KR101680641B1 - Automatic recording system for welding conditions - Google Patents

Abstract

The present invention relates to a method and apparatus for detecting and calculating welding conditions from the start to the completion of welding for the formation of each welding layer in multi-layer welding and recording and managing the welding condition setting information and the calibration information of the sensor for detecting welding conditions By registering and matching with the management information of the process, the overall management of the welding process is facilitated and the monitoring operation is controlled through the pendant used by the welder, so that it is easy to use and easily recognize the alarm situation. The present invention relates to an automatic welding record automation system in which a high voltage detection value is constructed without using an element to be monitored by using a detection value of a welding current in order to block an incoming high voltage.

Description

[0001] AUTOMATIC RECORDING SYSTEM FOR WELDING CONDITIONS [0002]

The present invention relates to a method and apparatus for detecting and calculating welding conditions from the start to the completion of welding for the formation of each welding layer in multi-layer welding and recording and managing the welding condition setting information and the calibration information of the sensor for detecting welding conditions By registering and matching with the management information of the process, the overall management of the welding process is facilitated and the monitoring operation is controlled through the pendant used by the welder, so that it is easy to use and easily recognize the alarm situation. The present invention relates to an automatic welding record automation system in which a high voltage detection value is constructed without using an element to be monitored by using a detection value of a welding current in order to block an incoming high voltage.

In general, arc welding such as TIG welding (arc welding with TIG welding) records and monitors welding conditions such as welding current, welding voltage, welding time, and heat input to ensure the quality of the welding, An alarm will cause the welding to be stopped or the welding to continue after the cause has been eliminated.

In the case of preheating pre-welding of the base material, which is prone to occurrence of low-temperature cracking, and for starting the welding only when the inter-layer temperature is lower than the proper temperature in the multi-layer welding, Included in the condition and monitored.

In order to monitor such welding conditions, Japanese Patent Registration No. 10-1394994 has compared and analyzed welding conditions and images by real-time photographing of welding transition images and matching welding conditions when welding conditions are detected. Therefore, welding conditions could be clearly identified using the weld transition image.

However, in the actual welding process, it is necessary to calibrate the sensor installed to detect the welding condition at each welding site in order to increase the accuracy, and to set the welding condition every welding site or at the time of welding, When welding, monitoring equipment should also be handled.

However, the patent No. 10-1394994 focuses on the analysis of the welding process to obtain accurate analysis results, but does not consider the overall management of the welding process and the ease of use of the welder.

On the other hand, in the case of arc welding such as TIG (Tungsten Inert Gas) welding, a high frequency high voltage capable of damaging the internal circuit of the monitoring device occurs at the start of welding. In the case of Registration No. 10-1394994 or 10 -0525013 has a pretreatment device for decompressing the high voltage and cutting off the high frequency, so that the monitoring device is protected by safely detecting the welding voltage processed by the pretreatment device.

However, in the above-mentioned prior arts, the pre-treatment device is required to have a device for high-voltage treatment for reducing the high voltage and cutting off the high frequency, and thus there is a risk of damage to the pre-treatment device.

KR 10-1394994 B1 2014.05.08. KR 10-0525013 B1 Oct. 24, 2005.

Accordingly, it is an object of the present invention to provide a welding record automation system which can easily use the monitoring apparatus for a welder who handles welding machines and welding torches by simplifying the overall management of the welding process and can prevent the introduction of high frequency high voltage without directly processing the welding voltage of high frequency, The purpose of the system is to provide.

In order to achieve the above object, the present invention provides a welding record automation system, comprising: management information of a welding process; zero point and span calibration information for a current transformer, a voltage transformer and a temperature sensor; , The pre-determined value for the welding conditions including the preheating temperature, the heat input and the welding speed, and the number of weld layers for the multi-layer welding are set through the user interface. The welding current is detected by the current transformer for each welding layer of the multi- , A welding voltage is detected by a voltage transformer, an interlayer temperature and a preheating temperature are detected by an infrared temperature sensor, a switch is disposed at the front end of the voltage transformer, and a welding current of a predetermined threshold value or more is pre- When the flow is over, the switch is operated to close and the welding voltage is started to be detected. The welding speed and the heat input amount are counted by counting the time A main body (100) for alarming when the welding condition deviates from a suitability determination reference value; And a welding start signal for each welding layer of the multi-layer welding is generated by an operation key and transmitted to the main body 100 to detect or calculate the welding condition for each welding layer, 100 for generating an alarm upon occurrence of an alarm, and outputting an alarm; And a control unit.

