Failure and maintenance of welding machines

On September 24, the 2021 Zhongguancun Forum, co-sponsored by the Ministry of Science and Technology of China, the Chinese Academy of Sciences, the China Association for Science and Technology, and the Beijing Municipal People's Government, officially opened in Beijing. As one of the main agendas of the forum, the Zhongguancun International Technology Exchange Conference closely follows the "smart· healthy· carbon neutrality...

There are many types of PLC products, and their specifications and performance also vary. PLCs are usually classified according to their different structural forms, differences in functions, and the number of I/O points. 2.1 Classification by structural form According to the structural form of PLC, PLC can be divided into whole ...

1. It is necessary to figure out the basic parameters and shape of the device that needs to be replaced. The basic parameters include the rated operating current, the capacitance of the capacitor, the resistance value of the resistor, the value of the GTR Darlington device (current amplification factor), the switching characteristics of the IGBT (including IPM) device, and the saturation voltage ...

The first is relay output, the relay output response speed is slow, the output current is large, generally can reach 2A, but the electric shock life is short, the output frequency is low, the maximum is 1HZ; The second is transistor output, the transistor output response speed is fast, the output current is small, and the contact life is relatively small.

1. The arc is stable in the field of full current, the spatter is small, and the same welding machine is not only suitable for small current base welding, but also suitable for high current and high deposition rate work 2. Arc concentration and strong penetration. With the same penetration depth, the heat input is reduced by more than 20% compared with other gas shielded welding machines, and the thermal deformation ...

a. Power supply The power supply of the PLC plays a very important role in the whole system. It can't work properly without a good and reliable power supply system, so PLC manufacturers also attach great importance to the design and manufacture of power supplies. General AC voltage fluctuations are +10% (+15%) ...

1. Realize remote control of industrial field equipment; 2. The PLC industrial gateway realizes remote upgrade of equipment firmware, downloads the program, and can flexibly access various equipment management platforms; 3. Realize remote control of industrial site touch screen and remote mapping of configuration screens; 4. PLC industry ...

1. Control through this abnormal failure The abnormal fault of the control channel is usually caused by the optical fiber communication between the sub-PWM board and the power unit board, which is generally caused by the following situations: 1. Poor contact of the optical fiber connection part or falling off of the optical fiber head; 2. Optical fiber signal transmitter/receiver ...

1. The inverter protects itself Instantaneous overcurrent, overvoltage, undervoltage, overload, short circuit to ground, abnormal control circuit, then for the protection of the inverter itself, the limit value of overcurrent, overvoltage, undervoltage, etc., when the inverter is running, if it exceeds ...

1. The circuit board inside the inverter belongs to precision electronic components, which needs to be moisture-proof and dust-proof, and the temperature and humidity are not too high, and cannot be installed on the bare wall, so the inverter should be installed in the middle of the control cabinet; The inverter should be installed vertically, and the installation should be avoided directly above and below ...

1. Understand the type of variable frequency load The correct selection of the frequency converter is very critical for the proper operation of the control system. When selecting a frequency converter, it is important to fully understand the load characteristics driven by the frequency converter. In practice, production machinery is often divided into three types: constant torque load, constant ...

(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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Advantages of resistance welding: 1。 When a nugget is formed, it is always surrounded by a ring of plastic, the molten metal is isolated from the air, and the metallurgical process is simple 2。 The heating time is short, the heat is concentrated, the heat affected zone is small, and the deformation and stress are small. In general, there is no need to arrange calibration and heat after welding.

1. Common processing: reset the monitoring timer, perform hardware checks, user memory checks, etc. 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.

With the rapid development of the machinery manufacturing industry, the traditional general machine tool can no longer meet the changing parts processing needs of the shopping mall. CNC machine tools have undeniably become the mainstream processing equipment of today's machinery manufacturing. In response to the special application needs of the machine tool industry, Megmeet has launched the MV series of high-function ...

1. PLC industrial gateway has rich interfaces and is easy to deploy It supports 4G, 3G, PPPOE, Wi-Fi network, digital IO input and output, and serial terminal communication, providing different access solutions for different applications. 2. Intelligent analysis and efficient access Inline protocol analysis ...

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, ...

1. The meaning of the representation is different: PLC is the abbreviation of planar optical waveguide (technology), the so-called planar optical waveguide, means that the optical waveguide is located in a plane. A servo control system is a feedback control system used to accurately follow or reproduce a certain process.

1. E1: indicates sensor failure. In this case, it is necessary to check whether the sensors of Megmeet are damaged or whether the wiring is loose. 2. E2: Indicates overweight load. At this point, it is necessary to check whether the load of Megmeet exceeds the set maximum load. 3. E3: Indicates battery ...