CN104295586B - U-shaped bolt and manufacturing method thereof - Google Patents
U-shaped bolt and manufacturing method thereof Download PDFInfo
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- CN104295586B CN104295586B CN201410421193.8A CN201410421193A CN104295586B CN 104295586 B CN104295586 B CN 104295586B CN 201410421193 A CN201410421193 A CN 201410421193A CN 104295586 B CN104295586 B CN 104295586B
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- 238000004519 manufacturing process Methods 0.000 title abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 9
- 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
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 238000003754 machining Methods 0.000 abstract 1
- 238000005096 rolling process Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 2
- 206010016322 Feeling abnormal Diseases 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
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- 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 technology
U-bolt is generally used for motor vehicles fastening connection piece, and it generally adopts round steel material, in the setting of the both ends of bolt
With externally threaded threaded portion, threaded portion is coordinated with specialized nut, thus realizing being fastenedly connected of different parts.Traditional is U-shaped
The threaded portion of bolt is circle with the section in non-threaded portion, and the way of contact of this kind of U-bolt and connector is linear contact lay, connects
Contacting surface amasss little, the unstable situation of often appearance connection.
Chinese invention patent application 201310083313.3 discloses a kind of U-bolt and its preforming, curving apparatus and tune
Matter processing method, as shown in Figure 1 and Figure 2, U-bolt includes both sides right cylinder section 31 parallel to each other, connects the curved of two right cylinder sections
Section, described right cylinder section 31 is provided with threaded portion 33, and the outer wall of threaded portion 33 is provided with external screw thread, and described curved segment is included positioned at middle part
Plat part 32, connect plat part 32 and the transition arc portion of both sides right cylinder section 31.It is by processing to the flattening of curved segment local, U-shaped
The contact with connection member for the curved segment local of bolt changes into plane-plane contact from linear contact lay, its local arc section with by fastener
Contact area reaches more than 95%.Increased the contact area of U-bolt and connected thing, effectively prevent from connecting unstable feelings
Condition.
When being used due to U-bolt, by the external screw thread of threaded portion and nut sealed realizing being fastenedly connected, so U-shaped
On bolt, whether the part near threaded portion can have great impact with by fastener Contact fastening effect.Above-mentioned
Its threaded portion of this U-bolt only accounts for a part for right cylinder section, and the non-threaded portion of right cylinder section is cylindrical, with connecing by fastener
Touching is still linear contact lay so that the fastening effect of U-bolt is made a discount significantly；And the part near right cylinder section is transition in curved segment
Arc portion, the work surface of this transition arc portion has certain radian, contacts with being unable to reach completely face between fastener, also can
Fastening effect is led to decline.
In view of this, applicant furthers investigate to U-bolt and preparation method thereof, overcomes existing U-bolt tight
Gu the undesirable problem of effect, this case is then had to produce.
Content of the invention
It is an object of the invention to provide a kind of U-bolt with good fastening effect.
It is a further object of the present invention to provide a kind of method preparing above-mentioned U-bolt.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of U-bolt, including the curved segment of both sides right cylinder section parallel to each other and connection two right cylinder sections, described right cylinder section is divided
For linkage section and thread segment, described thread segment is connected with described curved segment by described linkage section, on the outer wall of described thread segment
It is laid with external screw thread；The work surface of described linkage section is plane, and the work surface of described curved segment is the plane of bending, and both works
Seamlessly transit as face.
The section of described linkage section and described curved segment is all arched, and this arch is had a straight flange and held in the mouth with this straight flange head and the tail
The arc-shaped side connecing, this straight flange corresponds to above-mentioned work surface.
All in cydariform, this cydariform is held in the mouth by a pair of straight flange and a pair of arc-shaped side head and the tail in the section of described linkage section and described curved segment
Connect and form, this pair of straight flange corresponds to above-mentioned work surface and its back side.
Described thread segment is cylindric, and described external screw thread is laid on its columned outer wall.
The section of described thread segment is arched, and this arch has a straight flange and the arc-shaped side with this straight flange tandem array,
Described external screw thread is laid on the outer wall corresponding to this arc-shaped side on described thread segment.
All in cydariform, this cydariform is formed by a pair of straight flange and a pair of arc-shaped side tandem array, institute in the section of described thread segment
State external screw thread to be laid on the outer wall that this pair of arc-shaped side is corresponded on described thread segment.
