Abstract: A laser processing unit includes a torch that is automatically mounted on a processing head. The torch has an assist gas chamber and a balance chamber, and the assist gas is supplied to the chambers. Constantly, equal pressures act on the both chambers, and an upward first force and a downward second force that act on a lens holder offset each other because pressure reception areas are equal. Gas is supplied to a gas spring chamber to provide a constant upward force to the lens holder. A driving device has an arm driven by a servomotor. The arm is in contact with a pin and the lens holder is moved to a predetermined position for automatically adjusting a focus position FC of a collective lens.

Abstract: There is provided a three-dimensional laser beam machining apparatus for a long workpiece, which includes an automatic loading device for a large variety of materials that feeds materials to a three-dimensional laser beam machine. The automatic loading device 100 for a large variety of materials has a bundle type material loading device 120. A bundle type material W1 is a round pipe or a polygonal pipe, and the posture thereof around the axis line is aligned automatically when the material is conveyed by a roller conveyor 140. The front material stopped by a stopper 150 is sent out to an inclined conveyor 180 over the stopper 150 by means of a swing arm 170. The bundle type material as well as a versatile type material, the posture of which around the axis line is not aligned automatically, are set on a receiving member 210 of a common conveyor 200 and sent to the three-dimensional laser beam machine by the operator.

Abstract: A technique of easy manufacture of a column and a bed of a machine tool in a short time is provided by having an assembly structure of sheet metal members. A column body of the machine tool is constituted by combining a front member with a rear member 130 and mounting a side cover. Its inside is reinforced by a plurality of ribs 150, 160. Each of the members is made by precision laser machining of sheet plate materials. The column body is assembled by inserting projection portions provided on one member into slits formed on the other member.

Abstract: The invention provides a focus adjuster for laser beam machine which adjusts focus by detecting reflected light of a laser beam in a laser beam machine. A laser beam outputted from a laser oscillator device 550 is reflected by a mirror 570 via an output mirror 560 and introduced into a laser machining tool. The laser beam collected by a machining lens 62 is reflected by a reflector plate M1 and sensed by a reflection detector 580. Automatic focus adjustment is achieved by sensing output of the reflected light as well as changes in focal position due to contamination of the machining lens 62.

Abstract: A laser processing machine is provided in which a machining tool is automatically exchanged with a laser processing tool to be mounted to a processing head thereof to perform machining operations such as tapping to works. A machining tool 70 which is exchangeably clamped to a mounting section 510 of a processing head 50 of a laser processing machine has a body 720 and a piston member 730 in the body 720, and the piston member 730 supports an air motor 740, a reducer 750, a tool chuck 760, and a tap 762. Air is sent to the air motor 740 from an air source 551b by switching a valve, and an assist gas for a normal or reverse rotation is sent from an assist gas source 554b to the upper portion of the piston member 730, so that a tap is lowered to perform tapping to a work.

Abstract: A technique of easy manufacture of a column and a bed of a machine tool in a short time is provided by having an assembly structure of sheet metal members. A column body of the machine tool is constituted by combining a front member 110 with a rear member 130 and mounting a side cover. Its inside is reinforced by a plurality of ribs 150, 160. Each of the members is made by precision laser machining of sheet plate materials. The column body is assembled by inserting projection portions provided on one member into slits formed on the other member.

Abstract: A joint structure for directly joining a plurality of pipes is provided. A first pipe 10 has a joined end face 11 obtained by laser machining at a predetermined angle to an axis and a tenon 12 formed on a joined end face. A second pipe 20 has a joined end face 21 obtained by laser machining at a predetermined angle to an axis and a mortice 22. By fitting the tenon 12 of the first pipe 10 to the mortice 22 of the second pipe 20, a joint structure of the two pipes 10, 20 is formed. The joined end face 11 of the first pipe 10 and the joined end face 21 of the second pipe 20 are on surface contact over the entire thickness of the pipe.

Abstract: It is an object to provide a laser processing machine including an exchangeable torch, wherein a light focus position is automatically adjusted by a program. A laser processing unit 100 includes a torch 130 that is automatically mounted on a processing head 110. The torch 130 has an assist gas chamber 140 and a balance chamber 142, and the assist gas AG is supplied to the chambers. Constantly, equal pressures act on the both chambers, and an upward first force F1 and a downward second force F2 that act on a lens holder 150 offset each other because pressure reception areas are equal. Gas AS is supplied to a gas spring chamber 144 to provide a constant upward force to the lens holder 150. A driving device 200 has an arm 260 driven by a servomotor 220. The arm 260 is in contact with a pin 180 and the lens holder 150 is moved to a predetermined position for automatically adjusting a focus position FC of a collective lens 160.

Abstract: The invention provides a device which optically checks a nozzle tip of a laser machining tool. A camera unit 450 which is raised and lowered in opposing relation to a nozzle 65 of a laser beam machine has a camera chamber 454 and is sealed by protective glass 456, where the camera chamber 454 contains a CCD camera body 460 and lens 462. While a ring light 470 illuminates a surface of the nozzle 65, the CCD camera body 460 checks the nozzle 65 optically.

Abstract: A method for performing piercing preferentially on a laser beam machine by taking advantage of a capability to change laser machining tools automatically. A laser beam machine is equipped with a device for changing a torch and nozzle automatically. The laser beam machine is equipped with a means of selecting preferential treatment of piercing after nesting data is prepared by a CAM or NC system and performs piercing alone in favor of cutting by changing to a special-purpose piercing tool.

