Laser cutting device

Abstract

In a laser cutting apparatus (1), a capturing portion (4) is movable in a first direction (X) together with a laser head (3) to capture dust generated by cutting. A capturing hopper (5) is disposed on a first side (21) of a machine room (2). A suction device (6) is connected to the capturing hopper (5) to suck the dust moved from the capturing portion (4) to the capturing hopper (5). The capturing portion (4) has a box portion (41) and an airflow generating portion (42). A first opening (436) and an opening end (441) are formed on the box portion (41). The first opening (436) is opposite to the laser head (3) and along a second direction (Y). The opening end (441) has a second opening (442) opened toward the capturing hopper (5).

Description

Technical Field

[0001] This disclosure relates to a laser cutting apparatus. Background Technology

[0002] In recent years, laser cutting devices, which use laser cutting machines for cutting, have been used in stamping production lines instead of stamping by stamping machines (see, for example, Patent Documents 1 and 2). In order to ensure the productivity of the stamping production line, laser cutting also requires high speed and effective capture of the large amount of dust, fumes, or end material dust generated by high-speed cutting.

[0003] In Patent Document 1, a dust-collecting container is arranged below the laser head, holding the workpiece, and the container is configured to move along the conveying direction with the laser head. In Patent Document 2, a belt conveyor for collecting end materials is arranged below the laser head, holding the workpiece, and the belt conveyor mechanism is configured to move along the conveying direction with the laser head.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Publication No. 2018-516760

[0007] Patent Document 2: Japanese Patent Application Publication No. 2004-50184 Summary of the Invention

[0008] Although not described in the aforementioned patent documents 1 and 2, the laser cutting device is housed inside the machine room to prevent the laser from leaking to the outside, and the dust collected by the container or belt conveyor needs to be transported out of the machine room.

[0009] However, neither Patent Documents 1 nor 2 discloses a structure for moving dust captured by a container or belt conveyor to the outside of the machine room.

[0010] The purpose of this invention is to provide a laser cutting device that corresponds to high-speed cutting and can move the dust generated by cutting outside the machine room.

[0011] (Technical solution used to solve the problem)

[0012] The first disclosed laser cutting apparatus includes a machine chamber, a laser head, a collecting section, a collecting hopper, and a suction section. The machine chamber is used to cut workpieces using a laser. The laser head is movable in a first direction parallel to the workpiece conveying direction and in a second direction orthogonal to the first direction. The collecting section moves along the laser head in the first direction to collect dust generated during cutting. The collecting hopper is disposed on a first side of the machine chamber to collect dust. The suction section is connected to the collecting hopper and sucks up dust moving from the collecting section to the collecting hopper. The collecting section has a box section and a first airflow generating section. The box section has a first opening and an opening end. The first opening faces the laser head and extends along the second direction. The opening end has a second opening facing the collecting hopper.

[0013] (Invention Effects)

[0014] According to the present invention, a laser cutting device is provided that is capable of handling high-speed cutting and moving the dust generated by the cutting process outside the machine room. Attached Figure Description

[0015] Figure 1 This is an overall perspective view of the laser cutting apparatus according to Embodiment 1 of this disclosure.

[0016] Figure 2 This is an enlarged perspective view of the laser cutting apparatus according to Embodiment 1 of this disclosure.

[0017] Figure 3 This is a cross-sectional view of the laser head area of ​​the laser cutting apparatus according to Embodiment 1 of this disclosure.

[0018] Figure 4 This is a perspective view showing the dust collection section and drive mechanism of the laser cutting apparatus according to Embodiment 1 of this disclosure.

[0019] Figure 5 This is a perspective view showing the dust collection unit, drive mechanism, and dust collection hopper of the laser cutting apparatus according to Embodiment 1 of this disclosure.

[0020] Figure 6 This is a schematic diagram showing the flow of air in the laser cutting apparatus according to Embodiment 1 of this disclosure.

[0021] Figure 7 This is an overall perspective view of the laser cutting device in Embodiment 2 of this disclosure.

[0022] Figure 8 This is a cross-sectional view of the laser cutting apparatus of Embodiment 2 of this disclosure, perpendicular to the conveying direction.

[0023] Figure 9 This is a cross-sectional view of the laser cutting apparatus in a modified embodiment 2 of this disclosure, perpendicular to the conveying direction. Detailed Implementation

[0024] Hereinafter, a laser cutting apparatus according to an embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0025] (Implementation Method 1)

[0026] The laser cutting apparatus of Embodiment 1 of this disclosure will now be described.

[0027] (Overview of laser cutting device 1)

[0028] Figure 1 This is an overall perspective view of the laser cutting apparatus 1 according to the embodiment. The laser cutting apparatus 1 is used in a laser cutting production line to cut desired shapes from steel plates (workpieces), for example. The laser cutting production line includes an uncoiler, a leveler, a laser cutting apparatus, a cleaning apparatus, and a stacking machine, etc.

