KR100478353B1 - A Device for Controlling Spot/Projection Welding Machines of Condenser Type - Google Patents

Abstract

The present invention relates to a control device of a condenser type spot / projection welding machine capable of performing welding by welding conditions according to various welding materials. An operation unit 20 for setting and displaying a set welding condition and an operating state of the welding machine; The ROM 43 is integrally coupled with the operation unit 20 and stores a control program for controlling a welding operation according to a welding condition setting of the operation unit 20, and a control program stored in the ROM 43 is executed. RAM 45, which is a work space to be operated, a central control unit 41 which controls a welding operation by executing a control program stored in the ROM 43 by setting welding conditions of the operation unit 20, and a working time of a welding machine. Timer 47 for measuring the number, counter 49 for measuring the production amount of the welding machine, AD converter 53 for converting the AC power supplied from the external power supply to the DC power required by the control device is provided Control board 40, comprising a control device for controlling a condenser type spot / projection welding machine, the control board 40 is to reduce the error generated during the welding operation of the condenser type spot / projection welding machine The charge / discharge control unit 55 which charges or discharges the capacitor of the welding machine by detecting a signal transmitted from the central control unit 41 according to the error detecting unit 51 and the welding condition set by the operation unit 20. And a welding control unit 57 for operating or terminating the welding operation of the welding machine according to the operation signal of the central control unit 41, and a pressure control unit 59 for controlling the operation of the welding machine pressing unit for pressing the object to be welded. It is done.

Description

Control Device for Condenser Spot / Projection Welder {A Device for Controlling Spot / Projection Welding Machines of Condenser Type}

The present invention relates to a control device of a condenser type spot / projection welding machine, and more particularly, a control board having a built-in program capable of performing welding by welding conditions according to welding conditions or welding materials is provided to provide an optimal program according to various welding. The present invention relates to a welding machine control device configured to perform welding by selecting, to facilitate adjustment and setting of a charging voltage, and to be made of a touch panel type to facilitate operation of a control device.

The conventional condenser type spot / projection welding machine (Spot / Projection Welding Machines of Condenser Type) control device receives a signal from a variety of sensors to send a signal to the control device so that the welder operates in a predetermined state. A programmable logic controller (PLC) type or relay type was used.

In particular, such a conventional control device has a large size in a non-memory analog format, and once installed, has a disadvantage in that it is impossible to input a plurality of welding conditions or output voltages. Therefore, it is impossible to set the conditions according to the type of welding material or the respective conditions, and despite the use of expensive welding machines, the use area is limited, thereby limiting its usefulness.

In particular, as the industrial conditions changed due to the small quantity production system of various kinds, it was necessary to apply welding conditions that can be applied to various conditions and materials and devices with a single welding machine. There was an impossible problem.

The present invention has been made to solve the problems of the conventional control device of the conventional condenser spot / projection welding machine, and the present invention provides a variety of welding conditions, that is, the use and control of various kinds of welded objects and welding time and charging voltage. The objective of this invention is to provide a control device for condenser spot / projection welding machines suitable for a large quantity production system.

In addition, the present invention, the welding situation of the welding machine is displayed digitally and the control unit of each control device is made of a touch panel type to improve the ease of operation that the user can easily operate according to the welding conditions, monitoring and welding conditions of the welding machine from time to time Another object is to provide a control device for a condenser spot / projection welding machine that can be identified.

In order to achieve the above object, a control apparatus of a condenser type spot / projection welding machine according to the present invention includes: an operation unit for setting welding conditions of a welded object to be welded and displaying a set welding condition and an operating state of the welder; A ROM, which is integrated with the operation unit and stores a control program for controlling a welding operation according to the welding condition setting of the operation unit, a RAM that is a work space for executing the control program stored in the ROM, and the welding of the operation unit. Controls the welding operation by executing the control program stored in the ROM by setting the conditions, timer for measuring the working time of the welding machine, counter for measuring the output of the welding machine, and controlling the AC power supplied from the external power source. And a control board having an AD converter for converting and supplying the DC power required by the apparatus. The control apparatus for controlling a condenser type spot / projection welding machine comprising: welding a condenser type spot / projection welding machine to the control board. An error detection unit for detecting an error generated during operation, and the operation unit A charge / discharge control unit which senses a signal transmitted from the central control unit according to a welding condition set by the controller, and charges or discharges a capacitor of the welding machine; a welding control unit which operates or terminates the welding operation of the welding machine according to an operation signal of the central control unit; A pressure control unit is provided to control the operation of the welder pressurizing unit to pressurize the object to be welded. It is preferable to include a cooling water error detection unit for detecting, and an air error detection unit for detecting an error of the air pressure used to pressurize the object to be welded.

