I. Equipment Overview & Functional Description

This Electric Bogie Hearth Heat Treatment Furnace (Model: RT2-220-9) is an industrial batch-type furnace designed for annealing, normalizing, and quenching heat treatment processes of metal and alloy components under $1100^circtext{C}$ in ambient air. The equipment provides an effective internal working space of $2500 times 1300 times 900text{ mm}$ ($text{L} times text{W} times text{H}$), a rated heating power of 220 kW, and a maximum loading capacity of approximately 2 Tons.

The heavy-duty shell frame is welded from $3text{ mm}$ steel plates and 10–14# steel columns to form a rigid grid structure, coated with anti-corrosion and high-temperature resistant paint. The furnace lining features a full ceramic fiber folded block structure (Shandong Luyang 1260 high-purity ceramic fiber, density $ge 230,text{kg/m}^3$, total lining thickness $325text{ mm}$), offering minimal thermal conductivity, excellent resistance to thermal shock, and high durability. The bogie movement is driven by a $1.2text{ kW}$ cycloidal pinwheel reducer paired with ZG55# cast steel wheels and heavy-duty bearings for smooth traversal. The furnace door mechanism utilizes a 1-Ton electric hoist for vertical movement and secures a tight seal through a self-weight clamping mechanism, eliminating the need for counterweights or floor pits. The entire process automation is managed via a smart HMI panel, ensuring complete operation safety and efficiency for heavy workloads.

II. Technical Specifications & Integrated Component Configuration

1. Thermal & Electrical Specifications

• Rated Power & Power Regulation: 220 kW rated heating power, driven by a Jiangsu Danxiang SCR Power Regulator providing 1%–100% stepless, high-precision adjustment for optimized energy management.

• Operating Supply: 3-Phase $380text{V} / 50text{Hz}$ industrial power supply.

• Temperature Capabilities: Maximum design temperature of $950^circtext{C}$ with a continuous normal working temperature of $850^circtext{C}$. Fast thermal response enables an empty furnace heating time of $< 1text{ hour}$.

• Control Accuracy & Uniformity: Divided into 2 independent temperature control zones, delivering a strict temperature control accuracy of $pm 1^circtext{C}$ and a thermal uniformity within $pm 10^circtext{C}$ inside the effective workspace.

2. Materials & Heavy-Duty Hardware Integration

• High-Performance Heating Elements: Engineered with premium Beijing Shougang high-resistance 0Cr25Al5 alloy strips in a corrugated layout, anchored firmly on side walls and the bogie surface via specialized ceramic anchor bolts.

• Full-Fiber Energy-Saving Lining: Built with high-purity Shandong Luyang 1260 ceramic fiber modules (density $ge 230,text{kg/m}^3$, total lining thickness $325text{ mm}$) and Henan Baiwei high-grade refractories, keeping the outer side-wall temperature rise under $< 40^circtext{C}$.

• Heat-Resistant Hearth Plates: The bogie is armored with 30 mm thick CrMnN heat-resistant steel plates to withstand heavy impact and prevent damage to bottom heating coils.

• Smooth Bogie Drive System: Driven by a Changzhou Weiyikang 1.2 kW cycloidal pinwheel reducer coupled with ZG55# cast steel wheels and heavy-duty bearings for reliable traversal.

3. Smart Controls & Electrical Hardware

• HMI & Temperature Controller: Features a Shimaden (Japan) SRS3 high-precision programmable controller paired with an MCGS 10.1-inch color HMI touchscreen for real-time trend visualization, formula storage, and diagnostics.

• Low-Voltage Electricals: Assembled with reliable Delixi low-voltage electrical switchgears and safety breakers to guarantee complete interlock protection.

III. Electrical Control & Smart Logic Interlocking

1. Temperature Control System: Integrated with Japanese Shimaden SRS3 intelligent programmable controllers and SCR power regulators utilizing time-proportional module firing with smooth manual/automatic transfer.

2. Human-Machine Interface (HMI): Equipped with a 10.1-inch color touchscreen capable of real-time & historical trend logging, recipe storage/loading, USB data export, screen capturing, and over-temperature alarm logic.

3. Safety Interlocking Network:

   • Bogie motion is disabled during active heating cycles;

   • Heating can only activate when the furnace door is fully closed;

   • The bogie can only travel in/out when the door reaches its upper limit position;

   • Travel limits for both the hoist and bogie are guarded by position limit switches.

IV. On-Site Production Operational Process Flow

1. System Initialization: Power on the main control cabinet, inspect utility connections and interlock statuses, and load the heat treatment process curve on the HMI.

2. Workpiece Loading: Use an overhead crane to securely place the workpieces onto the CrMnN heat-resistant hearth plates on the bogie within the effective dimensions.

3. Bogie Infeed & Sealing: Drive the bogie smoothly into the furnace cavity, lower the door via the electric hoist, and lock the self-weight clamping mechanism for a tight seal.

4. Thermal Processing: Start the heating program after sealing is confirmed. The system automatically regulates the thermal curve and holds temperature across zones.

5. Cooling & Extraction: After the cycle completes, cool down as specified. Raise the furnace door once safe, drive the bogie outward, and lift off the workpieces for the next batch.