Abstract: An internal pull broach is disclosed for roughing, semi-finishing and finishing at least one wall in a workpiece during a single stroke machining operation. The broach includes an elongated cutting tool holder having a longitudinal axis and a plurality of laterally extending, longitudinally spaced pockets. Cutter inserts are disposed in each of the pockets to define a plurality of sequentially acting protuberances. Each protuberance has a cutting edge extending laterally with respect to the longitudinal axis of the tool holder substantially across an entire width of the tool holder for progressively cutting into the wall of the workpiece sequentially as the tool holder moves during the single stroke along a fixed path coaxial with the longitudinal axis of the tool holder.

Abstract: A coupling structure includes a coupling member having a cylindrical, axially slotted end with a cylindrical opening extending therethrough and perpendicular thereto having an axis of generation parallel to the sides of the slot and including a conical surface, a conical member within the opening having a conical surface in contact with the opening's conical surface and threaded structure for axially adjustably securing the conical member in the opening. A tapered liner may surround the slotted end of the coupling member and a threaded insert may be provided over one end of the opening for receiving an end of the conical member. One embodiment includes one conical surface in the opening and one conical member provided within the opening. A second embodiment includes two separate conical surfaces in the opening along with two separate conical members in opposite ends of the opening connected by and axially adjustable along a liner member.

Abstract: A rotatable cutting tool for cutting a spherical seat carries a plurality of indexable cutting inserts at the front end of the cutter body. The inserts are located in pockets and retained in the pockets by respective retainer members mounted on the body and overlying the exposed face of the insert. A reduced diameter section at the rearward end of the cutter body is dimensional to be rotatably received in a bore extending through a plate-like hanger. A retainer plate is cooperable with headed cap screws projecting from the rear end of the reduced diameter section of the body to constitute a quick disconnect coupling for rapid mounting and dismounting of the cutter upon its hanger. The cutting edges of the inserts lie in respective axial planes offset forwardly, with respect to the direction of rotation of the tool, from the axis of rotation and angularly offset from each other by unequal angles.

Abstract: A cutting tool having a main body with a longitudinal axis and one or more slide receiving slots. A cutter carrying slide is slidably received within the slide receiving slot in the body for sliding movement relative to the body along a first slide path extending generally normal to the longitudinal axis. A slide positioning member is provided for shifting the cutter carrying slide along the slide path between a retracted position and a cutting position. An anti-backlash device is also provided for establishing and maintaining firm contact between opposing surfaces of the slide and the slide positioning member during movement of the slide toward the cutting position. The anti-backlash device increases force urging the opposing surfaces into contact with each other as radial displacement increases between the slide and an axis of rotation.

Abstract: A machine tool and method for simultaneously boring, facing and back boring three bores in a differential carrier with three tools that rotate coaxially with their spindle axes. Each tool has a first slide at its free end that carries a first cutting insert for back boring a first diameter and then generating a radial face that serves as a bearing seat on the differential carrier. Each tool also has a second slide carrying a second insert for boring a second diameter. The construction, arrangement and movement of the two slides are correlated with each other to maintain the tool in balance during extension and retraction of both slides. In the preferred embodiment the first insert must be retracted when it is advanced into the carrier, extended to back bore and then retracted to generate a radial face. The second insert is at the same location circumferentially of the tool. One insert is retracted while the other insert is extended, and vice versa, to maintain the tool in balance.

Abstract: Adapter structure for and method of securing a draw bar actuated tool to a spindle having an actuating draw bar extending therethrough. The structure includes coupling members for securing the adapter structure to the actuating draw bar and to the tool draw bar and structure permitting relative rotation between the tool and spindle with the actuating draw bar and tool draw bar securely engaged. In one embodiment, the adapter structure is entirely separate from the tool while in another embodiment, the adapter structure includes a modified tool and tool draw bar.The method of the invention includes the steps of securing a tool including a tool draw bar therein to an actuating draw bar extending through a spindle, rotating the tool and tool draw bar with respect to the actuating draw bar to align securing means on the spindle and tool without relative axial movement between the draw bars and subsequently securing the tool to the spindle.

Abstract: Generating head structure including a generally cylindrical housing having a bore extending therethrough axially of the axis of generation thereof, a slide positioned across the bore at one end of the housing, keeper plates secured to the housing at the one end thereof for providing a slideway for said slide to move transversely of the axis of generation of the housing, a drawbar extending into the other end of the housing through the bore therein, and a cam key acting between the drawbar and slide for moving the slide transversely of the housing on axial movement of the drawbar within the bore, which cam key is provided with a cylindrical pivot portion, and a generally rectangular portion having beveled opposite corners whereby the cam key is self aligning in a slot in one of the drawbar and slide.A lubricating fitting is also provided extending into the housing and the slide is provided with lubricating grooves in the surfaces thereof.

Abstract: Boring bar structure including an adapter having an axis of rotation, an eccentric bore through said adapter having a longitudinal axis parallel to but offset from the axis of rotation of the adapter, adapter spline structure in one end of the bore concentric with the bore, a cylindrical boring bar body having concentric spline structure on one end thereof adapted to mesh with the adapter spline structure in adjusted relative angular positions, the one end of the boring bar body being adapted to fit within the eccentric bore in the adapter with the spline structures in mesh, whereby a cutting tool secured to the other end of the boring bar body may be adjusted radially of the axis of rotation of the adapter on axial movement of the boring bar body within the eccentric bore in the adapter and relative angular movement of the adapter and boring bar body and subsequent meshing of the spline structure with the adapter and bar in a different angular relation.