JPH03254366A - arc welding power supply - Google Patents

Abstract

PURPOSE:To more closely and easily control welding work by detecting a welding current, counting the welding time and the number of weldings and subjecting the result to regenerative display arbitrarily. CONSTITUTION:The welding time and the number of weldings are counted by a control means 3 provided with a timer 3a and a processing part 3b by using a current detection means 1 to decide whether or not the welding current output has exceeded a certain level and an operation means 2 to input a signal to regenerate or reset a measured result. The result is subjected to regenerative display arbitrarily by a storage means 4 and a display means 5. As a result, the welding work can be controlled more closely, easily and accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an arc welding power source used in an arc welder.

BACKGROUND OF THE INVENTION Conventional arc welding power sources are equipped with a function to count the number of welding operations as part of the management of welding operations. For example, in the case of an arc spot where welding is repeated in a short period of time, a method is used in which the number of times of welding is counted using a torch switch signal, which is a signal during welding.

Problems to be Solved by the Invention However, with such conventional welding power sources, it is not possible to measure the welding time under each welding condition or the total welding time, and the number of welding times cannot be measured.
However, it was difficult to make measurements for different welding conditions. For this reason,
In the past, welding work was poorly managed.

An object of the present invention is to provide a welding power source that solves these conventional problems.

Means for Solving the Problems In order to achieve the above object, the present invention provides a current detection means for determining whether the welding current output exceeds a certain level, and a signal for storing, reproducing or resetting the measurement results. An operating means for inputting information, a control means for counting the welding time and the number of welds using an internal timer function based on the output signals of the current detection means and the operating means, a display means for displaying the results of the control means, and a control means. and storage means for storing or reproducing the results.

According to the present invention, a function can be added to the control means that does not apply the output of the current detection means to the tube for a certain period of time.

Further, in the present invention, a replaceable card type external storage means can be used as the storage means.

According to the present invention, with the above configuration, the welding current is detected, the welding time and the number of welding times are counted, and the welding time and the number of welding times are arbitrarily stored and displayed, thereby making it possible to more easily manage the welding work in more detail.

EXAMPLES Hereinafter, the present invention will be explained based on the accompanying drawings. FIG. 1 is a block diagram of an arc welding power source showing one embodiment of the present invention, in which 1 is a current detection means, 2 is an operating means, 3 is a control means, and 3a is a timer 3b is a processing section. 4 is a storage means, and 5 is a display means.

The current detection means 1 is composed of a comparator using a general operational amplifier, etc., and converts the welding output current to a certain reference voltage value into a voltage signal using a shunt, C, T, (current transformer), etc. The control means 31 outputs a HIGH signal when the value is high, and a LOW signal when the value is low. Note that it is also effective to provide the comparator with hysteresis characteristics to prevent the current detection signal from being interrupted due to an operation such as arc breakage.

The operating means 2 includes a reset switch 6 and a memory number setting switch 7, as shown in FIG. By pressing the reset switch 6, a command signal for clearing the memorized welding time and number of welding is sent to the control means 3.
Output to. The memory number setting switch 7 is a setting switch for specifying the welding time or the number of one block storing the welding time (hereinafter referred to as the memory number).
7a is a switch to increase the memory number,
7b is a switch for lowering the memory number.

The control means 3 is constituted by a microcomputer,
It includes a timer 3a and a processing section 3b. Control means 3
controls the storage means 4 and the display means 5 by input signals from the current detection means 1 and the operation means 2.

The storage means 4 uses a RAM which is a general memory IC. This device is equipped with a backup battery, allowing the stored contents to remain even if the main welding power source is turned off. Here, based on the signal inputted by the operating means 2, data on welding time and number of welding is stored or reproduced in the address corresponding to the memory number set by the processing section 3b of the control means 3, and the processing section 3b
Transfer to.

Further, this storage means 4 can easily manage a large amount of data by using a replaceable card-type external storage means.

The display means 5 uses an LCD board, and the control means 3
A signal converted into a signal for displaying the memory number, welding time, and number of welding times is input and displayed. An example of the display is shown in FIG.