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

1 is an external view of a welder control apparatus according to the present invention.

The welding machine control apparatus of the present invention is installed on one side of a condenser type spot / projection welding machine to control the welding operation of the welding machine. As shown in FIG. 1, the main body 10 of the welding machine control apparatus is formed of a box. A control board for controlling the operation of the welding machine is provided inside the main body 10, and a touch panel for setting the welding conditions of the welding machine and displaying the set welding conditions and the operating state of the welding machine on the outer front of the main body 10. An operation unit 20 made of a type is provided.

Figure 2 is a schematic block diagram of a control board provided inside the welding machine control apparatus according to the present invention.

As shown in FIG. 2, the control board 40 of the welding machine control apparatus of the present invention includes a ROM (Read Only Memory) 43 in which a control program for controlling the operation of the welding machine is stored, and in the ROM 43. RAM (Random Access Memory) 45, which is a work space for executing the stored control program, and the control program stored in the ROM 43 are drawn out to the RAM 45 by setting welding conditions of the operation unit 20. The central control unit 41 for controlling the welding operation of the welding machine, the timer 47 for measuring the working time of the welding machine, the counter 49 for measuring the amount of work of the welding machine, and the welding machine controlled by the welding machine controller. Error detection unit 51 for monitoring the operation, AD converter (AC to DC Converter) 53 for converting and supplying the AC power supplied from the external power supply source to the DC power required by the welding machine controller, and the operation unit Welding condition set by 20 Accordingly, the charge / discharge control unit 55 which detects a signal transmitted from the central control unit 41 to charge or discharge the capacitor of the welding machine, and operates or terminates the welding operation of the welding machine according to the operation signal of the central control unit 41. The welding control part 57 and the pressure control part 59 which control the operation | movement of the welding machine press part which pressurizes a to-be-welded object are comprised.

According to an embodiment of the present invention, the control program stored in the ROM 43 may be divided into eight types of welding conditions such as welding voltage and welding time according to the material, thickness, welding strength, and the like of the welded object to perform welding according to each condition. It was configured to be. These welding conditions are set by the operation unit 20, so that the central control unit 41 controls the welding machine to perform welding in accordance with the set welding conditions. The welding conditions are classified according to the welded object that is most used for welding, which can be changed by configuring a control program according to the object to be welded.

The error detecting unit 51 is for detecting an error generated during the operation of the welding machine, and includes an overvoltage error detecting unit 51a for detecting an overvoltage supplied to the capacitor of the welding machine, and cooling water used for the welding machine. Cooling water error detection unit 51b for detecting the abnormality of the) and the air error detection unit 51c for detecting the abnormality of the air (Air) pressure used to pressurize the object to be welded. If an error is detected by the error detecting unit 51, the error detecting unit 51 displays the warning on the operation unit 20.

The charge / discharge control unit 55 serves to control voltage charging and discharging of the capacitor provided in the condenser type spot / projection welding machine, and the welding control unit 57 controls the welded object through the voltage charged in the condenser of the welding machine. It serves to control the welding operation of the welder to be welded, the pressure control unit 59 serves to control the pressing operation of the welder to pressurize the object to be welded. The charge / discharge control unit 55, the welding control unit 57, and the pressure control unit 59 transmit the charge / discharge signal, the welding signal, and the pressurization signal to the welder under the control of the central control unit 41, respectively. In this case, pressurization can be carried out.

3 is a front view of an operation unit of the welding machine control apparatus according to the present invention.

