JPH09295174A - Yag laser handy torch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a YAG laser laser handy torch which is superior in workability as well as sure visual observation on a machining part such as a welding line, regardless of the machining of a work, for example, butt welding or fillet welding. SOLUTION: Each of center axial line 1a and 2a of the torch body 1 and the torch head 2 is arranged to cross at a prescribed angle; and the torch head 2 is designed to be rotatable at a prescribed angle around the center axial line of the torch body, with an assembly of a CCD camera/LCD display installed on the outer side of the body 1.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a hand-held YAG.
The present invention relates to a handy torch as a laser processing device.

[0002]

2. Description of the Related Art A handy torch as a conventional hand-held YAG laser processing apparatus used, for example, for welding or cutting a plate work is generally called a so-called straight type as shown in FIG. Therefore, the axis of the nozzle of the processing torch and the axis of the optical fiber cable that guides the laser light are aligned.

In FIG. 5, reference numeral 21 denotes a laser processing torch body, which is a hand-held handle. Reference numeral 22 is a torch head portion having a work processing nozzle portion 23 for emitting a laser beam L, and 24 is a torch lead for guiding the laser beam to a torch main body portion 21 by an internal optical fiber from a laser beam source (not shown). The laser beam from the optical fiber is diffused into parallel rays by a collimator lens (not shown) which will be described later, and is condensed by a condenser lens to form a nozzle portion
It has a straight type optical system that emits more laser light L to perform processing.

[0004]

However, in the conventional straight type handy torch as described above, when the torch main body (handle portion) 21 is held by hand and pressurized, for example, a welded portion of a sheet metal work. In the case of "butt welding" in the open plane, there is no problem in the work, but especially in the case of "fillet welding" as shown in FIGS. 6 (a) and 6 (b), b) In the case of the example shown in the figure, since the torch is a straight type, the torch and work may interfere with each other and workability may deteriorate or become impossible. In addition, the welding line is difficult to see. In some cases, it was difficult to make the laser beam follow the welding line accurately.

The present invention has been made in view of the above situation, and has good workability in both butt welding and fillet welding of a workpiece, and particularly in the welding line of the workpiece during fillet welding. The purpose is to provide a YAG laser handy torch that can be easily confirmed.

[0006]

Therefore, according to the present invention, the central axis of the torch head for emitting the YAG laser light and the central axis of the torch body are arranged so as to intersect each other at a predetermined angle. Then, the torch head portion is configured to be rotatable around the central axis of the torch main body portion,
The CCD camera and the liquid crystal display are attached to the outside of the torch body to achieve the above object.

[0007]

The YAG laser according to the present invention as described above
The handy torch has good workability when gripping and processing the torch body by hand, for example, butt welding or fillet welding, and the rotating function of the head part and the visual recognition function of the welded part make it easy. It is possible to perform accurate processing.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.
This will be described in detail based on one embodiment.

[0009]

【Example】

(Structure) FIGS. 1 to 4 are explanatory views of an embodiment of a YAG laser handy torch according to the present invention. 1 is an external side view thereof, FIG. 2 is an internal cross-sectional side view thereof, FIG. 3 is an external front view thereof, and FIG. 4 is an internal sectional front view thereof.

1 to 4, 1 is a torch body,
It has a central axis 1a and a torch head 2 at one end thereof.
And a torch lead 4 accommodating an optical fiber cable at the other end. The torch head 2 has a central axis 2
The nozzle portion 3 having a is provided with a nozzle portion 3 which emits a laser beam L at its tip to perform processing.

The central axis 2a of the torch head portion 2 is arranged so as to intersect the central axis of the torch main body portion 1 at a predetermined angle (90 ° in the illustrated example), and the root portion of the head 2 is a feature of the present invention. As shown in FIG. 2, the torch body 1 is configured to be rotatable about a central axis 1a by a rotating portion 2c (± 60 ° in the illustrated example). It is fixed at an arbitrary angle by 6a. In the figure, 2b indicates a head cover.

As a second feature of the present invention, an assembly 5 of a CCD camera and a liquid crystal display (LCD) is provided on the mounting portion of the head 2 at one end of the torch body 1 with an axis 5a and an axis 5a, respectively. It is attached so as to be rotatable around a predetermined angle 5b.

The YAG laser beam is guided from a laser light source device (not shown) through the optical fiber in the torch lead 4 to the collimator lens 7 in the torch body 1 and diffused into parallel rays, as shown in FIG. Torch head part 2
The beam is deflected by the internal reflection mirror 8 and reaches the condenser lens 9, and the beam is refocused and emitted as the processing laser beam L from the nozzle portion 3 to be used for processing. In addition, 1 in the figure
Reference numeral 0 represents a signal line, and 11 represents an assist gas supply pipe.

(Operation) With the construction of this embodiment as described above, the torch head portion 2 of this handy torch is substantially L-shaped.
Since it has a shape, it is generally easy to operate, and it is easy to handle and handle, for example, the torch lead 4 by hand,
The burden on the operator is eased.

Further, since the torch head portion 2 can be rotated about the main body axis 1a by a predetermined angle, workability at a specific work position can be improved, and a welding line or the like, which is conventionally inconvenient to visually check, can be reliably displayed on the LCD. Since it is visible, accurate welding work is possible even in the case of fillet welding.

(Other Embodiments) The above embodiment shows a typical embodiment of the present invention, in which the angle of the torch head portion 2 with respect to the torch body portion 1 is 90 °, and the torch is The example in which the rotation angle of the head portion 2 is ± 60 ° is shown, but the above-mentioned angles are not limited to this.
Of course, the desired angle can be selected according to the purpose.

The rotating mechanism of the torch head portion 2 and the like can also adopt various modified designs.

[0018]

As described above, the torch head part of the handy torch for YAG laser processing is formed in a substantially L shape so as to have a predetermined angle with respect to the torch body part, and this head part is formed at the predetermined angle. Since it is configured to be rotatable and a CCD camera and its display are attached, operability and visibility are improved and more accurate workability can be obtained even when performing fillet welding of a work, for example. Became.

[Brief description of drawings]

FIG. 1 is an external side view of an embodiment.

FIG. 2 is a sectional side view of the embodiment.

FIG. 3 is an external front view of the embodiment.

FIG. 4 is a sectional front view of an example.

FIG. 5 is an external view of an example of a conventional handy torch.

[Fig. 6] Example of fillet welding diagram of work

[Explanation of symbols]

 1, 21 Torch main body (handle) 1a Central axis 2, 22 Torch head 2a Central axis 2b Head cover 2c Rotating part 3,23 Nozzle 4 Torch lead 5 CCD camera and LCD assembly 5a, 5b Rotation axis 6 Retaining Pin 6a Plunger 7 Collimator lens 8 Reflecting mirror 9 Condensing lens 10 Signal line 11 Assist gas supply pipe L Laser light

Claims (1)

[Claims] 1. A torch head part which emits YAG laser light is arranged so that a central axis line of the torch head part and a central axis line of the torch body part intersect at a predetermined angle.
A YAG laser handy torch characterized in that the YAG laser handy torch is configured to be rotatable about the central axis of the torch body, and a CCD camera and a liquid crystal display are attached to the outside of the torch body.