JP6818069B2 - Welding surface and welding method - Google Patents

Description

The present invention relates to a welding surface used for various welding operations and a welding method using the welding surface.

When welding aluminum, stainless steel, and other various metals, the operator performs the work while visually checking the molten state and the like. Welded parts, which are the targets of welding work, emit harmful rays such as ultraviolet radiation, infrared radiation, and intense visible light that are harmful to the eyes. Therefore, in the welding work, a welding protective surface (hereinafter referred to as a welding surface) that protects the worker's eyes and protects the worker's face from the risk of trauma due to arc or spatter is used.

In the current welding work, it is difficult to confirm the degree of sufficient metal melting and heat entry. Therefore, the welding work often depends on the sense of the worker, and the quality of the finish changes depending on the skill level of the worker.

Conventionally, a technique for temperature control in welding has also been proposed. For example, Patent Document 1 discloses a thermometer for welding work for controlling the temperature between passes in welding over a plurality of passes. This thermometer is a case, a permanent magnet for attaching and detaching the case to and from the periphery of the weld, a sensor that detects infrared rays from the weld, and a display that displays the temperature calculated based on the output of the sensor. And a buzzer to let you know that the temperature has fallen below the preset temperature.

Japanese Unexamined Patent Publication No. 2001-208612

The above-mentioned thermometer for welding work is arranged around the welded portion, and may be difficult to see from the operator who wears the welded surface. That is, since the window portion of the welded surface is covered with a filter plate having a predetermined light-shielding property, the operator cannot visually recognize the displayed contents through the filter plate unless the brightness of the display is set sufficiently high. In addition, since the welded part moves gradually, the measurement range by the thermometer for welding work and the welded part may deviate from each other, and when the distance between the welded part and the display becomes large, the operator needs to confirm both. You need to move your vision frequently.

In addition to these, there are various problems in the conventional welding work. Therefore, one of the objects of the present invention is to provide a welding surface capable of supporting a welding operation and a welding method using the welding surface.

The welded surface according to one embodiment covers a face piece for covering the face of a welding operator, a window portion provided on the face piece and having an opening, and at least a part of the opening, and emits harmful light rays generated during welding. It is provided with a filter plate for shielding, a sensor for detecting the temperature of the welded portion, and a display device having a screen provided on the window portion and displaying temperature information based on the detection result of the sensor on the screen. There is. In addition, the welding method according to one embodiment includes performing welding work while checking the temperature information displayed on the screen using the welding surface.

The screen may be arranged so as not to overlap with the filter plate when viewed from a welding operator who wears the face piece.

The aperture may include a visual field area visible to the outside through the filter plate. In this case, the screen and the field of view may be adjacent to each other. As an example, the screen and the field of view may be arranged one above the other as viewed from the operator who wears the welded surface. Further, the screen may have a polygonal shape in which at least two sides are in contact with the visual field region.

The sensor may be capable of detecting the temperature distribution of the welded portion. In this case, the temperature information displayed on the screen may include the temperature distribution corresponding to the visual field region.

The window portion has the opening, and holds the frame for holding the filter plate and the display device, the face body opening provided on the face body, and the frame for holding the face body opening so as to be openable and closable. A mechanism and may be provided.

According to the present invention, it is possible to provide a welding surface capable of supporting a welding operation and a welding method using the welding surface.

FIG. 1 is a schematic perspective view of a welded surface according to an embodiment, showing a state in which the frame of the window portion is lowered. FIG. 2 is a schematic perspective view of the welded surface according to the embodiment, showing a state in which the frame of the window portion is raised. FIG. 3 is a schematic cross-sectional view of the welded surface according to the embodiment. FIG. 4 is a diagram schematically showing an example of the field of view of a worker who performs welding work by mounting the welding surface according to the embodiment. FIG. 5 is a diagram showing other examples of the screen and the field of view. FIG. 6 is a diagram showing still another example of the screen and the visual field area.

An embodiment of the present invention will be described with reference to the drawings.
1 and 2 are schematic perspective views of a welded surface 100 according to the present embodiment. The welded surface 100 includes a face piece 1, a headgear 2, a window portion 3, a filter plate 4, a cover plate 5, a sensor 6, and a display device 7. The filter plate 4 and the cover plate 5 are overlapped with each other, and the cover plate 5 is located on the outside (the side shown in FIG. 1).

