JP3469969B2 - Handy torch for YAG laser - Google Patents

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 points the torch tip of the handy torch toward the work.

When the work is irradiated with the YAG laser beam emitted from the YAG laser handy torch, the reflected light and the scattered light may be scattered around the operator. In order to protect the operator from the reflected light and the scattered light, as is known in, for example, Japanese Utility Model Laid-Open No. 61-172681 and Japanese Utility Model Laid-Open No. 2-270891, exhaust is provided to the tip of the laser processing head. There is a food hood to deal with it.

[0004]

By the way, the above-mentioned conventional exhaust hood has, for example, a cylindrical shape, has a flat tip portion, and can be moved in the vertical direction by a coil spring or the like. When the butting angles of the works are 180 degrees, or when the butt welding is performed in a state where the radius of curvature is very large, the work can be covered with the exhaust hood, but other butting shapes cause a gap. However, there is a problem that it cannot be protected from reflected light and scattered light.

An object of the present invention is to provide, for example, a YAG laser handy torch which is compatible with all a variety of butt shapes and has no leakage of the laser beam.

[0006]

SUMMARY OF THE INVENTION The present invention is as described above.
It was made in consideration of the conventional problems, so that the operator can hold
Laser bee inside the main body of the handy torch.
A condenser lens for condensing
The laser beam focused by the laser beam toward the workpiece
The main body of the handy torch with the nozzle
A handy torch for the YAG laser that is prepared for the body.
The tip end presses the work piece on the circumference of the nozzle.
A plurality of guard members are installed in close contact with each other, and
The nozzle members can be individually moved in the axial direction of the nozzle body.
And the guard members are normally provided by pressing members.
It is configured to be pressed outwardly.

Therefore, for example, no matter what kind of butt shape of the work, the front end of the work is covered with the guard member so that no gap is generated, so that there is no leakage of reflected light and scattered light, and the operator Be protected safely.

The present invention is also directed to the above-mentioned YAG laser handle.
In the detorch, each of the guard members is the nozzle
Multiple layers are provided at appropriate intervals in the radial direction of the body.

Therefore, since the plurality of guard members are multiply provided in the radial direction of the handy torch at appropriate intervals, the sealing property is further improved, and leakage of reflected light and scattered light is almost completely prevented. Be done.

The present invention is also directed to the above-mentioned YAG laser handle.
In the detorch, place it away from the nozzle.
To emit a laser beam to the handy torch body
An emission on switch for

Therefore, since the emission on-switch is provided on the handy torch, the laser beam is not emitted unless the emission on-switch is turned on, so that the processing is performed after confirming the safety.

The present invention is also directed to the above-mentioned YAG laser handle.
In the detorch, the nozzle and the emission on switch are
The machining point can be set between the
It is equipped with an observation window for observation.

Therefore, since the processing point is easily observed from the observation window through the reflection mirror to bring the processing point to the focal position before turning on the emission on-switch, the emission on-switch is turned on to perform the processing. , Good processing is done.

[0014]

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 is provided with a hollow cylindrical handy torch body 3, and in this handy torch body 3, supporting members 5 and 7 are provided. They are mounted at appropriate intervals in the axial direction. A hollow cylindrical member 9 is mounted on the support member 5, and a collimating lens 11 and a condenser lens 13 are mounted on the hollow cylindrical member portion 9 from above at appropriate intervals. An emission ON switch 15 is provided on the left side of the hollow cylindrical member 9 in FIG. 1 through the support member 5.

A transparent observation window 17 made of glass or the like is provided between the support member 5 and the support member 7 on the right side in FIG. A reflection mirror 21 is provided on the support block 19 mounted on the left side of FIG.

A nozzle main body 23 having a stepped hole inside is integrally formed at a lower portion of the support member 7. A nose 25 is detachably attached to the lower end of the axial center of the nozzle body 23 with a screw. A hollow cylindrical nozzle cover 27 is provided at the lower end of the nozzle body 23.

The nozzle body 23 and the nozzle cover 2
In the radial direction of 7 as well, referring also to FIG.
9 and 31 are attached in close contact with each other on the circumference in a radial pattern and vertically extended. Moreover, each of the guard pins 2
For example, springs 33 and 35 as pressing members are always provided in the nozzle body 23 to which 9 and 31 are attached while being urged downward in FIG.

[0019] With the above structure, with the workpiece W _A and W _B, as shown in Figure 1, in a state of abutting an inclined to butt angle theta, the hand operator Handy torch body 3 When welding the abutting portion with each other, a plurality of closely-contacted guard pins 29 and 31 on the circumference are attached to the workpiece.
When abutting on the inclined surface, it moves individually upward against the biasing force of the springs 33 and 35, and the tips of the guard pins 29 and 31 form a gap corresponding to the inclined surfaces of the works W _A and W _B. It is in a pressed state.

