JPH05285657A - Power feed controller for consumable electrode welding machine - Google Patents

Abstract

PURPOSE:To synthetically control consumable electrode welding and to stabilize the quality by controlling height adjustment of a welding torch and power feeding state adjustment. CONSTITUTION:A height detector 7 detects the height of a torch block 1, a height detection signal 28 is sent to a comparator 31 and a deviation signal 32 with a set signal 30 is inputted to an arithmetic and control unit 37. In the same manner, a power feed signal 33 showing a power feeding state of a welding current, the welding voltage, etc., from a welding power source 12 is inputted to the arithmetic and control unit 37. The arithmetic and control unit 37 then sends control signals 34, 35 and 36 to a motor 2 for adjusting the torch height, a motor 23 for adjusting the power feeding state and the welding power source 12, respectively based on the deviation signal 32 from the comparator 31 and the power feed signal 33 from the welding power source 12 to execute control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply controller for a consumable electrode type welding machine.

[0002]

2. Description of the Related Art In a consumable electrode type welding machine, maintaining a constant distance between a welding wire and a welding base metal and a power supply state to the welding wire is important for stable welding.

However, at present, there is no power supply control device capable of comprehensively controlling the distance between the welding wire and the welding base metal and the power supply state to the welding wire.

[0004]

As described above, conventionally, there is a power feeding control device capable of comprehensively controlling the distance between the welding wire and the welding base metal and the power feeding state to the welding wire. Therefore, when the welding current and welding voltage became unstable, whether the cause was the change in the distance between the welding wire and the welding base metal, or the deterioration of the power supply state to the welding wire. I didn't know what it was, and I had to make adjustments.

In view of the above situation, the present invention provides a consumable electrode type welding machine capable of comprehensively controlling the distance between the welding wire and the welding base material and the power supply state to the welding wire. An object is to provide a power supply control device.

[0006]

SUMMARY OF THE INVENTION The present invention is a welding torch 9.
Height detection signal 28 from the height detector 7 for detecting the height of the
And a comparator 31 for taking a deviation from the height setting signal 30 set in the setter 29, a deviation signal 32 from the comparator 31 and a power feeding signal 3 indicating a power feeding state from the welding power source 12.
3 is input to adjust the height of the welding torch 9, the torch height adjusting motor 2, the power feeding state adjusting motor 23 that adjusts the power feeding state to the welding wire 10, and the welding power source 12
The present invention relates to a power supply control device for a consumable electrode type welding machine, characterized in that an arithmetic and control unit 37 for sending control signals 34, 35 and 36, respectively, is provided.

[0007]

According to the present invention, the height detection signal 28 indicating the height of the welding torch 9 detected by the height detector 7 and the height setting signal 30 set by the setting unit 29 are compared with each other by the comparator 31.
To the comparator 31, the deviation is taken by the comparator 31,
A torch height adjusting motor for inputting a deviation signal 32 from the welding power source 12 and a power feeding signal 33 indicating a power feeding state from the welding power source 12 to the arithmetic and control unit 37 so that the arithmetic and control unit 37 adjusts the height of the welding torch 9. 2, a motor 23 for adjusting the power supply state for adjusting the power supply state to the welding wire 10, and a welding power source 12
To control these by sending control signals 34, 35 and 36, respectively.

[0008]

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

1 to 4 show an embodiment of the present invention.

In FIG. 1, 1 is a torch block which constitutes a consumable electrode type welding machine and which can be moved up and down. A torch height adjusting motor that is moved up and down, 7 is a height detector attached to the torch block 1 via an insulating plate 8, 9 is a welding torch integrally attached to the lower end of the torch block 1, and 10 is a welding torch. A welding wire, 11 is a welding base material, and 12 is a welding power source for supplying power between the welding torch 9 and the welding base material 11.

As shown in FIG. 2, the welding torch has a torch main body 15 through which the welding wire 10 rewound from the wire reel 13 by the wire feeding roller 14 is passed, and the torch main body 15 is provided. And a shield gas nozzle 17 configured to inject a shield gas 16 into a welding groove (not shown) formed in the welding base material 11 so as to surround the outer periphery of the torch body 15. Has a wire supply hole 18 through which the welding wire 10 passes, and a slit 19 (see FIG. 3) at the tip and a taper surface 21 that wedges with the taper surface 20 formed inside the torch body 15 to open and close the slit 19. And a motor 23 for adjusting the power supply state via the pinion 22 at the rear end.
A power feeding chuck 25 having a rack 24 connected to (see FIG. 1) is provided so as to be able to move up and down.
6 are configured.

In FIG. 2, 27 is an insulating sleeve interposed between the torch body 15 and the shield gas nozzle 17.

Further, as shown in FIG. 1, a comparator 31 is provided which takes a deviation between the height detection signal 28 from the height detector 7 and the height setting signal 30 from the setting device 29, and the comparator 31 is provided. 31
Deviation signal 32 from the welding power source 12 and a power feeding signal 33 indicating a power feeding state such as welding current and welding voltage from the welding power source 12 are input to the torch height adjusting motor 2, the power feeding state adjusting motor 23, and the welding power source 12 Control signals 34, 35, 3 respectively
An arithmetic and control unit 37 for sending 6 is provided.

Next, the operation will be described.

First, the welding wire 10 rewound from the wire reel 13 by the wire feeding roller 14 passes through the wire supply hole 18 formed in the power feeding chuck 25 inside the welding torch 9 and opens the welding base material 11 (not shown). The welding power is supplied from the welding power source 12 between the welding torch 9 and the welding base metal 11 to generate an arc between the welding wire 10 and the groove to perform welding. I am trying.

