Project Background and Core Process Requirements

WONDERY recently completed the delivery of a WDL260414 cart-type resistance heating furnace. Designed for quenching, annealing, and other heat treatments of metal parts under 1200 ℃, the project focused on balancing loading convenience for large workpieces with high thermal uniformity and energy efficiency.

Technical Solutions and Parameterized Evidence

1. Robust Hot Air Circulation and Uniform Thermal Field

To address potential temperature gradients in the 4-meter chamber:

• Circulation System: Equipped with 2 sets of high-temperature stirring fans at the top to force air circulation, ensuring uniform heat distribution throughout the loading area.

• Control Precision: Managed by a Japanese Shimaden SRS13A industrial PID controller and a 7-inch touchscreen, achieving a control accuracy of ±1 ℃ and supporting real-time process curve storage.

2. All-Fiber Energy-Saving Lining and Thermal Bridge Prevention

To minimize energy loss at ultra-high operating temperatures:

• Lining Construction: Utilizes Shandong Luyang aluminosilicate fiber blocks secured by a steel frame.

• Structural Advantage: Fibers are laid in layers and stacked alternately to eliminate "thermal bridge" short circuits. This lightweight structure offers low thermal conductivity and minimal thermal mass, significantly shortening ramp-up times.

• Shell Design: The furnace shell, reinforced with Q235-A steel plates and heavy channel steel, ensures the exterior wall temperature remains within safe limits even at 1200 ℃.

3. Mechanical Drive and Sealing Reliability

• Trolley Mechanism: The heavy-duty steel trolley frame is powered by a Changzhou Xiweide cycloidal reducer, ensuring smooth entry/exit and precise positioning.

• Sealing Technology: The concave-frame furnace door features layered fiber insulation and an automated pressing device to prevent heat leakage. The furnace bottom plate is cast from Cr25Ni20 (310S grade) heat-resistant steel to resist deformation and oxidation.

4. High-Temperature Element Mounting System

• Material Standards: Heating elements are made of 0Cr27Al7Mo2 high-performance alloy, offering superior temperature resistance and oxidation life compared to standard alloys.

• Installation: Secured by specialized high-alumina ceramic screws, elements are arranged on the side walls and trolley floor to provide surrounding radiant heat.

Delivery Specifications and Key Parameters

• Effective Working Dimensions: 4.0 × 1.05 × 0.85 m (L × W × H).

• Design Temperature: 1200 ℃.

• Automation: Supports timed data saving and printing (minimum 5-minute intervals), with integrated over-temperature alarms and mechanical interlock protections.

• Scope of Supply: Includes furnace body, loading trolley, control cabinet, heating elements, and complete technical documentation.