The pendant 200 is switched by a user operation key to display a screen for outputting the order of the welding layer and whether or not the welding conditions are suitable, the screen for outputting the detection or calculation value of the welding condition, and the screen for outputting the management information of the welding operation Output box.

The welding record automation system according to the embodiment of the present invention communicates with the main body 100 to collect detection data or calculated values of the welding conditions for each welding layer and form a database, and, instead of the setting made in the main body 100, And a remote terminal (300) for transferring the information.

The welding record automation system according to an embodiment of the present invention includes an external alarm unit 230A connected to the pendant 200 by short range wireless communication to alarm in an alarm condition, A wrist watch type alarm unit worn on the wrist and vibrating at the time of an alarm or a display type alarm unit displaying an alarm status display on the welding face.

According to the present invention configured as described above, the welding process control information, the welding condition setting information, and the sensor calibration information are registered, the main body for monitoring or detecting the welding conditions and the welding start signal are generated, Including pendants where the welder can view the welding condition, the welder can easily use it while handling the welder and the welding torch while maintaining overall control over the welding process.

Further, the present invention controls the detection operation of the welding voltage according to the welding current to block the inflow of the high-frequency high voltage, so that it can be configured without an element for processing the high-frequency high voltage.

Further, the present invention has an advantage that the welder can easily recognize the output screen when monitoring the welding situation with the pendant.

1 is an installation view of a welding record automation system according to an embodiment of the present invention;
Fig. 2 is a block diagram of the main body 100 in Fig. 1. Fig.
3 is a block diagram of the pendant 200;
Fig. 4 shows a setting screen configuration of the main body 100. Fig.
FIG. 5 is a view showing a screen during welding in the monitoring screen of the main body 100; FIG.
Fig. 6 is a screen configuration for displaying the current path after completion of welding in the monitoring screen of the main body 100. Fig.
7 is a graph display screen configuration on the monitoring screen of the main body 100;
8 shows a path inquiry screen configuration on the monitoring screen of the main body 100. Fig.
9 is a data inquiry screen configuration of the main body 100. Fig.
10 is a simplified monitoring screen configuration of the pendant 200;
11 is a detailed monitoring screen configuration of the pendant 200;
Fig. 12 shows a project inquiry screen configuration of the pendant 200. Fig.
13 is a main screen configuration of the remote terminal 300. Fig.
14 is a sensor calibration screen configuration of the remote terminal 300. Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an installation view of a welding recording automation system according to an embodiment of the present invention, FIG. 2 is a block diagram of the main body 100 in FIG. 1, and FIG. 3 is a block diagram of a pendant 200 .

Referring to the drawings, a welding record automation system according to an embodiment of the present invention electrically connects to a welding system for welding a base material 4 to be welded to a welding torch 2 supplied with electricity from a welding machine 1 The system includes a main body 100, a pendant 200, and a remote terminal 300. The welding conditions can be set according to the type of welding actually used among various types of welding In addition, welding conditions can be set for each project related to the base material 4, so that it can be operated in accordance with various welding conditions and quality can be guaranteed.

The main body 100 includes a voltage and current detection unit 120 for detecting a welding voltage and a welding current applied to the welding torch 2 during welding conditions, a voltage and current detection unit 120 for detecting the voltage and current, A user interface 140 for providing a UI (user interface) environment in which a user can use the main body 100, an interface 130 for converting a detection signal of a welding condition to a digital signal processing in the microprocessor 110, A first communication unit 170 for communicating with the pendant 200 and a remote terminal 300. The first communication unit 170 communicates with the pendant 200. The first communication unit 170 communicates with the pendant 200, A second communication unit 180 for communication with the pendant 200 to control the overall operation of the main body 100 and to record welding conditions and to alarm and record the recorded welding conditions when an alarm situation occurs And a microprocessor 110 that performs the functions of the present invention. Each component will be described in more detail as follows.

