Four-axis linkage milling machine processing method for steam turbine blade

Abstract

The invention relates to a four-axis linkage milling machine processing method for a steam turbine blade. The steam turbine blade structurally comprises four parts: an inner arc, a back arc, a steam outlet edge and a steam inlet edge. The four-axis linkage milling machine processing method for the steam turbine blade comprises the processing steps of clamping a blank onto a pair of flat tongs of acommon milling machine, and utilizing an end mill clamped on a port of the common milling machine for processing a blade root end surface and a blade crown end surface through a rough milling processand a finish milling process; clamping the processed blank onto a three-tip fixture on a four-axis milling machine, adopting a ball-end cutter arranged on a port of the four-axis milling machine forsegmentally processing the blade root end surface, a middle boss and the blade crown end surface, cushioning a cushion block to the bottom part of the blade root end surface, and meanwhile, using a molded line sample plate, a back radial position sample plate, an inner radial position sample plate, a blade crown inner radial direction and a steam inlet side sample plate for measuring; and clampinga semi-finished blade onto a polishing machine for polishing, clamping a polished semi-finished product onto a milling total length fixture of the common milling machine, and scribing and cutting theblade crown inner back radial direction. The processing cost is reduced, the processing period is shortened, and the product quality is improved.

Description

technical field [0001] The invention relates to a steam turbine blade, in particular to a four-axis linkage milling machine processing method for a steam turbine blade. Background technique [0002] With the rapid growth of my country's economic development, the competition in the power generation equipment manufacturing market is becoming increasingly fierce. In order to improve product quality, various units have poured a lot of money, materials and manpower into technological transformation. Due to the development of modern turbines towards high load, high frequency and high power design, the use of curved and twisted blades is one of the most effective measures to reduce heat consumption and improve unit efficiency. [0003] Steam turbine blades are the heart of a steam turbine, and the manufacturing technology and quality of the blades directly affect the operating performance and reliability of the unit. The blade is a relatively complex curved surface body part. The ...

AI Technical Summary

Problems solved by technology

The blade is a relatively complex curved surface body part. The production efficiency of electrolysis, profiling, triple linkage and other manufacturing processes has been used for a long time, and its production efficiency is very low. It cannot meet the requirements of technological progress, nor can it effectively guarantee the accuracy of blade profile and manufacturing quality, let alone meet the requirements of today's steam turbine market competition

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