Processing method of rolling mill archway

Abstract

The invention discloses a processing method of a milling housing. A first plum blossom hole is formed in the housing and formed through cutting machining and abrasive machining on a housing substrate. The processing method is characterized in that during the cutting, the empirical formula of a cutting speed is as follows: V=3.14*D*n*eta<2> / 1000, wherein V represents the cutting speed with a unit of m / min; n represents the revolving speed of a machine tool spindle with a unit of rpm; D represents a cutting radius ranging from 260mm to 360mm; eta<2> is a coefficient ranging from 0.05 to 0.08; the smaller the difference between the size of the plum blossom hole and a design value is, the larger the value of the plum blossom hole is; and otherwise, the value of the plum blossom hole is smaller. By means of the processing method of the mill housing, the mill housing which meets the accuracy requirement can be processed. According to the processing method, the dimensional tolerance of diagonal plum blossom holes of the mill housing are smaller than or equal to 0.01mm, the total tolerance is smaller than or equal to 0.02mm, and the straightness of each hole is smaller than or equal to 0.01mm. With the adoption of the method for processing the housing, under the condition that smooth and efficient processing is guaranteed, the housing substrate cannot be scrapped, and the scrappage rate is zero under the condition that the processing efficiency is improved by over 20%.

Description

technical field [0001] The invention relates to a processing method for a rolling mill archway. Background technique [0002] The rolling mill arch is the basic component of the 20-high rolling mill, and its dimensional accuracy is very high. There are plum blossom holes in the rolling mill archway. The edges of the plum blossom holes are distributed like plum blossom petals, hence the name plum blossom holes. In order to realize the high-precision requirements of the rolling mill, the dimensional accuracy of the plum blossom hole is very high. A qualified rolling mill archway must ensure that the dimensional tolerance of each diagonal plum blossom hole is ≤0.01mm, and the total tolerance is ≤0.02mm. [0003] The processing method of the rolling mill archway in the prior art includes two steps of cutting processing and grinding processing. Cutting is to use a turning tool to carve plum blossom holes on the base of the archway. Grinding is to grind the plum blossom hole ...

AI Technical Summary

Problems solved by technology

[0004] However, in the processing method in the prior art, due to the need to process on the base of the metal archway, and the length and size of the plum blossom hole is long, and the precision requirements are high, it is impossible to directly process the plum blossom hole that meets the requirements through a direct boring machine in the cutting process stage.

In the process of continuous tool feeding and tool changing, the machining size cannot be completely in accordance with the accuracy requirements

If the size of the plum blossom hole after cutting is too small, it will take a lot of time in the grinding process; if the size of the plum blossom hole after cutting is too large, it will cause the arch base to be scrapped

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