Friction and Lubrication
نویسنده
چکیده
FRICTION AND LUBRICATION in sheet metal forming are influenced by such parameters as material properties, surface finish, temperature, sliding velocity, contact pressure, and lubricant characteristics. The parameters that affect friction and lubrication are schematically shown in Fig. 7.1. Depending on these parameters, the performance of a lubricant and the coefficient of friction (COF) vary. Material flow in the die cavity is influenced by frictional conditions at the die/work piece interface. Therefore, a good understanding of the parameters that affect friction is essential for selecting lubricants and producing good-quality sheet metal parts. In sheet metal forming, the magnitude and distribution of friction affect metal flow, part defects, and quality, as well as tool wear and production costs.
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