High precision direct drive rotary table

Abstract

The invention discloses a high-precision direct-driven type rotary worktable. The high-precision direct-driven type rotary worktable comprises a base, a worktable body, a direct-driven motor and a radial hydraulic brake device. The worktable body is arranged on the top of the base through a crossed roller bearing. The direct-driven motor is arranged on the base and can drive the worktable body to rotate. The radial hydraulic brake device is arranged on the base. The high-precision direct-driven type rotary worktable is reasonable and exquisite in structure design; the direct-driven motor is used for driving the worktable body directly, a traditional structure of a traditional worm and worm gear is greatly simplified, and the problems of high abrasion and heat generated in transmission of the traditional worm and worm gear are avoided. Precise indexing is achieved, work stability is good, and precision is high; when braking is needed, a hydraulic system is used for injecting high-pressure hydraulic oil into an annular volume cavity, so that the annular volume cavity is expanded to form annular braking force which is evenly exerted on the outer circumferential surface of the worktable body, and the deflection problem of the worktable body in the braking process is avoided; braking reliability is effectively improved, stability is good, machining precision is guaranteed, working stability is good, and wide application and popularization are facilitated.

Description

technical field [0001] The invention relates to the technical field of rotary tables, in particular to a high-precision direct-drive rotary table. Background technique [0002] The rotary table is mainly used to support the workpiece and make it perform linear and rotary adjustment and feed movement. Using it to clamp the workpiece can expand the manufacturability and shorten the auxiliary time. It can be used for boring, milling or grinding of straight line and circular plane, adjustment, feed, indexing, commutation and other movements. Equipped with a wide range of speed regulation, the best feed rate can be obtained. It is widely used in the field of machining. In actual production, the rotary table can not only form compound motion processing parts with the main machine in the rotating state, but also require the work table to work under the brake state. This also puts higher requirements on the stability and reliability during braking. [0003] Although the brake d...

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Problems solved by technology

[0003] Although the brake devices on the existing rotary workbench can roughly meet the requirements of use, the design is not ingenious. They all use multiple brake components for symmetrical settings, and correspondingly press the main shaft of the workbench or the worm gear shaft to achieve braking. Purpose, it is easy to cause deflection of the workbench during braking due to uneven braking force, poor stability, and affect machining accuracy

Moreover, the existing rotary tables are all driven by worms and worm gears. The structure is relatively complicated. Not only is the volume large, but also after a long time of work, it is prone to high heat generation and high wear. It is difficult to ensure the stability of the work, resulting in indexing movements. imprecise

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