Q:How to choose the raw materials for galvanized corrugated sheet?
A:Substrate selection: Cold-rolled steel or hot-rolled steel is usually used to ensure that the surface of the substrate is flat and free of defects.
Surface pretreatment: Remove oil, rust and oxide layer through cleaning and pickling to provide a clean surface for galvanizing.
Q:What fields are galvanized corrugated sheets commonly used in?
A:Construction industry: roofs, walls, enclosures (lightweight and wind-resistant).
Agriculture/industry: granary roofs, workshop partitions, equipment protection covers.
Temporary facilities: construction site sheds, exhibition booths.
Q:What is the core technology of galvanized corrugated sheet?
A:Roll forming is the core process, the steps are as follows：
1. Uncoiling: Install the galvanized steel coil on the uncoiling machine and unfold it into a flat plate.
2. Guiding and leveling: The flatness of the steel plate is adjusted by the guide roller and the leveling machine to avoid wrinkles during processing.
3. Roller forming: The steel plate is gradually pressed into a predetermined wave shape (corrugated shape) through multiple sets of rollers with gradually changing shapes.
4. Shaping and straightening: The last set of rollers shapes and straightens the corrugated plate to ensure uniform waveform.
Q:What are the common corrugated shapes?
A:Trapezoidal wave, sine wave, V-shaped wave, etc. Different waveforms correspond to different wave heights (such as 30-100mm) and wave distances (such as 100-300mm), which affect the strength and drainage performance of the board.
Q:How to detect the appearance of corrugated board?
A:1. Appearance inspection: no cracks, coating shedding, obvious scratches on the surface, uniform waveform, no burrs on the edge.
2. Galvanized layer inspection: Use a magnetic thickness gauge to measure the thickness of the galvanized layer, which meets the requirements of national standards such as GB/T 2518.
3. Mechanical properties test:
Compressive strength: Test the deformation resistance of corrugated board through static load test.
Wind resistance: Test the stability of the board after fixing in a simulated wind pressure environment (applicable to roofing projects).
4. Dimensional accuracy measurement: Check whether the wave height, wave distance, length and width meet the design requirements.
