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Steel wire connecting method

A connection method and steel wire technology, applied in the direction of welding equipment, resistance welding equipment, furnace types, etc., can solve the problems of operators' personal safety threats, affecting production efficiency, and decreased toughness of welded parts, so as to facilitate the analysis of fracture causes of welded parts, The effects of standardization of welding operation and improvement of production efficiency

Inactive Publication Date: 2013-01-16
天津市新天钢中兴盛达有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the influence of welding high temperature during welding of high carbon steel wire rod, carbides are easy to accumulate and grow at the grain boundary, and the grain grows fast, which reduces the strength of the joint
At the same time, the thermal conductivity of high-carbon steel is worse than that of low-carbon steel, so rapid cooling in the molten pool and the affected area is likely to produce brittle structures, resulting in a decrease in the toughness of the weld
Due to the reduction of the strength and toughness of the welding point, and the large amount of deformation during the drawing process of the steel wire, it is easy to break the wire during the multi-pass high-speed drawing process at the welding point, which not only affects the production efficiency, but also affects the personal life of the operator. Security also poses a certain threat

Method used

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  • Steel wire connecting method

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The wire rod is φ12.5mm82B wire rod.

[0022] (1) Straightening: Straighten the heads of the two wire rods respectively, remove the burrs at the cutting heads with a grinding wheel, and perform 45° chamfering treatment with a length of 2mm.

[0023] (2) Grinding head: Grinding the end of the wire rod, after grinding the head, use sandpaper to clean the impurities around the end of the wire rod.

[0024] (3) Butt welding: respectively clamp the wire rod processed in step (2) to the welding position of the welding machine and use resistance butt welding for welding. The wire rod at both ends should be kept horizontal. If the clamping mechanism is found to be loose, it should be adjusted in time . The welding temperature of the steel wire is 1080-1270°C, the upsetting time is 3-8s, the width of the weld is 1-3mm, the height of the weld is 2-3mm, and there are uniform cracks around it. Cool naturally to 30-40°C at ambient temperature. After the welding is completed, grin...

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PUM

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Abstract

The invention discloses a steel wire connecting method, and provides a steel wire connecting method capable of preventing end breakage of a welding position during a drawing process, and reducing end breakage rate. The method comprises the following steps of: clamping a polished welding seam at a tempering jaw, and raising the temperature intermittently for 4-5 times, with 1-2 seconds of interval between every two temperature rises, and stopping temperature rise when reaching 750-820 DEG C; continuously raising the temperature to 750-820 DEG C when naturally cooling to the temperature of 650 DEG C in the air, stopping temperature rise, repeating the above cooling-raising temperature process for three to four times, and then naturally cooling to 650 DEG C in the air; then continuously raising the temperature to 750-820 DEG C, and keeping the temperature for 1 minute through intermittent heating; and after naturally cooling to 570-590 DEG C, instantly electrifying and raising the temperature by 20-50 DEG C, and naturally cooling. The steel wire connecting method provided by the invention has the beneficial effects that through high temperature tempering processing at the weld part, the internal stress generated in welding is reduced, the tenacity of the welding part is improved, the phenomenon of end breakage at the welding position in the drawing process is prevented, and the end breakage rate is lowered.

Description

technical field [0001] The invention relates to a steel wire production process, in particular to a steel wire connection method. Background technique [0002] In the wire drawing production process, the welding of the head of the raw material wire rod is carried out in order to realize continuous production. The welded area generally undergoes nine high-speed drawing passes, and the total compression rate is usually around 80%. [0003] Due to the influence of high welding temperature during welding, carbides are easy to accumulate and grow in the grain boundary of high carbon steel wire rod, and the grain grows fast, which reduces the strength of the joint. At the same time, the thermal conductivity of high-carbon steel is worse than that of low-carbon steel, so rapid cooling in the molten pool and the affected area is likely to produce brittle structures, resulting in a decrease in the toughness of the weld. Due to the reduction of the strength and toughness of the weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/04B23K11/34B21F15/08C21D1/18C21D9/50
Inventor 毛爱菊王文喜王鸿利张鹏潘捷刘海忠蔺秀艳王莉陈海祥
Owner 天津市新天钢中兴盛达有限公司
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