This Punched Sheet Metal Enclosure Part is fabricated through precision cutting, punching, and bending to match specific installation requirements.
The structure and hole positions can be customized based on drawings or samples to support different equipment and mounting conditions.
It is suitable for OEM applications where consistent quality and reliable sheet metal manufacturing are required.
Material :
Hot-Dip Galvanized Steel (SGCC) / Electro-Galvanized (SECC)Thickness :
1.0mm – 3.0mm (Thicker gauge for pressure resistance)Surface Treatment :
Galvanized / Powder CoatingProcess Involved :
Laser Cutting, CNC Bending, Riveting, AssemblyProduct Overview
HPS manufactures this Custom Punched Sheet Metal Enclosure Part to serve as an internal support chassis for electronic devices.
The component is fabricated using Trumpf TruPunch technology to create ventilation cutouts and, most notably, extruded collars (plunged holes). These collars are tapped directly during production, providing integral threads that eliminate the need for welding nuts or inserting PEM fasteners.
We form the final U-shape on CNC press brakes, ensuring precise dimensional accuracy for mounting power supplies or cooling fans.

Key Features & Advantages
✨ Integrated Threading: The side flanges feature extruded and tapped holes. This "self-threading" design reduces the bill of materials (BOM) by removing loose hardware, speeding up the final assembly line.
✨ Precision Fitment: Designed as an internal structural part, tolerance control is critical. We maintain bending tolerances of ±0.1mm to ensure the bracket aligns perfectly with the main external housing and internal circuit boards.
✨ Material Conductivity: Manufactured from Electro-Galvanized Steel (SECC), the part maintains electrical conductivity for grounding purposes, which is essential for meeting EMC (Electromagnetic Compatibility) requirements in electronics.
✨ Burr-Free Fabrication: All punched edges and cutouts are deburred mechanically. This prevents damage to sensitive wires or cables that pass through the unit.
✨ Complex Forming: The part involves multiple bending operations in close proximity. Our Trumpf TruBend 5230 capability allows us to form short flanges and offset bends without deforming the pre-punched holes.
Product Specifications
| Product Name |
Internal Chassis Bracket / Fan Mount
|
| Material |
SECC (Electro-Galvanized), SPCC, Aluminum 5052
|
| Material Thickness |
0.8mm – 1.5mm (Precision Sheet Metal)
|
| Special Feature |
Extruded Tapped Holes (M3/M4)
|
| Cutouts |
120mm/80mm Fan mount, Cable pass-throughs
|
| Fabrication |
CNC Punching (NCT), Tapping, CNC Bending
|
| Surface Finish |
Natural (SECC), Degreased, or Conductive Chromate
|
| Equipment Used |
Trumpf TruPunch 5000, TruBend 5230
|
Applications
Manufacturing & Quality Assurance
All products are manufactured in our 30,000㎡ sheet metal facility equipped with advanced CNC punching, AMADA fiber laser cutting, automated welding robots, and automatic powder coating lines. Strict quality control is implemented under ISO9001 and ISO14001 management systems.
Company Strength
Xiamen Huapusheng Sheet Metal Manufacturing Co., Ltd. specializes in power control equipment and precision sheet metal fabrication. With 200+ employees, 36 engineers, and 32 patents, we serve global clients in the power, communication, and industrial sectors.

Customer Cases
We are a trusted OEM partner for global leaders across multiple industries, providing reliable components for their mission-critical applications.

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