Abstract
reep-feed grinding is a form-copying grinding process capable higher rates of material stock removal than most other conventional grinding processes. In industry, creep-feed grinding is used for form-copying grinding of material which is very hard or very tough. The most widespread application of the process is the form-copying grinding of Inconel turbine blades of gas turbines. This paper deals with the grinding wheel speed and grinding ratio aspects of creep-feed grinding of Inconel 738. These aspects were studied under conventional grinding and creep-feed grinding conditions. The following results were obtained. (1) In grinding conditions, the grinding ratio has an especially strong correlation with the grinding speed. The grinding ratio at a low wheel speed of 3 m/s is approximately 10 times larger than that of the conventional wheel speed of 33 m/s. (2) It is made clear that dulling and breaking appear on a grinding wheel at a conventional wheel speed, and self-sharpening appears at a low wheel speed, according to the estimation with the measured mean grain profiles. (3) The wheel wear of the edge part during creep-feed grinding is 4 times less than that of the conventional grinding, with low wheel speed operation.
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