JP3859803B2 - Handy torch nozzle in laser processing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a handy torch nozzle in a laser processing machine, and more particularly to a handy torch nozzle in a laser processing machine used when moving along the surface of a workpiece.
[0002]
[Prior art]
As shown in FIG. 6, a handy torch HT in a laser beam machine conventionally condenses a laser beam LB sent from a laser oscillator (not shown) through an optical fiber 101 by a condenser lens 103. Thus, laser processing is performed by irradiating the workpiece W from the nozzle 105 attached to the tip of the handy torch HT. At this time, the nozzle 105 is brought into contact with the workpiece W and moved while sliding on the surface of the workpiece W to perform laser processing.
[0003]
In laser processing, the basic attitude is that the handy torch HT is perpendicular to the surface of the workpiece W. However, if the workpiece W is a highly reflective material such as aluminum or copper, it depends on the surface of the workpiece W. There is a possibility that expensive optical components such as the condensing lens 103 above the nozzle 105, the optical fiber 101, and a mirror in the oscillator (not shown) may be damaged by reflected light.
[0004]
Therefore, when the pen-type handy torch HT is operated as shown in FIG. 7, the laser processing is performed so that the reflected light from the surface of the workpiece W is not taken into the optical system by being slightly inclined. It is common to do.
[0005]
[Problems to be solved by the invention]
However, when the handy torch HT is used with a slight inclination as shown in FIG. 7, a gap 107 is formed between the surface of the workpiece W and the nozzle 105 as shown in FIG. Since reflected light or scattered light leaks from the gap 107, there is a problem in terms of ensuring safety.
[0006]
The object of the present invention is to provide a handy torch nozzle in a laser processing machine in which laser light does not leak even when the torch is tilted. is there.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the handy torch nozzle in the laser processing machine of the invention according to claim 1 is a handy in a laser processing machine for performing laser processing by irradiating a workpiece with laser light oscillated by a laser oscillator. A rotation support mechanism that supports the nozzle of the torch so that the nozzle does not move up and down at the tip of the handy torch , and is rotatable about the optical axis of the laser beam ; and at the tip of the nozzle A nozzle tip that is provided so as not to move up and down and to fall off, and is rotatable about a direction orthogonal to the optical axis and having a contact surface that contacts the workpiece at the tip. Is.
[0008]
Therefore, the laser beam oscillated by the laser oscillator is irradiated onto the work through the nozzle provided at the tip of the handy torch and the nozzle chip in contact with the surface of the work. At this time, when the handy torch is inclined with respect to the surface of the workpiece, the nozzle is rotated in the direction around the optical axis of the laser beam by the rotation support mechanism, and the nozzle tip is further rotated by the rotation support mechanism. Rotate in a direction perpendicular to the direction.
[0009]
According to a second aspect of the present invention, there is provided a handy torch nozzle in the laser processing machine according to the first aspect of the present invention, wherein the nozzle tip according to the first aspect includes a rotation receiving portion provided inside the tip of the nozzle and having a spherical lower half, and A spherical rotation support portion provided at the upper end portion of the nozzle tip to prevent the nozzle tip from dropping off and to prevent the nozzle tip from moving upward and dropping off and to support the rotation. A presser ring fixed inside the nozzle on the upper side of the nozzle tip to rotatably support the nozzle tip in a direction orthogonal to the direction of rotation by the mechanism, and is attached to the tip of the nozzle. To do.
[0010]
Accordingly, since the rotation support portion provided at the upper end portion of the nozzle tip is rotatably supported from the lower side by the rotation receiving portion provided at the tip of the nozzle, the nozzle tip does not drop downward. Further, since the nozzle tip is pressed from the upper side in a state of being freely rotatable in one direction by the presser ring, it does not fall off upward.
[0011]
The nozzle of the handy torch in the laser processing machine of the invention according to claim 3 is a nozzle of the handy torch in the laser processing machine for performing laser processing by irradiating the workpiece with the laser beam oscillated by a laser oscillator. The nozzle tip is provided so that it does not move up and down at the tip of the nozzle fixed to the tip of the torch and is rotatable in any direction and has a contact surface that contacts the workpiece at the tip. It is characterized by.
[0012]
Therefore, the laser beam oscillated by the laser oscillator is irradiated onto the work through the nozzle provided at the tip of the handy torch and the nozzle chip in contact with the surface of the work. At this time, when the handy torch is inclined with respect to the surface of the workpiece, the tip of the nozzle tip is in contact with the workpiece, and therefore rotates in an arbitrary direction with respect to the nozzle.
