KR20150031706A - Welding quality control system - Google Patents

Welding quality control system Download PDF

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Publication number
KR20150031706A
KR20150031706A KR20130111255A KR20130111255A KR20150031706A KR 20150031706 A KR20150031706 A KR 20150031706A KR 20130111255 A KR20130111255 A KR 20130111255A KR 20130111255 A KR20130111255 A KR 20130111255A KR 20150031706 A KR20150031706 A KR 20150031706A
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KR
South Korea
Prior art keywords
welding
robot
welding quality
voltage
gas flow
Prior art date
Application number
KR20130111255A
Other languages
Korean (ko)
Inventor
이윤재
Original Assignee
이윤재
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이윤재 filed Critical 이윤재
Priority to KR20130111255A priority Critical patent/KR20150031706A/en
Publication of KR20150031706A publication Critical patent/KR20150031706A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/095Monitoring or automatic control of welding parameters
    • B23K9/0956Monitoring or automatic control of welding parameters using sensing means, e.g. optical
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/12Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
    • B23K31/125Weld quality monitoring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/02Carriages for supporting the welding or cutting element
    • B23K37/0282Carriages forming part of a welding unit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/10Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006Power supply
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/10Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1087Arc welding using remote control
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/30Nc systems
    • G05B2219/45Nc applications
    • G05B2219/45104Lasrobot, welding robot

Abstract

The present invention relates to a welding quality control system capable of generally checking a working condition from the start to the end of working of a robot welding device according to welding operation through a graph, easily checking and managing a welding operation state by drawing a state of current, voltage, and gas flow detected in real time as a graph and displaying the same on a screen, promoting the ease and efficiency according to welding quality management by usefully performing welding quality management by automatically determining and displaying the presence or absence of abnormalities of the welding quality and processing quality depending on a setting condition wherein a user directly sets a desired determination section in a graph displayed in a screen, and efficiently managing by storing and searching data by model or by date, by checking the cycle of exchanging or dressing a welding tip required for welding quality management, and by managing the welding quality with respect to a plurality of robot welders in one screen through one main control part to connect PC and PLC.

