| 摘要 |
PROBLEM TO BE SOLVED: To provide a tool rest for an underfloor wheel lathe that is improved in rigidity and mounted with a plurality of tools capable of indexing so as to ensure wheel cutting under optimal cutting conditions, chip cutting into a proper length, and smooth chip discharge. SOLUTION: The tool rest 5 comprises a tool rest body 12 disposed under a wheel 1 for movement in a Z-axis and an X-axis direction relative to the wheel, a turret 21 disposed on the tool rest body 12 for revolving indexing about an indexing axis inclined forty-five degrees against the X-axis, and provided with a plurality of tool mounting parts 20 where first and second tools 9a and 9b are mountable, and an indexing mechanism disposed between the tool rest body and the turret to revolve the turret and index desirable tools 9a and 9b in a machining position P. When the desirable tools are indexed in the machining position, the desirable tools offer cutting work on a wheel portion 7, while the tools other than the desirable ones are put in positions wherein they are kept out of interference with a drive roller 6 and the wheel.
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