[0029] The steel sheet is wound into a coil and conveyed from the uncoiler to the leveler to correct the coil marks. After the coil marks are corrected, the steel sheet is conveyed to the laser cutting device to cut it into the desired shape. Then, the steel sheet cut into the desired shape is conveyed to the cleaning device for cleaning, and then stacked by the stacking machine.

[0030] Furthermore, the first direction, encompassing the upstream and downstream directions of the conveying direction of workpiece W, is denoted as X, and the second direction, the width direction perpendicular and horizontal to the first direction X, is denoted as Y. Additionally, the vertical direction perpendicular to both the first direction X and the second direction Y is denoted as the third direction Z. In the second direction Y, the left direction towards the downstream side of the conveying direction in the first direction X is denoted as Y1, and the right direction is denoted as Y2.

[0031] Laser cutting device 1 includes a machine chamber 2 and a laser head 3 (see reference). Figure 2 ), 4. Collection section, 5. Collection hopper, 6. Suction device (an example of a suction section), 7. End material separation and recovery section (see reference) Figure 6 ), fan panel 8 (an example of the second airflow generating unit), airflow adjustment component 9 (an example of the airflow adjustment unit) (see reference) Figure 5 ) and the surrounding trapping section 10.

[0032] The workpiece W is cut inside machine room 2. Additionally, in... Figure 1 In the diagram, to illustrate the internal structure, the machine chamber 2 is represented by a double-dotted line. The laser head 3 outputs a laser beam to cut the workpiece W. The collecting section 4 collects dust, fumes, or end-piece material dust generated during laser cutting. The collected dust is propelled by the airflow within the collecting section 4 towards the second opening 442 on the side of the collecting hopper 5 (see reference). Figure 4Furthermore, the intake airflow from the first opening 436 is generated not by negative pressure but by the Venturi effect produced by the airflow. Dust, fumes, or end materials captured by the collecting section 4 move from the collecting section 4 to the collecting hopper 5. The suction device 6 sucks up the dust, fumes, or end materials moving to the collecting section 4 via the collecting hopper 5. The end material separation and recovery section 7 separates and recovers the end materials from the dust or fumes moving to the collecting hopper 5. The fan panel 8 generates an airflow to move dust or fumes generated on the upper surface of the workpiece W to the collecting hopper 5. The airflow adjustment component 9 adjusts the airflow flowing from the fan panel 8 into the collecting hopper 5. The head-peripheral collecting section 10 captures dust or fumes generated around the laser head 3.

[0033] (Room 2)

[0034] The machine room 2 shields the space for cutting workpiece W from the external space so that the laser does not leak to the outside.

[0035] The workpiece W, which has passed through the leveling machine, is conveyed to machine chamber 2 via a conveyor mechanism (not shown). Laser cutting is performed inside machine chamber 2. Machine chamber 2 houses the laser head 3, the collecting unit 4, and the fan panel 8, etc. The workpiece, cut into the desired shape by the laser, is conveyed from machine chamber 2.

[0036] like Figure 1 As shown, the machine chamber 2 has a first side 21 on which the collecting hopper 5, described later, is disposed, and a second side 22 opposite to the first side 21 on which a fan panel 8 is disposed. The workpiece W is conveyed between the first side 21 and the second side 22.

[0037] (Laser head 3)

[0038] Figure 2 This is a magnified stereoscopic view of the area near laser head 3. Figure 3 This is a view of the vicinity of laser head 3 observed along the leftward direction Y1. Figure 2 and Figure 3 In this text, to indicate the laser head 3, the portion of the right-hand side (Y2 side) of the side 104 of the cover 101 described later is omitted.

[0039] The laser head 3, for example, emits a high-output fiber laser beam toward the workpiece W. The laser head 3 is located above the workpiece W and can move in the first direction X and the second direction Y. Additionally, a height simulation mechanism in the Z-axis direction is provided to maintain a constant cutting height (the distance between the workpiece and the nozzle) in accordance with the bending of the workpiece W. Figure 3 As shown, the laser head 3 has a downward-facing laser emission section 35, from which laser light is emitted downwards. Figure 1 As shown, the drive mechanism 30 that moves the laser head 3 along the first direction X and the second direction Y is disposed in the machine room 2.

[0040] like Figure 1 and Figure 2 As shown, the drive mechanism 30 has a first carriage 31, a second carriage 32, and a pair of guide rails 33. The first carriage 31 is elongated along a second direction Y. The second carriage 32 is supported by the first carriage 31 in a manner that allows it to move in the second direction Y. The second carriage 32 supports the laser head 3. The pair of guide rails 33 are respectively disposed along the upper surface of the first carriage 31 along the second direction Y. A plurality of blocks disposed on the second carriage 32 are fitted into the pair of guide rails 33. In addition, a linear motor (not shown) can be used as an actuator to drive the second carriage 32 relative to the first carriage 31. For example, a permanent magnet is disposed along the guide rail 33, and a coil is provided on the second carriage 32. By energizing the coil, the second carriage 32 can be moved along the guide rail 33.

