KR19980043422U - Remote control device for welding condition memory type carbon dioxide (CO₂ / MAG) arc welding machine - Google Patents

Abstract

The present invention is a welding condition memory arc welding machine for securing welding quality in carbon dioxide arc welding. It uses digital signal processing and data communication technology using microprocessor to realize the systematic management and execution of welding conditions remotely, and various automation equipment. The present invention relates to a remote control device of a carbon dioxide arc welding machine that can easily select welding conditions according to the process and has a terminal memory function for input / output of data and an condition memory device for an arc welding power supply. The microprocessor 10 is connected to the input key input device 11 and the display device 12 for displaying the input status and current / voltage detection value during welding through the input / output buffer 13, and the microprocessor 10 ), There are digital ports 14 for contact signals such as gas check, forward and reverse inching, and five preliminary signals. Remote control device of analog signal voltage is variably controlled by the variable resistor 16 for adjusting the arc characteristics of the folds are to be converted to digital A / D converter 17, the carbon dioxide arc welding machine, characterized in that associated with each.

Description

Remote control device for welding condition memory type carbon dioxide (CO2 / MAG) arc welding machine

The present invention relates to a welding condition memory arc welding machine for securing welding quality in CO ₂ / MAG arc welding (hereinafter referred to as carbon dioxide arc welding), and more specifically, digital signal processing and data communication technology using a microprocessor. CO2 system can be used to realize systematic management and performance of welding technology remotely and to select welding conditions according to processes in various automation equipments, as well as condition memory device of arc welding power supply and terminal processing function for input and output of data. A remote control device for an arc welder.

In the CO2 arc welding machine, the welding wire wound in the coil state instead of the welding rod of manual arc welding is fed by the feed roller of the feeding device to the welding torch head through the spring liner and the contact tube. Is supplied by the contact tube to generate an arc between the base metal.

In other words, the carbon dioxide arc welding process automatically supplies consumable wires and joins metals with heat sources to the electric arc generated between the welded material (base metal) of the wires. The use in the field is increasing.

However, in general, the welding conditions for maintaining the proper welding strength in carbon dioxide arc welding can be applied to the standard conditions presented in various standards and handbooks, or modified and supplemented conditions through quality inspection. .

However, it is difficult to quantitatively manage the welding conditions such as welding current and voltage, protective gas mixture ratio, and gas flow rate, which are the main parameters in the production site.In most cases, the welder is welded because the welding place and the welding power supply are separated from each other. It was difficult to check whether the condition was correctly performed.

In addition, the conventional remote control device away from the remote control device is likely to change the welding current and voltage to be adjusted by a variable resistor due to external factors during the welding operation, but because there is no way to respond to the application conditions There is a possibility that there is a deviation between the conditions and the working standards, there is a problem that causes an unbalanced welding quality.

In addition, in the conventional welding machine, since the main operation switch, the welding current, and the voltage indicator are mounted on the welding power supply device, there is a disadvantage in that it is difficult to verify the operation and the welding result at a remote place where actual welding is performed.

The present invention has been devised to solve the above problems, and the various operation switches can be arranged in the remote control device so that the operation such as gas check, forward and inching can be performed, so that the adjustment and confirmation work can be improved. Remote control of CO2 arc welding machine that can monitor and control welding quality fluctuations by setting and memorizing a series of welding conditions to systematically manage and confirm actual welding results (welding current, voltage) during or after welding The object is to provide a device.

1 is an external view showing a carbon dioxide arc welding machine of the present invention,

2 is an internal block diagram showing a remote control device of the carbon dioxide arc welding machine of the present invention,

3 is a front panel showing a remote control device of the present invention,

4 is a flow chart illustrating the remote control device of the present invention,

5 is a schematic diagram of a welding condition memory area and a standard welding condition applied to the remote control apparatus of the present invention.

* Description of the symbols for the main parts of the drawings *

1: welding power supply 2: wire feeder and remote control device

3: signal cable 4: interface

The remote control device of the carbon dioxide arc welding machine of the present invention for achieving the above object is a key input device 11 that receives a user's request as a basic input / output unit and a display for displaying the input status and current / voltage detection value during welding. The device 12 is connected to the microprocessor 10 through an input / output buffer 13, and the microprocessor 10 has a digital port 14 for five preliminary signals and contact signals such as gas check and forward and reverse inching. The analog / digital converter 17, in which the signal voltage which is variably controlled by the variable resistor 16 for adjusting the arc characteristic of the welding machine, is converted to digital, is connected to each other.

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

1 is an external view showing a carbon dioxide arc welding machine of the present invention, in which 1 is a welding power supply device, 2 is a wire feeding device and a remote control device, and 3 is a wire in the welding power supply device 1. A signal cable 3 for supplying power and gas to the supply device and the remote control device 2 and data input / output is shown.

