A Center Hole Datum Correction Method for Reducing Cutting Torque

Abstract

The invention relate to a center hole benchmark correcting method reducing cutting torque. The center hole benchmark correcting method includes the following steps that a center hole benchmark correcting process of a journal type typical blade part machining technology is selected; equipment for machining in the center hole benchmark correcting process is selected; the positioning benchmark of a clamp and the equipment is selected, and the positioning benchmark of the clamp and a part is selected; a center hole benchmark correcting tool for reducing cutting torque is designed; the coaxiality tolerance actual values of the benchmark of a center hole are detected before heat treatment and semifinishing in a journal type blade in the machining process, and an average value is calculated; the center hole benchmark correcting tool is used for machining and correcting the center hole of the part, and whether the coaxiality tolerance value of the journal of the part subjected to external grinding conforms to the tolerance or not is judged; machining parameters are set; and the differences of the coaxiality tolerance actual values of the benchmark of the center hole of the part are compared. According to the center hole benchmark correcting method reducing cutting torque, the qualification rate of the machining process with the center hole of the journal type blade as the benchmark is increased, waste products caused by profile deformation when the coaxiality of the center hole is not qualified are reduced, the machining efficiency is improved to be more than 200%, and the qualification rate is more than 90%.

Description

technical field [0001] The invention relates to a center hole datum correction technology for journal blades, in particular to a center hole datum correction method for reducing cutting torque. Background technique [0002] Due to the complex shape and surface structure of the aero-engine parts, the shaft journal and blade parts are easily deformed due to uneven stress caused by heat treatment and processing. . After the heat treatment process or after semi-finishing, the blade is deformed due to the release of residual stress. The central holes at both ends of the part are deformed after rough machining. According to statistics, the coaxiality of the outer circles of both ends of the blades processed by the original quick-reaction center is 50% out of tolerance, while the outer circles of both ends of the blades processed by the outer grinding machine of the blade factory are 70% qualified. The rate does not meet the process requirements. [0003] Some journal blade part...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art that the existing method of positioning and trimming the center hole is not suitable for journal blades that are not easy to clamp and locate, and the method of repairing the center hole with abrasive powder and abrasive paste is not suitable for blade parts that are resistant to high temperature and titanium alloy materials, etc., this paper The technical problem to be solved by the invention is to provide a center hole reference correction method with reduced cutting torque that can improve the pass rate of the journal blade with the center hole as the reference machining process

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