Machining method of superheavy long shaft

Abstract

The invention discloses a machining method of a superheavy long shaft. The superheavy long shaft is divided into supporting sections at the two ends and a tubular main body section in the middle, thesupporting sections and the main body section are welded into an integrated billet shaft, and a supporting block is arranged in an inner hole of the main body section; the billet shaft is supported ontwo brackets, and the brackets are adjusted to change the height and horizontal position of the axis of the billet shaft, so that the supporting section at the front end is clamped on a chuck, and arear center ejector pin is positioned in a center hole of the supporting section at the rear end; a tool holder is moved to the position corresponding to the supporting block, and the billet shaft isroughly turned to form a reference section; the bracket at the back end is moved and supported on the outer circle of the reference section, and then the outer circle of the billet shaft is turned forwards from the reference section to the rough turning diameter; the bracket at the front end is supported on the reference section, and then the outer circle of the billet shaft is turned rearwards from the reference section to the rough turning diameter; and the outer circle of the rear-section billet shaft and the outer circle of the front-section billet shaft are finely turned to the design diameter. Through the machining method of the superheavy long shaft, the coaxiality of the shaft and the precision of turning machining can be significantly improved, and the machining efficiency is improved advantageously.

Description

technical field [0001] The invention relates to the technical field of turning processing, in particular to a processing method for an overweight long shaft. Background technique [0002] In the thermal power generation industry, it needs to use super heavy and long shafts. Due to the large diameter, long length and heavy weight of such shafts, it is more difficult to turn them. For example, the length of the rotating shaft in large power generation equipment will be about 10 meters, the maximum diameter will exceed 0.7 meters, and the working temperature will be between 360 degrees and 550 degrees. Therefore, people usually use 316 stainless steel to manufacture such shafts. Although 316 stainless steel has the advantages of corrosion resistance, high temperature resistance, and extremely high temperature strength, its cutting performance is poor, which makes cutting difficult, and the processing of the shaft after processing is difficult. Accuracy is not easy to guarantee...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low processing accuracy of the existing super-heavy long shaft during turning, and to provide a processing method for super-heavy long shaft, which can significantly improve the coaxiality of the shaft and the precision of turning , and is conducive to improving the processing efficiency

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