Manufacture method for fork of forklift

Abstract

The invention relates to a manufacture method for a fork of a forklift. The manufacture method comprises the following steps of: selecting a rectangular or quadrate long strip-shaped steel with the same cross section as that of the fork to be processed; cutting the long strip-shaped steel in length according to a technical requirement, and cutting to obtain various inclined faces as required; partially heating the cut proximate matters at bending parts; partially upsetting and forming in dies, and bending a convex face at an upsetting part as an internal surface to form a fork shape by utilizing afterheat; extruding a protuberance inside a bending angle of the fork to the outside of the bending angle through a punching die so as to form a thickened external surface of a fork bottom; cutting two ends of the fork as required; and then carrying out processing programs.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to a method for manufacturing a fork of a forklift. Background technique [0002] The fork is an L-shaped steel component that is installed on a forklift or a lifting engineering vehicle to lift various heavy objects. According to the load-bearing capacity of the fork, the fork of various specifications includes a vertical section and a horizontal section for fixing to the forklift. According to the safety requirements of the fork, the standard of the fork stipulates that the thickness of the root of the horizontal section is more than 1.2 times the thickness of other parts. This requirement brings certain difficulties to the production of the fork. [0003] At present, the main method of domestic production of pallet fork blanks is to forge and make after heating the steel billet. The production of fork blanks by forging technology requires large tonnage forging bells and ...

AI Technical Summary

Problems solved by technology

In the production process, it consumes a lot of energy and causes environmental pollution; at the same time, the labor intensity of the operators is high in the production process

[0004] When processing by ordinary upsetting method, due to the reason of the mold used for upsetting, the surface of the upsetting part looks thick, but in fact, the metal crystal density of this part is reduced, and at this time, bending treatment is carried out at this place For example, in the method shown in Chinese patent CN200810013709, the protruding part becomes the outside of the corner, which can compensate for the problem of crystal drop caused by the stretching of the outer surface during bending, and also increase the thickness of the root of the fork. There is no increase in crystal density inside, no compensation at all, and no real safety fix

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