Abstract: The invention provides a laser beam machine having a light path duct with improved dust proof property. A light path system 1 of a laser beam machine comprises a light path duct 10 having a U-shaped cross-section with the upper end opened, wherein the opening portion is covered by a steel belt 30. The laser beam extraction unit 50 traveling on the light path duct 10 in the direction of arrow A elevates the steel belt 30 and extracts the laser beam from the light path duct 10. The steel belt 30 has a guiding projection 32 disposed at the center thereof. The laser beam extraction unit 50 has a guide roller 64 disposed below the steel belt 30 and a guide roller 62 having a V-shaped groove 62a for engaging the projection on the steel belt 30, thereby preventing displacement of the steel belt.

Abstract: The invention provides a laser beam machine having a light path duct with improved dust proof property. A light path system of a laser beam machine comprises a light path duct 10 having a U-shaped cross-section with the upper end opened, and a light path 12 into which clean air is fed. Gutters 110 are disposed on both sides of the light path duct 10, and liquid 120 is filled therein. The laser beam extraction unit 50 traveling on the light path duct 10 has panels 150 disposed on both sides thereof, and a skirt portion 152 formed at the end of each panel 150 is immersed in the liquid 120, thereby forming a liquid seal.

Abstract: A reflector-mirror drive shaft controller is provided for a laser beam machine which optimizes a beam for workpiece thickness by correcting a control axis of a laser reflector-mirror of a laser beam machine. A laser beam outputted from a laser oscillator device of a laser beam machine is reflected by a reflector-mirror via an output mirror and introduced into a laser machining tool. When a machining head moves along an X axis, the reflector-mirror is moved along a U axis parallel to the X axis to keep optical path length constant. By giving an offset ? to U axis control, the incident beam diameter D to the machining lens is varied to form an optimum machining beam for workpiece thickness.

Abstract: A device is provided to remove sputtered materials adhering to a nozzle in a laser processing machine. In a laser processing, some sputtered material S1 adhering to a nozzle 65 degrades copy operations in the processing. A nozzle polishing device 600 comprises a processing head 610, and drives a processing tool 620 which may be a formed grindstone. The processing tool 620 of the formed grindstone has a processing surface 622 which is brought into contact with the nozzle 65 to remove the sputtered material S1.

Abstract: The invention aims at providing a tool change magazine for laser beam machine to improve machining efficiency of a laser beam machine by installing a tool change magazine containing laser machining tools equipped with a torch and a nozzle replaceably attached to the tip of the torch. A setup station 100 for laser machining tools is installed outside a machining area of a laser beam machine. It includes a tool station 200 of the laser beam machine. The tool station 200 of the laser beam machine is equipped, for example, with four tool change magazines 220. A laser machining tool 60 is returned from a machining head 50 to a tool change magazine 220 and a new laser machining tool 60 from a tool change magazine 220 is mounted on the machining head 50.

Abstract: The invention provides a burr removal apparatus for laser beam machine which removes burrs formed on the top surface of a workpiece. When, for example, pilot holes PH are produced in a workpiece W by a laser machining tool 60, molten particles scatter to form whisker-like burrs Wb on the top surface of the workpiece. A whisker-like burr removal apparatus 700 has a machining head 710 which is raised and lowered by a cylinder 720. It removes the whisker-like burrs Wb with a machining tool 730.

Abstract: There are provided a method for producing a die for press brake easily and a die. Three-dimensional models of an upper die 10 and a lower die 20 are prepared based on the data of a work W10. The lower die 20 is divided into plate-shaped die elements 201 to 20n, and each element is subjected to three-dimensional laser beam machining. The die elements are fastened to complete the lower die. The upper die is also produced by the same process.

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 device for automatically selecting a beam mode by limiting an outer diameter size of a laser beam in a laser resonator of a laser processing machine is provided. A laser emitting device 100 emits a laser beam LB in a housing 110 to supply it through an output lens 130 to a processing torch 10. A device for automatically selecting a beam mode 200 is mounted in a direction which is perpendicular to a center axis of the laser beam LB, and has a diaphragm member 220 which is guided by a linear guide. A piston rod 244 is driven by a cylinder 240 mounted outside of a housing 210, and drives a permanent magnet 250 which has one polarity. A permanent magnet 230 which is mounted to the diaphragm member 220 and has the other polarity is driven in a noncontact manner, so that an openings 222 or 224 of the diaphragm member 220 is automatically selected.

