Abstract: A tool turret mechanism is for use with a machine tool having a rotatable workpiece spindle. The axis of the turret is at a small acute angle to the axis of the workpiece spindle for tool clearance and the turret has first and second surface portions mounting first and second pluralities of OD turning tools and ID turning tools, respectively. The two pluralities of tool mounting surfaces are generally in the same plane. The plurality of OD turning tool mounting surfaces is in a plane which intersects the ID tool mounting surfaces. The turret is asymmetric in that the spacing angles between the OD turning tool mounting surfaces are less than the spacing angles between the ID turning tool mounting surfaces, thereby permitting a greater number of tools to be mounted on a given size turret, and giving greater flexibility in permitting first given numbers of OD and ID tools or, alternatively, a greater number of OD turning tools and a lesser number of ID turning tools.

Abstract: A workpiece holder for the centered holding of annular workpieces, for working one of the circumferential faces of the workpieces, the holder including a basic element having a generally cylindrical support surface, a plurality of segments which are distributed around the circumference of the cylindrical support surface for radially clamping the workpieces individually, and an elastic support member connecting the segments to the basic element.

Abstract: An elongated can body blank moves axially and is supported in part on a traveling interior mandrel. Traveling with the mandrel and elongated blank is a typical knife carriage having a plurality of knives mounted thereon for cutting the body blank into a plurality of individual can bodies. The improvement is a pivoting retainer member mounted on the knife carriage that functions to engage the open end of the axially moving can body blank rotating therewith and functions to precisely position the entire length of the blank with respect to the cutoff knives.

Abstract: A machine tool for maching of crankpins on crankshafts, or of similarly ts-axially offset portions of other types of workpieces, includes an arrangement for indexing the workpiece to a plurality of different positions to place new crankpins in position for machining without having to unclamp the workpiece or stop its rotation. Indexing accuracy is greatly improved and all indexing-related operations are powered by the prime mover of the machine tool rather than requiring separate drives.

Abstract: A numerically controlled, dual-turret lathe includes a pair of indexing turrets mounted on respective cross slides which in turn are slidably mounted on respective saddles for movement in the transverse direction of the lathe, the saddles themselves being mounted on a lathe bed for sliding movement in the longitudinal direction of the lathe. The turrets have mounted thereon a cooperative pair of gripper pawls capable of releasably holding work therebetween. As dictated by a prescribed program a numerical control system controls the movements of the cross slides and the saddles so as to cause the gripper pawls to carry the work from a preassigned standby position on the lathe bed into the chuck on the work spindle of the lathe, preparatory to the machining of the work by tools carried by the turrets.

Abstract: This invention relates to an indexable broadnosing cutting insert for use in boring and broadnosing applications, especially where a floating type of boring head is required. This insert, preferably, has a triangular-like shape. Each side of this triangular-like shape actually being made of three angularly related faces: a forward lead clearance face, a middle clearance face and a rear relief face. The forward lead clearance face and the middle clearance face are joined to the top face of the insert by a narrow, vertical wiper face.

Abstract: In a workpiece supporting device for supporting a workpiece, a holding shaft carrying at its one end a center member adapted to support one end of the workpiece is slidably received in a housing. A hydraulic cylinder is formed in the housing and a sleeve member is rotatably mounted on a piston rod of the hydraulic cylinder with a connecting member being threadedly engaged with the sleeve member. A spring is adjustably interposed between the holding shaft and the connecting member and relative axial movement between the holding shaft and the connecting member is limited within a predetermined distance.

Abstract: An improvement in bar feeding mechanisms is disclosed. The bar feeding mechanism which comprises a plurality of roller assemblies disposed on a frame has an adjustable stop for limiting the movement of the rollers toward the axis of the bar being fed. The mechanism is especially advantageous for irregularly shaped bars.

Abstract: A cutter insert presenting eight positive cutting edges has a generally rectangular prismatic configuration to permit its securement in a tool holder having a conventional square insert-receiving pocket. The insert has a pair of opposed primary faces, and four rectangular side faces each having a pair of coplanar, flat lands in opposite corners thereof to permit positive location and clamping of the insert. Each side face also has a laterally opposed pair of positive beveled facets formed therein and intersecting the respective primary faces to define neutral cutting edges for the insert. An elongate groove extends intermediate the beveled facets of each side face parallel to the neutral cutting edges and functions as a chip breaker to provide freer cutting and better chip control. In preferred forms, a square pocketed tool holder is complementally configured to advantageously support the cutter insert in a manner to present a negative angle of attack at the work surface.

Abstract: An indexable finishing insert is disclosed formed from a flat wafer of cutting material having front and rear planar rake surfaces and a plurality of edge faces disposed therebetween. The rake faces are generally of equilateral, polygonal configuration with the side edges thereof corresponding to the cutting edges of the insert. The cutting edges are arcuate and have a radius of curvature several times greater than the width of the planar surfaces. The intermediate portion of each edge face is substantially planar and defines a locating land for facilitating the mounting of the insert within the pocket of a milling cutter. At least a portion of the opposed ends of each edge face is curved and sloped away from the front rake surface in order to provide clearance along the edge faces when the insert is mounted on a cutting tool at an angle between the rake surfaces and the workpiece.

