High-performance ultra-large annealing furnace

The latest system manages the temperature. Please compare the temperature chart with the currently used annealing chart.

Removal of Residual Stress Necessary for High-Precision Machinery In complex castings such as machine tools and industrial machinery that require high precision, it is essential to eliminate residual stress caused by time differences in shrinkage due to variations in wall thickness and resistance from the mold. Additionally, welded structures such as fabricated products also require stress relief. Although it may seem that annealing is unnecessary since the appearance of the product does not change, over the years, differences will arise due to residual stress. To maintain high precision, annealing is necessary to suppress changes over time. The most important process for removing residual stress is the slow cooling process. In conventional general annealing furnaces, the heating and cooling are done simply, resulting in a slow cooling chart that bows like the yellow line, as it cannot cool uniformly at a constant temperature. Similar to in-box slow cooling, uneven cooling can leave residual stress. Our high-performance annealing furnace achieves uniform temperature within the furnace by repeatedly burning, cooling with air, and extinguishing for each of the 14 burners through an ON/OFF cycle combustion control system, resulting in a chart that is close to linear. By slow cooling at a stable temperature, we can reduce residual stress to nearly zero and provide optimal castings and fabricated products for customers pursuing high-precision machinery.

Flat/Shaped/Vertical Cutting MachineGrinding MachineSteel