JPH08150480A - Welding protection device and arc welding machine using the same - Google Patents

Abstract

(57) [Abstract] [Purpose] During welding, one hand is free to allow other auxiliary work, and the structure is simplified to facilitate manufacturing.
And reduce costs. A donut-shaped welding protection device 3 is sandwiched between a nozzle 9 and an insulating cylinder 7 to protect a welding operator from arc light and spatter during arc welding. Since this welding protection device 3 is attached to the welding torch 2,
It is not necessary for the welding operator to support the welding protection device 3. Further, since the welding protection device 3 has a simple structure, it can be manufactured more easily than a hand shield or the like, the number of parts is small, and the cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a welding protection device for protecting a welding operator from arc light and spatter and an arc welding machine using the same, and more specifically, to a welding torch. TECHNICAL FIELD The present invention relates to a welding protection device and an arc welding machine using the same.

[0002]

2. Description of the Related Art Conventionally, welding technology has been widely used in all industrial fields, one of which is the arc welding method. In this arc welding method, an arc is generated and the heat is used to melt the members for welding.
There are welding methods, MIG welding methods, CO ₂ semi-automatic welding methods, and the like.

By the way, in this arc welding method,
Intense arc light is generated, and molten metal and slag are scattered as high-temperature spatter. This arc light contains ultraviolet rays in addition to visible rays, and when the ultraviolet rays enter the eyes of humans, the conjunctiva, cornea, and the like are invaded, which sometimes leads to blindness. Further, when the skin is irradiated with ultraviolet rays, a burn phenomenon may occur. Further, spatter may cause burns.

Therefore, during arc welding, it is necessary to protect the welding operator from such arc light and spatter, and conventionally, a protection device for welding such as sunglasses, hand shields and helmets has been used. .

Each of the welding protection devices is provided with a semi-transparent light-shielding portion (protection portion), and an operator performs a welding operation by visually observing the welding portion through the light-shielding portion. Note that the transparency of this light-shielding portion is set to be quite low because it is necessary to shield the arc light, and therefore the confirmation of the welding line etc. before the arc occurs (specifically, the confirmation of the relative position between the welding torch and the welding line, ) Was usually performed by directly observing the welded portion without passing through the light shielding portion.

[0006]

However, the above-mentioned sunglasses have a problem that only the eyes are protected and the face is easily burned by arc light or spatter.

On the other hand, although there is no such problem in the hand shield and the helmet, in the case of the hand shield, it is necessary to have the hand shield and the welding torch in both hands, and there is a problem that other work cannot be performed during welding. It was
For example, a member to be welded (hereinafter referred to as "workpiece")
Is usually positioned by a jig, but in temporary welding, etc., this positioning may be done by the operator himself, not the jig, but when using the hand shield, both hands are blocked. However, such positioning has been difficult or impossible.

Further, in the case of a helmet, there are problems that the neck is tired due to the weight of the helmet, the head becomes damp, and the putting on and taking off is troublesome.

Further, as described above, it is usual to confirm the welding line and the like before the arc is generated by directly observing the welded portion. However, in the case of a helmet or sunglasses, they are attached after the confirmation. However, there is a problem that the holding position of the welding torch is displaced during the mounting work. In addition, since both hands are closed in the above-described temporary welding, the mounting operation itself is difficult.

In view of the above, the present invention provides a welding torch for welding, which allows one hand to be free to perform other auxiliary work during welding, and which prevents neck fatigue and head stuffiness such as when using a helmet. The purpose is to provide a protection device. It is another object of the present invention to provide a welding protection device that simplifies welding work by eliminating the need for attaching and detaching work such as when using a helmet.

It is another object of the present invention to provide a welding protection device which has a simple structure, has a smaller number of parts than a helmet or the like, is easy to manufacture, and is inexpensive. .

