The Application of ES500 Frequency Converter in Flying Saw

详细说明

The overall control system of the flying saw is as shown below 1, Among them, the motion control of the flying saw trolley is often completed by the DC speed regulation system or the servo system. With the continuous improvement of the inverter function, some flying saw trolleys have been running at present. Speed tracking and sizing are controlled by advanced foreign inverters. To complete, ES500 series closed-loop vector inverter has reached a very good technical level in terms of dynamic response speed, positioning accuracy, and closed-loop control.

The operation of the flying saw trolley mainly includes, standing still and waiting for the steel pipe to move; the steel pipe moving trolley starts ; Steel pipe moving trolley tracking; speed synchronization clamping drop saw; drop saw continue to synchronize in place; lifting saw and loosening clamp continue tracking; steel pipe moving trolley returns; steel pipe moving trolley returns to the origin to wait for the next cycle.

Features of flying saw equipment

Ø  The sawing trolley and the fixed-size trolley should be connected and stable, and generally made of steel pipes.

Ø  When sawing small-sized steel pipes, the rigidity of the steel pipes is poor and it is easy to bend, which affects the accuracy of the fixed-length, and it is necessary to increase the anti-bending pressure roller.

Ø  The air pressure source should be as stable and reliable as possible to accurately coordinate and complete the various movements of the flying saw machine to ensure the accuracy of fixed-length accuracy and continuous production.

Ø  In the process of clamping, sawing and loosening, the traveling speed of the flying saw trolley should be basically synchronized with the rolling speed of the welded pipe.

Ø  Sawing accuracy should meet the standard requirements of welded pipe products.

Ø  Because the flying saw is an important part of the production line, the equipment is required to operate reliably, otherwise, the entire line will be shut down once a failure occurs.

Ø  The key problem of the control system is how to make the distance between the saw blade and the pipe end exactly the set length of the fixed-size steel pipe at the moment when the speed of the trolley and the pipe is synchronized.

Control Requirements

The specific control requirements are as follows:

One 15kW inverter controls one 11kW Asynchronous motor. The requirements for inverter and control mainly include:

a)      span>The output voltage is stable and the startup current is small.

b)      span>Fast acceleration and deceleration time, good dynamic response characteristics.

c)      span>The braking effect is good, and it can quickly stop in disguise during reciprocating motion to improve efficiency.