Question: If α is the rake angle of the cutting tool, φ is the shear angle and V is the cutting velocity, then express the velocity of chip sliding along the shear plane in terms of above three parameters. [ESE 2001] Answer: To solve this question, one need the knowledge of velocity triangle in machining. In an orthogonal machining of ductile material with a sharp cutting tool, three velocity parameters
Question: What is the cutting velocity in m/sec, for turning a work piece of diameter 100 mm at the spindle speed of 480 RPM? [IAS‐1998] Solution: In straight turning operation the cylindrical workpiece is rotated about a fixed axis at a fixed rpm (revolution per minute) while the cutting tool is fed parallel to the job axis after providing necessary depth of cut in transverse (radial to the workpiece) direction.
In orthogonal machining, cutting velocity (VC) , chip flow velocity (Vf) and shear velocity (VS) are interrelated. These three velocity vectors together form a triangle, which is called velocity triangle in machining. A typical velocity triangle is depicted below. Here length of the sides of the triangle indicates the magnitude of corresponding velocity. The triangle is based on the assumptions of orthogonal machining (chip is flowing in orthogonal direction) and
Machining or metal cutting is the process of gradual material removal from the workpiece with the assistance of a cutter. Quality of the machined object is not the only one parameter to judge machining performance. Independent variables are those that controls overall machining performance. Dependent variables are used to measure the machining or analyse overall machining performance. Thus dependent variables rely on independent variables. So independent variables can be altered
