Product Introduction
Square carbon fiber tube is a composite material tube with a square cross section, which is made of high-strength carbon fiber and resin composite curing. It is commonly used in drone racks, automation equipment brackets, robot skeletons, sports equipment and other equipment.
Product Parameters
|
Parameter |
Value |
|
Strength |
T300 (customizable T700, T800) |
|
Surface |
3K (customizable 1K/1.5K/12K/24K) plain/twill Matte/Glossy |
|
Density |
≈ 1.65 g/cm ³ |
|
Compressive strength |
≥ 1200 MPa |
|
Bending strength |
≥ 1600 MPa |
|
Elastic modulus |
130 ± 5 GPa (axial) |
|
In plane shear strength |
≥ 95 MPa |
|
Thickness |
0.5-8.0mm (customizable) |
|
Temperature |
-40 ° C to+120 ° C |
Product Features
High Dimensional Accuracy
Our square carbon fiber tube is produced by precision mold pultrusion molding process, which controls the dimensional error within ±0.1mm and the wall thickness uniformity is as high as 95% or more, which means that it can be used directly during equipment assembly without secondary machining or adjustment.
Lightweight And High Strength
The density of square carbon fiber tube is only 1.5g/cm³, which is about 60% of aluminum alloy and 20% of steel, but it has a compressive strength of up to 1200 MPa and a bending strength of more than 1600 MPa. While meeting the structural strength requirements, it can reduce the weight of the equipment by 30%-50%.
Multi-Directional Display of Product Details
Our square carbon fiber tubes are produced using patented "corner reinforcement technology" (CRT) to solve the problem of insufficient corner strength in traditional square composite pipe materials. Microstructure analysis shows that this technology reduces the deviation of fiber arrangement at the corners by 85%, reduces the resin enrichment zone by 73%, and significantly improves the stress concentration resistance of the corners.
The processing accuracy of square carbon fiber pipes is strictly controlled, with cross-sectional dimension tolerances of ± 0.2mm (≤ 50mm) and ± 0.3mm (>50mm), and diagonal differences of ≤ 0.3mm (≤ 50mm) and ≤ 0.5mm (>50mm), far exceeding industry standards. The inner and outer surface smoothness Ra ≤ 1.6 μ m ensures aesthetics and contact performance.
Our square tubes offer a variety of surface treatment options, including standard 3K/12K plain/twill visible carbon fiber textures, as well as customized UD unidirectional surfaces, matte/glossy coatings. The cutting end face of each pipe is precision processed, and the perpendicularity of the end face is controlled within ± 0.5 ° to ensure precise alignment during connection.
The specialized connection system developed by the company includes inner fittings, corner fittings, and flat connection plates, which perfectly match with square pipes and provide a theoretical strength of 98% after assembly, far higher than the 75-85% strength retention rate of general connectors.
Product Qualifications
Our company's carbon fiber raw materials have all passed aviation grade quality certification, and each batch undergoes strict incoming inspection, including single filament tensile testing, density testing, and surface treatment evaluation. The production equipment includes precision molding equipment and temperature control systems imported from Germany, with corner molding accuracy controlled within ± 0.1mm to ensure consistent product quality. The entire production line adopts a constant temperature and humidity environment (23 ± 2 ° C, 50 ± 5% RH) to reduce the impact of environmental factors on product quality.
Our company conducts strict quality inspections on every batch of products, including tensile testing, compression testing, bending testing, torsion testing, corner strength testing, impact testing, fatigue testing, dimensional testing, and thermal cycling testing.
Our company has passed ISO9001:1995, as well as CE and ROHS certifications, ensuring that we provide customers with high-quality and environmentally friendly products.
Attentive Service and Worry-Free After-Sales Service
Our company provides a comprehensive solution for square carbon fiber tubes:
Structural design consulting: providing structural optimization suggestions based on the characteristics of square pipes
Finite element analysis: providing professional mechanical analysis and simulation services
Connection scheme design: Design the optimal connection solution based on application requirements
Processing services: providing precision cutting, drilling, slotting and other processing services
Customized size: Customize non-standard sizes and wall thickness according to customer needs
Surface treatment: providing special surface treatment and coating services
Technical training: Provide customers with training on the application and connection technology of carbon fiber square tubes
Sample Trial: Provide sample testing and evaluation services
Technical support: Provide 24/7 technical consulting services
FAQ
Q: What is the strength of the corner? How to avoid stress concentration problems?
A: The traditional square composite material pipe does have the problem of stress concentration at the corners, and our company has solved this problem through the "corner reinforcement technology" (CRT). Tests have shown that the corner strength of our square tube reaches 92% of the planar strength, exhibiting a progressive failure mode rather than sudden fracture under ultimate load, with a safety factor increased by 1.4 times.
Q: What are the connection methods?
A:① Adhesive connection ② Mechanical connection ③ Inner sleeve connection ④ Special joint connection. Our technicians will provide the best advice for your project.
Q: How does cost and long-term value compare to metal square tubes?
A: The initial purchase price is indeed higher than that of metal materials: 3-5 times higher than aluminum alloy square tubes and 5-8 times higher than steel tubes. However, it has significant advantages in terms of performance, lifespan, and system cost, with a better overall cost-effectiveness.
Q: What is the bending strength of square carbon fiber tubes?
A: The bending strength of square tubes made of standard T300 material can reach 1600MPa, which is about 1.3 times that of round tubes with the same cross-sectional size. It is suitable for high-rigidity frames and structural parts subjected to lateral forces.
Q: What kind of carbon fiber raw material is used? Can a higher grade be selected?
A: It is conventionally made of T300 raw silk, and it can be upgraded to carbon fiber with higher tensile strength such as T700 and T800.
Q: What are the surface textures? Are there optional colors or treatments?
A: The surface can be selected as 3K plain weave and twill, and the surface treatment includes gloss, matte, frosted, etc. If there are special needs, color coating or printed LOGO can be customized.
Q: Can this kind of pipe be used directly for structural connection? Is it easy to process?
A: Square carbon fiber tubes can be drilled, cut, and polished, and are suitable for screw fixing and snap connection.
Q: Can it be supplied in bulk? How long is the delivery time?
A: Supports mass production, regular specifications are in stock, and small batch orders can be shipped within 3-5 days; customized products are generally delivered within 7-15 working days according to specific requirements.
Company News
Our newly developed high modulus square carbon fiber tube has completed testing and certification, and the product can be widely used in aerospace, precision instruments, high-end manufacturing and other fields.
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