Eccentric shaft and manufacturing method thereof

Abstract

The invention discloses an eccentric shaft and a manufacturing method thereof. The eccentric shaft is made from non-quenched and tempered steel with ferrite-pearlite structure, in particular 38MnVS6 non-quenched and tempered steel. The manufacturing method thereof includes: heating, the heating temperature ranges from 1150 to 1200 DEG C; forging, one-time forging is used in a forging process, both ends of the eccentric shaft are forged at the multi-step low final forging temperature, and the final forging temperature is controlled to range from 800 to 850 DEG C; and cooling, a forged workpiece is suspended to be air-cooled. The non-quenched steel eccentric shaft manufactured by the invention dispenses with the quenching and heating processing working procedure, thereby generating obvious positive effects, namely that the production period is shortened, the phenomena of product deformation and cracking are reduced, the rate of finished products is increased, and energy consumption and environmental pollution are reduced. Compared with the process, the eccentric shaft manufactured by the non-quenched and tempered steel can save 39 percent of electrical energyaccording to the calculation.

Description

technical field [0001] The invention relates to a mechanical device, in particular to an eccentric shaft. [0002] The invention also relates to a manufacturing process of a mechanical device, in particular to a manufacturing process of an eccentric shaft. Background technique [0003] Jaw crusher is an indispensable equipment for material crushing in mines, quarries, road construction, bridge engineering, metallurgy, chemical industry, building materials and other departments. The eccentric shaft is the main shaft of the jaw crusher, which is the main force-bearing part of the crusher. Through the rotation of the eccentric shaft, the crusher drives the movable jaws on both sides to move up and down. When the movable jaw rises, the angle between the toggle plate and the movable jaw becomes larger. , Push the movable jaw plate close to the fixed jaw plate, so as to crush or chop the material to achieve the purpose of crushing. Therefore, the eccentric shaft has high require...

AI Technical Summary

Problems solved by technology

[0004] However, quenching and tempering treatment is prone to heat treatment defects such as deformation and cracking in the process of heating and heat preservation and quenching and extreme cold, resulting in high scrap rate, high energy consumption and environmental pollution, which is increasingly unsuitable for modern production. Energy saving and environmental protection requirements; , for parts with a large cross-section, it cannot be hardened, resulting in a large performance gap between the core and the surface of the part, which affects the comprehensive mechanical properties of the part

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