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Nut production process

A production process and nut technology, applied in the field of nut processing, can solve problems such as fractures or cracks, formation of accident sources, easy rust and corrosion, etc., to achieve the effect of not easy to break, prolong service life, and improve bolt life.

Inactive Publication Date: 2019-03-29
重庆旺达汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when the nut is in a relatively humid environment, it is prone to rust and corrosion, which eventually leads to breakage or cracks, forming a potential source of accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The present invention will be further described below in conjunction with embodiment.

[0018] The invention discloses a nut production process, the processing steps include:

[0019] S1: The blank is made by casting process, and the weight ratio of each chemical composition of the blank should meet the following requirements: C 0.28~0.32, Mn 0.32~0.45, Zn 0.05~0.09, Si 0.15~0.25, La 0.01~0.03 , P≤0.015, S≤0.015, Ni 0.50~1.20, Sn 0.15~0.25, Al 0.15~0.25, Mo 0.2~0.5, and the balance is iron;

[0020] S2: Put the blank into the cavity of the mold, cold heading extrusion molding, and make the nut blank;

[0021] S3: Turning and tapping the nut blank;

[0022] S4: heat treatment, heat the nut blank at 900°C for 3 hours, then raise the furnace temperature to 1100°C, keep heating for 3 hours, then take it out of the furnace for quenching, put it into the furnace after quenching, and raise the furnace temperature to 550°C , keep warm for 6-8 hours, and then cool with water-...

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Abstract

The invention discloses a nut production process. The process comprises the following steps that S1, through a casting process, a workblank part is made, and the workblank part comprises, by weight ratio, 0.28 to 0.32 of C, 0.32 to 0.45 of Mn, 0.05 to 0.09 of Zn, 0.15 to 0.25 of Si, 0.01 to 0.03 of La, not larger than 0.015 of P, not larger than 0.015 of S, 0.50 to 1.20 of Ni, 0.15 to 0.25 of Sn,0.15 to 0.25 of Al, 0.2 to 0.5 of Mo and the balance iron; S2, the workblank part is put into a mold cavity, cold heading extrusion molding is carried out, and the nut workblank is made; S3, the nut workblank is turned and tapped; S4, heat treatment is carried out; S5, surface treatment is carried out, cleaning oil removal is carried out, blackening treatment is carried out, static electricity manner is adopted to spray an anti-corrosion agent to the nut, and the sprayed nut is cured to obtain a nut finished product. The nut produced through the nut production process has the hardness value and strength value needed by the high-strength nut, is not prone to being corroded and long in service life.

Description

technical field [0001] The invention relates to the technical field of nut processing, in particular to a nut production process. Background technique [0002] Nuts are commonly used fasteners in the machinery industry. The current processing method is generally turning and forming. The strength is often difficult to guarantee. Sometimes unsafe phenomena such as fracture occur during use, which is very harmful to industrial production. Therefore, researching and improving the production method of high-strength nuts to ensure the quality stability of high-strength nuts plays an important role in the development of technology and economy. In addition, when the nut is in a relatively humid environment, it is prone to rust and corrosion, which eventually leads to breakage or cracks, forming a potential source of accidents. Contents of the invention [0003] In view of the deficiencies in the above technologies, the purpose of the present invention is to provide a nut producti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C21D1/18C21D6/00C21D9/00C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12
Inventor 张叶黄宋挺金宋炜杰
Owner 重庆旺达汽车零部件有限公司
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