A joint ball seat turning-milling compound processing and inner spherical surface grinding method

Abstract

A joint ball seat turning milling compound processing and inner spherical surface grinding method, including the following steps: Step 1, parts clamping: install the outer cylinder of the joint ball seat part into the inner hole of the fixture positioning ring, the mounting hole of the joint ball seat part and the Cooperate with the positioning pin of the fixture, adjust the position of the pressure plate, and press it with the compression nut; step 2, the inner spherical surface and the groove milling compound processing: step 3, nitriding treatment: the hardness value of the nitriding layer is HR15N≥88, and the nitriding thickness is 0.2~0.45mm; Step 4, Grinding medium blending: Use 120-grain corundum and 30# engine oil for blending, and ensure that there is no impurity in the grinding medium; Step 5, Grinding the inner spherical surface. By optimizing the positioning datum and clamping method of the inner spherical surface and the groove, and adopting the turning-milling composite processing method, the assembly interference problem between the joint ball seat part and the matching sphere is solved, and the mechanical auxiliary grinding is realized instead of the manual grinding, and the grinding efficiency and qualification are improved. rate, reducing the difficulty and workload of grinding.

Description

technical field [0001] The invention belongs to the technical field of aero-engines, and in particular relates to a turning-milling composite processing of a joint ball seat and a grinding method for an inner spherical surface. Background technique [0002] The material of the joint ball seat is alloy structural steel, the wool is die forging, and the main body of the structure is a revolving body, which is composed of mounting holes, inner spherical surfaces, grooves, outer cylinders and other structures, such as figure 1 shown. The parts are assembled on the intermediate casing, which is the key connecting part and load-bearing part of the engine. The main matching surfaces are the inner spherical surface and the outer cylindrical surface. Rotation, so the dimensional tolerance requirements of the inner spherical surface are relatively high. During processing, the inner spherical surface is usually clamped with a three-jaw chuck on a CNC lathe, and the machining groove is...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a joint ball seat turning-milling compound processing and inner spherical surface grinding method, which solves the assembly interference problem of the joint ball seat and the matching sphere and the inner spherical surface grinding problem, so that the various technical indicators of the joint ball seat meet the design and use requirements , while improving processing efficiency and qualification rate, reducing labor intensity of workers

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