MATHEMATICAL ANALYSIS OF SQUARE HOLE DRILLING MECHANISM

Abstract

Square hole is produced by Press working, Broaching, Non-conventional machining process like Wire EDM, CNC machines, Laser cutting, etc. These methods which mentioned have a complexity of manufacture along with high cost. Creating a square hole using a drill, in addition to having an easier manufacturing process, reduce the cost and time. In this paper, mathematical model of triple cam rotation of constant width inside a square frame is discussed. So, by designing a drilling tool on cam it would be creating a square hole on the work piece. During the rotation of the cam, the center of rotation is not fixed and this is the major problem in this mechanism. There is need to a non-coaxial coupling to transmit the rotational motion. The result of Universal non-coaxial coupling has been used were shown that the rotational velocity of input and output shafts are equals. This coupling can be used for transmitting the rotational motion from the drill to the cam and drilling tool to get a square hole shape.