Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for manufacturing high-strength bolt

A technology of high-strength bolts and manufacturing technology, applied in the field of bolt manufacturing technology, can solve problems such as bolt longitudinal fatigue, achieve consistent tensile strength, high mechanical and physical properties, and improve the effect of fatigue resistance

Active Publication Date: 2011-12-21
浙江裕泰汽车配件有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For this reason, the technical problem to be solved by the present invention lies in the problem that the bolts produced by the grinding method in the manufacturing process of high-strength bolts in the prior art are prone to longitudinal fatigue, thus proposing a method that can improve the tensile fatigue strength of the bolts Manufacturing process of high-strength bolts

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for manufacturing high-strength bolt
  • Process for manufacturing high-strength bolt
  • Process for manufacturing high-strength bolt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] figure 1 , figure 2 It is a specific embodiment of the manufacturing process of the high-strength bolts described in the present invention. Taking the production of a bolt used for the cylinder head of an automobile engine as an example, the bolt includes a bolt head 1 and a stem 2, and the stem The length of the part 2 is about 102 mm, including a guide neck 3 with a length of about 5 mm and a screw 4 with a diameter of 97 mm. The guide neck 3 is a cylinder with a diameter of about 9.6 mm, and the screw 4 is a cylinder with a diameter of about 8.4 mm. The bolt head The part 1 is cylindrical, with a diameter of about 15mm and a length of 13.5mm. It has an open cavity built in. The cavity is from the outer surface of the bolt head 1 to the inner 12-point flower-shaped chamfer, and the inner 12 Corner flower-shaped cylinder 6 and bottom cone 7, such as figure 1 shown. The manufacturing process steps of described bolt are as follows:

[0035] ①Choose the appropriate s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a process for manufacturing a high-strength (above) bolt. The process comprises the following steps: selecting a proper steel material, and cutting out a cylindrical blank with proper size; molding the head part and the rod part of the bolt by adopting cold extrusion technology; heating; manufacturing the rod part, including coarse grinding and fine grinding; detecting injury by magnetic powder; manufacturing screw; and performing surface mechanical reinforcement and corrosion resistance treatment. The process solves the technical problems of insufficient strength and fatigue fracture which are easily generated on the bolt existing in the prior art for manufacturing the high-strength bolt, and is a high-strength bolt manufacturing process capable of improving tensile and fatigue strength resistance of the bolt.

Description

technical field [0001] The invention relates to a bolt manufacturing process, in particular to an ultra-high-strength bolt manufacturing process. Background technique [0002] A bolt is a type of fastener consisting of a head and a shank, usually in cooperation with a nut, and is used to fasten and connect two parts with through holes. Bolts are divided into high-strength bolts and ordinary bolts according to their performance. Chinese patent document CN1443946A discloses a manufacturing process for high-strength bolts above 1300 MPa, which includes blanking process, blank processing process, annealing process, cold heading forming process, turning rod part process, quenching and tempering process, grinding process, flaw detection process, thread rolling process, rolling fillet process and shot peening process to form composite strengthening process, surface treatment process and flaw detection process, and the annealing process before the cold heading forming process adopt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
Inventor 沈永瑞
Owner 浙江裕泰汽车配件有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com