Abstract: A device for detecting the position of a seam on a welded pipe in a three-dimensional laser beam machine for processing pipes. The three-dimensional laser beam machine has a chuck 62 for holding, rotating and axially moving a cylindrical pipe 400. A weld seam detection device 100 is equipped with a sensor head 110 provided on a laser processing main body 30. The sensor head 110 has a master lever 120 that moves along an inner wall surface 410 of the cylindrical pipe 400 and a sensor lever 140. When the cylindrical pipe 400 is rotated and the sensor lever 140 contacts the weld seam, the movement of the sensor lever 140 is detected by a micro switch 150, which sends a signal to an NC device 90 by which the weld seam position is recognized.

Abstract: A technique of easy manufacture of a column and a bed of a machine tool in a short time is provided by having an assembly structure of sheet metal members. A column body of the machine tool is constituted by combining a front member with a rear member 130 and mounting a side cover. Its inside is reinforced by a plurality of ribs 150, 160. Each of the members is made by precision laser machining of sheet plate materials. The column body is assembled by inserting projection portions provided on one member into slits formed on the other member.

Abstract: A device for improving the efficiency of operation for aligning the optical axis of mirrors disposed in an optical path for laser transmission in a laser beam machine. The laser beam output from a laser oscillator of a laser beam machine is transmitted via multiple mirrors disposed in the optical path thereof to a torch. A mirror for receiving the laser beam from the mirror is removed and a laser beam detecting device is attached in replacement thereof. The laser beam is passed through a cross-shape target, a portion of which is branched and taken as image by a laser beam detecting picture element. The operator operates adjusting screws and to change the tilt angle of the mirror while watching image data, so as to align the optical axis of the laser beam.

Abstract: There is provided a three-dimensional laser beam machining apparatus for a long workpiece, which includes an automatic loading device for a large variety of materials that feeds materials to a three-dimensional laser beam machine. The automatic loading device 100 for a large variety of materials has a bundle type material loading device 120. A bundle type material W1 is a round pipe or a polygonal pipe, and the posture thereof around the axis line is aligned automatically when the material is conveyed by a roller conveyor 140. The front material stopped by a stopper 150 is sent out to an inclined conveyor 180 over the stopper 150 by means of a swing arm 170. The bundle type material as well as a versatile type material, the posture of which around the axis line is not aligned automatically, are set on a receiving member 210 of a common conveyor 200 and sent to the three-dimensional laser beam machine by the operator.

Abstract: The invention provides a torch changer with a large capacity for a flying optics-type laser beam machine. A table 15 of the laser beam machine is fixed, and a laser beam working head 50 moves in three axial directions. A torch changing unit 300 is disposed on a setup station 90 disposed outside the processing area at the end of the table. A torch storing device 100 stores a large number of torch holders 150 supported by forks on the outer side of a chain 130. A torch holder shifter 200 sends out the torch holder 150 positioned at a shift position towards the torch changing unit 300, where the torch attached to the working head 50 is changed.

Abstract: A laser beam hardening tool is comprised of an engagement portion for freely engaging with a tool holding portion of a machine tool, a beam guide path which is a passage of supplied laser beam, and a torch portion for radiating laser beam which passed through the beam guide path on a workpiece, thereby executing hardening with laser beam inside the machine tool by installing the laser beam hardening tool in the tool holding portion of the machine tool.

Abstract: Voltage fluctuating time integrating means integrates voltage fluctuating time when voltage of a sensor electrode fluctuates as a voltage fluctuation integrated time, and voltage fluctuation occurrence rate computing means computes a rate of occurrence of voltage fluctuation for time on the basis of the voltage fluctuation integrated time integrated. By doing so, quantity of generated plasma can be taken as the rate of occurrence of voltage fluctuation, and plasma detection judging means can easily detect large volume of generated plasma on the basis of the computed voltage fluctuation occurrence rate. Then, it is not necessary to provide a circuit for measuring electric resistance between the sensor electrode and a workpiece as a conventional way, thereby avoiding complexly structured plasma detector.

Abstract: The invention provides an apparatus for subjecting a long size work to three-dimensional laser processing and tap processing. A processing unit 200 disposed on an apparatus for subjecting a long size work such as a pipe to three-dimensional processing via laser comprises a laser processing unit 210 and a tap unit 250. A torch 220 of the laser processing unit 210 subjects the work to laser processing and also forms tap pilot holes thereto. The tap unit 250 has plural drivers 260 allocated by a turret mechanism, wherein the allocated driver 260 is sent in the direction of axis Z2 to subject the work to tap processing via a tap tool 261.

Abstract: The invention provides a laser hardening tool having little laser output loss. The laser hardening tool 100 condenses the irradiated beams LB1 from a semiconductor laser stack 120 via a condensing optical lens 134, and creates parallel light beams LB3 via a diverging optical lens 142. The laser beams LB4 having been bent by a first mirror 160 travels through an optical waveguide 150 having a rectangular cross-sectional shape. The laser beams LB5 having been condensed by a re-condensing optical lens 170 are irradiated through a nozzle 190 to subject a work to hardening. The number of reflections of the laser beams LB4 in the angular optical waveguide 150 is small, and thus the loss of laser output is reduced.

Abstract: The invention provides a rotation-type changer of torches and nozzles for a laser beam machine having a movable table. The automatic tool changer 100 of a laser beam machine is equipped with a plurality of torch holders 160 and a nozzle changer 170 disposed on the magazine 150. The working head 40 moves in a Y-axis direction perpendicular to the paper plane and in a Z-axis direction. The torch holder 160 storing the torch to be exchanged is rotated along the Y-axis path line and the working head 40 is lowered to exchange the torch.