The voltage and current detecting unit 120 inputs a welding voltage applied to the welding torch 2 from the welding machine 1 to the voltage transformer 123 through the voltage measuring cable 11, The welding current is inputted to the welding machine 123 and is connected to the welding machine 1 so as to receive the welding current denatured through the current transformer 10. When the welding current is detected and the predetermined threshold value or more is continued for a predetermined time or longer, 122 are closed to input a welding voltage to the voltage transformer 123 and detected as a voltage value modified by the voltage transformer 123 to transmit a welding current and a welding voltage signal to the interface 130. At this time, the welding current detected before the start of the detection of the welding voltage is transmitted to the interface 130 to be monitored. By providing the voltage / current detecting unit 120 as described above, the high frequency high voltage generated at the start of welding is cut off, thereby preventing subsequent components following the interface 130 from being damaged by the high frequency high voltage.

For example, according to Tig Welding, a base material is welded by melting arc welding between a tungsten electrode, which is a non-consumable electrode, and a base material, and a high voltage gradient required for arc discharge is generated at the time of arc- A method of applying a high voltage is mainly used. If the high frequency high voltage applied for the arc start is modified by the direct voltage transformer 123, the subsequent interface 130 and the microprocessor 110 as well as the voltage transformer 123 may be damaged.

However, since a high voltage is generated as an impulse signal in the transient state of the arc start, a normal arc is generated under the low voltage after the arc start, and at the same time, the current gradually increases to the current size when a normal arc occurs during arc start. The transient section in which the high frequency high voltage is generated can be discriminated as the current detection based on the waveform characteristic change of the current. That is, the time when the high frequency high voltage becomes the low voltage of the normal arc discharge is discriminated as the increase of the current and the current duration of the certain level or more, thereby the high frequency high voltage is cut off and the safe voltage after the discrimination time is denatured and detected.

Here, in order to detect the end point of the high-frequency high voltage, the threshold value set in advance for the current can be set to a value obtained by multiplying the welding current flowing under the low voltage at the time of occurrence of the normal arc after the arc start by a certain ratio. The denaturation of the voltage and the current is performed by modifying the interface 130 with an appropriate voltage and current signal that is set in advance so as to be converted into a digital signal.

The interface 130 receives the welding current signal and the welding voltage signal detected by the voltage current detection unit 120, and converts the same into a digital signal. In addition, in multi-layer welding, it is possible to connect with the temperature sensor 12 which detects the interlaminar temperature or the preheating temperature of the base material so that the detected temperature signal can be inputted and the flux can be inputted in the welding type using the flux Humidity sensor 13 for detecting the temperature and the humidity in the hopper, thereby receiving the detected temperature and humidity signal, and when receiving the inter-layer temperature, the pre-heating temperature or the temperature / humidity signal, And then transmits it to the microprocessor.

Here, the temperature sensor 12 for detecting the interlayer temperature or the preheating temperature is constituted by an infrared temperature sensor which can detect the temperature more easily than a contact-type temperature sensor for detecting the temperature by contacting the probe to the temperature measurement site. A structure that can be fixed to the welding torch 2 for convenience of welding or a structure that can be fixed to the following pendant 200 used for carrying out welding work. In addition, the temperature sensor 2 may include a pointer for visually showing a temperature measurement position by irradiating light, so that the temperature can be detected by accurately indicating the measurement position by adjusting the direction of the pointer.

The user interface 140 is provided to allow a user to select and view a screen exemplarily shown in FIGS. 4 to 9 below, and to input the screen if necessary. However, in order to prevent damage by the spatter, the display window showing the screen is fixed with a hinge to fix the transparent plastic plate so as to be able to see the screen in a state in which the display unit is covered and removed, I can do it.

