Yamazaki Mazak Corporation

Yamazaki Mazak Kabushiki Kaisha

Other

Naoomi Miyakawa

Tsunehiko Yamazaki

Minoru Tashiro

Takeshi Sato

Yukiyasu Nakamura

Kazuyuki Toda

Yoshihisa Yamaoka

Isao Kuwayama

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.

Laser processing machine having programmable focus positioning function

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 devicefor a large variety of materials has a bundle type material loading device. A bundle type material Wis 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. The front material stopped by a stopperis sent out to an inclined conveyorover the stopperby means of a swing arm. 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 memberof a common conveyorand sent to the three-dimensional laser beam machine by the operator.

Three-dimensional laser beam machining apparatus for long workpiece

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 memberand mounting a side cover. Its inside is reinforced by a plurality of ribs. 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.

Method of manufacturing column and bed of machine tool

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 deviceis reflected by a mirrorvia an output mirrorand introduced into a laser machining tool. The laser beam collected by a machining lensis reflected by a reflector plate Mand sensed by a reflection detector. 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

Focus adjuster for laser beam machine

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 toolwhich is exchangeably clamped to a mounting sectionof a processing headof a laser processing machine has a bodyand a piston memberin the body, and the piston membersupports an air motor, a reducer, a tool chuck, and a tap. Air is sent to the air motorfrom an air sourceby switching a valve, and an assist gas for a normal or reverse rotation is sent from an assist gas sourceto the upper portion of the piston member, so that a tap is lowered to perform tapping to a work.

Laser processing machine

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 memberwith a rear memberand mounting a side cover. Its inside is reinforced by a plurality of ribs. 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.

Column and bed of machine tool

A joint structure for directly joining a plurality of pipes is provided. A first pipehas a joined end faceobtained by laser machining at a predetermined angle to an axis and a tenonformed on a joined end face. A second pipehas a joined end faceobtained by laser machining at a predetermined angle to an axis and a mortice. By fitting the tenonof the first pipeto the morticeof the second pipe, a joint structure of the two pipesis formed. The joined end faceof the first pipeand the joined end faceof the second pipeare on surface contact over the entire thickness of the pipe.

Joint structure of pipe

The invention provides a device which optically checks a nozzle tip of a laser machining tool. A camera unitwhich is raised and lowered in opposing relation to a nozzleof a laser beam machine has a camera chamberand is sealed by protective glass, where the camera chambercontains a CCD camera bodyand lens. While a ring lightilluminates a surface of the nozzle, the CCD camera bodychecks the nozzleoptically.

Method for checking a nozzle for a laser beam machine

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.

Piercing method for laser beam machine

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 chuckfor holding, rotating and axially moving a cylindrical pipe. A weld seam detection deviceis equipped with a sensor headprovided on a laser processing main body. The sensor headhas a master leverthat moves along an inner wall surfaceof the cylindrical pipeand a sensor lever. When the cylindrical pipeis rotated and the sensor levercontacts the weld seam, the movement of the sensor leveris detected by a micro switch, which sends a signal to an NC deviceby which the weld seam position is recognized.

Pipe seam detection device of three-dimensional laser beam machine

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.

Optical path axis aligning device of laser beam machine

The invention provides a torch changer with a large capacity for a flying optics-type laser beam machine. A tableof the laser beam machine is fixed, and a laser beam working headmoves in three axial directions. A torch changing unitis disposed on a setup stationdisposed outside the processing area at the end of the table. A torch storing devicestores a large number of torch holderssupported by forks on the outer side of a chain. A torch holder shiftersends out the torch holderpositioned at a shift position towards the torch changing unit, where the torch attached to the working headis changed.

Automatic tool changer of laser beam machine

The invention provides a laser hardening tool having little laser output loss. The laser hardening toolcondenses the irradiated beams LBfrom a semiconductor laser stackvia a condensing optical lens, and creates parallel light beams LBvia a diverging optical lens. The laser beams LBhaving been bent by a first mirrortravels through an optical waveguidehaving a rectangular cross-sectional shape. The laser beams LBhaving been condensed by a re-condensing optical lensare irradiated through a nozzleto subject a work to hardening. The number of reflections of the laser beams LBin the angular optical waveguideis small, and thus the loss of laser output is reduced.

Laser hardening tool

The invention provides a rotation-type changer of torches and nozzles for a laser beam machine having a movable table. The automatic tool changerof a laser beam machine is equipped with a plurality of torch holdersand a nozzle changerdisposed on the magazine. The working headmoves in a Y-axis direction perpendicular to the paper plane and in a Z-axis direction. The torch holderstoring the torch to be exchanged is rotated along the Y-axis path line and the working headis lowered to exchange the torch.

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 presetterhas a baseand a support portionis mounted on an upper part of the baseto removably support a laser machining toolAn alternative beam sourceis mounted at the center position in an upper part of the support portionA target memberis removably mounted on a nozzle mounting memberof the laser machining toolvia mounting meansThe target memberhas a photoreceptormounted just under a center holeThe photoreceptor.senses the quantity of light reaching the photoreceptor through the center holeof the target memberThe operator changes the axial position of the nozzle mounting memberusing four adjustment screwsWhen a collected beam passes through the center holeof the target memberoutput voltage of the photoreceptorrises. When the operator is notified to that effect, he/she completes the adjustment.

Growing community of inventors

Aichi-pref., Japan

Naoomi Miyakawa