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Latest Products

Custom Sheet Metal Enclosures & Parts

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Production Process – One‑Stop Sheet Metal Fabrication

About Us

Why Choose SanJun for Custom Metal Enclosures?

电源、储能系统、电动汽车和显示器用钣金外壳制造商

三骏五金成立于 2010 年,是一家专业的中国钣金加工服务提供商,专门从事配电柜、BESS 储能系统、电动汽车充电桩、自助服务终端和 HMI 显示设备的 OEM 和 ODM 定制外壳。
我们拥有5000平方米的工厂,为全球客户提供高精度定制钣金解决方案。

1. 核心专长

我们为以下设备定制钣金外壳:
  • 显示设备和自助服务终端
  • 教育和医疗设备
  • 配电和充电柜
  • 自动化设备外壳和储能系统
我们可将您的 CAD 图纸转换为成品钣金产品和橱柜,以便进行批量生产。

2. 一站式钣金服务

具备完整的内部加工能力:
  • 免费绘图设计和DFM技术支持
  • 数控冲压、激光切割和数控折弯
  • TIG/MIG焊接和自动铆接
  • 表面处理和完整组装
可提供完全组装好的外壳和钣金部件,可直接安装。

3. 生产规模与产能

  • 50名技术工人及专业工程团队
  • 先进设备:AMADA数控冲压折弯机、激光切割机、自动铆接机
  • 可灵活生产,满足原型订单和批量生产需求
  • 严格的质量检验和准时交付管理

4. 质量与竞争优势

  • 通过 ISO 9001:2008 (GB/T19001-2008) 认证
  • 每年将10%的利润再投资于研发和技术改进。
我们的优势在于质量稳定、价格实惠、交货周期短。我们是显示器、自助终端、电力和新能源行业值得信赖的长期供应商。
Our advantages:
  • Free Drawing Design Per Your Demand, Customizable
  • 24H DFM Quote, Fast Response & Sampling
  • No mold required, 1PC MOQ
  • Extensive Cases, Professional Fabrication
  • Military-grade quality, Affordable price
  • Qualified with ISO9001, EMC, LVD & RoHS standards
01

Precision & Dimensional Consistency

Tight tolerance guaranteed. Consistent dimension in mass production for perfect seamless assembly.
02

One-Stop Full Process Fabrication

In-house full service from design, laser cutting, bending, welding to coating and final assembly.
03

Stable Quality & On-Time Delivery

Certified stable quality with strict production control. Punctual delivery for long-term reliable cooperation.

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    1. Upload CAD Files

    Select your manufacturing process and upload 3D CAD files/drawings for custom sheet metal enclosures, cabinets or parts, including material, thickness and quantity.

    2. Get DFM Review & Quote

    Within 24 hours you receive a design‑for‑manufacturability check plus a detailed quotation with pricing and lead time for your sheet metal parts.

    3. Manufacturing Starts

    After approval, CNC punching, laser cutting, bending, welding, finishing and assembly are carried out in‑house according to your CAD and BOM.

    4. Quality Check & Shipping

    All parts and enclosures pass inspection, are securely packed, and shipped on time so they arrive ready for installation.

    5、No drawings available?

    Do not worry. Kindly share your requirements with us, and we will develop production-ready drawings free of charge according to your specifications.

    Latest News

    钣金和定制外壳的见解

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    Solve 2U server thermal & fitment issues with SanJun's precision sheet metal engineering. Request your free DFM review & custom quote today!
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    Arc-Resistant Switchgears Design & Sheet Metal Fabrication

    Build safer high-voltage cabinets with SanJun Hardware. Expert arc-resistant sheet metal design, DFM optimization & IEC/IEEE certified fabrication.
    Precision Alignment Solutions for Complex Multi-Interface Telecom Housings

    Precision Alignment for Multi-Interface Telecom Housings

    Eliminate tolerance stack-up with SanJun Hardware’s OEM/ODM precision telecom sheet metal housings. Achieve 0.01mm alignment & seamless EMI shielding!
    Cable Management Architecture in Modular Network Device Chassis

    Cable Management Framework in Modular Network Device Chassis

    Discover custom sheet metal chassis & cable management solutions that optimize thermal performance, prevent EMI, and boost serviceability with SanJun.
    Advanced Thermal Management Strategies for Outdoor Enclosures in Extreme Climates

    Thermal Management for Outdoor Enclosures in Extreme Climates

    Protect BESS & 5G equipment in extreme climates with SanJun Hardware’s custom thermal management sheet metal enclosures. Get a free DFM quote in 24 hours!
    Optimizing High-Density Rack Airflow and Duct Channeling in Custom Rack Enclosures

    Optimize High-Density Rack Airflow in Custom Rack Enclosures

    Discover custom rack enclosures with engineered duct channeling by SanJun Hardware to optimize thermal management, prevent throttling, and lower PUE.
    FAQ

