JP6179746B1 - Dust collection nozzle for laser processing - Google Patents

Abstract

A dust collection nozzle for laser processing capable of more effectively removing fumes and the like is provided. A dust collection nozzle 10 for laser processing includes a hollow dust collection nozzle body 11 for guiding fumes generated during processing. The dust collection nozzle body 11 is provided with a suction port 11A for sucking fumes and a discharge port 11B for discharging fumes. A coating curtain 16 made of a ball chain is provided outside the dust collection nozzle body 11 so as to correspond to the suction port 11A, and can cover the space between the suction port 11A and the object to be processed. . [Selection] Figure 1

Description

  The present invention relates to a dust collecting nozzle for laser processing for removing fumes and the like during laser processing.

  Conventionally, laser processing has been widely used for cutting, welding, fine processing, or marking of various materials. In such laser processing, a large amount of fumes is generated during processing. For this reason, for example, when marking a workpiece such as a barcode, there has been a problem that the laser beam is blocked by the generated fumes and cannot be clearly marked. In addition, fume adheres to the lens surface of the laser processing machine, and there is also a problem that a stable engraved state cannot be reproduced on the laser processing machine side. Thus, although the suction nozzle removes the fumes, it is difficult to remove the fumes simply by bringing the suction nozzle close to the irradiation position of the laser beam, and improvement has been demanded.

  Therefore, the applicant of the present application is equipped with a hollow dust collecting nozzle body provided with a dust collecting portion on one end side and a discharge portion on the other end side, and the inside from the other end side to the one end side is disposed below the dust suction portion. An extension part that is inclined to extend downward is provided, a processing position opening that exposes the processing position of the object to be processed is provided below the extension part, and dust suction auxiliary air is supplied from one end of the dust collection part. In addition, a dust collecting nozzle for laser processing has been developed that is discharged from the other end side of the discharge portion (see Patent Document 1). According to the dust collecting nozzle for laser processing, since the processing position opening is provided in the extended part of the dust suction part, the processing position can be covered with the dust suction part and the dust suction auxiliary air is supplied from one end side of the dust suction part. And a fume can be easily discharged | emitted by attracting | sucking from the other end side of a discharge part.

Utility Model Registration No. 3195668

  However, the shape of the object to be processed varies, and depending on the surface shape of the object to be processed, for example, as shown in FIG. There was a case where it was possible. Therefore, even if suction is performed from the other end side of the discharge part, the fumes cannot be sufficiently sucked, and the blowing position of the dust suction auxiliary air is shifted from the processing position, so that the fumes can be sufficiently removed. There was a problem that it was not possible to obtain a sufficient effect.

  This invention is made | formed based on such a problem, and it aims at providing the dust collection nozzle for laser processing which can remove a fume etc. more effectively.

  The dust collector nozzle for laser processing of the present invention collects fumes generated during laser processing, and is a hollow dust collector provided with a suction port for sucking fumes and an exhaust port for discharging fumes. A nozzle body and a covering curtain made of a ball chain provided outside the dust collecting nozzle in correspondence with the suction port are provided.

  According to the dust collecting nozzle for laser processing of the present invention, the covering curtain made of a ball chain is provided on the outside of the dust collecting nozzle body so as to correspond to the suction port. Even if there is a gap between the suction port and the suction port of the dust collection nozzle body, the gap can be covered from the outside with the covering curtain. In particular, since the covering curtain is constituted by the ball chain, the ball chain is freely deformed along the shape of the workpiece, and the gap between the workpiece and the dust collecting nozzle body can be easily covered. Therefore, even if the shape of the workpiece is different, the fumes can be effectively sucked and removed. Therefore, it is possible to prevent the laser light from being blocked by the fume, and it is possible to perform a clear marking. Moreover, it can suppress that a fume adheres to the lens surface of a laser processing machine, and can reproduce the stable marking state.

  In addition, an air purge nozzle that blows auxiliary air to the processing position of the processing object, and an air purge nozzle that partly contacts the periphery of the processing position of the processing object and positions the air purge nozzle with respect to the processing object If a positioning member is provided, the air purge nozzle can be accurately placed at the machining position by bringing the air purge nozzle positioning member into contact with the periphery of the machining position where the shape variation due to the workpiece is extremely small. can do. Therefore, even if the shape of the workpiece is different, the auxiliary air can be accurately blown to the machining position, and the fumes can be easily removed.

