Slag conveyor, laser processing device, and workpiece processing method

Abstract

The present application provides a slag conveying machine, a laser processing device, and a workpiece processing method. The slag conveying machine is provided with a set of conveying plates including a first conveying plate extending in a first direction and a second conveying plate arranged adjacent to the first conveying plate and extending in the first direction, and conveys slag generated by irradiating a laser to a workpiece. The first conveying plate includes a first front end portion, a first rear end portion, and a first intermediate portion having a first recess extending in the first direction and connecting the first front end portion and the first rear end portion.

Description

Technical Field

[0001] This invention relates to a slag-coating conveyor, a laser processing device, and a workpiece processing method. Background Technology

[0002] A laser processing machine that includes a chip conveyor is known.

[0003] As a related technology, Patent Document 1 discloses a chip conveyor for a laser processing machine. The chip conveyor described in Patent Document 1 has multiple plates constituting a conveyor belt. Each plate is flexibly connected to the other plates via joints.

[0004] Patent Document 1: Microfilm of Japanese Patent Application No. 3-19091 (Japanese Patent Application No. 4-108984) Summary of the Invention

[0005] The purpose of this invention is to provide a slag-carrying conveyor, a laser processing device, and a workpiece processing method that can suppress thermal deformation of the conveyor plate.

[0006] In some embodiments, the slag conveyor includes a set of conveyor plates comprising a first conveyor plate extending along a first direction and a second conveyor plate disposed adjacent to the first conveyor plate and extending along the first direction, for conveying slag generated by irradiating a workpiece with a laser. The first conveyor plate includes: a first front end portion; a first rear end portion; and a first intermediate portion having a first recess extending along the first direction and connecting the first front end portion and the first rear end portion.

[0007] Some embodiments of the laser processing apparatus include: a laser irradiation device comprising a laser head for irradiating a workpiece with laser light; a moving device for moving the laser head relative to a workpiece support member supporting the workpiece; a control device for controlling the laser irradiation device and the moving device; and a slag conveyor. The slag conveyor includes a set of conveyor plates, the set of conveyor plates including a first conveyor plate extending along a first direction, and a second conveyor plate disposed adjacent to the first conveyor plate and extending along the first direction, for conveying slag generated by irradiating the workpiece with laser light. The first conveyor plate includes: a first front end portion; a first rear end portion; and a first intermediate portion having a first recess extending along the first direction and connecting the first front end portion and the first rear end portion.

[0008] Some embodiments of the workpiece processing method include: a step of processing the workpiece by irradiating it with a laser; and a step of conveying slag generated by irradiating the workpiece with the laser using a set of conveyor plates, including a first conveyor plate extending in a first direction and a second conveyor plate disposed adjacent to the first conveyor plate and extending in the first direction. The first conveyor plate includes: a first front end portion; a first rear end portion; and a first intermediate portion having a first recess extending in the first direction and connecting the first front end portion and the first rear end portion. The step of processing the workpiece is performed while the direction of thermal deflection of the first intermediate portion by irradiating the first recess portion with the laser is opposite to the direction of thermal deflection of the first front end portion by irradiating the first front end portion with the laser, thereby suppressing thermal deflection of the first conveyor plate.

[0009] According to the present invention, a slag-coated conveyor, a laser processing apparatus, and a workpiece processing method that can suppress thermal deformation of the conveyor plate can be provided. Attached Figure Description

[0010] Figure 1 This is a schematic cross-sectional view of the laser processing apparatus in the first embodiment. Figure 2 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the first embodiment. Figure 3 This is a schematic cross-sectional view illustrating an example of a first conveyor plate. Figure 4 This is a schematic perspective view of an example of a first conveyor plate. Figure 5 This is a schematic perspective view of the conveyor plate in the comparative example. Figure 6 It is a schematic three-dimensional diagram showing the thermal deflection of the first recess in the fourth direction caused by irradiating the first recess with a laser. Figure 7 It is a schematic three-dimensional diagram illustrating the situation where the first front end is thermally deflected in a third direction due to the irradiation of the first front end with a laser. Figure 8 This is a schematic perspective view of the laser processing apparatus in the first embodiment. Figure 9 It is a schematic perspective view showing a set of conveyor plates, including a first conveyor plate and a second conveyor plate, that can move along a circular track. Figure 10 This is a schematic perspective view of the slag conveyor in the first embodiment. Figure 11 It is an exploded perspective view schematically representing a portion of a set of conveyor plates. Figure 12 This diagram schematically illustrates the installation of a first conveyor plate on a first annular chain and a second annular chain. Figure 13 This is an enlarged schematic cross-sectional view of the turning section of the slag conveyor in the first embodiment. Figure 14 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the first embodiment. Figure 15 This is a schematic perspective view illustrating an example of a first and second conveyor plate. Figure 16 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the first embodiment. Figure 17 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the first embodiment. Figure 18 This is a schematic perspective view illustrating an example of a first and second conveyor plate. Figure 19 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the first embodiment. Figure 20 This is a schematic perspective view illustrating an example of a first and second conveyor plate. Figure 21 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the first embodiment. Figure 22 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the first embodiment. Figure 23 This is a schematic perspective view illustrating an example of a first and second conveyor plate. Figure 24 This is a schematic top view illustrating an example of a first conveyor plate. Figure 25 It is a schematic cross-sectional view representing a portion of a set of conveyor plates. Figure 26 It is a schematic cross-sectional view of a set of conveyor plates encircling a track, including a ramp. Figure 27 This is a schematic, schematic side view of the laser processing apparatus in the first embodiment. Figure 28 This is a schematic top view illustrating a portion of the laser processing apparatus in the first embodiment. Figure 29 This is a schematic perspective view illustrating an example of a workpiece support component. Figure 30 This is a schematic perspective view of the laser processing apparatus in a first variation of the first embodiment. Figure 31 It is a schematic top view showing the process of removing the finished workpiece from the workpiece support member. Figure 32 This is a schematic perspective view of the laser processing apparatus in a second variation of the first embodiment. Figure 33 This diagram schematically illustrates a situation where a control device can control multiple controlled objects. Figure 34 This is a schematic, schematic side view of the laser processing apparatus in the first embodiment. Figure 35 It is a schematic cross-sectional view of a portion of a laser processing apparatus that includes a cooling device. Figure 36 This is a schematic cross-sectional view of the laser processing apparatus in the second embodiment. Figure 37 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the second embodiment. Figure 38 It is an exploded perspective view schematically representing a portion of a set of conveyor plates. Figure 39 It is a schematic perspective view showing a set of conveyor plates, including a first conveyor plate and a second conveyor plate, that can move along a circular track. Figure 40 This is a schematic cross-sectional view showing a portion of the laser processing apparatus in the second embodiment. Figure 41 It is an exploded perspective view schematically representing a portion of a set of conveyor plates. Figure 42 It is a schematic cross-sectional view representing a portion of a set of conveyor plates. Figure 43 This is a flowchart illustrating an example of the workpiece processing method in the third embodiment. Detailed Implementation

[0011] Hereinafter, the slag conveyor 2, the laser processing device 1, and the workpiece processing method in the embodiments will be described with reference to the accompanying drawings. Furthermore, in the following description of the embodiments, parts and components with the same function will be labeled with the same reference numerals, and repeated descriptions of parts and components labeled with the same reference numerals will be omitted.

[0012] (Definition of the term) like Figure 2As illustrated, each of the set of conveyor plates 3 has a conveying surface 3u. In this specification, a conveying surface refers to the surface that directly or indirectly supports the slag during conveying. More specifically, the conveying surface 3u is the surface that faces approximately upwards during slag conveying. For example, when slag is conveyed by the first conveyor plate 3-1, the first conveying surface 3u-1 of the first conveyor plate 3-1 directly or indirectly supports the slag. The first conveying surface 3u-1 of the first conveyor plate 3-1 faces approximately upwards during slag conveying. Similarly, when slag is conveyed by the second conveyor plate 3-2, the second conveying surface 3u-2 of the second conveyor plate 3-2 directly or indirectly supports the slag. The second conveying surface 3u-2 of the second conveyor plate 3-2 faces approximately upwards during slag conveying.

[0013] like Figure 2 As illustrated, each of the conveyor plates 3 has a back surface 3n. In this specification, a back surface refers to the side opposite to the conveying surface 3u in each conveyor plate. More specifically, the back surface 3n is the side that faces generally downward when conveying slag. For example, the first back surface 3n-1 of the first conveyor plate 3-1 is the side located below the first conveying surface 3u-1 when slag is conveyed by the first conveyor plate 3-1. When slag is conveyed by the first conveyor plate 3-1, the first back surface 3n-1 of the first conveyor plate 3-1 faces generally downward. Similarly, the second back surface 3n-2 of the second conveyor plate 3-2 is the side located below the second conveying surface 3u-2 when slag is conveyed by the second conveyor plate 3-2. More specifically, when slag is conveyed by the second conveyor plate 3-2, the second back surface 3n-2 of the second conveyor plate 3-2 faces generally downward.

[0014] In this specification, the area reachable by the laser emitted from the laser irradiation device 60 is defined as the "processing area RG1" (refer to...). Figure 1 The workpiece W, positioned in the processing area RG1, is laser-processed (more specifically, cut or perforated). The dross generated by irradiating the workpiece W with a laser is received in the processing area RG1 by a set of conveyor plates 3.

[0015] (Definition of direction) In this specification, the extending direction of the first conveyor plate 3-1 (or the extending direction of each conveyor plate 3) is defined as the first direction DR1. In this specification, the moving direction of a group of conveyor plates 3 (or the moving direction of each conveyor plate 3) is defined as the second direction DR2. For example... Figure 9 As illustrated, in this specification, the inner side of the surrounding track OB of a set of conveyor plates 3 (refer to the inner side of the track OB) will be used. Figure 9The direction (with the shaded area formed by dots) towards the outside of the orbit OB is defined as the third direction DR3, and the direction opposite to the third direction DR3 is defined as the fourth direction DR4. For example... Figure 2 As illustrated, the third-direction DR3 is the direction from the first back surface 3n-1 of the first conveyor plate 3-1 toward the first conveying surface 3u-1 of the first conveyor plate 3-1. Furthermore, the third-direction DR3 is the direction from the second back surface 3n-2 of the second conveyor plate 3-2 toward the second conveying surface 3u-2 of the second conveyor plate 3-2. Figure 2 As illustrated, the fourth direction DR4 is from the first conveying surface 3u-1 of the first conveyor plate 3-1 toward the first back surface 3n-1 of the first conveyor plate 3-1. Furthermore, the fourth direction DR4 is from the second conveying surface 3u-2 of the second conveyor plate 3-2 toward the second back surface 3n-2 of the second conveyor plate 3-2.

