Large-sized main shaft direct-drive type rotary worktable structure

Abstract

The invention discloses a large-sized main shaft direct-drive type rotary worktable structure. A torque motor stator is combined on a worktable base, a torque motor rotor is combined on a connector, and the connector is combined with a worktable; the connector is located on the worktable base through a thrust ball bearing A, an inner hole of the connector is connected with an outer ring of a double-row cylindrical roller bearing in a matched way, the double-row cylindrical roller bearing is mounted on a main shaft, and the main shaft is connected and combined with a central hole of the worktable base; a pressure block connected with the main shaft is connected with the connector through a thrust ball bearing B; a stator of an encoder is fixed on a flange plate C, the flange plate C is fixed on the main shaft, and a rotor of the encoder is fixed on the worktable through a flange plate A and a flange plate B; the central hole of the worktable is connected with a worktable cover plate, and the worktable cover plate is connected with the flange plate B. A torque motor is adopted for directly driving the rotary worktable to rotate; the large-sized main shaft direct-drive type rotary worktable structure has the characteristics of compact structure, small noise, high precision, high reliability and the like, and can greatly improve the automation level of advanced machine tools in China.

Description

technical field [0001] The invention relates to a machine tool rotary table structure, in particular to a large-scale spindle direct-drive rotary table structure, which belongs to the technical field of large-scale machine tool processing equipment. Background technique [0002] With the development of the manufacturing industry, CNC machine tools are developing towards high speed, high precision, flexibility and high reliability. The rotary table is the main functional part of the CNC machine tool, and its functions and parameters directly affect the processing capability and precision of the machine tool. At present, the rotary table adopts mechanical transmission, and the processing and manufacturing of the headstock box and the internal gear of the headstock have strict requirements, so the processing technology is relatively complicated, and due to the existence of the mechanical transmission chain, the turntable can complete the start-up, acceleration, During reversin...

AI Technical Summary

Problems solved by technology

At present, the rotary table adopts mechanical transmission, and the processing and manufacturing of the headstock box and the internal gear of the headstock have strict requirements, so the processing technology is relatively complicated, and due to the existence of the mechanical transmission chain, the turntable can complete the start-up, acceleration, During reversing and parking movements, the deformation of the mechanical structure is prone to occur, and there is friction and backlash between the transmission pairs, resulting in mechanical vibration and noise during the working process of the rotary table, which in turn affects the dynamic stiffness of the rotary table and cannot Meet the high-precision requirements in the working process of the rotary table

Images