JPS5841672A - Regulating device for welding output conditions - Google Patents

Abstract

PURPOSE:To permit regulation of welding output conditions on the welder's side by so constituting a titled device that the output conditions are changed over when the push button type torch switch for opening and closing the output of an electric power source device for welding is turned on an off intermittently and repeatedly in a short time. CONSTITUTION:The signal of a push button switch 3 for opening and closing of outputs provided on the welder's side is inputted to a gate circuit 14. In the circuit 14, whether the signal of the switch 13 is the signal for starting of welding or the signal for changing over of the output conditions of the welding machine is judged. In the case of changing over the welding conditions, plural pulses from A of the circuit 14 are applied to a zero pulse excluding circuit 15 to exclude the 1st signal of the switch 13. More specifically, when (n)-times of the signals of the switch 13 enter the circuit 15, (n-1)-times of pulses excluding the 1st pulse are inputted to a count circuit 16. Here, a reset circuit 17 creates pulses of a micro-width from the rise of the 2nd pulse, and inputs the signal from the circuit 16 to an output changing-over circuit, so that welding output conditions are selected by the times of the switch 13 pushed in a constant time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding output condition adjusting device that adjusts welding output conditions such as welding current and welding voltage (adjusts output switching).

Conventionally, when adjusting welding output conditions such as welding current and welding voltage by remote control, a remote control device 3 is connected to a welding power supply device 1 via a remote control cable 2, as shown in Fig. However, this was done by changing the value of the variable resistor of the remote control device 3. In addition, in Figure 1,
4 is a welding torch; 5 is a feeder cable 741-s'' for feeding welding wire to the welding torch 4;
is the welding base material.

By the way, in actual welding sites where large structures are handled, such as in the shipbuilding industry, work locations are frequently moved, and as a result, it is necessary to carry a welding torch, feeder, and remote control device at the same time. Carrying bags was a very troublesome task.

In order to eliminate this inconvenience, as shown in Fig. 2, a small variable resistor 8 is built into the welding torch 4 to make it a welding torch equipped with a remote control device, and the welding torch 4 is connected to the remote control cable 2 for welding. The cable 6a connecting the torch switch 9 to the welding torch 4 and the feeder cable having the electric cable 6b may be integrated, but the welding torch 4 becomes incompatible and the welding torch becomes very expensive. Moreover, the degree of occurrence of failure becomes large, which is a big problem for welding torches that are highly consumable items.

The present invention solves these problems and allows the welding operator to adjust the welding output conditions manually without special processing on a special remote control device or welding torch. It is □.

In the present invention, the output conditions are changed by repeatedly turning on and off the torch switch, which is a push button switch for opening and closing the output of the welding power supply device, intermittently in a short period of time. Figure 3 showing an example of
This will be explained using the drawing of FIG.

FIG. 3 shows a block circuit of a welding output condition adjusting device according to an embodiment of the present invention. In FIG. 3, reference numeral 10 indicates an output switching relay of the welding power supply device, and 11 indicates a relay of this output switching relay 10. A driving transistor, 12 a DC power supply, 13 a push button switch for opening and closing the output of the welding power supply device, and a torch switch provided on the welding torch. The signal from the push button switch 13 is input to the gate circuit 14, and the gate circuit 14 determines whether the signal from the push button switch 13 is a signal to start welding or a signal to switch the output conditions of the welding machine, based on the open/closed state of the push button switch 13. Discern. When switching the welding output conditions, a plurality of pulses from Q of the gate circuit 14 are applied to the zero pulse exclusion circuit 15 and the first push button switch 1 is applied.
3 signals are excluded. That is, when the signal from the push button switch 13 enters the zero pulse exclusion circuit 16 n times, the first pulse is excluded and n-1 pulses are input to the count circuit 16. In circuit 17,
A minute width pulse is generated from the rise of the second pulse, and a count signal from the count circuit 16 is obtained. The signal from the count circuit 16 is input to the output switching circuit 18, and the welding output condition can be selected based on the number of times the push button switch 13 is pressed within a certain period of time.

On the other hand, during welding, after a certain period of time after the pushbutton switch 13 is fully pressed 1~, the output of the gate circuit 14 becomes high level, the transistor 1-1 is turned on, and the output switching relay 10 is operated.

As described above, according to this embodiment, the welding output conditions can be adjusted using the push button switch 13 for opening and closing the welding output. This is shown in the time chart as shown in Figures 4 and 5.
The result will be as shown in the figure. Note that in FIGS. 4 and 5, T is the delay time of the gate circuit 14. That is, if the next pulse is input within the time To, it is regarded as a welding output condition switching signal, and if the pulse lasts longer than the time To, it is regarded as a welding start signal. The time T is empirically set to a small value of about 0.3 seconds to 1 second.