Description

{WELDING QUALITY CONTROL SYSTEM}
The present invention relates to a welding quality control system, and more particularly, it relates to a welding quality control system capable of displaying a graph of current, voltage and gas flow rate on a screen in real time from the start to the end of a welding apparatus, The present invention relates to a welding quality control system that can easily identify and manage a welding operation state in addition to making it possible to determine and identify an abnormality in welding quality or machining quality with respect to a set condition when the determination section is directly set.
In general, welding equipment with manual, automatic, and robot erosion welding machines are combined with control devices using PLCs (Programmable Logic Controllers) to perform sequence control and quality control of welders.
Welding is a work process in which two or more materials to be welded are welded together and joined together. This is one of the facilities where quality control becomes important.
That is, if the welding equipment is not periodically managed, there is a problem of welding quality such as welding failure or separation of welding part due to omission of a spot or lack of welding strength.
For example, as shown in Fig. 1, robot welding is widely used in automation lines. In the robot welding, a torch nozzle 1 is provided at an end of an arm 4 of a robot 3, and a welding And a tip (7).
When the welding tip 7 is welded, the tip portion of the welding tip 7 is heated and melted. When this phenomenon is repeated, the tip area of the tip widens and the cross-sectional area of contact with the welding material becomes large It is difficult to locally generate heat at a high temperature, which causes problems such as insufficient welding strength can not be maintained even if welding is not performed or welding is performed.
As described above, the welding tip plays a very important role in efficiently performing the welding work, and it is necessary to perform the dressing work process to polish the welded welding tip periodically, and to replace the workpiece when it is difficult to further process the dressing .
To this end, quality control of a welding machine is performed by using a control device using a PLC (Programmable Logic Controller) as described above in a conventional welding facility.
However, PLC is a sequence controller generally used in industry, and can be very useful in general industrial control. However, there is a problem that a separate program must be prepared for welding quality control, and it has a simple hardware control characteristic There is a problem in that it is difficult to acquire information on the current working state because there is a difficulty in checking whether there is an abnormality such as a welding quality or a processing quality, and there is a problem that data storage or retrieval according to the welding work is not easy.
On the other hand, there have been proposed many prior arts such as Korean Patent Laid-Open Nos. 10-2012-0053266 and 10-2013-0034487, but the present invention, which is proposed below, Will have a difference.
Korean Patent Publication No. 10-2012-0053266
Korean Patent Publication No. 10-2013-0034487
The present invention solves and overcomes the above-mentioned problems, and it is possible to display a graph of current, voltage and gas flow rate in real time from the start to the end of the welding equipment operation, When setting the judgment interval directly on the graph, it is possible to identify and identify the abnormality of welding quality or machining quality with respect to the set conditions, and to provide a welding quality management system that can more easily confirm and manage the welding work condition It has its purpose.
The present invention allows a user to set a determination interval and a range, perform a welding quality adherence determination and a welding facility control through a comparison operation, and can set a tip dressing, an exchange counter, a gas flow rate, And to store and retrieve data for each model, and to provide a welding quality control system that enables convenience and efficiency in accordance with the quality control of welding.
An object of the present invention is to provide a welding quality management system capable of managing welding quality for a plurality of robot welding machines in one main control unit.
According to an aspect of the present invention, there is provided a welding quality control system including a robot welding machine including a torch nozzle provided with a welding tip, a current voltage supplier for supplying a current voltage required for the robot welding machine, And a gas sensor for detecting a gas flow rate supplied to the robot welder side; The main control unit is connected to receive data in one direction from the welding equipment and is connected to receive data in both directions from the main control unit. The current value, the voltage value and the gas flow rate supplied to the robot welding unit are displayed, A state display unit for informing whether or not there is an abnormality according to whether or not the welding quality is determined in the welding unit; And a controller for receiving a current value, a voltage value, and a gas flow rate, which are interfaced to enable data communication with the PLC side, from the status display unit and supplied to the robot welder, And a determination range is set in the graph drawn by the user. In addition, when the determination range is set, a comparison operation is performed with a predetermined reference value to determine whether or not there is an abnormality in the welding quality, and when the determination is made, A main control unit including a monitor-integrated PC for generating an alarm through a display unit and controlling a welding facility; Is provided.
At this time, the monitor of the PC is composed of a touch panel; In the PC, the model selection of the robot welder, the tip management and the gas flow rate setting, the graph based on the detection value of the corresponding model, the judgment of the fitting in the setting condition when the user sets the judgment range and judgment range in the created graph, And an application program which is programmed so as to selectively perform search is mounted.