[0041] Furthermore, although not shown in the diagram, the first carriage 31 is movably supported on a frame 23 fixed to the machine compartment 2 along a first direction X. A guide rail (not shown) is arranged on the frame 23, for example, along the first direction X, and a block provided on the first carriage 31 engages with the guide rail. Additionally, a linear motor can be used as the actuator for the movement of the first carriage 31 relative to the frame.

[0042] (Collection part 4)

[0043] Figure 4 This is a perspective view of the capturing section 4 and the drive mechanism 30 viewed from the right side (Y2). Figure 5 This is a perspective view of the collection section 4, the drive mechanism 30, and the collection hopper 5 from the left side (Y1).

[0044] The collecting unit 4 is configured to clamp the conveyed workpiece W below the laser head 3. For example... Figure 4 As shown, the collection unit 4 has a box section 41 and an airflow generating section 42. Figure 5 The airflow generating section 42 is omitted in the text.

[0045] The housing 41 is positioned below the laser head 3. The housing 41 collects dust, fumes, or end material generated during laser cutting. The housing 41 is elongated along the Y direction. The housing 41 is connected to the first carriage 31 via a frame (not shown), and is configured to move together with the laser head 3 in the first direction X.

[0046] (Box 41)

[0047] The housing 41 has a first housing 43 and a second housing 44. The first housing 43 is formed along the second direction Y. The first housing 43 is provided throughout the conveying width of the workpiece W, and the length of the first housing 43 is greater than the range of movement of the laser head 3 in the second direction Y.

[0048] The first box 43 is roughly rectangular in shape. The first box 43 has a first side 431, a second side 432, a third side 433, a bottom surface 434, and a top surface 437.

[0049] like Figure 2 As shown, the first side surface 431 is disposed upstream of the first side surface in the first direction X. The second side surface 432 is disposed downstream of the first side surface 431, opposite to it. The first side surface 431 and the second side surface 432 are disposed perpendicular to the first direction X. The first side surface 431 and the second side surface 432 are spaced at the same distance from their lower ends to near their upper ends. The first side surface 431 and the second side surface 432 have a narrower interval near their upper ends. Rollers or the like for conveying workpieces can be disposed on the outer side near the upper ends of the first side surface 431 and the second side surface 432. The third side surface 433 is disposed on the left side in the Y1 direction, connecting the left-side Y1 ends of the first side surface 431 and the second side surface 432.

[0050] like Figure 2 As shown, the bottom surface 434 connects the lower ends of the first side surface 431, the second side surface 432, and the third side surface 433. The bottom surface 434 is formed in a stepped shape with multiple steps, descending downwards in the right direction Y2 (see reference). Figure 6 The top surface 437 connects to the upper ends of the first side surface 431, the second side surface 432, and the third side surface 433.

[0051] A slit-shaped first opening 436 is formed on the top surface 437. The first opening 436 is positioned above the range of motion of the laser head 3 in the second direction Y. Dust, fumes, or end material generated by laser cutting falls through the first opening 436 and is collected in the first box 43.

[0052] like Figure 4 and Figure 5 As shown, the second box 44 is formed in a cylindrical shape along the second direction Y. The second box 44 is positioned toward the collection hopper 5 from the left end of the first side surface 431, the left end of the second side surface 432, the left end of the bottom surface 434, and the left end of the top surface 437. The second box 44 has an open end 441, which forms a second opening 442 facing the collection hopper 5. The second box 44 is inclined downwards along the right direction Y2. The second opening 442 is formed perpendicular to the second direction Y.

[0053] (Airflow generating unit 42)

[0054] Figure 6 This is a schematic cross-sectional view of the laser cutting device 1 perpendicular to the first direction X.

[0055] The airflow generating unit 42 generates airflow toward the second opening 442 within the housing 41. The airflow generating unit 42 has a plurality of blowing nozzles 421. The plurality of blowing nozzles 421 are disposed on the bottom surface 434 of the first housing 43.

[0056] A plurality of stepped surfaces 435 are provided on the bottom surface 434. The height of the bottom surface 434 decreases sequentially toward the collecting hopper 5. The stepped surfaces 435 are arranged perpendicular to the second direction Y and parallel to the first direction X. Air blowing nozzles 421 are respectively disposed on each of the plurality of stepped surfaces 435. It should be noted that, in the figure, the air blowing nozzles 421 and a portion of the stepped surfaces 435 are labeled with reference numerals.

[0057] Gas is ejected from the blow nozzle 421 into the interior of the first chamber 43. The blow nozzle 421 ejects gas in the second direction Y, directed toward the second opening 442. This generates an airflow (refer to arrow A) on the bottom surface 434 of the first chamber 43 toward the second opening 442, which flows into the second chamber 44 and exits from the second opening 442 (refer to arrow B). Through this airflow, dust, fumes, or end material captured by the first chamber 43 is blown out through the second chamber 44 and from the second opening 442 into the collection hopper 5. Furthermore, by generating airflow on the bottom surface of the first chamber 43, a Venturi effect is induced, generating a suction airflow into the first chamber 43 at the first opening 436 (refer to arrow C). Therefore, leakage of dust or fumes from the first opening 436 is prevented.

