Hebei CBIES Automotive Parts Co., Ltd. is one of the reliable manufacturers and suppliers in China. As a specialized factory, we focus on manufacturing trunk hinges tubes with consistent quality, competitive pricing, and reliable supply for global markets.
Specification
| Material Standard： JIS G3141/JIS G 3131 | Material Grade： SPCC/SPHC |
| Tube Specification：22x22x1.6,25x25x2.0,25x30x2.0,22x22x2.0,25.4x25.4x2.4,20x20x2.0 | |
Dimension Tolerances
| Item | Tolerance |
| Outside Diameter Tolerance | ±0.1mm |
| Thickness Tolerance | ±0.05mm |
| R Angle | 1.5t (thickness) |
| Inner Surface | Clean the internal welding seam |
Our Trunk hinge tubes are engineered to meet the highest standards of performance and durability, ensuring reliability for automotive applications. As a trusted supplier for OEMs and Tier 1 manufacturers, we prioritize precision in every step of our production process, from raw material sourcing to final inspection. Whether for the automotive industry or other high-demand sectors, our products are built to last and meet your specific needs.
Surface Treatment
Ensuring optimal surface quality is essential for both functionality and aesthetic requirements. Our Trunk Hinges Tubes undergo rigorous surface treatments, ensuring that they are ready for further processing and finishing.
1. Anti-Rust Protection: Unless otherwise specified, all steel sheets and strips used in our tubes are coated with high-quality anti-rust oil. This ensures that the materials remain free from surface defects that could affect the machining process or compromise the product's appearance. Our protective oil coating also enhances long-term corrosion resistance.
2. Plating and Painting Readiness: The surface of our tubes is specially prepared for easy plating and painting treatments, making it suitable for custom finishes as required by automotive manufacturers. This ensures that the final product not only functions well but also meets the highest aesthetic standards.
Square Tube Process Flow
The production of our Trunk Hinges Tubes follows a highly automated and precise process to ensure consistent quality. The process flow includes:
A. Raw Material
We use premium-grade steel from trusted suppliers, ensuring the raw material meets stringent specifications.
B. Inspection
All materials are inspected upon arrival to ensure they are free from defects.
C. Slitting
Steel strips are slit to the required width.
D. Inspection
Post-slitting, another inspection is carried out to ensure the strips meet dimensional accuracy.
E. Cutting & Butt Welding
The steel is then cut to the necessary length, and butt welding is applied where required.
F. Storing
Cut and welded steel is stored in controlled conditions.
G. Forming
The material is formed into the desired square tube shape using state-of-the-art equipment.
H. High-Frequency Welding
KTM high-frequency welding equipment ensures high weld accuracy and durability.
I. Inner & Outer Burr Removal
Precision burr removal is carried out to ensure smooth edges.
J. Eddy-Current Detection
Advanced eddy-current technology is used to detect any material defects, ensuring no faulty products pass through.
K. Sizing
The tubes are sized according to the exact specifications required by our customers.
L. Flying Cutting
High-speed cutting ensures efficiency without compromising precision.
M. Inspection
Final inspection ensures that all tubes meet dimensional and quality standards.
N. Packing
Products are packed with care to ensure safe delivery to customers.
Our Strengths & Advantages
1. Raw Materials
We have long-standing partnerships with leading steel manufacturers such as Baosteel, ShouGang, and HBIS. The steel we source from these suppliers is known for its stable performance and smooth surface, making it ideal for further surface treatments like painting and plating.
2. Advanced Equipment
Our production line is equipped with high-frequency welding machinery imported from South Korea, specifically the KTM production line. Using W-bending forming technology, we achieve high accuracy in weld seams, resulting in excellent welding quality and burr precision. Our highly automated machinery is capable of producing tubes in a wide range of dimensions to meet customer requirements.
3. Stringent Inspection
We utilize online eddy-current detection systems that automatically detect and remove non-conforming parts, ensuring only the highest quality products reach our customers.
4. Trusted by Top OEMs
We are proud to supply leading automotive manufacturers such as Volkswagen, General Motors, and FAW, as well as other Tier 1 suppliers. Our reputation for delivering reliable, high-quality components has earned us long-term partnerships with these global brands.
5. Post-Machining Services
In addition to providing straight square tubes, we offer post-machining services including drilling, bending, and more.
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