The face piece 1 is made of, for example, a flame-retardant material, and has a size capable of covering the face of an operator. The headgear 2 attaches the welded surface 100 to the worker's head. When the welded surface 100 is attached to the worker's head by the headgear 2, it is preferable that the face piece 1 does not touch the worker's face.

The window portion 3 is provided on the face piece 1 at a position corresponding to the eyes of an operator wearing the welded surface 100. The window portion 3 includes a face piece opening 1a (see FIG. 2) provided in the face piece 1, a base 10 attached to the outer surface of the face piece 1, a frame 20 for holding a filter plate 4 and a cover plate 5, and a frame 20. It is provided with a holding mechanism 30 for holding. For example, the base 10, the frame 20, and the holding mechanism 30 are made of a metal material and the surface is coated with an insulating material.

As shown in FIG. 2, the base 10 has a flange 11 and a protruding portion 12 protruding from the flange 11. The protruding portion 12 has a base opening 12a that overlaps with the opening 1a of the face piece 1.

The frame 20 has a frame opening 20a and holds the peripheral edges of the filter plate 4 and the cover plate 5. As shown in FIG. 1, the filter plate 4 and the cover plate 5 cover the entire frame opening 20a. It is preferable that the filter plate 4 and the cover plate 5 are removable from the frame 20. This facilitates replacement of the filter plate 4 and the cover plate 5.

The holding mechanism 30 includes one or more hinges 31 and an elastic body 32. The hinge 31 connects the upper edge portion of the frame 20 and the base 10 so that the frame 20 can rotate with respect to the base 10. The elastic body 32 is, for example, a coil spring, one end of which is connected to the side edge of the frame 20 and the other end of which is connected to the base 10.

According to the holding mechanism 30 having such a configuration, the face opening 1a and the base opening 12a can be opened and closed by the frame 20. In the state where the frame 20 is lowered as shown in FIG. 1, the frame 20 is urged toward the base 10 by the elastic body 32. Further, when the frame 20 is raised as shown in FIG. 2, the posture of the frame 20 is maintained in the raised state by the elastic body 32.

The filter plate 4 shields harmful rays such as ultraviolet radiation, infrared radiation and intense visible light that are harmful to the eyes. The term "shielding" here includes not only the case of completely blocking harmful light rays but also the case of weakening to the extent that it does not harm the eyes. The cover plate 5 is a transparent member that plays a role of preventing spatter, fume, and the like generated during welding from adhering to the filter plate 4 and damaging the filter plate 4.

In the examples of FIGS. 1 and 2, the frame 20 further holds the sensor 6 and the display device 7. The sensor 6 detects the temperature of the detection region facing the welded surface 100 through the small holes 21 provided near the upper edge of the frame 20. The small hole 21 is arranged above the horizontal center C of the frame opening 20a. In the present embodiment, it is assumed that the sensor 6 uses thermography that detects the temperature distribution in the detection region by infrared rays.

As shown in FIG. 2, the display device 7 has a screen 70 on which an image is displayed. The screen 70 faces the eyes of the operator with the frame 20 lowered. In the examples of FIGS. 1 and 2, the screen 70 covers the upper part of the frame opening 20a. The area of the frame opening 20a that is not covered by the screen 70 corresponds to the field of view area A that allows the operator to see the outside through the filter plate 4. From the viewpoint of ensuring a wide field of view, the area of the screen 70 covering the frame opening 20a is preferably smaller than the field of view area A.

As the display device 7, a liquid crystal display panel having a backlight or a flat panel type display device such as an organic electroluminescence display panel can be used, but the display device 7 is not limited to this example. The display device 7 may have a light-shielding property or a light-transmitting property. When the display device 7 has translucency, that is, when the background is visible through the screen 70, the field of view of the operator can be further widened.

The welded surface 100 may further include a battery 8 that supplies power to the sensor 6 and the display device 7, and a control device 9 that controls the sensor 6 and the display device 7. The battery 8 and the control device 9 may be arranged, for example, on the inner surface side of the face piece 1 or on the outer surface side. As another example, the sensor 6 and the display device 7 may be connected to an external power supply and control device via a cable.

