Expansion device and processing method for facing of large-size medium-thickness cylindrical part

Abstract

The invention relates to an expansion device and a processing method for facing of a large-size medium-thickness cylindrical part. The expansion device adopts the technical scheme that the expansion device comprises a base, a guide plate, an expansion block, a guide seat, an expansion jacking head, a conical head, a support plate, a guide column b, a loosening jacking head, a single-action hydraulic oil cylinder, a manual hydraulic cylinder and a high pressure hydraulic oil pipe, wherein the base is formed by welding an upper support plate, a lower support plate and support columns, the support columns are uniformly distributed along the circumference, the guide seat is fixedly arranged on the upper support plate of the base through a bolt, the guide seat is provided with an inner cavity, the guide column b is fixedly arranged on the lower support plate of the base through a bolt, and the guide seat, the guide column b and the base are coaxially arranged. By adopting the technical scheme, the expansion device has the advantages that the problems of large self weight, higher rigidity, and unreliable manual expansion of traditional thread in the large-size medium-thickness cylindrical part are solved; the manufacturing is simple, the time is shortened, the labor is saved, the fund is reduced, the implementation is easy, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of aero-engine machinery manufacturing, in particular to a tensioning device and a processing method for turning end faces of large-sized medium-thick plate cylindrical parts. Background technique [0002] In order to pursue a higher thrust-to-weight ratio and realize engine vector thrust technology, aero-engines use a large number of large-size medium-thick plate chemical milling casings. This type of chemically milled welded casing is usually made of a medium-thick plate into a straight or conical cylinder and then chemically milled to strengthen the ribs. Large-scale medium-thick plate cylindrical parts are used such as figure 1 When turning the end face of the shown process device, because the parts are self-heavy and rigid, they are tightened by screwing in and tightening, and the tightening force is insufficient. Although this kind of structure can increase the expansion force by increasing the threa...

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Problems solved by technology

[0003] The present invention fully analyzes and researches the problem of insufficient expansion force of the traditional screw thread manual expansion fixture, laborious manual operation and is not convenient for actual production, and experimental demonstration, and proposes the use of hydraulic thrust expansion parts for turning processing, and the adjustment nut to limit the cone head Move down the stroke, so as to control the structural form of the diameter of the expansion block when it is tightened, to solve the problem that the large-size medium-thick plate cylindrical part has a large self-heavy, strong rigidity, and the expansion force is insufficient due to screw rotation, which is not convenient for actual production.

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