Four-Roller Plate Rolling Machine use method

Four-roller plate rolling machine is suitable for metal plate bending and molding work, can roll round, arc and a certain range of conical workpiece, and plate end pre-bending function, the remaining straight edge is small, high efficiency. Four-roller plate rolling machine consists of four rollers, the upper roller is the main drive and the position of the upper roller is fixed, the lower roller is driven by hydraulic cylinders at both ends to lift. The lower roller can be raised to clamp the head of the plate with the upper roller, and the distance between the side roller and the upper roller can be changed to bend the head of both ends of the plate as needed. Then the lower roller down, the two side rollers rise, sheet bending into cylindrical. Any machine must be operated correctly according to the process requirements. Here we will talk about the use of four-roller plate rolling machine in detail.

1. Machine working principle 

four-roller plate rolling machine and three-roller plate rolling machine rollers in different forms of movement, but the same working principle, is also the use of the principle of three-point fixed circle for different radii of the roll. The position of the upper roller is fixed, and the lower roller moves upward in a straight line to clamp the plate. The two side rollers straight line or arc up the rollers close to the movement to adjust the roll radius.

2.Operation process

(1) Preparation: Before starting the machine, first check whether all parts of the equipment are intact and undamaged, especially the rollers, transmission system, hydraulic system and other key components, if any abnormality is found, repair or adjust immediately. And make sure that there is no debris in the working area so as not to affect the operation.

(2) Material preparation: Prepare the metal sheet to be processed and place it flat on the working table of the machine. The operator adjusts the positioning of the sheet reasonably according to the size, thickness and bending radius of the sheet to ensure that it is parallel to the roll axis.

(3) Adjust the roller spacing: according to the thickness and bending radius of the plate, adjust the spacing between the upper and lower rollers of the plate rolling machine. Generally speaking, the greater the thickness of the plate, the smaller the bending radius, the smaller the roller spacing should be. When adjusting the roller spacing, the locking device should be loosened first, and then the roller position should be adjusted by manual or electric means. After adjustment, the locking device should be firm and reliable.

(4) pre-bending: for thicker plates or plates that require a larger bending radius, pre-bending operations should be carried out. Pre-bending can use molds or other auxiliary tools to bend one end of the plate into the desired shape. When pre-bending, care should be taken to control the bending angle and strength to avoid cracks or excessive deformation of the plate.

(5) Start rolling: Start the plate rolling machine so that the rollers rotate slowly. Feed one end of the plate between the upper and lower rollers, and gradually bend the plate through the extrusion and friction of the rollers. In the process of rolling, the bending of the plate should be observed, and the roller spacing and pressure should be adjusted in time to ensure that the bending radius and shape of the plate meet the requirements. When one end of the plate is rolled to a certain extent, the other end of the plate can be fed into the plate rolling machine to continue the plate rolling operation. During the rolling process, care should be taken to keep the two ends of the sheet aligned to avoid distortion or misalignment.

(6) Finish rolling: when the plate rolling is finished, stop the operation of the plate rolling machine. Use suitable lifting equipment to unload the rolled sheet from the coiler and place it in the designated location. In the process of unloading, attention should be paid to safety to avoid collision between the plate and the operator or other equipment.

As an efficient metal plate processing equipment, four-roller plate rolling machine plays a vital role in industrial production. Mastering the correct operation method can not only improve the processing efficiency, but also ensure the processing quality and extend the service life of the equipment.

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