JP5846842B2 - Laser punch processing method and laser punch combined processing machine - Google Patents

Description

  The present invention relates to a laser punch processing method using a laser / punch combined processing machine in which a laser cutting processing machine that performs laser cutting processing on a plate-shaped workpiece and a punching machine that performs punching processing on the workpiece, and the above laser / punch combined processing More particularly, the present invention relates to a laser punch processing method that prevents spatter scattered during piercing processing at the start of laser cutting processing from being welded to the workpiece surface, and a laser / punch combined processing machine used for the method. .

  Conventionally, when laser cutting is performed on a plate-shaped workpiece with a laser / punch combined processing machine, after punching the workpiece, laser cutting of the contour of the product is performed so as to include the punching position inside. It is common. In order to perform laser cutting of a workpiece, laser cutting is performed along the contour of the product after performing piercing processing for processing a through hole penetrating the workpiece at a laser cutting processing start position.

  As described above, when piercing processing is performed at the laser cutting processing start position, until the through hole reaches the back surface (lower surface) of the workpiece, the molten metal melted by the laser light irradiation is injected to the laser cutting processing position. It is scattered around as spatter by gas. The scattered spatter may drop onto the workpiece upper surface and be welded to the workpiece upper surface. As described above, when spatter is deposited on the workpiece upper surface, it is difficult to blow off with the high-pressure gas. Therefore, if the gap dimension between the workpiece upper surface and the laser processing head is detected by a gap sensor and copying is performed while keeping the gap dimension constant, the machining conditions will differ due to the influence of spatter deposited on the workpiece upper surface. Processing quality may deteriorate.

  Therefore, in order to prevent spatter from welding to the workpiece surface, it has been proposed to apply a sputtering inhibitor to the workpiece surface (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2004-230413

  The configuration described in Patent Document 1 not only sprays an anti-spattering agent toward the workpiece and applies the anti-sputtering agent to the surface to be processed, but also coats the generated spatter itself with the anti-sputtering agent. is there. Therefore, although spatter can be prevented from being deposited on the upper surface of the workpiece, the spatter inhibitor is consumed in a large amount, and the spatter inhibitor remaining on the workpiece surface is removed when moving to a subsequent process. May be necessary, and further improvements are required.

The present invention was made in view of the problems as described above, and is a laser / punch combined processing machine that performs laser cutting processing and punching processing on a plate-shaped workpiece, and a punch holder in the combined processing machine, An attachment tool contact for attaching a spatter adhesion preventing agent to the upper surface of the workpiece at the lower part of the attachment tool body, which is provided with an attachment tool body that is pressed and lowered by a striker that can be moved up and down on the combined processing machine. A portion is provided so as to be able to contact the upper surface of the workpiece.

  Further, in the laser / punch combined processing machine, the attachment tool contact portion is a size that attaches a spatter welding inhibitor in a range of at least a diameter of 3 mm when contacting the workpiece upper surface. is there.

  According to the present invention, the attachment contact portion provided in the attachment main body is brought into contact with the upper surface of the work so that the spatter adhesion preventing agent adheres to the upper surface of the work. It can be suppressed to a small size, and adhesion of the spatter welding inhibitor to the work can be reduced. Therefore, according to the present invention, it is possible to prevent spatter from being welded, to reduce the consumption of the spatter welding inhibitor, and to omit the step of removing the sputter welding inhibitor from the workpiece upper surface as post-processing. It is possible to improve efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory plan view schematically and schematically showing a laser / punch combined processing machine according to an embodiment of the present invention. It is sectional explanatory drawing of an attachment tool.

  Hereinafter, the laser / punch combined processing machine according to the embodiment of the present invention will be described with reference to the drawings. The overall configuration of the laser / punch combined processing machine is already known. The general configuration will be briefly described.

  As shown in FIG. 1 as a plan view, a laser / punch combined processing machine 1 according to an embodiment of the present invention has a punching machine (punch press) 3 for punching a plate-like workpiece W and a laser on the workpiece W. It is the structure which compounded the laser cutting machine 5 for performing a cutting process. The punch press 3 is exemplified by a turret punch press in the present embodiment.

  That is, the turret punch press 3 includes a frame main body 7 having a portal structure in which an upper frame 7U and a lower frame 7L are vertically separated. The upper frame 7U in the frame body 7 is provided with an upper turret 9U as a punch holder provided with a plurality of punches (upper molds) that can be moved up and down and detachably exchanged, and can be rotated horizontally. The lower frame 7L is provided with a lower turret 9L as a die holder provided with a plurality of dies (lower molds) corresponding to the punches so as to be detachable and replaceable.

