| 摘要 |
The invention contemplates a tool for slitting a tubular work piece of substantially constant cross-section, particularly for work pieces of relatively large bore diameter. To this end, a forwardly cantilevered frame includes elongate shoes or rails for retaining and supporting the bore of the work piece, at angularly spaced locations. At one or more of these locations an elongate guide serves a cutter slide or shuttle, there being two such guides or shuttles for the situation in which a cylindrical tube is to be severed (or substantially severed) into semi-cylindrical halves. The coordinated reciprocating feed of the slides is so synchronized with actuation of the cutter elements carried thereby that the slitting cut is made only during one stroke, the return stroke, of the slide-actuating cycle.
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