DESIGN AND FABRICATION OF a DRILL JIG FOR AN END COVER OF a LOW PRESSURE VACUUM PUMP

Abstract

A jig may be defined as a device which holds & locate a work piece and guide, controls one or more cutting tools with respect to the work. It ensures that a hole to be drilled, tapped or reamed in a work piece will machine in proper place. Basically it consisting of clamping device to hold the part in position under hardened steel bush through which drill passes during the drilling operation. Jigs are used to manufacture a number of duplicate pieces. It is one of the most important production tools as it saves time of lying. It eliminates individual marking, positioning, & frequent checking & thus reduces time & increases productivity. A jig facilitates inter changeability, that is uniform quality in manufacturing any of the parts made by the jig will fit properly in assembly& all similar components are interchangeable. The quality of the equipment in the technical sense depends on the rate of production. Its purpose is to maintain low manufacturing costs & thus increasing the industrial efficiency & productivity. In this work, a turnover jig has been designed & developed for a vacuum pump end cover component. The scheme of design has been developed taking into account the precondition of the component in terms of machining already performed. The scheme for location & clamping has been developed looking into convenience of the operator. The depth of the design & fabrication is explained in detail.