  When the upper and lower turrets 9U and 9L are rotated and a pair of punches and dies are indexed and positioned at the punching processing position P, punches are used to punch the workpiece W with the paired punches and dies. A striker S that can be freely pressed is provided so as to be movable up and down. The striker S can adjust the lowering position of the punch, and can adjust the vertical movement position of the striker S itself. That is, the vertical movement position of the striker S can be adjusted by controlling the vertical movement actuator for moving the striker S up and down.

  In order to move the workpiece W in the X and Y axis directions relative to the punching position P, the punch press 3 includes a work table 11 that supports the workpiece W. The punch press 3 is provided with a carriage base 13 that can be moved and positioned in the Y-axis direction, which is a direction approaching and separating from the punching position P by the Y-axis motor YM. The carriage base 13 is formed long in the X-axis direction, and a carriage 15 that is moved and positioned in the X-axis direction by the X-axis motor XM mounted on the carriage base 13 moves in the X-axis direction. It is provided freely. The carriage 15 is provided with a plurality of work clamps 17 capable of crunching the end edges of the work W so as to be movable toward and away from each other.

  The laser cutting machine 5 includes a laser oscillator 19 and a laser processing head 21 disposed at a laser processing position L close to the punching processing position P. The laser oscillator 19 and the laser processing head 21 are: Optically connected via an appropriate optical path such as an optical path such as a combination of a plurality of reflecting mirrors and a beam duct or an optical fiber for guiding the laser beam oscillated in the laser oscillator 19 to the laser processing head 21. It is.

  Accordingly, the workpiece W cranked by the workpiece crank 17 is moved in the X and Y axis directions, the machining position of the workpiece W is positioned at a position corresponding to the punching machining position P, and punching machining is performed. The laser processing can be performed by positioning to a position corresponding to the position L.

  By the way, in the laser / punch combined processing machine 1, after punching the workpiece W at the punching position P, the contour of the product is laser cut at the laser processing position L so as to include the punching position inside. Is to do. As described above, when laser cutting of the workpiece W is started at the laser processing position L, at the time of piercing processing at the start of the laser cutting processing, the spattering of the workpiece W is continued until a through-hole penetrating the back surface (lower surface) of the workpiece is formed. It may be scattered and welded on the upper surface.

  Therefore, in order to prevent the spatter welding, the laser / punch combined processing machine 1 is provided with a spatter welding preventing means. More specifically, in the upper turret 9U as an example of the punch holder, an attachment tool 23 (see FIG. 2) for adhering the spatter anti-welding agent to the upper surface of the work W can be moved up and down and can be attached and detached. Is provided. That is, as shown in FIG. 2, the attachment tool 23 includes a cylindrical attachment body 27 that is supported by the upper turret 9 </ b> U via a lifter spring 25 so as to be movable up and down.

  Inside the attachment main body 27, there is provided a large-diameter storage portion 29 for storing a spatter anti-spraying agent such as dimethyl silicone oil similar to the anti-sputtering agent described in Patent Document 1. An upper cap 31 that is pressed by a striker S provided in the punch press 3 so as to be movable up and down is screwed into an upper portion of the storage portion 29. Then, the lower end portion of the communication hole 33 in the vertical direction provided in the attachment tool body 27 so as to communicate with the storage portion 29 is in contact with the upper surface of the workpiece W so as to adhere the spatter welding inhibitor to the workpiece W. An attachment tool contact portion 35 is provided.

  The attachment tool contact portion 35 is configured such that the spatter welding preventive agent is prevented from continuously flowing out from the communication hole 33 and prevents spatter welding to the work W when it comes into contact with the upper surface of the work W. Any structure that adheres the agent is acceptable. Therefore, in the present embodiment, a holder block 37 is provided that is detachably attached to the lower end surface of the attachment tool body 27 via a fixture (not shown) such as a mounting screw. A contact member 39 such as a porous member made of an appropriate material is placed in the vertical through hole 37H formed in the holder block 37 so as to allow the spatter welding inhibitor to ooze out. It is movably inserted.

  The contact member 39 is always urged downward by an elastic member 41 such as a coil spring elastically mounted between the lower surface of the attachment main body 27 and the lower end portion of the contact member 39 is the holder block. It is in the state which always protruded from the lower surface of 37. The upper end portion of the contact member 39 can be inserted into the communication hole 33 from below, and the upper end portion of the contact member 39 is a ball provided on the lower end portion of the communication hole 33 so as to be movable up and down. The poppet valve 43 constructed from the above is configured to be able to be pushed up.

  In the configuration as described above, after the workpiece W is punched at the punching position P, and before the laser cutting is performed at the laser position L, the attachment tool 23 provided on the upper turret 9U is attached to the punching position P. Index to position. Then, after positioning the piercing process at the initial stage of the laser cutting process at a position below the attachment tool 23, the striker S provided on the punch press 3 so as to be movable up and down is used to lift the attachment tool body 27 of the attachment tool 23 to the lifter spring. 25, the lower surface of the contact member 39 provided on the attachment tool 23 comes into contact with the upper surface of the workpiece W at the piercing start position.

