As various small electronics components are being rapidly moved along an assembly line, their leads must be cut and clinched into holes of a circuit board for the next soldering operation. This process must be achieved economically both in time, and in combating wear by preserving the cutting tools’ sharpness. The present study investigates the shearing action and subsequent fracture in cutting. Plastic analysis for both cutting and forming (clinching) is presented with the support of measured data obtained on a prototype machine employed in the research. Wear analysis of the cutting surfaces leads to a recognition of the role played by various geometric parameters such as lead shape, cutter and anvil angles, cutter and anvil distance, etc.

Issue Section:
Research Papers
Topics:
Cutting, Electronic components, Wear, Assembly lines, Cutting tools, Die cutting, Electronics, Engineering prototypes, Fracture (Materials), Fracture (Process), Machinery, Printed circuit boards, Shapes, Shearing (Deformation), Soldering
1.
Timoshenko, S. P., and Goodier, J. N., Theory of Elasticity, 2nd Ed., McGraw Hill, 1960, New York, p. 50.
2.
Calladine, C. R., Plasticity for Engineers, John Wiley, New York, 1985.
3.
Tabor, D., The Hardness of Metals, Oxford, 1951.
4.
Johnson, K. L., Contact Mechanics, Cambridge, 1985, p. 171.
5.
Herzberg, R. W., Deformation and Fracture Mechanics of Engineering Materials, 3rd Ed., John Wiley, 1989, p. 250.
6.
Engel, P. A., Impact Wear of Materials, Elsevier, Amsterdam, 1976; reprinted by the author (1995).
7.
Wear Specifications for Cutter Material, supplied by the Universal Instruments Co.
This content is only available via PDF.
Copyright © 1998
 by The American Society of Mechanical Engineers
You do not currently have access to this content.