The hard disk 150 is a data storage space that stores welding condition data obtained by storing or detecting project items or setting registration data received through the user interface 140 or transmitted from the remote terminal 300, And stores various information including the determination result of suitability of the welding process by an instruction of the microprocessor 110. [

The alarm unit 160 is controlled by the microprocessor 110 when an incompatibility condition occurs in the result of the suitability determination of the welding process. The alarm unit 160 may include an alarm lamp or an alarm speaker, for example.

The first communication unit 170 is connected to the pendant 200 to interlock the main body 100 with the pendant 200. Herein, the interlocking operation is performed by transmitting information requested by the pendant 200 and outputting the information to the screen of the pendant 200, and an operation of passing the pass switching signal through the pendant 200 And starting monitoring of the path.

The second communication unit 180 is connected to the remote terminal 300 to transmit or receive data.

The microprocessor 110 controls the overall operation of the main body 100 and will be described with reference to the output screens shown in FIGS.

FIG. 4 shows a configuration of a setting screen, FIG. 5 shows a screen configuration during welding in a monitoring screen, FIG. 6 shows a screen configuration after a current pass is welded in a monitoring screen, FIG. , FIG. 8 shows the path inquiry screen configuration in the monitoring screen, and FIG. 9 shows the data inquiry screen configuration.

The microprocessor 110 is equipped with a monitoring process, a data inquiry process and a setting process. On the screen of the user interface 110, a monitoring menu 100-1, a data inquiry menu 100-2, ) As a main menu at the top, and executes a process corresponding to the selected menu.

First, when the setting menu 100-3 for project management and welding condition setting is selected, the setting process is executed to output the setting screen shown in Fig.

Items to register (input, select, or modify) the project management information, the welding management information, the welding condition information, and the sensor calibration information are displayed on the setting screen.

Here, the project management information includes the items of the product to be produced by the welding and the name of the company commissioned for production, and the welding management information includes the base material, the welding length, the welding number (the number of welding layers in the multi- : welding procedure specfication), etc. The project management information and the welding management information are provided by assigning a control number to the products produced by the welding work of the base metal and including the requirements for the welding work, It corresponds to process management information.

Welding condition information includes the preheating temperature lower limit, interlayer temperature upper limit, welding current upper / lower limit, welding voltage upper / lower limit, welding speed upper / lower limit, and heat input upper limit.

The sensor calibration information is used to detect a signal sensed by a sensor (a current transformer, a voltage transformer, a temperature sensor, a hopper hygrometer) at the interface 130 and obtain a zero value or a span calibration the calibration value is included in the setting screen configuration as required for calibration, and the calibration value can be input for every sensor signal that can be received through the interface 130. [ In the embodiment of the present invention, since it is configured to connect the voltage, current, and temperature sensors, it includes items for inputting values of voltage calibration, current calibration, and temperature calibration. In addition, since the current transformer 10 is often replaced with a product having an appropriate denitration ratio according to welding conditions, it is possible to input the current denaturation ratio of the changed current transformer 10.

Upon receiving each item of the setting screen, the setting process stores the project management information, the welding management information, the welding condition information, and the sensor calibration information in the hard disk 150.

As for the sensor calibration information, if it is possible to calibrate the sensor by adjusting the adjustment value of the internal elements constituting the interface 130 (for example, the adjustment value in the case of zero point and span adjustment by adjusting the variable resistance and the amplification ratio) The interface 130 can be calibrated in accordance with the sensor calibration information and the microprocessor 110 can programmatically calibrate the sensing value delivered via the interface 130 according to the sensor calibration information have.

Meanwhile, the remote terminal 300 can also execute the setting process. When the remote terminal 300 is set up, the remote terminal 300 receives information set by the remote terminal 300.

After the setting as described above, the monitoring process is executed to prepare for monitoring. The sub menu displayed on the screen by the execution of the monitoring process includes a current welding status menu (100-11) showing the data value, a graph menu (100-12) showing the sensing value as a graph, And a previous path inquiry menu 100-13 showing the data.

The multi-layer welding is a process of forming a plurality of welding layers by repeating a predetermined number of times of welding. The welding for forming each welding layer is referred to as a pass welding, and the maricrow processor 110 Pass welding is separated and monitored.