[0016] (First Implementation) Reference Figures 1 to 35 The slag conveyor 2A and the laser processing device 1A in the first embodiment will be described. Figure 1 This is a schematic cross-sectional view of the laser processing apparatus 1A in the first embodiment. Figure 2 This is a schematic cross-sectional view showing a portion of the laser processing apparatus 1A in the first embodiment. Figure 3 This is a schematic cross-sectional view of an example of the first conveyor plate 3-1. Figure 4 This is a schematic perspective view of an example of the first conveyor plate 3-1. Figure 5 This is a schematic perspective view of the conveyor plate 3' in the comparative example. Figure 6 It is a schematic perspective view showing the thermal deflection of the first recess Q1 in the fourth direction DR4 caused by the irradiation of the first recess Q1 with laser LB. Figure 7 It is a schematic perspective view showing the situation where the first front end 3f-1 is thermally deflected in the third direction DR3 due to the irradiation of the first front end 3f-1 with laser LB. Figure 8 This is a schematic perspective view of the laser processing apparatus 1A in the first embodiment. Figure 9 It is a schematic perspective view showing a set of conveyor plates 3, including a first conveyor plate 3-1 and a second conveyor plate 3-2, that can move along the surrounding track OB. Figure 10 This is a schematic perspective view of the slag conveyor 2A in the first embodiment. Figure 11 It is an exploded perspective view schematically representing a portion of a set of conveyor plates 3. Figure 12 This is a schematic diagram showing the first conveyor plate 3-1 installed on the first annular chain 21a and the second annular chain 22a. Figure 13This is an enlarged schematic cross-sectional view of the turning section of the slag conveyor 2A in the first embodiment. Figure 14 This is a schematic cross-sectional view showing a portion of the laser processing apparatus 1A in the first embodiment. Figure 15 This is a schematic perspective view of an example of the first conveyor plate 3-1 and the second conveyor plate 3-2. Figure 16 and Figure 17 This is a schematic cross-sectional view showing a portion of the laser processing apparatus 1A in the first embodiment. Figure 18 This is a schematic perspective view of an example of the first conveyor plate 3-1 and the second conveyor plate 3-2. Figure 19 This is a schematic cross-sectional view showing a portion of the laser processing apparatus 1A in the first embodiment. Figure 20 This is a schematic perspective view of an example of the first conveyor plate 3-1 and the second conveyor plate 3-2. Figure 21 and Figure 22 This is a schematic cross-sectional view showing a portion of the laser processing apparatus 1A in the first embodiment. Figure 23 This is a schematic perspective view of an example of the first conveyor plate 3-1 and the second conveyor plate 3-2. Figure 24 This is a schematic top view illustrating an example of the first conveyor plate 3-1. Figure 25 It is a schematic cross-sectional view showing a portion of a set of conveyor plates 3. Figure 26 This is a schematic cross-sectional view showing a set of conveyor plates 3 encircling the track OB, including the ramp CL. Figure 27 This is a schematic side view of the laser processing apparatus 1A in the first embodiment. Figure 28 This is a schematic top view showing a portion of the laser processing apparatus 1A in the first embodiment. Figure 29 This is a schematic perspective view of an example of a workpiece support member 90. Figure 30 This is a schematic perspective view of the laser processing apparatus 1A in a first variation of the first embodiment. Figure 31 It is a schematic top view showing the process of removing the finished workpiece Wb from the workpiece support member 90. Figure 32 This is a schematic perspective view of the laser processing apparatus 1A in a second variation of the first embodiment. Figure 33 This diagram schematically illustrates a situation where control device 8 can control multiple controlled objects. Figure 34 This is a schematic side view of the laser processing apparatus 1A in the first embodiment. Figure 35 This is a schematic cross-sectional view of a portion of a laser processing apparatus including a cooling device 95.

[0017] like Figure 2 As illustrated, the slag conveyor 2A in the first embodiment includes a set of conveyor plates 3.

[0018] A set of conveyor plates 3 transports the slag D generated by irradiating the workpiece W with laser LB. In addition to transporting the slag D, the set of conveyor plates 3 can also transport the cut pieces CF generated by irradiating the workpiece W with laser LB.

[0019] Additionally, in this specification, dross refers to an irregularly shaped block (in other words, a block of random shape) formed by the solidification of material (more specifically, metallic material) melted by laser irradiation.

[0020] A set of conveyor plates 3 includes a first conveyor plate 3-1 extending along a first direction DR1 and a second conveyor plate 3-2 extending along the first direction DR1. Each of the conveyor plates 3 is an elongated plate with the first direction DR1 as its long side. Figure 2 In the example described, the second conveyor plate 3-2 is arranged adjacent to the first conveyor plate 3-1.

[0021] The first conveyor plate 3-1 has a front end (hereinafter referred to as "first front end 3f-1"), a rear end (hereinafter referred to as "first rear end 3e-1"), and a middle portion (hereinafter referred to as "first middle portion 3m-1"). Additionally, in Figure 2 In the example described, the first front end 3f-1 is the end on the front side of the movement direction (in other words, the end on the second direction DR2 side), and the first rear end 3e-1 is the end on the rear side of the movement direction (in other words, the end on the opposite side of the second direction DR2).

[0022] The first intermediate portion 3m-1 connects the first front end portion 3f-1 and the first rear end portion 3e-1. Additionally, in Figure 3 In order to make it easier to grasp the first middle part 3m-1, a shadow formed by points is added to the first middle part 3m-1.

[0023] like Figure 3 As illustrated, the first intermediate portion 3m-1 has a first recess Q1. (As...) Figure 4 As illustrated, the first recess Q1 extends along the first direction DR1.

[0024] exist Figure 2 In the example described, the laser LB passing through workpiece W reaches the slag-coating conveyor 2A. Part of the energy of the laser LB is converted into heat energy, which is used to heat up the first conveyor plate 3-1. The first conveyor plate 3-1 undergoes thermal deformation due to this heating, deflecting in either the third direction DR3 or the fourth direction DR4.

[0025] Conveyor plate 3' in the comparative example (refer to) Figure 5The first intermediate portion 3m-1 is entirely flat. In this case, compared to the case where the first intermediate portion 3m-1 has a first recess Q1, the thermal deformation of the conveyor plate 3' due to heating is greater. In particular, due to (1) the high power of the laser LB (or the high energy density of the laser LB), (2) the long length of the conveyor plate 3' along the first direction DR1, (3) the large area of ​​the first intermediate portion 3m-1 (in other words, the area of ​​the flat portion), and (4) the close distance between the workpiece and the slag conveyor, there is a possibility that the thermal deformation of the conveyor plate 3' is too large. In addition, there is a possibility that the excessive thermal deformation of the conveyor plate 3' may hinder the smooth movement of the set of conveyor plates containing the conveyor plate 3'.

[0026] In the slag-coating conveyor 2A of the first embodiment, the first recess Q1 suppresses excessive deflection of the first conveyor plate 3-1 in the third direction DR3 or the fourth direction DR4 caused by laser irradiation. Therefore, a set of conveyor plates 3 including the first conveyor plate 3-1 can move smoothly.

[0027] like Figure 1 As illustrated, the laser processing apparatus 1A in the first embodiment includes the aforementioned slag conveyor 2A, a laser irradiation device 60 comprising a laser head 61 that irradiates the workpiece W with laser LB, a moving device 7 that moves the laser head 61 relative to a workpiece support member 90 supporting the workpiece W, and a control device 8 that controls the laser irradiation device 60 and the moving device 7. Furthermore, the control device 8 can function as a single computer, or it can function as a control device 8 through the cooperation of multiple computers.

[0028] The laser processing apparatus 1A in the first embodiment achieves the same effect as the slag conveyor 2A in the first embodiment.

[0029] (arbitrarily added structure) Next, refer to Figures 1 to 35 Any additional structures that may be used in the slag conveyor 2A and laser processing device 1A in the first embodiment (or the slag conveyor 2B and laser processing device 1B in the second embodiment described later) will be described.

[0030] (First recess Q1) exist Figure 3 In the described example, the first recess Q1 is a recess that is recessed in the fourth direction DR4. In other words, the first recess Q1 is a recess that is recessed in the direction from the first conveying surface 3u-1 of the first conveying plate 3-1 toward the first back surface 3n-1 of the first conveying plate 3-1. Figure 3In the described example, the first recess Q1 is located further along the fourth direction DR4 side than the first front end portion 3f-1. Furthermore, the first recess Q1 is located further along the fourth direction DR4 side than the first rear end portion 3e-1. The first recess Q1 has a conveying surface for conveying slag and a back surface disposed on the side opposite to the conveying surface.

[0031] The conveying surface of the first recess Q1 is a concave conveying surface SD1 that is recessed in the fourth direction DR4. Figure 3 In the described example, the concave conveying surface SD1 has a generally arcuate shape in a cross-section perpendicular to the first direction DR1. Alternatively, the concave conveying surface SD1 may have a generally V-shaped shape, a generally U-shaped shape, or other shapes in a cross-section perpendicular to the first direction DR1.

[0032] The back side of the first recess Q1 is a protruding surface SN1 that protrudes in the fourth direction DR4. Figure 3 In the described example, the protruding surface SN1 has a generally arcuate shape in a cross-section perpendicular to the first direction DR1. Alternatively, the protruding surface SN1 may have a generally V-shaped shape, a generally U-shaped shape, or other shapes in a cross-section perpendicular to the first direction DR1.

[0033] like Figure 6 As illustrated, if laser LB is irradiated onto the first recess Q1 of the first conveyor plate 3-1, the first intermediate portion 3m-1 (or the first conveyor plate 3-1) thermally flexes in the fourth direction DR4. Additionally, in Figure 6 The text emphasizes the deflection of the first conveyor plate 3-1 compared to the actual deflection.

[0034] like Figure 7 As illustrated, if laser LB is irradiated onto the first front end 3f-1 of the first conveyor plate 3-1, the first front end 3f-1 (or the first conveyor plate 3-1) thermally flexes in the third direction DR3. Additionally, in Figure 7 The text emphasizes the deflection of the first conveyor plate 3-1 compared to the actual deflection.

[0035] exist Figure 6 and Figure 7In the described example, the direction of thermal deflection of the first front end 3f-1 caused by irradiating it with laser LB is opposite to the direction of thermal deflection of the first middle portion 3m-1 caused by irradiating it with laser LB into the first recess Q1. Therefore, if the first conveyor plate 3-1 moves in the second direction DR2 across the laser LB, at least a portion of the deflection caused by irradiating the first front end 3f-1 with laser is offset by the deflection caused by irradiating the first middle portion 3m-1 with laser. Thus, the overall deflection of the first conveyor plate 3-1 is reduced, suppressing changes in the relative position of the first rear end 3e-1 of the first conveyor plate 3-1 and the second front end 3f-2 of the second conveyor plate 3-2. As a result, a set of conveyor plates 3 including the first conveyor plate 3-1 can move smoothly.

[0036] (Slag Conveyor 2A) exist Figure 1 In the example described, a portion of the slag-coating conveyor 2A is positioned directly below the laser irradiation device 60. Furthermore, a set of conveyor plates 3 of the slag-coating conveyor 2A is configured to move across the processing area RG1 (more specifically, the area directly below the laser irradiation device 60).

[0037] exist Figure 1 In the documented example, a set of conveyor plates 3 transports slag from processing area RG1 to discharge area RG2. Figure 1 In the described example, a set of conveyor plates 3 rotates (more specifically, rotates 180 degrees about a horizontal axis) in the discharge zone RG2. As a result, the slag D conveyed by the set of conveyor plates 3 is discharged from the set of conveyor plates 3 into the container 13 in the discharge zone RG2. Additionally, the cut piece CF (see reference...) is conveyed by the set of conveyor plates 3... Figure 2 In the case of ), the cut piece CF is also discharged from a set of conveyor plates 3 to container 13 in the discharge area RG2.

[0038] exist Figure 8 In the described example, the slag-hanging conveyor 2A includes a first annular component 21, a second annular component 22, and a drive unit 29. The first annular component 21 and the second annular component 22 support a set of conveyor plates 3. More specifically, a set of conveyor plates 3 is mounted on the first annular component 21 and the second annular component 22.

[0039] The first annular member 21 and the second annular member 22 are driven directly or indirectly by the drive device 29. More specifically, the first annular member 21 is driven directly or indirectly by the drive device 29 to move along the first circular track B1 (see reference). Figure 9 The second annular member 22 is driven directly or indirectly by the drive device 29 to travel along the second annular track B2 (see reference 1) which is parallel to the first annular track B1. Figure 9The distance between the first orbital track B1 and the second orbital track B2 (in other words, the distance between the first orbital track B1 and the second orbital track B2 in the direction along the first direction DR1) is, for example, more than 1m and less than 3m.

[0040] exist Figure 10 In the recorded example, the first ring member 21 is the first ring chain 21a, and the second ring member 22 is the second ring chain 22a. Figure 10 In the described example, the slag-hanging conveyor 2 has a plurality of sprockets 28, including a first sprocket 28a, a second sprocket 28b, a third sprocket 28c, and a fourth sprocket 28d. A first annular chain 21a engages at least with the first sprocket 28a and the second sprocket 28b (more specifically, the first annular chain 21a is at least wound around the first sprocket 28a and the second sprocket 28b). Furthermore, a second annular chain 22a engages at least with the third sprocket 28c and the fourth sprocket 28d (more specifically, the second annular chain 22a is at least wound around the third sprocket 28c and the fourth sprocket 28d).

[0041] exist Figure 10 In the recorded example, the first annular chain 21a is driven by the drive device 29 at least by the first sprocket 28a, and the second annular chain 22a is driven by the drive device 29 at least by the third sprocket 28c.

[0042] A set of conveyor plates 3 moves along the circular track OB. For example... Figure 9 As illustrated, the surrounding track OB of a set of conveyor plates 3 is parallel to the first surrounding track B1 of the first annular chain 21a and parallel to the second surrounding track B2 of the second annular chain 22a.

[0043] (A set of conveyor plates 3) like Figure 2 As illustrated, a set of conveyor plates 3 respectively conveys a portion of multiple slag flakes D generated by irradiating the workpiece W with a laser LB, and the slag flakes are heated by the laser LB. For example, the first conveyor plate 3-1 and the second conveyor plate 3-2 respectively convey a portion of the multiple slag flakes D generated by irradiating the workpiece W with a laser LB, and the slag flakes are heated by the laser LB. A set of conveyor plates 3 can be composed of a single component or an assembly of multiple components.