In this state, a laser oscillator (not shown),
When the emission on switch 15 is turned on through the optical fiber, the laser beam passes through the collimator lens 11 and is condensed on the condenser lens 13. The laser beam condensed by the condenser lens 13 is emitted toward the nozzle 25 work W _A, to W _B, the laser welding is easily row by being irradiated to the butted portion of the workpiece W _A and W _B Will be seen.

Therefore, the butt angle θ of W _A and W _B
Accordingly, since the guard pins 29, 31 are moved in the vertical direction in FIG. 1 against the urging force of the springs 33, 35 to perform the laser welding while pressing the works W _A , W _B without any gap, Reflected light and scattered light at the time of welding are shielded by a plurality of closely-contacted guard pins 29 and 31, so that they are not leaked to the outside, so that the worker can be protected safely and the work can be performed with peace of mind. Since it is performed, it is possible to improve work efficiency.

Further, since the laser beam is not emitted unless the emission on switch 15 is turned on, the worker can prepare for the work with peace of mind. Moreover, since the processing point can be observed from the observation window 17 through the reflection mirror 21 before turning on the emission ON switch 15, it can be easily confirmed whether or not the processing point coincides with the butted portion.
Highly accurate processing can be performed.

The present invention is not limited to the examples of the embodiments described above, but can be implemented in other modes by making appropriate changes. As the pressing member, the springs 33 and 35 are described as an example, but a fluid such as urethane rubber or assist gas pressure may be used. Although the guard pins 29 and 31 have been described as examples of the guard member, the shape thereof is not limited to a round shape, and may be a rod shape or a wire brush.

[0024]

As will be understood from the above-described embodiments, according to the invention of claim 1, no matter what kind of butt shape of the work, for example, the tip of the work is protected by the guard member. Since there is no gap by covering, reflected light,
There is no leakage of scattered light, and workers can be protected safely.

According to the second aspect of the present invention, since the plurality of guard members are multiply provided in the radial direction of the handy torch at appropriate intervals, the sealing property is further improved, and reflected light and scattered light are prevented. You can prevent leakage almost completely.

According to the third aspect of the present invention, since the emission on-switch is provided on the handy torch, the laser beam is not emitted unless the emission on-switch is turned on. it can.

According to the invention of claim 4, before turning on the emission ON switch, the processing point is easily observed from the observation window through the reflection mirror to adjust the processing point to the focal position, and then the emission ON switch is turned ON. Since the processing is performed in this manner, good processing can be performed.

[Brief description of drawings]

FIG. 1 shows an example Y of an embodiment for carrying out the present invention.
It is a front sectional view of a handy torch for AG laser.

FIG. 2 is a bottom view of FIG.

[Explanation of symbols]

1 Handy torch for YAG laser 3 Handy torch body 13 Condensing lens 15 Output ON switch 17 Observation window 21 reflective mirror 23 Nozzle body 25 nozzles 27 nozzle cover 29, 31 Guard pin (guard member) 33, 35 spring (pressing member)

─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP 62-6790 (JP, A) JP 5-318159 (JP, A) JP 1-23383 (JP, A) Actual development Sho 60- 11179 (JP, U) Actual development Sho 51-36534 (JP, U) Patent 176293 (JP, C2) (58) Fields investigated (Int.Cl. ⁷ , DB name) B23K 26/00-26/42 B23Q 11 / 00 F16P 1/06

Claims (4)

(57) [Claims] 1. A han for an operator to hold and operate.
In the detorch body (3), a laser beam focusing unit
An optical lens (13) is provided, and the condenser lens (1
The laser beam focused by 3) is emitted toward the work.
Front nozzle body (23) with a nozzle (25) to fire
YAG laser provided for the handy torch body (3)
Handheld torch for surrounding the nozzle (25)
Multiple guards whose tip is pressed against the work on the circumference
The materials (29) are provided in close contact with each other, and the guard members (2
9) individually moving in the axial direction of the nozzle body (23)
The guard member (29) can be freely installed and the pressing portion
The material (33) is always pressed outward.
Handy torch for YAG laser, which is characterized by 2. A handicap for a YAG laser according to claim 1.
In the torch, each of the guard members is the nozzle body.
(23) is provided with multiple layers at appropriate intervals in the radial direction.
Characteristic YAG laser handy torch. 3. A YAG laser according to claim 1 or 2.
In a handy torch, separate from the nozzle (25)
The handy torch body (3) in the closed position.
The emission on switch (15) for emitting the beam
A YAG laser handheld characterized by having
March. 4. A handicap for a YAG laser according to claim 3.
In the torch, the nozzle (25) and the emission on
Reflection mirror provided inside between switch (15)
Equipped with an observation window for observing processing points through (21)
Handyto for YAG laser
Ji.