More Details
Background & Customer Needs
TP2 copper tubing is a core material in refrigeration and thermal management systems due to its high thermal conductivity and excellent formability.
This project focused on producing bent and brazed copper tube assemblies used as refrigerant pipelines in:
- Household air conditioners
- Refrigerators and freezers
- Commercial water chillers
The customer required production-like prototypes to validate:
- Tube bending accuracy
- Brazed joint strength and sealing
- Compatibility with refrigerant pressure and temperature
Before scaling to mass production, functional verification was critical.
Key Challenges
Copper tube assemblies for refrigeration systems present several challenges:
- Precise bending control
- Tube deformation must be avoided
- Inner diameter must remain stable
- Reliable brazed joints
- No leaks under pressure
- Consistent joint penetration
- Thermal and pressure performance
- Tubes must handle temperature cycling
- Long-term reliability is required
The customer needed a rapid prototyping solution that could replicate real production conditions.
Rapid Prototyping Solution
TP2 Copper Tube Bending
High-purity TP2 copper tubes were formed using controlled bending processes.
This ensured:
- Smooth bend radii without cracking
- Stable inner flow diameter
- Accurate fit for system assembly
Tube geometry was adjusted during prototyping to optimize layout and reduce stress points.
Brazed Welding for Leak-Free Joints
All tube connections were joined using brazed welding, a standard method for refrigeration pipelines.
Advantages of brazing for this application:
- Strong metallurgical bonding
- Excellent sealing performance
- High resistance to vibration and pressure
- Each joint was visually inspected and prepared for pressure testing.
Key Features & Advantages
1️⃣High Thermal Conductivity
TP2 copper efficiently transfers heat, improving system performance in evaporators and condensers.
2️⃣Reliable Brazed Joints
Brazed connections provide long-term sealing and structural strength under pressure.
3️⃣Production-Like Prototyping
Processes match real manufacturing conditions, reducing risk during mass production.
4️⃣Flexible Design Iteration
Tube routing and bend angles can be adjusted quickly during prototype development.
Technical Specifications
| Parameter | Value |
|---|---|
| Material | TP2 copper tube |
| Tube Forming | Precision tube bending |
| Joining Method | Brazed welding |
| Application Pressure | Suitable for refrigeration systems |
| Thermal Performance | High thermal conductivity |
| Prototype Type | Functional pipeline assembly |
Application Scenarios
▶️Home appliances: Air conditioners, refrigerators, freezers, evaporator and condenser tubing
▶️Commercial cooling: Water chillers, industrial refrigeration units
▶️Automotive systems: Vehicle cooling and thermal management pipelines
▶️Marine systems: Fuel transfer and cooling pipelines for ships
Why This Case Matters
This case demonstrates the importance of production-accurate prototyping for refrigeration and fluid systems.
By validating copper tube bending and brazed welding early, customers can: Reduce leakage risk | Improve thermal efficiency | Avoid costly redesigns during mass production
Production Process & Quality Assurance
- DFM Review: Tube diameter, bend radius, and joint layout are reviewed before fabrication.
- Rapid Prototyping: Physical copper tube assemblies are delivered quickly for system testing.
- Leak & Integrity Checks: Visual inspection and basic pressure validation are performed.
- Quality Commitment: If brazed joints fail due to processing defects, rework support is provided.
