JP2022074313A - Laser processing device - Google Patents

Abstract

To provide a laser processing device capable of restraining swinging of a laser head unit during movement and damage to a belt for moving the laser head unit.SOLUTION: A laser processing device 1 has an upstream-side guide member 531 and a downstream-side guide member 532 for slidably supporting a laser head unit 3 along a width direction crossing with a carrying direction Y above a workpiece W, and a belt 54 hung along the width direction above the workpiece W and fixed to the laser head unit 3 at a first fixing part 543. The laser head unit 3 is positioned between the guide members 531, 532 in plan view. A first traverse section 541, which is a part of the belt 54 that is positioned above the workpiece W, is positioned between the guide members 531, 532 in plan view, and a lower end surface 541a of the first traverse section 541 is positioned on an upper side relative to a lower end surface 531b of the upstream-side guide member 531 in side view.SELECTED DRAWING: Figure 4

Description

The present invention relates to a laser processing apparatus. More specifically, the present invention relates to a laser processing apparatus that moves a laser head that irradiates a laser above a work by winding an endless winding member.

Conventionally, there has been proposed a laser processing device that cuts a plate material into a desired shape by moving a laser head that irradiates a laser beam in a plane on the upper part of the plate material that is sent out by a transport device, and uses it as a blank material. In such a laser processing apparatus, it is preferable to reduce the weight of the laser head as much as possible in order to suppress the shaking due to the inertia of the laser head during movement.

In Patent Documents 1 and 2, the laser head is slidably supported along the extending direction of the guide member by the guide member hung above the work, and the laser head is extended by the belt drive. A laser processing device that moves along the current direction is shown. According to the laser processing apparatus shown in Patent Documents 1 and 2, the weight of the laser head can be reduced by moving the laser head by a belt without having a drive source in the laser head.

Japanese Unexamined Patent Publication No. 07-202488 Japanese Unexamined Patent Publication No. 2013-862921

However, in the laser processing apparatus shown in Patent Documents 1 and 2, since the laser head is supported by a cantilever by a guide member, twisting and shaking occur when the laser head is moved at high speed, and the processing accuracy is improved. It may decrease. Further, in rare cases, the end portion of the plate material may be warped toward the laser head side. When such a plate material is transported from the upstream side along the transport direction by a transport device, the belt may be cut by the end portion of the plate material.

An object of the present invention is to provide a laser machining apparatus capable of suppressing shaking of a machining tool during movement and damage to an endless winding member for moving the machining tool.

(1) The laser processing apparatus according to the present invention (for example, the laser processing apparatus 1 described later) transports a work (for example, the work W described later) along a transport direction (for example, a transport direction Y described later). An apparatus (for example, a work transfer device 2 described later), a processing tool for processing the work by irradiating the work with a laser beam from above (for example, a laser head unit 3 described later), and the transfer above the work. An upstream guide member (eg, upstream guide member 531 described below) that extends along a width direction intersecting the direction (eg, width direction X described below) and slidably supports the machining tool along the width direction. ) And a downstream guide member (for example, a downstream guide member 532 described later) and an endless winding member (for example, an endless winding member that is hung along the width direction above the work and is at least partially fixed to the processing tool). For example, the processing tool is provided with a belt 54) described later and a moving mechanism (for example, the moving mechanism 55 described later) for moving the processing tool along the width direction by winding the endless winding member. Is arranged between the upstream side guide member and the downstream side guide member in a plan view, is arranged above the work among the endless winding members, and is a first fixing portion to the processing tool (for example, described later). The first section (for example, the first crossing section 541 described later), which is a portion including the first fixed portion 543), is arranged between the upstream guide member and the downstream guide member in a plan view, and is described above. The lower end surface of the work side in the first section (for example, the lower end surface 541a described later) is arranged above the lower end surface of the upstream guide member (for example, the lower end surface 531b described later) in a side view. It is characterized by that.

(2) In this case, the laser processing apparatus is provided with a counterweight slidable along the width direction with respect to the downstream guide member on the downstream side in the transport direction from the downstream guide member (for example, described later). The counter weight 4) is further provided, and the counter weight is a second section (for example, a second crossing section described later) which is a portion of the endless winding member arranged above the work and different from the first section. 542) is fixed by a second fixing portion (for example, a second fixing portion 544 described later), and the second section is arranged on the downstream side in the transport direction from the downstream side guide member in a plan view, and the second section. The lower end surface of the section on the work side (for example, the lower end surface 542a described later) may be arranged above the lower end surface of the downstream guide member (for example, the lower end surface 532b described later) in a side view. preferable.

