Advantages of PLC controlled cage welding machine

Advantages of PLC controlled cage welding machine
Pile welding machine is a special mechanical equipment in cement products industry. At present, the rolling welding machine used in the production practice in our country is divided into the following two kinds:
First, the single chip microcomputer control, this kind of rolling welding machine can realize automatic production, improve the production efficiency, and can meet the demands of many varieties and multiple specifications of products. However, in ensuring the precision of pitch still rely on manual or mechanical transmission adjustment, the motor uses electromagnetic speed regulation, there is a large pitch error, welding speed and pitch can not be adjusted at will, solder joints can not track and other problems.
The second is the use of PLC and AC motor frequency control technology, the welder can realize automatic processing, further improve the level of automatic control of the welder. The system automatically completes the machining calculation and welding control according to the preset pitch length. The operation of the tray and the trolley is automatically identified and calculated by the PLC control software. When the speed of the material plate changes artificially, the speed of the trolley will follow the change to ensure that the length of the pitch of the processing is unchanged. In order to prevent misoperation, the change of the process parameters is invalid during the operation, and the modification is effective only in the shutdown state.
The cage welding machine using PLC and AC motor frequency conversion speed regulation technology also has the following advantages:
A. High degree of automatic, the electric control part of the hobbing welding machine uses the frequency converter +PLC+ man-machine interface, which reduces the requirements for the proficiency of the operator. Due to the use of PLC, the degree of automation is greatly improved, electrical components are reduced a lot, reduce the failure rate, improve the reliability of equipment operation.
It is mainly reflected in the following aspects: 1. It realizes the degree preset of the skeleton length and size, and can be directly called.
2. When automatic welding, adjust the speed of the main engine, and the pulling speed changes accordingly to ensure the spacing between the ring bars.
3. All the motors are controlled by frequency conversion, and the man-machine interface directly prompts the fault location. There are operation instructions of the equipment in the man-machine interface, making it easier for the operator and maintainer to use and maintain the equipment.
B. the welding speed has been fundamentally improved, due to the use of secondary rectifier as a welding power source, due to the current but zero, secondary no inductive reactance and many other advantages, welding speed and AC power has been significantly improved, at the same time, welding quality has also been significantly improved, the main experience is:
1. When secondary rectifier is used, because it is DC power supply, unlike AC power each cycle wave has to pass through zero, the welding area warms up fast, and avoids the heat loss caused by cooling when the AC current amplitude drops, improves the thermal efficiency, and can reduce the splash caused by too much current when the AC amplitude rises.
2. The DC power supply eliminates the influence of AC current in each cycle through zero. The current density can be greatly improved, which provides a reliable guarantee of energy for improving the welding speed.
3. Dc power makes the capacity of the welding transformer can be greatly reduced, this is because the current and magnetic field no phase difference, no skin effect, the same size of the current, using DC, solder joint current density is high, the current is more concentrated through the welding center, so under the same conditions, the required current is 25 ~ 30% lower than AC power supply, solder joint strength will be higher, More energy saving.