Near net forming method of extra-large bearing iron retainer

Abstract

The invention discloses a near net forming method of an extra-large bearing iron retainer. The method comprises the following steps that S1, a ring piece is pre-ground into a rectangular ring piece, acore roller forming die penetrates through an inner hole of the ring piece, and positioning is completed; S2, the core roll forming die drives the ring piece to gradually attached to a main roller forming die, and a ring grinding rolling system is established; S3, the ring piece enters a cavity of the main roller forming die, the upper end face and the lower end face of the ring piece are restrained through blocking edges on the two sides, and the core roller forming die extrudes the ring piece to be gradually attached to the main roller forming die; and S4, under the extrusion action of themain roller forming die and the core roller forming die, the wall thickness of the ring pieces is gradually reduced, the inner diameter and the outer diameter of the ring piece are gradually increased, and finally the ring piece is ground and formed. According to the method, by adopting the idea of near net forming, the shape contour of a retainer forged piece is designed to be approximate to thecontour of a finished product, the overall machining allowance of the product is uniform, material saving is maximized, meanwhile, the subsequent machining amount is reduced due to the reduction of the allowance, and the machining cost is reduced.

Description

technical field [0001] The invention relates to the technical field of wind power equipment, in particular to a near-net-shaping method for an extra-large bearing iron cage. Background technique [0002] In recent years, with the development of wind power technology, high-power fan main shaft bearings have been gradually developed and applied. As the main component of the bearing, the cage plays an important role in guiding the rolling elements to run on the raceway during the operation of the bearing. Bearing service life is especially important. At present, the forgings of extra-large iron cages at home and abroad basically adopt the rectangular forging rolling ring forming process. This forming method has three main disadvantages: first, the material utilization rate is too low, only about 10%, resulting in a great waste of raw materials; Second, the amount of turning is large, the working hours of turning are too high and the cost of turning is high; third, the turning ...

AI Technical Summary

Problems solved by technology

At present, the forgings of extra-large iron cages at home and abroad basically adopt the rectangular forging rolling ring forming process. This forming method has three main disadvantages: first, the material utilization rate is too low, only about 10%, resulting in a great waste of raw materials; Second, the amount of turning is large, the working hours of turning are too high and the cost of turning is high; third, the turning process of rectangular forgings destroys the forging streamline of the forging and affects the mechanical properties of the finished product

[0003] Therefore, it is necessary to adopt a near-net-shaping method for super-large bearing iron cages to solve the problems of low utilization rate of existing materials and high processing costs.

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