The welding power supply 1 has a built-in welding condition memory circuit, a digital welding current / voltage output meter is installed on the front panel, a separate interface 4 is installed inside, and the output terminal and the control line are located on the front side. It is located at the bottom.

The wire feeding device and the remote control device 2 are provided with a remote control device as shown in FIG. 2, and this remote control device has all operation functions of the front panel of the welding power supply in the existing welding machine, that is, wire diameter selection and gas. It has switches such as check and crater selection, control terminals such as crater current and variable voltage for voltage regulation, and sets welding conditions by integrating the user's requirements.

Therefore, the remote control device of the present invention is suitable for a welding condition memory arc welding machine for securing welding quality in carbon dioxide arc welding, by using digital signal processing and data communication technology using the embedded microprocessor 10. Systematic management and performance of welding conditions are realized at a remote location, and it is easy to select welding conditions according to the processes in various automation equipments, and it has a terminal memory function for input / output of condition memory device and data of arc welding power supply (1). have.

2 is an internal block diagram showing the remote control device of the carbon dioxide arc welding machine of the present invention, which has all the control functions (see FIG. 3) of the front panel of the welding power supply in the existing welding machine. Integrate the request and set the welding condition as shown in FIG. 5, and instruct the interface (4: welding condition memory and sequence control device) to store it through the key input device 11 shown in FIG. It has the function to select and the memorized welding condition.

The display device 12 shown in FIG. 3 has a monitoring function for monitoring the actual welding current and voltage during welding.

That is, the key input device 11 receiving a user's request as a basic input / output unit and the display device 12 for displaying the input status and the current / voltage detection value during welding are provided by the microprocessor 10 through the input / output buffer 13. ) Is connected.

The microprocessor 10 has a signal voltage that is digitally regulated by a variable resistor 16 for adjusting arc characteristics of a welding machine, and a digital port 14 for five preliminary signals and contact signals such as gas check and reverse inching. The analog / digital converter 17 which is converted into digital is connected, respectively.

Therefore, the microprocessor 10 incorporating these welding information transmits the user's request to the interface 4 through the communication port 15, and receives the set contents from the interface 4 and informs the user.

The key input signal 11 shown in FIG. 3 includes a mode key 21, a selector 22, a crater key 23, a gas check key 24, a forward and reverse inching key 25, and a current / step-up (down) ) Key 26, voltage / 10 step up (down) key 27 and display key 28, the display device 12 is a table and user LED 31, the program digitron 32, welding And crater LED 33, current digitron 34, voltage digitron 35, wire 0.9-1.0 and wire 1.2 LED 36, crater oil and crater continuous LED 37, and ready LED 38. have.

Each time the microprocessor 10 is operated by operating the mode key 21 of the key input device 11 shown in FIG. 2, the setting mode is switched in the following order and the corresponding condition blinks. First, as shown in FIG. 5, the selection of the condition area includes the welding condition to be applied as the standard condition (the condition suggested by the standard in various standards according to the type and thickness of the base material and the type of the welded joint) and the user setting condition ( Select from the conditions set by the user other than the standard conditions. Condition (program) number selection selects a program in which a condition is stored or inputs a program number to store a set condition.

Further, the wire diameter selection selects the size of the wire applied in the wire feeder and remote control device 2 shown in FIG. Welding current setting is the welding LED 33 is turned on and the welding current to be applied is input to the numerical value shown in the current digitron 34, welding voltage setting is welding LED 33 is lit and the welding voltage to be applied voltage Enter the numerical value shown in the digitron (35).

Therefore, in each mode, the selection is changed using the current / step up (down) key 26 or the current / step up (down) key 26 and the voltage / 10 step up (down) key 27 are used. The numerical values shown in the current and voltage digitrons 34 and 35 are changed.

When the above program is set and the selection key 22 is pressed, the program number is stored, and the ready LED 38 lights up to allow welding.

Then, the crater mode 23 can select / set the crater mode. First, the crater processing mode selection indicates that the crater oil and the self-maintaining LED 37 are all flashing and the crater selection mode, where the current / step-up ( The down key 26 is used to change the selection. For crater current setting, the crater LED 33 lights up and inputs the crater current to be applied, and for crater voltage setting, the crater LED 33 turns on and inputs the crater voltage to the numerical value.

In the key input device 11, the gas check key 24 opens and closes the contact of the gas valve with a switch used to confirm the flow rate of the protective gas and the like, and the inching key 25 performs forward and reverse inching of the welding wire. . The current / step-up (down) key 26 is a key for selection conversion in the program mode, a function key for increasing / decreasing the unit value when inputting a numerical value, and used as a fine control key for current during welding in the welding mode.

