Powder metallurgy eccentric ring and manufacturing method thereof

Abstract

The invention discloses a powder metallurgy eccentric ring. The powder metallurgy eccentric ring comprises a hole, and an eccentric ring eccentric relative to a center of the hole, wherein the eccentric ring is an annular component taking powder metallurgy as a main body; the outer wall of the middle upper part of the eccentric ring is circumferentially concave inwards to form an inner eccentric ring coaxial with the eccentric ring; wear-resistant composite layers are arranged on the surfaces of the inner wall of the hole, the outer wall of the eccentric ring and the outer wall of the inner eccentric ring. The invention further discloses a manufacturing method of the powder metallurgy eccentric ring. The manufacturing method comprises the following processes: mixing, stirring, pressing, sintering, heating, thermally forging, shaping, and chemically impregnating. By the manufacturing method, the material utilization rate is high, work hours are saved, and the machining accuracy can be achieved in a more economical way; the wear-resistant composite layers are arranged on the surfaces of the inner wall of the hole, the outer wall of the eccentric ring and the outer wall of the inner eccentric ring, and the wear-resistant composite layers are rare earth compound composite layers, so that the wear-resistant composite layers can significantly improve the wear resistance of the eccentric ring.

Description

technical field [0001] The present invention relates to an eccentric wheel and a manufacturing method thereof, more particularly, the present invention relates to an eccentric wheel manufactured by a powder metallurgy method and a manufacturing method thereof. Background technique [0002] In the automobile steering device, two eccentric wheels need to realize different actions, and the prior art is to assemble the two eccentric wheels together. The two eccentric wheels in the prior art are generally made of medium carbon steel or alloy steel, which are processed and heat treated to make the eccentric wheel have certain wear resistance. However, such an eccentric has certain shortcomings: first, the processing volume of parts is large, and there is a lot of material waste; second, the wear resistance is poor; third, it is assembled from parts. In order to ensure the accuracy of the eccentric after assembly, it must be To ensure the machining accuracy and device accuracy of ...

AI Technical Summary

Problems solved by technology

However, such eccentric wheels have certain deficiencies: one is that the parts are processed in a large amount, and there is more material waste; the other is that the wear resistance is poor; the third is that it is assembled from parts. Guarantee the processing accuracy and device accuracy of the two eccentric wheels before assembly, high manufacturing accuracy requirements and high manufacturing costs

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