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C. K. Toh 《The International Journal of Advanced Manufacturing Technology》2007,31(7-8):688-693
Advances in machining technology, particularly in the field of micro-machining, have led to the design and creation of miniature
components suitable for use in the precision engineering industry. However, the need to contain ubiquitous burrs still exists
and has to be addressed. Previous studies on deburring have mostly focused on the parametric investigations of orientation,
temperature, type of liquid media and abrasives, frequency, deburring time and power. It is hypothesized that by inducing
compressive residual stresses on a pre-machined workpiece surface, the resulting burrs caused by machining can be minimized
or even eliminated. The paper presents the findings of an investigative study into the possibility of inducing compressive
residual stresses on machined surfaces by the use of ultrasonic cavitation, with the aim of reducing or eliminating burr formation.
The paper also briefly reviews the development of ultrasonic cavitation and covers published work on deburring by ultrasonic
cavitation. Experimental results are presented on the performance of ultrasonic cavitation peening on the residual stress
in Stavax stainless steels and on micro-burr formation. 相似文献
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Micro-burr formation and minimization through process control 总被引:6,自引:1,他引:6
This paper presents an investigation on micro-burr formation in machining. Micro-cutting is compared with conventional cutting in terms of cutting process characteristic and cutting conditions. In this paper, tungsten–carbide micro-mills were used to cut holes (in a drilling-like process) to investigate top burr formation. The size and type of burr created in stainless steel 304 are studied as a function of machining variables, which are feed, cutting speed and cutting edge radius, to help illuminate the micro-burr formation mechanisms. A series of experiments was conducted to study tool life as a function of cutting conditions. Tool life, here, is defined as the number of holes created before a significant increase in burr height. Based on experimental results, contour charts for predicting burr formation as well as tool life are developed to minimize burr formation and to improve tool life. The model, which includes the effect of feed, cutting speed, and the interaction between the two, predicted the burr height and tool life values with an accuracy of about ±15%. 相似文献
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