Next, a specific circuit of the welding condition adjusting device of the present invention will be explained.

FIG. 6 shows an embodiment of the gate circuit 14. In FIG. 6, 19 is a resistor for setting a time limit, 20 is a capacitor for setting a time limit, 21 is a monostable multivibrator, and 2 is a monostable multivibrator.
2.23 is an AND gate.

In this Fig. 6, a monostable multivibrator 21
The pulses that are repeated within the delay time T0 set by T0 go out as an output, and when the pulses continue for more than T0, the transistor 11 is activated and the output switching relay 10 of the welding machine is closed.

FIG. 7 shows an embodiment of the zero pulse exclusion circuit 15 and the seven-bit circuit 17, in which 24.25 is a JK flip-flop, 26.27 is an AND gate, 28.29 is an inverter, 30 is a resistor, and 31 is a capacitor.

In this circuit, the first pulse generated by pressing the pushbutton switch 13 for the first time is generated by two TK flip-flops 24.25 and two AND gates (26.27).
, and the second and subsequent consecutive pulses are output. At this time, the rising edge of the second pulse is extracted and the inverters 28, 29. Resistance 30. In addition to a circuit for obtaining a narrow pulse of t in the capacitor 31, a 97-node signal from the count circuit 16 is obtained.

FIG. 8 shows an embodiment of the count circuit 16 and the output switching circuit 18. In FIG. 8, 32 is a BCD counter, 33 is a decoder, 34, 35, and 36 are analog switches, and 37
, 38 and 39 are variable resistors as welding output condition regulators. The pulse generated by the pushbutton switch 13 is BC
When input to the D counter 32, it is once converted into a BCD code and outputted. This BCD counter 32
The decoder 33 receives the output from the input signal, and turns on the analog switches 34, 35, and 36 corresponding to the input signals. These analog switches 34, 35, 36 are connected to the contacts of the variable resistor 37, 38, 39 for adjusting the output of the welding machine, so the operating analog switches 34, 35, 36
A welding machine output adjustment signal determined by a welding machine output adjustment variable resistor 37° 38.39 connected to terminals 35 and 36 is applied to the control circuit of the welding power supply device.

As described above, according to the welding output condition adjusting device according to the present invention, the welding output conditions such as welding current and welding voltage of the welding power supply device are adjusted by the number of times the push button switch for opening and closing the output is turned on. You can get an effect like this.

(1) The welding output conditions can be adjusted using only the welding torch without adding a special remote control device.

(2) Since there is no need for a remote control device, it is easier to move the welding work site, and it is also easier to adjust the welding output conditions in a work place where you have to climb to high places, making it possible to perform highly safe work.

(3) If the welding workshop is several tens of meters away from the welding power supply, using a remote control device with a long cable often caused failures due to cable breakage, but this problem will no longer occur. At the same time, it is possible to reduce the price.

As described above, according to the present invention, reliability in semi-automatic welding of large structures in the shipbuilding industry, bridge industry, etc. can be increased.

[Brief explanation of the drawing]

Figure KS1 is a schematic diagram showing a conventional device that adjusts welding output conditions by remote control, Figure 2 is a perspective view showing a welding torch of a welding output condition adjustment device that adjusts welding output conditions by hand, and Figure 3. The figure is a block circuit diagram of a welding output condition adjusting device according to an embodiment of the present invention, FIG. 4 is a time chart when setting welding output conditions of the same device, FIG. The figure is a block circuit diagram showing an example of the gate circuit of the same device, FIG. 7 is a block circuit diagram showing an example of the zero pulse exclusion circuit and 7-bit circuit of the same device, and FIG. FIG. 2 is a block circuit diagram showing an example of a circuit and an output switching circuit. 1o... Output switching relay, 13...
Push button switch, 14... Gate circuit, 15...
...Zero pulse exclusion circuit, 16...Count circuit, 18...Output switching circuit, 37, 38.39
・・・・・・Variable resistor. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] A torch switch provided on the welding torch and for opening and closing the output of the welding power supply device, and when the time limit interval of this torch switch is equal to or longer than a certain time period, it is processed as an output opening/closing command signal of the welding power supply device. If it is less than a certain time period, it is processed as a signal for adjusting the welding output condition, and a control circuit unit that determines the welding output condition by counting the number of times the torch switch is turned on intermittently; A welding output condition adjusting device consisting of a plurality of welding output condition adjusters whose conditions can be adjusted.