A kind of preparation method of U-bolt, is achieved by the steps of：
First, using cold-press process, to strip, solid round steel carries out cold moudling, extrudes at least one along its length
Plane, obtains the solid steel billet of strip；
2nd, according to U-bolt Len req, to the strip through step one cold moudling, solid steel billet cuts, and obtains
The base substrate of U-bolt, the base substrate of this U-bolt has right cylinder section corresponding part and the centre at two ends according to the structure of U-bolt
Curved segment corresponding part, right cylinder section corresponding part has thread segment corresponding part and linkage section corresponding part, linkage section correspondence portion
Divide and be located between corresponding thread segment corresponding part and curved segment corresponding part；
3rd, above-mentioned thread segment corresponding part is carried out roll tooth, the arch section on above-mentioned thread segment corresponding part outer wall
Form external screw thread；
4th, using the appropriate section of a plane of step one gained as described linkage section corresponding part and described curved segment pair
Answer the medial surface of part, above-mentioned curved segment corresponding part be converted into bending according to the design requirement of U-bolt, that is, obtain U-bolt,
The medial surface of described linkage section corresponding part and described curved segment corresponding part corresponds to the work of described linkage section and described curved segment
Make face.
In above-mentioned steps one, the length direction along the solid round steel of strip extrudes a plane, obtains section arched
The solid steel billet of strip, this arch has a straight flange and the arc-shaped side with this straight flange tandem array, and this straight flange corresponds to above-mentioned
Linkage section and the work surface of above-mentioned curved segment；Described external screw thread is laid on described thread segment corresponding part and corresponds to this arc-shaped side
On outer wall.
In above-mentioned steps one, the length direction along the solid round steel of strip extrudes a pair of planar, and obtaining section is in cydariform
The solid steel billet of strip, this cydariform is formed by a pair of straight flange and a pair of arc-shaped side tandem array, and this pair of straight flange is wherein right
Should be in the work surface of above-mentioned linkage section and above-mentioned curved segment, another side corresponds to the back of the body of the work surface of above-mentioned linkage section and above-mentioned curved segment
Face；Described external screw thread is laid on the outer wall corresponding to this pair of arc-shaped side on described thread segment corresponding part.
Between above-mentioned steps two and above-mentioned steps three, also there is second cold moudling operation, that is, adopt cold-press process pair
Thread segment corresponding part carries out cold moudling, makes thread segment corresponding part cylindrical.
After technique scheme, the U-bolt of the present invention, the work surface of its linkage section is plane, the work of curved segment
Face is the plane of bending, and both work surfaces seamlessly transit.Such U-bolt use when, its work surface with fastened
It is entirely face contact between thing, contact area reaches 100%, has good fastening effect.
In the present invention, the section of linkage section and curved segment all can arched or cydariform, i.e. inner side be in plane or inside and outside
All in plane, for simplified processing process, thread segment can be pressed into together with linkage section and curved segment that section is arched or cydariform.?
Thread segment can be reprocessed into cylinder, so that thread segment is worked more reliable.
The preparation method of U-bolt of the present invention, only need to carry out cold moudling, in length side by solid round steel to whole piece strip
To extrusion one or a pair of planar, then thread segment corresponding part is carried out roll tooth, the arc on thread segment corresponding part outer wall
Part forms external screw thread, finally again curved segment corresponding part is converted into bending, processing technique is extremely simple.In order that thread segment
Work more reliable, can by thread segment again cold moudling be cylindric.
Brief description
Fig. 1 is the structural representation of U-bolt in prior art；
Fig. 2 is the axonometric chart 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 example IV of the present invention；
Fig. 6-1 is the schematic cross-section of Fig. 6 middle connecting segment and curved segment.
Specific embodiment
Embodiment one：
The U-bolt of the present invention, embodiment one is as shown in figure 3, inclusion both sides right cylinder section parallel to each other 1 and connection two are straight
The curved segment 2 of shell of column, described right cylinder section 1 is divided into linkage section 11 and thread segment 12, described thread segment 12 pass through described linkage section 11 with
Described curved segment 2 is connected, and the outer wall of described thread segment 12 is laid with external screw thread.
Right cylinder section 1 and curved segment 2 are structure as a whole, and the section of the section of right cylinder section 1 and curved segment 2 is identical arch, such as schemes
Shown in 3-1, this arch has a straight flange 3 and the arc-shaped side 4 with this straight flange tandem array, and straight flange 3 is corresponding to be right cylinder section 1 He
The medial surface of curved segment 2, this medial surface is also linkage section 11 and the work surface of curved segment 2, and the work surface of linkage section 11 is plane, curved segment
2 work surface is the plane of bending, and the work surface of the work surface of linkage section 11 and curved segment 2 seamlessly transits and is integrally formed.Screw thread
The external screw thread of section 12 is laid on the outer wall corresponding to this arc-shaped side 4 on thread segment 12.
