Clamp for machining annular casing of aero-engine with large length-diameter ratio

Abstract

The invention relates to a clamp for machining an annular casing of an aero-engine with a large length-diameter ratio. The clamp comprises a chassis, wherein a pressing device is arranged at the top end of the chassis and can press and fix an annular plate at the bottom end of the annular casing at the top end of the chassis; an inner supporting assembly is detachably and fixedly connected above the chassis and comprises a plurality of supporting blocks which are arranged in the circumferential direction; the outer side surfaces of the supporting blocks can be pressed and attached to the innerwall of the top of the annular casing; a cover plate is detachably and fixedly connected above the inner supporting assembly; and the bottom surface of the cover plate can be pressed and attached tothe top surface of the annular casing. According to the clamp, the annular casing with the large length-diameter ratio is clamped on a five-axis linkage turning and milling composite machining centerat a time, so that the machining of the inner surface and the outer surface of the annular casing can be completed, the vibration of a workpiece is small in the machining process, and the thin wall ofthe annular casing is not easy to deform.

Description

technical field [0001] The invention relates to a jig for aviation processing, in particular to a jig for processing an aero-engine annular casing with a large length-to-diameter ratio. Background technique [0002] The annular casing with large aspect ratio is a thin-walled precision part on an aero-engine. The dimensional accuracy and shape tolerance of the annular casing with large aspect ratio have high requirements. The common high aspect ratio annular casing Processing method: complete the corresponding processes of the ring casing on the vertical lathe, horizontal lathe and machining center and other equipment. [0003] The above-mentioned processing method has the following disadvantages: more processing steps lead to increased manufacturing costs; during the processing process, the ring casing needs to be clamped on different equipment for processing, and the dimensional accuracy and shape tolerance of the product cannot be easily guaranteed by multiple clamping ; ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to use the fixture of the present invention to clamp the ring machine with large aspect ratio on the five-axis linkage turning and milling compound machining center by using a fixture for processing the annular casing of the aero-engine with large aspect ratio. The inner and outer surface of the ring casing can be processed by using a single casing. The vibration of the workpiece is small during the processing, and the thin wall of the ring casing is not easily deformed.

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