Abstract: A countersinking tool comprising a holder with at least two removable cutting inserts for countersinking relatively large holes. The holder has a locating recess and a seating surface for each insert, and is cut away at various parts to facilitate the countersinking operation. The inserts may be cut away at one part to facilitate the mounting of a plurality of inserts on the holder.

Abstract: The present invention relates to a machine and method for slitting elongated rolls of web material rolled upon a tubular core utilizing a circular double edged knife blade in combination with a circular saw blade. Both blades are rotatably mounted within a rigid common carriage. The carriage is mounted for movement parallel to the axis of the elongated roll to a plurality of cutting locations along the length of the roll and for movement in a cutting stroke perpendicular to the axis of the elongated roll. The machine and method of the present invention may also utilize a separate knife blade to cut the core of the roll.

Abstract: A toolholder is disclosed having a tool body with an insert seat thereon and an expansible shank capable of being received in the bore of a tool support member. The expansible shank is capable of being rapidly and securely locked into the bore of the tool support member by reciprocally movable means mounted in the tool body for expanding and contracting said shank.

Abstract: An automatic feeder for multi-mandrel lathe is disclosed. The feeder comprises as many channels as the mandrels, each of which controlled for opening and closing by lever systems, and provided with bar pusher.

Abstract: A plurality of cutting plates are mounted in a recess forming a mouth at one end of a drill bit and each cutting plate has a plurality of cutting edges. The drill bit mouth provides chip removal. In the cutting position, the cutting plates are arranged in a plane extending in the direction of the axis of rotation of the drill bit and the cutting edges are arranged in a step-wise manner. The cutting plates can be turned for arranging different ones of the cutting edges in the cutting position. The cutting plates extend radially outwardly from the axis of rotation with one plate adjacent the axis of rotation and the at least one other plate extending radially outwardly from it. The cutting plates have a parallelogram shape in the axial plane of the cutting position. In the cutting position, cutting edges of the cutting plates are in parallel relation to one another with adjacent parallel cutting edges on adjacent cutting plates being in contact with one another.

Abstract: A rotary cutting blade assembly for removing rubber tread material from a pneumatic tire carcass prior to texturizing and finishing the tire carcass for retreading includes a cutting wheel rotatably mounted on an arbor. The cutting wheel includes a plurality of pockets adapted to receive and mount a plurality of cutting blades, which blades present an angular cutting edge which engages the tread material on the tire carcass substantially parallel to the carcass to slice and to remove the tread material from the carcass.

Abstract: The device is primarily designed to be used with vertical milling machines. This device may also be adapted to any machine tool spindle which uses an internally tapered end to hold the tool holder, collets, etc. etc. Due to the fact that this mechanism functions internally, it does not take away any of the machine's capabilities and no modifications are required to the existing spindle. Basically the device is composed of two major parts: the chuck that goes keyed inside the spindle and the air cylinder which is disposed on the side axially opposite from the chuck and fixed to the body of the machine. The chuck has an axially disposed plunger, a compression spring and two sets of spheres connected by a set of pins. The plunger is shaped to force radially outward a first set of spheres which in turn activates a second set of locking spheres to cause them to move radially inward and engage the tool holder.

Abstract: A boring tool comprising a tool head provided with a slot extending transverse to the axis of the tool head in which a pair of opposite cutting knives are guided movable in longitudinal direction of the slot. A spacer is guided in the tool head movable between a first and a second position. In the first position the spacer is located between inner ends of the cutting knives which are spring biased to engage the spacer to be movable with the latter in the longitudinal direction of the slot while holding the cutting knives in a cutting position. In the second position the spacer frees the cutting knives to move under the influence of the biasing springs toward each other to an inactive position.

Abstract: Machining apparatus for machining a workpiece with a work-performing tool comprising a frame on which a tool carrier is mounted for reciprocal movement toward and away from the workpiece and a feed unit for moving the tool carrier between a partially retracted position and a fully retracted tool change position and for moving the tool carrier from the partially retracted position reciprocally through a machining stroke to machine a workpiece. The feed unit includes a drive transmitting assembly which is reciprocally mounted on the frame and which comprises extensible and contractible means connected to the tool carrier. A first drive means reciprocates the drive assembly while the extensible and contractible means remains fixed so as to move the tool carrier reciprocally through a machining stroke and a second drive means actuates extensible and contractible means to move the tool carrier between its partially and fully retracted positions.

Abstract: A can end trimmer has a main rotary support shaft with a radial turret plate. A plurality of self-contained cutter unit cartridge assemblies have radial head flanges directly connectable to one side of the turret plate with driven members in each cutter unit cartridge automatically engaging control members mounted on the turret plate for effecting movement of a transversely shiftable cutter knife into engagement with an axially fixed cutter knife for effecting rotation of both knives to trim the end from a can held in a vacuum chuck. A shim between the cutter unit cartridge and the turret plate cants the axes of the knife members with respect to the can by a very small amount normally less than 2.0 degrees to effect a smooth burr-free cut of the can end. Stripper pin means surrounds the can being cut which in turn surrounds the axially fixed knife with a reciprocating stripper plate on the pins being easily removed during replacement of the cutter cartridge unit.