Double-V-shaped floating self-aligning supporting structure and machining method of supporting block in double-V-shaped floating self-aligning supporting structure

Abstract

The invention relates to a double-V-shaped floating self-aligning supporting structure which comprises two supporting frame combinations and an arc-shaped positioning seat. The two supporting frame combinations are fixed to an arc-shaped positioning seat of a grinding machine through bolts, each supporting frame combination comprises a supporting frame, a supporting seat and a supporting head, wherein an adjusting screw is rotationally arranged on the supporting frame, the supporting seat is movably connected with the supporting frame through the adjusting screw, the supporting head is rotationally connected with the supporting seat through a pin, the supporting head comprises a supporting block, and the supporting block is made of polycrystalline diamond PCD or polycrystalline pure diamond CVD. The machining method of the supporting blocks comprises the following steps of conducting scanning and ablating by adopting an ultraviolet laser, and ablating a wedge groove of an array microstructure on the upper surface of the supporting block. According to the double-V-shaped floating self-aligning supporting structure, the machining precision of a bearing ring is guaranteed, meanwhile,the obvious appearance defects of spots, uneven local color and luster and the like generated by an outer diameter surface phosphating film during rolling path grinding of the bearing ring in the prior art are overcome, and therefore the appearance quality of a bearing meets the requirements of customers.

Description

technical field [0001] The invention relates to the technical field of railway bearing grinding, in particular to a double V-shaped floating self-aligning support structure and a processing method for the support block therein. Background technique [0002] Due to the special requirements of railway bearing products, it is necessary to carry out phosphating treatment on the outer diameter of the bearing ring, but the phosphating film is not allowed on the surface of the raceway; the existing processing method is to first carry out phosphating treatment on the entire surface of the bearing ring, and then The surface of the outer diameter after phosphating is used as a support surface, and the phosphating film on the raceway is ground and processed; however, the support structure of the grinding process of the bearing ring is currently a hard alloy fixed support structure, which is a combination of two The tungsten carbide support block with an angle of 120° or 150° is welded ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the background technology, the present invention discloses a double V-shaped floating self-aligning support structure; it includes two support frame combinations and arc-shaped positioning seats, and the two support frame combinations are fixed on the arc of the grinding machine by bolts. On the shaped positioning seat; the support frame combination includes a support frame, a support seat, and a support head; an adjustment screw is arranged on the support frame, and the support seat is movably connected with the support frame through the adjustment screw; the support head is connected to the support by a pin The seat is rotated and connected; when the support frame is combined in actual use, the position of the support seat is adjusted by rotating the adjustment screw, and the support seat is fixedly connected with the support frame by the locking bolt of the support seat; the support head includes a support head base, a support head V-shaped block, and a support block. The support block adopts polycrystalline diamond PCD or polycrystalline pure diamond CVD; the V-shaped block of the support head is fixed on the upper part of the support head base, the upper part of the V-shaped block of the support head is provided with a V-shaped groove, and the support block is fixed on the V-shaped The upper surface of the groove; when the bearing ring is grinding, the support block fixed on the upper surface of the V-shaped groove is floatingly supported on the outer diameter surface of the bearing ring, so that the force on each support block is more uniform, and the support is greatly improved. block wear, thereby ensuring the machining accuracy of the bearing ring; at the same time, the support block is made of polycrystalline diamond PCD or polycrystalline pure diamond CVD material, which has an extremely low friction coefficient compared with cemented carbide, thus greatly improving the bearing ring. The support friction traces on the outer diameter surface of the bearing ring solve the obvious appearance defects such as mottled and local uneven color on the outer diameter of the bearing ring in the past, so that the appearance quality of the bearing meets the customer's requirements

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