Abstract: A process a plate workpiece with high precision at high speed, the plate processing machine comprises a workpiece side surface positioning device (SPD) provided with magnet rollers (MR); a workpiece trimming device (TD) provided with a tool actuating switch (SW); and a workpiece positioning device (PD) provided with an optical sensor (SE). The magnet rollers guide a workpiece forward in magnetic rotatable contact engagement with the side surface of the workpiece. The tool actuating switch is actuated before the workpiece is located at a trimming position for automatic trimming operation. The optical sensor generates a feed speed deceleration signal so that a fed workpiece will not apply shock to the stop member of the positioning device by adjusting the sensor position relative to the stop surface according to the workpiece length to be cut.

Abstract: A saw blade such as a bandsaw blade, circular saw blade, or backsaw blade has a pair of leading teeth which cut the workpiece and advance in a feed direction while the workpiece is being cut and a plurality of trailing teeth which cut the workpiece later than the leading teeth and serve to widen the leading cut channel. The leading teeth and the trailing teeth form one basic group in which the heights of the trailing teeth from a basic position on the saw blade are equal to or smaller than the height of the leading teeth. The trailing teeth are set in the right and left directions with respect to the saw blade and the leading teeth are slightly set with respect to the saw blade.

Abstract: In a die-height adjusting device of a mechanical press, a slide of the mechanical press is interlockingly connected to a prime mover through a slide actuating mechanism, and an extendible and contractible device for the adjustment of the die-height is provided at the part between the output end portion of the slide and the slide actuating mechanism supported by a frame. The extendible and contractible device is adapted to be adjusted and stopped in the extending and contracting direction thereof by an operating device for the extension and contraction adjustment. Said extendible and contractible device for the adjustment of the die-height comprises an extending and contracting mechanism and a clamp. Said operating device for the extension and contraction adjustment comprises an actuating means for the extending and contracting mechanism and a clamp actuating means.

Abstract: A high-speed axial-flow gas laser generator has a plurality of anodes radially provided at the inlet section of the laser tube, and a ring-shaped cathode is provided on the gas discharge section side of the laser tube. On the upstream side from the anodes, viewed from the laser gas flow in the laser tube, a nozzle is provided which imparts a spiral rotary motion to the gas flow in the laser tube.

Abstract: A saw blade such as a bandsaw blade, circular saw blade, or hacksaw blade has a leading tooth or teeth which cuts the workpiece and advances in a feed direction while the workpiece is being cut and a plurality of trailing teeth which cut the workpiece later than the leading tooth or teeth and serve to widen the leading cut channel. The leading tooth and the trailing teeth form one group in which a plurality of the trailing teeth are lesser in height than the leading tooth and an additional plurality of the trailing tooth are equal in height to the leading tooth. The trailing teeth are set in the right and left directions with respect to the saw blade and the leading tooth is unset with respect to the saw blade. The lateral set of the plurality of trailing teeth having a lesser height is wider than the lateral set of the plurality of trailing teeth having the same height as the leading tooth. Embodiments are disclosed in which a second group of teeth alternate with the basic group of teeth on the saw blade.

Abstract: A horizontal bandsaw has a main vise positioned slightly to the rear of the cutting location for gripping the workpiece during cutting, a material feed vise positioned to the rear of the main vise for feeding material into the cutting location, and a front vise positioned to the front of the cutting location. The front vise can move to a position to the rear of the cutting location to retrieve a small remnant of uncut material. The three vises each have a movable and a fixed jaw. A lower limit guide is provided on the main vise movable jaw which adjusts the descent of the cutting tool to the width of the workpiece. The fixed jaws are provided with means located within the operating area of the jaws for a slight advance or retraction of the contact face, to firmly grip the workpiece or to retract the contact face so as to prevent frictional contact with the workpiece. The movable jaws have a hydraulic cylinder built into a sliding tube for providing reciprocating motion.

Abstract: To generate a laser beam of significantly higher quality and high output power without damaging the output coupler (mirror), a novel stable optical laser resonator includes, in particular, a retro-reflector having an aspherical concave mirror for correcting intracavity wavefront aberrations induced when the laser beam travels through the lasing medium. The optimal surface constants of the geometry of the aspherical mirror are determined by an optical interferometry technique, an geometrical ray-tracing technique, and computer-aided ray tracing technique.

Abstract: To detect a line position described on a surface by a simple structure, the line position detecting apparatus comprises a light beam generator including a laser diode, a collimator, a prism, and a mirror; a motor for rotating a laser beam to describe a circular locus on the surface; an encoder for detecting a laser beam angular position; a photosensor for detecting a laser beam reflected from the surface; and a calculator for detecting an angular position at which light beam intensity changes due to the presence of the line at at least one point of intersection between the line and the circular locus and for calculating the point indicated by x-y coordinates on the basis of the diameter of the circular locus and the detected angular position of a line to be detected.

Abstract: In a plate processing machine such as punch press provided with a workpiece moving/positioning device (49) including a carriage base (53) movable in the longitudinal Y-axis) direction of the machine and a carriage (69) movable in the lateral (X-axis) direction of the machine, a carriage drive unit of an X-axis motor (79) and a reduction gear (77) for moving the carriage is disposed near a middle portion of the carriage base to balance the workpiece moving/positioning device, so that workpiece processing precision can be improved. Further, the width of a caterpillar table (82) fixed to the carriage base between two movable tables (81) also fixed to the carriage base is reduced to prevent vibration of the caterpillar table, so that scratches under the surface of a workpiece can be reduced.

