B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
B23P 23/02 (2006.01) B23B 29/034 (2006.01) B23B 41/12 (2006.01)
Patent
CA 2043490
METHOD AND APPARATUS FOR MACHINING A DIFFERENTIAL CARRIER ABSTRACT A machine tool and method for simultaneously boring, facing and back boring three bores in a differential carrier with three tools that rotate coaxially with their spindle axes. Each tool has a first slide at its free end that carries a first cutting insert for back boring a first diameter and then generating a radial face that serves as a bearing seat on the differential carrier. Each tool also has a second slide carrying a second insert for boring a second diameter. The construction, arrangement and movement of the two slides are correlated with each other to maintain the tool in balance during extension and retraction of both slides. In the preferred embodiment the first insert must be retracted when it is advanced into the carrier, extended to back bore and then retracted to generate a radial face. The second insert is at the same location circumferentially of the tool. One insert is retracted while the other insert is extended, and vice versa, to maintain the tool in balance. In this embodiment, the travel of the first slide to back bore and generate is relatively large. Hence, for similar slides the movement of the second slide to offset the movement of the first slide is greater than would otherwise be required to bore the second diameter and clear the carrier when the tool is retracted.
Gifford David A.
Taylor John L.
Joint Production Technology Inc.
Sim & Mcburney
LandOfFree
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