High-precision spline main shaft power head supported by sleeve

Abstract

The invention belongs to the field of machine tools and particularly relates to a high-precision spline main shaft power head supported by a sleeve. Specific to the problem that the machining precision is affected due to the principle of thermal expansion and cold contraction on the premise of no main shaft cooling of a conventional power head, the following scheme is now put forwards. The high-precision spline main shaft power head comprises a connecting box body; a three-phase asynchronous motor, a servo motor and a power head are installed on the connecting box body; a lead screw is fixedly installed on an output shaft of the servo motor through a coupler; a lead screw nut is installed on the lead screw in a threaded mode; a sleeve is fixedly connected to the lead screw nut in a sleeving mode; a spline main shaft is movably installed in the power head; a body flange is fixedly connected to the power head in a sleeving mode; and the body flange is fixedly mounted on one side of the connecting box body. According to the high-precision spline main shaft power head supported by the sleeve, the servo motor is connected to the lead screw to control the feeding amount of the main shaft, the precision and the speed are far higher than those of a traditional mechanical gear or pneumatic feeding mode.

Description

technical field [0001] The invention relates to the technical field of machine tools, in particular to a high-precision spline spindle power head supported by a sleeve. Background technique [0002] In the field of CNC machine tools, power heads generally refer to power components that can realize main motion and feed motion, and have automatic workpiece circulation. In the prior art, most machine tool power heads are fed by mechanical gears or pneumatically, and When feeding, the box is connected with the motor to feed together, the bearing is heavy, the resistance is large, and the centering of the main shaft is poor. Most of the feeding methods of the existing power head are based on the line rail and the slide table. When feeding, the main shaft and the power motor are together. Movement will lead to increased inertia, poor speed adaptability, and it is difficult to achieve precise position and speed control. After a long period of use, the line rail components will lose...

AI Technical Summary

Problems solved by technology

[0002] In the field of CNC machine tools, power heads generally refer to power components that can realize main motion and feed motion, and have automatic workpiece circulation. In the prior art, most machine tool power heads are fed by mechanical gears or pneumatically, and When feeding, the box is connected with the motor to feed together, the bearing is heavy, the resistance is large, and the centering of the main shaft is poor. Most of the feeding methods of the existing power head are based on the line rail and the slide table. When feeding, the main shaft and the power motor are together. Movement will lead to increased inertia, poor speed adaptability, and it is difficult to achieve precise position and speed control. After a long period of use, the line rail components will lose the feed accuracy of the spindle due to factors such as dust accumulation or rust. The life is low, it is difficult to meet the needs of actual processing

[0003] Under the premise of no spindle cooling, the traditional power head will cause the spindle to heat up due to the principle of thermal expansion and contraction for a long time, resulting in slight deformation. When the spindle is installed on the traditional guide rail, the center line of the spindle will be shifted, which will affect the machining accuracy.

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