1) Hand arc welding (STICK)
Shielded Arc Welding (abbreviated SMAW) in English,
The principle is: the welding method of generating an electric arc between the coating electrode and the base metal, and using the arc heat to melt the electrode and the base metal. The outer layer of the electrode is covered with flux, which melts when heated, and has the functions of stabilizing the arc, forming slag, deoxidation, and refining.
The welding power source uses an alternating current welding machine or a direct current arc welding machine with descending characteristics. Generally, an alternating current arc welding machine is used, and a direct current arc welding machine is used when arc stability is particularly required.
Key features:
1: The welding operation is simple
2: The welding tong is light and easy to move,
3: Wide range of applications
2) Melting Extreme Gas Shielded Welding (CO2/MAG/MIG)
Gas metal arc welding (abbreviated GMAW)
MAG Welding: metal Active Gas Welding
MIG Welding: metal Inert Gas Welding, (Inert Gas: Inert Gas)
According to the type of shielding gas, it is roughly divided into MAG welding and MIG welding. MAG welding uses CO2, or mixture of C02 or oxygen (these are called reactive gases) in argon. The welding habit that only uses CO2 gas is called CO2 arc welding, which is different from MAG welding. MIG welding uses inert gases such as argon and helium.
The principle is a welding method in which an arc is generated between the thin diameter consuming electrode (welding wire) and the base metal, and the surrounding area is sealed with shielding gas, and the base metal and the wire are melted. It is widely used in semi-automatic welding with hand-held welding torches by operators, as well as in the fields of robot welding and automatic welding.
Features of CO2 welding:
1: The welding speed is fast
2: High arc striking efficiency
3: The melt pool is deep
4: High deposition efficiency
5: One welding wire can be applied to a variety of plate thicknesses
6: Good welding quality
7: Small deformation after welding
8: One welding wire can be applied to a variety of base metals
Features of MAG welding:
1: In addition to the advantages of CO2 welding
2: The appearance of the weld is beautiful
3: Less splashing
4: Double-sided forming welding and all-round welding are easy
5: Suitable for high-speed welding
Features of Pulse MIG (GMAW) Welding:
The MIG method is mostly used for aluminum welding, and generally adopts pulse control.
Pulsed MIG welding allows for minimal spatter with jet transitions. The appearance of the weld is beautiful, and a flat weld stack shape can be obtained. Compared to pulse-free MAG/MIG welding, the coarser wire can also be used for jet transition, resulting in improved wire feeding performance and reduced wire cost in thin plate welding. In particular, aluminum and alloy welding play an advantage in automation and robotization.
The principle of pulsed MIG (GMAW) welding: The welding current is periodically repeated in the form of pulse current Ip and base current Ib, and the droplet transition can be achieved in a wide range of welding current fields.
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Common faults and solutions of Megmeet inverter
Fault one
Fault phenomenon: the leakage protection switch trips, the inverter is energized or the equipment leakage protection switch is operated during operation
Solution: 1. When the inverter drives the motor, the leakage value is larger than that of the non-inverter system, and the leakage protection value of the leakage protection switch is required to be more than 150mA, ...
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Megmeet drives – how should high-voltage drives be maintained after they are shut down?
1. Check the surrounding situation - carefully check the ventilation and lighting of the inverter and the surrounding environment. It is necessary to ensure that the ventilation equipment is functioning properly and that the lighting equipment is in working order.
2. Check the internal cable - open the inverter cabinet door and check whether the internal cable is damaged, the cable ...
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Megmeet PLC - What are the features of the PLC program?
1. Correctness (low debugging cost)
First of all, the PLC program must be able to work correctly to meet the requirements of the actual control process. This is the essence of the PLC program, and if you don't do that, nothing else makes sense.
2. Reliability (low maintenance cost)
Not only to ...
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Megmeet drive common fault repair methods
When the oscilloscope looks at the current monitoring output of the driver, it is all noisy and cannot be read
Cause: The current monitoring output is not blocked from the AC power supply (transformer).
Solution: You can use a DC voltmeter to detect and investigate.