    Frequently Asked Questions - Custom Sheet Metal Services

    FAQ-20260611
    Yes. We support 1PC MOQ, no mold tooling required. All custom sheet metal enclosures can be produced directly per your design.
    Yes, we accept custom sheet metal fabrication strictly based on your 2D/3D drawings. We provide free DFM checking, follow your exact material, tolerance and finishing requirements. Both prototype and mass production are available with full quality control and export standard packaging.
    Absolutely. Send us your product size, assembly function, usage scenario and performance demands. Our sheet metal team offers free structural design, solution tuning and DFM analysis. You don’t need to prepare drawings; we finish all design work from sketch to production drawing to save your R&D cost and risks. We revise drawings repeatedly to meet your assembly needs perfectly.
    We provide 24H DFM drawing review and formal quote after receiving your technical requirements.
    Yes. We offer fast prototype sampling according to your drawings, helping you verify structure and size before bulk order.
    All our products have obtained ISO9001, EMC, LVD and RoHS certifications. We fully comply with global safety and quality standards, delivering stable, trustworthy solutions for all project applications.
    We operate our own factory and provide one-stop full in-house production. Strict process control and standardized quality management guarantee stable product quality and punctual delivery, building reliable long-term global partnerships.
    We process a full range of standard and high-performance sheet metal materials, including stainless steel (304/316), aluminum (5052/6061), cold/hot rolled steel, galvanized steel, brass and copper. We can also source special materials according to your project requirements.
    Our standard machining tolerance is ±0.1mm for laser cutting and bending. For high-precision parts, we can reach ±0.05mm based on material thickness and part structure. All dimensions are 100% inspected before delivery to meet your requirements.
    Yes, we provide one-stop full surface treatment services, including powder coating, painting, anodizing, sandblasting, brushing, electroplating, passivation, polishing and heat treatment. We can customize colors and effects according to your design.
    Yes, we always sign NDA (Non-Disclosure Agreement) before receiving any drawings or design details from customers. We strictly protect your intellectual property and keep all your projects confidential.
    Latest Case

    Sheet Metal Case Studies | Custom Enclosure Projects

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    16+

    Years Experience

    5000+

    Square Meter Factory

    50+

    Cooperative brands

    2000+

    Types of accessories

    Testimonials

    What Our Clients Say

    全球客户对定制钣金外壳和一站式加工服务的真实反馈

    What Our Clients Say-01
    "±0.01mm positional accuracy for all interface cutouts. 470 units delivered 3 days early with zero defects. Unmatched precision for our 5G power modules."
    Service 9

    Olivia

    Chief Procurement Officer, Telecom Systems GmbH
    What Our Clients Say-02
    "Sanjun delivered 300 wall-mounted server chassis 4 days early with 100% quality pass rate. Their hybrid ventilation design solved our 24/7 overheating issue, and reinforced structure increased load capacity by 30%. After 6 months of flawless operation, we signed a 3-year exclusive agreement. They are our most reliable sheet metal partner."
    Service 10

    Darlene Robertson

    Engineering Director, DataEdge Solutions (USA)
    What Our Clients Say-03
    "Sanjun solved our toughest challenges: ±0.01mm multi-interface alignment, slim design with 20% enhanced strength, and consistent quality across 800 units. Delivered 4 days early with 100% pass rate. We signed a 2-year exclusive agreement."
    Service 1

    Chloe

    Product Manager, ProAV Solutions (Australia)
    What Our Clients Say-04
    "Sanjun solved all our core challenges: 3.4cm ultra-slim design with 22% higher rigidity, ±0.01mm interface alignment, zero color difference across 1,000 units, and efficient honeycomb cooling. Delivered 5 days early with 100% pass rate. We signed a 3-year exclusive agreement."
    Service 2

    Ethan

    General Manager, Smart Electronics (Singapore)
    What Our Clients Say-05
    "Sanjun solved all our critical challenges: 4.5cm slim rack design with 25% enhanced rigidity, ±0.01mm complex interface alignment, zero color difference across 190 units, and efficient honeycomb cooling. Delivered 2 days early with 100% pass rate. We signed a 2-year exclusive agreement."
    What Our Clients Say-05-1

    David Miller

    Technical Director, ProAV Media (Germany)
    Testimonials7
    Fast, professional and high quality. Looking forward to long term business. Thank you!
    Service 4

    Lucas

    consumer
    Testimonials8
    I am very happy with the product I received. it was exactly as described and very well manufactured. Will do business again.
    Service 5

    Eli

    consumer
    Testimonials9
    I'd like to thank you and the team at Sanjun for delivering a nicely product to us and on time. We are very pleased with the product and you will get our future business.
    Service 6

    Tom

    consumer
    Testimonials5
    Sanjun is professional, making sample and mass production cargo Quality is very good! Smooth finish, no scratches. Good packing, no damage during shipment. I'll come back to order again.
    Service 7

    Mia

    consumer
    Testimonials6
    Sunjun is professional, making sample and mass production cargo Quality is very good! Smooth finish, no scratches. Good packing, no damage during shipment. I'll come back to order again.
    Service 8

    Darlene Robertson

    consumer
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