1.Industry overview

The plate rolling machine is a kind of equipment that uses the work roller to bend and form the plate. It can form parts of different shapes such as cylindrical parts and conical parts. It is a very important processing equipment. The working principle of the plate rolling machine is through the action of external forces such as liquid pressure and mechanical force, so that the work roller movement, so that the plate bending or rolling forming. According to the rotating movement and position change of the work roller of different shapes, the parts such as oval parts, curved parts and barrel parts can be processed. Plate rolling machine due to the use of different fields, the type is also different. According to the number of rolls, it is divided into three rolls and four rolls. Three rollers are divided into symmetrical three-roll coiling machine, horizontal down-adjusting three-stick coiling machine, arc down-adjusting coiling machine, upper roller universal three-roll coiling machine, hydraulic numerical control coiling machine, etc. FGI inverter has a mature application in the plate rolling machine industry, of which the three-roll plate rolling machine is the most widely used.

Next, we introduce the application of FGI FD300 series frequency converter in three-roll plate winding machine.

2.equipment introduction

Three-roll plate rolling machine is mainly composed of 1 upper roller and 2 lower rollers, the upper roller is located in the central symmetric position of the 2 lower rollers, and the hydraulic oil in the hydraulic cylinder acts on the piston for vertical lifting movement, the 2 lower rollers are driven by the main motor, and the final gear of the reducer controls the rotation of the two lower rollers to provide torque for the coil sheet.

The flat metal plate is transported by the feeder to the side of the three working rollers of the plate rolling machine, with the help of the downward pressure of the upper roller and the rotating movement of the lower roller, the metal plate is continuously bent through multiple passes (the inner layer compression deformation, the middle layer is unchanged, the outer layer tensile deformation), resulting in permanent plastic deformation, and the required cylinder, cone or part of them are rolled.

A row of fixed rollers is added to the lower part of the lower roller, which shortens the span of the two lower rollers, thereby improving the precision of the winding workpiece and the overall performance of the machine.

3.system configuration

The control system of the plate rolling machine is composed of man-machine interface +PLC+FD300 frequency converter. The lower roll, lower roll translation and hydraulic oil pump in the transmission part are vector controlled by one FD300 frequency converter (equipped with brake unit and brake resistance), and the roller station is matched with the external mechanical brake to realize fast and accurate start and stop. The user can set the product parameters on the touch screen according to the process requirements, and control the production of the equipment with the operating station or wireless remote controller.

4. Application advantages

The transmission part of the equipment is controlled by FGI FD300 high-performance inverter, which ensures the synchronous and stable operation of the system, makes the system easy to operate, reduces the maintenance cost and prolongs the service life of the machine.

FD300 series inverter has advanced vector control algorithm, drive motor low speed and high torque output, make the whole system start and stop process smooth and accurate, achieve rapid system response, improve the efficiency of equipment.

FD300 inverter can provide complete overcurrent, overvoltage, undervoltage, overload and other protection functions, to achieve all-round protection of the motor, so that the system runs stably and reliably.