As shown in FIG. 3, the operation unit 20 includes a welding condition number display unit 21 in which a serial number is displayed according to a welding condition to be set, and a welding voltage applied to a welded object through a voltage charged in a condenser of a welding machine. The welding voltage display section 22 to be displayed, the pressurization time display section 23 for displaying the time to pressurize the object to be welded, the welding time display section 24 for displaying the welding time, and the material and thickness of the welded object The welding condition setting unit 25 to set the condition, the charging completion display unit 26 to be displayed when the capacitor of the welding machine is completed, and the capacitor for charging or discharging the charged voltage to the capacitor of the welding machine. Set and display the charge / discharge selection operation unit 27, the warning display unit 28 which is turned on when an error occurs during the welding operation of the welding machine according to the welding conditions, and the production amount produced by the welding of the welding machine. It comprises a production counter operation section 29, and a condition-specific work operation for operating a welding machine according to the welding conditions set switch 31, a power supply switch 32 for supplying power to the welding machine control equipment.

The welding condition setting unit 25 allows to set welding conditions such as welding voltage, welding time, etc. according to the material, thickness, welding strength, and the like of the welded object. The welding condition setting unit 25 is programmed according to the welded object. A program selection button 25a capable of selecting welding conditions, up, down, left, right movement buttons 25b, and trial buttons 25c are provided. When the welding condition is set by the welding condition setting section 25, the welding condition number display section 21 displays the welding condition number corresponding to the welding condition, and the welding voltage display section 22 shows the welding voltage and the pressurization time. Pressing time is displayed on the display section 23, and welding time is displayed on the welding time display section 24, respectively.

The condition-specific operation switch 31 includes a welding start button 31a for performing welding according to the set welding condition, a test button 31b for testing the welding once according to the set welding condition, and pressure on the object to be welded. A pressing button 31c for applying a is provided.

Hereinafter, the welding machine control apparatus of the present invention having the above-described configuration controls the condenser type spot / projection welding machine to describe a process in which welding is performed.

4 is a view illustrating a process in which a user controls a welder through a welder control apparatus according to the present invention. The process is as follows.

Step S110: The user first turns on the power supply switch 32 of the operation unit 20 to control the operation of the welding machine through the welding machine control device. When the power supply switch 32 is turned on, the welder control device is supplied with the DC-converted power through the AD converter 53.

Step S120: The user sets welding conditions such as welding voltage, welding time, etc. according to the welded object through the welding condition setting unit 25. According to the welding condition setting, the corresponding condition number is displayed on the welding condition number display unit 21, and the corresponding value is displayed on the welding voltage display unit 22, the pressurization time display unit 23, and the welding time display unit 24.

Step S130: The production amount to be produced by welding through the production counter operation unit 29 is set. At this time, the preset production amount can be set and changed through the set button and the reset button.

Step S140: Select the charge button of the charge and discharge selection operation unit 27 to charge the corresponding voltage set in the capacitor of the welding machine.

Step S150: When the charging of the voltage set in the capacitor of the welding machine is completed, the charging completion display unit 26 indicates that the charging is completed.

Step S160: It is determined whether to pressurize the test before proceeding with welding.

Step S161: When the pressure test is performed, the pressure test is performed by selecting the pressure button 31c of the conditional operation switch 31.

Step S162: Determine whether to change the welding pressure (pressure) during the welding condition according to the pressure test result.

Step S163: When the welding pressure is changed, after resetting the welding pressure through the conditional operation switch 31, the process returns to the step S160 and proceeds thereafter.

Step S170: Determine whether to proceed with the welding test. In the embodiment of the present invention, the welding test is performed once according to the set welding conditions.

Step S171: When the welding test is to be performed, the test button 31b of the conditional operation switch 31 is selected to perform the welding test.

Step S172: Determine whether to change the welding condition according to the welding test result.

Step S173: When the welding condition is changed, after resetting the welding condition through the conditional operation switch 31, the process returns to the step S160 and proceeds thereafter.

Step S180: It is determined whether to proceed with the actual welding operation.

