Machine tool spindle device of numerically-controlled gear milling machine for spiral bevel gear

Abstract

The invention relates to a machine tool spindle device of a numerically-controlled gear milling machine for a spiral bevel gear. The machine tool spindle device comprises a spindle box body and a machine tool spindle arranged in the spindle box body. The machine tool spindle device is characterized in that a torque motor stator and a torque motor rotor are fixed into the spindle box body, the torque motor rotor is connected with the machine tool spindle through a taper sleeve and a key, a coder is installed at one end of the machine tool spindle through a sleeve and a locking nut, and a damping mechanism capable of applying opposite force to the middle portion of the machine tool spindle is installed on the middle portion of the machine tool spindle. The machine tool spindle device has the advantages that because the machine tool spindle is directly driven by a torque motor to rotate, loss, caused by transmission of a swinging table, of transmission precision and transmission efficiency can be avoided, and the motion speed of the machine tool spindle can be increased; the problem that due to the adoption of a gear transmission mechanism, machining precision can be affected, and transmission errors and large noise can easily occur can also be solved; in addition, opposite force is applied to the machine tool spindle by a hydraulic motor through gear transmission and plays a role in damping, and therefore transmission of the machine tool spindle is smoother and more reliable, and machining precision is improved.

Description

technical field [0001] The invention belongs to the technical field of gear machine tools, in particular to a tool spindle device of a numerically controlled spiral bevel gear milling machine. Background technique [0002] The CNC spiral bevel gear milling machine is used for high-speed and precise cutting of spiral bevel gears, improving the precision and smoothness of the tooth surface, meeting the requirements of stable transmission, reducing noise and improving precision. [0003] The tool spindle of the traditional gear milling machine is driven by a cradle, that is, the cutting tool (cutterhead) is fastened to the spindle of the cradle, and the cutterhead is installed in a certain position by means of the rotation of the eccentric drum of the cradle. This will not only lose transmission accuracy and transmission efficiency, but also limit the movement speed of the tool spindle. Due to the limitation of the tool spindle structure of the above-mentioned gear milling mac...

AI Technical Summary

Problems solved by technology

This will not only lose transmission accuracy and transmission efficiency, but also limit the movement speed of the tool spindle

Due to the limitation of the tool spindle structure of the above-mentioned gear milling machine, at present, only the intermittent indexing method can be used to process spiral shrinking bevel gears and hypoid gears, but the continuous indexing method cannot be used to process cycloidal contour bevel gears and hypoid gears gear

Although the second-generation tool spindle structure using gear transmission has appeared in the past year, due to the influence of the machining accuracy of the gear itself, transmission errors are prone to occur, which in turn affects the machining accuracy of bevel gears.

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