Several new tools that change the traditional process of tractors manufacturing are introduced,such as hard turning tool,shallow hole machining tool,deep hole machining tool,locating pin hole machining tool and long hanging stretched hole machining tool.

We introduce process design,equipment selection and plane layout of production line for SG series gear boxes.

The paper introduced that YTO group corporation has achieved collinear processing of E series and Xiaokangpan gearbox housing by the technological transformation.This process improvement has certain reference to machining process for the box-type parts.