Sheet Metal Bending
The Junction Box serves as a robust enclosure designed to safeguard electrical connections,wiring,and terminals from external elements such as dust,moisture,and potential mechanical damage.These junction boxes are expertly crafted from sheet metal with precision techniques such as laser cutting,stamping,and bending.
Sheet Metal Bending Process
A targeted force is applied to a metal sheet to transform it into the desired configuration.
This process is typically executed using a press brake machine,which incorporates a punch and die to achieve precise bends.
Bending operations can be conducted on a variety of materials including stainless steel,aluminum,galvanized steel,and other resilient alloys.
Material Selection
Mild Steel (MS):Renowned for its strength and cost-efficiency,though it requires surface treatment to prevent rust.
Stainless Steel (SS304/SS316):With superior corrosion resistance,ideal for harsh outdoor and industrial applications.
Aluminum:Notable for being lightweight and corrosion-resistant,commonly used in electrical and aerospace industries.
Galvanized Steel:Comes pre-coated for reliable rust resistance,making it ideal for environments with high moisture levels.
Standard Sizes
Typically spans sizes from 100x100x50 mm to 400x400x200 mm,with options for custom sizing.
Equipped with mounting flanges or brackets for seamless installation.
Features & Components
Comes with pre-cut knockouts for easy cable entry (available in round,square,or conduit-friendly designs).
Featuring a lid with hinges or screw fasteners to facilitate easy maintenance.
Incorporates gasket sealing (IP65/IP66 rated) for enhanced waterproof and dustproof protection.
Equipped with earth/grounding terminals to ensure safety and prevent electrical hazards.

Parameter |
Specification |
Material |
Stainless Steel (SS304/SS316) / Galvanized Steel / Aluminum |
Finish |
Powder Coated / Brushed / Electro-galvanized |
Ingress Protection (IP Rating) |
IP65 / IP66 (Waterproof) / IP54 (General use) |
Mounting |
Wall-Mounted / Floor-Mounted |
Cover Type |
Hinged / Screw-On |
Door Locking |
Quarter Turn Lock / Screw Cover / Key Lock |
Gasket Type |
Neoprene / Silicone (for waterproof sealing) |
Cable Entry |
Pre-punched Knockouts / Custom Drilled Holes |
Certifications |
UL, CE, RoHS, ISO 9001 |
Standard Dimensions |
(For reference; actual sizes can be customized.) |
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Model No. |
Width (mm) |
Height (mm) |
Depth (mm) |
Material Thickness(mm) |
JB-200x200x100 |
200 |
200 |
100 |
1.5mm |
JB-300x300x150 |
300 |
300 |
150 |
1.5mm / 2mm |
JB-400x400x200 |
400 |
400 |
200 |
2mm |
JB-500x500x250 |
500 |
500 |
250 |
2mm / 2.5mm |
JB-600x600x300 |
600 |
600 |
300 |
2.5mm |
Electrical & Environmental Ratings
Operating Temperature: Designed for resilience, the Precision Fabricated Sheet Metal Junction Box by Shenzhen Wandaan Precision Technology Co., Ltd. is expertly crafted to withstand a wide range of temperatures, from an extreme -40°C to a scorching +80°C, ensuring uncompromised performance across diverse conditions.
Dielectric Strength: Engineered for robust safety, the junction box boasts a remarkable dielectric strength, enduring 1000V AC for a full minute, thereby offering superior protection in high-voltage environments.
Grounding Option: Complete with an integrated grounding stud, this junction box guarantees optimal stability and safety, making it an ideal choice for both medical and automotive applications.
Corrosion Resistance: Meticulously tested against salt spray, this product exemplifies endurance and resilience, proving its capability to safeguard marine environments with unmatched corrosion resistance.
Load Capacity: With a robust load capacity of up to 50kg, varying by size and material, this junction box is built to accommodate substantial weight requirements, ensuring versatility across multiple uses.
Applications of Sheet Metal Junction Boxes
Electrical Wiring Enclosures (Residential & Industrial)
Expertly crafted for precision and reliability, this junction box serves as an essential component in control panels and automation boxes, providing seamless integration for enhanced operational efficiency.
Outdoor & Marine Equipment Protection
Data & Communication Networks

Fabrication Process
Step 1: Laser Cutting (Sheet Metal Cutting)
Utilizing advanced fiber or CO2 laser technology, the metal sheet is expertly cut into a precise flat layout.
Cuts include:
Outer Profile:Carefully defines the overall shape of the junction box.
Cable Knockouts & Vent Holes:Ingeniously pre-cut for effortless wiring access.
Mounting Holes:Strategically placed for seamless wall or pole installation.
Advantages: Exceptionally high precision,immaculate clean edges,with minimal material wastage ensuring efficiency.
Step 2: Stamping & Punching (Creating Knockouts & Embossing)
Harnesses the power of stamping dies or CNC punching machines to:
Craft knockout holes for conduit or cable glands effortlessly.
Imprint embossed labels or markings such as grounding symbols,or electrical ratings with precision.
Fortify panels by incorporating reinforcement ribs for added strength.
Advantages: Speeds up processing with uniformly placed holes.
Step 3: Bending & Forming (Shaping the Box)
A press brake machine expertly bends the metal sheet into a robust 3D box structure.
Typical bends:
90° bends to elegantly form the box's sides.
Tabs & Slots crafted for precise alignment and seamless assembly.
Integrated Hinges & Brackets essential for securing the cover.
Considerations:
The bend radius must align with material thickness to prevent cracks.
A well-planned order of bending ensures smooth assembly without interference.
Step 4: Assembly & Fastening
Welding (Spot or TIG Welding):Skillfully fuses corners to achieve a seamless and polished finish.
Rivets or Screws:Utilized for designs where a detachable cover is desired.
Gaskets & Seals:Provide IP-rated waterproof protection, ensuring durability and safety.
Optional Add-ons:
Cable clamps,grounding terminals,and interior mounting plates for tailored customization.
Step 5: Surface Finishing (Protection & Aesthetics)
Powder Coating:Offers superior rust resistance,available in a spectrum of colors for aesthetic appeal.
Galvanizing:Applies a zinc coating for durable corrosion protection.
Anodizing (for Aluminum):This exceptional product significantly enhances durability and elevates the appearance, ensuring it not only stands the test of time but also impresses with its sleek design.
Electroplating (for Stainless Steel): Transform stainless steel with our premium electroplating process, delivering unmatched quality and a stunning finish.:With advanced technology, this feature substantially improves electrical conductivity, providing superior performance and reliability in every application.

Precision: We are passionately committed to delivering precision-engineered components that not only meet but consistently exceed our esteemed customers' expectations, ensuring unparalleled quality and performance.
Innovation: By fully embracing cutting-edge technological advancements, we continuously refine and elevate our processes and products, setting new standards in innovation and excellence.
Integrity: We steadfastly uphold the highest ethical standards in every business practice, fostering a foundation of trust and nurturing long-term, mutually beneficial partnerships with our valued clients.
Custom Manufacturing: We offer bespoke solutions meticulously tailored to meet your unique specifications and specific application requirements, ensuring perfect alignment with your needs.
Prototyping: Our rapid prototyping capabilities are designed to expedite product development and testing, facilitating swift innovation and time-to-market.
Surface Finishing: We provide a comprehensive suite of surface treatment options, including expert polishing, anodizing, and plating, to significantly enhance both the aesthetic appeal and functionality of your products.



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