(3) In this case, the positions of the center of gravity (for example, the center of gravity P described later) of the processing tool are the upper end surfaces (for example, the upper end surfaces 531a and 532a described later) and the lower end surfaces of the upstream and downstream guide members in a side view. (For example, it is preferable to be arranged between the lower end surfaces 531b and 532b described later).

(1) In the present invention, the processing tool for irradiating the work with laser light is slid along the width direction by the upstream guide member and the downstream guide member arranged on the upstream side and the downstream side in the transport direction in a plan view. It is freely supported and moved along the width direction by winding the endless winding member fixed to this processing tool. That is, in the present invention, by supporting the machining tool by holding both from the upstream side and the downstream side in the transport direction, it is possible to suppress the shaking of the machining tool during movement. Further, in the present invention, the first section of the endless winding member, which is located above the work and includes the first fixing portion for the machining tool, is between the upstream guide member and the downstream guide member in a plan view. Further, the lower end surface of the first section is arranged above the lower end surface of the upstream guide member in the side view. Therefore, according to the present invention, even when the work bent back to the processing tool side is conveyed by the conveying device, the work comes into contact with the upstream guide member before it comes into contact with the endless winding member. It can also suppress the damage of.

(2) In the present invention, the counterweight is slidably supported in the width direction by the downstream guide member on the downstream side in the transport direction from the downstream guide member, and is defined in the second section of the endless winding member. It is fixed to the second fixing part. As a result, the counterweight moves in the opposite direction to the machining tool in conjunction with the movement along the width direction of the machining tool. Further, by providing the counterweight at such a position, it is possible to suppress the shaking of the machining tool when the upstream guide member and the downstream guide member are moved together with the machining tool and the counterweight along the transport direction. Further, in the present invention, the second section of the endless winding member is arranged on the downstream side in the transport direction from the downstream side guide member in a plan view, and the lower end surface of the second section is further below the downstream side guide member in a side view. Place it above the end face. Therefore, according to the present invention, even when the end portion of the work after being machined by the laser beam is warped toward the machining tool side, the end portion of the work is on the downstream side before coming into contact with the second section of the endless winding member. Since it comes into contact with the guide member, damage to the endless winding member can be further suppressed.

(3) In the present invention, the position of the center of gravity of the machining tool is arranged between the upper end surface and the lower end surface of the upstream side and downstream side guide members in the side view. This makes it possible to further suppress the shaking of the processing tool during movement.

It is a perspective view of the laser processing apparatus which concerns on one Embodiment of this invention. It is a figure which shows typically the structure in the plan view of a head drive mechanism. It is a figure which shows the state which moved the laser head unit to the 1st Y axis guide member side along the width direction. It is a figure which shows the state which moved the laser head unit to the downstream side along the transport direction. It is sectional drawing along the line IV-IV in FIG.

Hereinafter, the laser processing apparatus according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the configuration of the laser processing apparatus 1 according to the present embodiment. The laser processing apparatus 1 cuts the work W into a desired shape by irradiating the work W transported along the transport direction Y with a laser beam from the upper side of the work W.

The laser processing device 1 includes a work transfer device 2 that conveys the work W along the transfer direction Y, a laser head unit 3 that cuts the work W by irradiating the work W with laser light from above, and a laser head. A head drive mechanism 5 for moving the unit 3 and a counter weight 4 described later in a horizontal plane formed by a transport direction Y and a width direction X orthogonal to the transport direction Y above the work W, and a laser head unit 3 and a laser beam supply. A flexible cable 6 for connecting a laser oscillator (not shown) as a source and a cable support mechanism 7 for supporting the cable 6 are provided. The work W is, for example, a plate material or a steel plate made of an aluminum alloy, but the present invention is not limited to these. In the following, walking orthogonal to the transport direction Y and the width direction X is referred to as a height direction Z.

