切削剤の切屑冷却効果 (第2報)

-切削剤の冷却効果に関する研究 (4)-

抄録

In metal cutting, the cooling effect of coolant from chip side on the tool-chip interface temperature is analysed by a difference method, under the assumption that -the heat transferred by conduction in the direction of motion of chip may be neglected. The tem- perature rise θ at any point on the tool-chip contact plane (heat source) is given by the following expressions :
θ = θ_de^-An, where, A= 0.0044 (θ_s/φt₂) 0.5 (ht₂) 0.57, n=100 am/V_ft²₂= (25/L) (m/t) ₂
The suffix a' is for dry cutting (h=0), and analysis showed that θ_d is equal to the Jeager's solution solved for a semi-infinite body, when V_f and t₂ are not very small.In the above, symbols are as follows : h : the value depended upon a cooling power of fluid α /K, α : heat transfer coefficient, K : thermal conductivity of chip materials, a : thermal diffusivity of chip, t₂ : thickness of chip, V_f : chip velocity, m : contact length of tool and chip, L : peclet number V_fm/4a.