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Method for producing whole metal self-locking nut

A technology of self-locking nuts and manufacturing methods, applied in the direction of metal extrusion dies, etc., can solve the problem that all-metal self-locking nuts cannot be used repeatedly for 5 times, and achieve the effect of low specifications

Inactive Publication Date: 2009-07-22
HUDONG HEAVY MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacturing method of the present invention solves the technical problem that the all-metal self-locking nut cannot be used repeatedly 5 times by rationally selecting the nut raw material and proper heat treatment, so as to meet the operation reliability of the marine diesel engine and reduce the production cost

Method used

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  • Method for producing whole metal self-locking nut
  • Method for producing whole metal self-locking nut
  • Method for producing whole metal self-locking nut

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Experimental program
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Effect test

Embodiment Construction

[0037] The manufacturing method of the all-metal self-locking nut of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but this should not limit the protection scope of the present invention.

[0038] The key to the locking function of the all-metal self-locking nut is to deform the nut port into an ellipse through hydraulic extrusion, and to rely on the friction torque generated by itself during the fastening process with the bolt to play an anti-loosening function. The feature of the present invention is that after a large number of tests, a special all-metal self-locking nut port part extrusion die is designed. Under the quantified pressure of the hydraulic press, the nut port part realizes shaped and quantitative deformation, and generates friction torque itself.

[0039] Different metal materials will have different effects on the locking function of all-metal self-locking nuts under different heat...

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PUM

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Abstract

The invention relates to a method for manufacturing a full-metal self-locking nut, which manufactures the nut by the prior process, and then utilizes an extrusion method to extrude one end of the nut to deform a screw hole at the end. The method specifically comprises the following steps: (1) selecting a base material for the self-locking nut; (2) processing external dimensions, and tapping an internal thread; (3) carrying out metallographic thermal treatment; (4) designing and manufacturing a mould, wherein a groove is arranged in the mould, the upper part of the groove is orthohexagonal, the orthohexagonal diameter is equal to the diameter of the self-locking nut, the bottom of the groove is elliptic, the length of an elliptic long shaft is larger than the diameter of the self-locking nut, and the length of a short shaft of the groove is smaller than the diameter of the self-locking nut; (5) utilizing a self-locking nut in an extrusion mould of a hydraulic press; and (6) taking out the self-locking nut from the mould and checking the self-locking nut. The full-metal self-locking nut manufactured by the method still has locking function after five times of repeated use, can be widely applied to the field of other engineering machinery, ensures the reliability of quality, and has low cost.

Description

technical field [0001] The invention relates to a fastener, in particular to an all-metal self-locking nut, which is mainly used for the self-locking nut used in the manufacture of marine diesel engines. This kind of self-locking nut can ensure the normal operation of the important moving parts of the marine diesel engine under the harsh conditions of high temperature above 350°C, high vibration frequency, and many chemical corrosions, and prevent the parts from loosening and locking. It can also be widely used in ships, automobiles, Various construction machinery fields such as mines, ports, railways, etc., achieve universality and interchangeability in different places around the world. Background technique [0002] During the tightening process of the all-metal self-locking nut and the fastener bolt, the tightening torque is applied according to the technical specifications of the marine diesel engine, and at the same time, the function of preventing the loosening of the ...

Claims

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Application Information

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IPC IPC(8): B21C23/00B21C25/02
Inventor 李玉林
Owner HUDONG HEAVY MACHINERY
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