KR101643187B1 - Monitoring and evaluation apparatus for real-time arc welding - Google Patents

Abstract

According to an embodiment of the present invention, disclosed is a monitoring and evaluation apparatus for real time arc welding, which comprises: a data measurement unit measuring a welding current or arc voltage during welding in real time; a data treatment unit converting data collected in the data measurement unit to a predetermined data shape to be stored; a programmable logic controller (PLC) control unit controlling the data measurement unit and the data treatment unit; and an input and output unit displaying the data collected in the data measurement unit, and performing a role to receive a command from a user.

Description

TECHNICAL FIELD [0001] The present invention relates to a real-time arc welding monitoring and evaluation apparatus,

Embodiments of the present invention relate to a real-time arc welding monitoring and evaluation apparatus, and more particularly, to an apparatus and method for monitoring and evaluating real-time arc welding using an oscilloscope, And more particularly, to a real-time arc welding monitoring and evaluation apparatus capable of performing welding in real time and confirming the progress of welding in real time.

In the present welding field, rather than whether welding is possible or impossible, welding quality and productivity are becoming important factors in creating added value of the enterprise. In case of producing dancer by using automatic production equipment or robots, Since real-time monitoring of quality is difficult, the importance of automatic quality monitoring, that is, quality monitoring, is increasingly emphasized.

However, in the case of the conventional welding quality monitoring system, limited research is being conducted on the field of welding inside / outside monitoring technology and the appearance inspection of the welding part (welding bead shape and welding defect inspection) system using a vision sensor, It is necessary to develop a system that requires welding monitoring. Especially, in view of the fact that more than 92% of the welding machine industry is a small company with fewer than 20 employees, it is urgent to secure domestic technology.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

Korean Patent Laid-Open Publication No. 2013-0138574

Embodiments of the present invention relate to a real-time arc welding monitoring and evaluation apparatus, and more particularly, to an apparatus and method for monitoring and evaluating real-time arc welding using an oscilloscope, Provided is a real-time arc welding monitoring and evaluation apparatus capable of performing welding and checking the progress of welding in real time.

One embodiment of the present invention is a welding apparatus comprising: a data measuring unit for measuring a welding current or an arc voltage in real time during welding; A data processing unit for converting the data collected by the data measuring unit into a predetermined data format and storing the data; A control unit for controlling the data measuring unit and the data processing unit; And an input / output unit for displaying data collected by the data measuring unit and receiving a command from a user.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

The real-time arc welding monitoring and evaluating apparatus according to the embodiments of the present invention enables automatic welding to be performed by measuring, collecting, and storing input variables (welding current, arc voltage) data by using an oscilloscope during arc welding It is possible to obtain an effect of confirming the progress of welding in real time.

As a result, it is possible to obtain an effect of reducing the mechanical machining that occurs after the welding is finished and improving the productivity.

1 is a front view showing a real time arc welding monitoring and evaluation apparatus according to an embodiment of the present invention.
2 is a block diagram illustrating the real time arc welding monitoring and evaluation apparatus of FIG.
FIG. 3 shows a waveform measurement monitoring screen of the oscilloscope of FIG. 1;

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below, but may be implemented in various forms. In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning. Also, the singular expressions include plural expressions unless the context clearly dictates otherwise. Also, the terms include, including, etc. mean that there is a feature, or element, recited in the specification and does not preclude the possibility that one or more other features or components may be added. Also, in the drawings, for convenience of explanation, the components may be exaggerated or reduced in size. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

FIG. 1 is a front view showing a real time arc welding monitoring and evaluation apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a real time arc welding monitoring and evaluation apparatus of FIG.

1 and 2, a real-time arc welding monitoring and evaluation apparatus 100 according to an embodiment of the present invention includes an input / output unit 110, a data measurement unit 120, a PLC control unit 130, a data processing unit 140).

The input / output unit 110 may display the welding data measured by the oscilloscope 120 and receive a command from the user.

In detail, the input / output unit 110 may include an output unit 111 and an input unit 112.

In detail, the output unit 111 may include a display unit capable of monitoring an arc welding state. The output unit 111 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, A display (3D display), and an electrophoretic display (electrophoretic display), but the scope of the present invention is not limited thereto.

The input unit 112 may mean a means for the user to input data for controlling the real-time arc welding monitoring and evaluation apparatus 100. For example, the input unit 112 may be a keyboard, a key pad, a dome switch, a touch pad (contact type capacitance type, pressure type resistive type, infrared ray detection type, surface ultrasonic wave conduction type, A tension measuring method, a piezo effect method, etc.), a jog wheel, a jog switch, a mouse, and the like, but is not limited thereto. Furthermore, the input unit 112 may further include a system control key for powering the system and an emergency stop, a direction control key for controlling the direction of the welded portion, and the like.

The data measuring unit 120 measures welding current and arc voltage in real time during welding. The real-time arc welding monitoring and evaluating apparatus 100 according to an embodiment of the present invention is characterized by using an oscilloscope as the data measuring unit 120. Hereinafter, the case where the oscillator is used as the data measuring unit 120 will be described in more detail.

