Metal working tool using electrical heating

Details Metal working tool using electrical heating Metal working tool using electrical heating

B - Operations, Transporting

23

Q

29/1

B23Q 17/09 (2006.01) B23B 1/00 (2006.01) B23B 27/10 (2006.01) B23B 27/16 (2006.01) B23P 25/00 (2006.01)

Patent

CA 1240494

- 19 - Abstract of the Invention A hot metal-working tool 10 using electrical resistance heating. Metal-working tool 10 comprises seat 12, cutting insert 14 and chipbreaker 18. Electrical current source 35 provides current which flows between metal working edge 30 of insert 14 and the shear zone 80 of a workpiece 72 during the machining operation. Cutting insert 14 comprises two structural components, one of which 26, contacts chip 82 thereby providing a second path for current flow between tool 10 and shear zone 80. Shear zone 80 may thus be heated by current not passing through metal-working edge 30. The invention also provides for the flow of coolant fluid through internal passages in tool 10. The coolant fluid removes heat from metal working region 28 and is then discharged to bathe the region proximate metal working edge 30.

462810

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