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

Experimental Study on the Dynamic Stability of Circular Saw Blades during the Processing of Bamboo-Based Fiber Composite Panels

“…Figure 6a shows the initial temperature of the circular saw blade; Figure 6b shows the temperature distribution of the circular saw blade with isotherms at time t = 1.525 s; Figure 6c shows the temperature distribution of the circular saw blade with isotherms at time t = 3.25 s; and Figure 6d shows the temperature distribution of the circular saw blade with isotherms at time t = 4.17 s. The maximum temperature in the sawtooth region in Figure 6 is 56 °C . From Figure 6b-d, concerning the temperature change of the circular saw blade, it can be concluded that the temperature of the saw teeth after the collision between the circular saw blade and the BFCP rises rapidly, and at the same time, it is transmitted to the muffling groove and other regions of the circular saw blade, which is consistent with the rule of change investigated in the literature [20], and it also demonstrates the accuracy and reliability of the thermo-solid coupling model in this paper. In the isotherm plots of Figure 6c,d, the temperature on the circular saw blade is conducted from the teeth of the saw to the axis of the saw body, and the isotherm lines become sparse from dense, which indicates that the temperature difference gradually decreases, and the results of the study are the same as those present in the literature [31].…”

“…Frictional heat is generated by the friction between the saw teeth and the new surface, and this process occurs in the second heat source region. The friction between the circular saw blade and the chips generates heat, while 60% of the heat is converted into thermal energy, and this process occurs in the third heat source zone [20]. The above heat source zones are generated when the BFCP deforms and fails and cannot be represented by keywords in the pre-treatment.…”

“…Referring to some studies on sawing wood, it is not difficult to find that BFCP generates heat when sawing, and a large amount of heat will be transferred to the tool [18]. The circular saw blade will produce certain thermal deformation, which will affect the machining accuracy and even carbonize the material [19]; at the same time, the thermal deformation will affect the dynamic stability of the circular saw blade [20], so the heat will have a great impact on the machining performance of the circular saw blade.…”