Welding mask

Abstract

To provide a welding mask which can display a trajectory of a welding rod while appropriately shielding light.SOLUTION: A welding mask 10 includes a display part 1, a light-shielding part 2, a detection part 3, and a control part 4. The display part 1 displays a trajectory of a welding rod 6a, and the light-shielding part 2 is mounted on a window 5a of a welding mask body 5. The detection part 3 detects a welding start according to the magnitude of welding current. When the detection part 3 detects the welding start, the control part 4 allows the light-shielding part 2 to shield light.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a welding mask.

Background Art

[0002] The inventors have developed a processing trajectory display system disclosed in Patent Document 1. The processing trajectory display system calculates the tip position from the coordinate information of the welding rod and the distance to the tip, and displays the trajectory of the tip of the welding rod.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors have conceived a welding mask with a light-shielding portion that displays the trajectory of the welding rod. Specifically, this welding mask with a light-shielding portion includes a head-mounted display type mixed reality wearable computer that can be worn by a welding operator, and a welding mask that can be worn over it. Thereby, the trajectory of the welding rod can be displayed to the welding operator during welding work.

[0005] The inventors have discovered the following problems. The light-shielding portion detects infrared rays and the like generated by welding and shields the light. On the other hand, when such a wearable computer is equipped with an infrared camera, the infrared camera emits infrared rays. The welding mask with a light-shielding portion may detect the infrared rays emitted by the infrared camera and cause the light-shielding portion to block light before the start of welding and after the end of welding. That is, there is a possibility that appropriate light shielding cannot be achieved.

[0006] In addition, infrared cameras, sensors, etc. equipped in such wearable computers may not be able to exhibit their necessary functions when covered by a welding surface with a light-shielding part. On the other hand, when the infrared cameras, sensors, etc. are exposed outside the welding surface with the light-shielding part, they may be affected by heat and gas from welding. Therefore, there is a possibility that the trajectory of the welding rod cannot be displayed.

[0007] The present disclosure has been made in view of the above-described problems, and provides a welding mask capable of displaying the trajectory of a welding rod while appropriately shielding light.

Means for Solving the Problems

[0008] The welding mask according to the present disclosure is a welding mask including a display unit, a light-shielding unit, a detection unit, and a control unit, the display unit displays the trajectory of a welding rod, the light-shielding unit is attached to a window of the welding mask body, the detection unit detects the start of welding according to the magnitude of the welding current, when the detection unit detects the start of welding, the control unit causes the light-shielding unit to shield light.

[0009] In the above-described welding mask, the detection unit detects the stop of welding according to the magnitude of the welding current, when the detection unit detects the stop of welding, the control unit may stop the light shielding of the light-shielding unit.

Effects of the Invention

[0010] According to the present disclosure, the trajectory of the welding rod can be displayed while appropriately shielding light.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0012] Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments. Also, for clarity of explanation, the following description and drawings are simplified as appropriate.

[0013] <Embodiment 1> Embodiment 1 will be described with reference to FIG. 1.

[0014] As shown in FIG. 1, the welding mask 10 includes a display unit 1, a light-shielding unit 2, a detection unit 3, a control unit 4, and a welding mask body 5.

[0015] The welding mask body 5 preferably has a shape adapted to the head of the welder who wears the welding mask 10. The welder can perform welding while operating the welding rod 6a and the welding torch 6 while wearing the welding mask 10. The welding torch 6 can be used, for example, in TIG welding, plasma welding, covered arc welding, MIG welding, MAG welding, etc. The welding rod 6a is preferably gripped by the welding torch 6 and receives the supply of welding current from the welding torch 6. The coordinate information acquisition device 6b is preferably fixedly provided on the welding torch 6. By using such a coordinate information acquisition device 6b, the orientation and movement position of the welding torch 6 can be measured.

[0016] The display unit 1 is provided inside the welding mask body 5. The display unit 1 displays the trajectory of the welding rod 6a. The display unit 1 is preferably a head-mounted display type mixed reality wearable computer that can be worn by a welding operator. The mixed reality wearable computer may be a commercially available product. Also, the display unit 1 does not require an infrared camera. The display unit 1 may display the trajectory based on the position information of the welding rod 6a using application software. The display unit 1 may acquire the position information of the welding rod 6a calculated by an information processing device (not shown). The information processing device may calculate the position information of the welding rod 6a by acquiring the position information of the welding torch 6 by the coordinate information acquisition device 6b. The coordinate information acquisition device 6b is preferably a simple motion capture device, for example, capable of measuring the position (X, Y, Z) and orientation (Roll, Pitch, Yaw) of six degrees of freedom. The coordinate information acquisition device 6b may measure the position and orientation of the welding torch 6 at regular time intervals, for example.

[0017] The light-shielding part 2 is attached to the window 5a of the welding mask body 5. When the light-shielding part 2 shields light, it suppresses light from passing through the window 5a from the outside of the welding mask body 5 and entering the inside of the welding mask body 5. The light-shielding part 2 preferably shields light so that the intensity of the light entering the inside of the welding mask body 5 is desirable for the welding operator. The light-shielding part 2 may start or stop light shielding in response to a command from the control part 4. The light-shielding part 2 preferably shields light using a liquid crystal filter.

