Electric circular saw blade knowledge-3
Post Time: 2016-08-17
4.OthersSubstrate thickness with tooth thickness should maintain a certain relationship, generally tooth thickness should be larger than the substrate thickness of about 0.8-1mm. Guarantee not to rub the base when the saw blade to use. The matrix itself posterior horn, usually large angle than the rear tip of about 2 °, mainly in order to ensure the blade to maintain a certain amount of feed at the time of use, not because of human factors, leading to excessive feeding, which leads to chipping or tools stall burn. Shaped charges DeWalt DC saw blade, as shown, the main role is to ensure a certain amount of feed, at the same time play the role of Chip. Cutter runout, so ensure continuous balance cutting a more important factor, currently requires runout less than 0.1mm. Saw static balance must also be controlled, static balance is too large, will lead the blade to vibrate at high speed cutting process, this index saw a slight change in accordance with the specifications. 5.Elastic ModulusFor the same material, in different conditions of hardness, modulus of elasticity vary, generally the elastic modulus increases with the hardness, with the amount of deformation of the elastic modulus increases. When the matrix hardness, the amount of deformation becomes small. The blade during the cutting process should maintain a certain amount of deformation, deformation excessive kerf becomes large, resulting in wasted effort increases, the deformation is too small, will cause friction at the same time a plurality of jagged wood, increasing the friction force. There is a balance between the power output of the tool for sawing wood for power = + friction as wasted effort; we want to make friction wasted effort as possible. Therefore, the amount of deformation must ensure that within an appropriate range, both to ensure the kerf width, and reduced friction. That should ensure a certain matrix hardness, currently used as a matrix hardness HRC35-40, mainly to ensure the elastic modulus to ensure deformation. Due to the presence of the main angle, so that the cutting force of the blade to produce vertical force component, so that working head is deformed, the other did not work does not rub the tip of the workpiece (timber)
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