Definition and Core Characteristics of Sheet Metal Panels
Sheet metal panels are functional components formed from metal sheets (typically 0.5-6mm thick) through cold working. They offer advantages such as light weight, high strength, and low cost.
Their core characteristics include:
1. Material Diversity: Commonly used materials include cold-rolled steel (SPCC), stainless steel (SUS304), and aluminum (5052-H32), with cold-rolled steel accounting for over 60%.
2. Thickness Range: Industrial-grade sheet metal panels are typically 0.5-3mm thick, while those used in the construction industry can reach up to 6mm. Thinner panels are prone to deformation, while thicker ones increase processing difficulty.
3. Applications: Electronic device casings (such as server chassis), automotive body parts (doors, hoods), and building curtain walls, with the automotive industry accounting for approximately 35% of demand.
Detailed Explanation of the Six Key Processes in Sheet Metal Processing
1. Cutting:
Laser Cutting: With an accuracy of ±0.1mm, it is suitable for complex contours and can cut carbon steel at speeds up to 15m/min (TRUMPF laser equipment technical specifications).
Stamping: Highly efficient, but with high tooling costs, suitable for mass production.
2. Bending:
Use a CNC press brake, with a bending angle tolerance of ≤0.5°. Calculate the unfolded dimensions (K factor is typically 0.3-0.5).
3. Punching/Tapping:
Hole diameter ≥ 1.2 times the plate thickness (to prevent cracking). M3-M12 threaded holes are most common.
4. Welding:
Argon arc welding is used for stainless steel, CO₂ welding is used for carbon steel. Weld strength must reach at least 90% of the parent material.
5. Surface Treatment:
Plastic spraying (thickness 60-80μm), electroplating (galvanized layer 5-8μm), and salt spray testing for 48 hours to meet standards.
6. Assembly:
Use snap-fit, riveted, or bolted connections, with a tolerance of ±0.2mm.
Of course, sheet metal panels are generally custom-made and are processed entirely according to the customer’s drawings. If you have large-scale sheet metal panel manufacturing needs, you can choose to cooperate with Mulan Group. Mulan Group has 12 years of sheet metal manufacturing experience and has helped customers in more than 30 countries complete the processing and production of various sheet metal components. Business support has been unanimously recognized and we look forward to your cooperation consultation.
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