Abstract: Methods and devices for milling a channel-shaped cavity by a five-axis computer numerical control (CNC) machine by selecting a workpiece to be machined, determining cutting tool flow along the channel-shaped cavity, determining cutting tool in-depth penetration, determining a trochoid path, and determining auxiliary movements.

Abstract: A tool (100) for working the internal bore of a tube comprises a motor (10), having a housing with a rotary output; a housing sleeve (14a) and shaft (22); a first bearing housing (16), having a rotatably journalled first spindle (102), mounted on the housing sleeve; and an end sleeve and shaft connected to a tool head. The motor output drives, along a common axis (1), the housing shaft, first bearing spindle, end shaft and tool head. A change mechanism (56,58) is in the tool head to change direction of said drive to transverse said common axis. An output (60) is adapted to receive a tool bit. Gauge means (18,18?) is disposed on said tool head and is adapted, in use, to bear against the bore of the tube and maintain the tool head located radially with respect to the tube axis; and support means (24,24?) is disposed on one or more of said housing shaft, first bearing housing and end sleeve adapted, in use, to bear against the bore of the tube and support the tool.

Abstract: A circuit device for interconnecting first and second multilayer circuit boards is described herein. The first multilayer circuit board may include a first plurality of electrically conductive vias of varying depths and the second multilayer circuit board may include a second plurality of electrically conductive vias. The circuit device comprises a first plurality of pins located on a first side of the circuit device corresponding to the first plurality of electrically conductive vias of the first multilayer circuit board, each pin having a length compatible with a depth of a respective one of the first plurality of electrically conductive vias of the first multilayer circuit board. The circuit device further comprises a second plurality of pins located on a second side of the circuit device corresponding to the second plurality of electrically conductive vias of the second multilayer circuit board.

Abstract: A method and apparatus has been developed for metal cutting machine using a cutting die tool that pivots as it cuts a metal workpiece. By pivoting the cutting tool, the orientation of the metal surface being cut in the workpiece may be varied along the cutting path. A particular application of the invention is for screw metal cutting machine, e.g., a Swiss-type screw lathe, that cuts screw threads in screw blank rods, such that the threads have a variable cant along the length of the screw. The cutting die tool is mounted in a tool holder that is pivoted by a computer controller in accordance with machining instructions for the screw or other device being machined.

Abstract: A precision drill for drilling noncircular bores, comprising a drill bit on a shaft and a holder for the workpiece being drilled, for providing a drill that can operate economically at high speeds. The workpiece holder oscillates translationally in at least one direction at a frequency controlled by the speed of the drill bit, and moves along a path determined by the desired shape of the bore to be drilled.

Abstract: A relief thread grinding machine for making screw taps wherein a workpiece 10 is clamped to a resiliently mounted body 5 of a longitudinally adjustable sled 1. The body carries a follower wheel 17 which bears on a cam roller 15 rotatably mounted on the sled. The surface of the cam roller is eccentrically lobed so that when it is axially moved varying oscillation strokes of the body 5 are produced. The cam roller can be axially adjusted as needed during the grinding process so that the amount of relief grind can be changed. In this manner it is possible to provide the conical thread on the lead end of a tap with a different relief grind than the generally cylindrical and posteriorly weak conical thread on the guide end of the tap.