KR20040107556A - A Power Consumption Spot Welding Machines of 4 Head Condenser Type - Google Patents

Abstract

PURPOSE: A four-head power-saving condenser resistance welding machine is provided to improve working efficiency by welding four sides quickly with a digital controller, and to maintain and control plural welding machines by the single centralized control system. CONSTITUTION: A four-head power-saving condenser resistance welding machine is composed of four-head welding parts, a power supply unit operating the four-head welding machine, an operating unit setting welding condition and displaying the operation of the welding machine with operating switches and plural lamps, a digital controller composed of a microprocessor controlling welding condition, and a centralized control system controlling plural welding machines. The welding condition is predetermined according to the kind, the thickness of the work piece to be welded and welding strength, and the welding state of the welding machine is checked.

Description

{A Power Consumption Spot Welding Machines of 4 Head Condenser Type}

Conventional condenser resistance welding machine in the technical field of the present invention is commercialized only for one or two-side welding, and the controller is only analog control method is difficult to expect a variety of functions and high quality products. Even in foreign countries, condenser resistance welding machines are commercialized only for one- or two-side welding, and controllers are mainly produced with analogue control methods, and some manufacturers are developing small (less than 1 kVA) and large capacitor resistance welding machines are still available. Microprocessor is not applicable. In addition, since each welding machine inputs various welding parameters, a centralized welding machine configuration is urgently needed.

The present invention has been made to improve the problems of the conventional condenser resistance welding machine described above, the present invention is to enable the use and control of a variety of welding conditions, that is, various types of welded objects and welding time and charging voltage The purpose is to increase the convenience and efficiency of the welding process by using a method of controlling each welding machine from a single central controller.

1 is an external view of a four-head welder according to the present invention;

2 is a power supply of the welding machine according to the present invention

In order to achieve the above object, the four-head power saving type condenser resistance welding machine according to the present invention includes a four-head welding part, a power supply for the normal operation of the four-head welding machine, a digital controller consisting of a microprocessor controlling welding conditions, and It consists of a centralized control system that can centrally control the welding machines.

1 is an external view of a four-head welder according to the present invention.

2 is a power supply unit of the welding machine according to the present invention.

The power supply unit turns on the primary side SCR to apply voltage to the capacitor, and the charging current of the capacitor is limited through the current limiting resistors R5 and R6, which limit the constant current to charge the capacitor. Turn off the SCR and cut off the voltage to keep the voltage charged to the capacitor constant.If you turn on the secondary SCR to weld using the charged voltage, the current flows through the secondary transformer for a user-defined time. The weldment is welded.

The digital controller, which consists of a microprocessor for controlling welding conditions, includes a user manipulation processing unit, an external interface beam, a power supply unit, a central processing unit, and an amplification operation unit. It consists of a warning lamp control unit and a number display control unit for various alarm display. The external interface is a part where the digital controller, condenser welder and peripherals are connected. It is divided into input and output parts. The input unit has a capacitor charging voltage input, a signal input of a malfunctioning part, and various SCR state inputs. The input terminal is connected to an operation heavy part which constantly reduces the signal strength before the input signal goes to the central processing unit. The output unit sends various signals calculated by the central processing unit to the condenser welding machine and the peripheral device, and is controlled using a relay because the operating voltages are different. The power supply unit uses the same power supply as that of the condenser welder and supplies power to each part through a transformer. The operational amplifier is a part that processes the high charge voltage coming into the digital controller before converting it from analog to digital, and drops the high capacitor charge voltage to match 5V, the operating voltage of the microprocessor.

The centralized control system configuration can be used to control multiple welding machines from one computer or controller, and is always configured to diagnose and check the status of the welding machine, and to diagnose and check the status of the welding machine along with the control through the Internet. do. In addition, this welding machine data can be stored separately for later welding, which is constructed using a technology called LonWorks.

As described above, the present invention enables fast and high quality welding by performing four-side welding, and by using a digital controller, it is possible to set welding conditions according to the type and thickness of various welded objects, welding strength, and the like. The convenience of operation that can be easily operated according to the conditions is improved, and the welding situation of the welding machine can be monitored and confirmed at any time. In addition, by configuring a centralized control system, a large number of controllers in the welding process can be replaced by a single computer or controller, thereby improving work efficiency of the manager.

Claims (1)

A four-head energy-saving condenser type resistance welding machine is provided with a plurality of operation switches and lamps for setting a drawing of a four-head welding part, a welding condition for a power supply part of a four-head welding machine, and a welded object, and displaying the set welding condition and the operating state of the welding machine. A control unit, a central control unit for controlling using a microprocessor, and an operational amplifier unit for amplifying the capacitor charging voltage and supplying a signal to the central control unit. All control methods using LonWorks in centralized control system.