JPH0957482A - Handy torch for yag laser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure safety of an operator and also to improve workability by preventing the reflected light and the scattered light of a YAG laser beam from scattering around the operator. SOLUTION: A handy torch 1 is provided with a protective cover 17 which covers a work WA, WB to be machined and the tip end of a handy torch 1. The protective cover 17 is constituted of an attaching base 19 to which the handy torch 1 is attached and a first and a second protective member 21, 23 which are rotatably adjustable against the attaching base 19. In addition, the handy torch is provided with plural protective covers 17 corresponding to the shape of the work WA, WB to be machined; a first sensor 31, 33 which conform if each protective cover 17 is freely replaceable against the handy torch 1 and if the protective cover 17 is in contact with the work WA, WB; and a second sensor 9 which checks the focal position of a laser beam.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a YAG laser handy torch that an operator holds in his hand.

[0002]

2. Description of the Related Art Conventionally, when a work such as cutting or welding is performed using a YAG laser handy torch,
An operator holds the handy part of the handy torch by hand and turns the torch tip of the handy torch toward the work.

[0003]

When the work is irradiated with the YAG laser beam emitted from the YAG laser handy torch, the reflected light may be scattered around the operator. There is a problem in that the worker is not sure about safety because only protection such as protective glasses is provided to prevent the scattering of the reflected light.

An object of the present invention is to prevent the reflected light and the scattered light of the YAG laser beam from scattering around the worker so as to ensure the safety of the worker and improve the workability of the YAG laser handy torch. To provide.

[0005]

In order to achieve the above object, a handy torch for a YAG laser according to a first aspect of the present invention comprises a work to be machined and a protective cover covering the tip of the handy torch. It is characterized by being provided on the torch.

In the above construction, since the work to be machined and the torch tip of the handy torch are covered with the protective cover provided on the YAG laser handy torch, the reflected light and the scattered light generated during the work are handled by the operator. It is not scattered and it is safe and the workability is improved.

A YAG laser handy torch according to a second aspect of the present invention is the YAG laser handy torch of the first aspect, wherein the protective cover has a mounting base to which the handy torch is mounted, and the rotation is adjustable with respect to the mounting base. The first and second protective members are included.

In the above structure, the first and second protective members of the protective cover are rotationally adjusted with respect to the mounting base according to the shape of the workpiece to be machined, so that the first and second protective members become the workpiece to be machined. By adjusting the abutting force, the focus position is adjusted to the machining position of the work.

According to a third aspect of the present invention, there is provided a YAG laser handy torch according to the first aspect, wherein the YAG laser handy torch is provided with a plurality of protective covers according to the shape of the workpiece to be machined. It is characterized in that it is detachably attached.

In the above structure, since the protective cover is attached to the handy torch in an exchangeable manner, the protective cover is exchanged and used depending on the shape of the workpiece to be machined.

A YAG laser handy torch according to a fourth aspect of the present invention is the YAG laser handy torch according to the first, second and third aspects, further comprising a first sensor for confirming whether or not the protective cover contacts the work. It is characterized by

In the above structure, the first sensor provided on the protective cover confirms that the work and the tip of the handy torch are covered with the protective cover, and then the shutter is opened for laser processing for the first time. So it's safer.

A YAG laser handy torch according to a fifth aspect of the present invention is the YAG laser handy torch of the first, second, third and fourth aspects, wherein the handy torch is provided with a second sensor for confirming the focal position of the laser beam. It is characterized by

The YAG laser handy torch of the present invention according to claim 6 is the YAG laser handy torch according to claim 5, wherein the second sensor is a CCD camera.

According to the fifth and sixth aspects of the invention, the second
It is easy to confirm that the focus position of the laser beam is at the processing position of the work by the CCD camera which is the sensor.

[0016]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, a YAG laser handy torch 1 comprises a cylindrical torch body 3 and a handy 5 integrated with the torch body 3.
A condenser lens 7 is provided in the torch body 3. A CCD camera 9 as a second sensor and a monitor 11 are provided above the outer periphery of the torch body 3. Further, a manual button is provided on a part of the handy device 5. This manual button 13
By turning on, a shutter provided in an oscillator (not shown) is opened. The torch body 3 is connected by an optical fiber 15 to a laser oscillator (not shown).

On the tip side of the torch body 3, there is a protective cover 1 covering the work and the tip portion of the torch body 3 for processing.
7 are provided. The protective cover 17 includes a mounting base portion 19 to which the torch body 3 is attached, and protective members 21 and 23 provided at one end of the mounting base portion 19.

