The three-roller plate rolling machine is a general-purpose equipment for bending metal sheets into cylindrical, arc-shaped or other workpieces. Its working principle is based on the principle of three points forming a circle. Through the change of the relative position of the workpiece and the rotational movement, the plate produces continuous plastic deformation, thereby obtaining a workpiece of a predetermined shape.
The three-roller plate rolling machine is an important processing equipment, which is mainly composed of three rollers, divided into upper roller, lower roller and side roller. The upper roller and the lower roller are responsible for rotating and bending the processed plate to complete the plate rolling task, while the side roller is used to clamp the plate and assist in the pre-bending and rolling process.
The three-roller plate rolling machine can roll metal sheets into round, arc-shaped and conical workpieces within a certain range through the interaction of its three working rollers (two lower rollers and one upper roller).
Steps For Rolling Workpieces With A Three-Roller Plate Rolling Machine
Preparation stage:
- Ensure that all parts and rollers of the plate rolling machine are in good working condition and are not damaged or loose.
- Select appropriate rollers and adjust the position of the rollers as needed to ensure uniform contact between the rollers and the metal sheet and avoid excessive or insufficient pressure.
Pre-bending stage:
- Place the metal sheet on the bending die, press down the upper roller and roll the bending die back and forth so that the edge of the sheet reaches the required bending radius.
- Pre-bending must be done in sections, pre-bending both ends. Perform two pre-bendings to ensure that the edge of the sheet reaches the required bending radius.
Rolling stage:
- Roll the sheet that has been pre-bent twice so that the longitudinal center line of the sheet is parallel to the axis of the roller.
- During the rolling process, the rolling effect can be controlled by adjusting parameters such as the distance between the three rollers, pressure, and speed.
Rounding stage:
Roll the sheet back and forth 1-2 times under the corrected curvature of the plate rolling machine roller to eliminate the uneven curvature during the rolling process and ensure that the curvature of the cylinder or arc is uniform.
Completion stage:
- After the rolling is completed, check the quality and shape of the curling to ensure that it meets the requirements.
- If problems are found, fine-tuning and adjustments can be made as needed, such as adjusting the position of the roller, increasing or decreasing the pressure, etc.
Precautions
- During the rolling process, pay special attention to the integrity of the safety device to ensure the safety of the operator.
- According to the properties and requirements of the rolled material, select appropriate rolling parameters such as pressure, speed, roller distance, etc. to achieve the best rolling effect.
- Before rolling, the sheet should be fully inspected to ensure that its flatness and quality meet the rolling requirements.
Conclusion
The three-roller plate rolling machine is suitable for the bending and deformation of metal sheets, and can roll various types of workpieces. It is widely used in shipbuilding, boilers, aviation, hydropower, chemical industry, metal structure and machinery manufacturing industries.