[0013]
According to a fourth aspect of the present invention, there is provided a handy torch nozzle in the laser processing machine according to the third aspect, wherein the nozzle tip according to the third aspect includes a rotation receiving portion having a spherical space provided inside the tip of the nozzle, and the rotation receiving portion. A spherical rotation support portion provided at the upper end portion of the nozzle tip so as to be rotatably supported, and is mounted on the tip portion of the nozzle so as not to move up and down and drop off. .
[0014]
Therefore, the nozzle tip is rotatable in an arbitrary direction without falling off vertically by the rotation receiving portion provided at the tip of the nozzle.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
1 and 2 show a nozzle 1 of a handy torch HT (see FIG. 4) in a laser beam machine according to the present invention. A groove 3 as a rotation support mechanism is provided on the outer peripheral surface of the upper end portion of the nozzle 1. In addition, a plurality of wheels 5 that are rotatable support mechanisms that are rotatable in the grooves 3 are provided on the inner surface of the lower end portion of the handy torch HT.
[0017]
Thus, the nozzle 1 for handy torch HT by a plurality of wheels 5, so as not to move up and down, it is and are rotatably mounted. Further, since the wheel 5 is fitted in the groove 3, the nozzle 1 does not fall off the handy torch HT.
[0018]
A nozzle tip 7 is attached to the tip of the nozzle 1. A space 9 for the optical axis of the laser beam is provided in the center of the nozzle chip 7 in the vertical direction, and a contact surface 11 for making a surface contact with the workpiece W is formed at the tip of the nozzle chip 7. Yes.
[0019]
A spherical rotation support portion 13 is provided on the upper portion of the nozzle chip 7, and a rotation receiving portion 15 having a lower surface formed in a spherical shape is provided on the lower end portion of the nozzle 1. The spherical lower portion of the rotation receiving portion 15 has a shape corresponding to the rotation support portion 13 of the nozzle tip 7 and prevents the nozzle tip 7 from falling off freely.
[0020]
Further, a snap ring 17 as a press ring is fixedly attached above the rotation receiving portion 15 in the nozzle 1, and a fulcrum ring 19 is provided below the snap ring 17. The fulcrum ring 19 includes a ring portion 21 having an overall ring shape, and a pair of fulcrum protrusions 23 provided diagonally to the center of the ring below the ring portion 21.
[0021]
The fulcrum ring 19 is pressed by the snap ring 17 so as not to be displaced upward. On the other hand, the upper end surface of the nozzle tip 7 has a planar shape, and is pressed from above at two points on the diagonal line by the pair of fulcrum protrusions 23 of the snap ring 17.
[0022]
Accordingly, the nozzle tip 7 is rotatably supported by the rotation receiving portion 15 of the nozzle 1 so as not to drop downward, and the tip of the fulcrum projection 23 is supported by the pair of fulcrum projections 23 while not falling upward. In FIG. 2, it is rotatable in the left-right direction. That is, the nozzle tip 7 so as not to move up and down to the tip of the nozzle 1, and in which are provided rotatably. In addition, since the whole nozzle 1 is rotatable with respect to the handy torch HT, the nozzle tip 7 is supported so as to be rotatable in all directions.
[0023]
From the above results, as shown in FIG. 3 and FIG. 4, the entire handy torch HT is inclined in an arbitrary direction with respect to the surface of the workpiece W with the nozzle tip 7 in contact with the surface of the workpiece W. As a result, the nozzle tip 7 always comes into contact with the surface of the workpiece W perpendicularly by the rotation of the nozzle 1 relative to the handy torch HT and the rotation of the nozzle tip 7 relative to the nozzle 1. Thereby, it can prevent that a laser beam leaks from the front-end | tip of the nozzle chip 7, and can improve safety | security.
[0024]
Further, since the nozzle tip 7 is very small, the operability of the handy torch HT is improved.
[0025]
The present invention is not limited to the above-described embodiment, and can be implemented in other modes by making appropriate modifications. That is, in the above-described embodiment, the fulcrum ring 19 is provided above the nozzle tip 7 to prevent the nozzle tip 7 from falling upward. However, like the nozzle 25 shown in FIG. The rotation receiving portion 27 provided at the lower end portion of the nozzle 25 is completely spherical (however, the optical axis of the laser beam is ensured), so that the nozzle tip 7 is not provided without providing the fulcrum ring 19 and the snap ring 17. May be prevented from moving up and down so as not to move up and down.