Moreover, the side protection members 25 and 27 are integrated on the left and right sides of the protection members 21 and 23, and the elongated holes 25H and 25H are formed at the same positions of the side protection members 25 and 27.
27H is formed. Pins 29 are provided in the long holes 25H and 27H. In the case of the example of the present embodiment, the attachment base portion 19, the first and second protection members 21, 2 are
3 and the side protection members 25 and 27 are made of the same material and are integrated with each other to have elasticity. First sensors 31 and 33 are provided at a part of the tip end portions of the first protection members 21 and 23, respectively.
It is confirmed whether the work 1 and the works W _A and W _B are electrically connected to each other.

With the above structure, when laser welding is performed on the abutting portion where the works W _A and W _B are abutted, first, the first and second protective members 21 and 2 of the protective cover 17 are first formed.
Match 3 to workpieces W _A and W _B , respectively. This matching is confirmed by the first sensors 31 and 33 for continuity. Next, since the first and second protection members 21 and 23 are made of an elastic body, they are rotated and adjusted with respect to the mounting base 19 according to the force of abutting against the works W _A and W _B. This state is displayed on the monitor 11 via the CCD camera 9,
The focus position irradiated from the condenser lens 7 is the work W _A ,
Confirmation of whether or not there was the processing position of the W _B is performed.

Therefore, by the first sensors 31, 33,
When the conduction confirmation between the first and second protection members 21 and 23 and the works W _A and W _B and the confirmation that the focus position matches the processing position by the CCD camera 9 are sounded by a buzzer,
When the manual button 13 is turned on, the shutter opens. As a result, after the laser beam is condensed by the condenser lens 7 via the optical fiber 15, it is irradiated to the processing positions of the works W _A and W _B to perform laser welding.

In this way, laser welding can be carried out by covering the processing positions of the works W _A and W _B and the tip of the torch body 3 with the first and second protective members 21 and 23 of the protective cover 17. Therefore, the reflected light and scattered light of the laser beam are prevented from scattering to the worker by the first and second protection members 21 and 23 and the side protection members 25 and 27, and the worker is protected safely. It is possible to improve workability.

The works W _A , W _B and the first and second protection members 2
Since the conduction of Nos. 1 and 23 can be confirmed by the first sensors 31 and 33, it is confirmed that the protective cover 17 covers the machining positions of the works W _A and W _B.

Further, with the CCD camera 9, it is possible to easily confirm whether or not the focal position of the laser beam is aligned with the processing positions of the works W _A and W _B.

Since the first and second protection members 21 and 23 can be rotationally adjusted with respect to the mounting base 19, it is possible to deal with the shapes of the works W _A and W _B , and at the same time, to focus the work. It is easy to match the position with the processing position.

FIG. 2 shows an example of another embodiment instead of FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals, and the description of the overlapping parts will be omitted. That is, in FIG. 2, the mounting base 19 and the first and the first
The second protection members 21 and 23 are rotatably provided, for example, by a hinge 35. In addition, the side protection members 25 and 27 are connected by the spring 37, and the force of the spring 37 connects the side member 2 to the side member 2.
5 and 27 are tightened.

Therefore, the angles of the first and second protection members 21 and 23 can be automatically adjusted according to the shapes of the works W _A and W _B. The other operations and effects are the same as those described with reference to FIG.

FIGS. 3A, 3B and 3C show an example of another embodiment of the protective cover 17. FIG.
In (A), (B), and (C), the same parts as those in FIG. 1 are designated by the same reference numerals and different points will be described. That is, in FIGS. 3A, 3B, and 3C, the first and second protective members 21 and 23 of the protective cover 17 are integrally fixed to the mounting base 19.

In FIG. 3A, the angle between the first and second protective members 21 and 23 is 90 °, and in FIG. 3B, the angle between the first and second protective members 21 and 23 is an acute angle. And the case where the angles of the first and second protection members 21 and 23 are obtuse angles are shown in FIG. Then, as shown in FIG.
The protective covers 17 of (B) and (C) are prepared in advance and provided so as to be replaceably attached to and detached from the torch body 3 according to the shapes of the works W _A and W _B , that is, the butting state. In this case, the focus position is the work W _A , W _B
It is set in advance so as to coincide with the machining position which is the butt position. Therefore, it is not necessary to make an adjustment for adjusting the focal position to the processing position.

