Speed increasing device for machine tool spindle

Abstract

The invention relates to a speed increasing device, in particular to the speed increasing device for a machine tool spindle, and belongs to the technical field of machine tool processing. The speed increasing device for the machine tool spindle comprises a broach unit and a power transmission unit, wherein the broach unit and the power transmission unit are fixed by a box and a cover plate which are arranged at the bottoms of the broach unit and the power transmission unit; and the power transmission unit is used for driving the broach unit to rotate. The speed increasing device has the beneficial effects that the structure of the machine tool is not changed; power is switched in by using a connecting sleeve to drive a planetary gear train to rotate and cause the whole spindle to run at high speed; the milling speed of a workpiece is improved; the flatness and smoothness of the surface of the formed workpiece are improved; machine parts do not need to be replaced; and the speed increasing device can be quickly disassembled and assembled.

Description

technical field [0001] The invention relates to a speed-up device, in particular to a speed-up device for a machine tool spindle, which belongs to the technical field of machine tool processing. Background technique [0002] Machine tool spindles are generally connected to DC spindle motors and AC spindle motors to provide power input. Existing machine tool spindles often have problems such as slow spindle speed and large surface roughness of workpieces due to long service life of motors or heavy loads. The machine tool spindle is realized by replacing the high-speed motor. When replacing the high-speed motor, there are often problems that the motor needs to be disassembled and the electrical system needs to be adjusted at the same time, which increases the cost of replacement. The high-speed electric spindle that has appeared in recent years is the core component of high-speed machine tools. Combine the spindle of the machine tool and the shaft of the variable frequency mot...

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Problems solved by technology

[0002] Machine tool spindles are generally connected to DC spindle motors and AC spindle motors to provide power input. Existing machine tool spindles often have problems such as slow spindle speed and large surface roughness of workpieces due to long service life of motors or heavy loads. The machine tool spindle is realized by replacing the high-speed motor. When replacing the high-speed motor, there are often problems that the motor needs to be disassembled and the electrical system needs to be adjusted at the same time, which increases the cost of replacement. The high-speed electric spindle that has appeared in recent years is the core component of high-speed machine tools. Combine the spindle of the machine tool and the shaft of the variable frequency motor into one, that is, the stator and rotor of the spindle motor are directly installed inside the spindle assembly, also known as the built-in electric spindle, and no belt or gear transmission pair is used to realize the spindle system of the machine tool "Zero Transmission"

The electric spindle is a precision electrical component combined with the rotor shaft. When assembling, the rotor must be heated to a certain temperature in an oil bath, and then hot-pressed and assembled quickly. The stator of the motor needs to be fixed on the electric spindle through a cooling device. In the shell, the assembly process is cumbersome, the assembly conditions are harsh, and the cost is too high

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