The work transfer device 2 is a belt conveyor, and has a plurality of belt rollers (not shown) that are rotatable around an axis parallel to the width direction X, an endless belt-shaped belt B hung on these belt rollers, and these. By rotationally driving the belt roller, the belt B and the work W mounted on the belt B are sent out from the upstream side (left side in FIG. 1) to the downstream side (right side in FIG. 1) along the transport direction Y. It is equipped with a roller drive device (not shown).

The cable support mechanism 7 supports the support frame 8 provided above the belt B, the first holder 61, the second holder 62, and the third holder 63 that grip a part of the cable 6, and the cable 6. A support unit 71, a second support unit 72, a third support unit 73, and a fourth support unit 74 are provided.

The support frame 8 is composed of a plurality of pillar members arranged so as to surround the processing range of the laser head unit 3 (that is, the processing range of the laser head unit 3) in a plan view.

The cable 6 is a plurality of wire members connected to the laser head 31, such as an optical cable for transmitting laser light generated by a laser oscillator, a signal line for a sensor, a hose through which cooling water or gas passes, and a power line through which current flows. Consists of.

The three holders 61, 62, and 63 grip the cable 6 by the multi-packing and the clamp, respectively. The cable 6 extending from the laser head unit 3 to the laser oscillator (not shown) is provided with a first holder 61, a second holder 62, and a third holder 63 in this order from the laser head unit 3 side to the laser oscillator side. Has been done.

Each of the four support units 71 to 74 is fixed to the support frame 8. The first support unit 71 and the second support unit 72 swingably support the portion of the cable 6 gripped by the first holder 61. The third support unit 73 swingably supports the portion of the cable 6 gripped by the second holder 62. The fourth support unit 74 slidably supports the portion gripped by the third holder 63 of the cable 6 along the transport direction Y above the belt B. That is, these support units 71 to 74 swingably support the cable 6 and move the cable 6 in accordance with the movement of the laser head 31.

FIG. 2 is a diagram schematically showing the configuration of the head drive mechanism 5 in a plan view. In FIG. 2, the left side is the upstream side in the transport direction Y, and the right side is the downstream side in the transport direction Y.

The head drive mechanism 5 includes a first Y-axis guide member 51 and a second Y-axis guide member 52 extending parallel to each other along the transport direction Y on both sides of the belt B, and the first Y-axis guide member 51 and the second Y-axis guide member 52. The X-axis guide member 53 that is hung between the two and supports the laser head unit 3 and the counter weight 4, and the extension of each of the first Y-axis guide member 51, the second Y-axis guide member 52, and the X-axis guide member 53. A belt 54 as an endless winding member that is hung along the current direction and fixed to the laser head unit 3 and the counter weight 4 at least in part, and the laser head unit 3 and the counter weight 4 are wound by winding the belt 54. A moving mechanism 55 for moving along a horizontal plane including a transport direction Y and a width direction X is provided.

The first Y-axis guide member 51 extends on the left side of the belt B along the transport direction Y when viewed from the upstream side in the transport direction Y. The second Y-axis guide member 52 extends on the right side of the belt B along the transport direction Y when viewed from the upstream side in the transport direction Y. These Y-axis guide members 51 and 52 slidably support both ends of the X-axis guide member 53 along the width direction X along the transport direction Y, respectively.

The X-axis guide member 53 includes an upstream guide member 531 extending along the width direction X above the work W transported by the belt B, and a downstream guide member 531 above the work W and along the transport direction Y. A second that connects a downstream guide member 532 extending along the width direction X on the side, and an end portion of the upstream guide member 531 and the downstream guide member 532 extending along the transport direction Y on the first Y-axis guide member 51 side. It includes one connecting portion 533 and a second connecting portion 534 extending along the transport direction Y and connecting the ends of the upstream guide member 531 and the downstream guide member 532 on the second Y-axis guide member 52 side. The upstream guide member 531 and the downstream guide member 532 are connected by the first connecting portion 533 and the second connecting portion 534 in a state of being parallel to each other in a plan view and having a predetermined interval along the transport direction Y. The first connecting portion 533 is slidably supported along the transport direction Y by the first Y-axis guide member 51, and the second connecting portion 534 is slidable along the transport direction Y by the second Y-axis guide member 52. Is supported by. Therefore, the upstream guide member 531 and the downstream guide member 532 are slidable along the transport direction Y with respect to the Y-axis guide members 51 and 52 above the work W.

