JPH0358830B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to counting and displaying welding time in a welding power supply device.

Conventional configuration and its problems Conventionally, when counting welding time, the current detection circuit was connected to a mechanical clock and the clock was run while the welding current was flowing, but a special device for counting welding time was used. Therefore, the cost was high and the time counting work was complicated, which was not acceptable in terms of welding work management.

Purpose of the Invention The present invention starts accumulative addition of welding time at any time and displays the total welding time at any time, thereby making it easier and more accurate to measure the operating rate, efficiency, and work management of a welding power supply device. The goal is to help you do it well.

Structure of the Invention In order to achieve this object, as shown in FIG. Computing the signals transferred from the current detection circuit 2 and the reference clock generation circuit 4,
An arithmetic circuit 3 for counting the time during which welding current is detected, a display output circuit 6 and a display section 7 for displaying the welding current detection time, the reference clock generation circuit 4, the arithmetic circuit 3, and a display output circuit. A control circuit 5 is provided to control the control circuit 6. With this configuration, the arithmetic circuit 3 performs a logical operation on the 1 second cycle clock signal sent from the reference clock generation circuit 4 and the current detection signal sent from the current detection circuit 2, and the welding current is detected by the current detection circuit 2. The detected time is counted and displayed on the display unit 7.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 2 of the drawings. A current detector (hereinafter referred to as shunt) 2a of the current detection circuit 2 is provided at a location where the welding current flows through the base material 1 to be welded, converts the welding current value into a voltage value, and sends the voltage value to the comparator 2b. Comparator 2b
Then, the reference voltage generated by the reference voltage generation circuit 2c and the voltage sent from the shunt 2a are compared, and when the voltage sent from the shunt 2a is larger, the current detection signal is inputted to the arithmetic unit 3a of the arithmetic circuit 3. . In this embodiment, the reference voltage is set so that the current detection signal is sent when approximately 40 A or more flows through the shunt 2a.

Further, the reference clock generating circuit 4 generates a rectangular wave with a period of 1 second and sends it to the arithmetic unit 3a of the arithmetic circuit 3. The arithmetic unit 3a performs an AND operation between the current detection signal sent from the comparator 2b and the rising edge of the rectangular wave sent from the reference clock generation circuit 4, and sends the result to the counter 3b of the arithmetic circuit 3. That is, while the current is being detected, the counter 3b
send a signal to

The counter 3b includes a second counter 3b-1.
There are a minute counter 3b-2 and an hour counter 3b-3, and the second counter 3b-1 is incremented by one each time a signal is received from the arithmetic unit 3a. The second counter 3b-1 and the minute counter 3b-2 are sexagesimal counters, and when the second counter 3b-1 completes one cycle, the minute counter 3b-2 is incremented by one, and when the minute counter 3b-2 completes one cycle, the hour counter 3b-3 increases. 1
The value is incremented by one.

Further, among the counters 3b, a minute counter 3b-2
and the contents of the time counter 3b-3 are displayed on the display output circuit 6.
and displayed on the display section 7 when necessary. The display section 7 is a 7 segment LED (Light
Emitting Diode) was used. The arithmetic circuit 3, reference clock generation circuit 4, and display output circuit 6
The operation of the control circuit 5 is controlled by a control circuit 5 consisting of a logic operation element including a microcomputer and a memory element.

Effects of the Invention According to the present invention, it is possible to easily calculate the operation rate and efficiency by counting and displaying the welding time of the welding power supply device, and this has the excellent effect of making it easier to manage the welding work. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a welding power supply device of the present invention, and FIG. 2 is a block diagram showing an embodiment of the present invention. 1...Base material to be welded, 2...Current detection circuit, 3...
...Arithmetic circuit, 4...Reference clock generation circuit, 5...
. . . control circuit, 6 . . . display output circuit, 7 . . . display unit.

Claims (1)

[Claims] 1. A current detection circuit that detects the presence or absence of welding current flowing through the base material of the workpiece, a reference clock generation circuit,
a calculation circuit that calculates the signals transferred from the current detection circuit and the reference clock generation circuit and counts the time during which the welding current is flowing; a display output circuit and a display section for displaying the welding current detection time; and a control circuit that transfers the calculation result of the calculation circuit to the display section as a character or symbol signal, and the calculation circuit performs a logical product of the signal from the reference clock generation circuit and the signal from the current detection circuit. an arithmetic unit that performs an operation; a second counter that advances counting when an AND operation of the arithmetic unit is established;
A welding power supply device comprising: a minute counter that advances counting upon detecting that the second counter has increased; and a time counter that advances counting upon detecting that the minute counter has increased. .