FIG. 3 is a schematic cross-sectional view of the welded surface 100 along the horizontal center C. As shown in this figure, when the frame 20 is lowered, the face piece opening 1a, the base opening 12a, and the frame opening 20a overlap.

The sensor 6 is fixed to, for example, the inner surface of the frame 20. The display device 7 is fixed to the frame 20 at positions not shown in FIG. 3, for example, at both ends in the horizontal direction. The display device 7 is located closer to the worker W on which the welding surface 100 is attached than the filter plate 4. In the display device 7, at least a part of the back surface on the opposite side of the screen 70 is covered with the filter plate 4 and the cover plate 5. As a result, the display device 7 is protected from arc, spatter, fume, and the like. As another example, at least one of the filter plate 4 and the cover plate 5 may be provided only in a region that does not overlap the display device 7.

In the present embodiment, since the base 10 of the window portion 3 includes the protruding portion 12, a sufficient distance can be secured between the eyes of the worker W and the screen 70. This makes it easier for the worker W's eyes to focus on the screen 70. Further, the external state visually recognized through the field of view area A and the screen 70 can easily enter the field of view of the operator W at the same time.

FIG. 4 is a diagram schematically showing an example of the field of view of a worker who wears the welding surface 100 and performs welding work. Here, as an example of welding work, TIG (Tungsten Inert Gas) welding in which an operator holds a welding torch T and a welding rod R by hand is assumed. However, the welded surface 100 can also be used for other types of welding operations such as shielded metal arc welding, MIG (Metal Inert Gas) welding, MAG (Metal Active Gas) welding, and carbon dioxide arc welding. Further, the welding surface 100 may be used for semi-automatic welding or self-shield welding.

With the frame 20 down, the operator can see the welded portion containing the molten pool P through the visual field area A. Since the visual field area A is covered by the filter plate 4, harmful light rays in the vicinity of the molten pool P are shielded.

Further, in the welding operation, the sensor 6 detects the temperature distribution of the portion corresponding to the visual field region A. The detected temperature distribution is displayed on the screen 70. This temperature distribution is represented by, for example, a gradation in which red indicates high temperature and blue indicates low temperature. In the example of FIG. 4, the high temperature distribution D corresponding to the vicinity of the molten pool P, which is high temperature, is displayed on the screen 70.

For example, the temperature distribution displayed on the screen 70 corresponds to a region visually recognized through the visual field region A. That is, the coordinates of the temperature distribution displayed on the screen 70 in the vertical direction (vertical direction in FIG. 4) correspond to the positions of the visual field area A in the vertical direction, and the coordinates of the temperature distribution in the horizontal direction (horizontal direction in FIG. 4) are Corresponds to the horizontal position of the viewing area A. In this case, the high temperature distribution D is displayed directly above the molten pool P.

By confirming the temperature distribution displayed on the screen 70, the operator can easily grasp the degree of melting and heat input of the metal. Therefore, even a less skilled worker can proceed with the work with high accuracy and improve the quality of the welded finish.

If the screen 70 is viewed through the filter plate 4, the brightness of the image may decrease, making it difficult to confirm the temperature distribution. On the other hand, in the present embodiment, since the screen 70 does not overlap with the filter plate 4 when viewed from the operator, the operator can visually recognize a high-quality image.

Since the screen 70 is adjacent to the visual field area A, the operator can check the temperature distribution displayed on the screen 70 and the actual work situation without moving the line of sight significantly. If the temperature distribution displayed on the screen 70 corresponds to the portion visually recognized through the visual field area A as described above, it is easy to grasp the correspondence relationship between the temperature distribution and the vicinity of the work area.

Further, in the present embodiment, since the welded surface 100 includes the sensor 6, the relationship between the detection region by the sensor 6 and the visual field region A is fixed. Therefore, when the operator wearing the welded surface 100 moves his / her head, the detection area of the sensor 6 also moves in the direction facing the face, so that the temperature distribution of the visual field area A is displayed on the screen 70 without requiring any special operation. It is possible.

Further, since the display device 7 is provided on the frame 20 of the window portion 3, when the frame 20 is raised as shown in FIG. 2, the operator's field of view is not blocked by the display device 7. Therefore, the operator can visually recognize a wide range when the frame 20 is raised to prepare for welding or the like.