Abstract: A gas laser generator comprises a frame, a gas channel through which a gas flows, a mirror for obtaining a laser beam, defining a resonant cavity, an anode electrode and at least two first and at least two second cathode electrodes arranged in the lower and the upper portions of the resonant cavity, respectively, and a power source, in which a first voltage of a first electric field between the first cathode electrodes connected to the power source through a first ballast resistance and the anode electrode and a second voltage of a second electric field between the second cathode electrodes connected to the power source through a second ballast resistance and the anode electrode are so determined that the former is smaller than the latter so that the current flowing in the first electric field may be substantially equal to the current flowing in the second electric field during the electric discharges between the electrodes.

Abstract: This invention discloses a system which automatically determines not only a distance from an object surface, but also an orientation of the device with respect to the object surface. This invention also discloses an arrangement of three or more position sensors for determining the orientation of the device, as well as the distance of the device from the object surface. Furthermore, this invention discloses a method of using parameter computation equations for determining the orientation and the distance of the device with respect to the object surface.

Abstract: The present invention relates to a method and device for cutting a workpiece made from a high chromium material such as stainless steel. The device comprises a processing head to irradiate and focus a laser beam onto a workpiece, a nozzle connected to the processing head for spraying and assisting gas onto the workpiece, a storage tank for storing a carbonate, and an orifice device for drawing carbonate from the storage tank so that it may be fed into the nozzle and sprayed onto the workpiece with the assisting gas. The addition of carbonate to the assist gas prevents excess dross from adhering to the cut surface of the workpiece.

Abstract: To eliminate defects such as burr, rollover, sags, scar, etc. from cut-off surfaces of a workpiece in a turret punch press, for instance, a novel height-different punch formed with a lower front edge, an upper rear edge, and an intermediate edge extending between the two edges is used for the punch press. While feeding the workpiece on a horizontal plane in a predetermined direction, the punch is struck by a striker at a first stroke so that the lower front edge thereof cuts off the workpiece partially in cooperation with a die; at the succeeding strokes so that the intermediate edge thereof cuts off the workpiece mincingly and curls refuse within a recess of the die; and at the last stroke so that the upper rear edge thereof cuts curled refuse away from the workpiece to complete a multistroke punching operation.

Abstract: A gas laser oscillator having a gas flow smoothing device, preferably made of a cylindrical mesh, installed in the gas inlet of the electrical discharge region of the oscillator.

Abstract: Method and apparatus for cooling a slab-geometry solid state laser medium wherein at least one of the front or rear surfaces of the laser medium is in contact with a glass cover, and a coolant is passed over the outside of the glass cover.

Abstract: A plate processing device for use in a machine with a vertically acting ram; has a guide device mounted on the frame and a guide member which is pressed to a sliding surface of the ram. The guide member freely rotates around the centerline of the first vertical shaft and also freely rotates around the centerline of the second shaft perpendicular to the first shaft and parallel to the sliding surface and is constructed so that it follows the sliding surface of the ram. Also, a back gauge for the work is buffered against the shock of abutment with the workpiece and may be backed away from the workpiece. A pressing plate for the workpiece is supplied by a high pressure and a low pressure plunger, which are vertically actuated to provide a noiseless operation.

Abstract: This invention relates to a multi-faceted reflector for use in pumping slab geometry solid state lasers. The present invention provides a multi-faceted reflector having a plurality of reflector segments which allow the reflector designer to alter the intensity profile along the longitudinal direction of the flashlamp without having to generate a continuous curve.

Abstract: The level of the working fluid in the work tank of an electrical discharge machining is controlled by a device located externally of the work tank. A vertically arranged cylindrical liquid level setting device is supported on the machine frame outside the work tank and is connected to the work tank by a tube. The liquid level setting device is vertically adjustable with respect to the frame by a manually operated shaft and link mechanism. In a second embodiment, an upper tank containing a supply of working fluid communicates with the work tank through a valve which is actuated by a float and limit switch to control the level of working fluid in the work tank.

Abstract: A solid state laser medium for use in a solid state laser oscillator uses a hollow cylindrical solid state laser medium which is formed cylindrically in order to improve the cooling efficiency of the laser. The laser includes a pumping device for exciting the laser medium and an optical resonator that is arranged on both ends in the axial direction of the laser medium. The pumping device includes a plurality of flash lamps that are arranged on the outside, with respect to the central longitudinal access of the laser medium, of the outer surface of the hollow cylindrical laser medium and an outer reflector that is arranged so as to enclose the flash lamps and the laser medium, from the outside, with respect to the central longitudinal access of the laser medium, of the flash lamps, and a cylindrical inner reflector with outer diameter which is slightly smaller than the inner diameter of the laser medium, the inner reflector being inserted in the cavity of the laser medium.

Abstract: A method of and apparatus for recognizing the figure pattern of parts used in factories is disclosed in which a pattern input device, such as an ITV camera creates an electrical image of the part which is A/D converted and then stored in binary coded form. The binary coded data is then processed and compared to known stored values, using one or more characteristics of the figure pattern, to determine the identity of the viewed part.