JP2021037538A - Welding condition monitoring device - Google Patents

Abstract

To provide a welding condition monitoring device having an exclusive welding light-shielding face having a complicated projection function while a welding light-shielding face indicating a welding current value and a welding voltage value on the welding light-shielding face is available in a market.SOLUTION: A welding condition monitoring device comprises: a welding current measurement instrument ID for measuring a welding current Iw; a welding voltage measurement instrument VD for measuring a welding voltage Vw; a transmitter 8 for transmitting the welding current value Id measured by the welding current measurement instrument ID, and the welding voltage value Vd measured by the welding voltage measurement instrument VD; a receiver 11 for receiving the welding current value Id and the welding voltage value Vd transmitted from the transmitter 8; and a transparent liquid crystal display 10 for indicating the welding current value Id and the welding voltage value Vd which are received by the receiver 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to a welding condition monitoring device.

Numerous inventions have been made for welding devices that display the welding current value and welding voltage value on the welding light-shielding surface. (For example, Patent Document 1) Further, an invention has been made in which the degree of shading of a welded light-shielding surface is changed according to a welding current value or a welding voltage value. (For example, Patent Document 2)

Japanese Patent Application Laid-Open No. 2013-504437 Japanese Unexamined Patent Publication No. 2014-113609

In order to display the welding current value and the welding voltage value on the welding light-shielding surface, a dedicated welding light-shielding surface having a complicated projection function is required.

An object of the present invention is to display a welding current value and a welding voltage value on a transmissive liquid crystal display that can be easily attached to a general-purpose hand-held welding light-shielding surface, thereby displaying a welding current value and a welding voltage value on the general-purpose hand-held welding light-shielding surface. Is to display.

In order to solve the above-mentioned problems, the invention of claim 1 is
Welding current measuring device that measures welding current and
Welding voltage measuring device that measures welding voltage and
A transmitter that transmits the welding current value measured by the welding current measuring device and the welding voltage value measured by the welding voltage measuring device, and
A receiver that receives the welding current value and welding voltage value transmitted from the transmitter, and
Provided with a transmissive liquid crystal display displaying the welding current value and welding voltage value received by the receiver.
It is a welding condition monitoring device characterized by.

The invention of claim 2 is
The transmissive liquid crystal display changes the transmittance in a predetermined range according to the welding current value received by the receiver.
The welding condition monitoring device according to claim 1.

According to the present invention, the welding current value and the welding voltage value can be easily displayed on the general-purpose hand-held welding light-shielding surface.

It is a connection diagram of the welding condition monitoring apparatus which concerns on embodiment of this invention, and is a block diagram of each function. It is a cross-sectional view of the center of the weld light-shielding surface, and is the figure which shows the inner structure. It is a figure which shows the display state of the transmissive liquid crystal display during welding.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Embodiment]
FIG. 1 is a connection diagram of a welding condition monitoring device according to an embodiment of the present invention and a block diagram of each function. Hereinafter, each block will be described with reference to the figure. The welding power supply PM is a consumable electrode type arc welding power supply. The welding wire 1 is fed into the welding torch 4 by the rotation of the feed roll 5 coupled to the feed motor WM, and an arc 3 is generated between the welding wire 1 and the base metal 2. The power feeding tip (not shown) in the welding torch 4 is connected to the positive side of the output terminal of the welding power supply PM by a power cable 7, and the welding voltage Vw of the welding power supply PM is applied to the base metal 2 for welding. The current Iw is energized. Shield gas (not shown) is ejected from the tip of the welding torch 4 to shut off the arc 3 from the atmosphere.

The welding current measuring device ID is connected between the negative side of the output terminal of the welding power supply PM and the base metal cable 6 connecting the base metal 2, detects the welding current Iw, and measures the welding current value Id.

The welding voltage measuring device VD detects the welding voltage Vw of the welding power source PM and measures the welding voltage value Vd.

The transmitter 8 wirelessly transmits the welding current value Id measured by the welding current measuring device ID and the welding voltage value Vd measured by the welding voltage measuring device VD to the receiver 11 built in the transmissive liquid crystal display 10.