In addition, the status display unit may include a detection value display unit for displaying detected values of current, voltage, and gas flow rate supplied to the robot welding machine; An alarm generating unit for informing an abnormality according to whether or not welding quality is determined based on detected values of current, voltage, and gas flow rate supplied to the robot welding machine; An alarm canceling unit for canceling an alarm issued to the alarm generating unit; Is provided.
Further, the PLC and the PC are connected to each other so as to enable bidirectional data communication through an interface between an Ethernet communication and a serial communication.
In addition, when the welding operation is performed through the robot welding machine, the PC receives the detected values of the current, the voltage, and the gas flow rate supplied from the status display unit to the robot welding machine side in real time and displays the graph on a monitor; If the user sets the determination interval and sets the standard of the voltage and the current in the graph of the voltage, current, and gas flow rate plotted in real time, and determines the determination range, the welding quality And displaying the determination status on a monitor; When an unsuitability judgment is made for the determination section set by the user, an instruction is issued to the status display section to generate an alarm, and an instruction is also issued to the PLC side to control the robot welding machine; To be sequentially executed.
Further, the present invention is characterized in that, in performing a step of drawing a graph through the monitor, a preceding graph of a working time unit range is processed according to a user-specified working time unit using stored data of real-time measured information, And displays it in a linear graph.
According to the present invention, the work state of the robot welding machine from the start to the end of the welding operation according to the welding operation can be entirely confirmed by a graph, and the state of the current, voltage and gas flow rate detected in real time can be displayed on the screen Therefore, it is possible to more easily confirm and manage the state of welding work, and it is possible to automatically determine whether or not the welding quality or machining quality is abnormal according to the setting conditions in which the user manually sets the desired determination section in the graph displayed on the screen, It is possible to carry out the quality control of the welding, and the convenience and efficiency according to the quality control of the welding can be promoted.
The present invention provides usefulness in managing welding quality for a plurality of robot welders in a single screen through a single main control unit connecting a PC and a PLC, It is possible to store and retrieve data by model or by date, thereby achieving the usefulness of being able to manage efficiently.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view for explaining a conventional robot welding facility; FIG.
2 is a schematic diagram for explaining a welding quality control system according to an embodiment of the present invention.
3 is a block diagram showing a welding quality management system according to an embodiment of the present invention.
4 is a detailed view showing a state display section in the present invention.
5 to 8 are views showing a display screen executed through a PC of a main control unit in a welding quality management system according to an embodiment of the present invention.
FIG. 9 is an exemplary diagram for explaining a process of performing an adhesion determination on a determination interval through programming processing in a PC in the present invention; FIG.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described with reference to the accompanying drawings, wherein like numerals denote like elements.
The welding quality management system according to an embodiment of the present invention includes a welding facility, a status display unit 100, and a main control unit 200, as shown in FIGS.
One or more of the above-mentioned welding apparatuses may be provided, and the first to n-th welding apparatuses may be used.
The welding equipment includes a robot welder 10 for carrying out a welding operation including a torch nozzle provided with a welding tip and a current voltage supplier 20 for supplying current and voltage required for welding to the robot welding machine 10 And a gas sensor 30 for checking the supply of gas and checking the gas flow rate when the gas such as carbon dioxide is supplied to the robot welder 10 side.
The status display unit 100 is attached to a welding facility or installed next to the welding facility so that it can receive data in one direction from the welding facility and is connected to the main control unit 200 in a bidirectional manner And is provided in proportion to the number of installation of the welding equipment, and may be represented by the first monitoring box to the nth monitoring box.
The state display unit 100 displays a current value, a voltage value, and a gas flow rate to be supplied to the robot welder 10 side and displays an abnormality according to whether the welding quality is determined in the main control unit 200, A detection value display unit 110 for displaying detected values of the current, voltage and gas flow rate supplied to the robot welder 10, a detection value display unit 110 for detecting the current, voltage and gas flow rate supplied to the robot welder 10 And an alarm canceling unit 130 for canceling the occurrence of an alarm. The alarm generating unit 120 may be configured to notify whether there is an abnormality according to whether the welding quality is determined based on the welding quality.
At this time, the alarm generating unit 120 includes a V / A / GAS abnormal lamp for lighting when an abnormality occurs due to the determination of a current, a voltage or a gas flow rate, a robot origin point for informing the operator of the execution of the robot origin point to the robot welder A tip dressing lamp for informing the operator of dressing of the welding tip of the robot welding machine 10, a tip replacement lamp for informing the operator of the replacement of the welding tip of the robot welding machine 10, and the like.
The alarm generator 120 may be configured to generate an alarm.