Further, according to the present invention, by forming the protection portion and the mounting portion as separate parts, the welding protection device applicable to various welding torches can be applied only by exchanging the mounting portion according to the shape of the welding torch. It is intended to provide.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is used together with an arc welder (1) and protects a part (31, 31) for blocking light or spatter from the arc weld. A welding torch (2) of the arc welding machine (1) in a welding protection device (3, 10, 20) equipped with 11, 21) and protecting an operator from light and spatter during arc welding. And a protection part (3).
1, 11 and 21) are held upright from the welding torch (2) to block light and spatter from the arc weld. In this case, the protection portion (31) has a substantially disc shape, and the attachment portion (32)
It is preferable that the opening is formed in the protection portion (31) and is held by being fitted onto the welding torch (2). In addition, the protection unit (1
1) has a curved shape like a bowl, the attachment part (12) is an opening formed in the protection part (11), and is fitted onto the welding torch (2). May be held based on the above. Furthermore, the protection part (21) has a substantially disc shape and has a first opening (21a), and the attachment part (22) has a second opening (22a). And the mounting portion (22) has the protection portion (2) so that the first opening portion (21a) and the second opening portion (22a) are aligned with each other.
1) and is attached to the attachment portion (2)
2) may be held by being fitted onto the welding torch (2).

On the other hand, the arc welding machine (1) according to the present invention
Is one of the above-mentioned welding protection devices (3, 10, 2).
0) and a welding torch (2) for generating an arc.

[0015]

According to the above construction, when a welding operator holds the welding torch (2) in one hand and performs arc welding, arc light or spatter is generated from the arc welding portion. These arc lights and the like are blocked by the welding protection device (3, 10, 20) and do not reach the eyes or face of the worker.

The reference numerals in parentheses refer to the drawings, but do not limit the structure of the present invention.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

First, referring to FIG. 1, a first embodiment of the present invention will be described.
It will be described with reference to FIG.

As shown in FIG. 1, the arc welding machine 1 according to this embodiment comprises a welding torch 2 and a welding protection device 3 which is held upright from the welding torch 2. .

The welding torch 2 has a torch body 6 for supporting the switch lever 5. The torch body 6 is supplied with a shield gas such as an electrode wire W or CO ₂ gas from a device (not shown). It is being supplied. A substantially cylindrical insulating cylinder 7 is detachably attached to the tip of the torch body 6, and a male screw portion 7a is formed on the outer peripheral surface of the insulating cylinder 7 as shown in detail in FIG. Has been done. Further, a cylindrical nozzle 9 having a female screw portion 9a formed on the inner peripheral surface thereof is detachably screwed to the male screw portion 7a of the insulating cylinder 7. The insulating cylinder 7 ensures the insulating property of the nozzle 9, and the insulating cylinder 7 and the nozzle 9 can be replaced when they are consumed.

On the other hand, the welding protection device 3 has a substantially disc-shaped light shielding portion (protection portion) 31, as shown in detail in FIG. The light-shielding portion 31 is semitransparently formed of fireproof glass or the like having a predetermined color, and is configured to shield harmful components of the arc light and to prevent scattering of spatter. Further, in the substantially central portion of the welding protection device 3,
An opening 32 as a mounting portion is formed. The inner diameter of the opening 32 is set to be slightly larger than the outer diameter of the male screw portion 7a of the insulating cylinder 7, and the welding protection device 3 is fitted into the male screw portion 7a of the insulating cylinder 7 to form the insulating cylinder 7. It is configured to be sandwiched between it and the nozzle 9. Further, the welding protection device 3 is set to a size (outer diameter) such that the angle θ (hereinafter referred to as “light-shielding angle θ”) shown in FIG. It is installed. Here, the angle θ is an angle at which the arc light is shielded by the welding protection device 3, and specifically, a virtual line l ₁ connecting the arc light generation point and the upper edge of the welding protection device 3. The angle formed by an imaginary line l ₂ connecting the arc light generation point and the lower edge of the welding protection device 3.

Next, the operation of this embodiment will be described with reference to FIG.

