Gas bearing for large horizontal numerical control indexing disc

Abstract

The invention discloses a gas bearing for a large horizontal numerical control indexing disc. The gas bearing for the large horizontal numerical control indexing disc comprises a body, wherein a rotating mandrel is rotationally arranged at the central position of the body; an extension disc is arranged at the top end of the rotating mandrel; a disc surface is arranged at the top of the extension disc; a sunken groove is formed in one side, opposite to the rotating mandrel, of the inner side of the body; a sealing pressure ring is fixedly arranged at the edge of the sunken groove; and a secondsealing ring is arranged between the bottom of the sealing pressure ring and the sunken groove. According to the gas bearing for the large horizontal numerical control indexing disc, a gas bearing structure is designed, the problem that the cost is increased due to the fact that a large bearing is used by a large rotary table is solved, the loading capacity of the rotary table is improved exponentially through a combination mode of matching the large rotary table with a small and medium bearing and the gas bearing, the gas bearing structure is used as the protection of a conventional bearing,so that the service life of the conventional bearing is prolonged, the manufacturing cost of the rotary table is reduced, and the service life of the rotary table is prolonged.

Description

technical field [0001] The invention belongs to the technical field of horizontal numerical control indexing discs, and in particular relates to an air bearing used in a large horizontal numerical control indexing disc. Background technique [0002] In the machine tool industry, the specifications of the large horizontal indexing table usually increase correspondingly with the increase of the three-axis travel of the machine tool, and the corresponding rated load increases as the specification of the horizontal indexing table increases; usually 1000x1000 The rated load of the horizontal turntable is about 5~6 tons, the rated load of the 1400x1600 horizontal turntable is about 8~10 tons, the rated load of the 1600x1800 horizontal turntable is about 12~15 tons, and the rated load of the 2000x2000 horizontal turntable is about 20~25 tons; As the load of the horizontal turntable increases, the rated load of the internal support bearings also needs to be increased. The larger the...

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Problems solved by technology

[0002] In the machine tool industry, the specifications of the large horizontal indexing table usually increase correspondingly with the increase of the three-axis travel of the machine tool, and the corresponding rated load increases as the specification of the horizontal indexing table increases; usually 1000x1000 The rated load of the horizontal turntable is about 5~6 tons, the rated load of the 1400x1600 horizontal turntable is about 8~10 tons, the rated load of the 1600x1800 horizontal turntable is about 12~15 tons, and the rated load of the 2000x2000 horizontal turntable is about 20~25 tons; As the load of the horizontal turntable increases, the rated load of the internal support bearings also needs to be increased. The larger the bearing type, the more difficult it is to process, the more difficult it is to control the accuracy, and the higher the cost. Even a large part of the bearings needs to be imported from abroad. Bearings, which directly lead to a linear increase in the manufacturing cost of the horizontal turntable, and the high price of the turntable, resulting in an increase in the cost of use

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