Next, the operation of the embodiment will be explained with reference to the flowchart shown in FIG. In FIG. 4, step 11 is an input from the operating means 2, which receives information as to whether the reset switch 6 and memory number setting switch 7 are turned on, and receives the information from the processing section 3b of the control means 3.
Stored inside.

In step 12, the memory number is set, and if the memory number up switch 7a of the operating means 2 is turned on, the memory number is increased, and the memory number down switch 7b is set. If is turned on, the memory number is determined by lowering the memory number. Here, it is also possible to add a function to change the memory number continuously at high speed when the switches 7a and 7b are kept on.

Step 13 is an input from the storage means 4, and data on the welding time and number of welding of the memory number determined in step 12 is manually inputted from the storage means 4 to the processing section of the control means 3.
b Stored internally.

The determination in step 14 is to determine the subsequent processing based on the information from the reset switch 6 of the operating means 2 and the contents stored in the processing section 3b of the control means 3.

The input of the current detection means in step 15 is a process when the reset switch is off as determined in step 14,
When the current detection, which is the output of the current detection means 1, is on, it is HI.
When the GH signal and current detection are off, the LOW signal is stored as a manual input in the processing unit 3b. Thereafter, the subsequent processing is determined by the judgment in step 16.

Counting of the welding time in step 17 is a process when the current detection is on in the judgment in step 16, and the timer 3a of the control means 3 counts the time during which the current detection is on, and the welding time data is obtained.

Counting the number of welds in step 18 is the next process after counting the welding time in step 17 or when the current detection is off in step 16, and when the current detection is turned on once and then turned off again, welding The number of times of welding is counted as one time. In addition, in order to avoid excessively counting the number of welds due to arc breakage, etc., the control means 3 is configured so that the result of the current detection signal for counting the number of welds is not detected for a certain period of time after it changes. is also valid.

Thereafter, in outputting to the storage means in step 19, the data of the counted welding time and the number of times of welding is outputted to the address of the storage means 4 according to the designated memory number.

The resetting of the welding time and the number of welding times in step 20 is a process performed when the reset switch is turned on as determined in step 14, and the data of the welding time and the number of welding times currently stored in the processing section 3b is cleared. Then step 19
In the output to the storage means 4, the data of the cleared welding time and number of welding is output to the address of the storage means 4 according to the designated memory number.

The output to the display means in step 21 is to convert the data of the welding time, welding time, and its memory number based on the above results into data that can be displayed on the display means 5 and output it to the display means 5.

Effects of the Invention As is clear from the above embodiments, according to the arc welding power source of the present invention, the welding time and the number of welds are counted by the control means using the current detection means and the operation means, and the welding time and the number of welding times are counted by the storage means and display. Since the display is arbitrarily memorized and reproduced by means of the means, there is an effect that the welding work can be managed more precisely, easily and accurately.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of an arc welding power source showing an embodiment of the present invention, FIG. 2 is a front view showing an example of the configuration of an operating means in an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a front view showing an example of the configuration of the display means in the example, and a flowchart showing the operation of the control means in the example of the present invention. DESCRIPTION OF SYMBOLS 1... Current detection means, 2... Operating means, 3... Control means, 3a... Timer 3b... Processing part, 4...
Storage means, 5... Display means, 6... Reset switch, 7... Memory number setting switch.

Claims (3)

[Claims] (1) A current detection means for determining whether the welding current output exceeds a certain level, and an operation means for inputting a signal for storing, reproducing or resetting the measurement results;
a control means for counting the welding time and the number of times of welding using an internal timer function based on the output signals of the current detection means and the operation means; a display means for displaying the results of the control means; and a display means for displaying the results of the control means. An arc welding power source comprising storage means for storing or reproducing information. (2) The arc welding power source according to claim (1), wherein the control means has a function of not accepting the output of the current detection means for a certain period of time. (3) The arc welding power source according to claim (1) or (2), wherein the storage means is a replaceable card-type external storage means.