Review and Design of Combination Tool Head for Truncated Pivot Thrust Bearing Holder

Conventional methods of machining use the drilling, boring and grooving operations to produce parts of desired shape to function for specific applications. There is a trend to combine two or more operations in-order to save the tool setting time and the subsequent loss in the machine idle time and labor cost lost incurred as a result of loss in time in tool change. Step drills and form tools are common examples of such tool changes adopted with the intention to save machine time. In our case the application that requires a combination tooling is the development bearing that is used in wind operated overhead exhaust fan commonly called the wind ventilator. A certain Paramount Industries are to develop the bearing for this application in Nylon-6 material with two different thrust end geometry. The project involves the design development and analysis of the tool that combines drilling, boring (counter-boring) and grooving operation in one tool to be used in the CNC machine with automatic tool changer. The theoretical design will be done for the cutting forces generated during operation, solid modelling will be done using Unigraphix NX-8 and the strength analysis will also be done using Ansys Workbench -16.