The forming principle of a corrugated sheet forming machine is mainly based on mechanical stamping, hydraulic forming, or hot pressing processes. External force is applied to metal or non-metal sheets using a mold to plastically deform them, forming a specific corrugated structure. Specific principles can be categorized as follows:
Mechanical Stamping Forming: Segmented Pressing: For complex corrugated structures (such as multi-groove waveforms), segmented pressing with combined molds is used to avoid deformation or breakage caused by uneven material flow. For example, multiple independent molds are used to sequentially complete stamping, bending, and shearing processes, ensuring corrugation spacing and edge parallelism.
Servo Press Control: Modern equipment uses a servo press for step-by-step forming. By controlling the stamping speed and pressure, springback is reduced and accuracy is improved. For example, 304L stainless steel corrugated sheets require three forming steps from the center outwards to balance material flow.
Hydraulic Forming: Metal Corrugated Pipe Application: High-pressure liquid is filled into the tube blank to expand the material, and axial pressure is used to form the corrugations. The mold adopts a segmented structure, and a hydraulic press is used to close and lock the mold. After forming, pressure is released to remove the part.
Capsule Hydraulic Technology: This technology uses rubber capsules filled with liquid instead of traditional molds. High-pressure liquid causes the tube wall to expand outwards, creating corrugations. It is suitable for efficient forming of long tubes.
Roll Bending Forming
Curved Corrugated Sheets: Multiple rollers (upper roller, lower roller, guide roller) progressively bend the sheet metal. The curvature is controlled by adjusting the gap between the rollers. This is suitable for processing large-size metal sheets.
Key Process Parameters and Control
Gap and Springback: The mold gap needs to be precisely designed (0.03~0.1mm on one side). Too large a gap will result in excessive springback, while too small a gap can cause the workpiece to become thinner or damage the mold.