[0044] exist Figure 2 In the described example, the slag-hanging conveyor 2A has a set of conveyor plates 3 comprising a first conveyor plate 3-1, a second conveyor plate 3-2, and a third conveyor plate 3-3. The set of conveyor plates 3 extends along a first direction DR1. The number of conveyor plates 3 included in the set of conveyor plates 3 is, for example, 20 or more, 50 or more, or 80 or more. In this specification, the number of conveyor plates 3 included in the set of conveyor plates 3 is defined as "N". "N" is, for example, a natural number of 20 or more.

[0045] When "K" is defined as any natural number greater than 1 and less than "N-1", the (K+1)th conveyor plate is arranged adjacent to the Kth conveyor plate. Furthermore, the first conveyor plate 3-1 is arranged adjacent to the Nth conveyor plate. Thus, the entire set of conveyor plates 3 is arranged in a ring. For example, the second conveyor plate 3-2 is arranged adjacent to the first conveyor plate 3-1 and adjacent to the third conveyor plate 3-3.

[0046] A set of conveyor plates 3 each has a front end 3f, a rear end 3e, and a middle portion 3m connecting the front end 3f and the rear end 3e. Additionally, in Figure 2 In the example described, the front end 3f of each conveyor plate 3 is the end on the front side of the movement direction (in other words, the end on the side of the second direction DR2), and the rear end 3e of each conveyor plate 3 is the end on the rear side of the movement direction (in other words, the end on the side opposite to the second direction DR2).

[0047] exist Figure 2 In the described example, the front end 3f of each conveyor plate 3 is configured to overlap with the rear end 3e of another adjacent conveyor plate 3 when viewed from above (in other words, when viewed along the fourth direction DR4), and the rear end 3e of each conveyor plate 3 is configured to overlap with the front end 3f of yet another adjacent conveyor plate when viewed from above (in other words, when viewed along the fourth direction DR4).

[0048] For example, the first front end portion 3f-1 of the first conveyor plate 3-1 is configured to overlap the rear ends portion 3e-N of the other conveyor plates 3-N when viewed from above (in other words, when viewed along the fourth direction DR4). More specifically, the rear ends portion 3e-N of the other conveyor plates 3-N are covered by the first front end portion 3f-1 of the first conveyor plate 3-1.

[0049] For example, the first rear end portion 3e-1 of the first conveyor plate 3-1 is configured to overlap with the second front end portion 3f-2 of the second conveyor plate 3-2 when viewed from above (in other words, when viewed along the fourth direction DR4). More specifically, the first rear end portion 3e-1 of the first conveyor plate 3-1 is covered by the second front end portion 3f-2 of the second conveyor plate 3-2.

[0050] For example, the second rear end portion 3e-2 of the second conveyor plate 3-2 is configured to overlap with the third front end portion 3f-3 of the third conveyor plate 3-3 when viewed from above (in other words, when viewed along the fourth direction DR4). More specifically, the second rear end portion 3e-2 of the second conveyor plate 3-2 is covered by the third front end portion 3f-3 of the third conveyor plate 3-3.

[0051] like Figure 11As illustrated, a set of conveyor plates 3 each has a left end 3a and a right end 3b. Figure 11 In the recorded example, when the conveying surface 3u of the conveying plate 3 is viewed from the rear end 3e toward the front end 3f, the left end 3a of each conveying plate 3 is the left end, and when the conveying surface 3u of the conveying plate 3 is viewed from the rear end 3e toward the front end 3f, the right end 3b of each conveying plate 3 is the right end.

[0052] The first conveyor plate 3-1 has a first front end 3f-1, a first rear end 3e-1, a first intermediate portion 3m-1 connecting the first front end 3f-1 and the first rear end 3e-1, a left end 3a-1 and a right end 3b-1.

[0053] The second conveyor plate 3-2 has a second front end 3f-2, a second rear end 3e-2, a second middle portion 3m-2 connecting the second front end 3f-2 and the second rear end 3e-2, a left end 3a-2 and a right end 3b-2.

[0054] The third conveyor plate 3-3 has a third front end 3f-3, a third rear end 3e-3, a third middle part 3m-3 connecting the third front end 3f-3 and the third rear end 3e-3, a left end 3a-3 and a right end 3b-3.

[0055] The length of each of the conveyor plates 3 (more specifically, the length along the first direction DR1) is, for example, more than 1m and less than 3m. The length L1 of the first conveyor plate 3-1 is, for example, more than 1m and less than 3m, and the length of the second conveyor plate 3-2 is, for example, more than 1m and less than 3m.

[0056] The width of each of the conveyor plates 3 (more specifically, the width of each of the conveyor plates 3 in the direction along the second direction DR2) is, for example, 40 mm or more and 200 mm or less. The width W1 of the first conveyor plate 3-1 is, for example, 40 mm or more and 200 mm or less, and the width W2 of the second conveyor plate 3-2 is, for example, 40 mm or more and 200 mm or less.

[0057] Each of the three conveyor plates has a thickness of, for example, less than 5 mm or less than 3 mm. Figure 3 In the described example, the thickness of the first front end portion 3f-1 of the first conveyor plate 3-1 is approximately fixed, and the thickness of the first rear end portion 3e-1 of the first conveyor plate 3-1 is approximately fixed. Furthermore, the thickness of the first middle portion 3m-1 of the first conveyor plate 3-1 is approximately fixed. Figure 3 In the recorded example, the thickness of the first conveyor plate 3-1 is generally fixed.

[0058] Each set of conveyor plates 3 is made of metal. For example, each set of conveyor plates 3 is made of steel, and more specifically, of hot-rolled mild steel plate, cold-rolled steel plate, or cold-rolled stainless steel plate.

[0059] The left end 3a of each of a set of conveyor plates 3 is mounted to the first annular member 21 (more specifically, the first annular chain 21a). In addition, the right end 3b of each of a set of conveyor plates 3 is mounted to the second annular member 22 (more specifically, the second annular chain 22a).

[0060] exist Figure 11 In the described example, a bolt-insertion hole h1 is formed at the left end 3a-1 of the first conveyor plate 3-1, and a bolt-insertion hole h2 is formed at the right end 3b-1 of the first conveyor plate 3-1. Figure 12 In the recorded example, the left end 3a-1 of the first conveyor plate 3-1 is mounted to the first annular chain 21a by means of bolt BT, and the right end 3b-1 of the first conveyor plate 3-1 is mounted to the second annular chain 22a by means of bolt BT. (As from...) Figure 2 As is known, the first conveyor plate 3-1 is not connected to any adjacent conveyor plates. Therefore, if the first conveyor plate 3-1 is damaged, it is easy to replace the first conveyor plate 3-1 with a new one.

[0061] exist Figure 11 In the described example, the front end 3f of each of the set of conveyor plates 3 has a convex curved portion CP extending along the first direction DR1. Additionally, in Figure 11 In the described example, the front end portion 3f of each set of conveyor plates 3 has a generally arcuate shape in a cross-section perpendicular to the first direction DR1. Alternatively, the front end portion 3f of each set of conveyor plates 3 may have a generally V-shape, a generally U-shape, or other shapes in a cross-section perpendicular to the first direction DR1. Furthermore, if the viewing direction is changed, the inverted V-shape becomes a V-shape; therefore, in this specification, the generally inverted V-shape is assumed to be contained within the generally V-shape. Similarly, if the viewing direction is changed, the inverted U-shape becomes a U-shape; therefore, in this specification, the generally inverted U-shape is assumed to be contained within the generally U-shape.

[0062] exist Figure 11 In the described example, the rear end 3e of each of the set of conveyor plates 3 has an upright setting TP protruding towards the third direction DR3. For example... Figure 13 As illustrated, the upright setting part TP scrapes off the residue D below the convex curved portion CP of the subsequent conveyor plate when each conveyor plate 3 turns. For example, the upright setting part TP of the first conveyor plate 3-1 scrapes off the residue D below the convex curved portion CP2 of the second conveyor plate 3-2 when the first conveyor plate 3-1 turns. In addition, in the first embodiment, the shape of the rear end portion 3e of each set of conveyor plates 3 is not limited to... Figure 13Examples recorded. For instance, when viewed along the first direction DR1, the shape of the rear end 3e of each of a set of conveyor plates 3 can also be a generally arc-shaped or a generally circular shape.

[0063] The following describes some examples of conveyor plates 3, but the conveyor plate 3 is not limited to the examples described below. In addition, the description takes the first conveyor plate 3-1 and the second conveyor plate 3-2 among a plurality of conveyor plates 3 as examples, but of course the same structure as the first conveyor plate 3-1 can be applied to other conveyor plates.

[0064] (First example of conveyor plate 3) exist Figure 14 and Figure 15 In the described example, the first front end portion 3f-1 of the first conveyor plate 3-1 has a convex curved portion CP1 that protrudes in a third direction DR3 and extends along a first direction DR1. When the first front end portion 3f-1 has a convex curved portion CP1, the section coefficient of the third direction DR3 becomes larger, thus suppressing the deflection of the first conveyor plate 3-1 caused by laser irradiation compared to the case where the first front end portion 3f-1 is entirely flat.

[0065] exist Figure 14 In the described example, the first conveyor plate 3-1 has a convex curved portion CP1 (more specifically, a convex curved portion CP1 protruding in the third direction DR3) and a first concave portion Q1 (more specifically, a concave curved portion QP1 recessed in the fourth direction DR4). When viewed along the first direction DR1, the convex curved portion CP1 has, for example, a generally arcuate shape. Similarly, when viewed along the first direction DR1, the concave curved portion QP1 has, for example, a generally arcuate shape.

[0066] exist Figure 14 In the described example, the boundary C1 between the convex curved portion CP1 and the first concave portion Q1 (more specifically, the concave curved portion QP1) is the boundary between the first front end portion 3f-1 and the first intermediate portion 3m-1. Figure 14 In the described example, the convex curved portion CP1 is directly connected to the first concave portion Q1 (more specifically, the concave curved portion QP1). Alternatively, as... Figure 16 As illustrated, a first flat plate portion FP1-1 may also exist between the convex curved portion CP1 and the first concave portion Q1 (more specifically, the concave curved portion QP1). Figure 16 In the recorded example, the front edge of the first flat plate portion FP1-1 is connected to the convex curved portion CP1, and the rear edge of the first flat plate portion FP1-1 is connected to the first concave portion Q1 via the buckling portion BC1.

[0067] exist Figure 14 and Figure 15In the described example, the first rear end portion 3e-1 of the first conveyor plate 3-1 has a first upright setting portion TP1 protruding in a third direction DR3. The first upright setting portion TP1 extends along the first direction DR1. When the first rear end portion 3e-1 has the first upright setting portion TP1, since the section coefficient of the third direction DR3 becomes larger, the first upright setting portion TP1 suppresses the deflection of the first conveyor plate 3-1 caused by laser irradiation. Alternatively, when viewed along the first direction DR1, the shape of the first rear end portion 3e-1 of the first conveyor plate 3-1 may also be a generally arcuate shape or a generally circular shape.

[0068] exist Figure 14 and Figure 15 In the described example, the first intermediate portion 3m-1 of the first conveyor plate 3-1 and the first rear end portion 3e-1 of the first conveyor plate 3-1 (more specifically, the first erected portion TP1) are connected by a first buckling portion BA1. The first buckling portion BA1 extends along a first direction DR1. Figure 14 In the recorded example, the first buckling portion BA1 is the boundary between the first intermediate portion 3m-1 and the first rear end portion 3e-1.

[0069] exist Figure 15 In the described example, the first front end portion 3f-1 of the first conveyor plate 3-1 has a convex conveying surface SU1 protruding in a third direction DR3. The convex conveying surface SU1 constitutes a part of the first conveying surface 3u-1 of the first conveyor plate 3-1. The convex conveying surface SU1 extends along the first direction DR1.

[0070] exist Figure 15 In the described example, when viewed along the first direction DR1, the convex conveying surface SU1 has a generally arcuate shape. Alternatively, when viewed along the first direction DR1, the convex conveying surface SU1 may have a generally V-shaped shape, a generally U-shaped shape, or other shapes. Furthermore, the convex conveying surface SU1 has a generally arcuate shape in a cross-section perpendicular to the first direction DR1. Alternatively, the convex conveying surface SU1 may have a generally V-shaped shape, a generally U-shaped shape, or other shapes in a cross-section perpendicular to the first direction DR1.