[0058] (Collection hopper 5, Suction device 6)

[0059] The collecting hopper 5 collects dust, smoke, or end material blown out from the second opening 442. The collecting hopper 5 has a collecting opening 51. The collecting opening 51 is formed above the range of movement of the box portion 41 in the first direction X. More specifically, as... Figure 5 As shown, the collection port 51 is formed along the first direction X within the range that the housing portion 41, which moves together with the laser head 3, can move, such that the open end 441 can be inserted into the collection port 51. The collection port 51 is formed as a rectangle that is longer in the first direction X.

[0060] like Figure 5 As shown, the collection port 51 has a first region 51a and a second region 51b. The first region 51a is the region into which the opening end 441 can be inserted. Dust, smoke, or end material is blown into the inside of the collection hopper 5 through the second opening 442 and the first region 51a.

[0061] The second region 51b is the upper part of the first region 51a in the collection port 51. The airflow adjustment component 9, which will be described later, is arranged in the second region 51b.

[0062] The collecting hopper 5 protrudes outward from the collecting port 51 toward the outside of the machine chamber 2. The collecting hopper 5 is configured such that its length in the first direction X and its height in the third direction decrease as it extends outward from the collecting port 51. Figure 1 As shown, the outer end of the collecting hopper 5 is connected to the pipe hose 61 of the suction device 6. The suction device 6 sucks up and collects the dust or smoke blown onto the collecting hopper 5.

[0063] (End Material Separation and Recycling Section 7)

[0064] like Figure 6 As shown, the end-material separation and recycling unit 7 includes a separation plate 71 and a recycling trolley 72. The separation plate 71 is arranged opposite to the first region 51a in the collection port 51. The separation plate 71 is inclined such that its upper end is closer to the first region 51a than its lower end. A hole (not shown) is formed on the bottom surface of the collection hopper 5 between the lower end of the separation plate 71 and the collection port 51. The recycling trolley 72 is arranged below this hole.

[0065] Dust, fumes, or end-piece materials blown from the housing 41 to the collection port 51 are lighter and therefore pass over the separation plate 71 and are sucked up by the suction device 6, as shown by arrow C. However, end-piece materials (shown as WE in the figure) collide with the separation plate 71 and fall downwards through the hole onto the recovery trolley 72 (refer to arrow D). The operator can move the recovery trolley 72 to recover the end-piece materials. In addition, since the recovery trolley 72 is located on the outside of the machine room 2, the operator can recover the end-piece materials without entering the inside of the machine room 2.

[0066] (Fan panel 8, airflow adjustment component 9)

[0067] like Figure 1 As shown, the fan panel 8 is disposed on the second side 22 of the machine compartment 2. The fan panel 8 is disposed along the first direction X. The fan panel 8 generates airflow toward the rightward direction Y2. Figure 6 As shown, the fan panel 8 is opposite to the second region 51b of the aforementioned collection port 51. The fan panel 8 is positioned above the range where the laser head 3 can move in the first direction X.

[0068] like Figure 5 As shown, the airflow adjustment component 9 is arranged in a manner that covers the second region 51b of the collection port 51 of the collection hopper 5. The region 51a in the collection port 51 where the airflow adjustment component 9 is not arranged is the first region 51a. The airflow adjustment component 9 has multiple through holes, which can adjust the airflow. For example, a mesh-like component or punching metal can be used as the airflow adjustment component 9.

[0069] Furthermore, during the piercing process at the start of cutting, dust and fumes are generated from the surface of workpiece W before it is penetrated by the laser. The dust or fumes generated on the surface of workpiece W are moved towards the collection hopper 5 via the airflow generated by the fan panel 8 and the airflow adjustment component 9. Additionally, the airflow adjustment component 9 generates resistance, thereby ensuring suction force in the first region 51a.

[0070] (Head-surrounding trapping section 10)

[0071] The surrounding collection section 10 collects dust or fumes generated from the surface of the workpiece W near the laser head 3.

[0072] like Figure 3 As shown, the head-peripheral trapping section 10 has a hood 101 and a duct 102. The hood 101 surrounds the sides and top of the laser emitting section 35 of the laser head 3. A spatter sheet can be used as the hood 101. The hood 101 has a side surface 104 and a top surface 103. The side surface 104 is arranged to surround the horizontal periphery of the laser emitting section 35. The laser head 3 is disposed through the top surface 103. The top surface 103 is disposed above the laser emitting section 35. A through hole is formed in the top surface 103, and one end 102a of the duct 102 is connected to this through hole. Figure 5 As shown, the other end 102b of pipe 102 is connected to the second box 44. Pipe 102 is connected near the second opening 442 of the second box 44. Pipe 102 is connected to the second box 44 from above.

[0073] An airflow generated by the airflow generating unit 42 is generated in the second chamber 44. This airflow induces the Venturi effect, generating an airflow from the cover 101 toward the second chamber 44 within the pipe 102 (refer to arrow D). As a result, dust and fumes generated near the laser head 3 during laser cutting can be transported to the second chamber 44 via the pipe 102 and blown out of the second chamber 44 to the collection hopper 5 through the second opening 442.

