Instrument sheet metal housings are metal shells used to enclose and protect the internal components of instruments.
They are primarily manufactured using sheet metal processing techniques and provide functions such as protection, shielding, heat dissipation, and aesthetics. Examples include electronic instruments, factory instruments, and various precision instruments.
Common Materials
Cold-rolled steel sheet (SPCC): Low cost, good processing performance, commonly used for general instrument housings. The surface usually requires spraying or galvanizing for rust prevention.
Stainless steel sheet (SUS304/316): High corrosion resistance, suitable for medical, chemical, or humid environments, but the material cost is high and processing is difficult.
Aluminum alloy sheet (A5052/6061): Lightweight, good heat dissipation, commonly used for precision instruments requiring lightweight design or high heat dissipation.
Galvanized steel sheet: Superior corrosion resistance to ordinary carbon steel, can be used directly without additional electroplating, suitable for outdoor or general industrial environments.
What are the processing techniques?
Material cutting: Commonly used methods include laser cutting, CNC punching, or shearing. Laser cutting accuracy can reach 0.1mm, suitable for complex shapes.
Bending: Flat parts are bent into 3D structures. The bending sequence must be followed to avoid interference. Bending accuracy is typically controlled within ±0.1mm.
Welding: Includes CO2 welding and TIG welding. TIG welding is used for stainless steel and aluminum plates, producing more aesthetically pleasing welds but at a higher cost.
Surface treatment: Common methods include electrostatic powder coating, sandblasting, oxidation, and wire drawing. Powder coating offers color options and enhances corrosion resistance.
Assembly: Involves riveting, bolt connections, and snap-fit connections. Some high-end housings use modular designs for easy disassembly and maintenance.
What should be considered during design?
Heat dissipation design: Appropriate ventilation openings or heat sinks should be designed according to the instrument’s heat generation to ensure normal operation.
Electromagnetic shielding: If the instrument is sensitive to electromagnetic interference, grounding or shielding measures must be used to avoid interference.
Safety Clearance: A 3-5mm safety clearance should be maintained between the inner wall of the enclosure and rotating parts to avoid friction or interference.
Installation and Maintenance: The design should facilitate installation and disassembly, avoiding sharp corners that could cause injury. Side panels often feature a detachable structure for easy maintenance.
Precision Control: The bending springback and tolerances of sheet metal processing must be considered to avoid designs that are impossible to manufacture or excessively costly.
If you have a large-scale demand for custom sheet metal enclosures, you can entrust the production to Mulan Manufacturing Group. Mulan Manufacturing Group has 13 years of experience in sheet metal parts manufacturing and processing, and has long-term export experience to Europe, America, Japan, and South Korea. We have complete certifications and look forward to your cooperation and inquiries.
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