Landscape engineering machinery connecting rod precision forging method

Abstract

The invention relates to a landscape engineering machinery connecting rod precision forging method. The method includes the procedures of heating, roll forging blank forming, forging forming, trimming, burr polishing, shot blasting and coining. Two-stage roll forging is adopted for the roll forging blank forming, volumetric distribution of materials for each portion of a blank piece is guaranteed by a two-stage roll forging mold profiled groove, the shot blasting is carried out first on a product after the roll forging blank forming and the forging forming, then the volume cold coining is carried out, dimensional precision is controlled through the coining, flash thickness is coined to 1.2mm from 1.8mm, the warm trimming is carried out at last, and the product is heated by using of a mesh belt furnace with temperature controlled within the range of 410+ / -10 DEG C. The landscape engineering machinery connecting rod precision forging method has the advantage of being capable of saving materials, reducing cost, improving product mechanical performance and the like, and can meet the requirement that an automatic production line can be adopted for production in follow-up process of connecting rods.

Description

Technical field [0001] The invention relates to a forging process and equipment for connecting rod type precision forgings, in particular to a precision forging method for connecting rods of garden engineering machinery. Background technique [0002] The common processes of connecting rod forging in the existing production are heating, air hammering, forging, forming, trimming, burr grinding, shot blasting, precision pressing, etc. The air hammering blank is completely operated by the distribution of the volume of materials used in each part. Factors such as workers’ skills, responsibilities, physical strength, etc., have poor consistency; affect the thickness and size of forgings and flash distribution; and the amount of deformation cannot be effectively controlled, and reasonable metal flow and organization of the product cannot be obtained; and the material consumption is large, and the production site is difficult to manage . In addition, this connecting rod forging is small...

AI Technical Summary

Problems solved by technology

[0002] The general process of connecting rod forging in the existing production is heating, air hammer blank making, forging forming, trimming, grinding burrs, shot blasting, fine pressing, etc. When air hammer blank making distributes the volume of materials used in each part, it is completely controlled by the operator. It is determined by the skill, responsibility, physical strength and other factors of the worker, and the consistency is poor; it affects the thickness and size of the forging and the flash distribution; and the deformation cannot be effectively controlled, and the reasonable metal flow line and organization of the product cannot be obtained; and the material consumption is large, and the production site is not easy to manage.

In addition, the connecting rod forging is small and thin, and the temperature dissipates quickly, so it is difficult to achieve a consistent temperature at the trimming edge, resulting in an unstable tolerance of the shape and center distance within the range of ±0.1; and residual burrs are likely to occur on the trimming edge

Images