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Diamond Tool Tip Ultrasonic Drilling

IP.com Disclosure Number: IPCOM000074279D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 2 page(s) / 18K

Publishing Venue

IBM

Related People

Grandia, J: AUTHOR [+2]

Abstract

It has been found that when a diamond tool-tip with a square cross section is employed for the ultrasonic drilling of, for example, alumina the diamond tool so shaped cleaved longitudinally or diagonally and its corners often broke off during drilling.

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Diamond Tool Tip Ultrasonic Drilling

It has been found that when a diamond tool-tip with a square cross section is employed for the ultrasonic drilling of, for example, alumina the diamond tool so shaped cleaved longitudinally or diagonally and its corners often broke off during drilling.

To obviate this problem the tool-tip is chamfered as shown, for example, in the figure. An effective angle for the chamfer has been found to be 45 degrees, with an effective chamfer distance being about 0.015 inch, as measured from the original edge of a diamond of approximately 0.040 inch by 0.040 inch, in dimension. Tools with other than a square cross section shape can likewise be chamfered. For example a tool shaped with a rectangular or circular cross- section can be appropriately chamfered. A chamfered tool-tip has also been found helpful when a milling operation is being performed, i.e., when the workpiece is being moved with respect to the tool-tip during the drilling operation.

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