Forming method for semi-closed complex deep inner cavity of sealing disc

Abstract

The invention provides a forming method for a semi-closed complex deep inner cavity of a sealing disc cantilever mounting edge. The forming method comprises the following steps that firstly, a to-be-machined part of a part is divided into five cutting areas, and cutters with structures corresponding to the cutting areas are selected, wherein the to-be-machined part of the part is the semi-closed complex deep inner cavity of the large arc cantilever mounting edge of the sealing disc; secondly, working procedures and cutting areas corresponding to the working procedures are formulated; and thirdly, a low-stress cutting path is planned, and cutting parameters are formulated. According to the forming method, the surface roughness of the part machined through the forming method reaches Ra1.6 microns-Ra2.3 microns, the surface appearance is good, meanwhile, the stress value of the part ranges from-45 Mpa to-82 Mpa, the stress is pressure stress, and the anti-fatigue service life of the part can be prolonged; and the deformation of the matching surface and the mounting surface of the part is controlled between -0.03 mm and +0.05 mm, and the deformation range from -0.05 mm to +0.1 mm allowed by the design is met.

Description

technical field [0001] The invention belongs to the field of mechanical processing, in particular to a sealing plate prepared from a powder superalloy FGH99 material, and relates to a forming method of a semi-closed complex deep inner cavity of the sealing plate. Background technique [0002] A new generation of domestic powder superalloy FGH99 was used for the first time as the material of a certain sealing plate. This material has a low machinability coefficient. Under the cutting conditions of the same specification and parameters, the cutting deformation of this powder superalloy is larger than that of ordinary superalloys (such as GH4169). . In terms of structure, compared with the previous models, the sealing plate has a semi-closed deep inner cavity structure formed by a large arc cantilever mounting edge and the sealing plate body at the front end. Due to the deep inner cavity and the structure Complexity and weak overall rigidity make it difficult to plan low-stres...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a sealing plate cantilever installation side semi-closed complex deep inner cavity forming method, which solves the existing processing method of the cantilever installation side semi-closed complex deep cavity of the sealing plate made of powder superalloy FGH99 material The existing machine stress is large, the processing deformation is large, and the problem of large machine chatter occurs; therefore, the present invention provides a method for high temperature processing of difficult-to-process powders on the basis of low machine stress and small processing deformation. Forming and processing method of semi-closed complex deep inner cavity of alloy material sealing disc with large arc cantilever installation side

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