As shown in FIG. 2, the laser head unit 3 is arranged between the upstream guide member 531 and the downstream guide member 532 in a plan view, and the counterweight 4 is conveyed from the downstream guide member 532 in a plan view. It is located on the downstream side of Y.

A first X-axis guide rail 535 extending along the width direction X is formed at an end portion of the upstream guide member 531 on the downstream side in the transport direction Y. A second X-axis guide rail 536 extending along the width direction X is formed at the upstream end of the downstream guide member 532 in the transport direction Y. The end portion of the laser head unit 3 on the upstream side in the transport direction Y is slidably supported along the first X-axis guide rail 535, and the end portion of the laser head unit 3 on the downstream side in the transport direction Y is supported. It is slidably supported along the second X-axis guide rail 536. Therefore, the laser head unit 3 is supported by both holdings between the upstream guide member 531 and the downstream guide member 532 by the upstream guide member 531 and the downstream guide member 532.

A third X-axis guide rail 537 extending along the width direction X is formed at the downstream end of the downstream guide member 532 on the downstream side in the transport direction Y. The end portion of the counterweight 4 on the upstream side in the transport direction Y is slidably supported along the third X-axis guide rail 537.

The belt 54 is endless, that is, annular and strip-shaped. Hereinafter, a case where the belt 54 is used as the endless winding member will be described, but the present invention is not limited to this. As the endless winding member, for example, a chain may be used.

The moving mechanism 55 includes a first motor 56, a second motor 57, a first pulley 58, and a second pulley 59 over which the belt 54 is hung.

The first motor 56 and the second motor 57 are provided on both sides of the belt B along the width direction X, respectively. In other words, the first motor 56 and the second motor 57 are provided at positions facing each other along the width direction X across the belt B. The first motor 56 and the second motor 57 can independently wind the belt 54 clockwise or counterclockwise in a plan view in response to a command from a control device (not shown).

The first pulley 58 and the second pulley 59 are provided on both sides of the belt B along the width direction X on the downstream side in the transport direction Y with respect to the first motor 56 and the second motor 57, respectively. In other words, the first pulley 58 and the second pulley 59 are provided at positions facing the first motor 56 and the second motor 57 on the downstream side in the transport direction Y along the width direction X with the belt B interposed therebetween. ing. The first pulley 58 and the second pulley 59 rotate clockwise or counterclockwise in a plan view in accordance with the movement of the belt 54.

The belt 54 has an H-shape along the extending direction of the Y-axis guide members 51 and 52 and the X-axis guide member 53 in a plan view, and the first motor 56, the second motor 57, and the first pulley 58 are formed. , And the second pulley 59. By hanging the endless belt 54 in an H shape in a plan view, the belt 54 works in two sections, a first crossing section 541 and a second crossing section 542 different from the first crossing section 541. It crosses above W along the width direction X. In the following, of these two crossing sections 541 and 542, the one that crosses the upstream side in the transport direction Y (that is, the motors 56 and 57 sides) is referred to as a first crossing section 541, with respect to the first crossing section 541. A section that crosses the downstream side (that is, the pulleys 58 and 59 sides) from the transport direction Y is referred to as a second crossing section 542.

As shown in FIG. 2, the first crossing section 541 of the belt 54 extends above the work W along the width direction X, and is arranged between the upstream guide member 531 and the downstream guide member 532 in a plan view. ing. As described above, the laser head unit 3 arranged between the upstream guide member 531 and the downstream guide member 532 is fixed to the belt 54 at the first fixing portion 543 in the first crossing section 541.

Further, the second crossing section 542 of the belt 54 extends above the work W along the width direction X, and is arranged on the downstream side in the transport direction Y from the downstream side guide member 532 in a plan view. As described above, the counterweight 4 arranged on the downstream side in the transport direction Y from the downstream side guide member 532 is fixed to the belt 54 at the second fixing portion 544 in the second crossing section 542. More specifically, the distance along the belt 54 between the first fixing portion 543 and the second fixing portion 544 is the path following the first motor 56 and the first pulley 58 side, and the second motor 57 and the second. 2 It is almost equal to the path following the pulley 59 side. Therefore, when the laser head unit 3 is arranged in the center along the width direction X between the first Y-axis guide member 51 and the second Y-axis guide member 52 as shown in FIG. 2, the counterweight 4 and the laser head unit 3 are arranged. Facing the downstream side guide member 532 along the transport direction Y.

