CN204942215U - A kind of socket cap connecting bolt - Google Patents
A kind of socket cap connecting bolt Download PDFInfo
- Publication number
- CN204942215U CN204942215U CN201520708894.XU CN201520708894U CN204942215U CN 204942215 U CN204942215 U CN 204942215U CN 201520708894 U CN201520708894 U CN 201520708894U CN 204942215 U CN204942215 U CN 204942215U
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- CN
- China
- Prior art keywords
- socket cap
- bolt
- polished rod
- connecting bolt
- screw rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model relates to a kind of socket cap connecting bolt, comprises socket cap and screw rod, connects polished rod bottom socket cap, connecting screw rod bottom polished rod, and polished rod and screw rod joint are provided with two arcuate structure; Polished rod outer surface is provided with two symmetrical square flat sides.The utility model compared with the existing technology, its advantage is: the screw rod of this socket cap connecting bolt and polished rod joint are provided with two arcuate structure, under the prerequisite of satisfied assembling, the R angle of transition zone is set at least more than R1.6, improve the working life of connecting bolt to greatest extent, avoid this bolt heat process transition of stress to concentrate and the frequent handling of subsequent production application cause the fatigue fracture of bolt; Secondly, be provided with two mutual symmetrical square flat sides on the surface at polished rod, conveniently frequently load and unload; The material selection 40CrNiMoA alloyed steel material of this socket cap connecting bolt, bolt hardness is set to HRC36 ~ 39, and working life is more than 30 times of original bolt life.
Description
[technical field]
The utility model relates to hardware fastening, specifically a kind of socket cap connecting bolt be fastenedly connected being applied to powder metallurgy die.
[background technique]
The bolt that powder metallurgy die is fastenedly connected, because it frequently loads and unloads and Reusability, and because of the instant heating of Environmental Conditions and cold, what working life of this original connecting bolt was short only has seven days, long two weeks only, this situation seriously hinders the normal production of factory, after failure analysis research, conclude and show that this bolt working life of short duration main cause is as follows: 1. the unreasonable structure of design, polished rod and screw rod transition zone are below 3 millimeters, and transition zone inclination angle does not have the transition of R arc, such structure, cold in this transition zone of product, hot working stress is concentrated, in addition frequent handling have work-hardening to be inclined to, therefore polished rod is connected transition zone very easy-rupturing with screw rod, 2. product material selection is common medium-carbon steel, does not possess enough toughness, when repeatedly loading and unloading, and very fatiguability fracture, 3. heat treatment hardness is designed into HRC45 ~ 50, the carbon steel material of this hardness, and the fragility of product own is large, repeatedly loads and unloads in addition, causes rapid fracture.
For above underproof design and irrational materials and process program, the utility model has formulated brand-new technological scheme, structure and the rational socket cap connecting bolt of strength character of the flat side of a kind of cylinder headband are provided, meet the requirement that client normally produces, solve a client's difficult problem.
[summary of the invention]
The purpose of this utility model is that the frequent installing/dismounting of bolt connecting fastening use for original powder metallurgy die causes Fast Wearing or fracture, cause the problem that bolt working life is extremely low, design the socket cap connecting bolt of a kind of wear-resisting, anti-vibration, shock resistance, anti-brittle fracture, long service life, ensure the normal manufacturing operation of client.
To achieve these goals, design a kind of socket cap connecting bolt, comprise socket cap and screw rod, polished rod is connected bottom socket cap, connecting screw rod bottom polished rod, polished rod and screw rod joint are provided with two arcuate structure, and polished rod outer surface is provided with two square flat sides symmetrical mutually.
The transition cambered surface R angle of described two arcuate structures is more than R1.6.
Described socket cap connecting bolt adopts the manufacture of 40CrNiMoA alloyed steel.