  Furthermore, if the air purge nozzle positioning member has a pair of diffusion prevention walls provided so as to cover both sides in the direction of blowing the auxiliary air by the air purge nozzle corresponding to the processing position, the auxiliary air is blown. Therefore, it is possible to suppress the diffusion of the fumes and push the fumes to the discharge port side of the dust collection nozzle body with a high probability.

  In addition, if a covering curtain moving member that rotates and lifts the upper part of the covering curtain is provided, by placing the object to be processed in a state where the covering curtain is lifted to the outside and lowering the covering curtain, The covering curtain can be covered from above on the workpiece. Therefore, even if the shape of the workpiece is different, the gap between the workpiece and the dust collecting nozzle body can be easily covered.

It is sectional drawing showing the structure of the dust collection nozzle for laser processing which concerns on one embodiment of this invention. It is the figure which looked at the dust collection nozzle for laser processing shown in Drawing 1 from the I direction. It is the perspective view which looked at the dust collection nozzle for laser processing shown in FIG. 1 from the opposite side to I direction. It is the perspective view which looked at the dust collection nozzle for laser processing shown in FIG. 1 from the bottom. It is a figure showing the use condition of the dust collection nozzle for laser processing shown in FIG. It is a figure for demonstrating the problem of the conventional dust collection nozzle for laser processing.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a cross-sectional configuration of a dust collecting nozzle 10 for laser processing according to an embodiment of the present invention. FIG. 2 shows a configuration of the laser processing dust collecting nozzle 10 viewed from the I direction shown in FIG. FIG. 3 shows a perspective configuration of the laser processing dust collecting nozzle 10 viewed from the side opposite to the I direction shown in FIG. FIG. 4 illustrates a perspective configuration of the laser processing dust collection nozzle 10 as viewed from below. FIG. 5 shows a usage state of the dust collecting nozzle 10 for laser processing. This laser processing dust collection nozzle 10 collects fumes generated during laser processing and can be preferably used particularly in marking processing.

  The laser processing dust collection nozzle 10 includes a hollow dust collection nozzle body 11 that guides fumes generated during processing. The dust collection nozzle body 11 has a suction port 11A for sucking fumes and a discharge port 11B for discharging fumes. The suction port 11A is provided, for example, on the lower side of one end of the dust collection nozzle body 11 so as to expose the processing position of the processing object M. The discharge port 11B is provided at the other end of the dust collection nozzle body 11, for example.

  The dust collection nozzle body 11 also has a passage portion 11C that allows the laser light L to pass therethrough above one end portion. The passage portion 11C and the suction port 11A are provided at positions facing each other, so that the laser light L that has passed through the passage portion 11C is irradiated to the processing position of the workpiece M exposed by the suction port 11A. It has become. The passage portion 11C is preferably configured by an opening through which the laser light L passes. This is because the laser light L is not blocked by the attachment of fumes.

  On the lower side of the one end portion side of the dust collection nozzle body 11, it is preferable to provide an extension portion 11 </ b> D inclined from the other end portion toward the suction port 11 </ b> A and expanding the inside downward. This is because the processing position of the processing object M can be easily covered by the suction port 11A. In addition, it is preferable that the dust collection nozzle main body 11 is supported by the dust collection nozzle main body support member 12 so that it can move toward and away from the workpiece M, for example. Specifically, it is preferably supported so as to be movable in the vertical direction.

  The dust collecting nozzle 10 for laser processing also includes, for example, an air purge nozzle 13 that blows auxiliary air to the processing position of the processing object M, and an air purge nozzle positioning that positions the air purge nozzle 13 with respect to the processing object M. And a member 14. At least a part of each of the air purge nozzle 13 and the air purge nozzle positioning member 14 is, for example, from the air purge nozzle opening 11 </ b> F provided at the side of one end of the dust collection nozzle body 11 to the inside of the dust collection nozzle body 11. It is preferable that it is inserted in.

  For example, the air purge nozzle 13 is preferably arranged so as to be able to blow auxiliary air obliquely from above to the processing position of the processing object M, that is, the suction port 11A. The auxiliary air blowing angle is, for example, an angle from the vertical direction and is preferably in the range of 50 degrees to 70 degrees. This is because the fumes can be easily removed from the processing position.

