Technology for improving mesh accuracy between screwdown nut and screwdown screw of strip steel rough mill and plate mill

Abstract

The invention discloses technique to improve the engagement accuracy of housing screw and nut of hoop rolling mill roughing mill and plate mill and particular fit to prepare screw and nut for multi-start screw thread of heavy mill. The invention needs equipment with simple structure, low cost, easy to operate and with perfect effect. The product (B520x48 P=24) with two pieces of screw thread 100% contact and Ra0.8 of surface roughness, and achieves international first-class standard.

Description

technical field [0001] The invention relates to a manufacturing method specially suitable for key parts of a metal rolling mill, and belongs to a process method for improving the meshing precision and service life of a depressing nut and a depressing screw rod of a strip steel roughing mill and a plate mill. Background technique [0002] In the roughing mill of the strip rolling line and the pressing device of the medium and heavy plate mill, the pressing nut and the pressing screw are a pair of very important parts, which are required to complete every adjustment of the roll gap of the rolling mill. Thousands of tons of rolling force are also transmitted to the frame through them. Once the nuts and screw rods are pressed down and there are quality problems, the entire rolling line will be shut down. Major domestic steel mills have had similar painful experiences. The shutdown of rolling mills means the occurrence of major accidents, and the steel mills and even the country ...

AI Technical Summary

Problems solved by technology

[0003] Improve the contact accuracy of the pressed nut and the pressed screw, ensure that each thread can be fully contacted, reduce the contact stress, ensure the reliability of its work, and prolong the service life. This is the goal that manufacturers and users have been pursuing for a long time. But no successful reports have been seen so far, and the method we designed is simple, easy to implement and low in cost, and has successfully solved the long-standing problem of low contact accuracy between the pressed nut and the pressed screw.

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