The alarm canceling unit 130 may be provided in the form of a button, and the alarm can be automatically released when the robot origin is executed.
The main control unit 200 includes a programmable logic controller (PLC) 210 for controlling the operation of the robot welder 10, an interface for data communication with the PLC 210, And the detected values of the current, voltage, and gas flow rate supplied to the robot welder (10) from the robot arm (100) can be displayed as a graph on the screen. When the user sets the judgment range and the judgment range in the graph, Integrated PC 220 for determining whether there is an abnormality in the welding quality or not according to the result of comparison and generating a corresponding alarm through the status display unit 100 according to whether the welding quality is abnormal or not, .
At this time, the PLC 210 has an interface based on an Ethernet communication, and the PC 220 is connected with an interface based on a serial communication such as RS232, and is configured to enable mutual data exchange through bidirectional data communication.
The monitor of the PC 220 may be an LCD panel or a touch panel. For convenience of operation, a touch panel having an input unit integrally may be more preferable.
The PC 220 may be provided with various program menus for welding quality control. In accordance with the menu selection, the model selection of the robot welder, the tip management and the gas flow rate setting, the graph based on the detected value of the corresponding model, An application program that is programmed so that the user can selectively perform an attachment determination, data storage, search, or the like with respect to an abnormality when the determination range is set by the user is installed.
Hereinafter, the welding quality management that can be implemented through the PC 220 will be described.
5 is a diagram illustrating a display state executed on a PC monitor of a main control unit in a welding quality control system according to an embodiment of the present invention. It shows that it is possible to manage the welding quality and it shows that the user can perform model selection, tip management and gas flow setting, graph processing, data storage, data retrieval, etc. for each model of robot welder managed by menu selection Giving.
6 is a view illustrating a display state executed on a PC monitor of a main control unit in a welding quality management system according to an embodiment of the present invention, including a case where a user selects a [Model Selection] menu, When the model to be operated is selected, the setting condition is automatically loaded, and it is processed to add, delete, modify, and copy the model of the robot welder.
FIG. 7 is a view illustrating a display state executed on a PC monitor of the main control unit in the welding quality management system according to the embodiment of the present invention, including the case where the user selects the [tip management and gas flow setting] menu The user can input the number and the name of the connected welding equipment and set the upper limit and the lower limit of the gas supplied to the robot welding machine. , A dressing counter for the welding tip can be set, and a counter for executing the origin of the robot welding machine can be set.
FIG. 8 is a view illustrating a display state executed on a PC monitor of the main control unit in the welding quality management system according to the embodiment of the present invention, and includes a case where the user selects the [data search] menu. It is executed so that data can be searched for by model or date, and data of voltage / current / gas flow rate according to the model or date is automatically displayed and processed so that whether the welding tip is dressed or exchanged can be checked.
Particularly, FIG. 9 is a graph showing the relationship between a determination range and a determination range of a graph drawn based on a detection value displayed on a PC monitor of a main control unit in a welding quality management system according to an embodiment of the present invention, The PC 220 is moved from the status display unit 100 to the robot welder side of the corresponding model when a welding operation is performed through the robot welder 10 The measured values of current, voltage, and gas flow rate are received in real time, and data is stored, and a graph is drawn on the screen through the monitor. [Refer to 1 screen to 4 screens in FIG. 9]
At this time, after confirming the total work amount through the graph of the voltage, current, and gas flow rate drawn in real time, the user sets the determination interval on the graph (see one screen in FIG. 9) 9), the PC 220 outputs a determination value of the welding quality for the determination period (see three screens in FIG. 9) through a comparison operation with a predetermined reference value, (Not shown) is displayed on the monitor in the form of OK or NG. (See FIG. 9, screen 4)
Here, the determination period can be set to 1 to 20 lines, and the state of the welding quality can be confirmed through output of the determination value for the determination period of each line. (Tip exchange, tip dressing, robot origin, etc.), and the total value for each item. The welding operation as described herein generally means from the start of a single welding operation to the completion of the welding operation.
On the other hand, if the user confirms the graph drawn on the monitor screen and determines that the determination period is set, the PC 220 issues an instruction to the status display unit 100 to generate an alarm, Command to control and manage the robot welder 10.
At this time, the alarm may be an alarm or a lamp lighting, and sometimes an alarm and a lamp lighting may be simultaneously executed.
The PC 220 outputs the current value of the counter (tip exchange, tip dressing, robot origin, etc.) set by the user, instructs the status display unit 100 according to the counter value, To control the alarm and lamp lighting to improve the welding quality efficiency.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. Substitution can be made, which will be within the technical scope of the present invention.
10: Robot welder 20: Current voltage supply
30: gas sensor 100: status indicator
110: detected value display section 120: alarm generating section
130: alarm release unit 200: main control unit
210: PLC 220: PC

