Ø245mm Aluminum Billet | 300kW Fully Digital IGBT Induction Heating Production Line | Aluminum Alloy Pre-Forging Heating & Precision Temperature Control System

1. Product Overview

This production line is a fully digital IGBT induction heating complete set, specifically designed for rapid pre-forging heating of A6061, 5083-H111 aluminum alloy billets. Featuring 300kW/0.15kHz fully digital IGBT power supply, equipped with Ø245mm dedicated inductor (GTR-275×2000), heating temperature 460-495℃, production cycle 246 seconds/piece (approximately 1000kg/h). The line covers storage platform, turning mechanism, cylinder feeding, rapid discharge, three-way sorting mechanism, and infrared temperature measurement system – achieving full automation from loading to sorting. Typical applications include aluminum alloy forging and pre-extrusion heating production lines.

2. Industry Challenges & Root Cause Analysis

Insufficient heating temperature uniformity:Large cross-sectional temperature differential in aluminum billets causes uneven deformation and inconsistent microstructure during forging. Root cause: inductor design not optimized for aluminum characteristics, irrational gap between coil and billet.

Low heating efficiency and high energy consumption:Traditional thyristor power supplies have low efficiency and insufficient power factor – high unit energy consumption. Root cause: outdated power supply technology, lack of automatic frequency tracking and power regulation capability.

Low sorting accuracy causing high reject rate:Billets with unqualified temperature after heating are not removed in time – causing batch rejects in forging. Root cause: lack of high-precision online temperature measurement and rapid sorting mechanism.

Poor equipment stability and difficult maintenance:Complex thyristor assembly structure – repair requires professional alignment – long downtime. Root cause: outdated traditional tripod thyristor assembly method.

High failure rate of water cooling system:Irrational cooling water layout – pipeline cross-contamination and abnormal water temperature cause equipment downtime. Root cause: lack of zone management and temperature monitoring in water circuit design.

3. Solution

3.1 Fully Digital IGBT Induction Heating Power Supply:Rated power 300kW – nominal frequency 0.15kHz – input voltage 380V – output voltage 1000V. Automatic voltage regulation control – complete protection functions including phase loss, overcurrent, overvoltage, grounding, fast fuse, frequency abnormality, cooling water abnormality. Power infinitely adjustable from 0 to full power – can be controlled by external signal (such as PLC) for fully automatic operation – can also automatically adjust power output via temperature sensor and temperature-controlled speed adjustment module.

3.2 Standardized Inductor & Long-Life Coil:Inductor with standardized design as easily replaceable unit – cooling water pipes with quick-connect couplings – all valves stainless steel. Inductor and capacitor bank busbar with quick connection – firm and reliable. Induction coil made of Luoyang Copper T2 oxygen-free cold-drawn copper tube – wall thickness ≥2.0mm – after winding undergoes acid washing, high-temperature varnish insulation, resistance furnace baking – withstand voltage to ground ≥5000V – coil life ≥8000h. Furnace lining made of austenitic stainless steel tubing.

3.3 Automatic Frequency Tracking & Startup Protection:Medium frequency power supply adopts automatic frequency tracking control – automatically tracks load frequency regardless of variation – no manual adjustment required. Startup adopts frequency sweep method – sends a set of frequencies covering load frequency variation range to start equipment – unaffected by load changes – greatly improving startup reliability.

3.4 Modular Thyristor Assembly & Fault Self-Diagnosis:Latest modular thyristor assembly – more aesthetically pleasing, better performance, easier repair (ordinary electrician can repair and replace) compared to traditional tripod assembly. Fault display and self-diagnosis system displays fault cause and main fault point locations (such as rectifier and inverter pulse status) – helping maintenance personnel quickly locate faults.

3.5 Three-Way Sorting Mechanism & Infrared Temperature Measurement:Dedicated aluminum alloy temperature measuring instrument installed at outlet – infrared temperature measurement – temperature display and storage function (180-day storage) – upper and lower limit alarm devices. Three-way sorting mechanism quickly, accurately, and promptly separates low-temperature and high-temperature materials – conveyed to respective bins via chutes – sorting rate 100%. Initial forging temperature controlled between 480-495℃ (adjustable per customer process) – forgings below or above forging temperature sorted into different bins.

3.6 Intelligent Control System:15-inch color touchscreen (TPC1571) – can input cycle time (direct time input) and material length – automatically records low-temperature, qualified, and high-temperature material quantities. Can query and print verified stored product parameters (capable of loading and reading more than 50 process parameters). Operation divided into "automatic" and "manual" modes. Intelligent fault identification function displays fault content and corresponding solutions – operators can quickly handle more than 90% of common faults.

4. Technical Specifications

5. Selection Guide

5.1 Recommended Scenarios

• Aluminum alloy pre-forging rapid heating (A6061, 5083-H111, etc.)

• Aluminum alloy pre-extrusion heating

• High-volume production lines requiring high-precision temperature sorting (100% sorting rate)

5.2 Key Selection Considerations

1. Billet specifications: Verify diameter Ø245mm, length 5500mm, single piece weight 68.406kg match

2. Capacity requirements: Production cycle 246 seconds/piece (approx. 1000kg/h) – calculate against daily output

3. Heating temperature: 460-495℃±15℃ – confirm forging process temperature within range

4. Cooling water conditions: Need 45m³/h cooling water, inlet 5-35℃, pressure 0.2-0.3MPa

5. Power supply: Need 3-phase 380V/300kW power capacity

6. Site conditions: Verify installation space for storage platform, turning mechanism, inductor, sorting mechanism

6. FAQ

Q1: How is uniform aluminum billet heating ensured?

A: Inductor with standardized design – coil-to-billet gap optimized for Ø245mm billets. With automatic frequency tracking control – automatically tracks frequency regardless of load variation – ensures uniform heating. Infrared thermometer at outlet monitors temperature in real-time with upper/lower limit alarms.

Q2: How are billets with unqualified temperature handled?

A: Three-way sorting mechanism quickly and accurately separates low-temperature and high-temperature materials – conveyed to respective bins via chutes – sorting rate 100%. Initial forging temperature controlled at 480-495℃ – forgings below or above this range sorted into different bins.

Q3: Can the equipment achieve fully automatic operation?

A: Power infinitely adjustable from 0 to full power – can be controlled by external signal (such as PLC) for fully automatic operation. Operation divided into "automatic" and "manual" modes – in automatic mode, only "start" and "stop" buttons needed to control entire machine.

Q4: Is thyristor assembly repair convenient?

A: Latest modular thyristor assembly – easier repair than traditional tripod assembly – ordinary electrician can repair and replace without professional alignment. Fault self-diagnosis system displays fault cause and main fault point locations.

Q5: What protection functions are included?

A: Phase loss (fast fuse) protection, overcurrent protection (automatically set to 1.5 times rated output current), overvoltage protection (automatically set to 1.15 times rated output voltage), low water pressure protection (8-second delay to prevent instantaneous fluctuation tripping), control power undervoltage protection, load characteristic protection, startup frequency tracking protection.