[0071] like Figure 7 As illustrated, if laser LB is irradiated onto the convex curved portion CP1 (or convex conveying surface SU1) of the first conveying plate 3-1, the first front end portion 3f-1 (or the first conveying plate 3-1) thermally flexes in the third direction DR3.

[0072] exist Figure 15In the described example, the first intermediate portion 3m-1 (more specifically, the first recess Q1) of the first conveyor plate 3-1 has a concave conveyor surface SD1 recessed in the fourth direction DR4. The concave conveyor surface SD1 constitutes a part of the first conveyor surface 3u-1 of the first conveyor plate 3-1. The concave conveyor surface SD1 extends along the first direction DR1.

[0073] exist Figure 15 In the described example, when viewed along the first direction DR1, the concave conveying surface SD1 has a generally arcuate shape. Alternatively, when viewed along the first direction DR1, the concave conveying surface SD1 may have a generally V-shape, a generally U-shape, or other shapes. Furthermore, the concave conveying surface SD1 has a generally arcuate shape in a cross-section perpendicular to the first direction DR1. Alternatively, the concave conveying surface SD1 may have a generally V-shape, a generally U-shape, or other shapes in a cross-section perpendicular to the first direction DR1.

[0074] like Figure 6 As illustrated, if laser LB is irradiated onto the first recess Q1 (or concave conveying surface SD1) of the first conveying plate 3-1, the first intermediate portion 3m-1 (or the first conveying plate 3-1) thermally flexes in the fourth direction DR4.

[0075] The direction of thermal deflection of the first front end portion 3f-1 by irradiating the convex curved portion CP1 (or convex conveying surface SU1) of the first conveyor plate 3-1 with laser LB is opposite to the direction of thermal deflection of the first middle portion 3m-1 by irradiating the first concave portion Q1 (or concave conveying surface SD1) with laser LB. In the first conveyor plate 3-1, the overall deformation of the first conveyor plate 3-1 is suppressed by relatively canceling out the thermal deformation of the first front end portion 3f-1 and the thermal deformation of the first middle portion 3m-1.

[0076] exist Figure 14 In the described example, when viewed from above (in other words, when viewed along the fourth direction DR4), the first recess Q1 as a whole (or the concave conveying surface SD1 as a whole) is positioned between the rear end 3e-N of the other conveying plate 3-N, which is adjacent to the first conveying plate 3-1, and the first rear end 3e-1 of the first conveying plate 3-1. For example... Figure 14 As illustrated, when viewed from above (in other words, when viewed along the fourth direction DR4), the entire first recess Q1 (or the entire concave conveying surface SD1) can also be configured between the rear end edge E1 of the other conveying plate 3-N configured adjacent to the first conveying plate 3-1 and the front top edge E2 of the second conveying plate 3-2.

[0077] exist Figure 14In the recorded example, when viewed along the first direction DR1, the first front end portion 3f-1 of the first conveyor plate 3-1 and the first recess Q1 of the first conveyor plate 3-1 form a generally S-shaped structure.

[0078] The direction of thermal deflection of the S-shaped portion by irradiating a portion of the S-shaped portion with laser LB is opposite to the direction of thermal deflection of the S-shaped portion by irradiating another portion of the S-shaped portion. By relatively offsetting the thermal deformation of a portion of the S-shaped portion and the thermal deformation of the other portion of the S-shaped portion, the overall deformation of the first conveyor plate 3-1 is suppressed.

[0079] exist Figure 14 In the described example, the first intermediate portion 3m-1 of the first conveyor plate 3-1 has a first recess Q1. Furthermore, this first intermediate portion 3m-1 has a flat plate portion FP1 separate from the first recess Q1. For example... Figure 15 As illustrated, the flat plate portion FP1 extends along the first direction DR1.

[0080] When the first intermediate portion 3m-1 has a first recess Q1 in addition to the flat plate portion FP1, the area of ​​the flat plate portion FP1 can be reduced compared to when the entire first intermediate portion 3m-1 is flat. Therefore, the thermal deformation caused by irradiating the flat plate portion FP1 with laser LB can be relatively reduced.

[0081] exist Figure 14 and Figure 15 In the described example, the first recess Q1 is connected to the flat plate FP1 by means of a buckling portion BB1. The buckling portion BB1 extends along the first direction DR1. When the buckling portion BB1 is disposed between the first recess Q1 and the flat plate FP1, the buckling portion BB1 suppresses the deflection of the first transport plate 3-1 caused by laser irradiation.

[0082] exist Figure 14 In the described example, the front top edge E2 of the second conveyor plate 3-2 is positioned opposite to the flat plate portion FP1. Figure 14 In the described example, since a labyrinthine channel is formed, which includes the gap between the front top edge E2 of the second conveyor plate 3-2 and the flat plate portion FP1 of the first conveyor plate 3-1, and the gap between the second front end portion 3f-2 of the second conveyor plate 3-2 and the first rear end portion 3e-1 of the first conveyor plate 3-1, it is possible to suppress the slag from falling off the first conveyor plate 3-1 and the second conveyor plate 3-2.

[0083] exist Figure 15 In the described example, the second front end portion 3f-2 of the second conveyor plate 3-2 has a convex curved portion CP2 that protrudes toward the third direction DR3 and extends along the first direction DR1.

[0084] exist Figure 15 In the described example, in addition to the convex curved portion CP2, the second conveyor plate 3-2 also has a second recess Q2 that is recessed in the fourth direction DR4. More specifically, the second front end portion 3f-2 of the second conveyor plate 3-2 has a convex curved portion CP2 that protrudes in the third direction DR3 and extends along the first direction DR1, and the second middle portion 3m-2 of the second conveyor plate 3-2 has a second recess Q2 (more specifically, a concave curved portion QP2) that is recessed in the fourth direction DR4 and extends along the first direction DR1.

[0085] exist Figure 15 In the example described, the second rear end 3e-2 of the second conveyor plate 3-2 has a second upright setting portion TP2 that protrudes toward the third direction DR3 and extends along the first direction DR1.

[0086] exist Figure 15 In the recorded example, the second intermediate portion 3m-2 of the second conveyor plate 3-2 is connected to the second rear end portion 3e-2 of the second conveyor plate 3-2 by means of a second buckling portion BA2 extending along the first direction DR1.

[0087] exist Figure 15 In the described example, the second front end portion 3f-2 of the second conveyor plate 3-2 has a convex conveying surface SU2 that protrudes toward a third direction DR3 and extends along a first direction DR1. The convex conveying surface SU2 constitutes a part of the second conveying surface 3u-2 of the second conveyor plate 3-2.

[0088] exist Figure 15 In the described example, the second intermediate portion 3m-2 (more specifically, the second recess Q2) of the second conveyor plate 3-2 has a concave conveying surface SD2 that is recessed in the fourth direction DR4 and extends along the first direction DR1. The concave conveying surface SD2 constitutes a part of the second conveying surface 3u-2 of the second conveyor plate 3-2.

[0089] like Figure 14 As illustrated, when viewed from above (in other words, when viewed along the fourth direction DR4), the second recess Q2 as a whole (or the concave conveying surface SD2 as a whole) can also be configured between the rear end edge E3 of the first conveying plate 3-1 and the front top edge E4 of the third conveying plate 3-3.

[0090] exist Figure 14 In the recorded example, when viewed along the first direction DR1, the second front end portion 3f-2 of the second conveyor plate 3-2 and the second recess Q2 of the second conveyor plate 3-2 form a generally S-shaped structure.

[0091] exist Figure 14In the described example, the second intermediate portion 3m-2 of the second conveyor plate 3-2 has a flat plate portion FP2 independent of the second recess Q2. The flat plate portion FP2 extends along the first direction DR1. Figure 15 In the recorded example, the second recess Q2 is connected to the flat plate FP2 by means of a buckled portion BB2 extending along the first direction DR1.

[0092] (Second example of conveyor plate 3) exist Figure 17 and Figure 18 In the recorded example, the shape of the recess in the middle portion of each of the conveyor plates 3 is similar to... Figure 14 and Figure 15 The examples described differ. In the second example of conveyor plate 3, the shapes of the front and rear ends of each set of conveyor plates 3 are the same as those of the front and rear ends of each set of conveyor plates 3 in the first example of conveyor plate 3. Therefore, repeated descriptions of the shapes of the front and rear ends of each set of conveyor plates 3 are omitted.

[0093] exist Figure 17 In the described example, the first intermediate portion 3m-1 of the first conveyor plate 3-1 has a first recess Q1. The first recess Q1 is recessed in the fourth direction DR4 and extends along the first direction DR1.

[0094] exist Figure 14 In the recorded example, in a cross-section perpendicular to the first direction DR1, the first recess Q1 has a generally arc-shaped form. Regarding this, in... Figure 17 In the described example, in a cross-section perpendicular to the first direction DR1, the first recess Q1 has a generally V-shaped form. Furthermore, when viewed along the direction of the first direction DR1, the first recess Q1 has a generally V-shaped form.

[0095] exist Figure 18 In the described example, the first intermediate portion 3m-1 (more specifically, the first recess Q1) of the first conveyor plate 3-1 has a concave conveying surface SD1 recessed in the fourth direction DR4. The concave conveying surface SD1 extends along the first direction DR1. The concave conveying surface SD1 constitutes a part of the first conveying surface 3u-1 of the first conveyor plate 3-1. Figure 18 In the described example, when viewed along the first direction DR1, the concave conveying surface SD1 has an approximately V-shaped arc. Furthermore, the concave conveying surface SD1 has an approximately V-shaped cross-section perpendicular to the first direction DR1.

[0096] exist Figure 18In the described example, the first intermediate portion 3m-1 of the first conveyor plate 3-1 has a flat plate portion FP1 independent of the first recess Q1. The flat plate portion FP1 extends along the first direction DR1. The first intermediate portion 3m-1 may also have a first flat plate portion FP1-1 and a second flat plate portion FP1-2.

[0097] exist Figure 18 In the described example, the flat plate portion FP1 (more specifically, the first flat plate portion FP1-1) is connected to the front edge of the first recess Q1 by means of a buckled portion BC1. Furthermore, in Figure 18 In the recorded example, the rear edge of the first recess Q1 is connected to the flat plate FP1 (more specifically, the second flat plate FP1-2) by means of the buckling portion BB1.

[0098] exist Figure 18 In the described example, the second front end portion 3f-2 of the second conveyor plate 3-2 has a convex bend CP2 (more specifically, a convex bend CP2 protruding in the third direction DR3). Furthermore, the second middle portion 3m-2 of the second conveyor plate 3-2 has a second recess Q2. The second recess Q2 is recessed in the fourth direction DR4 and extends along the first direction DR1.

[0099] The shape of the second recess Q2 is the same as that of the first recess Q1, so the repeated description of the shape of the second recess Q2 is omitted.

[0100] (The third example of conveyor plate 3) exist Figure 19 and Figure 20 In the recorded example, the shape of the recess in the middle portion of each of the conveyor plates 3 is similar to... Figure 14 and Figure 15 The examples described differ. In the third example of conveyor plate 3, the shapes of the front and rear ends of each set of conveyor plates 3 are the same as those of the front and rear ends of each set of conveyor plates 3 in the first example of conveyor plate 3. Therefore, repeated descriptions of the shapes of the front and rear ends of each set of conveyor plates 3 are omitted.

[0101] exist Figure 19 In the described example, the first intermediate portion 3m-1 of the first conveyor plate 3-1 has a first recess Q1. The first recess Q1 is recessed in the fourth direction DR4 and extends along the first direction DR1.

[0102] exist Figure 19 In the described example, in a cross-section perpendicular to the first direction DR1, the first recess Q1 has a generally U-shaped form. Furthermore, when viewed along the direction of the first direction DR1, the first recess Q1 has a generally U-shaped form.

[0103] exist Figure 20In the described example, the first intermediate portion 3m-1 (more specifically, the first recess Q1) of the first conveyor plate 3-1 has a concave conveying surface SD1 recessed in the fourth direction DR4. The concave conveying surface SD1 extends along the first direction DR1. The concave conveying surface SD1 constitutes a part of the first conveying surface 3u-1 of the first conveyor plate 3-1. Figure 20 In the described example, when viewed along the first direction DR1, the concave conveying surface SD1 has a generally U-shaped arc. Furthermore, the concave conveying surface SD1 has a generally U-shaped cross-section perpendicular to the first direction DR1.