[0018] The detection unit 3 detects the start of welding according to the magnitude of the welding current. The detection unit 3 may also detect the stop of welding according to the magnitude of the welding current. An example of the detection unit 3 shown in FIG. 1 is mounted on the welding torch 6. The detection unit 3 may detect the ON or OFF of the welding current flowing through the welding rod 6a and transmit a signal indicating the ON or OFF of the welding current to the control unit 4. The detection unit 3 may include a sensor that detects the welding current flowing through the welding rod 6a and a device that determines the ON or OFF of the welding current based on the welding current.

[0019] When the detection unit 3 detects the start of welding, the control unit 4 causes the light-shielding unit 2 to perform light shielding. When the detection unit 3 detects the stop of welding, the control unit 4 stops the light shielding of the light-shielding unit 2. The control unit 4 is a widely used computer device. The control unit 4 includes a central processing unit, a memory, various interfaces, a communication module, a storage, etc. The storage stores various programs. The processor reads and executes the program loaded on the memory, and the processing and functions of the control unit 4 are provided.

[0020] <One operation example> Next, with reference to FIGS. 2 and 3, one operation example of the welding mask 10 will be described.

[0021] Start detecting the welding current (step ST1).

[0022] Subsequently, continue to detect the welding current until the welding current reaches a predetermined value (step ST2: NO). The predetermined value is preferably the current value flowing through the welding rod 6a when welding is performed using the welding rod 6a, and may be obtained by calculation or experiment. The welding current WI, which is an example of the welding current shown in FIG. 3, is less than the predetermined value WI1 from the time point t0 to immediately before the time point t1.

[0023] Subsequently, when the welding current reaches the predetermined value, the control unit 4 causes the light-shielding unit 2 to perform light shielding (step ST2: YES, step ST3). The welding current WI shown in FIG. 3 is the predetermined value WI1 at the time point t1.

[0024] The control unit 4 continues the light shielding of the light-shielding unit 2 until the welding current becomes less than the predetermined value (step ST4: NO). The welding current WI shown in FIG. 3 is equal to or greater than the predetermined value WI1 from the time point t1 to the time point t2.

[0025] When the welding current falls below the predetermined value, the light shielding of the light-shielding unit 2 is stopped (step ST4: YES, step ST5). The welding current WI shown in FIG. 3 is less than the predetermined value WI1 after the time point t2.

[0026] Repeat the above steps ST2 to ST5 until the welding operation is completed (step ST6: NO). Finally, when the welding operation is completed, the operation of the welding mask 10 is also completed (step ST6: YES).

[0027] As described above, the welding mask 10 starts or stops the light shielding by the light shielding portion 2 according to the welding current. Therefore, when the display unit 1 includes an infrared camera, the welding mask 10 detects the infrared rays emitted by the infrared camera, and the light shielding portion 2 does not block light before the start of welding and after the end of welding. Therefore, the welding mask 10 can appropriately shield light.

[0028] In addition, the display unit 1 can display the trajectory of the welding rod without the need for an infrared camera or a sensor.

[0029] In addition, part or all of the processing in the above-described control unit 4 and information processing apparatus can be realized as a computer program. Such a program can be stored using various types of non-transitory computer-readable media and supplied to a computer. Non-transitory computer-readable media include various types of tangible recording media. Examples of non-transitory computer-readable media include magnetic recording media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (e.g., magneto-optical disks), CD-ROM (Read Only Memory), CD-R, CD-R / W, semiconductor memories (e.g., mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)). In addition, the program may be supplied to the computer by various types of transitory computer-readable media. Examples of transitory computer-readable media include electrical signals, optical signals, and electromagnetic waves. The transitory computer-readable media can supply the program to the computer via a wired communication path such as electric wires and optical fibers, or a wireless communication path.

[0030] Note that the present invention is not limited to the above-described embodiments and can be appropriately modified without departing from the spirit thereof. Further, the present invention may be implemented by appropriately combining the above-described embodiments and examples thereof.

Explanation of Reference Numerals

[0031] 10 Welding mask 1 Display unit 2 Light-shielding unit 3 Detection unit 4 Control unit 5 Welding mask body 5a Window 6 Welding torch 6a Welding rod 6b Coordinate information acquisition device

Claims

1. A welding mask comprising a display unit, a light-shielding unit, a detection unit, and a control unit, wherein the display unit displays the trajectory of the welding rod, the light-shielding unit is attached to the window of the welding mask body, the detection unit detects the start of welding according to the magnitude of the welding current, and when the detection unit detects the start of welding, the control unit causes the light-shielding unit to block light. Welding mask.

2. The detection unit detects the stop of welding according to the magnitude of the welding current, and when the detection unit detects the stop of welding, the control unit stops the light shielding of the light-shielding unit. The welding mask according to Claim 1.

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