A crawler follow-up mechanism for quenching and leveling process of steel thin material

Abstract

The invention discloses a crawler follower mechanism for a thin steel material quenching and leveling process. The crawler follower mechanism comprises chain-plate crawler units, an oil tank assembly and a motor transmission system, wherein the chain-plate crawler units are arranged surrounding tank bodies, each chain-plate crawler unit comprises chain wheels, a chain wheel shaft and a closed-ring crawler which is formed through connecting a plurality of chain-plate assemblies in series, and thus, the closed-ring crawlers cyclically revolve around the face of an oil tank under the drive of the chain wheels; each chain-plate assembly comprises a chain plate, chain plate pin shafts, rollers, embedded shafts and rolling bearings; the motor transmission system is connected with the chain wheel shafts and is used for transferring motor power, so that the closed-ring crawlers are driven to cyclically revolve, and meanwhile, relative-sliding-free follow-up with a quenched thin material is realized. Through the crawler follower mechanism, the phenomena that folds appear after the thin material is quenched, the thin material is stuck due to the fact that the rolling bearings are burnt out due to too high temperature of the thin material, and the like can be effectively avoided; meanwhile, the surface quality of the quenched thin material is remarkably improved, and the leveling efficiency of the quenched thin material is remarkably increased.

Description

technical field [0001] The invention belongs to the technical field of steel processing equipment, and more specifically relates to a crawler follower mechanism used in the quenching and leveling process of thin steel materials, which can improve the mechanical properties of the processed object during the quenching process and prevent creases from appearing on the surface . Background technique [0002] In the thin steel industry, strip steel is taken as an example. It is a narrow and long steel plate produced by various steel rolling enterprises to meet the needs of industrial production of various metal or mechanical products in different fields. Strip or sheet steel is widely used in many industries due to its clean and flat surface, high dimensional accuracy and good mechanical properties. In addition, the narrow-strip steel rolling mill has less investment and a short construction period, so many domestic enterprises continue to put into production strip production li...

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Problems solved by technology

[0004] However, further studies have shown that since the quenching process requires the strip steel to be cooled rapidly near 500°C to 600°C at a rate greater than the critical quenching rate, and to be cooled slowly near 200°C to 300°C, in this way, during oil spray (water) quenching, Often there will be a temperature difference between the upper and lower surfaces of the strip, the surface and the core, and the thermal stress deformation of the strip will occur.

For the existing types of quenching machines, from the actual production feedback of the factory, there are still many problems as follows: First, although the downforce of the work rolls on the quenching machine can be adjusted to maintain the shape of the quenched strip, due to the quenching temperature Influenced by many factors such as the change of the roll gap during work roll work, it is still difficult to obtain a satisfactory smoothing effect on the surface of the strip steel after quenching; secondly, because the quenching temperature of the strip steel is too high, the high temperature strip steel will burn out and The cage inside the supporting rolling bearing in contact with the upper and lower work rolls makes the supporting rolling bearing stuck and unable to rotate, and the stuck rolling bearing will scratch the surface of the strip steel

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