Induction Heating Automation - Agni Induction Technologies

Scanners for scan hardening

Automated induction heating scanners are crucial for precise, repeatable surface hardening of metal parts like shafts and gears. These systems leverage CNC or PLC controls to move the part relative to the induction coil, ensuring specific heating profiles and consistent quality.

An induction scanner works by progressively heating and quenching a part along its length. The process is highly controlled:

Part Presentation: The metal workpiece (e.g., a shaft) is held vertically or horizontally, typically between centers, and rotated at a controlled speed.
Scanning (Movement): The part moves past a stationary induction coil and quench ring, or vice versa, at a precise, user-defined feed rate. This creates the “scan.”
Heating & Quenching: The induction coil rapidly heats a narrow band of the surface via eddy currents and hysteresis losses. Immediately following the coil is a quench ring that sprays the heated area with a specific cooling medium (water, polymer solution, or oil) to rapidly form a hard martensitic structure on the surface while leaving the core tough.
Automated Control: The entire process is managed by a PLC or CNC system that monitors and adjusts power levels, frequency, scan speed, rotation speed, and quench flow in real-time, ensuring consistency.

Conveyers for Scan Hardening

n high-volume production, conveyorized induction scan hardening is the ultimate solution for “continuous flow” manufacturing. While traditional vertical scanners are great for long shafts, conveyor systems are the workhorses for smaller, high-speed parts like valves, pins, bolts, and automotive fasteners.

The system integrates a conveyor belt (often stainless steel or specialized chain) with a series of induction stations and quench zones:

Automated Loading: Parts are fed from a vibratory bowl or hopper onto a moving conveyor.
Guided Scanning: The conveyor moves parts at a constant velocity through one or more channel-style induction coils.
Rotation (Optional): For cylindrical parts, the conveyor may include a “spin” mechanism to ensure the surface is heated with perfect 360° uniformity.
Integrated Quenching: As parts exit the induction tunnel, they pass through a quench spray curtain or drop into a quench tank for immediate hardening.

induction Hardening machine with vertical scanner

Industries Tables for Hardening/Brazing

Industry	Hardening Applications (Wear Resistance)	Brazing Applications (Joint Integrity)
Automotive	Camshafts, gears, axle shafts, and CV joints.	Fuel rails, AC tubes, and hydraulic fittings.
Aerospace	Turbine blade roots and landing gear pins.	Honeycomb structural panels and fuel line assemblies.
Tooling & Mining	Drill bits, saw teeth, and hammer heads.	Carbide tip brazing on cutting tools and mining bits.
Energy / Oil & Gas	Pump shafts and valve seats for high-friction zones.	Drill pipe connectors and heat exchanger tubes.
Medical	Surgical instruments and orthopedic implants.	Precision brazing of stainless steel catheters and dental tools.
HVAC & Plumbing	High-wear compressor components.	Copper-to-copper joints in coils and manifolds.

Process Comparison

Feature	Induction Hardening	Induction Brazing
Primary Goal	Change material structure (Martensite).	Join two materials using a filler metal.
Temperature	Typically 800°C – 950°C (Material dependent).	Depends on filler (600°C – 1100°C).
Post-Process	Immediate Quenching (Water/Polymer).	Natural or controlled cooling.
Key Variable	Case depth and surface hardness.	Joint capillary action and leak-proof seal.

Job Auto Loading for Biller Heaters

Automated Billet Loading Systems: Powering Continuous Induction Forging.
Eliminate manual handling risks and maximize press uptime. Our Auto-Loading Solutions provide a seamless, synchronized feed for induction billet heaters, ensuring every workpiece enters the coil at the perfect cadence.

- Step-Feeder & Vibratory Bowl Integration:
  Designed for heavy-duty automotive billets, our Step-Feeder Systems automatically orient and elevate bulk-loaded parts into a single-file stream, ready for the induction coil.
- Precision Pusher & Tractor Feed Mechanisms:
  Control the “dwell time” inside the induction field with precision. Our servo-driven pushers ensure consistent Billet Heating Uniformity, preventing “cold spots” that can damage forging dies.
- Pneumatic/Robotic Pick-and-Place:
  For delicate or complex-shaped billets, integrated Robotic Loaders use vision systems to identify, grip, and place parts onto the heater track with sub-millimeter accuracy.
- Automatic “Reject” Gates:
  Integrated with Temperature Monitoring Systems, our auto-loaders feature high-speed sorting gates that automatically eject under-heated or over-heated billets before they reach the press.

Induction Heating Temperature Monitoring System

induction heating temperature monitoring system uses non-contact infrared pyrometers or fiber optic sensors to provide real-time thermal data, which is crucial for achieving consistent quality, automating processes, and preventing damage to components in the automotive industry.

A sensor alone is insufficient; it must be integrated into a closed-loop control system:

Sensor: The “eyes” that continuously measure the workpiece temperature.
PID Controller: The “brain” that compares the actual temperature to the desired setpoint and calculates the required power adjustment.
Induction Power Supply: The “hands” (actuator) that adjusts the power output based on the controller’s command.

Quality Control: Ensures precise heating for consistent metallurgical results, such as the correct hardness in crankshafts or gears, which is vital for product quality and safety.

Automation: Enables “set-and-forget” production lines, providing real-time data to PLCs/SCADA systems for full automation and traceability of every part.

Efficiency: Prevents overheating (which causes material damage) and optimizes energy input, leading to minimal scrap and lower operational costs.