A kind of production method of cylinder liner

Abstract

Provided is a cylinder sleeve producing method which can reduce raw materials consumption, subsequent machining workload and manufacturing cost. The method comprises the following steps: 1) molding by a lost foam; 2) pouring and cooling to form a casting blank of a cylinder sleeve; 3) roughly machining the casting blank of the cylinder sleeve; 4) heat-treating; 5) machining platform cross hatches. Compared with traditional common sand mold casting processes, the lost foam casting process adopted in the invention not only has the similar inheritance in alloy solidification characteristics, also has the complementarity in molding process. Obviously, the lost foam casting process has the advantages of improving the quality of the cylinder sleeve product and the stability of the inner structure greatly, reducing the raw materials consumption of the casting and the total energy sources needed in metal smelting, saving energy, reducing emission, benefiting environment protection and reducing the subsequent machining workload and manufacturing cost at the same time.

Description

technical field [0001] The invention relates to metal materials, in particular to a production method of a supercharged engine cylinder liner. Background technique [0002] In the prior art, engine cylinder liners are made of boron cast iron, boron-copper cast iron, chrome-molybdenum-copper cast iron, high-phosphorus alloy cast iron, high-phosphorus cast iron, high-content chromium-molybdenum-nickel cast iron, chromium-molybdenum-copper-boron alloy cast iron, etc. Traditional casting methods usually use sand casting. During production, the mold that forms the outer surface shape of the product and the sand core that forms the inner surface shape are operated separately. The outer mold of the shape includes three parts: the product shape cavity molding mold, two riser molding molds and the gating system molding mold. When modeling, the three are now placed on the modeling plate according to their relative positional relationship for modeling. When taking the mold, first tak...

AI Technical Summary

Problems solved by technology

On the one hand, the traditional sand casting process itself has complicated procedures, is highly dependent on the casting skills of the practitioners, has high labor intensity, serious dust pollution from sand processing, and great occupational hazards for the practitioners, which leads to difficult casting quality. Stable, and the team of employees is also unstable; on the other hand, the castings produced by ordinary sand casting have low dimensional accuracy, so the machining allowance is too large, usually between 5 and 6mm

Limited to the dual limitations of ordinary sand molding process and the size of the sand box space, the yield rate of each molding casting process is very low, only 60%

This not only increases the raw material consumption of the casting itself and the total amount of energy required for smelting metal, but also increases the workload and manufacturing cost of subsequent machining

[0003] At present, the traditional sand casting method can no longer meet the requirements of modern green manufacturing. This method greatly increases the raw material consumption of the casting itself and the total amount of energy required for smelting metal, and also increases the workload and manufacturing cost of subsequent mechanical processing.

Images