1, the difference of the present embodiment and embodiment three is only: thread section 12 is in cylindric, and thread section 12 outside thread is laid on its columned outer wall.
The preparation method of the present embodiment and the difference of embodiment three are only: between step 2 and step 3, also have second time cold moudling operation, namely adopt cold-press process double thread section corresponding part to carry out cold moudling, make thread section corresponding part be cylindric.And step 3 changes into: roll tooth to this columned thread section corresponding part, on the outer wall of columned thread section corresponding part, form outside thread.
Claims (10)
1. a U bolt, comprise both sides right cylinder section parallel to each other and the curved segment being connected two right cylinder sections, described right cylinder section is divided into linkage section and thread section, and described thread section is connected with described curved segment by described linkage section, and the outer wall of described thread section is laid with outside thread; It is characterized in that: the working surface of described linkage section is plane, the working surface of described curved segment is the plane of bending, and both working surfaces seamlessly transit.
2. a kind of U bolt according to claim 1, is characterized in that: all arcuately, this is arc has the arc-shaped side of a straight flange and straight flange tandem array therewith, and this straight flange corresponds to above-mentioned working surface in the cross section of described linkage section and described curved segment.
3. a kind of U bolt according to claim 1, is characterized in that: the cross section of described linkage section and described curved segment is all in cydariform, and this cydariform is formed by a pair straight flange and a pair arc-shaped side tandem array, and this pair straight flange corresponds to above-mentioned working surface and the back side thereof.
4. a kind of U bolt according to any one of claim 1-3, is characterized in that: described thread section is cylindric, and described outside thread is laid on its columned outer wall.
5. a kind of U bolt according to any one of claim 1-3, it is characterized in that: the cross section of described thread section arcuately, this is arc has the arc-shaped side of a straight flange and straight flange tandem array therewith, described outside thread be laid in described thread section corresponds to this arc-shaped side outer wall on.
6. a kind of U bolt according to any one of claim 1-3, it is characterized in that: the cross section of described thread section is all in cydariform, this cydariform is formed by a pair straight flange and a pair arc-shaped side tandem array, and described outside thread is laid on described thread section corresponding on the outer wall of this pair arc-shaped side.
7. a preparation method for U bolt, is characterized in that: realize as follows:
One, adopt cold-press process to carry out cold moudling to the solid round steel of strip, extrude at least one plane along its length, obtain the solid steel billet of strip;
Two, according to U bolt Len req, the solid steel billet of strip through step one cold moudling is cut, obtain the base substrate of U bolt, the base substrate of this U bolt has the right cylinder section corresponding part at two ends and middle curved segment corresponding part according to the structure of U bolt, right cylinder section corresponding part has thread section corresponding part and linkage section corresponding part, and linkage section corresponding part is between corresponding thread section corresponding part and curved segment corresponding part;
Three, roll tooth to above-mentioned thread section corresponding part, the curved portion on above-mentioned thread section corresponding part outer wall forms outside thread;
Four, using the appropriate section of step one gained plane as the inner side surface of described linkage section corresponding part and described curved segment corresponding part, above-mentioned curved segment corresponding part is converted into bending according to the designing requirement of U bolt, namely obtain U bolt, namely the inner side surface of described linkage section corresponding part and described curved segment corresponding part corresponds to the working surface of described linkage section and described curved segment.
8. the preparation method of a kind of U bolt according to claim 7, it is characterized in that: in above-mentioned steps one, length direction along the solid round steel of strip extrudes a plane, obtain the solid steel billet of cross section strip arcuately, this is arc has the arc-shaped side of a straight flange and straight flange tandem array therewith, and this straight flange corresponds to the working surface of above-mentioned linkage section and above-mentioned curved segment; Described outside thread is laid on described thread section corresponding part corresponding on the outer wall of this arc-shaped side.
