Which type of flame assessment should be monitored during oxyfuel cutting to ensure optimal performance?

Monitoring the size and shape of the flame inner cone during oxyfuel cutting is crucial for optimal performance. The inner cone represents the area where the highest temperature occurs and is essential for achieving the proper cutting action. A well-defined inner cone indicates a balanced mixture of oxygen and acetylene, ensuring that the flame is not too rich or too lean. This balance is critical for efficient cutting, as it influences the cutting speed, quality, and the kerf of the cut metal.

When the inner cone is of the appropriate size and shape, it helps maintain a concentrated heat at the cutting point. If the cone is too large or irregular, it may lead to poor cutting performance and increase the likelihood of defects, such as excessive slag or rough edges.

While other factors, such as the color of the flame or the pressure of the oxygen cylinder, can provide some insights into flame conditions, the inner cone's characteristics directly affect the cutting effectiveness and should be the primary focus during cutting operations. Thus, paying attention to the inner cone is essential for achieving the best results in oxyfuel cutting.