The preparation method of the present embodiment U-bolt, is achieved by the steps of：
First, using cold-press process, to strip, solid round steel carries out cold moudling, extrudes a plane along its length,
Obtain the solid steel billet of the arched strip in section, this arch has a straight flange and the arc-shaped side with this straight flange tandem array,
This straight flange corresponds to the linkage section of U-bolt and the work surface of curved segment；
2nd, according to U-bolt Len req, to the strip through step one cold moudling, solid steel billet cuts, and obtains
The base substrate of U-bolt, the base substrate of this U-bolt has right cylinder section corresponding part and the centre at two ends according to the structure of U-bolt
Curved segment corresponding part, right cylinder section corresponding part has thread segment corresponding part and linkage section corresponding part, linkage section correspondence portion
Divide and be located between corresponding thread segment corresponding part and curved segment corresponding part；
3rd, above-mentioned thread segment corresponding part is carried out roll tooth, correspond to upper on the outer wall of above-mentioned thread segment corresponding part
The part stating arc-shaped side forms external screw thread；
4th, using the appropriate section of the plane of step one gained as described linkage section corresponding part portion corresponding with described curved segment
The medial surface dividing, above-mentioned curved segment corresponding part is converted into bending according to the design requirement of U-bolt, that is, obtains U-bolt, described
The medial surface of linkage section corresponding part and described curved segment corresponding part corresponds to the work surface of described linkage section and described curved segment.
Embodiment two：
As shown in Fig. 4 and Fig. 4-1, the present embodiment is differed only in embodiment one：Thread segment 12 is cylindrical, screw thread
Section 12 external screw threads are laid on its columned outer wall.
The preparation method of the present embodiment is differed only in embodiment one：Between step 2 and step 3, also have
Second cold moudling operation, carries out cold moudling using cold-press process to thread segment corresponding part, makes thread segment correspondence portion
Divide cylindrical.And step 3 is changed to：This columned thread segment corresponding part is carried out roll tooth, in columned thread segment pair
Answer formation external screw thread on the outer wall of part.
Embodiment three：
The U-bolt of the present invention, embodiment three is as shown in figure 5, inclusion both sides right cylinder section parallel to each other 1 and connection two are straight
The curved segment 2 of shell of column, described right cylinder section 1 is divided into linkage section 11 and thread segment 12, described thread segment 12 pass through described linkage section 11 with
Described curved segment 2 is connected, and the outer wall of described thread segment 12 is laid with external screw thread.
Right cylinder section 1 and curved segment 2 are structure as a whole, and the section of the section of right cylinder section 1 and curved segment 2 is identical cydariform, such as schemes
Shown in 5-1, this cydariform is formed by a pair of straight flange 5 and a pair of arc-shaped side 6 tandem array, and a pair of straight flange 5 is corresponding to be right cylinder section 1 He
The medial surface of curved segment 2, and the lateral surface of right cylinder section 1 and curved segment 2, this medial surface is also linkage section 11 and the work surface of curved segment 2, even
The work surface connecing section 11 is plane, and the work surface of curved segment 2 is the plane of bending, and the work of the work surface of linkage section 11 and curved segment 2
Seamlessly transit as face and be integrally formed.The external screw thread of thread segment 12 is laid in and corresponds to the outer of this pair of arc-shaped side 6 on thread segment 12
On wall.
The preparation method of the present embodiment U-bolt, is achieved by the steps of：
First, using cold-press process, to strip, solid round steel carries out cold moudling, extrudes a pair of planar along its length,
Obtain the solid steel billet of strip that section is in cydariform, this cydariform is formed by a pair of straight flange and a pair of arc-shaped side tandem array, and this one
To straight flange, wherein correspond to the linkage section of U-bolt and the work surface of curved segment, another side corresponds to the connection of U-bolt
The back side of the work surface of section and curved segment；
2nd, according to U-bolt Len req, to the strip through step one cold moudling, solid steel billet cuts, and obtains
The base substrate of U-bolt, the base substrate of this U-bolt has right cylinder section corresponding part and the centre at two ends according to the structure of U-bolt
Curved segment corresponding part, right cylinder section corresponding part has thread segment corresponding part and linkage section corresponding part, linkage section correspondence portion
Divide and be located between corresponding thread segment corresponding part and curved segment corresponding part；
3rd, above-mentioned thread segment corresponding part is carried out roll tooth, correspond to upper on the outer wall of above-mentioned thread segment corresponding part
The part stating a pair of arc-shaped side forms external screw thread；
4th, using the appropriate section of one of plane of step one gained as described linkage section corresponding part and described curved
The medial surface of section corresponding part, above-mentioned curved segment corresponding part is converted into bending according to the design requirement of U-bolt, that is, obtains U-shaped
Bolt, the medial surface of described linkage section corresponding part and described curved segment corresponding part corresponds to described linkage section and described curved segment
Work surface.
