Introduction to Temperature Measurement in Aluminum Hot Rolling
Aluminum Hot Rolling processes require precise temperature measurement, and non-contact infrared sensors are ideal for this. These sensors accurately capture temperature readings while addressing challenges like low and variable emissivity in aluminum. By measuring temperatures in real-time without direct contact, they enable better control of the rolling, heating, and cooling stages, optimizing both product quality and energy efficiency.
Key Stages of Aluminum Hot Rolling
Slab Temperature Measurement
As the temperature of the slab cannot be directly measured inside the furnace this measurement is the first real temperature measurement. The slab measurement can be used to adjust the furnace temperature for the next slab but, more importantly, it can be used to set the process parameters in the first rolling operation.
Strip Temperature Measurement
The actual temperature of the strip can be measured at all stages(thickness) and can be used to adjust the rolling speed and cooling intensity according to process requirements.
Coiling Temperature Measurement
Allows the absolute temperature value and the temperature distribution along the strip to be recorded. This recorded temperature can be used to both modify the previous stage for the next Slab and, most importantly, to adjust the coiling speed and cooling and thus to obtain the correct conditions for the metallurgical properties. These metallurgical properties can be achieved either by expensive special aging processes in a furnace or by adjusting the coiling speed and cooling rate to produce the correct structure followed by natural aging.
Why Non-contact Temperature Measurement is Crucial
With continuous metal movement in the aluminum hot rolling process, using non-contact methods like infrared sensors is vital for maintaining operational efficiency. These sensors provide real-time temperature data without interrupting the process, helping to avoid delays caused by manual temperature checks. By eliminating contact-based measurements, they also reduce the risk of contamination or damage, allowing for smoother production cycles and improving overall system reliability. This enables manufacturers to optimize throughput and maintain high-quality standards throughout the rolling process.
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