New Orleans, Louisiana
June 26, 2016
June 26, 2016
August 28, 2016
Machine tool is a power driven appliance to bring the cutting tool and the work piece in contact and to have a relative motion between them that executes the cut that transforms the raw stock into a finished or semi-finished component. In order for the cut to be effective work has to be held firmly and appropriately. Two kinds of devices, the jigs and fixtures, are developed and used for this purpose. A jig is primarily used in hole fabrication, for locating and holding a work-piece and guiding the production tool. A fixture, on the other hand, is used in machining and assembly for securely locating and holding the work-piece without providing a built-in guidance to the manufacturing tool. Both must provide maximum accuracy and be designed for ease of mounting and clamping of the work-piece. Tools and tool holding and rapid tool changing have become standard attachments to machine tools. The relative motion has been taken care of by the enormous developments in CAD and CAM. But fixtures, which are situated at the interface between design and production, are still not given adequate attention despite the substantial savings in investments and costs and improvement in quality that can result. Further, surveys show that expenditures on fixtures and cutting tools represent seven to ten times the capital invested in a piece of equipment during its service life. The problem is further exacerbated in a teaching laboratory where even standard work-holding devices are not stocked due to low utilization. The situation is taken as a challenge and exercises were designed to teach the students the systematic approach to the design of work-holding. This paper describes some of the experiences in the design and use of jigs and fixtures and the student learning experiences.
Sivaloganathan, S., & Ganithi, R. (2016, June), Teaching Work-Holding in Undergraduate Classes Paper presented at 2016 ASEE Annual Conference & Exposition, New Orleans, Louisiana. 10.18260/p.27354
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