Claims (6)

  1. A robot welding machine including a torch nozzle provided with a welding tip, a current voltage supplier for supplying a current voltage necessary for the robot welding machine, and a gas sensor for detecting a gas flow rate supplied to the robot welding machine equipment;
    The main control unit is connected to receive data in one direction from the welding equipment and is connected to receive data in both directions from the main control unit. The current value, the voltage value and the gas flow rate supplied to the robot welding unit are displayed, A state display unit for informing whether or not there is an abnormality according to whether or not the welding quality is determined in the welding unit;
    A PLC for performing sequence control of the operation of the robot welder, and a controller for receiving a detection value of a current, a voltage, and a gas flow rate supplied from the status display unit to the robot welder, And a determination range is set in the graph drawn by the user. When the determination range is set, a comparison operation is performed with a predetermined reference value to determine whether the welding quality is abnormal or not. A main control unit including a monitor-integrated PC for generating an alarm through the control unit and controlling the welding equipment; Wherein the welding quality management system comprises:
  2. The method according to claim 1,
    The monitor of the PC comprises a touch panel;
    In the PC, the model selection of the robot welder, the tip management and the gas flow rate setting, the graph based on the detection value of the corresponding model, the judgment of the fitting in the setting condition when the user sets the judgment range and judgment range in the created graph, And an application program that has been programmed so as to selectively perform search is mounted.
  3. The method according to claim 1,
    The status display unit displays,
    A detected value display unit for displaying a detected value of a current, a voltage, and a gas flow rate supplied to the robot welder;
    An alarm generating unit for informing an abnormality according to whether or not welding quality is determined based on detected values of current, voltage, and gas flow rate supplied to the robot welding machine;
    An alarm canceling unit for canceling an alarm issued to the alarm generating unit; Wherein the welding quality management system comprises:
  4. The method according to claim 1,
    Wherein the PLC and the PC are connected to each other so as to enable bidirectional data communication through an interface between the Ethernet communication and the serial communication.
  5. The method according to claim 1,
    In the PC,
    A step of displaying a current value, a voltage, and a gas flow rate, which are supplied from the status display unit to the robot welder, in real time when the welding operation is performed through the robot welding machine,
    If the user sets the determination interval and sets the standard of the voltage and the current in the graph of the voltage, current, and gas flow rate plotted in real time, and determines the determination range, the welding quality And displaying the determination status on a monitor;
    When an unsuitability judgment is made for the determination section set by the user, an instruction is issued to the status display section to generate an alarm, and an instruction is also issued to the PLC side to control the robot welding machine; To be executed in sequence.
  6. The method as claimed in claim 5, wherein the step of displaying a graph through the monitor comprises processing the preceding graph of the working time unit range according to the working time unit specified by the user using the stored data of the real- So that the welding quality management system displays the welding quality management system.
KR20130111255A 2013-09-16 2013-09-16 Welding quality control system KR20150031706A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170141793A (en) * 2015-11-12 2017-12-26 주식회사 상하이 일렉트릭 뉴클리어 파워 이큅먼트 Robot welding system and its welding method
CN110570285A (en) * 2019-09-12 2019-12-13 王春林 Database building system and method for fitting clothes by fitting robot
KR20200122036A (en) * 2019-04-17 2020-10-27 양병철 Welding monitoring system capable of real time quality evaluation
EP3756813A1 (en) * 2019-06-28 2020-12-30 Illinois Tool Works Inc. Apparatus and systems to determine voltage measurements in welding-type applications
KR102213712B1 (en) * 2019-11-19 2021-02-08 주식회사 비앤케이매크로 System for Monitoring Realtime Welding on Smart Factory
KR20210069896A (en) 2019-12-04 2021-06-14 주식회사 비자림 Machine learning based welding quality management system to find and set the optimum current voltage and welding quality management method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170141793A (en) * 2015-11-12 2017-12-26 주식회사 상하이 일렉트릭 뉴클리어 파워 이큅먼트 Robot welding system and its welding method
KR20200122036A (en) * 2019-04-17 2020-10-27 양병철 Welding monitoring system capable of real time quality evaluation
EP3756813A1 (en) * 2019-06-28 2020-12-30 Illinois Tool Works Inc. Apparatus and systems to determine voltage measurements in welding-type applications
CN110570285A (en) * 2019-09-12 2019-12-13 王春林 Database building system and method for fitting clothes by fitting robot
KR102213712B1 (en) * 2019-11-19 2021-02-08 주식회사 비앤케이매크로 System for Monitoring Realtime Welding on Smart Factory
KR20210069896A (en) 2019-12-04 2021-06-14 주식회사 비자림 Machine learning based welding quality management system to find and set the optimum current voltage and welding quality management method

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