A kind of production method of stainless steel round link chain

Abstract

The invention discloses a production method for a stainless steel round-link chain. The production method mainly comprises the following steps: selecting raw materials; blanking; performing hot chain weaving; performing shot blasting; performing flash butt welding; stretching and correcting; pickling; inspecting. The production method adopts a high-efficiency, automatic and assembling-line mode; the welding performance and the size precision of a product are ensured by a flash butt welding sequence, so that the appearance error of the product is small, and the product quality is ensured; after pickling treatment is adopted, so that stainless steel large-diameter round-link chain products of Phi 20X100, Phi 26X100 and Phi 30X120 are excellent in corrosion performance; the production method is more suitable for conveying work of high-corrosion chemical solution, such as hydrochloric acid.

Description

technical field [0001] The invention relates to a production method of a chain, in particular to a production method of a large-diameter stainless steel round link chain. Background technique [0002] The circular link chain is a key vulnerable part of all kinds of mechanical equipment, which requires a large amount and high technical requirements. With the globalization of industrial production and the rapid development of informatization, industrial production safety and production automation are getting more and more attention and popularization. The demand for individualization of the circular link chain is gradually increasing, and the variety of products is becoming more and more diverse. At the same time, the market demand is changing rapidly, which promotes the extension of chain transmission products from standard to non-standard, and to multi-specification, new series, and all-round expansion. New products of industrial chains Develop the new features of "three hig...

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Problems solved by technology

[0003] With the rapid development of my country's coal industry, the continuous improvement of mining and transportation machinery, and the continuous improvement of the degree of mechanization have put forward higher requirements for the quality and variety of round link chains. Large-diameter stainless steel round link chains are resistant to high temperatures, strong acids, and reliable in quality. At the same time, it is suitable for use in the food industry, places susceptible to corrosion by chemicals and drugs, and high-temperature places. However, the stainless steel chains on the market are mainly small-diameter chains, and stainless steel large-diameter round link chains with a diameter of more than 20 are currently not available in the domestic market.

[0004] At the same time, there are generally some quality problems in our country's stainless steel round link chain products: the link weld joints are prone to cracking and the size and pitch are unstable.

At present, there are mainly three methods of chain knitting and welding in China: manual chain knitting and cold welding process; because cold knitting chains have internal stress to overcome cold bending deformation, in the welding process, the accuracy of processing equipment, Influenced by the rigidity of the fixture, coupled with the certain resilience of the link, it is easy to produce defects such as loose weld joint structure, resulting in unstable weld joint quality

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