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Manufacturing process of screw

A production process and screw technology, which is applied in the direction of screws, threaded fasteners, connecting components, etc., can solve problems such as difficulty in ensuring the strength of screws, industrial production hazards, and fracture of rods, so as to increase hardness, improve processing performance, and reduce hardness. Effect

Inactive Publication Date: 2014-12-17
无锡市第二标准件制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current screw strength is often difficult to guarantee, and sometimes unsafe phenomena such as U-turn and rod breakage occur during use, which is very harmful to industrial production. Therefore, it is necessary to provide a high-strength, high-quality screw manufacturing process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A manufacturing process for screws, comprising the following steps:

[0021] (1) Wire preparation: the wire is made of stainless steel, wherein the stainless steel contains less than 0.2% carbon, less than 0.02% aluminum, less than 0.02% copper, 0.5% manganese, and 0.5% nickel ;

[0022] (2) Annealing: Keep the wire at 350°C for 100 minutes and cool it naturally;

[0023] (3) Pickling: Soak the annealed wire in 25% hydrochloric acid for 10 minutes, wash it with water, then soak it in 5% phosphate solution for 10 minutes, wash it with water, and apply an appropriate amount of lubricant ;

[0024] (4) Forming: put the pickled wire in the wire drawing machine to draw it to the required diameter, and cold heading;

[0025] (5) Grinding: Fix one tooth plate, and the other movable tooth plate drives the product to move, and forms the required thread by extrusion;

[0026] (6) Heat treatment: Put the rolled screw in a furnace at 230°C for 150 minutes, then raise the temper...

Embodiment 2

[0028] A manufacturing process for screws, comprising the following steps:

[0029] (1) Wire preparation: the wire is made of stainless steel, wherein the stainless steel contains less than 0.2% carbon, less than 0.02% aluminum, less than 0.02% copper, 0.5% manganese and 1.5% nickel ;

[0030] (2) Annealing: Keep the wire at 300°C for 60 minutes and cool it naturally;

[0031] (3) Pickling: Soak the annealed wire in 20% hydrochloric acid for 5 minutes, wash it with water, then soak it in 8% phosphate solution for 5 minutes, wash it with water, and apply an appropriate amount of sodium soap ;

[0032] (4) Forming: put the pickled wire in the wire drawing machine to draw it to the required diameter, and cold heading;

[0033] (5) Grinding: Fix one tooth plate, and the other movable tooth plate drives the product to move, and forms the required thread by extrusion;

[0034] (6) Heat treatment: Put the rolled screw in a furnace at 200°C for 120 minutes, then raise the temperat...

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PUM

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Abstract

The invention discloses a manufacturing process of a screw. The process comprises the following steps of (1) preparation of wires: using a stainless steel wire; (2) annealing; (3) acid pickling: putting the annealed wires in a hydrochloric acid solution with concentration of 20-25% to soak, cleaning by clean water, putting into a phosphate solution with concentration of 5-8% to soak, cleaning by clean water, and applying a proper amount of lubricating agent; (4) shaping: putting the acid pickled wires in a wire drawing machine, drawing to the required diameter, and performing cold upsetting for shaping; (5) thread grinding: fixing a thread plate, enabling a movable thread plate to drive the product to move, and forming the required threads by extrusion; (6) heat treatment. The manufacturing process has the advantages that the process is simple, a crystallizing structure is adjusted by annealing, the hardness is decreased, the processing property of the wire is improved, an oxidation film on the surface of the wire is removed by acid pickling, and the hardness of the screw is improved by heat treatment.

Description

technical field [0001] The invention relates to a manufacturing process of screws, which belongs to the technical field of standard parts processing. Background technique [0002] Screws are an indispensable industrial necessity in daily life: miniature screws are used in cameras, glasses, clocks, electronics, etc.; general screws for TVs, electrical products, musical instruments, furniture, etc.; Caps; transportation equipment, airplanes, trams, automobiles, etc. are used with both large and small screws. Screws play an important role in industry. As long as there is industry on the earth, the function of screws will always be important. [0003] The current screw strength is often difficult to guarantee. Sometimes unsafe phenomena such as U-turn and rod breakage occur during use, which is very harmful to industrial production. Therefore, it is necessary to provide a high-strength, high-quality screw manufacturing process. Contents of the invention [0004] The purpose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00F16B35/00
Inventor 金国洪
Owner 无锡市第二标准件制造有限公司