Backlash-free dual-servo cross-axis rotary table for multi-axis CNC machine tools

Abstract

The invention discloses a non-back clearance double-servo intersecting shaft rotating table of a multi-axis numerical control machine tool. The non-back clearance double-servo intersecting shaft rotating table comprises a B-axis fixed support seat, a B-axis rotating system and a C-axis rotating system, wherein the B-axis rotating system comprises a rotating shaft B, a B-axis rotating base and a B-axis speed reducing motor, and the B-axis speed reducing motor is fixedly installed on the B-axis rotating base and is used for driving the B-axis rotating base to rotate around an axial line of the rotating shaft B through a B-axis roller arc rack mechanism; the C-axis rotating system comprises a rotating shaft C, a C-axis rotating base and a C-axis speed reducing motor, and the C-axis speed reducing motor is fixedly installed on the B-axis rotating base and is used for driving the C-axis rotating base to rotate around an axial line of the rotating shaft C through a C-axis roller arc rack mechanism. The non-back clearance double-servo intersecting shaft rotating table can be well applied to the multi-axis numerical control machine tool, the reliability of the numerical control machine tool is improved, the flexible degree of freedom of the numerical control machine tool is increased, and the product quality of processed large-scale complex members is increased.

Description

technical field [0001] The invention belongs to the field of numerical control machine tools, and more specifically relates to a backlash-free double-servo cross-axis rotary table of a multi-axis numerical control machine tool. Background technique [0002] With the progress of society and the improvement of productivity, the processing of workpieces has reached an unprecedented level of technological requirements, especially the processing of many large parts with complex structures, which poses a huge challenge to the CNC machine tools themselves and the practitioners. This requires CNC machine tools to have a more reasonable structure, more degrees of freedom, and more flexible movements to meet the processing needs of large and complex parts. [0003] The rotary table on the current multi-axis CNC machine tool is driven by a reducer. When the rotary table is rotating, its center of rotation is generally in line with the axis of the drive shaft of the reducer, which will ...

AI Technical Summary

Problems solved by technology

[0003] The rotary table on the current multi-axis CNC machine tool is driven by a reducer. When the rotary table is rotating, its center of rotation is generally in line with the axis of the drive shaft of the reducer, which will increase the burden on the reducer and require deceleration. The output torque of the machine is also larger; if the diameter is large, a very large output torque is required, and it is not easy to control, and the requirements for the servo system will be high, resulting in a substantial increase in the overall cost; in addition, the rotary table only uses one If the drive shaft is used for support, the turret will vibrate relatively large, and the turret will not run smoothly, which is obviously not conducive to the precision machining of the workpiece.

[0004] In addition, the transmission mechanism that drives the rotary table on the CNC machine tool generally adopts a gear mechanism, and the gear gap is large during gear transmission, which is not conducive to the precise control of the rotary table.

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