When the microprocessor 110 receives the path switching command from the pendant 200, the microprocessor 110 starts to detect the sensor signal (current transformer, voltage transformer, temperature sensor, hopper thermometer) through the interface 130, After confirming that the preheat temperature and the intertemporal temperature detected by the sensor 12 deviate from the set value, if a deviation from the set value is detected, a signal informing the welder thereof is outputted to the alarm unit 160 or transmitted to the pendant 200, Do not pass welding. That is, after the preheating temperature and the interlayer temperature become the set values, the welding of the pass to be performed is proceeded.

When the preheating temperature and the interlayer temperature meet the set value, the welding proceeds, so the time starts to be counted and the detected value is displayed on the screen during welding shown in FIG. 5 in real time. 5, the welding current sensed by the current transformer 10, the welding voltage sensed by the voltage transformer 123, and the inter-layer temperature sensed by the temperature sensor 12 are displayed in real time, and the set upper / Value, project management information, and weld management information. 5, when the hopper temperature and hygrometer 13 is used, the temperature and humidity of the hopper are also displayed in real time.

In addition, the monitoring process executed by the microprocessor 110 may be performed in real time by calculating the input heat quantity and the welding speed, which are welding conditions other than the sensing value detected by the sensor, in real time according to the count time, And monitors whether the set value is deviated from the set value. If the set value is out of the set value, the alarm unit 160 is alarmed. If it is set to upper limit / lower limit, it monitors whether it is out of the range between upper limit and lower limit, monitors whether it is larger than upper limit when it is set as upper limit, and monitors whether it is lower than lower limit when it is set as lower limit. Although not shown in the drawings, when the value is set to a value without upper / lower limit, it may be monitored whether the set value deviates from a predetermined error range. According to the set value and the comparison result, a signal for notifying the alarm condition is also transmitted to the pendant 200.

When the monitoring process executed by the microprocessor 110 detects that the welding of the current path is completed from the change of the sensed voltage or current value, the welding result of the current path is outputted as the screen shown in FIG. Referring to FIG. 6, the required time and speed (the speed obtained by the correlation between the welding distance set value and the required time) of the current welding completed path are output together with the project management information and the welding management information. Then, the welding condition data detected or calculated for the completed pass welding is stored in the hard disk 150 so as to be divided by the pass number.

Here, referring to FIG. 6, the number of remaining passes in the multi-layer welding can be known by outputting the set number of total passes and the current pass number.

Thereafter, when the path switching command is received again from the pendant 200, monitoring is performed as described above for restarting pass welding.

According to the present invention, as shown in FIGS. 5 and 6, not only the data for each path can be viewed as values, but also the graph menus 100-12 and When the graph menu 100-12 is selected, the sensing value detected by the sensor is output as a graph as shown in FIG. 7, and the previous path inquiry menu 100-3 is displayed. , The data for the path executed before the current path is outputted as a list of the path numbers.

When the welding is repeated for the total number of passes according to the path switching command, the alarm unit 160 outputs the signal to the pendant 200 indicating that the welding has been performed for the total number of passes.

Then, the data inquiry menu 100-2 is selected to allow the data of the entire path to be viewed as a list.

In addition, the microprocessor 110 transmits the welding condition data detected or calculated for each pass to the pendant 200 in real time while executing the monitoring process, switches the monitoring screen from the pendant 200, Or when a project inquiry request is generated, information about the corresponding request is transmitted. The microprocessor 110 transmits the detected or calculated welding condition data to the remote terminal 300 in real time and stores the data in the hard disk 150 so that data can be inquired, And transmits it when it is in a normal communication state with the remote terminal 300 after storing it safely.

3, the pendant 200 includes a user interface 220 as a user interface (UI), an alarm unit 230 for alarming, a first communication unit 240 for communicating with the main body 100, a temperature sensor A short distance communication module 260 composed of a Bluetooth, a ZigBee or a WiFi module, and a controller 210 for controlling the operation of the pendant 200.

