Camshaft machining process and forging die

Abstract

The invention provides a camshaft machining process. The camshaft machining process includes the following steps: A, mold making, wherein a mold having a mold cavity and a flash groove is made, the shape of the mold cavity is same as the exterior shape of a camshaft forging, and the flash groove only has a flash bridge portion; B, the choice of materials, wherein the specification of a selected billet material is determined according to the following two points: 1) the cross-sectional area of the billet material is greater than that of a central shaft portion of a camshaft and less than that of a cam portion of the camshaft; 2) sufficient clearance should be formed between the outer circumference surface of the billet material and the widest portion of the mold cavity, so as to ensure that the billet material has a larger axial flow in a length direction when forged. The invention further provides a forging die for camshaft machining. The forging die comprises an upper die, a lower die and a die cavity, flash groove is formed in the periphery of the die cavity and only has a flash bridge portion; by adopting the technical proposal, the production efficiency and the material utilization rate can be improved, and the product quality can be ensured.

Description

technical field [0001] The invention relates to the field of forging, in particular to a camshaft machining process and a forging die used for machining the camshaft. Background technique [0002] Such as figure 1 A camshaft part is shown, which is composed of cam 1, cam 2, cam 3, cam 4, cam 5, cam 6, eccentric wheel A, eccentric wheel B, middle shaft diameter and cylinders at both ends, belonging to the long axis Class forgings, in which the cross-sectional area of ​​the cam and eccentric wheel is large, and the cross-sectional area of ​​the shaft diameter is small. Such camshafts are usually used as figure 2 The shown forging die is forged. The forging die includes an upper die 1 and a lower die 2. A cavity 3 is provided on the joint surface of the upper die 1 and the lower die 2. A flash structure is provided around the die cavity 3. The flash The edge structure is composed of a flash bridge part 4 and a flash bin part 5 . Before the camshaft blank is forged, it is n...

AI Technical Summary

Problems solved by technology

The blank selected in this way can well form the camshaft and the uniform flash, but the size is large, and the two ends need to be drawn out during production, so the production efficiency is low and the material utilization rate is also low

However, if a blank with a smaller specification is selected, the filling of eccentric wheel A and eccentric wheel B of the camshaft will be insufficient.

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