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Megmeet Inverter - Precautions for the Use of Inverter (11-21)
11. For the occasion when the inverter drives the ordinary motor for constant torque operation, long-term low-speed operation should be avoided as much as possible, otherwise the heat dissipation effect of the motor will become worse and the heating will be serious. If long-term operation at low speed constant torque is required, a variable frequency motor must be selected.
12. For the promotion of negative ...
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Megmeet drives – what are the benefits of using drives?
1. Energy saving of frequency conversion speed regulation
1) Due to the use of frequency conversion speed regulation, the energy-saving effect of fans and pump loads is the most obvious, and the power-saving rate can reach 20%-60%, this is because the power consumption of the fan pump is proportional to the cubic of the speed.
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The unified setting of the Megmeet welding machine and the parameter setting of the system
1. Unified setting of Megmeet welding machine
The so-called unification of welding means that the welding machine automatically matches the welding voltage according to the currently set welding current and the unification voltage correction value.
The unification setting of Megmeet welder should first turn on the function on the welder side, ...
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Megmeet Inverter - Precautions for the Use of Inverter (1-10)
1. The inverter must be selected correctly.
2. Read the product manual carefully, and wiring, installation and use in accordance with the requirements of the manual.
3. The inverter device should be reliably grounded, and the radio frequency interference should be suppressed to prevent the inverter from causing electric shock due to leakage.
4、 ...
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Megmeet PLC - What places should be avoided when installing PLC control?
(1) The ambient temperature exceeds the range of 0-50 °C;
(2) The relative humidity exceeds 85% or there is dew condensation (caused by sudden temperature changes or other factors);
(3) direct sunlight;
(4) There are corrosive and flammable gases, such as hydrogen chloride, ...
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Common faults and solutions of Megmeet inverter
Fault one
Fault phenomenon: the leakage protection switch trips, the inverter is energized or the equipment leakage protection switch is operated during operation
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Megmeet inverter - a common measure for anti-interference of high-voltage inverters
(1) The E end of the high-voltage inverter should be connected to the shell of the control cabinet and the motor, and should be connected to the ground, and the grounding resistance should be less than 100Ω, which can absorb surge interference.
(2) The input or output of the high-voltage inverter is equipped with an inductive magnetic ring filter. Flat and 3-4 turns, helps to inhibit ...
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Megmeet inverters – what are the development directions of inverter-related technologies?
1. Intelligent network
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Introduction to Megmeet welding machine
The EhaveCM350AR is a fully digital inverter melting multi-functional industrial heavy-duty Megmeet welding machine launched by Megmeet for global metalworking manufacturing. It brings customers higher quality and higher efficiency welding experience and value with excellent arc characteristics, reliability and high efficiency, and helps customers ...
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Megmeet welding machine - the application and protection of AC arc welding machine should pay attention to
What aspects should be paid attention to in the application and protection of AC arc welding machine:
(1) It should be used according to the additional welding current and load continuation rate of the welding machine, and should not be overloaded.
(2) The welding machine is not allowed to be short-circuited for a long time.
(3) The regulating current should be operated at no load.
（4） ...
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Megmeet inverter - the fault handling method of low-voltage inverter
Before using the inverter, the inverter parameters should be carried out from the following aspects:
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Clause...
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Megmeet inverter - the speed regulation method of high-voltage inverter
1. Hydraulic coupling method. That is, a hydraulic coupling device is inserted between the motor and the load in series, and the size of the coupling force between the motor and the load is adjusted by the height of the liquid level, so as to realize the speed adjustment of the load;
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The causes of the failure of the Megmeet welding machine and how to deal with it
1. The welding machine has no welding current output
1. Cause of failure: the internal wiring of the non-voltage input at the input end of the welding machine falls off or the internal coil of the broken circuit is burned out.
2. Treatment method: check whether the switch, wire, fuse and connection parts from the distribution box to the input end of the welding machine are in good condition.
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Megmeet PLC - What are the five stages of the PLC work process?
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2. Program execution: The CPU interprets and executes each instruction in the order of first left and then right, first up and then down, and reads out each relay according to the input image register and the component image register.
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Megmeet PLC – 10 PLCs integrated failure analysis
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Megmeet drives – the design essentials of the drive control cabinet
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1. Wiring specification of inverter
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