FIGS. 4A, 4B and 5A,
An example of another embodiment of the protective cover 17 is shown in (B) and (C). 4A and 4B, the protective member 39 of the protective cover 17 has a hollow cylindrical shape, and the upper end of the protective member 39 is provided on the torch body 3 via a plurality of springs 41. There is.

Therefore, the protective member 39 is the torch body 3
It is provided so as to be rotatable by a certain angle with respect to, and is provided so as to be slightly movable to the left in FIG. 4 (A). Further, a plurality of contact sensors 43 as first sensors are attached on the circumference of the lower end of the protection member 39 at appropriate intervals.

With the above structure, as shown in FIG. 4A, when the holding member 39 is lowered with the works W _A and W _B abutting each other, the contact sensor 43 causes the holding member 39 to move.
After it is confirmed that the workpiece has contacted the works W _A and W _B , laser welding can be performed in the same manner as in FIG.

Moreover, the protective member 39 is the torch body 3
It is provided to be detachable. This protection member 39 is shown in FIG.
As shown in (A), (B), and (C), various shapes are prepared in advance and stored in a magazine (not shown), so that corner joints with the works W _A and W _B (outer side) ), Plane butt, and laser welding to the corner joint (inside) can be easily performed.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes. The mounting base portion 19 of the protective cover 17, the first and second protective members 21 and 23, and the side protective member 2 in the example of the present embodiment.
The material of 5, 27 is preferably metal, but may be a transparent member such as glass or plastic that absorbs the YAG laser.

[0035]

As will be understood from the above-described embodiments, according to the invention of claim 1, the torch for the work and the handy torch to be processed by the protective cover provided on the YAG laser handy torch. Since the tip portion is covered, the reflected light and scattered light generated during processing are not scattered to the operator, which is safe and the workability can be improved.

According to the second aspect of the present invention, the first and second protective members of the protective cover are rotationally adjusted with respect to the mounting base depending on the shape of the work to be machined, so that the first and second protective members are provided. The focus position can be easily adjusted to the processing position of the work by adjusting the force of pressing against the work to be processed.

According to the third aspect of the present invention, since the protective cover is replaceably attached to the handy torch, the protective cover can be exchanged and used according to the shape of the workpiece to be machined.

According to the invention of claim 4, after it is confirmed by the first sensor provided in the protective cover that the workpiece and the tip of the handy torch are covered with the protective cover, the shutter is opened and the laser processing is performed for the first time. It will be done so it is very safe.

According to the fifth and sixth aspects of the present invention, it is possible to easily confirm that the focus position of the laser beam is at the processing position of the workpiece by the CCD camera which is the second sensor.

[Brief description of drawings]

FIG. 1 is a YAG of an example of an embodiment for carrying out the present invention.
It is a perspective view of the handy torch for lasers.

FIG. 2 is a perspective view of another YAG laser handy torch which is an alternative to FIG.

3A, 3B, and 3C are perspective views showing another example of a protective cover.

FIG. 4A is a front view showing another example of the protective cover,
(B) is a bottom view of (A).

5 (A), (B), and (C) are views showing various protective covers used in various butted states of works.

[Explanation of symbols]

 1 Handy torch for YAG laser 3 Torch body 5 Handy 7 Condenser lens 9 CCD camera (second sensor) 11 Monitor 13 Manual button 15 Optical fiber 17 Protective cover 19 Mounting base 21, 23 First and second protective member 25, 27 Side Protective member 31, 33 Second sensor

Claims (6)

[Claims] 1. A handy torch for a YAG laser, wherein a protective cover covering a work to be processed and a tip of the handy torch is provided on the handy torch. 2. The protective cover is composed of a mounting base for mounting a handy torch, and first and second protective members whose rotation is adjustable with respect to the mounting base. Handy torch for YAG laser described. 3. The YAG laser according to claim 1, wherein a plurality of protective covers corresponding to the shape of the workpiece to be machined are provided, and each protective cover is attached to the handy torch in a replaceable manner. Handy torch. 4. The YAG laser handy torch according to claim 1, further comprising a first sensor for confirming whether or not the protective cover contacts the work. 5. A handy torch for a YAG laser according to claim 1, wherein the handy torch is provided with a second sensor for confirming a focus position of a laser beam. 6. The handy torch for a YAG laser according to claim 5, wherein the second sensor is a CCD camera.