[0074] (Implementation Method 2)

[0075] The laser cutting apparatus of Embodiment 2 of this disclosure will now be described. Unlike Embodiment 1, the laser cutting apparatus of Embodiment 2 does not have a fan panel 8 but has an air vent, and airflow is generated in the machine chamber by the suction force of the suction device 6.

[0076] Figure 7 This is a diagram showing the structure of the laser cutting apparatus 201 according to Embodiment 2. Figure 7 In the diagram, the shape of machine room 202 is represented by a double-dotted line. Figure 8 This is a cross-sectional view of the laser cutting device 201 of Embodiment 2, perpendicular to the first direction X.

[0077] The laser cutting device 201 of this embodiment 2 has two laser heads 3. Figure 7 In the diagram, only one laser head 3 is shown, but two drive mechanisms 30 are shown that move the laser head 3 in the first direction X and the second direction Y. The two laser heads 3 are arranged opposite each other in the first direction X. Additionally, in Figure 7 and Figure 8 Although the head-around trapping section 10 around the laser head 3 is not shown in the figure, it can also be set.

[0078] Although not shown in Embodiment 1, a guide rail 223 into which the first carriage 31 of the drive mechanism 30 is fitted is disposed on the upper surface of each of the pair of left and right frames 23 along the first direction X. For example, by using a linear motor as an actuator, the first carriage 31 can be moved along the guide rail 223.

[0079] The shape of the collection port 251 of the laser cutting device 201 in Embodiment 2 is different from that of the collection port 51 of the collection hopper 5 in Embodiment 1. In the collection port 51 of Embodiment 1, a second region 51b is provided above the first region 51a of the insertion opening end 441, but the collection port 251 of Embodiment 2 does not have a portion corresponding to the second region 51b of Embodiment 1, but only a portion corresponding to the first region 51a of Embodiment 1. That is, in Embodiment 2, as... Figure 8 As shown, the length of the third direction Z of the collection port 251 is formed to be approximately the same as the length of the opening end 441 of the collection section 4.

[0080] In implementation method 1, such as Figure 1 As shown, a collection hopper 5 is arranged on the first side 21 of the machine chamber 2. The first side 21 of the machine chamber 2 is positioned in the second direction Y at approximately the same position as the collection port 51. However, in this embodiment 2, as... Figure 8 As shown, the collection hopper 205 is disposed inside the machine chamber 202, and the first side 221 of the machine chamber 202 is positioned to the right (Y2 side) of the collection port 251. The collection port 251 is disposed on the first side 221 of the machine chamber 202 and opens to the left (Y1 side). The collection port 251 is positioned closer to the first side 221 than the second side 22. The collection port 251 is formed on the frame 23 on the right (Y2 side).

[0081] The laser cutting device 201 in Embodiment 2 differs from that in Embodiment 1 in that it does not have a fan panel 8 on its second side 22. Figure 7 and Figure 8 As shown, the laser cutting device 201 of Embodiment 2 has a vent 210 on the first side 221.

[0082] Vent 210 is provided at the conveyed workpiece W (in Figure 8 Above (indicated by dashed lines). Vent 210 is an opening formed on the first side surface 221. (As shown...) Figure 7 As shown, the vent 210 is formed along the first direction X. The vent 210 is located above the collection port 251 and has a length corresponding to the collection port 251 in the first direction X. Preferably, the vent 210 is arranged to extend beyond the range of motion of the laser head 3 in the first direction X. Alternatively, the vent 210 may be formed from the upstream end to the downstream end of the first side surface 221 in the first direction X. Through the suction of the suction device 6, air flows from the outside into the interior of the chamber 202 via the vent 210.

[0083] like Figure 7 and Figure 8 As shown, the laser cutting device 201 has a first shielding plate 211 and a second shielding plate 212. The first shielding plate 211 and the second shielding plate 212 guide the flow of air, so that the air flowing into the machine chamber 202 from the vent 210 follows a certain direction. Figure 8 The flow movement is indicated by arrow D.

[0084] like Figure 8 As shown, the first shielding plate 211 is disposed below the vent 210. The first shielding plate 211 is disposed at approximately the same height as the workpiece W. The first shielding plate 211 extends from the frame 23 on the Y2 side to the first side surface 221. The first shielding plate 211 is disposed above the collection port 251. The first shielding plate 211 is plate-shaped, and its main surface is configured to be perpendicular to the third direction Z. Figure 7 As shown, the first shielding plate 211 is formed from the downstream end of the machine room 202 in the first direction X to the upstream end.

[0085] like Figure 8 As shown, the second shielding plate 212 protrudes from the frame 23 on the left-hand Y1 side towards the second side 22 side. The second shielding plate 212 is positioned at the same height as the first shielding plate 211 in the third-hand Z direction. The second shielding plate 212 is plate-shaped, and its main surface is formed perpendicular to the third-hand Z direction. Figure 7 As shown, the second shielding plate 212 extends from the downstream end of the machine chamber 202 in the first direction X to the upstream end. An air passage space is formed between the second shielding plate 212 and the second side surface 22. The first shielding plate 211 and the second shielding plate 212 are configured to separate the flow of air vertically and vertically, with the upper surface of the workpiece W as the boundary.