  The air purge nozzle positioning member 14 is preferably configured to position the air purge nozzle 13 with respect to the workpiece M by, for example, partly contacting the periphery of the machining position of the workpiece M. . This is because the shape variation due to the workpiece M is extremely small around the machining position. The air purge nozzle positioning member 14 has a pair of diffusion prevention walls 14A provided so as to cover both sides of the auxiliary air blowing direction by the air purge nozzle 13 corresponding to the processing position, for example. It is preferable that the bottom portions of the pair of diffusion prevention walls 14A are positioned so as to abut on the periphery of the processing position. This is because the auxiliary air is blown to prevent the fumes from diffusing and push the fumes to the discharge port 11B side of the dust collection nozzle body 11.

  The air purge nozzle 13 and the air purge nozzle positioning member 14 can be moved so as to approach and separate from the workpiece M independently of the dust collection nozzle body 11 by, for example, the air purge nozzle support member 15. It is preferably supported. Specifically, it is preferably supported so as to be movable in the vertical direction. Thereby, it is preferable that the air purge nozzle 13 can be positioned with respect to the workpiece M independently of the dust collection nozzle body 11.

  The laser processing dust collection nozzle 10 further includes a covering curtain 16 made of a ball chain provided outside the dust collection nozzle body 11, for example, corresponding to the suction port 11 </ b> A. This is because the ball chain is freely deformed along the shape of the workpiece M, so that the gap between the workpiece M and the dust collection nozzle body 11 can be easily covered. The covering curtain 16 is preferably arranged by overlapping two or more ball chains. This is because the covering effect can be enhanced. The covering curtain 16 is preferably provided on both sides of the dust collecting nozzle body 11 so as to cover both sides of the auxiliary air blowing direction by the air purge nozzle 13 corresponding to the suction port 11A, for example.

  The upper part of the covering curtain 16 is supported by, for example, a covering curtain moving member 17. The covering curtain moving member 17 is preferably configured to be able to lift and rotate the upper part of the covering curtain 16 outward, for example. By disposing the workpiece M with the covering curtain 16 lifted outward and lowering the covering curtain 16 downward, the covering curtain 16 can be covered from above with respect to the workpiece M. This is because the space between M and the dust collection nozzle body 11 can be easily covered. 1 to 3 show a state where the covering curtain 16 is lowered, and FIG. 4 shows a state where the covering curtain 16 is lifted outward.

  This laser processing dust collection nozzle 10 can be used as follows, for example. First, for example, the workpiece M is placed at a predetermined position in a state where the covering curtain 16 is lifted outward. Next, for example, the dust collection nozzle body support member 12 moves the dust collection nozzle body 11 so as to approach the workpiece M, the processing position is covered with the suction port 11A, and the air purge nozzle support member 15 causes the air purge nozzle 13 to move. Then, the air purge nozzle positioning member 14 is moved so as to approach the workpiece M, and a part of the air purge nozzle positioning member 14 is brought into contact with the periphery of the processing position to position the air purge nozzle 13. Subsequently, for example, the covering curtain 16 is lowered to cover the suction port 11A from the outside.

  Next, for example, the processing position exposed by the suction port 11A is irradiated with the laser light L through the passage portion 11C. At that time, fumes generated during processing are sucked from the discharge port 11B, and auxiliary air is blown from the air purge nozzle 13 to the processing position. Thereby, the fumes generated during the processing are guided to the discharge port 11B together with the auxiliary air and discharged.

  The laser processing dust collecting nozzle 10 was used to perform marking processing with a laser beam as described above on a plurality of processing objects M having irregularities on the surface. At that time, the pressure of the dust collector was measured by the pressure sensor in each of the state where the covering curtain 16 was lifted outward and the state where the covering curtain 16 was lowered. The workpiece M has a 4.5 mm gap between the suction port 11A and the workpiece M (Test 1), a 3.3 mm gap (Test 2), and a 2.0 mm gap. What can be done (Test 3) was prepared. Each measurement was performed 10 times, and the average was calculated. The obtained results are shown in Table 1.

  As shown in Table 1, in Test 1, the pressure when the covering curtain 16 was lifted was 2.044 Kpa, and the pressure when the covering curtain 16 was lowered was 2.051 Kpa. In Test 2, the pressure when the covering curtain 16 was lifted was 2.043 Kpa, and the pressure when the covering curtain 16 was lowered was 2.050 Kpa. In Test 3, the pressure when the covering curtain 16 was lifted was 2.049 Kpa, and the pressure when the covering curtain 16 was lowered was 2.050 Kpa. In any case, a higher pressure was obtained when the covering curtain 16 was lowered. That is, it was found that the covering curtain 16 can cover the gap between the suction port 11A and the workpiece M, and can enhance the dust absorption effect.

