CN202398774U - Reducing device for large-specification bolt - Google Patents
Reducing device for large-specification bolt Download PDFInfo
- Publication number
- CN202398774U CN202398774U CN2012200092673U CN201220009267U CN202398774U CN 202398774 U CN202398774 U CN 202398774U CN 2012200092673 U CN2012200092673 U CN 2012200092673U CN 201220009267 U CN201220009267 U CN 201220009267U CN 202398774 U CN202398774 U CN 202398774U
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- contracts
- bar
- bolt
- die
- mould
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Abstract
The utility model relates to a reducing device for a large-specification bolt, which comprises a rod reducing die. The rod reducing die is fixed into a sunk sleeve, a rod reducing guide sleeve and a rod reducing connection die are fixed to the upper portion and the middle of the rod reducing die respectively, an upper punch is arranged on the exactly upper portion of the rod reducing die, and an ejector rod is arranged at the bottom of the rod reducing die 1. The reducing device has the advantages that the problem of disqualification of thread pitch diameters due to inconsistent blank diameters in an original turning technical process of large-specification bolts is solved, production cost is greatly reduced, the pitch diameter of one bolt is originally turned in about five minutes while the bolt is reduced only in a few seconds, and material cost is greatly saved as turning and removing of residual materials are omitted after the die is used as compared with turning.
Description
Technical field
The utility model relates to a kind of bolt, relates in particular to a kind of bolt undergauge device.
Background technology
The wind-powered electricity generation bolt plays crucial effects in the whole wind electric system; And along with the power of wind power generating set increases year by year; Develop into 6 present megawatt wind power generating set from 1.5 initial megawatt generation units; Wind-powered electricity generation is also increasing with the specification of bolt, connects required intensity otherwise just can not adapt to generating set tower tube.
The M30-M36 that present bolt specification is used from original low megawatt increases to M39-M64.Along with the continuous increase of bolt external diameter, also increasing to the difficulty of processing of bolt thread part.Machining screw has a lot of methods, processes type, rolles over the system thread forming, twists and process type etc., in numerous processing modes like car; The advantage that screw thread grinds the type of processing is more outstanding; It is high to grind the accuracy of thread of making, and the threaded metal streamline that grinds after making can not cause fracture because of processing, thereby intensity is high; Be difficult for threading off, other processing method all can't reach this requirement.
But screw thread is rolled over the essential bolt thread base footpath problem that solves earlier of system processing.Making thread billet dia has dual mode usually, a kind ofly is machined, promptly at all kinds of lathes satisfactory thread billet dia of getting on the bus out; Another kind is the bar that contracts, and promptly on forcing press, obtains the stone roller base footpath of screw thread through the mode of the small pole diameter that contracts.Adopted the small dimension bolt of low-carbon alloy steel generally all to adopt the bar mode that contracts to make thread billet dia in the past; Because the stick force that contracts that it is required is smaller; This power can not produce destruction for the internal structure of work piece such as metal streamline; Can make material itself fine and close more through this cold extrusion on the contrary, all be favourable for the follow-up stone roller system processing and the overall performance of bolt.
But because the wind-powered electricity generation bolt of M39-M64, employing all be high-intensity medium carbon alloy steel, the required pulling force that bears of the bar that contracts is bigger, exists when contracting bar to break the risk of inner flow-line, so all is to adopt basic machining screw to grind the base footpath in the industry.But defectives such as the car base directly exists, and processing cost is high, the base of car system footpath size external diameter precision inconsistent, car system is relatively poor.Overcome the above problems, just must develop the undergauge device of big specification bolt.
Summary of the invention
The utility model technical issues that need to address have provided a kind of big specification bolt undergauge device, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the utility model is realized through following technical scheme:
The utility model comprises: the bar mould contracts; The described bar mould that contracts is fixed in the sunk type sleeve; On the top of the described bar mould that contracts and the middle part bar fairlead that fixedly contracts respectively connect mould with the bar that contracts; A upper punch is settled on positive top at the described bar mould that contracts; Settle a knock-pin in described bottom of contracting bar mould 1.
Compared with prior art, the beneficial effect of the utility model is: solved big specification bolt because of the defective problem of the base inconsistent pitch diameter of thread that causes in footpath in the script Vehicle Processing technical process, greatly reduced production cost simultaneously; Originally the footpath needs about 5 minutes in the Che Yigen bolt, and the bolt that contracts only needs several seconds; And compared with Vehicle Processing, adopt this mold after, remove excess stock because of not needing turning, practiced thrift material cost greatly.