  As described above, when the lower surface of the contact member 39 comes into contact with the upper surface of the workpiece W, the spatter welding preventing agent contained in the contact member 39 is attached to the upper surface of the workpiece. Further, when the lower surface of the contact member 39 is in contact with the upper surface of the workpiece W, when the attachment main body 27 is further pushed down, the contact member 39 is relatively raised and pushes up the poppet valve 43. The spatter welding inhibitor in the hole 33 flows out to the contact member 39. Thereafter, when the striker S is raised and returned to the original position, the attachment tool 23 is raised and returned to the original position, and the contact member 39, the poppet valve 43 and the like are also returned to the original positions.

  As already understood, the adhesion action of the spatter welding inhibitor to the piercing start position of the workpiece W is caused by moving the contact member 39 along the workpiece upper surface with respect to the workpiece W, that is, with respect to the workpiece W. Since it adheres when the contact member 39 is moved in the direction of approaching and moving away from the upper surface of the workpiece W without rubbing the contact member 39, the spatter is deposited at the piercing start position on the upper surface of the workpiece. It is possible to suppress the consumption of the welding inhibitor to a small amount. And by attaching the spatter welding inhibitor at the piercing processing start position of the workpiece W, it is possible to prevent the spatter scattered during the piercing processing from welding to the upper surface of the workpiece W.

  By the way, as described above, when the area where the lower surface of the contact member 39 is brought into contact with the upper surface of the work and the spatter welding inhibitor is attached is larger than necessary, the consumption of the sputter welding inhibitor increases. Therefore, a template with a hole diameter of 1.6 mm, 2.0 mm, and 3.0 mm was prepared, and when a piercing process was performed by attaching a spatter anti-welding agent to the upper surface of the workpiece from this template, the hole diameter was 1.6 mm. In the case of 2.0 mm, the effect of preventing scattered spatter from adhering to the upper surface of the work was recognized in the region where the spatter anti-welding agent was adhered, but the spatter was applied outside the hole diameter. There was a case of welding on the upper surface. However, when the hole diameter of the template was 3.0 mm, spatter did not weld to the upper surface of the workpiece even outside the hole diameter.

  Therefore, it is desirable that the diameter of the portion where the contact member 39 comes into contact with the upper surface of the workpiece W and adheres the spatter welding inhibitor to the upper surface of the workpiece is at least 3 mm.

  As can be understood from the above description, the adhesion of the spatter welding inhibitor to the piercing processing start position causes the contact member 39 to move closer to and away from the workpiece without spraying or rubbing the spatter welding inhibitor. Since it adheres when it moves in the direction of contact, it can suppress the consumption of the spatter anti-adhesive agent, and can carry out an appropriate amount of adhering without too much spatter anti-adhesive agent attached. It is possible to solve the conventional problems as described above.

  The present invention is not limited to the above-described embodiment, and can be implemented in other forms by making appropriate changes. That is, the punch press is not limited to the turret punch press. For example, the workpiece is moved in one direction in the X and Y directions, and the punching head and the laser processing head are moved in the other directions in the X and Y directions. It can also be implemented in the machine. That is, the present invention can be implemented in various types of multi-task machines.

  Moreover, in the said embodiment, although illustrated about the case where the attachment tool 23 was provided in the upper turret 9U as an example of a punch holder, not only a punch holder but the attachment tool 23 was mounted to the frame main body 7, The attachment tool 23 can be moved up and down by a vertical movement actuator mounted on the main body 7. That is, it can be implemented in various forms by making appropriate changes.

DESCRIPTION OF SYMBOLS 1 Laser punch combined processing machine 3 Punch press 5 Laser cutting processing machine 9U Upper turret 21 Laser processing head 23 Adhering tool 27 Adhering tool main body 29 Storage part 33 Communication hole 35 Adhering tool contact part 39 Contact member

Claims (2)

A laser / punch combined processing machine that performs laser cutting and punching processing on a plate-shaped workpiece, and is pressed down by a striker provided in the combined processing machine so as to be movable up and down. The attachment tool main body is provided so as to be movable up and down, and an attachment tool contact portion for adhering the spatter welding preventing agent to the work upper surface is provided at the lower part of the attachment tool body so as to be able to contact the work upper surface. Laser punch combined processing machine. 2. The laser / punch combined processing machine according to claim 1, wherein the attachment tool contact portion is sized to attach a sputter welding inhibitor in a range of at least a diameter of 3 mm when contacting the workpiece upper surface. Laser punch combined processing machine.

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