  As described above, according to the present embodiment, the covering curtain 16 made of the ball chain is provided outside the dust collection nozzle body 11 so as to correspond to the suction port 11A. Even if there is a gap between the object M and the suction port 11 </ b> A of the dust collection nozzle body 11, the gap can be covered from the outside by the covering curtain 16. In particular, since the covering curtain 16 is constituted by a ball chain, the ball chain freely deforms along the shape of the workpiece M and easily covers between the workpiece M and the dust collection nozzle body 11. be able to. Therefore, even if the shape of the workpiece M is different, the fumes can be effectively sucked and removed. Therefore, it is possible to suppress the laser light L from being blocked by the fume, and it is possible to perform a clear marking. Moreover, it can suppress that a fume adheres to the lens surface of a laser processing machine, and can reproduce the stable marking state.

  Further, the air purge nozzle 13 that blows auxiliary air to the processing position of the processing object M and a part of the air purging nozzle 13 in contact with the periphery of the processing position of the processing object M position the positioning of the air purge nozzle 13 with respect to the processing object M. If the air purge nozzle positioning member 14 is provided, the air purge nozzle positioning member 14 is brought into contact with the periphery of the processing position where the variation of the shape due to the processing object M is extremely small. Thus, the air purge nozzle 13 can be accurately arranged. Therefore, even if the shape of the workpiece M is different, the auxiliary air can be accurately blown to the machining position, and the fumes can be easily removed.

  Further, if the air purge nozzle positioning member 14 has a pair of diffusion prevention walls 14A provided so as to cover both sides of the auxiliary air blowing direction by the air purge nozzle 13 corresponding to the processing position, the auxiliary By blowing air, it is possible to suppress the diffusion of fumes, and the fumes can be pushed out to the discharge port 11B side of the dust collection nozzle body 11 with high probability.

  In addition, if the covering curtain moving member 17 is provided to rotate the upper portion of the covering curtain 16 to the outside and lift it, the workpiece M is arranged with the covering curtain 16 lifted to the outside and the covering curtain 16 is lowered. The covering curtain 16 can be covered with the workpiece M from above by being lowered to the bottom. Therefore, even if the shape of the workpiece M is different, the gap between the workpiece M and the dust collection nozzle body 11 can be easily covered.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above embodiment, each component has been specifically described. However, not all the components may be provided, and other components may be provided.

  DESCRIPTION OF SYMBOLS 10 ... Dust collection nozzle for laser processing, 11 ... Dust collection nozzle body, 11A ... Suction port, 11B ... Discharge port, 11C ... Passing part, 11D ... Expansion part, 11F ... Opening for air purge nozzle, 12 ... Dust collection nozzle body Support member, 13 ... Air purge nozzle, 14 ... Air purge nozzle positioning member, 14A ... Diffusion prevention wall, 15 ... Air purge nozzle support member, 16 ... Cover curtain, 17 ... Cover curtain moving member, M ... Workpiece, L ... Laser light

Claims (4)

A dust collection nozzle for laser processing that collects fumes generated during laser processing,
A suction port for sucking fume, and a hollow dust collecting nozzle body provided with a discharge port for discharging fume;
A covering curtain made of a ball chain provided on the outside of the dust collection nozzle body corresponding to the suction port ;
An air purge nozzle for blowing auxiliary air to the processing position of the processing object;
A dust collection nozzle for laser processing , comprising: an air purge nozzle positioning member that partially contacts a processing position of a processing target and positions the air purge nozzle with respect to the processing target . The air purge nozzle positioning member machining position corresponding to, claim 1, wherein the having the air purge nozzle pair of diffusion preventing wall provided so as to cover both sides of blowing direction of the auxiliary air by Dust collecting nozzle for laser processing. A dust collection nozzle body support member that movably supports the dust collection nozzle body;
According to claim 1 or claim 2, wherein in that a air purge nozzle support member on which the supporting movably independently of the air purge nozzle and the air purge nozzle positioning member the dust collecting nozzle body Dust collecting nozzle for laser processing. The laser processing according to any one of claims 1 to 3 , further comprising a covering curtain moving member that supports the upper portion of the covering curtain and lifts the upper portion of the covering curtain by rotating it outward. Dust collection nozzle.