Valve tri-eccentric seal surface milling processing special numerical control combination machine

Abstract

The invention discloses a special digital combined machine tool in tri-eccentric sealing surface milling a valve; two independent turning worktables can process two workpieces of a butterfly plate and a valve body simultaneously; two milling driving heads are arranged on a base with the same inclination through each own upright column, ensuring the conformability on conicity and accuracy of the workpiece sealing surface of the butterfly plate and the valve body. Because the configuration of the main shaft servo motor realizes high-speed heavy cut and the two axis coupled digital feed control system realizes high intensity continuous milling for inclined cut cone surface at three dimensional direction with automatic precision feeding, the machine tool has simple structure, excellent performance, convenient adjustment and maintenance. Comparing with the common machine tool of the traditional technique, this machine tool not only improves the dimensional processing precision and production efficiency; but also greatly reduces the production cost.

Description

technical field [0001] The invention relates to a metal cutting machine tool, in particular to the technical field of milling machine tools, specifically to a special numerical control combination machine tool for milling of three eccentric sealing surfaces of valves. Background technique [0002] Valves are important general accessories on modern industrial pipelines. Butterfly valves are one of the 12 major types of industrial valves, especially in medium and low pressure industrial pipelines with large quantities and wide areas. Since the early 1990s, The triple eccentric cone metal hard seal butterfly valve, which was invented in Germany, has gradually spread to various countries. The triple eccentric cone metal hard seal butterfly valve has gradually replaced various old-fashioned seal butterfly valves due to its simple structure and reliable sealing. However, in the past 30 years, the production and processing technology of this valve has been produced using traditiona...

AI Technical Summary

Problems solved by technology

However, in the past 30 years, the production and processing technology of this valve has been produced using traditional processing methods. The processing of various butterfly valve sealing surfaces is generally carried out on ordinary horizontal lathes or vertical lathes and leaves a certain amount of time. Grinding the allowance, and then installing a special grinding head on the tool holder of the lathe for grinding. It not only has high work efficiency and low cost, but also the machining accuracy is not easy to guarantee, especially the accuracy of the taper fit.

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