[0104] exist Figure 20 In the described example, the first intermediate portion 3m-1 of the first conveyor plate 3-1 has a flat plate portion FP1 independent of the first recess Q1. The flat plate portion FP1 extends along the first direction DR1. The first intermediate portion 3m-1 may also have a first flat plate portion FP1-1 and a second flat plate portion FP1-2.

[0105] exist Figure 20 In the described example, the flat plate portion FP1 (more specifically, the first flat plate portion FP1-1) is connected to the front edge of the first recess Q1 by means of a buckled portion BC1. Furthermore, in Figure 20 In the recorded example, the rear edge of the first recess Q1 is connected to the flat plate FP1 (more specifically, the second flat plate FP1-2) by means of the buckling portion BB1.

[0106] exist Figure 20 In the described example, the second front end portion 3f-2 of the second conveyor plate 3-2 has a convex bend CP2 (more specifically, a convex bend CP2 protruding in a third direction DR3). The convex bend CP2 extends along the first direction DR1. Furthermore, the second middle portion 3m-2 of the second conveyor plate 3-2 has a second recess Q2. The second recess Q2 is recessed in a fourth direction DR4 and extends along the first direction DR1.

[0107] The shape of the second recess Q2 is the same as that of the first recess Q1, so the repeated description of the shape of the second recess Q2 is omitted.

[0108] (Fourth example of conveyor plate 3) exist Figure 14 , Figure 16 , Figure 17 , Figure 19 In the recorded example, the first intermediate portion 3m-1 of the first conveyor plate 3-1 has one first recess Q1. Alternatively, as... Figure 21 As illustrated, the first intermediate portion 3m-1 can also have more than two first recesses Q1. Figure 21In the described example, the first intermediate portion 3m-1 has a first recess Q1-1 and other first recesses Q1-2 disposed on the second direction DR2 side of the first recess Q1. The first recess Q1-1 is recessed in the fourth direction DR4 and extends along the first direction DR1. In addition, the other first recesses Q1-2 are recessed in the fourth direction DR4 and extend along the first direction DR1.

[0109] exist Figure 21 In the described example, each first recess Q1 has a generally arcuate shape when viewed along the first direction DR1. Alternatively, each first recess Q1 may also have a generally V-shaped or generally U-shaped shape when viewed along the first direction DR1.

[0110] In any of the first, second, third, or fifth examples of the conveyor plate 3 described above, the first intermediate portion 3m-1 of the first conveyor plate 3-1 may also have other first recesses Q1-2 in addition to the first recess Q1-1.

[0111] (The fifth example of conveyor plate 3) exist Figure 22 In the described example, at least a portion of the first conveying surface 3u-1 of the first conveying plate 3-1 is formed by the surface of the laser reflective layer 4-1. Figure 22 In the described example, the first conveyor plate 3-1 has a first base member 35-1 and a laser reflective layer 4-1 covering at least a portion of the first base member 35-1. The laser reflective layer 4-1 is made of a material with high laser reflectivity (e.g., copper). The first base member 35-1 is made of steel, for example, more specifically, of hot-rolled mild steel sheet, cold-rolled steel sheet, or cold-rolled stainless steel sheet.

[0112] The laser reflectivity of the laser reflective layer 4-1 is higher than that of the first base member 35-1 of the first conveying plate 3-1. Furthermore, in the first embodiment (or the second embodiment described later), the wavelength of the laser LB emitted from the laser irradiation device 60 is, for example, 1060 nm or more and 1080 nm or less. The laser reflectivity of the laser reflective layer 4-1 for lasers with wavelengths of 1060 nm or more and 1080 nm or less is, for example, 70% or more, 80% or more, or 90% or more.

[0113] exist Figure 22In the described example, a portion of the first conveying surface 3u-1 of the first conveying plate 3-1 (e.g., the conveying surface of the flat plate portion FP1) is formed by the surface of the laser reflective layer 4-1. Furthermore, another portion of the first conveying surface 3u-1 of the first conveying plate 3-1 (e.g., the convex conveying surface SU1 and / or the concave conveying surface SD1) is formed by a surface with a lower laser reflectivity compared to the laser reflectivity of the laser reflective layer 4-1 (e.g., the surface 35u of the first base member 35-1).

[0114] Alternatively, such as Figure 23 As illustrated, the first conveying surface 3u-1 of the first conveying plate 3-1 can also be entirely composed of the surface of the laser reflective layer 4-1. Additionally, in Figure 23 In order to make it easier to control the laser reflective layers (4-1, 4-2), shadows formed by dots are added to the laser reflective layers (4-1, 4-2).

[0115] exist Figure 22 In the described example, the laser reflective layer 4-1 (e.g., a copper layer constituting at least a portion of the first conveying surface 3u-1) effectively reflects the laser LB emitted from the laser irradiation device 60. This suppresses heat input to the first conveying plate 3-1, thereby suppressing thermal deformation and deflection of the first conveying plate 3-1.

[0116] exist Figure 22 In the described example, at least a portion of the second conveying surface 3u-2 of the second conveying plate 3-2 is formed by the surface of the laser reflective layer 4-2. Figure 22 In the described example, the second conveyor plate 3-2 has a second base member 35-2 and a laser reflective layer 4-2 covering at least a portion of the second base member 35-2. The laser reflective layer 4-2 is made of a material with high laser reflectivity (e.g., copper). The second base member 35-2 is made of steel, for example, more specifically, of hot-rolled mild steel sheet, cold-rolled steel sheet, or cold-rolled stainless steel sheet.

[0117] In any one of the first, second, third and fourth examples of the conveyor plate 3, at least a portion of the conveyor surface 3u of each conveyor plate 3 may be formed by the surface of the laser reflective layer 4.

[0118] (Dimensions of the first recess Q1) Preferably, relative to the length of the second direction DR2 of the first recess Q1, the length of the first recess Q1 in the second direction DR2 is set such that when the first conveyor plate 3-1 moves in the second direction DR2 in a manner that traverses the laser LB emitted from the laser irradiation device 60, the deflection caused by irradiating the first front end 3f-1 with the laser irradiating the first middle portion 3m-1 substantially cancels each other out.

[0119] like Figure 24 As illustrated, when viewed from above (in other words, when viewed along the fourth direction DR4), the dimension of the first recess Q1 of the first conveyor plate 3-1 (in other words, the length of the first recess Q1 in the second direction DR2) is, for example, more than 1 / 3 and less than 3 times, or more than 1 / 2 and less than 2 times, the dimension of the convex curved portion CP1 of the first conveyor plate 3-1 (in other words, the length of the convex curved portion CP1 in the second direction DR2). Furthermore, when viewed from above (in other words, when viewed along the fourth direction DR4), the dimension of the concave conveying surface SD1 of the first conveyor plate 3-1 (in other words, the length of the concave conveying surface SD1 in the second direction DR2) is, for example, more than 1 / 3 and less than 3 times, or more than 1 / 2 and less than 2 times, the dimension of the convex conveying surface SU1 of the first conveyor plate 3-1 (in other words, the length of the convex conveying surface SU1 in the second direction DR2). Additionally, in Figure 24 In order to facilitate the observation of the concave conveying surface SD1, a shading formed by oblique lines is added to the concave conveying surface SD1. In addition, in order to facilitate the observation of the convex conveying surface SU1, a shading formed by dots is added to the convex conveying surface SU1.

[0120] exist Figure 25 In the described example, the depth L2 of the concave conveying surface SD1 (more specifically, the distance in the direction along the third direction DR3 between the point E5 on the third-direction DR3 side of the concave conveying surface SD1 and the deepest part E6 of the concave conveying surface SD1) is greater than the plate thickness T1 of the first recess Q1. This depth L2 of the concave conveying surface SD1 is, for example, 2 mm or more, 4 mm or more, or 6 mm or more.

[0121] exist Figure 25 In the described example, the slag-hanging conveyor 2A has another conveyor plate 3-N arranged adjacent to the first front end portion 3f-1 of the first conveyor plate 3-1. The first conveyor plate 3-1 can tilt relative to the other conveyor plate 3-N about a first axis (hereinafter referred to as the "forward tilting movement axis AX1"). Furthermore, the first conveyor plate 3-1 can tilt relative to the second conveyor plate 3-2 about a second axis (hereinafter referred to as the "rear tilting movement axis AX2").

[0122] like Figure 25 As illustrated, the plane containing both the forward tilting axis AX1 and the rear tilting axis AX2 of the first conveyor plate 3-1 is defined as the first plane PL1. Figure 25 In the recorded example, the deepest part E6 of the concave conveying surface SD1 is located on the fourth direction DR4 side, which is greater than the first plane PL1.

[0123] The distance L3 between the deepest part E6 of the concave conveying surface SD1 and the first plane PL1 is, for example, 2 mm or more, 4 mm or more, or 6 mm or more.

[0124] exist Figure 25 In the example described, the end E7 of the first recess Q1 on the fourth direction DR4 side is located on the fourth direction DR4 side in the whole of the first conveyor plate 3-1.

[0125] (The ramp around track OB) like Figure 26 As illustrated, the surrounding track OB of a set of conveyor plates 3 may also include a ramp CL that increases in height as it moves from the processing area RG1 toward the discharge area RG2. When the surrounding track OB includes the ramp CL, it is easy to configure in the discharge area RG2 a container 13 for receiving slag D from the slag conveyor 2A, or a second conveyor 15 for receiving slag D from the slag conveyor 2A (see, if necessary). Figure 32 ).

[0126] (Laser processing device 1A) like Figure 1 As illustrated, the laser processing apparatus 1A includes a slag conveyor 2A, a laser irradiation device 60, a moving device 7, and a control device 8. Alternatively, the laser processing apparatus 1A may also include a workpiece support member 90.

[0127] The description of the slag-hanging conveyor 2A has already been provided, so a repeat description of the slag-hanging conveyor 2A will be omitted.

[0128] like Figure 27 As illustrated, the laser irradiation device 60 has a laser head 61 with an emission outlet OP for emitting laser light. The laser irradiation device 60 may also include a laser source 63 and an optical component 65 (e.g., an optical fiber) for transmitting laser light from the laser source 63 to the laser head 61.

[0129] The moving device 7 moves the laser head 61 relative to the workpiece support member 90. Furthermore, the moving device 7 moves the laser head 61 relative to the workpiece W supported on the workpiece support member 90. The workpiece W supported on the workpiece support member 90 is, for example, a sheet metal.

[0130] exist Figure 27 In the example described, the moving device 7 has a moving body (71a, 73a) that supports the laser head 61 and a driving device (71b, 73b) that moves the moving body (71a, 73a).

[0131] exist Figure 27In the described example, the mobile device 7 has a first mobile device 71. The first mobile device 71 has a first moving body 71a that supports the laser head 61 and a first driving device 71b (e.g., a first motor) that moves the first moving body 71a.

[0132] exist Figure 27 In the described example, the first moving body 71a functions as a Z-axis saddle, and the first drive unit 71b functions as a Z-axis drive unit. The first drive unit 71b moves the first moving body 71a in a direction parallel to the vertical direction (in other words, the Z-axis direction). More specifically, the first drive unit 71b can move the first moving body 71a downwards to bring it closer to the workpiece support member 90. Furthermore, the first drive unit 71b can move the first moving body 71a upwards to move it away from the workpiece support member 90.

[0133] exist Figure 27 In the described example, the moving device 7 has a second moving device 73. The second moving device 73 has a second moving body 73a and a second drive device 73b (e.g., a second motor) for moving the second moving body 73a. The second moving body 73a supports the first moving body 71a so that it can move in a direction parallel to the vertical direction.

[0134] exist Figure 27 In the described example, the second moving body 73a functions as a Y-axis saddle, and the second drive device 73b functions as a Y-axis drive unit. The second drive device 73b moves the second moving body 73a in a direction parallel to the horizontal plane (more specifically, the Y-axis direction).

[0135] exist Figure 28 In the described example, the moving device 7 has a third moving device 75. The third moving device 75 has a third moving body 75a and a third drive device 75b (e.g., a third motor) for moving the third moving body 75a. The third moving body 75a supports the second moving body 73a so that it can move in a direction parallel to the Y-axis.

[0136] exist Figure 28 In the described example, the third moving body 75a functions as an X-axis saddle, and the third drive unit 75b functions as an X-axis drive unit. The third drive unit 75b moves the third moving body 75a along a direction parallel to the horizontal plane (more specifically, the X-axis direction perpendicular to the Z and Y axes).

[0137] like Figure 27 As illustrated, the third moving body 75a can also be constructed from a portal frame. Figure 28In the described example, the third moving body 75a can move across the machining area RG1 when viewed from above. The third moving body 75a is supported by the base 70 and can move in a direction parallel to the X-axis.