As described above, according to the present embodiment, the welding surface 100 capable of suitably supporting the welding work can be realized. Further, by using this welding surface 100, an efficient and highly accurate welding method can be realized. Welding with the welded surface 100 can be applied to manual or semi-manual welding operations in various fields such as aerospace, automobiles, railroads, ships, or construction.

The above embodiments do not limit the scope of the present invention to the configurations disclosed in each embodiment. The present invention can be implemented by modifying the configuration disclosed in the above embodiment into various aspects.

The relationship between the screen 70 and the visual field area A is not limited to that illustrated in FIG. For example, as shown in FIG. 5, the screen 70 may be located below the visual field area A. In addition, the screen 70 may be located to the left or right of the visual field area A.

Further, as shown in FIG. 6, three sides of the rectangular screen 70 may be in contact with the visual field area A. In this case, the extended portion EX of the visual field area A is formed on the left and right sides of the screen 70. Therefore, the operator can visually recognize a wider range through the filter plate 4. In addition to the example of FIG. 5, the screen 70 may be formed in a polygonal shape other than a rectangle, and two or more sides thereof may be in contact with the visual field region A.

The welded surface 100 may have a grip extending downward, for example, from the face piece 1 instead of the headgear 2. In this case, the operator can hold the grip by hand and place the welded surface 100 in front of the face. Further, the welded surface 100 may be in the shape of a helmet that the operator wears on the head. The structure of the window portion 3 can be deformed in various ways depending on the shape of the welded surface 100 and the like.

The sensor 6 may be arranged separately from the welded surface 100. In this case, if the sensor 6 and the welding surface 100 are connected by wire or wireless communication, the temperature information detected by the sensor 6 can be displayed on the screen 70 of the welding surface 100.

The display device 7 may be arranged outside the filter plate 4. Even in this case, for example, if the brightness of the display device 7 is sufficiently increased, the image of the screen 70 can be visually recognized by the operator.

The temperature information displayed on the screen 70 is not limited to the temperature distribution. For example, the temperature information may be a numerical value representing the temperature of the specific position detected by the sensor 6, the average value of the temperature of the specific region, the maximum value of the temperature of the specific region, or the like. Further, the temperature information may include a target temperature according to the metal to be welded, a difference between the target temperature and the temperature detected by the sensor 6, and the like.

100 ... welded surface, 1 ... facet, 2 ... headgear, 3 ... window, 4 ... filter plate, 5 ... cover plate, 6 ... sensor, 7 ... display device, 8 ... battery, 9 ... control device, 10 ... base, 20 ... frame, 30 ... holding mechanism, 70 ... screen, A ... field of view area.

Claims (8)

A face to cover the face of the welder,
A window portion provided on the face piece and having a frame opening,
A filter plate that covers at least a part of the frame opening and shields harmful rays generated during welding.
A sensor that detects the temperature of the weld and
A display device having a screen provided on the window and displaying a temperature distribution based on the detection result of the sensor on the screen.
Equipped with a,
The window is
A frame having the frame opening and holding the filter plate and the display device,
With the face body opening provided in the face body,
A holding mechanism that holds the frame so that the face opening can be opened and closed,
With
The frame opening includes a field area visible to the outside through the filter plate.
The screen and the field of view are adjacent to each other and
The display device is a welded surface that displays the temperature distribution corresponding to the region visually recognized through the visual field region on the screen . The screen does not overlap with the filter plate when viewed from the welder wearing the facet.
The welded surface according to claim 1. The area covered by the screen over the frame opening is smaller than the viewing area.
The welded surface according to claim 1 or 2. The screen and the field of view are arranged one above the other as viewed from the operator who wears the welded surface.
The welded surface according to any one of claims 1 to 3 . The screen has a polygonal shape in which at least two sides are in contact with the visual field area.
The welded surface according to any one of claims 1 to 3 . The vertical coordinates of the temperature distribution displayed on the screen correspond to the vertical position of the visual field region, and the horizontal coordinates of the temperature distribution correspond to the horizontal position of the visual field region.
The welded surface according to claim 4. A cover plate overlaid on the filter plate is further provided.
The filter plate is located between the display device and the cover plate.
The welded surface according to any one of claims 1 to 6. A welding method in which a welding operation is performed while checking the temperature distribution displayed on the screen using the welding surface according to any one of claims 1 to 7.

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