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 technology is provided in which a contaminant on a condenser lens in a laser processing machine is detected by detecting a change in focal lengths of the lens. A laser beam LB emitted from a laser resonator 10 is condensed by a condenser lens 100 in a processing head 50 to be irradiated from a nozzle 60 toward a test piece TP. A control device of the laser processing machine controls the moving of the processing head 50 in the Z axis direction and records the Z coordinate of the head. When a focal point falls on a surface of the test piece TP, a blue flame BF is generated. A light receiving device 300 receives the blue flame and sends a signal to the control device. In a contaminated condenser lens 100, a heat is accumlated, which expands the lens and reduces the focal length of the lens. A contaminant on the condenser lens is detected by using this change.

Abstract: An apparatus for dust prevention and cooling of inside of a linear motor is provided. A linear motor 100 includes a tube 110 having an upper opening, a guide wall 112, and stators 140 which are mounted to both sides of the guide wall 112. A mover 150 has coils 160 and moves along a track 130 in the tube 110. The tube 110 are provided with flange sections 120, and two magnetic members 170 are fitted in each of the flange sections 120 to attract both sides of a cover of a steel belt 200. Cooled and dried air is supplied from a cleaning air supplying apparatus 300 into a flow path 122 to achieve cooling and dust prevention of the tube.

Abstract: A nozzle change magazine for laser beam machine which improves machining efficiency of a laser beam machine by installing a nozzle change magazine for laser machining tools equipped with a torch and a nozzle replaceably attached to the tip of the torch. A setup station for laser machining tools is installed outside a machining area of a laser beam machine. It includes a nozzle station which replaces a nozzle at the tip of the torch. The nozzle change station has a large number of magazines and changes the nozzle at the tip of the laser machining tool.

Abstract: The invention provides a device for improving the positioning accuracy of a linear motor. A stator 20 is designed to have two kinds of magnets with different surface magnetism arranged alternately and at uniform intervals along the linear moving direction. A moving member 30 is disposed movably in the linear direction while maintaining a uniform distance from the stator. A detector head 50 formed integrally with the moving member 30 detects the magnetic flux of the stator 20 and sends the data to a control unit 60. The fixed laser length measuring machine 100 irradiates a laser beam LB to a target 110 attached to the moving member, and using the reflected light, measures the distance between the laser length measuring machine and the target highly accurately.

Abstract: The invention provides a nozzle change magazine for laser beam machine which improves machining efficiency of a laser beam machine by installing a nozzle change magazine for laser machining tools equipped with a torch and a nozzle replaceably attached to the tip of the torch. A setup station for laser machining tools is installed outside a machining area of a laser beam machine. It includes a nozzle station 300 which replaces a nozzle at the tip of the torch. The nozzle change station 300 has a large number of magazines and changes the nozzle 65 at the tip of the laser machining tool.

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: 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: The present invention provides 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: The invention provides a reflector-mirror drive shaft controller for laser beam machine which optimizes a beam for workpiece thickness by correcting a control axis of a laser reflector-mirror of a laser beam machine. A laser beam outputted from a laser oscillator device 550 of a laser beam machine is reflected by a reflector-mirror 570 via an output mirror 560 and introduced into a laser machining tool 60. When a machining head moves along an X axis, the reflector-mirror is moved along a U axis parallel to the X axis to keep optical path length constant. By giving an offset a to U axis control, the incident beam diameter D of the machining lens is varied to form an optimum machining beam for workpiece thickness.

Abstract: The invention provides a nozzle presetter for laser machining tool of laser beam machine for externally making position adjustments of nozzles for laser machining tools mounted on a laser beam machine. A nozzle presetter 900 has a base 910, and a support portion 912 is mounted on an upper part of the base 910 to removably support a laser machining tool 60. An alternative beam source 920 is mounted at the center position in an upper part of the support portion 912. A target member 930 is removably mounted on a nozzle mounting member 660 of the laser machining tool 60 via mounting means 654. The target member 930 has a photoreceptor 940 mounted just under a center hole 932. The photoreceptor. 940 senses the quantity of light reaching the photoreceptor through the center hole 932 of the target member 930. The operator changes the axial position of the nozzle mounting member 660 using four adjustment screws 670.