Abstract: A linear broaching machine for machining rotating parts wherein a plurality of tooling carriages are mounted upon a moving chain and broach type tools are supported by the carriages wherein the tools are moved in a linear path into engagement with a rotating workpiece to remove metal from the workpiece and form an accurately sized cylindrical surface concentric to the workpiece axis of rotation. The tool carriages are spaced from each other providing non-machining access durations wherein the workpiece may be loaded or unloaded from its rotating support spindles.

Abstract: Broach pulling apparatus which eliminates play and backlash during the broach operation. Jaws carried by the broach pulling spindle engage the broach in a manner to impose axial forces thereon in opposite directions to eliminate lost motion and clearances between the spindle and the broaching tool during cutting and alignment.

Abstract: A quick release tool holder system for machine tools utilizing a plurality of rotatable tool spindles spaced about an axis located on a tool head. Each tool spindle utilizes an axially movable sleeve for operating a detent locking a standard tool adapter within the spindle socket, and an actuator plate reciprocable by an expansible chamber motor simultaneously displaces the spindle sleeves in a tool adapter releasing direction to facilitate tool replacement.

Abstract: The invention pertains to a multiple spindle machine tool wherein a plurality of substantially parallel spindles transversely disposed to a workpiece transfer path permit sequential operations upon a workpiece transferred from spindle to spindle. Spindles may be mounted upon opposite sides of the transfer path permitting machining on opposite sides of a workpiece, and the machine tool permits successive operations to be performed sequentially, rapidly and economically.

Abstract: A crankshaft lathe of the single spindle pin type capable of universal use with a variety of types of crankshafts. The lathe includes a single tool support mounted upon ways for movement both perpendicular and parallel to the workpiece axis. A single drive motor powers both workpiece rotation and tool movement through an indexable connection wherein the relative angular relationship between workpiece and tool drive is adjustable. Automatic controls permit the lathe to individually machine the pins sequentially of a multiple pin crankshaft.

Abstract: The invention pertains to the method and apparatus for machining crankshaft bearing and cheek surfaces wherein the cheek surfaces are turned by tungsten carbide tools in a dry-cutting operation and the bearing surface is turned by high-speed steel tools. The cheek and bearing machining is sequentially performed, the rate of crankshaft rotation and rate of tool movement during cheeking being considerably higher than during bearing machining, and the carbide and high speed tools are mounted upon a common tool carrier shiftable between two operative positions to permit the sequential turning operations to be rapidly sequentially performed during a single translation of the slide upon which the tools are mounted.

Abstract: Headstock and tailstock chucking apparatus for crankshaft machine tools, such as lathes and grinders, utilizing a centering hole defined in the crankshaft workpiece end for axially locating the workpiece relative to the machine, and the machining tools. The stock spindle chucks utilize a center engaging a previously located and dimensioned workpiece center to axially position the workpiece, which is biased into firm engagement with the center prior to chucking. The chuck center and workpiece is axially located and spindle motors reciprocate chuck actuating mechanism sequentially producing axial locking and radial chucking of the workpiece. Further, automatic limit switch positioning apparatus is employed to automatically position machine limit switch controls in accordance with workpiece dimensions and quill location.

Abstract: Apparatus for transferring internal combustion engine crankshafts from a conveyor system to crankshaft machining apparatus capable of automatic functioning. The apparatus includes an overhead track having a translatable carriage mounted thereon and a crankshaft holder depends below the carriage having a pivoted jaw for gripping a crankshaft. A power driven drive shaft mounted on the carriage raises and lowers the holder through an eccentric connection therewith, and the eccentric pin includes a radially movable slide to which a jaw actuator mounted in the holder is connected. The slide includes a cam follower engaging a grooved cam track wherein rotation of the drive shaft produces relative displacement between the jaw actuator and the crankshaft holder during vertical displacement of the holder moving the jaw between holding and release positions during rotation of the drive shaft.