The oscilloscope 120 can record, reproduce and analyze waveforms of real-time voltage and current, and has a function of measuring voltage and current over time. The welding current and arc voltage data measurable in the conventional real-time arc monitoring system is 2.5 KHz, but the real-time arc welding monitoring and evaluating apparatus 100 according to the embodiment of the present invention can be applied to a system in which the oscilloscope 120 is applied, It is possible to measure voltages and currents densely and accurately up to 100 MHz, thereby improving the reliability of the MD algorithm using current and voltage. In addition, the oscilloscope 120 installed in the real-time arc welding monitoring and evaluation apparatus 100 according to an embodiment of the present invention may be connected to a gauge of voltage and current of a welding machine so that the waveforms of welding current and arc voltage can be confirmed in real time The effect of improving the accuracy and convenience of monitoring can be obtained.

The digital oscilloscope 120 may include a horizontal control unit 121, a vertical control unit 122, a measurement control unit 123, and a trigger unit 124. The horizontal control unit 121 controls the current or voltage measurement time so that it can be set, and the vertical control unit 122 controls the setting and conversion of the measurement unit. The measurement control unit 123 controls a method of measuring a current or a voltage and a data storage setting, and a trigger unit 124 controls the repeated waveform to be adjustable to a stopped waveform.

3 shows a waveform measurement monitoring screen of the oscilloscope. Referring to FIG. 3, the monitoring screen can scale the result by adjusting the scale, and can store the magnified and reduced result. The time for the waveform is tracked by using the position function, Current, arc voltage) can be found.

The PLC (Programmable Logic Controller) control unit 130 controls the execution of arithmetic operation, logical operation, function operation, adjustment operation and data processing as well as sequence control by creating a program in the programmable logic controller. The real-time arc welding monitoring and evaluation apparatus 100 according to an embodiment of the present invention has an advantage that the control contents can be easily modified and changed by using the PLC control method as compared with the conventional relay control method. In addition, it is easy to maintain and reliable, so it can improve the operation rate of equipment by reducing faults. It has network function, high-speed data processing function and sufficient capacity of data storage function. .

The PLC controller 130 of the real-time arc welding monitoring and evaluation apparatus 100 according to an embodiment of the present invention includes a PLC communication unit, a CPU, an input unit, a position controller, an output unit, a load cell, a base, And may be formed to be capable of controlling the position of the real-time arc welding monitoring and evaluation apparatus 100 through the interlocking of the oscilloscope 120 and the data processing unit 140. The PLC control unit 130 includes a PLC communication unit, a CPU, an input unit, a position control unit, an output unit, a load cell, a base, and a cable. can do. Due to the operation display function and the self diagnosis function of the PLC control unit 130, it is easy to maintain the real-time arc welding monitoring and evaluation apparatus 100 and to improve the reliability of the development equipment by reducing problems caused by hardware contact points The key can have an effect.

The data processor 140 converts the data collected by the oscilloscope 120 into a predetermined data format and stores the converted data. A software system such as CIMON-SCADA may be used as the data processing unit 140, but the present invention is not limited thereto.

In detail, CIMON-SCADA is an industrial automation software system for PC that can operate in Microsoft Window environment. It is a system software with high system speed, open architecture, powerful network function and user convenience. Modern remote monitoring and control systems are generally designed to collect large amounts of data related to the operation of the overall power system, not limited to the operation of more than one particular device, and provide a basic interface for industrial automation. The data collection function is a function that stores the tag value that the user wants to collect in the form of a file. The tag that can be collected is an analog tag and a digital tag. Only when the tag is selected in the database, Collection is possible. Based on these concepts, it is possible to realize real-time data acquisition and collection, database management, trend, report, security system, display editing, one touch play, Ethernet etc. It is possible to configure the system so that the system can be operated reasonably and economically.

Although not shown in the figure, the real-time arc welding monitoring and evaluation apparatus 100 includes a communication unit for transmitting and receiving data to / from an external device via a network, a power source for driving the real-time arc welding monitoring and evaluation apparatus 100, A power supply for supplying power, a database for storing data measured in an oscilloscope in real time, and a connector for enabling connection to an external device.

The real-time arc welding monitoring and evaluating apparatus according to the embodiments of the present invention enables automatic welding to be performed by measuring, collecting, and storing input variables (welding current, arc voltage) data by using an oscilloscope during arc welding It is possible to obtain an effect of confirming the progress of welding in real time.

Accordingly, it is possible to check defects of welds occurring during arc welding in real time, thereby reducing mechanical machining occurring after welding or after welding, and improving productivity.

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 exemplary embodiments, and that various changes and modifications may be made therein without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Real-time arc welding monitoring and evaluation device
110: Input / output unit
111:
11: Input unit
120:
121:
122:
123:
124: Trigger
130: PLC control unit
140:

Claims (5)

A data measuring unit for measuring a welding current or arc voltage in real time during welding;
A data processing unit for converting the data collected by the data measuring unit into a predetermined data format and storing the data;
A PLC (Programmable Logic Controller) control unit for controlling the data measurement unit and the data processing unit; And
And an input / output unit for displaying data collected by the data measuring unit and receiving a command from a user,
Wherein the data measuring unit includes an oscilloscope,
The oscilloscope includes:
A horizontal control unit for controlling the measurement time of the current or the voltage so as to be settable;
A vertical control unit for controlling the setting and conversion of the measurement unit;
A measurement control unit for controlling a measurement method of a current or voltage and a data storage setting; And
And a trigger for controlling the waveform to be adjustable to a stopped waveform. delete delete The method according to claim 1,
Wherein the data processor is a CIMON-SCADA. The method according to claim 1,
Wherein the PLC control unit performs position control of a real-time arc welding monitoring and evaluation apparatus through interlocking of the data measuring unit and the data processing unit.

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