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 hole drilling method includes a rotating step of attaching a workpiece to a rotary table to make the workpiece rotate in an opposite direction to the rotating direction of the rotary tool and a drilling step of making the rotary tool and the workpiece move relative to each other in a direction in which they approach each other so as to drill a hole. The hole drilling step comprises making a position of the rotary tool track the rotation of the workpiece while drilling the hole so that the rotary tool is arranged at a position for drilling a hole in the workpiece.

Abstract: A compact, multiple spindle computer-controlled machine tool is disclosed. The machine may have a spindle base with two spindles disposed vertically relative to one another along an axis, the spindles having parallel axes of rotation. The spindle base may be computer controlled and have z and x axis motion relative to a tool post. The tool post may have a tool turret and may provide computer-controlled y axis motion so that the tool turret may be utilized with both spindles. The tool post may also have a machining unit that may be used to machine workpieces held by either spindle.

Abstract: A radial drilling device (1) for a lathe (5) for radially piercing a turning part (4) supported by the lathe. At least one drill bit (2b) is supported by a mobile drilling jaw (3a, 3b) in a transverse orthogonal plane to the axis of rotation of the part (4) to be drilled. A principal revolving drilling set (ERP) carries the drilling assembly and causes the drilling assembly to rotate around the longitudinal axis of revolution of the part (4), at the same rotational speed as that of the part (4) which is to be drilled.

Abstract: A radial drilling device (1) for a lathe (5) for radially piercing a turning part (4) supported by the lathe. At least one drill bit (2b) is supported by a mobile drilling jaw (3a, 3b) in a transverse orthogonal plane to the axis of rotation of the part (4) to be drilled. A principal revolving drilling set (ERP) carries the drilling assembly and causes the drilling assembly to rotate around the longitudinal axis of revolution of the part (4), at the same rotational speed as that of the part (4) which is to be drilled.

Abstract: A drill bit for drilling holes around the corner of a workpiece is provided with a single rounded continuous cutting edge with radiused upper and lower corners to permit free rotation of the cutting head as it is urged along an arcuate path. The bit is of a unique two piece construction permitting selective materials to be utilized in the shank an cutting head portions.

Abstract: A rotary drilling machine for forming holes of selected size and spacing in continuous strip material such as elastomeric gasket stock used for the manufacture of gaskets for door openings and the like. This machine has a rotary drum unit which carries the strip material along a portion of its peripheral edges. A plurality of drilling units are mounted on this drum unit so as to move with the strip material. The drilling units are oriented toward the peripheral edge, and these drilling units are moved radially in a proper sequence whereby drill bits thereof move toward the strip material to dril the holes and then retract. Tensioning elements produce friction between the strip material and the periphery of the drum unit to accomplish the movement thereof in unison. The tensioning elements, in a preferred form, have signal generating elements whereby the speed of rotation of the drum unit is controlled to prevent sag in the run of the strip material.