Abstract：In the traditional shovel teeth grinding, dry grinding is the main way.However, in the grinding process, the increase of the grinding depth leads to the occurrence of surface microcrack, which will ultimately affect the use performance of tools.The paper introduces the use of cooling-air technology to grind shape-milling cutter in its shovel teeth grinding process and shows a test for the tool burn and the residual stress.The experimental results show that the cooling-air can validly reduce not only the tool's surface burn, but also the thermoplastic deformation of workpieces, so as to improve the residual stress and quality of tool surface.

Keyword：shovel teeth grinding;cooling-air grinding;grinding burn;residual stress;