Abstract:
Improved chucks are provided for securing a cutting element to a power driving unit. The improved chucks are easy to manufacture and do not require mechanical aptitude or great manual dexterity in order to securely connect the cutting element to the power driving unit. These chucks may be used in combination with various power drive units such as power drills, drill presses, routers, lathes and milling machines, rotary sanders and grinders and other rotating cutting elements.
Abstract:
A tapered drawback collet which engages a conically tapered collet chamber in chuck body. A collet extension is axially displaced through high reduction gearing including a worm gear and threaded feed ring acting on a sleeve having only axial contact with the collet extension and therefore is free of any radial loading.
Abstract:
An improved tool holder for a metal removing machine includes a generally cylindrical head having a longitudinal passageway formed co-axially therethrough. The outer cylindrical surface of the head includes means for supporting one or more cutting tools thereon. The inner surface of the passageway formed through the head includes a threaded intermediate diameter portion and a relatively smaller diameter portion. An insert ring is disposed within the passageway at the junction of the intermediate and smaller diameter portions of the passageway. The insert ring includes a ramp surface which provides a smooth transition from the intermediate diameter portion to the relatively smaller diameter portion. A generally hollow cylindrical collet is provided which is sized to fit within the threaded intermediate portion of the passageway. The collet includes an enlarged end portion having a first chamfered edge adapted to abut the ramp surface of the insert ring when the collet is inserted in the passageway. A threaded hollow cylindrical shank is provided to retain the collet within the head. The external surface of the shank is threaded to cooperate with the threaded intermediate portion of the passageway. A longitudinal passageway is formed co-axially through the shank having a chamfered shoulder adapted to abut a second chamfered edge of the enlarged end portion of the collet when inserted within the passageway. Rotation of the shank within the threaded passageway causes the shank and the collet to be advanced longitudinally therethrough until the collet engages the ramp surface of the insert ring. A drill bit may be inserted through the head passageway into the interior of the collet. Further rotation of the shank causes the enlarged end portion of the collet to be compressed, thereby frictionally retaining the drill bit within the head.
Abstract:
The disclosure relates to a tool changing mechanism comprising an arm with hands at each end thereof having means to pick up both boring and turning tools. The arm is actuated by hydraulic rotary actuators and the tools are gripped by air operated fingers. A turret assembly is equipped with a boring tool holder and a turning tool holder for the acceptance of tools changed by the changing mechanism.A magazine holds replacement boring bars and turning tools until a tool change is required. An automatic tool lock-unlock mechanism is provided to lock the tools in cutting position.
Abstract:
A high speed machine tool spindle assembly for firmly retaining a cutting tool therein, notwithstanding machine tool vibration, includes a spindle having an axially extending bore therethrough. Integrated to each end of the spindle is a tool gripping collet, each collet being urged radially inward against the shank of a cutting tool disposed in the spindle bore by a respective one of a pair of collet nuts which each threadedly engage the spindle adjacent to a separate one of collets at each spindle end. Each of a pair of collet nut drivers is carried by the spindle adjacent to a separate one of the pair of collet nuts and each is slidable along the axis spindle to jointly engage a separate one of the pair of collet nuts and the spindle. Vlier screws are threaded into the spindle adjacent to each collet thereon and extends radially from the spindle to engage a separate one of the collet nut drivers to restrain each collet nut driver from axial movement after each is moved to jointly engage a collet nut and the spindle.
Abstract:
An improved collet and collet fixture provides an adjustable height for a work piece held in the collet so that the work piece may be held at the proper height. The collet is locked in position from the bottom by the fixture, thereby providing a secure location and holding of the collet and accurate machining of the work piece.
Abstract:
A collet chuck assembly includes a locknut and a nose ring that have confronting bearing races with a series of bearing elements therebetween, the nose piece and the collet having a line of engagement, and loose fitting threads enabling the line of engagement to find its own location.