Clamping and machining method for outer arc surface of outer ring of silicon carbide turbine

Abstract

The invention provides a clamping and machining method for an outer circular arc surface of an outer ring of a silicon carbide turbine, which is used for clamping and machining thin-wall arc-shaped pieces and T-shaped beam / composite beam structures, a curved surface shape follow-up tool is integrally designed into a shape follow-up curved surface supporting part, and a long-strip-shaped clearance groove suspending part is designed below the side edge of a step, so that the part can be prevented from being not clamped in place. The turbine outer ring is clamped on five-axis high-speed precision machining equipment through the curved surface shape follow-up tool, and all hole faces can be machined through one-time clamping. According to the technical scheme, the contact area of the part and the tool can be increased, part deformation in the clamping and machining process is reduced, the clamping frequency is reduced, and the face milling and punching work efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of product molding and processing, in particular to a method for clamping and processing the outer arc surface of a silicon carbide turbine outer ring. Background technique [0002] The outer ring of the turbine is a stationary hot-end part of the aero-engine, made of SiCf / SiC ceramic matrix composite material, with a wall thickness δ<3mm, and multiple deep small holes evenly distributed at the bottom of the U-shaped groove on both sides. [0003] The outer ring of the turbine is a thin-walled curved part and a T-beam / composite beam structure. The part is easily clamped and deformed under the action of external force, and the deformation is difficult to control. Factors such as cutting heat and vibration during the machining process cause the part to deform and the machining accuracy is difficult. loss. When machining the various curved surfaces, front, rear, left, and right end faces and tiny holes of t...

AI Technical Summary

Problems solved by technology

[0003] The outer ring of the turbine is a thin-walled curved part and a T-beam / composite beam structure. The part is easily clamped and deformed under the action of external force, and the deformation is difficult to control. Factors such as cutting heat and vibration during the machining process cause the part to deform and the machining accuracy is difficult. loss

When machining the various curved surfaces, front, rear, left, and right end faces and tiny holes of the turbine outer ring, multiple clamping is required, and there are problems such as many times of clamping and alignment, long time and great difficulty

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