[0026]
【The invention's effect】
As described above, in the handy torch nozzle in the laser processing machine according to the first aspect of the present invention, the laser light oscillated by the laser oscillator comes into contact with the nozzle provided at the tip of the handy torch and the surface of the workpiece. The workpiece is irradiated through the nozzle tip. At this time, when the handy torch is inclined with respect to the surface of the workpiece, the nozzle is rotated in the direction around the optical axis of the laser beam by the rotation support mechanism, and the nozzle tip is further rotated by the rotation support mechanism. Since it rotates in the direction orthogonal to the direction, the tip surface of the nozzle tip is always in surface contact with the surface of the workpiece. For this reason, even when the handy torch is inclined, the laser light does not leak from the tip of the nozzle tip, so that the safety of work can be improved.
[0027]
In the handy torch nozzle in the laser beam machine according to the second aspect of the present invention, the rotation support portion provided at the upper end portion of the nozzle tip is rotatably supported from below by the rotation receiving portion provided at the tip end of the nozzle. As a result, the nozzle tip does not fall down. Further, since the nozzle tip is pressed from the upper side in a state of being freely rotatable in one direction by the presser ring, it does not fall off upward. For this reason, the tip surface of the nozzle tip can always come into surface contact with the surface of the workpiece.
[0028]
In the handy torch nozzle in the laser beam machine according to the third aspect of the present invention, the laser light oscillated by the laser oscillator passes through the nozzle provided at the tip of the handy torch and the nozzle tip in contact with the surface of the workpiece. The work is irradiated. At this time, if the handy torch is inclined with respect to the surface of the workpiece, the nozzle tip rotates in any direction with respect to the nozzle, so the tip surface of the nozzle tip is always in surface contact with the surface of the workpiece. Yes. For this reason, even when the handy torch is inclined, the laser light does not leak from the tip of the nozzle tip, so that the safety of work can be improved.
[0029]
In the nozzle of the handy torch in the laser beam machine according to the fourth aspect of the invention, the nozzle tip is rotatable in any direction without dropping up and down by the rotation receiving portion provided at the tip of the nozzle. For this reason, the tip surface of the nozzle tip can always come into surface contact with the surface of the workpiece.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a nozzle of a handy torch in a laser beam machine according to the present invention.
FIG. 2 is a cross-sectional view seen from the II-II direction in FIG.
FIG. 3 is a cross-sectional view showing a case where a nozzle is inclined with respect to a workpiece.
FIG. 4 is a cross-sectional view showing a case where a nozzle is inclined with respect to a workpiece.
FIG. 5 is a cross-sectional view showing another embodiment.
FIG. 6 is a front view showing a handy torch.
FIG. 7 is a front view showing a state where the handy torch is inclined with respect to the surface of the workpiece.
FIG. 8 is an enlarged view showing a state of the nozzle tip in FIG. 7;
[Explanation of symbols]
1, 25 Nozzle 7 Nozzle tip 11 Contact surface 13 Rotation support portion (Rotation support mechanism)
15, 27 Rotation receiving part (rotation support mechanism)
17 Snap ring (presser ring)
HT Handy Torch W Work LB Laser light

Claims (4)

A handy torch nozzle in a laser processing machine for performing laser processing by irradiating a laser beam oscillated by a laser oscillator so as to prevent the nozzle from moving up and down at the tip of the handy torch , and A rotation support mechanism that rotatably supports the optical axis of the laser light as a rotation center, and a vertical support and rotation mechanism provided so as not to move up and down at the tip of the nozzle and perpendicular to the optical axis. And a nozzle tip having an abutting surface that abuts against the workpiece at the tip, and a nozzle for a handy torch in a laser beam machine. The nozzle tip has a rotation receiving portion provided inside the tip of the nozzle, the lower half of which is spherical, and the rotation of the nozzle tip to prevent the nozzle tip from dropping downward and to be supported rotatably. In order to prevent the nozzle tip from moving upward and dropping off, and to support the nozzle tip rotatably in a direction perpendicular to the rotatable direction by the rotation support mechanism, and a spherical rotation support portion provided at the upper end. The nozzle of the handy torch in the laser processing machine according to claim 1, wherein the nozzle is attached to the tip of the nozzle by a press ring fixed inside the nozzle above the nozzle tip. A nozzle of a handy torch in a laser processing machine for performing laser processing by irradiating a workpiece with laser light oscillated by a laser oscillator, and moving up and down at the tip of the nozzle fixed to the tip of the handy torch A nozzle of a handy torch in a laser processing machine, comprising a nozzle tip that is provided so as not to rotate and is rotatable in an arbitrary direction and has a contact surface that contacts a workpiece at a tip. A rotation receiving portion having a spherical space provided inside the tip of the nozzle and a spherical rotation provided at the upper end portion of the nozzle tip to be rotatably supported by the rotation receiving portion. The nozzle of the handy torch in the laser beam machine according to claim 3, wherein the nozzle is mounted on the tip of the nozzle so as not to move up and down and fall off by a support portion.

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