[0138] exist Figure 29 In the described example, the workpiece support member 90 includes a pin header that supports the workpiece as a sheet metal. The pin header has multiple tops 92 that support the workpiece W as a sheet metal.

[0139] exist Figure 29 In the described example, the workpiece support member 90 has a configuration relative to the horizontal plane (e.g., Figure 29 Multiple plate members 91 are arranged in an upright position (XY plane). In addition, each of the multiple plate members 91 has a serrated edge portion EG.

[0140] The workpiece support member 90 may have ten or more plate members 91 arranged in an upright position relative to the horizontal plane, or it may have twenty or more plate members 91 arranged in an upright position relative to the horizontal plane. Each plate member 91 may be made of metal, for example.

[0141] exist Figure 29 In the described example, the workpiece support member 90 is a transferable pallet PT. The pallet PT has multiple plate members 91 and a frame 93 on which the multiple plate members 91 are mounted. The bottom of the frame 93 is defined by a bottom opening. The slag D generated by irradiating the workpiece W with laser LB falls toward the slag conveyor 2A through the space between two adjacent plate members 91 and the bottom opening defined by the frame 93.

[0142] like Figure 30 As illustrated, the laser processing apparatus 1A may also include a transfer device 11 for transferring the workpiece support member 90. The transfer device 11 transfers the workpiece support member 90 from the processing area RG1 to the removal area RG3. Thereafter, the processed workpiece Wb (more specifically, the processed sheet metal) is removed from the workpiece support member 90 located in the removal area RG3. Figure 31 As illustrated, the removal can be performed using a suction cup 121 capable of adsorbing the processed workpiece Wb, or it can be performed using a fork capable of lifting the processed workpiece Wb. Alternatively, the removal can be performed by a robot or a human operator.

[0143] exist Figure 31In the described example, the laser processing apparatus 1A has a workpiece transfer device 12 (e.g., a robotic arm) for transferring the workpiece before processing and the processed workpiece Wb. The workpiece transfer device 12 may also be a sheet metal transfer device 12a for transferring workpieces as sheet metal. The sheet metal transfer device 12a may also have multiple suction cups 121 for adsorbing workpieces as sheet metal or forks for supporting workpieces as sheet metal from below.

[0144] exist Figure 1 In the described example, the laser processing apparatus 1A has a container 13 that receives slag D from the slag conveyor 2A. The container 13 is positioned directly below the slag conveyor 2A in the discharge area RG2.

[0145] The laser processing apparatus 1A may also have a second conveyor 15 that receives the slag D from the slag conveyor 2A. Figure 32 In the recorded example, the slag-carrying conveying surface of the second conveyor 15 is positioned directly below the slag-carrying conveyor 2A in the discharge area RG2. Figure 32 In the example described, the second conveyor 15 conveys the slag received from the slag conveyor 2A to the container 13.

[0146] exist Figure 33 In the described example, control device 8 controls laser irradiation device 60 and moving device 7 (e.g., first drive device 71b, second drive device 73b, and third drive device 75b). Control device 8 can also control the transfer device 11 that transfers the workpiece support member 90 (see reference). Figure 30 ) and / or the workpiece transfer device 12 for transferring workpiece W (refer to Figure 31 In addition, the control device 8 can also control the drive device 29 of the slag conveyor 2A.

[0147] exist Figure 34 In the described example, the control device 8 sends an emission command R1 to the laser irradiation device 60 (e.g., laser source 63), thereby causing the laser LB to be emitted from the laser head 61. More specifically, the control device 8 sends an emission command R1 to the laser irradiation device 60 (e.g., laser source 63), and the laser irradiation device 60, receiving the emission command R1, emits the laser LB from the laser head 61 (more specifically, the emission outlet of the laser head 61).

[0148] exist Figure 34 In the described example, the control device 8 moves the laser head 61 by sending a movement command S to the moving device 7. More specifically, the control device 8 sends a movement command S to the moving device 7, and the moving device 7, receiving the movement command S, moves the laser head 61.

[0149] like Figure 34As illustrated, the control device 8 includes a hardware processor 80 (hereinafter referred to as "processor 80"), a memory 82, a communication circuit 84, and an input device 86 (e.g., a display 862 with a touch panel). The processor 80, memory 82, communication circuit 84, and input device 86 are interconnected via a bus 88. Data required for the processing of workpiece W (e.g., workpiece data 826 containing shape data and processing position data of workpiece W) can be input to the control device 8 via the input device 86, or input to the control device 8 from another computer via the communication circuit 84. Furthermore, the input device 86 is not limited to a display 862 with a touch panel. For example, the control device 8 may also include input devices 86 such as buttons, switches, joysticks, pointing devices, and keyboards, as well as a display showing the data or other information input to the input device 86.

[0150] The memory 82 stores workpiece data 826 and other data, as well as processing programs 822 and other programs. The memory 82 is a storage medium that can be read by the processor 80 of the control device 8. The memory 82 can be, for example, a non-volatile or volatile semiconductor memory such as RAM, ROM, or flash memory, or a disk, or other forms of memory.

[0151] The control device 8 generates control commands by executing the machining program 822 stored in the memory 82 through the processor 80. Furthermore, the communication circuit 84 sends these control commands to the controlled equipment (more specifically, the laser irradiation device 60, the moving device 7, the transfer device 11, the workpiece transfer device 12, and the drive device 29, etc.). Thus, by executing the machining program 822 through the processor 80, the control device 8 can control the laser irradiation device 60, the moving device 7, the transfer device 11, the workpiece transfer device 12, and the drive device 29, etc.

[0152] The control device 8 can also control the moving speed of the first set of conveyor plates 3 in conjunction with the control of at least one of the laser irradiation device 60 and the moving device 7.

[0153] For example, the control device 8 can also control the drive device 29 to move the first set of conveyor plates 3 at a first speed (a speed other than zero) when the laser irradiation device 60 stops emitting laser LB, and control the drive device 29 to move the first set of conveyor plates 3 at a second speed faster than the first speed when the laser irradiation device 60 emits laser LB.

[0154] For example, the control device 8 can also control the drive device 29 to change the moving speed of the first set of conveyor plates 3 according to the power of the laser LB emitted by the laser irradiation device 60 or the type of processing performed by the laser irradiation device 60 (e.g., hole drilling or cutting).

[0155] (Cooling device 95) like Figure 35 As illustrated, the laser processing apparatus 1A may also have a cooling device 95 for forced cooling of a set of conveyor plates 3.

[0156] For example, the laser processing apparatus 1A may also include an air-cooled cooling device 95a that blows air onto a set of conveyor plates 3. Figure 35 In the described example, the cooling device 95a has an air jet device 96 that blows air onto the back surface 3n of each of the set of conveyor plates 3. Alternatively or additionally, the cooling device 95a may also have an air jet device that blows air onto the conveying surface 3u of each of the set of conveyor plates 3.

[0157] Alternatively or additionally, the laser processing apparatus 1A may also include a liquid-cooled cooling device 95b that utilizes liquid cooling to cool a set of conveyor plates 3. Figure 35 In the described example, the cooling device 95b has a liquid tank 97 (e.g., a water tank) arranged in a circular track traversing a set of conveyor plates 3. The set of conveyor plates 3 are cooled by the liquid (e.g., water) in the liquid tank 97. Furthermore, the temperature rise of the conveyor plates 3 is suppressed by the vaporization (heat of vaporization) of the liquid adhering to the surface of the set of conveyor plates 3 due to laser irradiation.

[0158] (Second Implementation) Reference Figures 36 to 42 The slag conveyor 2B and the laser processing device 1B in the second embodiment will be described. Figure 36 This is a schematic cross-sectional view of the laser processing apparatus 1B in the second embodiment. Figure 37 This is a schematic cross-sectional view showing a portion of the laser processing apparatus 1B in the second embodiment. Figure 38 It is an exploded perspective view schematically representing a portion of a set of conveyor plates 3. Figure 39 It is a schematic perspective view showing a set of conveyor plates 3, including a first conveyor plate 3-1 and a second conveyor plate 3-2, that can move along the surrounding track OB. Figure 40 This is a schematic cross-sectional view showing a portion of the laser processing apparatus 1B in the second embodiment. Figure 41 It is an exploded perspective view schematically representing a portion of a set of conveyor plates 3. Figure 42 It is a schematic cross-sectional view showing a portion of a set of conveyor plates 3.

[0159] In the second embodiment of the slag-hanging conveyor 2B, the aspect in which a group of conveyor plates 3 are respectively hinged to other conveyor plates differs from that of the slag-hanging conveyor 2A in the first embodiment.

[0160] In the second embodiment, the description focuses on the differences from the first embodiment. Furthermore, in the second embodiment, repetitive explanations of matters already described in the first embodiment are omitted. Therefore, in the second embodiment, even without explicit explanation, matters already described in the first embodiment can certainly be applied to the second embodiment. Conversely, all matters described in the second embodiment can be applied to the first embodiment.

[0161] exist Figure 36 and Figure 37 In the described example, the slag conveyor 2B in the second embodiment includes a set of conveyor plates 3 for conveying slag generated by irradiating a workpiece with a laser. The set of conveyor plates 3 includes a first conveyor plate 3-1 extending along a first direction DR1, and a second conveyor plate 3-2 disposed adjacent to the first conveyor plate 3-1 and extending along the first direction DR1. Figure 38 As illustrated, the first conveyor plate 3-1 includes a first front end portion 3f-1, a first rear end portion 3e-1, and a first intermediate portion 3m-1 connecting the first front end portion 3f-1 and the first rear end portion 3e-1. The first intermediate portion 3m-1 has a first recess Q1 extending along a first direction DR1.

[0162] exist Figure 36 In the example described, the laser processing apparatus 1B in the second embodiment includes the aforementioned slag conveyor 2B, a laser irradiation device 60 including a laser head 61 that irradiates the workpiece W with laser light, a moving device 7 that moves the laser head 61 relative to the workpiece support member 90 that supports the workpiece W, and a control device 8 that controls the laser irradiation device 60 and the moving device 7.

[0163] Therefore, the slag conveyor 2B and laser processing device 1B in the second embodiment achieve the same effect as the slag conveyor 2A and laser processing device 1A in the first embodiment.

[0164] like Figure 38 As illustrated, the first rear end 3e-1 of the first conveyor plate 3-1 is hinged to the second front end 3f-2 of the second conveyor plate 3-2. Figure 38In the described example, a rod (hereinafter referred to as "second rod RD2") is arranged such that it passes through both the first rear end 3e-1 of the first conveyor plate 3-1 and the second front end 3f-2 of the second conveyor plate 3-2, thereby hinged to the first rear end 3e-1 of the first conveyor plate 3-1 and the second front end 3f-2 of the second conveyor plate 3-2. Furthermore, a rod (hereinafter referred to as "third rod RD3") is arranged such that it passes through both the second rear end 3e-2 of the second conveyor plate 3-2 and the third front end 3f-3 of the third conveyor plate 3-3, thereby hinged to the third front end 3f-3 of the third conveyor plate 3-3.

[0165] (arbitrarily added structure) Next, refer to Figures 1 to 42 Any additional structures that can be used in the slag conveyor 2B and the laser processing apparatus 1B in the second embodiment will be described.

[0166] (First recess Q1) exist Figure 37 In the described example, the first recess Q1 is a recess that is recessed in the fourth direction DR4. The first recess Q1 has a conveying surface for conveying slag and a back surface disposed on the opposite side of the conveying surface.

[0167] The conveying surface of the first recess Q1 is a concave conveying surface SD1 that is recessed in the fourth direction DR4. Figure 37 In the described example, the concave conveying surface SD1 has a generally arcuate shape in a cross-section perpendicular to the first direction DR1. Alternatively, the concave conveying surface SD1 may have a generally V-shaped shape, a generally U-shaped shape, or other shapes in a cross-section perpendicular to the first direction DR1.

[0168] The back side of the first recess Q1 is a protruding surface SN1 that protrudes in the fourth direction DR4. Figure 37 In the described example, the protruding surface SN1 has a generally arcuate shape in a cross-section perpendicular to the first direction DR1. Alternatively, the protruding surface SN1 may have a generally V-shaped shape, a generally U-shaped shape, or other shapes in a cross-section perpendicular to the first direction DR1.

[0169] (Slag Conveyor 2B) exist Figure 36 In the described example, a portion of the slag-coating conveyor 2B is positioned directly below the laser irradiation device 60. Furthermore, a set of conveyor plates 3 of the slag-coating conveyor 2B is configured to move across the processing area RG1 (more specifically, the area directly below the laser irradiation device 60).

