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首页> 外文会议>Proceedings of Third International Symposium on Wood Machining >DETERMINATION OF THE CUTTING POWER OF THE SAWINGPROCESS USING BOTH PRELIMINARY SAWING DATA AND MODERN FRACTURE MECHANICS
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DETERMINATION OF THE CUTTING POWER OF THE SAWINGPROCESS USING BOTH PRELIMINARY SAWING DATA AND MODERN FRACTURE MECHANICS

机译：利用初步锯齿数据和现代断裂力学确定锯齿过程的切削力。

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摘要

The cutting power model obtained during investigation of narrow-kerf sawing process of pine carried out on the modern sash gang saw was a database of a mathematical model formulation of cutting power per one saw. The obtained linear model was formulated for constant values of the kerf (width of cut) S_t = 2 mm and saw blade thickness s = 0.9 mm. According to modern fracture mechanics it is possible to evaluate the specific work of surface formation (fracture toughness) form the intercept of the model. Furthermore, from the second model coefficient, in the range of larger values of feed per tooth, the other cutting process characteristic data such as: the shear yield stress, the shear strain along the shear plane, the friction correction and the orientation of the plane were calculated. Basing on those determined parameters the theoretical models of the cutting power for narrower saws were worked out. Eventually, they were compared to data obtained directly form the cutting experiments. Obtained relative errors for the narrowest saws (S_t = 1.25 mm) have the largest values but they do not exceed of 15.5%. The presented methodology may be suitable for determination of the cutting power for saws which kerf differs from saws used in the preliminary cutting tests.
机译：在现代窗扇组合锯上进行的松木窄缝锯切过程研究过程中获得的切削力模型是一个数据库，其中包含了每把锯的切削力的数学模型公式。将获得的线性模型公式化为切口（切割宽度）S_t = 2 mm和锯片厚度s = 0.9 mm的恒定值。根据现代断裂力学，可以评估模型截距形成表面的特定功（断裂韧性）。此外，根据第二模型系数，在每个齿的进给量较大的范围内，其他切削过程特性数据例如：剪切屈服应力，沿剪切平面的剪切应变，摩擦校正和平面的方向被计算。基于这些确定的参数，建立了窄锯切割能力的理论模型。最终，将它们与直接从切割实验获得的数据进行了比较。对于最窄的锯（S_t = 1.25 mm）获得的相对误差具有最大值，但不超过15.5％。所提出的方法可能适合于确定锯口的切割能力，该切口的切口不同于在初步切割测试中使用的锯。

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