Manufacturing process of 0.68 mm nonmagnetic alloy balls

Abstract

The invention relates to a manufacturing process of 0.68 mm nonmagnetic alloy balls, which comprises the following successive steps: (1) inspecting a raw material; (2) cutting the material; (3) finishing the balls; (4) thermally treating; (5) cleaning and drying; (6) roughly grinding; (7) processing by using a rough millstone; (8) primarily grinding; (9) sorting; (10) fine grinding for the first time; (11) fine grinding for the second time; (12) inspecting for the first time; (13) cleaning; (14) visually sorting the balls; (15) inspecting for the second time; and (16) oiling and packaging in plastic bottles. The invention has the advantages that (1) the traditional equipment are fully utilized to process the extremely small product made of special materials and used for special purposes, and the product has stable quality level and fully meets the requirements of national defense industry; (2) the processing mode of the millstone with a small groove angle, small groove spacing, great groove depth and middle opening is adopted so as to ensure the stability and the consistency of the processing process of the extremely small steel balls, and unqualified products are prevented.

Description

technical field [0001] The invention relates to a manufacturing process of a 0.68mm non-magnetic alloy ball. Background technique [0002] Bearings are widely used mechanical parts in all walks of life. They are inseparable from guide rails and computer hosts in households, as large as airplanes and ships. They are also indispensable in the military industry and aerospace fields. Now the bearings are getting smaller and smaller, and even the "drills" used in watches in the past are replaced by bearings. And the 0.68mm ball we want to develop is also a very small ball. Another feature of this ball is that it has no magnetism. It is used in the directional gyroscopes in missiles and satellites. Because it has no magnetism, it will not be affected by the earth's magnetic field and will not affect the positioning accuracy. [0003] In the past, the non-magnetic bearings used in positioning systems such as missile satellites were all processed with beryllium bronze, but there a...

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Problems solved by technology

[0003] In the past, the non-magnetic bearings used in positioning systems such as missile satellites were processed with beryllium bronze, but there are two problems: 1. Beryllium bronze is poisonous, especially when it produces toxic gas, which is not environmentally friendly.

Third, the OcrNi55Al3 material is tough and hard, and it is very difficult to process. Basically, no domestic manufacturer dares to accept this product (the material price is as high as 2000 yuan / kg, the ball diameter is only 0.68mm, and the precision requires G10)

[0008] Due to the complex materials and manufacturing process of the above-mentioned process, its technology is still in the stage of small batch production, the quality of finished products cannot be satisfied, and the failure rate is high, so it cannot meet the needs of the defense industry

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