[0170] exist Figure 36In the documented example, a set of conveyor plates 3 transports slag from processing area RG1 to discharge area RG2. Figure 36 In the described example, a set of conveyor plates 3 rotates (more specifically, rotates 180 degrees about a horizontal axis) in the discharge zone RG2. As a result, the slag D conveyed by the set of conveyor plates 3 is discharged from the set of conveyor plates 3 in the discharge zone RG2. Additionally, the cut piece CF (see reference...) is conveyed by the set of conveyor plates 3... Figure 37 In the case of ), the cut piece CF is also discharged from a set of conveyor plates 3 in the discharge area RG2.

[0171] exist Figure 39 In the described example, the slag-hanging conveyor 2B includes a first annular member 21 (more specifically, a first annular chain 21a), a second annular member 22 (more specifically, a second annular chain 22a), and a drive unit 29. The first annular member 21 and the second annular member 22 support a set of conveyor plates 3. More specifically, a set of conveyor plates 3 is mounted on the first annular member 21 and the second annular member 22.

[0172] The first annular member 21 and the second annular member 22 are driven directly or indirectly by the driving device 29. The first annular member 21, the second annular member 22 and the driving device 29 have been described in the first embodiment, so a repeated description of their structure is omitted.

[0173] (A set of conveyor plates 3) A set of conveyor plates 3 moves along the circular track OB. For example... Figure 39 As illustrated, the surrounding track OB of a set of conveyor plates 3 is parallel to the first surrounding track B1 of the first annular chain 21a and parallel to the second surrounding track B2 of the second annular chain 22a. Figure 36 In the example described, a set of conveyor plates 3 are configured to be connected in a manner that forms a ring-shaped conveyor body.

[0174] Each of the conveyor plates 3 has a length, for example, between 1m and 3m. Each of the conveyor plates 3 has a width, for example, between 40mm and 200mm. The thickness of each of the conveyor plates 3 (more specifically, the thickness of the middle 3m portion of each conveyor plate 3) is, for example, 5mm or less or 3mm or less. Each of the conveyor plates 3 is made of metal. Each of the conveyor plates 3 is, for example, made of steel, more specifically, made of hot-rolled mild steel sheet, cold-rolled steel sheet, or cold-rolled stainless steel sheet.

[0175] exist Figure 38In the described example, the first conveyor plate 3-1 has a first front end portion 3f-1, a first rear end portion 3e-1, and a first intermediate portion 3m-1 connecting the first front end portion 3f-1 and the first rear end portion 3e-1. A plurality of first front receiving portions 30f-1 (more specifically, a plurality of through holes for inserting the first rod RD1) are formed in the first front end portion 3f-1 of the first conveyor plate 3-1. Furthermore, a plurality of first rear receiving portions 30e-1 (more specifically, a plurality of through holes for inserting the second rod RD2) are formed in the first rear end portion 3e-1 of the first conveyor plate 3-1.

[0176] exist Figure 38 In the described example, the second conveyor plate 3-2 has a second front end portion 3f-2, a second rear end portion 3e-2, and a second intermediate portion 3m-2 connecting the second front end portion 3f-2 and the second rear end portion 3e-2. A plurality of second front receiving portions 30f-2 (more specifically, a plurality of through holes for inserting the second rod RD2) are formed on the second front end portion 3f-2 of the second conveyor plate 3-2. Furthermore, a plurality of second rear receiving portions 30e-2 (more specifically, a plurality of through holes for inserting the third rod RD3) are formed on the second rear end portion 3e-2 of the second conveyor plate 3-2.

[0177] (First conveyor plate 3-1) exist Figure 37 In the described example, the first front end portion 3f-1 of the first conveyor plate 3-1 has a convex conveying surface SU1 protruding in a third direction DR3. The convex conveying surface SU1 constitutes a part of the first conveying surface 3u-1 of the first conveyor plate 3-1. Figure 37 In the described example, the convex conveying surface SU1 is the upper surface of the first front receiving portion 30f-1. The convex conveying surface SU1 extends along the first direction DR1. Figure 37 In the described example, when viewed along the first direction DR1, the convex conveying surface SU1 has a generally arcuate shape. Furthermore, the convex conveying surface SU1 also has a generally arcuate shape in a cross-section perpendicular to the first direction DR1.

[0178] If laser LB is irradiated onto the convex conveying surface SU1 of the first conveying plate 3-1, the first front end 3f-1 (or the first conveying plate 3-1) will thermally flex in the third direction DR3.

[0179] exist Figure 37 In the described example, the first intermediate portion 3m-1 (more specifically, the first recess Q1) of the first conveyor plate 3-1 has a concave conveyor surface SD1 recessed in the fourth direction DR4. The concave conveyor surface SD1 extends along the first direction DR1.

[0180] If laser LB is irradiated onto the concave conveying surface SD1 of the first conveying plate 3-1, the first intermediate portion 3m-1 (or the first conveying plate 3-1) will thermally flex in the fourth direction DR4.

[0181] The direction of thermal deflection of the first front end 3f-1 by irradiating the convex conveying surface SU1 of the first conveying plate 3-1 with laser LB is opposite to the direction of thermal deflection of the first middle part 3m-1 by irradiating the first concave part Q1 (or the concave conveying surface SD1) with laser LB, thus suppressing the overall thermal deformation of the first conveying plate 3-1.

[0182] exist Figure 37 and Figure 38 In the described example, in a cross-section perpendicular to the first direction DR1, the first recess Q1, the concave conveying surface SD1, and the protruding surface SN1 each have a generally arcuate shape. Furthermore, when viewed along the first direction DR1, the first recess Q1, the concave conveying surface SD1, and the protruding surface SN1 each have a generally arcuate shape.

[0183] Alternatively, such as Figure 40 and Figure 41 As illustrated, in a cross-section perpendicular to the first direction DR1, the first recess Q1, the concave conveying surface SD1, and the protruding surface SN1 may each have a generally U-shaped form. Furthermore, when viewed along the first direction DR1, the first recess Q1, the concave conveying surface SD1, and the protruding surface SN1 may each have a generally U-shaped form. Alternatively, when viewed along the first direction DR1, the first recess Q1, the concave conveying surface SD1, and the protruding surface SN1 may each have a generally V-shaped form.

[0184] exist Figure 40 In the described example, the first intermediate portion 3m-1 of the first conveyor plate 3-1 has a first recess Q1. Furthermore, this first intermediate portion 3m-1 has a flat plate portion FP1 separate from the first recess Q1. Moreover, the first recess Q1 and the flat plate portion FP1 are connected by a buckling portion BC1. Figure 41 As illustrated, the first recess Q1, the flat plate FP1, and the buckling portion BC1 extend along the first direction DR1, respectively.

[0185] like Figure 41 As illustrated, the first intermediate portion 3m-1 may also have a first flat plate portion FP1-1, a second flat plate portion FP1-2, and a first recess Q1 disposed between the first flat plate portion FP1-1 and the second flat plate portion FP1-2. Figure 41 In the example described, the first plate portion FP1-1 is connected to the first front end portion 3f-1, and the second plate portion FP1-2 is connected to the first rear end portion 3e-1.

[0186] exist Figure 41 In the recorded example, the second conveyor plate 3-2 and the third conveyor plate 3-3 have the same shape as the first conveyor plate 3-1.

[0187] (Dimensions of the first recess Q1) exist Figure 42 In the described example, the depth L2 of the concave conveying surface SD1 (more specifically, the distance in the direction along the third direction DR3 between the point E5 on the third-direction DR3 side of the concave conveying surface SD1 and the deepest part E6 of the concave conveying surface SD1) is greater than the plate thickness T1 of the first recess Q1. This depth L2 of the concave conveying surface SD1 is, for example, 2 mm or more, 4 mm or more, or 6 mm or more.

[0188] exist Figure 42 In the described example, the slag-hanging conveyor 2B has another conveyor plate 3-N arranged adjacent to the first front end portion 3f-1 of the first conveyor plate 3-1. The first conveyor plate 3-1 can tilt relative to the other conveyor plate 3-N about a forward tilting axis AX1. Furthermore, the first conveyor plate 3-1 can tilt relative to the second conveyor plate 3-2 about a rearward tilting axis AX2.

[0189] like Figure 42 As illustrated, the plane containing both the forward tilting axis AX1 and the rear tilting axis AX2 of the first conveyor plate 3-1 is defined as the first plane PL1. Figure 25 In the recorded example, the deepest part E6 of the concave conveying surface SD1 is located on the fourth direction DR4 side, which is greater than the first plane PL1.

[0190] The distance L3 between the deepest part E6 of the concave conveying surface SD1 and the first plane PL1 is, for example, 2 mm or more, 4 mm or more, or 6 mm or more.

[0191] exist Figure 42 In the example described, the end E7 of the first recess Q1 on the fourth direction DR4 side is located on the fourth direction DR4 side in the whole of the first conveyor plate 3-1.

[0192] (Laser processing device 1B) like Figure 36 As illustrated, the laser processing apparatus 1B includes a slag conveyor 2B, a laser irradiation device 60, a moving device 7, and a control device 8. Alternatively, the laser processing apparatus 1B may also include a workpiece support member 90. The laser irradiation device 60, the moving device 7, the control device 8, and the workpiece support member 90 have already been described in the first embodiment, therefore a repeated description of their structures is omitted.

[0193] (Third Implementation) Reference Figures 1 to 43 The workpiece processing method in the third embodiment will be described. Figure 43 This is a flowchart illustrating an example of the workpiece processing method in the third embodiment.

[0194] The workpiece processing method in the third embodiment can be executed using the laser processing device 1A in the first embodiment, the laser processing device 1B in the second embodiment, or other laser processing devices.

[0195] In the first step ST1, the workpiece W is processed. The first step ST1 is the workpiece processing step. In this step, the workpiece W is processed by irradiating it with laser LB. More specifically, the workpiece W is processed by irradiating it with laser LB from the laser head 61 of the laser irradiation device 60. The wavelength of the laser LB emitted from the laser head 61 of the laser irradiation device 60 is, for example, 1060 nm or more and 1080 nm or less.

[0196] The workpiece W processed in the workpiece processing step (first step ST1) is, for example, a sheet metal. The workpiece processing step may also include laser cutting of the workpiece W by moving the laser head 61 that emits the laser LB. Furthermore, the workpiece processing step may also include laser perforation of the workpiece W by emitting the laser LB from the temporarily stationary laser head 61. By processing the workpiece W with the laser LB, a product (e.g., a sheet metal product) is formed from the workpiece W.

[0197] In the workpiece processing step (first step ST1), a slag D is generated from the workpiece W by irradiating it with a laser LB. Alternatively, a cutting disc CF can also be generated from the workpiece W by irradiating it with a laser LB. The generated slag D and / or cutting disc CF fall downwards in the processing area RG1. The slag D and / or cutting disc CF falling downwards are received by the slag conveyor 2.

[0198] In the workpiece processing step (first step ST1), the laser LB passing through the workpiece W reaches the slag-coating conveyor 2. The laser LB reaching the slag-coating conveyor 2 heats up a set of conveyor plates 3, including the first conveyor plate 3-1 and the second conveyor plate 3-2. The first conveyor plate 3-1, the second conveyor plate 3-2, etc., deform due to thermal expansion.

[0199] In the second step ST2, the slag coating D is conveyed. The second step ST2 is the slag coating conveying process. In this process, a set of conveyor plates 3, comprising a first conveyor plate 3-1 extending along the first direction DR1 and a second conveyor plate 3-2 adjacent to the first conveyor plate 3-1 and extending along the first direction DR1, conveys the slag coating D generated by irradiating the workpiece W with laser LB. More specifically, the set of conveyor plates 3 conveys the slag coating D from the processing area RG1 to the discharge area RG2.

[0200] like Figure 15 , Figure 18 , Figure 20 , Figure 23 , Figure 38 or Figure 41 As illustrated, the first conveyor plate 3-1 has a first front end portion 3f-1, a first rear end portion 3e-1, and a first intermediate portion 3m-1 connecting the first front end portion 3f-1 and the first rear end portion 3e-1. Furthermore, the first intermediate portion 3m-1 has a first recess Q1 extending along a first direction DR1. The second conveyor plate 3-2 has a second front end portion 3f-2, a second rear end portion 3e-2, and a second intermediate portion 3m-2 connecting the second front end portion 3f-2 and the second rear end portion 3e-2. Furthermore, the second intermediate portion 3m-2 has a second recess Q2 extending along the first direction DR1.