In the laser processing device 1, the laser head unit 3 can be moved along the horizontal plane above the work W by controlling the rotations of the motors 56 and 57 in combination by a control device (not shown).

FIG. 3A is a diagram showing a state in which the laser head unit 3 is moved toward the first Y-axis guide member 51 along the width direction X. When the laser head unit 3 is moved toward the first Y-axis guide member 51 along the width direction X, both the first motor 56 and the second motor 57 are rotated counterclockwise at the same speed in a plan view to obtain a belt. Wind 54 counterclockwise. As a result, the laser head unit 3 fixed to the first crossing section 541 moves toward the first Y-axis guide member 51, and the counterweight 4 fixed to the second crossing section 542 moves to the second Y-axis guide member 52 side. Move to. At this time, by rotating the first motor 56 and the second motor 57 at the same speed, the speed of the belt 54 sent from the first motor 56 to the first crossing section 541 and the speed of the belt 54 sent from the second pulley 59 to the second crossing section 541. Since the speed of the belt 54 sent out to 542 becomes equal, the laser head unit 3 and the counter weight 4 are moved along the width direction X while the position of the X-axis guide member 53 along the transport direction Y is fixed. Can be done.

Although not shown, the laser head unit 3 is rotated in the width direction X by rotating both the first motor 56 and the second motor 57 clockwise at the same speed in a plan view and winding the belt 54 clockwise. The counter weight 4 can be moved to the second Y-axis guide member 52 side along the width direction X, and can be moved to the first Y-axis guide member 51 side along the width direction X.

FIG. 3B is a diagram showing a state in which the laser head unit 3 is moved downstream along the transport direction Y. When the laser head unit 3 is moved downstream along the transport direction Y, the first motor 56 is rotated counterclockwise in a plan view, the belt 54 is wound counterclockwise by the first motor 56, and the first motor 56 is wound. The two motors 57 are rotated clockwise in a plan view and at the same speed as the first motor 56, and the belt 54 is wound clockwise by the second motor 57. As a result, the X-axis guide member 53, the laser head unit 3, and the counterweight 4 move downstream along the transport direction Y. At this time, by rotating the first motor 56 and the second motor 57 in opposite directions and at the same speed, the speed of the belt 54 sent from the first motor 56 to the first crossing section 541 and the speed of the belt 54 sent from the second motor 57 to the second motor 57. Since the speed of the belt 54 sent out to the 1 crossing section 541 becomes equal, the X-axis guide member 53, while fixing the positions of the laser head unit 3 and the counter weight 4 along the width direction X with respect to the X-axis guide member 53, The laser head unit 3 and the counter weight 4 can be moved downstream along the transport direction Y.

Although not shown, the first motor 56 is rotated clockwise in a plan view, the belt 54 is wound clockwise by the first motor 56, and the second motor 57 is rotated counterclockwise in a plan view. By winding the belt 54 counterclockwise by the second motor 57, the X-axis guide member 53 keeps the positions of the laser head unit 3 and the counter weight 4 along the width direction X with respect to the X-axis guide member 53. , The laser head unit 3 and the counter weight 4 can be moved upstream along the transport direction Y.

In the laser processing apparatus 1, the laser head unit 3 is formed by combining the operations of the motors 56 and 57 as shown in FIGS. 3A and 3B, that is, by independently controlling the rotation direction and speed of the motors 56 and 57. Can be moved in a horizontal plane including the transport direction Y and the width direction X.

FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. More specifically, FIG. 4 is a cross-sectional view taken along the transport direction Y including the first fixing portion 543 for the laser head unit 3 and the second fixing portion 544 for the counterweight 4.

As shown in FIG. 4, the upstream guide member 531 and the downstream guide member 532 are rectangular in cross-sectional view. The lengths of the upstream guide member 531 and the downstream guide member 532 along the height direction Z in the cross-sectional view are substantially the same. Further, the heights of the upper end surface 531a of the upstream guide member 531 and the upper end surface 532a of the downstream guide member 532 along the height direction Z are substantially equal, and the lower end surface 531b of the upstream guide member 531 and the downstream guide member 532. The heights of the lower end surfaces 532b of the above along the height direction Z are substantially equal.

