Study on the dynamic stability of circular saw blade during medium density fiberboard sawing process with thermo-mechanical coupling

The dynamic stability of the circular saw blade determines whether the sawing process can smoothly proceed. The sawing heat significantly affects the dynamic stability of the circular saw blade. This study proposes a sawing heat simulation method which allows to analyze the temperature, stress, and natural frequency of a blade sawing medium density fiberboard (MDF). The edge temperature of the saw blade in high-speed cutting is higher than that in low-speed cutting, which leads to the formation of a large temperature gradient and reduces the natural frequency of the saw blade. However, the centrifugal stress more significantly increases the natural frequency during high-speed cutting, the saw blade still has better dynamic stability than during low-speed cutting. The simulated saw blade temperature field and static natural frequency are consistent with the experimental results, which validates the proposed method. The proposed model allows to predict the saw blade temperature distributions and to effectively set the sawing parameters.