In order to stabilize the welding, it is necessary to keep the distance between the welding torch 9 and the welding base metal 11 constant. This is done by driving the torch height adjusting motor 2. The adjustment can be performed by moving up and down the torch block 1 via the screw 5 and the nut 4, and moving up and down the welding torch 9 integrated with the torch block 1.

In order to stabilize the welding, it is necessary to keep the power supply state from the welding power source 12 to the welding wire 10 constant. This is done by driving the power supply state adjusting motor 23. The power feeding chuck 25 is moved up and down through the rack 24 and the taper surface 21 at the tip of the power feeding chuck 25 and the tapered surface 2 formed inside the torch body 15.
The power supply state can be adjusted by changing the wedged state with 0 and changing the contact pressure on the welding wire 10.

In the present invention, the distance between the above-described welding torch 9 and the welding base metal 11 and the welding power source 12 to the welding wire 1 are used.
It is possible to comprehensively control the power supply state to 0.

That is, the height detector 7 detects the height of the torch block 1, sends the height detection signal 28 from the height detector 7 to the comparator 31, and the comparator 31 sends the height detector signal 28 to the setter 29 in advance. The deviation from the set height setting signal 30 is calculated, and the deviation signal 32 from the comparator 31 is input to the arithmetic and control unit 37.

Similarly, the power supply signal 33 indicating the power supply state such as welding current and welding voltage from the welding power source 12 is input to the arithmetic and control unit 37.

Then, in the arithmetic and control unit 37, the comparator 31
Deviation signal 32 from the power supply signal 33 from the welding power source 12
Based on the control signals 34, 3 to the torch height adjusting motor 2, the power supply state adjusting motor 23, and the welding power source 12, respectively.
5, 36 are sent to control the torch height adjusting motor 2, the power supply state adjusting motor 23, and the welding power source 12 as shown in FIG.

That is, prior to the start of welding, the arithmetic and control unit 37 sends a control signal 34 to the torch height adjusting motor 2 to drive the torch height adjusting motor 2 to raise and lower the (welding) torch 9. Then, the height of the welding torch 9 is adjusted until the value of the deviation signal 32 from the comparator 31 becomes zero.

When the height of the welding torch 9 becomes appropriate, the arithmetic and control unit 37 sends a control signal 36 to the welding power source 12 to supply electric power between the welding torch 9 and the welding base metal 11 to start welding. To do.

When welding is started, the arithmetic and control unit 37 monitors the power supply signal 33 from the welding power source 12 to check whether the (welding) current or the (welding) voltage is appropriate.

If the welding current and the welding voltage are proper, the welding is continued until the welding is completed. If the welding current and the welding voltage are not proper, the height of the welding torch 9 is monitored again.
If the height of the welding torch 9 is abnormal, the height of the welding torch 9 is adjusted, and if the height of the welding torch 9 is normal,
Since the power feeding chuck 25 has worn and the power feeding state from the welding power source 12 to the welding wire 10 has deteriorated,
The arithmetic and control unit 37 sends a control signal 35 to the motor 23 for adjusting the power supply state to move the power supply chuck 25 up and down and adjust the power supply state by changing the contact pressure of the power supply chuck 25 on the welding wire 10 as described above. .

Then, as described above, when the welding is finished, the control by the arithmetic and control unit 37 is also finished.

From the above, the welding torch 9 and the welding base metal 11
And the state of power feeding from the welding power source 12 to the welding wire 10 are comprehensively controlled, and stable welding results can be obtained without any adjustment work.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0029]

As described above, according to the power feeding control device for a consumable electrode type welding machine of the present invention, the distance between the welding wire and the welding base metal and the power feeding state to the welding wire are comprehensively evaluated. The excellent effect of being controllable can be achieved.

[Brief description of drawings]

FIG. 1 is an overall schematic view of an embodiment of the present invention.

FIG. 2 is an enlarged view of the welding torch of FIG. 1 with a part thereof cut away.

FIG. 3 is an enlarged view of a tip of the power feeding chuck of FIG.

FIG. 4 is a control flowchart of the present invention.

[Explanation of symbols]

 2 Torch height adjusting motor 7 Height detector 9 Welding torch 10 Welding wire 23 Power feeding state adjusting motor 28 Height detection signal 29 Setting device 30 Height setting signal 31 Comparator 32 Deviation signal 33 Power feeding signal 34, 35, 36 control signal 37 arithmetic and control unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ikuo Shiina Ikuo Shiina 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi Kawashima Harima Heavy Industries Ltd. Technical Research Institute (72) Takehiro Murayama Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa No. 1 Ishi Kawashima Harima Heavy Industries Ltd. Technical Research Institute

Claims (1)

[Claims] 1. A comparator 31 is provided which takes a deviation between a height detection signal 28 from a height detector 7 for detecting the height of the welding torch 9 and a height setting signal 30 set in a setter 29. ,
The torch height adjusting motor 2 for adjusting the height of the welding torch 9 by inputting the deviation signal 32 from the comparator 31 and the power feeding signal 33 indicating the power feeding state from the welding power source 12, and the welding wire 10. To the welding power source 12 and the power supply state adjusting motor 23 for adjusting the power supply state to the welding power source 12, respectively.
An electric power supply control device for a consumable electrode type welding machine, which is provided with an arithmetic and control unit 37 for sending 35 and 36.