Machining process of rhombic-surface tooth-shaped blade root shroud-free moving blade for steam turbine

Abstract

The invention relates to a machining process of a rhombic-surface tooth-shaped blade root shroud-free moving blade for a steam turbine. The machining process is characterized by comprising the following specific machining steps of S1, blanking; S2, taking out a hexagon; S3, milling; and S4, cutting a process clamping end face. According to the machining process of the rhombic-surface tooth-shapedblade root shroud-free moving blade for the steam turbine provided by the invention, a center hole is drilled first and then positioning holes are drilled symmetrically, so that a clamping step on a process clamping head is machined conveniently, the subsequent clamping standard on a machining center is guaranteed, the machining precision is improved, the problem that positioning and clamping arenot easy due to the fact that no positioning standard exists is solved, subsequent machining is detected by the assistance of a blade root ring gauge, and machining qualification is guaranteed; and single-head pliers can be positioned and clamped in the center, so that the positioning standard is guaranteed, the machining precision is improved, and the machining efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of processing a bladeless crown moving blade of a steam turbine, in particular to a processing technology for a rhombic surface toothed blade root bladeless crown moving blade for a steam turbine. Background technique [0002] In the past, because steam turbines use rhombic-shaped tooth-shaped blade roots without blade crowns, the blade roots of the blades are sawtooth-shaped on the rhombic surface, and the small shoulders of each tooth are arc-shaped and symmetrical to the center of the blade. There is no positioning on the outside of this blade. It is extremely difficult to design the processing tooling, and at the same time, the sawtooth-shaped slope on the rhombus surface of the processed blade root cannot be measured with a meter, so it is difficult to judge whether the processing size is correct or not; [0003] The machining of this type of moving blade requires the measurement of the ring gauge. Sinc...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rhombic surface toothed root blade crownless moving blade processing technology for steam turbines, which solves the positioning reference problem during processing and the qualified judgment problem of the sawtooth-shaped inclined surface on the rhombus surface of the blade root.

Images