プロジェクトの背景
With the rapid expansion of smart building and industrial automation systems, a leading safety and control equipment manufacturer launched a targeted customization project in 2026 for control box enclosures. These enclosures are critical for protecting internal control modules, sensors, and communication interfaces, requiring stable performance in both commercial and industrial environments.
主な要件は次のとおりです。
- IP 54防塵防水
- 寸法公差≦±0.03 mm
- Durable, corrosion-resistant surface finishes
- Compact design for wall-mounted installations
- Compatibility with standard control components and mounting hardware
- 安定した量産品質
- High-visibility color coding for safety applications
Sanjun Hardware was selected for its precision sheet metal technology, professional surface treatment capabilities, and proven track record in industrial control enclosure customization.
コア部品製造プロセス
The control box enclosure consists of the main enclosure, front control panel, rear mounting plate, and integrated hinge assembly. All production follows ISO 9001 quality standards and industrial control enclosure specifications.
1.材料選択と、前処理
- メインハウジングと、パネル：1.0 mm冷間圧延亜鉛めっき鋼板、高い構造強度と基本耐食性を持つ。
- 前処理：全自動超音波脱脂、錆除去とリン化、洗浄、高付着力の表面基材を形成し、静電粉末塗料の理想的な選択である。
2.コア製造プロセス
- Precision Laser Cutting: 8000W fiber laser cutter with ±0.02mm tolerance, using nitrogen assist gas to minimize heat distortion and maintain material integrity. This ensures accurate cuts for sensor holes, keypad cutouts, and display windows.
- CNC Bending & Forming: 9-axis CNC bending machine with custom jigs, ensuring springback ≤0.02mm and consistent structural dimensions. This is critical for the precise alignment of the hinge assembly and the tight fit of the front panel.
- Precision Hole Processing: Laser positioning and CNC punching technology are used to ensure the accuracy of component mounting holes, sensor openings, and ventilation slots within ±0.01mm. This guarantees seamless integration with internal control modules.
- せいでんふんまつふきつけ
- Assembly & Sealing: Heavy-duty stainless steel hinges are integrated into the enclosure for reliable door operation. High-density foam gaskets embedded in the enclosure seams ensure a tight seal, while reinforced mounting brackets with precision holes enable secure wall installation.
3.品質管理と、テスト
- Dimensional inspection: CMM measurement to confirm tolerance ≤±0.03mm and compatibility with standard control components.
- IP 54保護試験：IEC 60529標準に基づいて防塵防水試験を行う。
- Coating test: Adhesion, hardness, and corrosion resistance testing for both white and red powder coatings.
- Hinge durability test: Repeated door opening and closing cycles to ensure long-term reliability.
- 全機能検査：納品前に100%検査し、欠陥がない。
プロジェクトの課題と、ソリューション
1. Challenge: Precision Alignment of Multi-Component Openings
The control box features a complex front panel with multiple openings for sensors, keypads, and displays, requiring extremely high precision to ensure seamless component integration.
解決策: We used a combination of laser cutting and CNC punching with real-time positioning feedback. Pre-production sample assembly was conducted with the client’s hardware to verify fit before mass production, ensuring all components aligned perfectly.
2. Challenge: Durable Two-Tone Surface Finish
The requirement for a two-tone finish (white front, red body) with high corrosion resistance posed challenges in coating adhesion and color consistency.
解決策: We implemented a multi-stage coating process with precise masking to achieve clean color separation. Both coatings were selected for their superior adhesion and weather resistance, and each unit underwent a cross-hatch test to verify coating integrity.
3. Challenge: Reliable Hinge Assembly
The enclosure must support repeated door operation over its lifespan, requiring a robust and durable hinge system.
解決策: We integrated heavy-duty stainless steel hinges with reinforced mounting points. Each hinge assembly was torque-tested and subjected to 10,000+ opening/closing cycles to ensure long-term reliability.
4. Challenge: High Consistency in Small-Batch Customization
The customer required 500 units with uniform appearance, size, and performance across all units.
解決策自動ラインおよび統計プロセス制御（SPC）は、加工パラメータをリアルタイムで監視するために使用される。25ユニットごとにサンプリング検査を行い、寸法、表面仕上げ、機能性能の安定性を確保した。
プロジェクトの成果
- Delivery: 500 units completed and delivered 5 days ahead of the 35-day schedule, with a 100% pass rate in all tests.
- Performance: Enclosures operate stably in both commercial and industrial environments, with no corrosion, coating failure, or structural issues reported. The high-visibility red and white color scheme has improved safety and usability for end-users.
- Partnership: The client signed a 3-year strategic cooperation agreement, appointing Sanjun Hardware as the exclusive sheet metal enclosure supplier for its full line of control box products.
