Precision Aluminum Duct CNC Cutting and Manufacturing – Factory Customization

Precision Aluminum Duct CNC Cutting and Manufacturing – Factory Customization

Aluminum ducts are widely used in building ventilation, central air conditioning, and industrial exhaust systems due to their advantages of lightweight, corrosion resistance, and easy processing. Their manufacturing process integrates precision sheet metal processing and surface treatment technologies, ensuring excellent sealing and aerodynamic performance. This article will detail the material selection, processing technology, and industry applications of aluminum ducts.

Product Description 

Key Processing Technology of Aluminum Ducts
1. Material Selection and Pre-treatment
Aluminum ducts are mainly made of 3003 or 5052 aluminum alloy, due to their excellent plasticity and corrosion resistance.
3003 aluminum alloy: Suitable for general ventilation systems, with a tensile strength ≥145 MPa, meeting the requirements of low-to-medium pressure ducts.
5052 aluminum alloy : Higher strength (tensile strength ≥210 MPa), suitable for high-pressure or vibration environments, such as ship and chemical plant exhaust systems.
Before processing, the sheet metal needs to be degreased and passivated to improve the bonding strength for subsequent welding or riveting.

Precision Aluminum Duct CNC Cutting and Manufacturing – Factory Customization

2. CNC Sheet Metal Processing
The shaping of aluminum ducts relies on high-precision CNC equipment. The main processes include:
Laser cutting/CNC punching: Using a fiber laser cutting machine (cutting accuracy ±0.1 mm) or a CNC multi-functional punch press to efficiently process various shapes of duct panels.
Bending: Using a CNC bending machine to bend the sheet metal into rectangular, circular, or spiral duct structures (bending angle accuracy ±0.5°). The bending radius must be greater than or equal to 1.5 times the thickness of the sheet metal to prevent cracking. Connection/Welding Process:
Low-pressure duct connection: Using TDF flanges or standard plate flanges to ensure airtightness.
High-pressure duct argon arc welding: Using an AC TIG welder to ensure the weld strength is not less than 90% of the base material strength.

3. Surface Treatment and Enhancement
Anodizing: Forms a 5-20μm oxide film to enhance corrosion resistance. Available colors: silver, champagne gold, etc. Powder coating: Epoxy resin powder coating (60-80μm thickness) is used, suitable for corrosive environments such as chemical plants and food processing facilities.
Sound-absorbing lining: For noise-sensitive areas (such as hospitals, recording studios, etc.), a sound-absorbing material (such as polyurethane foam) can be applied to the inner wall of the pipe.

Company Profile

         We are a manufacturer integrating industry and trade. We have more than 20 years of experience in production technology. We are located in Dongguan City, Guangdong Province, China. We have advanced high-end professional production and processing technology, and are committed to innovative R&D and production. After years of market tempering and exploration, it has high-quality technical management personnel, experienced designers, R&D personnel and a perfect company management system.

5-axis CNC workshop

         Our factory has a plant area of about 2,000 square meters and masters core processing technologies. It has high-end precision production equipment: CNC lathes, 5-axis CNC, 4-axis CNC, stamping equipment, die-casting equipment, etc.​

Auxiliary production equipment: electroplating, anodizing, hard anodizing and surface treatment. We have complete testing equipment: sophisticated three-dimensional testing, two-dimensional testing, hardness tester, height meter, projector and other conventional testing equipment. If you are interested in our products, please contact me and I will provide the best price support and quality service.

Our Advantages

         We cooperate with many high-quality material suppliers, and the quality is very guaranteed. Please feel free to choose our materials. At the same time, supporting documents can be provided for all materials. Materials are available, such as aluminum alloy, steel alloy, carbon steel, stainless steel, copper, brass, titanium alloy, bronze, nylon, acrylic, etc. Aluminum 6061/6063/7075; Iron 1215/45/1045; Stainless steel 303/304/316; Copper; Brass; Bronze (H59/H62/T2/H65); Plastic POM/PE/PSU/PA/PEEK, etc. can be based on Customer requirements.

surface treatment

          For surface treatment, our suppliers have been working with us for many years. They have rich experience and are familiar with all the quality requirements of each other. The quality is stable and more guaranteed. Such as: heat treatment, spray painting, powder coating, blackening, silver/gold plating, electrolytic polishing, nitriding, phosphating, nickel/zinc/chromium/TiCN plating, anodizing, polishing, passivation, sandblasting, galvanizing, heat treatment , hardening, laser marking, etc. according to customer requirements. 

Product Packaging

Packaging Details

1. Commercial packaging: 1pc/plastic bag + color box +carton + pallet;
2. Industrial packaging: (1). plastic tube + carton + pallet; (2). plastic bag + kraft paper + carton + pallet;
3. According to the requirement of customer.

FAQ

Q1: Where can I get product & price information?

A1: Send us an inquiry e-mail, we will contact you once we received your mail.

Q2: How long will I get the sample?

A2: Depends on your specific items, within 3-7 days generally.

Q3: What kinds of information do you need for a quote?

A3: Kindly please provide the product drawings in PDF, if provide in STEP or IGS will be better.

Q4: What are the payment terms?

A4: We accept 50% as a payment deposit, when the goods are prepared, we shoot photos or videos for your check, and then you can pay the balance. For small quantities, we accept Paypal, the commission will be added to the order. For big amounts, T/T is preferred.

Q5: How to deliver the goods?

A5: We deliver the products by courier company.

Q6: Are you a trading company or factory?

A6: We are factory direct with 17 experienced engineers and more than 50 employees as well approximate 3,000m2 workshop area.

Q7: What shall we do if we don’t have drawings?

A7: Please send your sample to our factory, then we can copy and provide you better solutions. If send us pictures or drafts with dimensions(Length, Height, Width), CAD or 3D file will be made for you.

Q8: Can we get some samples before mass production?

A8: Absolutely yes.

Q9: Will my drawings be safe after sending them to you?

A9: Yes, we will keep them well and won’t release them to the third party without your permission.

Q10: Is it possible to know the operation status of my products without visiting your company?

A10: We will offer a detailed production schedule and send weekly reports with digital pictures and videos which show the machining progress.

Q11: If you make poor quality goods, will you refund?

A11: In fact, we won’t take risks to produce poor-quality products. Meanwhile, we manufacture good quality products till you are satisfied.