Now, when the welding operator holds the welding torch 2 in one hand and turns on the switch lever 5, the electrode wire W and the shield gas are discharged from the tip of the nozzle 9, and an arc is generated. At this time, strong arc light or spatter is generated, but these are blocked by the welding protection device 3 and do not reach the eyes or face of the worker.

Next, the effect of this embodiment will be described.

According to the present embodiment, the welding operator is protected from arc light and spatter by the welding protection device 3, so that the welding operator is not affected by visual angle obstruction such as conjunctivitis or burns.

Further, according to this embodiment, since the welding protection device 3 is configured to be attached to the welding torch 2, it is not necessary to support it by hand like a hand shield,
One hand is free. Therefore, other work can be performed even during welding, and for example, the worker himself / herself can easily hold and position the object to be welded, and can easily perform tack welding of the object to be welded.

Furthermore, since it is not necessary to attach a welding protection device to the head unlike a helmet, the neck is not tired and the head does not get damp.

Further, since it is not necessary to attach it to the body like a helmet or sunglasses, it is possible to simplify the welding work by eliminating the work of attaching and detaching it. For example, the operator can directly visually check the welded portion without interposing the light shielding portion 31 by merely shifting the head, and it becomes easy to confirm the holding position of the workpiece or the welding position before the arc occurs. Furthermore, when welding is started after these visual confirmations, it is only necessary to return the head to the original position, and it is not necessary to reattach the helmet or sunglasses to the body. Don't worry.

Furthermore, since the welding protection device 3 is made of refractory glass or the like, it is difficult to wear it even if spatter or the like adheres to it, and since it is detachable, it must be replaced. Is possible. further,
Since the light shielding portion 31 is semi-transparent, it is possible to perform welding while checking the arc welded portion, and it is possible to perform proper welding.

Further, since the welding protection device 3 is arranged in the vicinity of the arc light generation point, it can be of a small size in spite of achieving a wide range of light shielding. Therefore, the welding torch 2 does not become heavy, Welding workability is less likely to be hindered. Further, since the welding protection device 3 is arranged in the vicinity of the arc light generation point, it is easy to visually recognize the welding line and the like, and proper welding can be performed.

Further, according to this embodiment, since the welding protection device 3 has a simple structure in which the opening 32 is formed, the number of parts is smaller than that of the hand shield and the helmet, and the manufacturing is easy. It will be cheaper. Furthermore, this opening 3
By changing the size of 2, it can be easily attached to other welding torches and has excellent versatility.

Next, a second embodiment of the present invention will be described with reference to FIG.

The welding protection device 10 according to this embodiment has a light-shielding portion (protection portion) 11 which is curved like a bowl and forms a recess 11a. The light-shielding portion 11 is semitransparently formed of fireproof glass or the like having a predetermined color.
In addition, an opening 12 as a mounting portion is formed in the center of the welding protection device 10.
Is attached so that the concave portion 11a faces the welded portion side.

The inside diameter of the opening 12 is set to be slightly larger than the outside diameter of the welding torch (specifically, the outside diameter of the male screw portion 7a of the insulating cylinder 7), and the welding protection device 10 has a larger diameter. The method of attachment to the welding torch is the same as in the first embodiment described above. Also, the mounting position and size are set so that the light shielding angle θ of the welding protection device 10 is about 60 degrees, which is also the same as in the first embodiment.

Next, the effect of this embodiment will be described.

According to this embodiment, since the light shielding portion 11 is curved, the spatter from the welded portion hits the recess 11a and falls downward.

Also, in this embodiment, the same effect as that of the first embodiment can be obtained. That is, the welding operator is not hindered by the visual angle or burns, can perform other work even during welding, and does not have the neck tired or the head stuffed like when using a helmet. Further, the welding work can be simplified by eliminating the attachment / detachment work when using the helmet, and proper welding can be easily realized. Furthermore, the light-shielding portion 11 has little wear due to sputtering, and even if it is worn, it can be replaced.
It also enables welding while checking the arc welded part,
Appropriate welding is possible. Furthermore, the welding torch 2 does not become heavy, and the welding workability is less likely to be hindered. Further, since the welding protection device 10 is arranged near the arc light generation point,
This makes it easier to see the welding line, etc., and enables proper welding. Further, the welding protection device 10 is easier to manufacture, cheaper, and more versatile than a hand shield or the like.

