Turbine disc tongue-and-groove forming grinding machining device and use method thereof

Abstract

The invention relates to a turbine disc tongue-and-groove forming grinding machining device and a use method thereof. A transmission device of the device enables a stepping motor for a turbine disc to be connected with the turbine disc, the turbine disc is fixed to a turbine disc clamp, an annular grinding wheel is used for forming grinding, the superhard abrasive grain grinding wheel is adopted,and is arranged on a machine tool spindle, direction converters and rocking wheels for controlling the turbine disc to axially and radially rotate are mounted on the free end and the fixed end of a horizontal supporting rod of the turbine disc clamp, the rocking wheels are driven by rocking wheel handles to rotate, after passing through the direction converters, the turbine disc is driven to do axial and radial rotation, during grinding, the annular grinding wheel does high-speed rotation in the vs direction, through the numerical control program, transverse feeding of the turbine disc and the grinding depth of the grinding wheel are controlled, then, in the feeding direction vw, the material is removed, through reciprocated grinding, grinding of one side of the turbine disc tongue-and-groove is finished, the turbine disc inverts by 180 degrees, and grinding of the other side of the turbine disc tongue-and-groove is finished. The traditional broaching machining or milling manner is changed into grinding forming machining of a large-size grinding wheel, and machining efficiency and precision of the turbine disc tongue-and-groove can be improved.

Description

Technical field: [0001] The invention relates to processing equipment and a grinding method for forming and grinding tenon and groove of a powder metallurgy superalloy turbine disc. Background technique: [0002] The machining technology of the tenon and groove of the turbine disk is one of the key technologies in the manufacture of aero-engines. Due to the characteristics of difficult-to-machine materials, high dimensional accuracy, and complex tooth shapes, the tenon and groove are mainly formed by broaching and milling. With the improvement of the performance of the new generation of aero-engines, powder metallurgy superalloys are widely used in the manufacture of turbine disks, and the processing of the tenon and groove has become more difficult. The main disadvantages of broaching are: after aging treatment, powder metallurgy high temperature The processing performance of the alloy is extremely poor, resulting in large broach loss and high processing costs. In the bro...

AI Technical Summary

Problems solved by technology

With the improvement of the performance of the new generation of aero-engines, powder metallurgy superalloys are widely used in the manufacture of turbine disks, and the processing of the tenons and grooves has become more difficult. The main disadvantages of broaching are: after aging treatment, powder metallurgy high temperature The processing performance of the alloy is extremely poor, resulting in large broach loss and high processing costs

[0006] Through literature search and actual investigation, it is found that the machining of turbine disk tenon and groove currently has the following problems: ① The existing main processing methods of turbine disk tenon and groove (broaching, milling, etc.) have low efficiency, short tool life, The problem of poor precision; ②Current grinding methods (surface grinding, cylindrical grinding and internal grinding, etc.) cannot realize the grinding of the turbine disk tenon and groove, that is, the turbine disk tenon and groove has not been designed yet Special grinding wheels and special equipment for profile grinding; ③The currently proposed tenon and groove processing method lacks an efficient and high-precision profile grinding process for the tenon and groove of turbine discs

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