[0086] A curved fairing 213 is disposed at the corner between the top surface 24 and the second side surface 22 of the engine room 202. The fairing 213 is curved outwardly.

[0087] A curved fairing 214 is disposed at the corner between the bottom surface 25 and the second side surface 22 of the engine room 202. The fairing 214 is curved outward.

[0088] Inside the vent 210, a rectifier plate 215 is disposed from the first side 221 toward the second side 22. For example... Figure 8 As shown, in this embodiment 2, three rectifier plates 215 are arranged in a vertical direction. The main surface of each rectifier plate 215 is arranged parallel to the first direction X and the second direction Y. The rectifier plates 215 are formed along the first direction X. In order to capture dust and fumes generated on the upper surface of the workpiece W, it is necessary to create airflow through the upper surface of the workpiece W. Therefore, in the second direction Y, the left end of the rectifier plate 215 on the Y1 side is positioned further to the right than the frame 23 on the Y2 side.

[0089] A light absorber 216 is applied to the rectifier plate 215. The light absorber 216 prevents scattered laser light from leaking out from the vent 210. Specifically, the light absorber 216 is applied to the lower surface of the uppermost rectifier plate 215, the upper and lower surfaces of the middle rectifier plate 215, and the upper surface of the lowermost rectifier plate 215.

[0090] According to the above structure, the air that flows in from the vent 210 through the suction device 6 does not move directly toward the collection port 251 because it is provided with the first shielding plate 211, but moves toward the second side 22 (see reference). Figure 8 At this time, since the air passes through the upper surface of the workpiece W (the surface on the side of the laser head 3), the dust and smoke generated from the upper surface of the workpiece W are captured by the airflow and move with the air. The air towards the second side 22 moves along the rectifier plate 213 towards the bottom surface 25. The air towards the bottom surface 25 moves through the rectifier plate 214 towards the first side 221 and is drawn in from the collection port 251.

[0091] Thus, in this embodiment 2, although no fan is provided, by opening the vent 210, dust and smoke generated from the upper surface of the workpiece W due to the flow of air flowing in from the vent 210 can be captured from the collection port 251.

[0092] (Features, etc.)

[0093] (1) The laser cutting apparatus 1, 201 of this embodiment 1 and 2 includes a machine chamber 2, 202, a laser head 3, a collecting section 4, a collecting hopper 5, 205, and a suction device 6 (an example of the suction section). Inside the machine chamber 2, 202, a workpiece W is cut using a laser. The laser head 3 can move in a first direction X parallel to the conveying direction of the workpiece W and in a second direction Y orthogonal to the first direction X. The collecting section 4 can move together with the laser head 3 in the first direction X to collect dust generated by cutting. The collecting hoppers 5, 205 are arranged on the first side surfaces 21, 221 of the machine chamber 2 for collecting dust. The suction device 6 is connected to the collecting hoppers 5, 205 and sucks up the dust that moves from the collecting section 4 to the collecting hoppers 5, 205. The collecting section 4 has a box section 41 and an airflow generating section 42 (an example of the first airflow generating section). A first opening 436 and an opening end 441 are formed in the box section 41. The first opening 436 is opposite to the laser head 3 and extends along the second direction Y. The opening end 441 has a second opening 442 that opens toward the collection hopper 5.

[0094] Thus, the dust (dust, smoke or end material) generated by cutting is captured by the box section 41, and the captured dust is moved from the box section 41 to the collection hopper 5 through the airflow generating section 42 and is transported out of the machine room 2, 202.

[0095] Here, dust is blown away by the airflow generating unit 42 and moves from the box 41 to the collecting hoppers 5 and 205, which are not directly connected to the box 41.

[0096] Therefore, the housing 41 can easily move at high speed together with the laser head 3, enabling it to handle high-speed cutting. In addition, since the dust moving from the housing 41 to the collection hoppers 5 and 205 is transported out of the machine chambers 2 and 202, the dust can be moved out of the machine chambers 2 and 202 without stopping the device.

[0097] Furthermore, since the laser cutting devices 1 and 201 in this embodiment are not directly connected to the collecting hoppers 5 and 205 and the box section 41, their structure is simplified and they can be easily cleaned. Therefore, the frequency of production line shutdowns for cleaning or maintenance can be reduced, ensuring, for example, the high productivity required for automobile production lines.

[0098] Furthermore, by generating airflow towards the second opening 442 inside the housing 41 via the airflow generating section 42, a Venturi effect is induced, generating an inlet airflow from the first opening 436. This prevents dust from leaking out of the first opening 436 and effectively traps dust inside the housing 41.

[0099] (2) In the laser cutting apparatus 1, 201 of this embodiment 1, 2, the airflow generating unit 42 has an air blowing nozzle 421.