Next, a third embodiment of the present invention will be described with reference to FIG.

The welding protection device 20 according to the present embodiment has a light shielding plate (protection portion) 21 having a substantially disc shape, and an opening portion (first opening) is formed at a substantially central portion of the light shielding plate 21. Part 21a is formed. Here, the inner diameter of the opening 21a is
It is set to be slightly larger than the outer diameter of the male screw portion 7a of the welding torch 2. Further, the light shielding plate 21 is formed semitransparently from a refractory glass or the like having a predetermined color, as in the above embodiment.

On the other hand, an adapter device 22 as a mounting portion is attached to the light shielding plate 21. The adapter device 22 has an opening portion (second opening portion) 22a having a diameter smaller than that of the opening portion 21a, and has a donut shape.
The openings 22a are fixed by screws 23 so that they coincide with the openings 21a on the side of the light shield plate. The inner diameter of the opening 22a of the adapter device 22 is set to be slightly larger than the outer diameter of the welding torch 2 (specifically, the male screw portion 7a of the insulating cylinder 7), so that the welding protection device 20 is connected to the insulating cylinder. 7 is fitted in the male screw portion 7a of the insulating cylinder 7 and the nozzle 9
It is configured to be sandwiched between and. The adapter device 22 is made of an insulating material or another material.

The mounting position and size of the welding protection device 20 are set so that the light-shielding angle θ of the welding protection device 20 is about 60 degrees, as in the first embodiment.

Next, the effect of this embodiment will be described.

According to this embodiment, the adapter device 22 is
Since it is a separate component that is detachably attached to the light shield plate 21, it can be applied to welding torches of various sizes by changing the adapter device 22 to have different opening diameters. Further, the adapter device 22 can be made thin by using a material having high strength. As a result, even if the light-shielding plate 21 is thick, the gap between the insulating cylinder 7 and the nozzle 9 can be set within a predetermined value, and the projection length of the nozzle 9 can be set appropriately for optimum welding. And

Also, in this embodiment, the same effect as that of the first embodiment can be obtained. That is, the welding operator is not hindered by the visual angle or burns, can perform other work even during welding, and does not have the neck tired or the head stuffed like when using a helmet. Further, the welding work can be simplified by eliminating the attachment / detachment work when using the helmet, and proper welding can be easily realized. Furthermore, the light-shielding plate 21 has little wear due to sputtering, and even if it wears out, it can be replaced.
It also enables welding while checking the arc welded part,
Appropriate welding is possible. Furthermore, the welding torch 2 does not become heavy, and the welding workability is less likely to be hindered. Further, since the welding protection device 20 is arranged near the arc light generation point,
This makes it easier to see the welding line, etc., and enables proper welding. Further, the welding protection device 20 is easier to manufacture, cheaper, and more versatile than a hand shield or the like.

In each of the above-mentioned embodiments, the outer shape of the welding protection device 3, ... Is circular. However, it is not limited to this, and it is possible to use a triangle, a quadrangle, a pentagon, a hexagon, an octagon. It may be a polygonal shape such as, or may be an elliptical shape. Also, other shapes may be used.

Further, although the above-mentioned respective embodiments have been described by taking a consumable electrode type arc welding machine (for example, a CO ₂ semi-automatic welding machine or a MIG welding machine) as an example, the invention is not limited to this, of course, and TIG welding. It may be applied to a non-consumable electrode type arc welding machine such as a welding machine.

By the way, although not particularly mentioned in each of the above-mentioned embodiments, a liquid crystal panel may be provided in the protection portion so that arc light is blocked by the liquid crystal panel. Less than,
Briefly explained.

