| 摘要 |
<p>Machining systems (10, 20, 30, 40, 50, 60, 70, 90; figs 1-9) and methods of their use for material treatment or removal within a member (T) are disclosed. Each system has a spindle (12) powered by a motor (17, 17' '; figs 1-3 & 9) or motors (17a & 17b; figs 4-7) positionable within the member (T) during operation. To provide increased resistance to torsional cutting forces a preferred embodiment (90; fig. 9) includes two concentric pipe members (95, 94), one of which (94) is rotated by an actuating mechanism (110A, HOB or HOC,- figs 1OA, 1OB and 10C) to prestress the other (95). Another preferred embodiment (fig. 9) includes a steady support (9' ', 18; figs 9 or A9) to support the system (90) in the member (T). A control system (42, 43a, 43b; fig. 4) including a sensor (43a, 43b) and control mechanism (42) can maintain the spindle (12) at the required speed. The machining system may be used for machining helical grooves (84; fig. 8), in a tube or pipe (T) in order to manufacture a stator (80; fig. 8) for a down-hole motor.</p> |