The utility model compared with the existing technology, its advantage is: the screw rod of this socket cap connecting bolt and polished rod joint are designed to two arcuate structure, and under the prerequisite of satisfied assembling, the R angle of this transition zone is designed at least more than R1.6, improve the working life of connecting bolt to greatest extent, avoid this bolt heat process transition of stress to concentrate and frequently load and unload the short-term fatigue fracture causing bolt in subsequent production application; Secondly, be provided with two mutual symmetrical square flat sides on the surface at polished rod, conveniently frequently load and unload; The material selection 40CrNiMoA alloyed steel of this socket cap connecting bolt, and the hardness of this connecting bolt is adapted to HRC36 ~ 39, the utility model bolt is made to possess sufficient intensity, the superpower impact toughness of tool simultaneously, ensure that and substantially increase the working life of bolt by the comprehensive mechanical performance such as anti-vibration, shock resistance, anti-brittle fracture that this bolt is enough.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model;
In figure: 1. socket cap 2. screw rod 3. polished rod 4. square flat side;
Specify Fig. 1 as Figure of abstract of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in further detail, and the structure of this device and principle are very clearly concerning the people of this specialty.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, socket cap connecting bolt of the present utility model comprises socket cap and screw rod, polished rod is connected bottom socket cap, connecting screw rod bottom polished rod, polished rod and screw rod joint are provided with two arcuate structure, and under the prerequisite of satisfied assembling, the R angle of this transition zone are designed at least more than R1.6, improve the working life of connecting bolt to greatest extent, avoid this bolt heat process transition of stress to concentrate and frequently load and unload the wearing and tearing and the fracture that cause bolt in subsequent production application; Secondly, be provided with two mutual symmetrical square flat sides on the surface at polished rod, conveniently frequently load and unload.The material selection 40CrNiMoA alloyed steel of the socket cap connecting bolt that the design relates to, in order to fully improve the anti-fatigue performance of this socket cap connecting bolt, takes into account the impact toughness of product simultaneously, the hardness of this bolt is set as 36 ~ 39HRC.The socket cap connecting bolt that the utility model manufactures and designs, possesses high strength, and the resistance to repeated stock toughness of tool, guarantees the comprehensive mechanical performance such as anti-vibration, shock resistance, anti-brittle fracture that this bolt is enough simultaneously.Installation dimension of the present utility model meets the secure connection in powder metallurgy die field and fastening usage requirement completely, and integrated performance index is far away higher than original product manufactured and designed, and working life is more than 30 times of existing product working life.
Claims (3)
1. a socket cap connecting bolt, comprises socket cap and screw rod, it is characterized in that connecting polished rod bottom socket cap, connecting screw rod bottom polished rod, and polished rod and screw rod joint are provided with two arcuate structure, and polished rod outer surface is provided with two square flat sides symmetrical mutually.
2. a kind of socket cap connecting bolt as claimed in claim 1, is characterized in that the transition cambered surface R angle of described two arcuate structures is more than R1.6.
3. a kind of socket cap connecting bolt as claimed in claim 1, is characterized in that described socket cap connecting bolt adopts the manufacture of 40CrNiMoA alloyed steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520708894.XU CN204942215U (en) | 2015-09-14 | 2015-09-14 | A kind of socket cap connecting bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520708894.XU CN204942215U (en) | 2015-09-14 | 2015-09-14 | A kind of socket cap connecting bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204942215U true CN204942215U (en) | 2016-01-06 |
Family
ID=55009652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520708894.XU Active CN204942215U (en) | 2015-09-14 | 2015-09-14 | A kind of socket cap connecting bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204942215U (en) |
-
2015
- 2015-09-14 CN CN201520708894.XU patent/CN204942215U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 200124 room 803, No. 39, Lane 1200, Changqing Road, Pudong New Area, Shanghai Patentee after: SHANGHAI CAIFU MACHINERY Co.,Ltd. Address before: 201801 room 5103, building 5, No. 2968, Bao'an highway, Malu Town, Jiading District, Shanghai Patentee before: SHANGHAI CAIFU MACHINERY Co.,Ltd. |