In this case, by controlling the halftone of the liquid crystal panel, the transmittance can be easily optimized and optimum welding can be performed. Also, by switching the liquid crystal by turning the switch lever 5 on and off, the transparency is 100% before welding and the welding line can be visually observed. It is also possible to shut off. In this case, needless to say, a fireproof transparent member should be provided between the liquid crystal panel and the arc welded portion to block spatter.

[0049]

As described above, according to the present invention,
Since the welding worker is protected from the arc light and the spatter by the protective portion, the welding worker is not affected by the visual angle obstruction such as conjunctivitis and the burn.

Also in accordance with the present invention, the welding protection device is configured to be attached to a welding torch. Therefore, unlike the hand shield, it is not necessary to support it by hand, one hand is free, and other work can be performed during welding. For example, it becomes possible to easily carry out temporary welding of the object to be welded by holding the object to be welded by the operator himself. Further, since it is not necessary to attach a welding protection device to the head like a helmet, the neck does not get tired and the head does not get damp.

Further, since it is not necessary to attach it to the body like a helmet or sunglasses, it is possible to simplify the welding work by eliminating the attachment / detachment work. For example, an operator can visually check the welded portion directly without moving the protective portion by merely shifting the head, and it becomes easy to confirm the holding position of the object to be welded and the welding position before the arc occurs. Furthermore, when welding is started after these visual confirmations, it is only necessary to return the head to its original position and it is not necessary to reattach a helmet, sunglasses, etc. to the body. Nor.

Further, when an opening is formed in the welding protection device and the welding protection device is attached to the welding torch using the opening, the welding protection device has a simple structure, and a hand shield or a helmet is used. Compared with the above, the number of parts is small and the manufacturing is easy and the cost is low. Furthermore, by changing the size of this opening, it can be easily attached to another welding torch and is excellent in versatility.

[Brief description of drawings]

FIG. 1 is a view for explaining a main part of an arc welding machine according to a first embodiment of the present invention.

FIG. 2 is a view for explaining a method of attaching and detaching the welding protection device according to the first embodiment.

FIG. 3 is a view for explaining the detailed structure of the welding protection device according to the first embodiment.

FIG. 4 is a view for explaining a state of welding work.

FIG. 5 is a view for explaining the detailed structure of the welding protection device according to the second embodiment of the present invention.

FIG. 6 is a view for explaining the detailed structure of the welding protection device according to the third embodiment of the present invention.

[Explanation of symbols]

 1 Arc Welding Machine 2 Welding Torch 3 Welding Protective Device 7 Insulation Cylinder 9 Nozzle 10 Welding Protective Device 11 Light-shielding Part (Protection Part) 12 Opening (Mounting Part) 20 Welding Protective Device 21 Light-Shielding Plate (Protection Part) 21a Opening Part (first opening) 22 Adapter device 22 (mounting part) 22a Opening part (second opening) 31 Light-shielding part (protecting part) 32 Opening part (mounting part)

Claims (5)

[Claims] 1. A welding protection device for use with an arc welding machine, comprising a protection part for blocking light and spatter from the arc welding part, and protecting an operator from the light and spatter during arc welding. ,, comprising a mounting portion for mounting on a welding torch of the arc welding machine, and, the protection portion is held in a state of being erected from the welding torch, to block light and spatter from the arc welding portion, A welding protection device characterized by the above. 2. The protective portion has a substantially disc shape, and the mounting portion is an opening formed in the protective portion,
The welding protection device according to claim 1, wherein the welding protection device is held by being fitted onto the welding torch. 3. The protective portion is curved like a bowl, and the mounting portion is an opening formed in the protective portion,
The welding protection device according to claim 1, wherein the welding protection device is held by being fitted onto the welding torch. 4. The protective portion is a plate-shaped member having a substantially circular plate shape and a first opening, and the mounting portion is a plate-shaped member having a second opening. And the attachment portion is attached to the protection portion so that the first opening and the second opening are aligned with each other,
The welding protection device according to claim 1, wherein the attachment portion is held by being fitted onto the welding torch. 5. An arc welding machine, comprising: the welding protection device according to claim 1; and a welding torch for generating an arc.