Processing technology for preventing head of stainless steel screw from cracking to improve product precision

A technology for preventing stainless steel and processing technology, applied in the field of stainless steel screw processing technology, can solve problems such as affecting the use of stainless steel screws, processing control screw headshots, etc., to achieve the effect of increasing aesthetics, improving quality and precision, and reducing headshot rate.

Inactive Publication Date: 2019-04-16
中山市固耐特金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the insufficient processing of materials and improper processing control in the production process of existing stainless steel screws, the produced screws are prone to head bursting, which affects the use of stainless steel screws, because the present invention provides a solution for the phenomenon of stainless steel screw head bursting. A new production process to reduce the phenomenon of stainless steel screw head burst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] As a preferred embodiment of the present invention, the processing temperature of the disk element in step 1 is 800-1000 degrees Celsius, and the processing time is 30-50 minutes.

[0030] In this embodiment, in order to prevent the hardness of the disk from being too high due to the high carbon content in the disk, the carbon content of the disk is reduced by adding and annealing steps, and the hardness of the disk is increased. Many experiments show that the heating temperature is 800-1000 Celsius, the processing time is 30-50 minutes for the best match.

Embodiment 2

[0032] As a preferred embodiment of the present invention, the lubricant in step 2 is sodium soap.

[0033] In this embodiment, because the coefficient of friction of the phosphate film is not very low, sufficient lubricity during processing cannot be given, thereby forming a firm metal soap layer by reacting with sodium soap, thereby increasing the lubricity of the surface of the rough embryo, making subsequent processing more efficient fine.

Embodiment 3

[0035] As a preferred embodiment of the present invention, the time for the two washings in step 2 is 10 minutes and 20 minutes respectively.

[0036] In this embodiment, different cleaning times are adopted according to different attachments on the surface of the stainless steel screw, which can save time and save water resources to avoid waste of resources.

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PUM

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Abstract

The invention discloses a processing technology for preventing the head of a stainless steel screw from cracking to improve product precision. The processing technology comprises the steps of wire rodtreatment, annealing, pickling, cold drawing, forming, tapping, heat treatment, coating and the like. The hardness of stainless steel can be improved by decarbonizing and pickling a wire rod to avoidthe phenomenon that the head is prone to cracking due to the fact that a material is brittle caused by excessive high carbon content, meanwhile, the treatment further enables the luster of the stainless steel to be brighter, and the aesthetics of the stainless steel screw is increased; the strength of the screw head can be reduced through cold quenching and sintering treatment after tapping is carried out, but the toughness of the stainless steel is increased, the situation that the hardness of the stainless steel is poor due to excessive increase of the hardness of the stainless steel is avoided, the phenomenon of head cracking caused by external force can be reduced by electroplating a layer of copper plating film on the screw head of the stainless steel screw, the head cracking rate ofthe stainless steel screw is reduced, and the quality and the precision are improved.

Description

technical field [0001] The invention relates to the technical field of stainless steel screw processing technology, in particular to a processing technology for preventing stainless steel screw heads from bursting and improving product precision. Background technique [0002] In daily life, screws are the most common locking components. Generally speaking, in addition to being used to lock various large mechanical equipment and furniture, screws are more widely used in the assembly and fixing of various small electronic, metal and mechanical devices. [0003] With respect to the general existing screw structure, the screw is mainly composed of a stud and a nut, and the stud has ring-shaped rotating threads. When the screw is used to lock two components in a device, a tool (such as a screwdriver) is usually placed on the outer edge of the nut, and the stud is inserted into the screw hole of the device to be locked, and rotates according to the thread. The screws are penetra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 廖勇
Owner 中山市固耐特金属制品有限公司
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