A rolling machine is a kind of general equipment that can roll and bend metal sheets into a cylinder, arc, or another shape workpiece. According to the principle of three-point rounding, the continuous plastic deformation of sheet metal is produced by using the relative position change and rotation movement of the workpiece to obtain the workpiece with a predetermined shape.
The products are widely used in boiler, shipbuilding, petroleum, woodworking, metal structure, and other machinery manufacturing industries. As a special machine, plate bending machine plays an important role in basic industrial processing.
All steel forming for cylindrical, almost all with the rolling machine roll. It has applications in the automobile, the military industry, and so on.
According to different requirements, it can roll out steel columns that meet the requirements, which is a very practical instrument.
In foreign countries, it is generally divided by the configuration of the work roll. In China, the number and adjustment form of work rolls are generally taken as the standard to implement mixed classification, which is generally divided into
It has been several decades since the mechanical transmission was used in plate rolling machine. Because of its simple structure, reliable performance and low cost, it is still widely used in medium and small plate rolling machines. In the rolling machine with low speed and high torque, because of the large volume of the transmission system, the large power of the motor and the large fluctuation of the power grid when starting, the more and more hydraulic transmission is used. In recent years, there is hydraulic motor as the source to control the movement of work roll, but the main drive is still mechanical transmission of mechanical and hydraulic mixed transmission of plate bending machine, there are also hydraulic motor as the work roll rotation power source of all hydraulic plate bending machine.
The working capacity of the plate rolling machine (bend metal sheets) refers to the capacity of the minimum drum diameter when the maximum plate thickness and width are rolled according to the specified yield limit under the cold state. Cold coiling is widely used at home and abroad. The cold coil has high precision, simple operation process and low cost, but it requires high quality of plate (such as no notch, crack and other defects) and good consistency of metallographic structure. When the thickness of the rolled plate is larger or the bending radius is smaller and exceeds the working capacity of the equipment, the hot rolling method can be used on the premise of the equipment. Some do not allow cold coil plate, hot coil rigidity is too poor, then use warm coil method.
Unveiling the Working Principle of Plate Rolling Machines
Introduction
Plate rolling machines are vital tools in the metalworking industry, designed to bend and shape metal plates with precision and efficiency. Understanding the working principle behind these machines is crucial for operators and manufacturers alike. In this article, we will delve into the working principle of plate rolling machines, shedding light on the key components, mechanisms, and processes involved. By gaining insight into this fundamental principle, you will be equipped with the knowledge to effectively operate plate rolling machines and achieve accurate and high-quality results in metal plate bending.
a. Frame: The frame provides the structural support for the machine, ensuring stability and rigidity during the bending process.
b. Rolls: Plate rolling machines typically feature three rolls, including a top roll, a bottom roll, and two side rolls. These rolls are responsible for gripping, feeding, and bending the metal plate.
c. Drive System: The drive system powers the rolls and enables their rotation, either through hydraulic, mechanical, or electrical mechanisms.
d. Hydraulic System: Plate rolling machines often employ hydraulic systems to control the movement and pressure applied to the rolls, ensuring precise and consistent bending.
a. Preparing the Plate: The metal plate to be bent is prepared by cleaning it from dirt, oil, and other contaminants. Its dimensions and alignment are checked to ensure accurate bending.
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b. Adjusting Roll Positions: The rolls of the plate rolling machine are adjusted according to the required plate thickness, taking into consideration the desired bend radius and curvature. The top roll and side rolls are typically adjustable, while the bottom roll remains fixed.
c. Plate Feeding: The metal plate is fed into the plate rolling machine, typically from the side or front. The plate is positioned between the rolls, ensuring proper alignment.
d. Initial Rolling Pass: The rolling process begins with the initial rolling pass. The top roll and side rolls apply pressure to the plate, gripping it between them. The rolls rotate, pulling the plate through the machine. As the plate moves forward, it undergoes plastic deformation, gradually bending to the desired curvature.
e. Multi-Pass Rolling: For thicker plates or tighter bends, multiple rolling passes may be necessary. After each pass, the rolls are adjusted to apply increased pressure and reduce the roll gap, enabling further bending in subsequent passes. The plate is fed through the machine again, repeating the rolling process until the desired shape is achieved.
f. Rolling Direction: The direction of plate rolling can be either forward or reverse, depending on the desired bend and the specific requirements of the application. The rolling direction is controlled by the operator, and it determines the curvature and orientation of the bent plate.
g. Roll Adjustments: Throughout the rolling process, the rolls may require occasional adjustments to maintain alignment, pressure, and proper grip on the plate. These adjustments ensure consistent bending and prevent slippage or deformation issues.
h. Final Rolling Pass: Once the desired curvature and shape are achieved, a final rolling pass is performed to ensure uniformity and smoothness of the bent plate.
a. Operator Training: Ensure that operators receive proper training on the safe operation of plate rolling machines, including knowledge of the machine&#;s controls, emergency stop features,
and safety protocols.
b. Personal Protective Equipment (PPE): Operators must wear appropriate PPE, including safety glasses, gloves, and steel-toed shoes, to protect against potential hazards during the bending process.
c. Machine Inspection: Regularly inspect the plate rolling machine for any signs of damage or wear. Lubricate the moving parts as per the manufacturer&#;s recommendations to maintain optimal performance.
d. Secure Plate Placement: Properly secure the plate in position before initiating the rolling process to prevent movement or slippage.
e. Material Handling: Use appropriate lifting equipment or techniques when loading and unloading metal plates to prevent injuries and accidents.
f. Avoid Overloading: Do not exceed the maximum capacity or thickness limits specified by the manufacturer. Overloading the machine can lead to equipment failure and compromise safety.
Conclusion
Understanding the working principle of plate rolling machines is essential for anyone involved in metal plate bending. By comprehending the fundamental components, coordinated movements, and forces at play, operators can effectively utilize these machines to achieve accurate and high-quality results. Additionally, adherence to safety considerations and best practices ensures the well-being of operators and the longevity of the equipment. With a solid grasp of the working principle and a commitment to safety, operators can harness the full potential of plate rolling machines in various metalworking applications.
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