Example IV：
As shown in Fig. 6 and Fig. 6-1, the present embodiment is differed only in embodiment three：Thread segment 12 is cylindrical, screw thread
Section 12 external screw threads are laid on its columned outer wall.
The preparation method of the present embodiment is differed only in embodiment three：Between step 2 and step 3, also have
Second cold moudling operation, carries out cold moudling using cold-press process to thread segment corresponding part, makes thread segment correspondence portion
Divide cylindrical.And step 3 is changed to：This columned thread segment corresponding part is carried out roll tooth, in columned thread segment pair
Answer formation external screw thread on the outer wall of part.
Claims (1)
1. a kind of preparation method of U-bolt, described U-bolt includes both sides right cylinder section parallel to each other and connects two right cylinder sections
Curved segment, described right cylinder section is divided into linkage section and thread segment, and described thread segment is connected with described curved segment by described linkage section,
It is laid with external screw thread on the outer wall of described thread segment；The work surface of described linkage section is plane, and the work surface of described curved segment is folding
Curved plane, and both work surfaces seamlessly transit；All in cydariform, this cydariform is by one in the section of described linkage section and described curved segment
Straight flange and a pair of arc-shaped side tandem array are formed, this pair of straight flange corresponds to above-mentioned work surface and its back side；Described thread segment
For cylindric, described external screw thread is laid on its columned outer wall；It is characterized in that：
Described preparation method is achieved by the steps of：
First, using cold-press process, to strip, solid round steel carries out cold moudling, along the length direction pressure of the solid round steel of strip
Go out a pair of planar, obtain the solid steel billet of strip that section is in cydariform, this cydariform is held in the mouth by a pair of straight flange and a pair of arc-shaped side head and the tail
Connect and form, this pair of straight flange, wherein correspond to the work surface of above-mentioned linkage section and above-mentioned curved segment, another side corresponds to above-mentioned
The back side of the work surface of linkage section and above-mentioned curved segment；
2nd, according to U-bolt Len req, to the strip through step one cold moudling, solid steel billet cuts, and obtains U-shaped
The base substrate of bolt, the base substrate of this U-bolt has the right cylinder section corresponding part at two ends and the curved of centre according to the structure of U-bolt
Section corresponding part, right cylinder section corresponding part has thread segment corresponding part and linkage section corresponding part, linkage section corresponding part position
Between corresponding thread segment corresponding part and curved segment corresponding part；
3rd, second cold moudling is carried out to thread segment corresponding part using cold-press process, make thread segment corresponding part be in cylinder
Shape；
4th, columned above-mentioned thread segment corresponding part is carried out roll tooth, outer in columned above-mentioned thread segment corresponding part
External screw thread is formed on wall；
5th, using the appropriate section of a plane of step one gained as described linkage section corresponding part portion corresponding with described curved segment
The medial surface dividing, above-mentioned curved segment corresponding part is converted into bending according to the design requirement of U-bolt, that is, obtains U-bolt, described
The medial surface of linkage section corresponding part and described curved segment corresponding part corresponds to the work surface of described linkage section and described curved segment.
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| CN201410421193.8A CN104295586B (en) | 2014-08-25 | 2014-08-25 | U-shaped bolt and manufacturing method thereof |
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| CN201410421193.8A CN104295586B (en) | 2014-08-25 | 2014-08-25 | U-shaped bolt and manufacturing method thereof |
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| CN104295586A CN104295586A (en) | 2015-01-21 |
| CN104295586B true CN104295586B (en) | 2017-02-15 |
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| 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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| 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 | ||
| US6852181B2 (en) * | 2001-10-23 | 2005-02-08 | 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 |
| CN102145443B (en) * | 2010-02-05 | 2013-02-27 | 上海新申金属制品有限公司 | Method for processing U-shaped bolts |
| CN201661573U (en) * | 2010-03-09 | 2010-12-01 | 泉州市长源机械发展有限公司 | U-bolt |
| 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 |
| CN103206444B (en) * | 2013-03-15 | 2015-02-04 | 广东富华工程机械制造有限公司 | Preforming device of U-shaped 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 |
| CN103537878B (en) * | 2013-11-04 | 2015-07-08 | 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 |
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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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