9. the preparation method of a kind of U bolt according to claim 7, it is characterized in that: in above-mentioned steps one, length direction along the solid round steel of strip extrudes pair of planar, obtain the solid steel billet of strip that cross section is cydariform, this cydariform is formed by a pair straight flange and a pair arc-shaped side tandem array, this a pair straight flange, wherein corresponds to the working surface of above-mentioned linkage section and above-mentioned curved segment, and another side corresponds to the back side of the working surface of above-mentioned linkage section and above-mentioned curved segment; Described outside thread is laid on described thread section corresponding part corresponding on the outer wall of this pair arc-shaped side.
10. the preparation method of a kind of U bolt according to claim 7, it is characterized in that: between above-mentioned steps two and above-mentioned steps three, also there is second time cold moudling operation, namely adopt cold-press process double thread section corresponding part to carry out cold moudling, make thread section corresponding part be cylindric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421193.8A CN104295586B (en) | 2014-08-25 | 2014-08-25 | U-shaped bolt and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421193.8A CN104295586B (en) | 2014-08-25 | 2014-08-25 | U-shaped bolt and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104295586A true CN104295586A (en) | 2015-01-21 |
| CN104295586B CN104295586B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410421193.8A Active CN104295586B (en) | 2014-08-25 | 2014-08-25 | U-shaped bolt and manufacturing method thereof |
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| Country | Link |
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| CN (1) | CN104295586B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286542A (en) * | 2015-05-12 | 2017-01-04 | 无锡山宁机械有限公司 | A kind of ∩ type compensates bolt |
| 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 |
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| CN102145443A (en) * | 2010-02-05 | 2011-08-10 | 上海新申金属制品有限公司 | Method for processing U-shaped bolts |
| KR20120000304A (en) * | 2010-06-25 | 2012-01-02 | 안시영 | The coated u bolt for concrete pole support |
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| CN103206444A (en) * | 2013-03-15 | 2013-07-17 | 广东富华工程机械制造有限公司 | U-shaped bolt and preforming device, bending device and quenching and tempering method thereof |
| CN103537878A (en) * | 2013-11-04 | 2014-01-29 | 宁波浩渤工贸有限公司 | Processing method for U-shaped double end bolt |
| CN203431275U (en) * | 2013-07-09 | 2014-02-12 | 芜湖市金贸流体科技股份有限公司 | Servo valve |
| CN204127075U (en) * | 2014-08-25 | 2015-01-28 | 蒋福泽 | A kind of U bolt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202082242U (en) * | 2011-04-26 | 2011-12-21 | 泉州凤顺汽车零部件有限公司 | Novel U-shaped bolt of vehicle steel board spring |
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| JPS4921369A (en) * | 1972-06-17 | 1974-02-25 | ||
| US20030111143A1 (en) * | 2001-10-23 | 2003-06-19 | Consolidated Metal Products, Inc. | Flattened U-bolt and method |
| US7698922B1 (en) * | 2003-03-01 | 2010-04-20 | Danko Donald M | Permanent invisible magnetic tags with digital data |
| CN102145443A (en) * | 2010-02-05 | 2011-08-10 | 上海新申金属制品有限公司 | Method for processing U-shaped bolts |
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| KR20120000304A (en) * | 2010-06-25 | 2012-01-02 | 안시영 | The coated u bolt for concrete pole support |
| CN202228509U (en) * | 2011-10-07 | 2012-05-23 | 吉安锐迈管道配件有限公司 | U-shaped bolt |
| CN103206444A (en) * | 2013-03-15 | 2013-07-17 | 广东富华工程机械制造有限公司 | U-shaped bolt and preforming device, bending device and quenching and tempering method thereof |
| CN203431275U (en) * | 2013-07-09 | 2014-02-12 | 芜湖市金贸流体科技股份有限公司 | Servo valve |
| CN103537878A (en) * | 2013-11-04 | 2014-01-29 | 宁波浩渤工贸有限公司 | Processing method for U-shaped double end bolt |
| CN204127075U (en) * | 2014-08-25 | 2015-01-28 | 蒋福泽 | A kind of U bolt |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286542A (en) * | 2015-05-12 | 2017-01-04 | 无锡山宁机械有限公司 | A kind of ∩ type compensates bolt |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104295586B (en) | 2017-02-15 |
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