High-speed large-cutting-depth grinding method for mounting end face of high-pressure turbine disc

Abstract

The invention discloses a high-speed large-cutting-depth grinding method for a mounting end face of a high-pressure turbine disc. The high-speed large-cutting-depth grinding method combines a whole set of process method adopting a novel WA / SA microcrystalline corundum material grinding wheel, a cut-in grinding mode and applicable efficient grinding process parameters for the first time, high-speedand large-cutting-depth grinding is carried out on the mounting end face of the high-pressure turbine disc made of the high-temperature alloy material difficult to machine, and the efficient grindingprocess parameters are as follows: the grinding wheel linear speed Vs is equal to 45 to 60m / s, the workpiece feeding speed Vw is equal to 300 to 400mm / min, and the single cutting depth ais less than or equal to 0.2 mm. According to the high-speed large-cutting-depth grinding method for the mounting end face of the high-pressure turbine disc, the grinding efficiency and the grinding surface quality can be improved and optimized at the same time when high-speed and large-cutting-depth grinding is carried out on the mounting end face of the high-pressure turbine disc made of the high-temperature alloy material difficult to machine.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a high-efficiency and high-quality grinding process for grinding the installation end face of a high-pressure turbine disk of a high-temperature alloy material that is difficult to process at high speed and with a large cutting depth. Background technique [0002] The high-pressure turbine disc (abbreviation: high scroll) of an aero-engine is the core key part of the high-pressure turbine part. It bears a large centrifugal load during work and is in a high-temperature environment. Therefore, the high-pressure scroll material is often selected for anti-oxidation and corrosion resistance. High temperature alloy with good properties. In the prior art, the installation end face of the high-temperature alloy material high scroll is processed by using ordinary corundum material grinding wheel and conventional grinding process parameters, which has the problems of low li...

AI Technical Summary

Problems solved by technology

In the prior art, the installation end face of the high-temperature alloy high-speed scroll is processed by using ordinary corundum material grinding wheels and conventional grinding process parameters. There are problems such as low linear speed of the grinding wheel and small depth of single cut, resulting in low grinding efficiency.

Its conventional grinding process parameters are grinding wheel linear speed Vs=20~30m / s, workpiece feed speed Vw=60~120mm / min, single cutting depth a p ≤0.08mm, the maximum material removal rate can be obtained is 9.6mm 3 / mm·s, the grinding surface roughness Ra=0.7~0.8μm, and the flatness is 4~5μm; in addition, when the ordinary corundum material grinding wheel is used for grinding at high speed and large depth of cut, there are burns, burns, and The grinding wheel is severely worn and the quality of the grinding surface is difficult to control.

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