Ball-end milling cutter applicable to machining high-temperature alloy materials

Abstract

The invention relates to a ball-end milling cutter applicable to machining high-temperature alloy materials. The ball-end milling cutter comprises a cutter clamping handle, a cutting portion and a transitional portion which are made of hard alloy materials, the transitional portion is positioned between the cutter clamping handle and the cutting portion, the cutting portion is provided with four spherical spiral cutting edges which are intersected at a ball end on the top of the milling cutter, a cutting edge passivation value of the ball end ranges from 0.3 micrometer to 0.5 micrometer, a spiral angle between two spherical spiral cutting edges which are symmetrically distributed is 40+ / -0.5 degrees, and a spiral angle between the other two spiral cutting edges which are symmetrically distributed is 42+ / -0.5 degrees. Cutting edge passivation treatment is performed for the R-angle position of the ball end, accordingly, connecting arc cutting points of the cutter are increased, the lengths of the cutting edges are increased, local abrasion is reduced, a resonance state is eliminated by the design of the different spiral angles of the cutter, and tipping is reduced.

Description

technical field [0001] The invention relates to the technical field of machine tools and milling machine cutters, in particular to a ball end milling cutter suitable for processing superalloy materials. Background technique [0002] The steam turbine is an external combustion rotary machine that can convert steam heat energy into mechanical work. After the steam from the boiler enters the steam turbine, it passes through a series of annular nozzles and moving blades in sequence to convert the heat energy of the steam into the mechanical energy of the turbine rotor rotation. In the steam turbine, the energy of steam is converted in different ways, thus constituting the steam turbine with different working principles. [0003] The moving blades of the steam turbine are installed on the rotor impeller or drum, accept the high-speed airflow from the nozzle cascade, convert the kinetic energy of the steam into mechanical energy, and make the rotor rotate. The blade is generally ...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the problems of wear and chipping, short service life and high processing cost of the cutting tool of the steam turbine blade made of high-temperature alloy material in the prior art, and to provide a tool suitable for processing high-temperature The ball end milling cutter made of alloy material can reduce the problem of tool wear and edge chipping, prolong the service life of the tool, thereby reducing the processing cost

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