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An embedded outer knurled nut and its manufacturing method

A knurled nut and embedded technology, applied in the direction of nuts, threaded fasteners, connecting components, etc., can solve the problems of unsatisfactory, low material hardness, etc., and achieve the goal of reducing phase transition stress, high hardness, and reducing cracks Effect

Inactive Publication Date: 2016-08-24
奥展实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

External knurled nuts made of traditional materials are affected by the environment and cannot meet the requirements of high temperature and severe cold. In the prior art, metal materials are often used to replace traditional materials to overcome the above technical defects, but the metal materials used are mostly copper-containing Copper alloy with a high amount and low material hardness cannot meet the needs of the rapidly developing industry and construction industry

Method used

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  • An embedded outer knurled nut and its manufacturing method
  • An embedded outer knurled nut and its manufacturing method
  • An embedded outer knurled nut and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] like figure 1 As shown, an embedded outer knurled nut is characterized in that it includes a plurality of inner nut bodies (103, 104, 105) and an outer nut body (102); the plurality of inner nut bodies and a The outer nut bodies are all provided with outer knurling (not shown); the centers of the plurality of inner nut bodies are hollow threaded cavities; the diameters of the threaded cavities of the plurality of inner nut bodies match the diameter of the bolt (101) ; When installed on bolts, the outer nut body and multiple inner nut bodies are installed in a stepped shape in the axial direction from top to bottom from the direction of the bolt head, and the radius of the lower inner nut body is larger than that of the upper inner nut body Radius; the sum of the thicknesses of the plurality of inner nut bodies is less than the radial length of the bolt; when installed on the bolt, the plurality of inner nut bodies are completely covered by the outer nut body; the cavity...

Embodiment 2

[0056] like figure 1 As shown, an embedded outer knurled nut is characterized in that it includes a plurality of inner nut bodies (103, 104, 105) and an outer nut body (102); the plurality of inner nut bodies and a The outer nut bodies are all provided with outer knurling (not shown); the centers of the plurality of inner nut bodies are hollow threaded cavities; the diameters of the threaded cavities of the plurality of inner nut bodies match the diameter of the bolt (101) ; When installed on bolts, the outer nut body and multiple inner nut bodies are installed in a stepped shape in the axial direction from top to bottom from the direction of the bolt head, and the radius of the lower inner nut body is larger than that of the upper inner nut body Radius; the sum of the thicknesses of the plurality of inner nut bodies is less than the radial length of the bolt; when installed on the bolt, the plurality of inner nut bodies are completely covered by the outer nut body; the cavity...

Embodiment 3

[0076] like figure 1As shown, an embedded outer knurled nut is characterized in that it includes a plurality of inner nut bodies (103, 104, 105) and an outer nut body (102); the plurality of inner nut bodies and a The outer nut bodies are all provided with outer knurling (not shown); the centers of the plurality of inner nut bodies are hollow threaded cavities; the diameters of the threaded cavities of the plurality of inner nut bodies match the diameter of the bolt (101) ; When installed on bolts, the outer nut body and multiple inner nut bodies are installed in a stepped shape in the axial direction from top to bottom from the direction of the bolt head, and the radius of the lower inner nut body is larger than that of the upper inner nut body Radius; the sum of the thicknesses of the plurality of inner nut bodies is less than the radial length of the bolt; when installed on the bolt, the plurality of inner nut bodies are completely covered by the outer nut body; the cavity ...

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Abstract

The invention belongs to the field of manufacturing of mechanical components and parts, and in particular relates to an embedded outer knurled nut and a manufacturing method thereof. The manufacturing method of the embedded outer knurled nut comprises an alloy material manufacturing step and a nut casting molding step. According to the embedded outer knurled nut and the manufacturing method thereof disclosed by the invention, a copper alloy material in the prior art is replaced by using an alloy metal material, and the manufactured embedded outer knurled nut is high in hardness and high in wear resistance, and can meet the high-standard requirements of industries and construction industries; and by adopting a step quenching process, the phase transformation stress generated in a process of transforming an embedded outer knurled nut material structure into martensite from austenite can be effectively reduced, and the generation of cracks in a transformation process can be effectively reduced. Compared with similar products prepared from copper alloy materials in the prior art, the hardness of the embedded outer knurled nut prepared by using the manufacturing method disclosed by the invention can be increased by 39-45%, the wear resistance can be increased by 18-22%, and the cracking rate can be reduced by 13-20%.

Description

technical field [0001] The invention belongs to the field of manufacturing mechanical parts, in particular to an embedded outer knurled nut and a manufacturing method thereof. Background technique [0002] Screws and nuts are common fasteners in various industries. The knurling added to the outer surface of the nut is specially designed to facilitate hand-tightening operation or surface friction with other components. External knurled nuts made of traditional materials are affected by the environment and cannot meet the requirements of high temperature and severe cold. In the prior art, metal materials are often used to replace traditional materials to overcome the above technical defects, but the metal materials used are mostly copper-containing Copper alloys with a high amount and low material hardness cannot meet the needs of the rapidly developing industry and construction industry. Contents of the invention [0003] The object of the present invention is to provide a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/60C22C38/36C22C33/04C21D1/19F16B37/00
Inventor 陈双周礼明
Owner 奥展实业股份有限公司
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