Optimization Of Machining Techniques

First of all, machining models are required to determine the optimum machining parameters including cutting speed, feed rate and depth of cut, in order to minimize unit production cost. Unit production cost can be divided into four basic cost elements:

• Cutting cost by actual cut in time
• Machine idle cost due to loading and unloading operation and idling tool motion cost
• Tool replacement cost
• Tool cost

For the optimization of unit production cost, practical constraints which present the state of machining processes need to be considered. The constraints imposed during machining operations are:

 
• Parameter constraint – Ranges of cutting speed, feed rate and depth of cut.
• Tool life constraint – Allowable values of flank wear width and crater wear depth.
• Operating constraint – Maximum allowable cutting force, power available on machine tool and surface finish requirement.

An optimization model for multi-pass turning operation can be formulated. The multipass turning model is a constrained nonlinear programming problem with multiple variables(machining variables). The initial solution for SS is picked in a random way. The user-specified parameters have to be given. The experimentation can be run on a PC with Pentium800Mhz processor. The computational results validate the advantage of SS in terms of solution quality and computational requirement.