The first X-axis guide rail 535 has an upward convex shape in a cross-sectional view, and is provided on the downstream side of the upper end surface 531a of the upstream side guide member 531 in the transport direction Y. The second X-axis guide rail 536 has an upward convex shape in a cross-sectional view, and is provided on the upstream side of the upper end surface 532a of the downstream side guide member 532 in the transport direction Y. Therefore, the heights of these guide rails 535 and 536 along the height direction Z are substantially equal. Further, the third X-axis guide rail 537 is convex upward in a cross-sectional view, and is provided on the downstream side of the lower end surface 532b of the downstream side guide member 532 in the transport direction Y. Therefore, the height of the third X-axis guide rail 537 along the height direction Z is lower than the height of the guide rails 535 and 536 along the height direction Z.

The laser head unit 3 includes a columnar laser head 31 extending along the height direction Z, a columnar head support portion 32 supporting the laser head 31, and a cable 6 extending from the base end portion 31a of the laser head 31. A tubular cable guide 33 to be inserted, a belt fixing portion 34 to which the first fixing portion 543 of the belt 54 is fixed, and a guide support portion 35 for supporting the cable guide 33 are provided.

The laser head 31 collects the laser light transmitted from the laser oscillator via the cable 6 and irradiates the work W from the tip portion 31b along the height direction Z. The length of the laser head 31 along the height direction Z is longer than the length of the guide members 531,532 along the height direction Z in the cross-sectional view. Further, the height of the base end portion 31a of the laser head 31 along the height direction Z is higher than the upper end surfaces 531a and 532a of the guide members 531 and 532, and is along the height direction Z of the tip end portion 31b of the laser head 31. The height is lower than the lower end surfaces 531b and 532b of the guide members 531 and 532.

The head support portion 32 slidably supports the laser head 31 along the height direction Z. The distance along the height direction Z from the tip end portion 31b of the laser head 31 to the work W is appropriately adjusted by a focusing process (not shown). Further, on the upstream side of the head support portion 32 in the transport direction Y, an upstream side runner 321 that fits into the first X-axis guide rail 535 is provided. The upstream runner 321 has a downward concave shape in a cross-sectional view, and slidably fits with the first X-axis guide rail 535 along the extending direction. The upstream side of the laser head unit 3 in the transport direction Y is slidably supported along the width direction X with respect to the upstream guide member 531 by aligning the upstream runner 321 with the first X-axis guide rail 535. Ru.

The cable guide 33 has a conical cylinder shape in which the inner diameter of the tip portion 33a is smaller than the inner diameter of the base end portion 33b. The cable 6 is inserted through the cable guide 33 so that the tip 33a is substantially coaxial with the laser head 31 and the tip 33a is on the laser head 31 side. As shown in FIG. 4, the inner wall surface 33c of the cable guide 33 is a curved surface that curves with a predetermined radius of curvature in a cross-sectional view. By inserting the cable 6 into such a cable guide 33, it is possible to prevent the cable 6 from bending with a radius of curvature smaller than the radius of curvature of the inner wall surface 333c as the laser head 31 moves. Therefore, the radius of curvature of the inner wall surface 33c is designed so as not to exceed the amount of bending allowed for the cable 6. The cable guide 33 is not fixed to the cable 6 and the laser head 31. Therefore, the movement of the laser head 31 and the cable 6 along the height direction Z is not restricted by the cable guide 33.

The belt fixing portion 34 is fixed to the side portion of the head support portion 32 on the downstream side in the transport direction Y. The first crossing section 541 of the belt-shaped belt 54 is arranged between the upstream guide member 531 and the downstream guide member 532 in a state where the width direction thereof is parallel to the height direction Z. Further, the belt 54 is fixed to the belt fixing portion 34 in the first fixing portion 543 defined in the first crossing section 541. Therefore, when the belt 54 is moved, the laser head unit 3 also moves together with the belt 54. As shown in FIG. 4, the lower end surface 541a on the work W side of the first crossing section 541 of the belt 54 is above the lower end surface 531b of the upstream guide member 531 and the lower end surface 532b of the downstream guide member 532 in a side view. It is placed on the side.