The pendant 200 is a component for showing the welding situation to the welder where the welding work is carried or worn or the automatic welding machine is mounted on the welding torch where the welding operation is performed. The pendant 200 is a temperature for measuring the interlayer temperature and the preheating temperature By connecting the sensor 12 to the pendant 250, the use of the temperature sensor 12 is made convenient. A cable for electrically connecting a connector connected to the temperature sensor 12 to the main body 100 is additionally provided between the pendant 200 and the main body 100, And the sensor 12 is connected to the main body 100.

The user interface 220 includes a display language and various keys, and the key includes a path switching key for indicating a start of a path and a screen switching key for switching a screen to be output to a display language. The pass switch key is a key for instructing the start of formation of each welding layer in the multi-layer welding. When the pass welding for one time pass is finished and the welding is stopped, And that the welding has started.

When the path switching key is pressed, the control unit 210 causes the main body 100 to start the monitoring operation for alias current path welding that the pass welding is started. Of course, the welder detects the pre-heating temperature and the inter-layer temperature by the temperature sensor 12, and when the body 100 is determined to be an appropriate temperature, the welding operation is performed by pressing the path switching key. If it is out of the set value, it will be alarmed so that the welding will be stopped and wait or it will be at the proper temperature.

10, the control unit 210 receives the data on the current pass welding from the main body 100 monitoring the execution of the monitoring process in real time, and displays a brief monitoring screen showing simple information as shown in FIG. 10, The detailed monitoring screen showing the upper limit information is output according to the operation of the screen switching key.

Referring to FIG. 10, there is shown a screen configuration in which the order of the current pass, the time required for the current pass welding, the preheat temperature, the suitability of the temperature between the layers, and the suitability of the voltage and current are shown. 11, detailed information on the current pass welding can be confirmed in real time by showing the lower limit set value of the preheat temperature, the upper limit set value of the interlayer temperature, the upper limit / lower limit value of the welding voltage and the welding current, have.

In addition, a part of the management information (the project related information and the welding management information) of the welding process shown in Fig. 12 can be confirmed by the operation of the screen switching key. In other words, the screen configuration shown in FIGS. 10 to 12 is configured such that the main information selected from the project management information, the welding management information, and the welding condition information shown in the screen configuration during welding shown in FIG. 5 is changed from the pendant 200 to the screen .

The control unit 210 alerts the alarm unit 230 when the alarm signal is received from the main body 100 and outputs the alarm signal to the external alarm unit 230A when the external alarm unit 230A is connected to the local communication module 260. [ The alarm signal is transmitted to an alarm.

Here, the external alarm unit 230A is a wrist watch type alarm unit that is worn on the wrist and includes a vibration element and a short-range communication module to vibrate at an alarm, or a display or lamp and a short- A display-type alarm unit including a display-type alarm unit. In the case of the display type alarm part, since the alarm situation is displayed on the welding face protecting the eyes and the face from the strong light of the flame or heat when welding, the welder can easily recognize even during welding. For example, the display-type alarm unit may be fixed on one side of the welding surface to allow the welder to come into view of the welder wearing the welding surface or to project the alarm image on the welding surface, I will.

The remote terminal 300 is connected to the main body 100 installed one by one at the welding work site where welding is performed with the welding machine 1 and the welding torch 2 so as to collect data transmitted from each main body 100 13, which is capable of registering monitoring, setting, and project management information as shown in the main screen shown in FIG. 13 and having a user interface, and is connected to each of the sensors 100 Voltage transformer, current transformer, temperature sensor) can be set.

Referring to the main screen shown in Fig. 13, the remote monitoring / setting menu 300-1, the project management menu 300-2, the data inquiry menu 300-3, and the equipment sensor calibration menu 300-4 are displayed You can choose.

The project management menu 300-2 registers, modifies and deletes the project management information, the welding management information, and the welding condition information, and displays each information in a hierarchical manner.

The remote monitoring / setting menu 300-1 provides the combined screen of FIG. 4 and FIG. 5 for the individual main body 100 to enable monitoring and setting of the individual main body 100. FIG. Among the information to be set here, the sensor calibration information is separately inputted / corrected by the equipment sensor calibration menu 300-4.

