Two-time roll-expanding equipment for bearing precision forging and production process of two-time roll-expanding equipment

Abstract

The invention relates to the technical field of bearing machining, in particular to two-time roll-expanding equipment for bearing precision forging and a production process of the two-time roll-expanding equipment. The two-time roll-expanding equipment comprises a synchronous material moving mechanism, a two-time roll-expanding mechanism, a diameter adjusting mechanism and a discharging mechanism.The synchronous material moving mechanism is arranged beside the two-time roll-expanding mechanism. The diameter adjusting mechanism is arranged at one end of the two-time roll-expanding mechanism. The discharging mechanism is arranged at the tail end of the synchronous material moving mechanism. The two-time roll-expanding mechanism comprises two roll-expanding machines, and the two roll-expanding machines are arranged at the front end of the synchronous material moving mechanism side by side. Through two-time diameter adjusting machining on a blank, the two-time roll-expanding equipment hasthe following advantages that the pressure of the roll-expanding machines is reduced, and then the service life of the equipment can be prolonged; it can be guaranteed that the metal flow line of products is good; and the hole diameter of punching forming of the blank can be reduced, on one hand, waste generated by punching can be reduced, material losses can be reduced, and on the other hand, the work pressure of punching and bottom cutting equipment can be reduced, and the service life of the equipment can be prolonged.

Description

technical field [0001] The invention relates to the technical field of bearing processing, in particular to a double-rolling equipment for precise forging of bearings and a production process thereof. Background technique [0002] The production of bearing rings needs to be rolled and expanded, and the hole pattern of the bearing blank is gradually enlarged in diameter and formed through rolling and expanding. In the prior art, one-time rolling is used for rolling, and the billets after bottom cutting are all rolled and expanded once by using a rolling machine, and then the blanks are cooled. [0003] However, the prior art still has the following deficiencies in the production process. First, the pressure of the rolling machine caused by one-time rolling and expansion is large, resulting in a shorter service life of the rolling machine; The metal streamlines are poor; thirdly, with one-time rolling and expanding processing, the hole diameter formed by the pre-order punchin...

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Problems solved by technology

[0003] However, the prior art still has the following deficiencies in the production process. First, the pressure of the rolling machine caused by one-time rolling and expansion is large, resulting in a shorter service life of the rolling machine; The metal streamlines are poor; thirdly, with one-time rolling and expanding processing, the hole diameter formed by the pre-order punching and bottom cutting needs to be large enough, on the one hand, it will bring greater pressure to the punching and bottom cutting equipment, on the other hand The punched waste is relatively large, which will cause waste of materials; fourth, there is a certain error in the size of the annealed product in the prior art, and the spheroidized structure is unstable. The produced blanks immediately enter the material box, and the temperature is too high , the cooling is not in place, it is easy to generate heat, resulting in changes in the internal structure and external shape of the product, which seriously affects the later service life and quality of the product

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