Further, on the downstream side of the belt fixing portion 34 in the transport direction Y, a downstream runner 341 that fits into the second X-axis guide rail 536 is provided. The downstream runner 341 has a downward concave shape in a cross-sectional view, and slidably fits with the second X-axis guide rail 536 along the extending direction. The downstream side of the laser head unit 3 in the transport direction Y is slidably supported along the width direction X with respect to the downstream guide member 532 by aligning the downstream runner 341 with the second X-axis guide rail 536. Ru. As described above, the laser head unit 3 is supported by both holdings from the upstream side and the downstream side in the transport direction Y by the upstream side guide member 531 and the downstream side guide member 532 provided on both sides thereof.

The guide support portion 35 has an arm shape extending along the height direction Z, and by connecting the upper portion of the belt fixing portion 34 and the tip portion 33a of the cable guide 33, the cable guide 33 shakes with respect to the laser head 31. Suppress.

As described above, the laser head unit 3 is configured by combining a plurality of parts such as a laser head 31, a head support portion 32, a cable guide 33, a belt fixing portion 34, and a guide support portion 35. The shape and weight of the parts constituting the laser head unit 3 are such that the position of the center of gravity P of the laser head unit 3 is between the upper end surfaces 531a, 532a and the lower end surfaces 531b, 532b of the guide members 531 and 532 in the side view. Designed to be placed.

The counterweight 4 includes a columnar weight 41 and a weight support portion 42 that supports the weight 41.

The weight support portion 42 has a plate shape extending along the width direction X. A weight 41 is fixed to the side surface of the weight support portion 42 on the downstream side in the transport direction Y, and a runner 43 to be fitted to the third X-axis guide rail 537 is provided on the side surface of the weight support portion 42 on the upstream side in the transport direction Y. Has been done. The runner 43 has a downward concave shape in a cross-sectional view, and slidably fits with the third X-axis guide rail 537 along the extending direction. The upstream side of the counterweight 4 in the transport direction Y is slidably supported along the width direction X with respect to the downstream guide member 532 by aligning the runner 43 with the third X-axis guide rail 537.

The weight of the weight 41 is set so that the weight of the counter weight 4 as a whole and the weight of the laser head unit 3 as a whole are substantially equal to each other. As a result, it is possible to suppress the shaking of the laser head unit 3 when the X-axis guide member 53 is moved along the transport direction Y together with the laser head unit 3 and the counterweight 4 supported by the X-axis guide member 53.

The second crossing section 542 of the belt-shaped belt 54 is arranged on the downstream side of the downstream side guide member 532 in the transport direction Y in a state where the width direction thereof is parallel to the height direction Z. Further, the belt 54 is fixed to the weight support portion 42 at the second fixing portion 544 defined in the second crossing section 542. Therefore, when the belt 54 is moved, the counterweight 4 moves together with the belt 54. As shown in FIG. 4, the lower end surface 542a on the work W side of the second crossing section 542 of the belt 54 is above the lower end surface 531b of the upstream guide member 531 and the lower end surface 532b of the downstream guide member 532 in a side view. It is placed on the side.

According to the laser processing apparatus 1 according to the present embodiment, the following effects are obtained.
(1) In the laser processing apparatus 1, the upstream guide member 531 and the downstream guide member 532 arranged on the upstream side and the downstream side of the transport direction Y in a plan view of the laser head unit 3 that irradiates the work W with the laser beam. It is slidably supported along the width direction X and is moved along the width direction X by winding the belt 54 fixed to the laser head unit 3. That is, in the laser processing apparatus 1, by supporting the laser head unit 3 by holding both from the upstream side and the downstream side in the transport direction Y, it is possible to suppress the shaking of the laser head unit 3 during movement. Further, in the laser processing apparatus 1, the first crossing section 541, which is a portion of the belt 54 arranged above the work W and including the first fixing portion 543 with respect to the laser head unit 3, is referred to as an upstream guide member 531 in a plan view. It is arranged between the downstream side guide member 532, and the lower end surface 541a of the first crossing section 541 is arranged above the lower end surface 531b of the upstream side guide member 531 in a side view. Therefore, according to the laser processing device 1, even when the work W1 (see the broken line in FIG. 4) warped toward the laser head unit 3 side is conveyed by the work transfer device 2, before the work W1 comes into contact with the belt 54. Since it comes into contact with the upstream guide member 531 in the air, damage to the belt 54 can be suppressed.