The data inquiry menu 300-3 provides various submenus for retrieving and inquiring data collected from the individual main body 100, respectively.

The apparatus sensor calibration menu 300-4 is a menu for inputting the sensor calibration information described with reference to FIG. 4. When the main body 100 is selected and this menu is selected, the screen shown in FIG. 14 is displayed. 14, the temperature sensor calibration information 300-41, the current transformer calibration information 300-42, and the voltage transformer information 300-43 are output to the top, and the setting screen of the calibration information for each sensor 300-44) is output at the lower end.

If the calibration information setting screen 300-44 is examined in detail, the upper and lower limits of the range of values to be output with respect to the upper and lower limits of the measurement range can be inputted for each type of sensor. The slope and the Y intercept on the graph of FIG. At this time, the slope and Y intercept are values corresponding to the span and the zero point of the sensor, respectively. Also, if any one of the sensor list is selected, the slope and Y intercept of the selected sensor are output to the top.

The sensor calibration information thus set is included in the setting information of the corresponding main body 100 and is applied to the main body 100 during the monitoring operation.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, . ≪ / RTI > Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

1: Welding machine 2: Welding torch 3: Hopper 4: Base material
10: current transformer 11; Cable for voltage measurement
12: Temperature sensor 13: Hopper hygrometer
100:
110: Microprocessor 120: Voltage &
130: interface unit 140: user interface unit
150: Hard disk 160: Alarm unit
170: first communication unit 180: second communication unit
200: Pendant
210: control unit 220: user interface unit
230: Alarm part 230A: External alarm part
240: first communication unit 250: connector
260: Local area communication module
300: remote terminal 310: database

Claims (4)

delete Welding process management information, zero point and span calibration information for current transformer, voltage transformer and temperature sensor, welding current, welding voltage, interlayer temperature, preheat temperature, heat input and welding speed The determination reference value and the number of welding layers of the multi-layer welding are set through the user interface, the welding current is detected by the current transformer for each welding layer of the multi-layer welding, the welding voltage is detected by the voltage transformer, A switch is disposed at the front end of the voltage transformer, and when the welding current of a predetermined threshold value or more flows at a predetermined time or more at an initial stage of welding of each welding layer, the switch is closed to start detecting the welding voltage, A main body 100 for counting the welding speed and the amount of heat input and for alarming when the welding condition is out of the conformity determination reference value;
A component for showing the welding situation to the welder where the welding operation is performed by interlocking with the main body 100 by attaching the welding torch to the welding torch in the case of a welding worker who carries out the welding operation or an automatic welding machine, And transmits the welding start signal to the main body 100 to detect or calculate the welding condition for each welding layer. The welding condition and the welding condition are received from the main body 100, A pendant 200 for outputting an alarm and generating an alarm upon occurrence of an alarm;
, ≪ / RTI >
The main body 100 starts to detect or calculate the welding condition for the welding of the current welding layer when receiving the welding start signal and detects when the welding of the current welding layer is completed from the change of voltage or current, According to the signal, the welding condition for each welding layer is acquired,
The temperature sensor 12 is connected to the pendant 200 to transmit the detected preheat temperature and the detected temperature to the main body 100 through the pendant 200,
The pendant 200 switches a screen for outputting the order of the welding layer and whether or not the welding conditions are suitable, a screen for outputting the detection or calculation value of the welding condition, and a screen for outputting the management information of the welding process Output bin. 3. The method of claim 2,
A remote terminal (300) communicating with the main body (100), collecting detection or calculation values of welding conditions for each welding layer, forming a database, and transmitting the database to the main body (100) instead of the setting made in the main body (100);
And a welding system for welding a workpiece. The method of claim 3,
And an external alarm unit (230A) connected to the pendant (200) by short-range wireless communication to alarm in an alarm condition,
Wherein the external alarm unit 230A comprises a wristwatch type alarm unit worn on the wrist and vibrated during an alarm or a display type alarm unit displaying an alarm status indication on the welding surface.

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