Dynamics of the twist drilling process

Abstract

Owing to tool flexibility, twist drilling is a highly dynamic process. This fact is well known to all machine operators who use twist drills. The dynamic effects and their solutions, such as the use of short stub drills when drilling difficult materials, are handed down but there has been almost no fundamental analysis of this complex situation. Few researchers have even acknowledged flexibility as an important factor in twist drilling. The paper describes a first attempt to use the power of the computer to provide a numerical analysis.