1.What are the principles and customization points of longitudinal shearing and slitting?
Principle: A slitting machine (with multiple sets of circular blades) slits wide hot-dip galvanized coils lengthwise into multiple narrow strips (customizable widths, such as 100mm, 200mm, and 300mm). The strips are smooth, burr-free, and exhibit no plating peeling.
Customization Key: The strip width (accuracy: ±0.1mm) and roll diameter can be adjusted to meet the unwinding requirements of downstream processing equipment. Multiple strips can be split from a single roll (e.g., a 1250mm wide roll can be slit into five 250mm wide strips).
Applications: Used in the production of products requiring narrow strips, such as guardrail posts, electrical wiring terminals, photovoltaic mounting accessories, and roller shutter rails.
2.What are the principles and customization points of cross-cutting technology?
Principle: A transverse shear (with reciprocating or rotary blades) cuts hot-dip galvanized coils widthwise into fixed-length flat sheets (customizable lengths, such as 2000mm, 3000mm, and 6000mm). The cut sheets exhibit high flatness (deflection ≤ 3mm/m) and are free of warp.
Customization Key Features: The cutting length (accuracy ±0.5mm) and sheet quantity (a single roll is cut into a fixed number of flat sheets) can be customized. Dual customization options are available, including "fixed length + fixed sheet" (e.g., each sheet is 2440mm x 1220mm, suitable for architectural decorative panels).
Applications: Suitable for applications requiring fixed-size flat sheets, such as building exterior cladding, equipment housing covers, appliance back panels, and container side panels.
3.What are the principles and customization points of high-precision Kaiping technology?
Principle: For thick-gauge hot-dip galvanized coils (thickness > 2.0mm) or high-strength hot-dip galvanized coils (such as HC420LA and HC500LA), a combined "unwinding machine + straightening machine" process first unwinds the coils, then straightens them through multiple rollers to eliminate internal stresses. Finally, the coils are cut to length, ensuring they are stress-free and meet flatness standards.
Customization Key Points: Straightening accuracy (flatness ≤ 1mm/m) and cutting dimensions (supporting extra-wide/extra-long dimensions, such as 1800mm wide and 12000mm long) can be customized to meet the needs of thick-walled structural parts.
Application Scenarios: Used in steel structure support components, base plates for large equipment, container floors, and other thick-walled products with strict requirements for flatness and internal stress reduction.
4.What are the principles and customization points of the roll forming process?
Principle: Hot-dip galvanized coils (or strips) are continuously rolled into profiles of specific cross-sections (such as C-sections, Z-sections, U-sections, photovoltaic rack rails, and automotive door frame reinforcements) using multiple sets of consecutively arranged forming rollers (each set of rollers corresponds to a forming step). The forming process is continuous and efficient, with high cross-sectional accuracy (±0.2mm).
Customization Key Features: Profile dimensions (e.g., C-section height 100-300mm, flange width 50-150mm), wall thickness (consistent with the base material thickness, 0.8-4.0mm), and length (supporting cut-to-length lengths such as 6m, 9m, and 12m) can be customized. Even special cross-sections (such as composite sections with holes or grooves) can be customized.
Applications: Building steel structures (C/Z-section steel purlins), photovoltaic racks, automotive body components, and door and window frames.
5.What are the principles and customization points of stamping process?
Principle: A stamping die (punch + die) applies pressure to a hot-dip galvanized flat sheet, causing it to plastically deform. This process creates complex parts with recesses, holes, and curved surfaces (such as button holes in home appliance panels, brackets in automotive chassis, and curved structures in radiator linings). Both shallow and medium-deep drawing are supported (adjusted to the substrate strength; ordinary low-carbon galvanized coil is suitable for shallow drawing, while high-strength galvanized coil is suitable for medium-deep drawing).
Customization Key Points: Customizable stamping patterns (such as round holes, square holes, and patterns), surface curvature (such as R5-R50mm fillets), and hole position accuracy (±0.1mm) are available. This requires matching the die design (downstream suppliers can provide drawings and the die will be customized).
Applications: Home appliance housings (refrigerator side panels, washing machine back panels), automotive parts (door inner panels, chassis brackets), and hardware accessories (distribution box housings, switch cabinet partitions).