[0100] Therefore, dust can be blown out from the second opening 442 into the collection hoppers 5 and 205 by air blowing.

[0101] In addition, since only a gas hose needs to be connected to the housing 41 that moves together with the laser head 3, the structure is simple and can ensure maintainability and reliability.

[0102] (3) The laser cutting apparatus 1, 201 of this embodiment 1, 2 also includes a separation plate 71 and a recovery trolley 72 (an example of an end material recovery unit). The separation plate 71 is disposed on the collection hopper 5, 205 to separate the end material from the dust moving from the second opening 442. The recovery trolley 72 takes out the end material separated by the separation plate 71 from the collection hopper 5, 205.

[0103] This allows the end material to be transported out of the machine chambers 2 and 202 separately from dust and fumes. Furthermore, since it is not necessary to enter the machine chambers 2 and 202 to retrieve the separated end material, laser cutting can be continued without interruption, ensuring productivity.

[0104] (4) In the laser cutting apparatus 1 of this embodiment 1, the collecting hopper 5 has a collecting port 51 formed on a first side of the machine chamber 2. The collecting port 51 has a first region 51a into which an open end 441 can be inserted and a second region 51b disposed above the first region 51a. The laser cutting apparatus 1 also includes a fan panel 8 (an example of a second airflow generating unit) and an airflow adjustment member 9 (an example of an airflow adjustment unit). The fan panel 8 is disposed on the second side 22 of the machine chamber 2 opposite to the first side 21, and generates an airflow toward the second region 51b above the collecting unit 4. The airflow adjustment member 9 is disposed in the second region 51b and adjusts the airflow generated by the fan panel 8.

[0105] In this way, by using the second region 51b of the collection port 51 of the collection hopper 5, the addition of the fan panel 8 can effectively recover the dust or smoke generated on the upper surface of the workpiece during the piercing process at the start of cutting.

[0106] (5) The laser cutting apparatus 201 of this embodiment 2 also includes a vent 210. The vent 210 is located above the workpiece W and is disposed on the first side surface 221 to draw in external air. The collecting hopper 205 has a collecting port 251 formed on the first side surface 221 side of the machine chamber 202. By the suction of the suction device 6, an airflow is generated from the vent 210 through the upper surface of the workpiece W toward the collecting port 251.

[0107] Therefore, it is possible to effectively recover the dust or fumes generated on the upper surface of the workpiece W during the piercing process at the beginning of the cutting.

[0108] (6) The laser cutting apparatus 1 of this embodiment also includes a cover 101 and a conduit 102. The cover 101 is disposed around the laser emitting portion 35 of the laser head 3. The conduit 102 connects the cover 101 and the housing portion 41.

[0109] In this way, by connecting the pipe 102 to the housing 41, the airflow from the airflow generating unit 42 induces the Venturi effect. Consequently, dust or fumes generated on the upper surface of the workpiece W during the piercing process at the start of cutting are drawn into the second housing 44 through the pipe 102 and moved from the second housing 44 to the collection unit 4. Therefore, dust or fumes generated on the upper surface of the workpiece W can be effectively guided to the collection unit 4.

[0110] (Other implementation methods)

[0111] The above describes one embodiment of the present invention, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention.

[0112] (A) In the above embodiments 1 and 2, as Figure 6 As shown, the opening end 441 enters the inner side of the collection ports 51 and 251. However, if dust, smoke, or end material blown out from the opening end 441 does not fall and reaches the collection ports 51 and 251, the opening end 441 may not enter the collection ports 51 and 251. That is, a gap may also be provided between the second opening 442 formed in the opening end 441 and the collection port 51.

[0113] (B) In embodiments 1 and 2 described above, the air blowing nozzle 421 is arranged on all the step surfaces 435, but it is not limited to this. For example, it can be arranged every two steps, and can be changed appropriately.

[0114] (C) In the above embodiments 1 and 2, the airflow generating unit 42 has an air blowing nozzle 421, but it may not be limited to an air blowing nozzle. For example, it may be a fan or the like, as long as it can generate airflow.

[0115] (D) In ​​the above embodiments 1 and 2, a linear motor is used in the drive mechanism 30 of the laser head 3, but it is not limited to this. A ball screw or the like can also be used if high speed is not required.

[0116] (E) In the above embodiment 2, the vent 210 is disposed on the first side 221, but it is not limited thereto and may also be disposed on the second side 22.

[0117] Figure 9 This is a cross-sectional view of the laser cutting device 301, which has a vent 310 on the second side 22, perpendicular to the first direction X.

[0118] In the laser cutting apparatus 301, a vent 310 is formed on the second side 22. The vent 310 is located above the workpiece W. A plurality of rectifier plates 215 are arranged inside the vent 310, and a light-absorbing agent 216 is coated on the rectifier plates 215.

