High-precision double-hardness cotton spinning ring and preparing method and device thereof

Abstract

The present invention provides a high-precision double-hardness cotton spinning ring and a manufacturing method and a device thereof. The high-carbon alloy steel is sequentially processed to ring blanks through baiting processing. The ring blanks are processed to ring substrates through rough turning and finish turning. Then heating, quenching and tempering are executed. Finally polishing is executed for obtaining the ring of which the hardness of upper part of ring is different from the hardness of lower part of ring. A heating induction furnace is adopted for executing rotation heating to the upper part of ring substrate requiring heating. A home-made quenching machine which comprises a heating device, a quenching device, a pushing mechanism and a control circuit is adopted for quenching the ring substrate, and the quenching time is not shorter than 1 second. Not only can the precision of cotton spinning ring be remarkably increased, but also the high-hardness wearing resistant lubrication requirement on the surface of cotton spinning ring is satisfied. The manufacturing method has the advantages of simple technique, easy operation, remarkably reduced manufacturing cost and prolonged service lifetime of cotton spinning ring.

Description

technical field [0001] The invention relates to a steel ring and its manufacturing method and equipment, in particular to a high-precision dual-hardness cotton spinning steel ring used on a ring spinning machine in the cotton spinning industry and its preparation method and equipment. Background technique [0002] The steel ring is the key component of the ring spinning frame and ordinary ring spinning machine. It cooperates with the traveler, spindle, bobbin, etc. to complete the twisting and winding of the yarn. The quality of the steel ring directly affects the spinning quality, spinning efficiency and economic benefits. The quality of the steel ring is not high, the spinning tension is unstable, the hairiness of the spun yarn increases, the spun yarn evenness deteriorates, and the spun yarn breakage increases, and the production efficiency decreases. How to manufacture high-quality steel rings is a technical problem that those skilled in the art need to study and solve....

AI Technical Summary

Problems solved by technology

However, in the heating step, a batch of processed steel ring substrates are usually heated at the same time. In order to ensure that each steel ring is fully heated and the heating temperature reaches above 830°C, the required heating time is long, the power consumption is large, and Steel rings are easily deformed in a long-term high-temperature heating environment. The roundness of individual rings produced by the same batch varies greatly, and it often occurs that the individual roundness of some steel rings cannot reach the standard of 10 microns stipulated by the state. Low, high scrap rate

In the step of quenching, the placement of the same batch of steel rings will affect the cooling speed and cooling degree of the steel rings. The cooling speed of the steel rings in the middle is slower than that of the steel rings in the side, which delays the cooling of the steel rings in the middle. The quenching time of the collar destroys the transformation of austenite to martensite, resulting in different quenching hardness of high carbon alloy steel collars produced in the same batch, and the steel collars with slower cooling time have low hardness, poor wear resistance and short service life. , the consistency of steel rings in the same batch is poor, and the qualified rate is low

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