Description of drawings
Fig. 1 is the structural representation of the utility model.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail:
Visible by Fig. 1: the utility model comprises: bar mould 1 contracts; The described bar mould 1 that contracts is fixed in the sunk type sleeve 4; On the top of the described bar mould 1 that contracts and the middle part bar fairlead 2 that fixedly contracts respectively connect mould 3 with the bar that contracts; Settle a upper punch 5 on the positive top of the described bar mould 1 that contracts; Settle a knock-pin 6 in described bottom of contracting bar mould 1.
The crankshaft press of the big pressure of the bar process using that originally contracts is main motive power, is equipped with the bar mould that contracts of particular design, and the bolt that makes original thick bar footpath reaches the purpose that attenuates through the cold-stamped principle.
The main design part and the purposes of the utility model:
A. the bar mould contracts: it mainly acts on is to make original bar footpath from the coarse to fine through this mould.These parts are divided into inner ring and outer ring, compress through interference fit.The material of inner ring is a hard alloy steel, and this material hardness is high, and wearability is good, can improve service life greatly.The material of outer ring is a steel alloy, and is not easy to crack because of the toughness of steel alloy is better than hard alloy steel, can play the effect of protection inner ring.
B. the bar fairlead contracts: material is the Cr12MoV after hardening, and this material hardness is higher, and certain toughness and wearability are arranged, and cost is lower.Main effect is a linearity of in the bar process that contracts, guaranteeing product, makes bar portion not variable curved.
C. the bar that contracts connects mould: material is identical with the bar fairlead that contracts, and it mainly acts on is to guarantee to contract bar part linearity.Material is in the bar mould that contracts contracts the bar deformation process, and the inhomogeneous and reasons such as mould roughness or other precision owing to hardness own bend when distortion easily.After the supporting bar that contracts connects mould, just can solve this phenomenon.
D. sunk type sleeve: material is 40Cr, and this toughness of material is good, and certain intensity is arranged, and can bear certain pulling force and pressure.The main effect of this mould is the mould such as bar mould that fixedly contracts, and leans on its fixedly contract processing length of bar mould simultaneously, and Ben Mo can process the bar that contracts of 300～500mm bolt.
E. upper punch: material is 40Cr.This mould is connecting the slide block on the forcing press, through the motion of press crankshaft, can knee-action, and work piece is pressed in the bar mould that contracts, accomplish the bar that contracts.
F. knock-pin: material is the T10A with higher hardness and certain intensity, and main effect is the work piece that ejects the bar that contracts.
Claims (1)
1. one kind big specification bolt undergauge device, it is characterized in that comprising: the bar mould contracts; The described bar mould that contracts is fixed in the sunk type sleeve; On the top of the described bar mould that contracts and the middle part bar fairlead that fixedly contracts respectively connect mould with the bar that contracts; A upper punch is settled on positive top at the described bar mould that contracts; Settle a knock-pin in described bottom of contracting bar mould 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200092673U CN202398774U (en) | 2012-01-10 | 2012-01-10 | Reducing device for large-specification bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200092673U CN202398774U (en) | 2012-01-10 | 2012-01-10 | Reducing device for large-specification bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202398774U true CN202398774U (en) | 2012-08-29 |
Family
ID=46696450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200092673U Expired - Lifetime CN202398774U (en) | 2012-01-10 | 2012-01-10 | Reducing device for large-specification bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202398774U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637155A (en) * | 2018-05-09 | 2018-10-12 | 合肥工业大学 | A kind of bolt production mold, production method and the bolt produced |
| CN110328270A (en) * | 2019-05-31 | 2019-10-15 | 南通海洲紧固件制造有限公司 | Bolt blank undergauge treatment process |
-
2012
- 2012-01-10 CN CN2012200092673U patent/CN202398774U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637155A (en) * | 2018-05-09 | 2018-10-12 | 合肥工业大学 | A kind of bolt production mold, production method and the bolt produced |
| CN108637155B (en) * | 2018-05-09 | 2020-03-17 | 合肥工业大学 | Bolt production mold, production method and manufactured bolt |
| CN110328270A (en) * | 2019-05-31 | 2019-10-15 | 南通海洲紧固件制造有限公司 | Bolt blank undergauge treatment process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120829 |