(2) In the laser processing apparatus 1, the counterweight 4 is slidably supported along the width direction X by the downstream guide member 532 on the downstream side in the transport direction Y from the downstream guide member 532, and the belt 54 It is fixed to the second fixing portion 544 defined in the second crossing section 542 of the above. As a result, the counterweight 4 moves in the opposite direction to the laser head unit 3 in conjunction with the movement of the laser head unit 3 along the width direction X. Further, by providing the counterweight 4 at such a position, the laser head unit when the upstream guide member 531 and the downstream guide member 532 are moved together with the laser head unit 3 and the counterweight 4 along the transport direction Y. The shaking of 3 can be suppressed. Further, in the laser processing apparatus 1, the second crossing section 542 of the belt 54 is arranged on the downstream side in the transport direction Y from the downstream side guide member 532 in a plan view, and the lower end surface 542a of the second crossing section 542 is provided on the side surface. Visually, it is arranged above the lower end surface 532b of the downstream guide member 532. Therefore, according to the laser processing apparatus 1, even when the end portion of the work W2 (see the alternate long and short dash line in FIG. 4) processed by the laser beam is warped toward the laser head unit 3, the end portion of the work W2 is a belt. Since the downstream guide member 532 is contacted before the second cross section 542 of the 54 is contacted, damage to the belt 54 can be further suppressed.

(3) In the laser processing apparatus 1, the position of the center of gravity P of the laser head unit 3 is arranged between the upper end surfaces 531a, 532a and the lower end surfaces 531b, 532b of the guide members 531 and 532 in the side view. As a result, the shaking of the laser head unit 3 during movement can be further suppressed.

Although one embodiment of the present invention has been described above, the present invention is not limited to this. Within the scope of the present invention, the detailed configuration may be changed as appropriate.

1 ... Laser processing equipment 2 ... Work transfer equipment 3 ... Laser head unit (machining tool)
31 ... Laser head 32 ... Head support part 34 ... Belt fixing part 4 ... Counterweight 5 ... Head drive mechanism 51 ... First Y-axis guide member 52 ... Second Y-axis guide member 53 ... X-axis guide member 531 ... Upstream guide member 531a ... Upper end surface 531b ... Lower end surface 532 ... Downstream guide member 532a ... Upper end surface 532b ... Lower end surface 54 ... Belt (endless winding member)
541 ... First crossing section (first section)
541a ... Lower end surface 542 ... Second crossing section (second section)
542a ... Lower end surface 543 ... 1st fixed part 544 ... 2nd fixed part 55 ... Moving mechanism 56 ... 1st motor 57 ... 2nd motor 6 ... Cable W ... Work Y ... Transport direction X ... Width direction Z ... Height direction

Claims (3)

A work transfer device that conveys the work along the transfer direction,
A processing tool that irradiates the work with laser light from above to process the work,
An upstream guide member and a downstream guide member that extend above the work along a width direction intersecting the transport direction and slidably support the machining tool along the width direction.
An endless winding member that is hung along the width direction above the work and is fixed to the processing tool at least in part.
A laser machining apparatus comprising a moving mechanism for moving the machining tool along the width direction by winding the endless winding member.
The processing tool is arranged between the upstream guide member and the downstream guide member in a plan view.
The first section of the endless winding member, which is arranged above the work and includes the first fixing portion for the machining tool, is between the upstream guide member and the downstream guide member in a plan view. Placed in
A laser processing apparatus characterized in that the lower end surface on the work side of the first section is arranged above the lower end surface of the upstream guide member in a side view. Further, a counterweight provided slidably along the width direction with respect to the downstream guide member on the downstream side in the transport direction from the downstream guide member is further provided.
The counterweight is fixed at the second fixing portion with respect to the second section of the endless winding member, which is arranged above the work and is a portion different from the first section.
The second section is arranged on the downstream side in the transport direction from the downstream side guide member in a plan view.
The laser processing apparatus according to claim 1, wherein the lower end surface on the work side of the second section is arranged above the lower end surface of the downstream guide member in a side view. The laser processing apparatus according to claim 1 or 2, wherein the position of the center of gravity of the processing tool is arranged between the upper end surface and the lower end surface of the upstream side and downstream side guide members in a side view.

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