[0201] The second step, ST2 (slag conveying process), is performed in parallel with the first step, ST1 (workpiece processing). More specifically, while the slag conveyor 2 is driven (in other words, while a set of conveyor plates 3 are moving along the circular track OB), laser LB is irradiated onto the workpiece W from the laser irradiation device 60. By irradiating the workpiece W with laser LB, slag D and / or cut pieces CF are generated intermittently or continuously, and the generated slag D and / or cut pieces CF are sequentially conveyed by the slag conveyor 2.

[0202] exist Figure 14 , Figure 16 , Figure 17 , Figure 19 , Figure 21 , Figure 22 , Figure 37 or Figure 40 In the recorded example, when the direction of thermal deflection of the first intermediate portion 3m-1 by irradiating the first recess Q1 with laser LB is opposite to the direction of thermal deflection of the first front end portion 3f-1 by irradiating the first front end portion 3f-1 with laser LB, thereby suppressing the thermal deflection of the first conveyor plate 3-1, the workpiece processing step (processing workpiece W) is performed (see, if necessary). Figure 6 and Figure 7(The direction of thermal deflection is shown). Therefore, although the first conveyor plate 3-1 undergoes thermal deformation due to laser irradiation, the large thermal deformation that reaches thermoplastic deformation is suppressed.

[0203] In addition, Figure 14 , Figure 16 , Figure 17 , Figure 19 , Figure 21 , Figure 22 , Figure 37 or Figure 40 In the described example, the direction of thermal deflection of the second intermediate portion 3m-2 by irradiating the second recess Q2 with laser LB is opposite to the direction of thermal deflection of the second front end portion 3f-2 by irradiating the second front end portion 3f-2 with laser LB, thereby suppressing thermal deflection of the second conveyor plate 3-2, and the workpiece processing step (processing workpiece W) is performed. Therefore, although the second conveyor plate 3-2 undergoes thermal deformation due to laser irradiation, the large thermal deformation reaching thermoplastic deformation is suppressed.

[0204] In the third step ST3, a set of conveyor plates 3 is cooled. The third step ST3 is a cooling process. For example, the cooling process is carried out by natural cooling (third step ST3). More specifically, after the workpiece W is processed, the cooling process is carried out by placing a set of conveyor plates 3 at room temperature.

[0205] Alternatively, the cooling process may also include the forced cooling of a set of conveyor plates 3 using at least one of an air-cooled cooling device 95a and a liquid-cooled cooling device 95b. For example, as Figure 35 As illustrated, the cooling process may also include an air-cooled cooling device 95a blowing air onto a set of conveyor plates 3. Alternatively or additionally, the cooling process may also include passing a set of conveyor plates 3 through a liquid tank 97 containing liquid (e.g., water). Furthermore, the cooling process may also include a liquid-cooled cooling device 95b blowing liquid (e.g., water) onto a set of conveyor plates 3.

[0206] Forced cooling of a set of conveyor plates 3 using at least one of an air-cooled cooling device 95a and a liquid-cooled cooling device 95b can also be performed in parallel with the workpiece processing step (first step ST1) and the slag conveying step (second step ST2).

[0207] In the workpiece processing method of the third embodiment, since the thermoplastic deformation of the first conveyor plate 3-1 is suppressed, the first conveyor plate 3-1, after being cooled in the cooling process, returns to its original shape before heat deformation. Furthermore, in the workpiece processing method of the third embodiment, since the thermoplastic deformation of the second conveyor plate 3-2 is suppressed, the second conveyor plate 3-2, after being cooled in the cooling process, returns to its original shape before heat deformation. By repeatedly performing the first step ST1 to the third step ST3 described above, although each of the conveyor plates 3 undergoes slight plastic deformation, the plastic deformation is reduced to a level that avoids hindering the operation of the slag conveyor 2.

[0208] This invention is not limited to the embodiments or modifications described above. It is obvious that appropriate modifications or alterations can be made to the embodiments or modifications within the scope of the inventive concept. Furthermore, as long as no technical contradiction arises, the various techniques used in the embodiments or modifications can also be applied to other embodiments or modifications. Moreover, any additional structures in the embodiments or modifications can be appropriately omitted. Explanation of reference numerals in the attached figures

[0209] 1. Laser processing device (1A, 1B); 2. Slag conveyor (2A, 2B); 3. Conveyor plate (3'); 3-1 First conveyor plate (3-1); 3-2 Second conveyor plate (3-2); 3-3 Third conveyor plate (3-3); 3-N Conveyor plate (3a, 3a-1, 3a-2, 3a-3 Left end); 3b, 3b-1, 3b-2, 3b-3 Right end; 3e Rear end (3e-1 First rear end); 3e-2 Second rear end (3e-2); 3e-3 Third rear end (3e-N); Rear end of conveyor plate 3-N (3e-N); 3f Front end (3f-1 First front end); 3f-2 Second front end (3f-2); 3f-3 Third front end (3f-3); 3m Middle section (3m-1 First middle section); 3m-2 Second middle section (3m-3); 3n Back side (3n-1 First back side); 3n-2 Second back side (3n-2); 3u Conveyor surface (3u-1) First conveying surface, 3u-2; Second conveying surface, 4, 4-1, 4-2; Laser reflective layer, 7; Moving device, 8; Control device, 11; Transfer device, 12; Workpiece transfer device, 12a; Plate transfer device, 13; Container, 15; Second conveyor, 21; First annular component, 21a; First annular chain, 22; Second annular component, 22a; Second annular chain, 28; Sprocket, 28a; First sprocket, 28b; Second sprocket, 28c; Third sprocket, 28d; Fourth sprocket, 29; Drive device, 30e-1; First rear receiving part, 30e-2; Second rear receiving part, 30f-1; First front receiving part, 30f-2; Second front receiving part, 35-1; First base component, 35-2; Second base component, 35u; Surface of the first base component, 60; Laser irradiation device, 61; Laser head, 63; Laser source, 65; Optical component, 70; Base, 71; First moving device, 71a First moving body, 71b First drive unit, 73 Second moving unit, 73a Second moving body, 73b Second drive unit, 75 Third moving unit, 75a Third moving body, 75b Third drive unit, 80 Hardware processor, 82 Memory, 84 Communication circuit, 86 Input device, 88 Bus, 90 Workpiece support member, 91 Plate member, 92 Top, 93 Frame, 95, 95a, 95b Cooling device, 96 Air jet device, 97 Liquid tank, 121 Suction cup, 822 Machining program, 826 Workpiece data, 862 Display with touch panel, AX1 Forward tilting axis, AX2 Rear tilting axis, B1 First surrounding track, B2 Second surrounding track, BA1 First buckling section, BA2 Second buckling section, BB1, BB2, BC1 Buckling section, BT Bolt, C1 Boundary section, CF Cutting piece, CL Ramp, CP, CP1, CP2 Convex bend, D slag, DR1 in the first direction, DR2 in the second direction, DR3 in the third direction.DR4 Fourth direction, E1 Rear end edge of conveyor plate 3-N, E2 Front top edge of second conveyor plate, E3 Rear end edge of first conveyor plate, E4 Front top edge of third conveyor plate, E5 Point in the concave conveyor surface located on the third direction side, E6 Deepest part of the concave conveyor surface, E7 End of the first concave part on the fourth direction side, EG Edge part, FP1 Flat plate part, FP1-1 First flat plate part, FP1-2 Second flat plate part, FP2 Flat plate part, G1 Spacing between the first and second surrounding tracks, L1 Length of the first conveyor plate, L2 Depth of the concave conveyor surface, L3 Distance between the deepest part of the concave conveyor surface and the first plane, LB Laser, OB Surround track, OP Injection port, PL1 First plane, PT Tray, Q1, Q1-1, Q1-2 First concave part, Q2 Second concave part, QP1, QP2 Concave curved part, R1 Injection command, RD1 First rod, RD2 Second rod, RD3 Third rod, RG1 Processing area, RG2 discharge area, RG3 take-out area, S movement command, SD1, SD2 concave conveying surfaces, SN1 protruding surface, SU1, SU2 convex conveying surfaces, T1 thickness of the first concave portion, TP standing setting part, TP1 first standing setting part, TP2 second standing setting part, W workpiece, Wb processed workpiece, W1 width of the first conveyor plate, W2 width of the second conveyor plate, h1, h2 holes.

Claims

1. A slag-coating conveyor, wherein, The device comprises a set of conveyor plates, including a first conveyor plate extending along a first direction and a second conveyor plate disposed adjacent to the first conveyor plate and extending along the first direction, for conveying slag generated by irradiating a workpiece with a laser. The first conveyor plate includes: First front end; First rear end portion; and The first intermediate portion has a first recess extending along the first direction and connects the first front end portion and the first rear end portion. By irradiating the first front end with the laser, the direction of thermal deflection of the first front end is opposite to the direction of thermal deflection of the first middle portion by irradiating the first recess with the laser, thereby suppressing the overall thermal deformation of the first conveyor plate. The first intermediate portion has a flat plate portion that is independent of the first recess. The first recess is connected to the flat plate by means of a buckling portion extending along the first direction.

2. The slag conveyor according to claim 1, wherein, In a cross-section perpendicular to the first direction, the first recess has a generally arcuate shape, a generally V-shaped shape, or a generally U-shaped shape.

3. The slag conveyor according to claim 1 or 2, wherein, The first rear end of the first conveyor plate is configured to overlap with the second front end of the second conveyor plate.

4. The slag conveyor according to claim 1 or 2, wherein, The first rear end of the first conveyor plate is hinged to the second front end of the second conveyor plate.

5. The slag conveyor according to claim 1 or 2, wherein, When the direction from the back of the first conveyor plate toward the conveying surface of the first conveyor plate is defined as a third direction, and the direction opposite to the third direction is defined as a fourth direction, the first recess is recessed toward the fourth direction. The first front end has a convex conveying surface that protrudes toward the third party. The first intermediate portion has a concave conveying surface that is recessed in the fourth direction.

6. The slag conveyor according to claim 5, wherein, The depth of the concave conveying surface is greater than the thickness of the first concave portion.

7. The slag conveyor according to claim 1 or 2, wherein, The first front end portion has a convex curved portion extending along the first direction.

8. The slag conveyor according to claim 1 or 2, wherein, Viewed along the first direction, the first front end and the first recess form an approximate S-shape.

9. The slag conveyor according to claim 1 or 2, wherein, At least a portion of the conveying surface of the first conveyor plate is formed by the surface of the laser reflective layer.

10. A laser processing apparatus, comprising: A laser irradiation device, comprising a laser head that irradiates a workpiece with laser light; A moving device that moves the laser head relative to the workpiece support member supporting the workpiece; Control device, controlling the laser irradiation device and the moving device; as well as Slag conveyor The slag-coating conveyor includes a set of conveyor plates, comprising a first conveyor plate extending along a first direction and a second conveyor plate adjacent to the first conveyor plate and extending along the first direction, for conveying slag generated by irradiating the workpiece with the laser. The first conveyor plate includes: First front end; First rear end portion; and The first intermediate portion has a first recess extending along the first direction and connects the first front end portion and the first rear end portion. By irradiating the first front end with the laser, the direction of thermal deflection of the first front end is opposite to the direction of thermal deflection of the first middle portion by irradiating the first recess with the laser, thereby suppressing the overall thermal deformation of the first conveyor plate. The first intermediate portion has a flat plate portion that is independent of the first recess. The first recess is connected to the flat plate by means of a buckling portion extending along the first direction.

11. The laser processing apparatus according to claim 10, wherein, It includes a cooling device for forced cooling of a set of the conveyor plates.

12. A method for machining a workpiece, comprising: A process of processing a workpiece by irradiating it with a laser, wherein thermal deflection in the opposite direction is canceled out; and A set of conveyor plates, comprising a first conveyor plate extending along a first direction and a second conveyor plate disposed adjacent to the first conveyor plate and extending along the first direction, is used to convey a process in which slag generated by irradiating the workpiece with the laser is transported. The first conveyor plate includes: First front end; First rear end; as well as The first intermediate portion has a first recess extending along the first direction and connects the first front end portion and the first rear end portion. The first intermediate portion has a flat plate portion that is independent of the first recess. The first recess is connected to the flat plate by means of a buckled portion extending along the first direction. The process of processing the workpiece is performed while the direction of thermal deflection of the first intermediate portion by irradiating the first recess with the laser is opposite to the direction of thermal deflection of the first front end by irradiating the first front end with the laser, thereby suppressing thermal deflection of the first conveyor plate.

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