The voltage / 10 step up (down) key 27 is a function key for increasing / decreasing tens of values when a numerical value is input in the program mode, and is used as a key for fine adjustment of voltage during welding in the welding mode.

The display key 28 is a display switching key for program setting contents and actual current / voltage values during welding.

4 is an operational flow diagram for explaining the remote control device of the present invention, Figure 4 (A) is a general flow diagram illustrating the remote control device of the present invention, Figure 4 (B) is a welding condition selection of This is a detailed flow chart.

Here, the remote control device monitors the upper and lower limits of the set current for the selected wire diameter in order to prevent the user's setting error as much as possible, and also to make the setting within the upper and lower limits of the appropriate voltage which can be welded to the selected current. Keep it.

First, in the basic welding mode, the standard welding condition according to the table shown in FIG. 5 is applied by pressing the mode key 21 shown in FIG. 3 once and then using the current / step up (down) key 26. FIG. Decide whether to apply the welding condition (or new welding condition) stored in the user area.

After pressing the mode key 21 once, the current / step-up (down) key 26 and the voltage / 10 step-up (down) key 27 are stored. Number).

Then, to apply the condition of the selected number, the selector 22 is pressed to the READY mode, and to set a new condition, the mode key 21 is pressed to switch to the wire diameter selection mode. At this time, the wire horn to be applied is selected with the current / step-up (down) key 26.

The mode key 21 is pressed to switch to the welding current setting mode, and the current condition to be applied is set by the current / step up (down) key 26 and the voltage / 10 step up (down) key 27.

The mode key 21 is pressed to switch to the welding voltage setting mode, and the voltage condition to be applied is set using the current / step up (down) key 26 and the voltage / 10 step up (down) key 27.

Pressing the selection key 22 of the key input device 11 stores the current condition and switches to the weldable mode. Perform basic welding. To check the actual welding current and voltage of the current digitron 34 and the voltage digittron 35 in the display device 12 during basic welding, press the display key 28 to switch the displayed set value to a detection value.

On the other hand, in the crater mode, when the selector 22 of the key input device 11 is pressed in the above-described basic welding mode, the crater key 23 is the same until the current condition is stored and the welding mode is switched. Press to select crater processing at the end of welding (crater oil), welding in self-holding mode (crater continuous), crater processing at welding start and end (both crater oil and crater continuous light).

Press the crater key 23 again to set the crater current and voltage. The setting method is the same as the welding condition shown in FIG. 5, and when the crater current and the voltage are not specified, the current corresponding to 1/3 of the set welding current is basically set.

The welding mode selectable by the crater key 23 includes a basic mode, a craterless mode, a normal crater processing mode, a self hold mode (continuous), and a crater start mode.

As described above, according to the present invention, various operation switches can be arranged to operate gas check and reverse inching, so that the efficiency of adjustment and verification can be improved, and a series of welding conditions can be set and memorized and systematically managed. When applied to various automated devices, external I / O function is provided to automatically select the welding condition memorized according to the relevant process, and the welding quality can be changed by checking the actual welding result (welding current, voltage) during or after welding. It is possible to provide a remote control device of a carbon dioxide arc welder that can monitor factors.

Claims (4)

The key input device 11 receiving the user's request as a basic input / output unit and the display device 12 for displaying the current situation and the current / voltage detection value during welding are provided by the microprocessor 10 through the input / output buffer 13. Connected, The microprocessor 10 has a signal voltage, in which the digital port 14 for contacting signals such as gas check and reverse inching and five preliminary signals, is variably controlled by a variable resistor 16 for adjusting arc characteristics of the welding machine. Remote control device of the carbon dioxide arc welding machine, characterized in that the analog / digital converter 17 is converted to digital, respectively. 2. The key input device (11) according to claim 1, wherein the key input device (11) includes a mode key (21), a selector (22), a crater key (23), a gas check key (24), a forward / back inching key (25), a current / step-up ( A remote control device for a carbon dioxide arc welder, characterized in that it comprises a down) key (26), a voltage / 10 step up (down) key, and a display key (28). The display apparatus 12 of claim 1, wherein the display apparatus 12 includes a table and a user LED 31, a program digitron 32, a welding and crater LED 33, a current digittron 34, a voltage digitron 35, Remote control device for a carbon dioxide arc welder, characterized in that the wire 0.9-1.0 and wire 1.2LED (36), crater oil and crater continuous LED (38). The method of claim 1, wherein the microprocessor 10, which combines the welding information, transmits the user's request to the interface 4 through the communication port 15, and receives the contents set from the interface 4 again. Remote control device of the carbon dioxide arc welding machine characterized in that informed.