The receiver 11 receives the welding current value Id and the welding voltage value Vd transmitted by the transmitter 8 and outputs them to the display control unit 12.

The display control unit 12 built into the transmissive liquid crystal display 10 performs the following processing based on the welding current value Id and the welding voltage value Vd.
1) The numerical values of the welding current value Id and the welding voltage value Vd are displayed at predetermined positions on the transmissive liquid crystal display 10.
2) The transmittance at a predetermined position in the central portion of the transmissive liquid crystal display 10 is changed according to the value of the welding current value Id.

FIG. 2 is a cross-sectional view of the center of the welded light-shielding surface 9, showing the inner structure. Hereinafter, the structure of the welded light-shielding surface 9 will be described with reference to the figure. A light-shielding plate 14 is attached to the light-shielding plate mounting frame 15 (made of metal). The periphery of the transmissive liquid crystal display 10 is surrounded by a magnet frame 13, and is fixed to the light-shielding plate mounting frame 15 by a magnetic force.

FIG. 3 is a screen of the transmissive liquid crystal display 10 during welding. Hereinafter, the screen and the operation projected on the transmissive liquid crystal display 10 will be described with reference to the figure. On the screen, the welding current value Id and the welding voltage value Vd received by the receiver 11 are displayed. The welding current value and the welding voltage value are displayed by the control unit 12. As a result, the welding operator can observe the welding current value and the welding voltage value even during welding.

The transmittance of the light-shielding plate 14 of the welded light-shielding surface 9 is standardized by JIS T 8141. The light-shielding degree number 9 is used for a small current with a welding current of 100 A or less, and light-shielding is used for a large current of 500 A or more. The degree number 16 is used, and as the welding current increases, a light-shielding plate having a larger light-shielding degree number and a lower transmittance is used. In the embodiment of the present invention, the light-shielding plate 14 is equipped with a light-shielding plate 14 having a light-shielding degree number 9 having the minimum necessary transmittance, and the transmittance in a predetermined range in the central portion of the transmissive liquid crystal display 10 shown in FIG. Is changed according to the welding current value Id, so that the welding light-shielding surface 9 can be automatically adjusted to have an appropriate light-shielding degree according to the welding current. By changing the transmittance only in a predetermined range in the central portion, the minimum brightness of the peripheral visual field that the welding operator can see through the welding light-shielding surface 9 can be ensured, so that the welding position in the welding torch operation direction can be ensured. Can be easily confirmed.

As shown in FIG. 3, the transmissive liquid crystal display 10 is surrounded by a magnet frame 13, and the magnet frame 13 is only magnetically fixed to the light-shielding plate mounting frame 15 (made of metal) and can be easily removed. be able to. Therefore, when the welding light-shielding surface 9 is not used, the transmissive liquid crystal display 10 can be carried to a place away from the welding work place, and by fixing it to a metal part such as a work desk, the welding current value and the welding voltage value can be hand-free. It is also possible to use it as a welding condition monitoring device that can confirm the above.

In the embodiment of the present invention, only the consumable electrode type arc welding power supply has been described, but the welding condition monitoring device can also be used for the non-consumable electrode type arc welding power supply such as TIG welding.

1 Welding wire 2 Base material 3 Arc 4 Welding torch 5 Feeding roll 6 Base material cable 7 Power cable 8 Transmitter 9 Welding shading surface 10 Transmissive liquid crystal display 11 Receiver 12 Display control unit 13 Magnet frame 14 Shading plate mounting frame PM welding Power supply WM Feed motor ID Welding current measuring device VD Welding voltage measuring device Id Welding current value Vd Welding voltage value

Claims (2)

Welding current measuring device that measures welding current and
Welding voltage measuring device that measures welding voltage and
A transmitter that transmits the welding current value measured by the welding current measuring device and the welding voltage value measured by the welding voltage measuring device, and
A receiver that receives the welding current value and welding voltage value transmitted from the transmitter, and
Provided with a transmissive liquid crystal display that displays the welding current value and welding voltage value received by the receiver.
Welding condition monitoring device characterized by. The transmissive liquid crystal display changes the transmittance in a predetermined range according to the welding current value received by the receiver.
The welding condition monitoring device according to claim 1.

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