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The vacuum annealing furnace for copper tubes is specifically designed for the annealing process of copper tubes under vacuum conditions. Ensuring precise temperature control and a controlled vacuum atmosphere optimizes the material's crystal structure. The equipment effectively eliminates work hardening, enhances degassing performance, and significantly improves the mechanical properties and surface finish of copper tubes. It is ideally suited for high-precision power, refrigeration, and electronics industries.
Technical Specifications
Item | Specification |
|---|---|
Furnace Chamber Size | φ360 × 6400 mm |
Maximum Operating Temperature | 900 ℃ |
Continuous Operating Temperature | 850 ℃ |
Voltage & Rated Power | 380V, 3-phase, 50Hz, 248.2 kW |
Temperature Control Accuracy | ±1 ℃ |
Temperature Uniformity | ±5 ℃ |
Thermocouple | K-type thermocouple, PID continuous temperature control |
Heating Element | OCr25Al5 resistance wire |
Vacuum System | 2X-70 rotary vane pump with main valve, cold trap, valve assembly, and vacuum piping |
Cooling System | Flange-type water-cooled sealing device with imported sealing rings |
System and Configuration
Control System
- 10-inch LCD touchscreen with real-time temperature rise curve display
- Siemens PLC automated control system
- Integrated automatic control of vacuum, atmosphere, and heating systems
- Alarms for over-temperature, thermocouple failure, and atmospheric pressure anomalies
- Temperature data export via USB interface
Mechanical Structure
- Furnace Lining: High-purity polycrystalline alumina fiber, density 400 kg/m³
- Furnace Base: Constructed from channel steel and A3 steel plates, designed with heat-resistant air ducts
- Movable Carriage: Driven by cast steel wheels, runs on tracks at a speed of 5–7 m/min
- Retort: Double-layer structure made of stainless steel (309S + 321)
- Cooling System: Includes ventilation ducts and back-blow device for enhanced cooling efficiency
Process Flow
Loading → Primary Vacuuming → Nitrogen Purging → Heating → Oil Fume Exhaust → Soaking → Cooling with Gas Refill → Unloading
Key Features and Advantages
Vacuum Environment for Oxidation Prevention
Prevents surface discoloration of copper tubes, ensuring a bright and clean surface quality
Eliminates the risk of hydrogen embrittlement, offering superior performance compared to traditional hydrogen atmosphere annealing
Intelligent Temperature Control System
Siemens PLC with 10-inch touchscreen, supporting programming of up to 30 process curves and data export for analysis
Temperature control accuracy of ±1 °C, uniformity of ±5 °C, with automatic power cut-off for over-temperature or thermocouple failure
High-Efficiency Heating & Energy-Saving Design
Utilizes OCr25Al5 high-oxidation-resistant wires with multi-sided heating for extended service life
Dual-layer ceramic fiber chamber structure minimizes heat loss and promotes energy efficiency and environmental friendliness
Automated Operation & Safety Protection
One-touch full-process operation (vacuum pumping → nitrogen purging → heating → cooling), allowing for up to 72 hours of unattended operation
Triple alarm system (over-temperature / abnormal pressure/thermocouple failure), equipped with a circuit breaker and leakage protection
Customized Cooling System
Water-cooled sealing with nitrogen back-blowing technology for rapid cooling (rate ≤10 °C/min), enhancing production efficiency.
Applications
Industry | Typical Applications |
|---|---|
Power Industry | Annealing of copper tubes used in cables and transformers |
Refrigeration | Forming and heat treatment of condenser tubes for air conditioners and refrigerators |
Electronics | Precision processing of heat sinks and connectors |
Aerospace | Manufacturing of high-purity copper conduits |
New Energy | Processing of copper tubes for solar modules and battery systems |
