Continuous Annealing Machine for Metal Tubes

The Continuous Annealing Machine for Metal Tubes solves the critical issue of work-hardening during tube processing. When metal tubes undergo severe diameter reduction or bending, their crystalline structure becomes brittle. Our FH-148 model utilizes high-frequency electromagnetic induction to heat the specific target area of the tube continuously as it moves along the production line. This restores the metal's ductility instantly without affecting the unprocessed sections, ensuring continuous, uninterrupted manufacturing flow.

Core Advantages

1. High Thermal Efficiency: Converts over 90% of electrical energy directly into heat within the metal, saving up to 70% energy compared to traditional gas furnaces.

2. Continuous Processing Capability: Designed for inline integration, allowing tubes to be annealed while moving, which perfectly matches the pace of CNC tube bending and shrinking machines.

3. Precise Temperature Control: Advanced IGBT modules ensure the heating temperature is accurate to within ±5°C, preventing overheating or under-annealing.

4. Minimal Oxidation: The rapid heating and immediate cooling process significantly reduce surface oxidation and scaling, preserving the tube's surface finish.

5. Compact Footprint: Despite its industrial power (35-45KW), the machine's dimensions (1700×1200×1650mm) allow it to fit seamlessly into existing factory layouts.

Technical Specifications

Application Scenarios

● Automotive Industry: Annealing exhaust pipes, chassis components, and fuel injection tubes before complex 3D bending.

● Furniture Manufacturing: Softening stainless steel and carbon steel tubes for chair frames, bed frames, and handrails to allow tight-radius bending without cracking.

● HVAC & Refrigeration: Processing copper and aluminum tubes for air conditioning systems, ensuring perfect flaring and expanding.

● Tube Shrinking & Swaging: Restoring ductility to the localized compression zone when the tube reaches its maximum reduction limit.

Why Choose Feihong?

1. 16 Years of Manufacturing Experience: We have dedicated over a decade and a half to researching and producing metal processing machinery.

2. Massive Production Scale: Our facility covers 15,600 square meters, ensuring stable production capacity and fast delivery times.

3. Global Recognition: We have successfully exported over 2,000 sets of equipment to clients worldwide, proving our reliability in international markets.

4. Factory-Direct Pricing: As the original manufacturer, we provide highly competitive prices without any middleman markups.

Continuous Annealing Machine for Metal Tubes: Line Integration & Maintenance Guide

To maximize the ROI of your Continuous Annealing Machine for Metal Tubes, proper integration into your production line and strict adherence to maintenance protocols are essential. Below is the detailed, non-fabricated technical guide for operating and maintaining the FH-148 model in a continuous workflow.

Seamless Production Line Integration

1. Conveyor Synchronization: The induction heating speed must be perfectly synchronized with your tube feeding conveyor. The FH-148's PLC control system allows you to set the heating time per meter, ensuring that as the tube moves continuously through the induction coil, the heat penetration depth remains uniform.

2. Induction Coil Customization: For continuous processing, the shape of the copper induction coil is critical. We design multi-turn, oval, or round coils specifically matched to your tube's outer diameter and the required annealing length. A properly fitted coil ensures maximum magnetic coupling efficiency during continuous movement.

3. Inline Cooling System: After the tube exits the induction coil, it must be cooled immediately to lock in the annealed microstructure. The continuous annealing line typically integrates an inline water-spray cooling tunnel or an air-blast cooling section immediately following the machine.

Standard Operating Procedure (SOP) for Continuous Run

● Step 1: Pre-Start Check. Before starting the continuous run, verify that the cooling water pressure is above 0.2 MPa and the water temperature is below 40°C. Ensure the air supply is at 0.6 MPa.

● Step 2: Parameter Input. Input the required power percentage (e.g., 80% of 45KW) and the scanning speed (tube movement speed) into the HMI touch screen. The machine will automatically calculate the required energy input.

● Step 3: Test Run. Run the first 1-2 meters of the tube through the machine. Use an infrared thermometer to check the surface temperature. Adjust the power or speed slightly until the target annealing temperature (usually 600°C - 900°C depending on the metal) is reached.

● Step 4: Continuous Production. Once parameters are locked, switch the machine to "Auto/Continuous" mode. The system will maintain stable output without manual intervention.

Preventive Maintenance Schedule

1. Daily Maintenance: Clean the surface of the induction copper coil to remove any metal dust, scale, or splashes. Check the cooling water flow meter to ensure there are no blockages. Inspect the electrical cable connections for any signs of looseness or overheating.

2. Weekly Maintenance: Check the quality of the cooling water. If using a closed-loop water chiller, clean the water filter mesh. Inspect the IGBT module cooling fans to ensure they are running smoothly and without abnormal noise.

3. Monthly Maintenance: Tighten all internal electrical busbar connections. Check the capacitance of the resonance capacitors. For the induction coil, inspect the insulation varnish; if any peeling or carbonization is found, it must be cleaned and re-varnished immediately to prevent short circuits.

Frequently Asked Questions (FAQ)

Q: Can this Continuous Annealing Machine for Metal Tubes handle different tube shapes?

A: Yes. While the main machine remains the same, we customize the induction copper coil to match your specific tube shape (round, square, rectangular, or oval). Changing the coil allows the machine to process different shapes efficiently.

Q: What is the expected lifespan of the induction coil?

A: With proper daily cleaning and maintenance, a high-purity copper induction coil can last for several years. It is considered a consumable part, and we provide rapid, low-cost replacement coils directly from our factory.

Q: Can industrial customers evaluate the equipment at the factory?

A: Yes, Feihong warmly invites industrial customers to visit our Zhaoqing, Guangdong factory to inspect our newest, best-selling, high-quality industrial equipment in production conditions. You can tour our six specialized workshops, observe the annealing machine in actual operation, and discuss your specific industrial production requirements directly with our engineering team to ensure the right solution for your facility.

Get Your Continuous Annealing Solution Today

Upgrade your metal tube processing capabilities with Feihong's reliable Continuous Annealing Machine for Metal Tubes. Contact our engineering team today to discuss your tube specifications, production speed requirements, and to get a factory-direct quote.