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Direct drive type numerical control precision rotary table and machine tool

A direct-drive, precise technology, used in drive devices, metal processing mechanical parts, large fixed members, etc., can solve problems such as low transmission efficiency, complex assembly, increased backlash of gear pairs or worm gear pairs, etc. High positioning accuracy and repeat positioning accuracy, convenient installation and debugging, and short assembly cycle

Pending Publication Date: 2022-03-18
上海赛卡精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the structural design of traditional CNC turntables, double-gear anti-backlash transmission or worm gear transmission is generally used. The disadvantages are complex mechanical structure, long transmission chain, large number of parts, high manufacturing precision of key parts, complex assembly, and transmission. Low efficiency, etc.; after a period of use, due to the wear of the mechanical transmission chain, the backlash of the gear pair or worm gear pair increases, and further maintenance and adjustment are required
In addition, due to the large transmission ratio of the worm and worm pair, the maximum speed of the CNC turntable is greatly limited, which cannot meet the increasing requirements for the feed and rapid feed speed of the rotating coordinate axis of CNC machine tools in the market.

Method used

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  • Direct drive type numerical control precision rotary table and machine tool

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Effect test

Embodiment 1

[0039] This embodiment provides a direct-drive CNC precision turntable, such as figure 1 As shown, it includes a turntable bearing 11, a rotary spindle 12, a turntable bearing seat 13, a rotor 20 of a torque motor, a stator 21 of a torque motor, a connecting flange 22, a rotary table 19, a connecting flange chassis 25 and a bushing 23 ;

[0040] The rotor 20 of the torque motor is rigidly connected to the rotary spindle 12 by connecting the flange 22 and fastening bolts; the inner ring of the turntable bearing 11 is assembled and connected to the rotary spindle 12, and the rotary table 19 is directly rigidly connected to the rotary spindle 12 .

[0041] The stator 21 of the torque motor is assembled and connected with the connecting flange chassis 25 and the bushing 23 through fastening bolts; the outer ring of the turntable bearing 11 is assembled and connected on the turntable bearing seat 13, and then the turntable bearing seat 13 is connected with the fixed torque motor s...

Embodiment 2

[0048] This embodiment provides a machine tool, including the direct-drive CNC precision turntable described in any one of the first embodiment.

[0049] To sum up, the present invention provides a direct-drive CNC precision turntable and machine tool. The rotary table is directly driven by a torque motor without any transmission pair in the middle to achieve "zero" backlash, and theoretically there is no mechanical transmission chain wear and no loss of transmission efficiency; because the torque motor has extremely high static and dynamic load rigidity, it can maintain high positioning accuracy and repeat positioning accuracy even under high-speed rotary motion; the torque motor directly drives the rotary table, which can provide higher With large torque, it participates in the turning process and realizes the combined function of turning and milling; the design adopts a hydraulic brake device to realize the powerful cutting process after the rotary table is braked and locked...

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Abstract

The invention discloses a direct-drive numerical control precision rotary table and a machine tool, and the precision rotary table comprises a rotary table bearing, a rotary main shaft, a rotary table bearing seat, a rotor of a torque motor, a stator of the torque motor, a connecting flange plate, a rotary table, a connecting flange chassis and a bushing; a rotor of the torque motor is rigidly connected with the rotary main shaft through the connecting flange plate; an inner ring of the rotary table bearing is mounted on the rotary main shaft, and the rotary table is rigidly connected with the rotary main shaft; a stator of the torque motor is assembled and connected with the connecting flange chassis and the bushing; an outer ring of the rotary table bearing is installed on the rotary table bearing seat, and the rotary table bearing seat is in rigid connection with a lining of the fixed torque motor stator. The device is simple in structure, convenient to install and debug, short in assembly period, high in precision stability and convenient to repair and maintain.

Description

technical field [0001] The invention relates to the field of machine tools, and more specifically, to a direct-drive numerical control precision turntable and a machine tool. Background technique [0002] CNC turntable is an important machine tool accessory, mainly used in machining centers and CNC boring and milling machines, as the fourth axis to participate in the control of coordinate axes. The application of the CNC rotary table provides the rotary coordinates for the machine tool. The rotary table is driven by the fourth axis and the fifth axis to complete equal, unequal or continuous rotary processing, which makes it possible for customers to process complex curved surfaces and expands the processing range of the machine tool. . [0003] Technical problems existing in the closest prior art to the present invention: [0004] In the structural design of traditional CNC turntables, double-gear anti-backlash transmission or worm gear transmission is generally used. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q1/52B23Q1/72B23Q5/10B23Q5/20
CPCB23Q1/52B23Q1/72B23Q5/10B23Q5/20
Inventor 朱长春杨锐俊
Owner 上海赛卡精密机械有限公司
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