[0119] In the laser cutting apparatus 201 of Embodiment 2 described above, the collection port 251 of the collection hopper 205 is formed on the frame 23 on the right-hand Y2 side, but... Figure 9 In the laser cutting apparatus 301 shown, the collection port 351 of the collection hopper 305 is positioned further to the right in the Y2 direction than the frame 23. The second box 44 of the collection section 4 extends into the collection port 351. The laser cutting apparatus 301 has a flow straightener 313. The flow straightener 313 is formed from the upper end of the edge of the collection port 351 to the top surface 24. The flow straightener 313 is formed from the upstream end to the downstream end along the first direction X of the chamber 302. The flow straightener 313 has a vertical portion 313a and a curved portion 313b. The vertical portion 313a is formed vertically from the upper end of the edge of the collection port 351 toward the top surface 24. The curved portion 313b is positioned from the upper end of the vertical portion 313a to the top surface 24. The curved portion 313b is convexly curved toward the first side surface 221.

[0120] The laser cutting apparatus 301 has a first shielding plate 311 and a second shielding plate 312. The first shielding plate 311 extends from a first side surface 221 to a vertical portion 313a. The first shielding plate 311 is positioned at approximately the same height as the workpiece W. The first shielding plate 311 is positioned above the collection port 351. The first shielding plate 311 is plate-shaped, with its main surface configured perpendicular to a third direction Z. The first shielding plate 311 extends along a first direction X from the downstream end of the machine chamber 302 to the upstream end.

[0121] The second shielding plate 312 is disposed from the frame 23 on the left-hand Y1 side to the second side 22. The second shielding plate 312 is disposed at the same height as the first shielding plate 311 in the third-hand Z direction. The second shielding plate 312 is plate-shaped, and its main surface is formed to be perpendicular to the third-hand Z direction. The second shielding plate 312 is formed along the first direction X from the downstream end of the machine room 302 to the upstream end.

[0122] According to the above structure, the air flowing in from the vent 310 through the suction device 6 moves towards the first side 221 instead of downwards due to the presence of the second shielding plate 312. Figure 9In the diagram, the airflow is indicated by arrow E. At this time, since the air passes over the upper surface of the workpiece W (the surface on the side of the laser head 3), dust and fumes generated from the upper surface of the workpiece W are captured by the airflow and move with the air. The air towards the first side 221 flows along the rectifier plate 313 towards the bottom surface 25. The air towards the bottom surface 25 passes between the rectifier plate 313 and the frame 23 on the right-hand Y2 side, and is drawn in through the collection port 351.

[0123] In this way, by the flow of air flowing in from the vent 310 provided on the second side 22, dust and soot generated from the upper surface of the workpiece W can be captured from the collection port 251.

[0124] [Industry Applicability]

[0125] The laser cutting apparatus disclosed herein has the effect of moving the dust generated by cutting outside the machine room, corresponding to high-speed cutting, and can be used in laser cutting production lines, etc.

[0126] Explanation of reference numerals in the attached figures

[0127] 1: Laser cutting device

[0128] 2: Machine Room

[0129] 3: Laser head

[0130] 4: Capture Department

[0131] 5: Collection hopper

[0132] 6: Suction device

[0133] 41: Box Section

[0134] 42: Airflow generation unit

[0135] 436: First Opening

[0136] 441: Open end

Claims

1. A laser cutting device, wherein, have: The machine room uses lasers to cut workpieces; A laser head capable of moving in a first direction parallel to the conveying direction of the workpiece and in a second direction orthogonal to the first direction; The collecting section, which can move together with the laser head in the first direction, collects dust generated during cutting. A collection hopper, which is disposed on the first side of the machine room, is used to collect the dust; A suction unit, connected to the collecting hopper, sucks up the dust that moves from the collecting unit to the collecting hopper. The collecting hopper has a collecting port formed on the first side of the machine chamber. The trapping unit has: The box section, which is opposite to the laser head, has an opening end having a first opening along the second direction and a second opening toward the collecting hopper; A first airflow generating unit generates airflow toward the opening end within the box section.

2. The laser cutting device as described in claim 1, wherein, The first airflow generating unit has an air blowing nozzle.

3. The laser cutting device as described in claim 1, wherein, It also has: A separating plate, configured in the collecting hopper, separates the end material from the dust moving from the second opening; The end material recovery unit removes the end material separated by the separation plate from the collection unit.

4. The laser cutting device as described in claim 1, wherein, The collection port has a first region capable of being inserted into the opening end and a second region disposed above the first region. The laser cutting device also has: A second airflow generating unit is disposed on the second side of the chamber opposite to the first side, and generates an airflow toward the second region above the collecting unit; An airflow adjustment unit, located in the second area, adjusts the airflow generated by the second airflow generating unit.

5. The laser cutting apparatus as described in claim 1, wherein, The laser cutting device also includes a vent, which is disposed above the workpiece and on the first side or on the second side of the machine chamber opposite to the first side. This vent allows outside air to enter. The collecting hopper has a collecting port formed on the first side of the machine chamber. The suction of the suction unit generates an airflow that passes through the upper surface of the workpiece from the vent and toward the collection port.

6. The laser cutting apparatus according to any one of claims 1 to 5, wherein, The laser cutting device also has: A cover is disposed around the laser emission portion of the laser head; A pipe that connects the cover and the box section.

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