Step S181: When the welding operation is to be performed, the welding operation is selected by selecting the welding button 31a of the conditional operation operation switch 31. The welding operation is continuously performed by checking the set welding voltage, welding time, and production quantity.

Step S182: While the operation is in progress, the error detecting unit 51 continuously detects whether an error occurs during the operation.

Step S183: The error detection by the error detection unit 51 proceeds through overvoltage check, coolant check, air pressure check, etc. during welding operation of the welder, and if an error occurs, the warning display unit 28 of the operation unit 20 is removed. The error is displayed.

Step S184: Resolve the error situation that occurred. In the case of overvoltage, the overvoltage problem is solved through discharge, and the failed cooling water is replenished with new cooling water, and the air pressure is appropriately changed.

Step S185: The welding operation is repeatedly performed according to the set welding condition, and when all the production is completed according to the set production amount, the welding operation is finished.

Through the above process, the user can control the condenser type spot / projection welding machine by manipulating the operation unit 20 of the welder control device according to the welding condition of the welded object.

As described above, the control device of the condenser type spot / projection welding machine according to the present invention performs the welding operation of the welding machine by setting the operation unit and the operation unit which can set the welding conditions according to the type, thickness, welding strength and the like of various welded objects. Through the control board to control it is effective to weld the welded material of various materials and thickness with a single welder.

In addition, the welding status of the welding machine is digitally displayed in the conditional part, and the operation part of each control device is a touch panel type, which improves the user's convenience for easy operation according to the welding condition, and monitors the welding status of the welding machine from time to time. It is effective to confirm.

1 is an external view of a welding machine control device according to the present invention,

2 is a schematic block diagram of a welding machine control device according to the present invention;

3 is a front view of an operation unit of the welding machine control apparatus according to the present invention,

4 is an operation flowchart of the welding machine control apparatus according to the present invention.

※ Brief description of symbols for the main parts of the drawings

10: control unit body 20: operation unit

21: welding condition number display part 22: welding voltage display part

23: pressurization time display section 24: welding time display section

25: welding condition setting unit 26: charging completion display unit

27: charge and discharge selection operation unit 28: warning display unit

29: output counter operation unit 31: operation operation switch for each condition

32: power supply switch 40: control board

41: central control unit 43: ROM

45: RAM 47: Timer

49: counter 51: error detection unit

53: AD converter 55: charge and discharge control unit

57: welding control unit 59: pressure control unit

Claims (2)

An operation unit 20 for setting welding conditions of the welded object to be welded and displaying the set welding conditions and an operating state of the welder; The ROM 43 is integrally coupled with the operation unit 20 and stores a control program for controlling a welding operation according to a welding condition setting of the operation unit 20, and a control program stored in the ROM 43 is executed. RAM 45, which is a work space to be operated, a central control unit 41 which controls a welding operation by executing a control program stored in the ROM 43 by setting welding conditions of the operation unit 20, and a working time of a welding machine. Timer 47 for measuring the number, counter 49 for measuring the production amount of the welding machine, AD converter 53 for converting the AC power supplied from the external power supply to the DC power required by the control device is provided In the control device comprising a control board 40; to control the condenser type spot / projection welding machine, The control board 40 includes an error detecting unit 51 for detecting an error generated during a welding operation of a condenser type spot / projection welding machine, and the central control unit 41 according to a welding condition set by the operation unit 20. Charge / discharge control unit 55 for sensing or transmitting a capacitor of the welding machine to charge or discharge, the welding control unit 57 for operating or terminating the welding operation of the welding machine in accordance with the operation signal of the central control unit 41, A control device for a condenser type spot / projection welding machine, characterized in that a pressure control unit (59) is provided for controlling the operation of the welding machine pressing unit for pressing the weldment. The method of claim 1, wherein the error detection unit 51 The overvoltage error detection unit 51a for detecting the overvoltage supply to the condenser of the condenser type spot / projection welding machine, the coolant error detection unit 51b for detecting the coolant error of the welding machine, and the welder used to pressurize the object to be welded. Control device for a condenser spot / projection welding machine comprising an air error detection unit (51c) for detecting the error of the air pressure to be.