Abstract:
The invention relates to a threading machine having a rotating threading head (1) that can be displaced in the direction of the axis of rotation (1a). Said device also has tool sliders (3a, 3b) disposed in pairs opposite each other and radially displaceable in relation to the axis of rotation, said sliders having tools (13, 14). Said device further includes a drive organ (2) rotating along with the threading head and displaceable in the direction of the axis of rotation. A movement of said drive organ in relation to the threading head in the direction of the axis of rotation brings about a radial movement of the tool slider.
Abstract:
A vibration assisted tapping device includes an elastic frame for translating axial vibration to a vibration having both axial and torsional components. The elastic frame has flexural members that connect an upper plate to a lower plate with a vibratory actuator preloaded therebetween. The flexural members are inclined relative to an axis of the frame in a direction calculated to result in translated vibration substantially aligned with the lead angle of the thread being cut. Also disclosed is an automated system for applying different vibration patterns to the tap/workpiece interface during tapping and for recording the tapping torque associated with each vibration pattern. The disclosed system permits identification of the vibration frequency and amplitude that results in the greatest reduction in tapping torque. The automated system may be configured as an adaptive machine tool to first identify and then apply the optimum vibration pattern.
Abstract:
A vibration assisted tapping device includes an elastic frame (80) for translating axial vibration to a vibration having both axial and torsional components. The elastic frame (80) has flexural members (14) that connect an upper plate (12) to a lower plate (16) with a vibratory actuator (50) preloaded therebetween. The flexural members (14) are inclined relative to an axis of the frame in a direction calculated to result in translated vibration substantially aligned with the lead angle of the thread being cut. Also disclosed is an automated system for applying different vibration patterns to the tap/workpiece interface during tapping and for recording the tapping torque associated with each vibration pattern. The disclosed system permits identification of the vibration frequency and amplitude that results in the greatest reduction in tapping torque. The automated system may be configured as an adaptive machine tool to first identify and then apply the optimum vibration pattern.
Abstract:
A system for adapting existing conventional screw machines to be capable of computer numeric control (CNC). The system incorporates the use of a VersaCam device (12) which replaces the turret cam of a single spindle screw machine (10). The VersaCam system monitors the motion of the screw machine camshaft and actuates the turret slide in synchronization with the camshaft. The VersaCam system also provides a means of specifying the desired turret slide trajectory for any given job.
Abstract:
A die head retaining mechanism for installing or removing a die head (301) in a power drive (300) for thread cutting operations features a chuck with simultaneously-acting locking jaws (230), moving radially, the jaws movement actuated by substantially spiral grooves (276) acting as cam profiles. A face gear (220) has at least the locking jaws (230) disposed in a slot (225) provided on the face of the face gear oriented away from the housing (310). The mechanism also comprises a drive ring (270) having a collection of cam profiles (276) to control the movement of the locking jaws (230). The mechanism also comprises at least one compression spring (250) disposed in a corresponding groove (222) on the face gear (220). The compression spring (250) is preloaded to keep the locking jaws (230) in a locked position. The mechanism also comprises a bearing (240) between the housing (310) and the face gear (220). The bearing (240) is locked in place by a retaining ring (260). A locking plate (280), spring washers (290), and screws (294) are used to secure the assembly of the die head retaining mechanism on the power drive (300).
Abstract:
The inner/outer surfaces of a hollow member whose inner/outer surfaces have non-circular curves are machined with high precision at high speeds. The cycle-machining device has a C-axis driving means (54) by which the hollow member is supported at both ends and turned, inner surface machining driving means (98), and an outer surface machining driving means (78), both of which drive linearly an inner surface cutting tool and an outer surface cutting tool respectively in the U-axis and X-axis directions, wherein the X-axis and the U-axis are synchronized with the rotation angle of the C-axis so as to cut the inner/outer surfaces. The cycle machining device further has a position command value output unit (103) which outputs the position command values of the X-axis and U-axis synchronously with the C-axis at the time of actual machining, X-axis and U-axis position deviation calculating units (110, 120) which calculate the respective position deviations, X-axis and U-axis learning control unit (111, 121) which learn correction command values with which the respective position deviations are reduced to zero, store them, and output them synchronously with the C-axis, and X-axis and U-axis adding units (112, 122) by which the correction command values and position deviations of the respective axes are added to each other, and the addition results are outputted as speed commands to the inner surface and outer surface machining driving means.