Electric circular saw blade knowledge-1
Post Time: 2016-08-17
1.The hardness of the blade material and heat treatmentUsually the matrix material 65Mn steel, heat treatment hardness 38-42HRC, since the head of domestic quality, the quality of welding and heat treatment affect the quality, the general control 35-40HRC.
Segment YG8 general use, the blade is typically used YG8A abroad and YG8X, YG8A carbide for high-quality, superior performance YG8, YG8X with respect YG8 organization finer grain, red hot toughness, durable, long life, in the process of cutting friction heat has little effect, but the disadvantage of higher costs, the average tooth about twice as expensive. Segment hardness greater than HRA90. 2.Grinding head angleThere are four main angle is more important:
Rake angle:
According to foreign and sample blade, saw blade angle saw timber before the general control of 15-20 °. Principles approached the greater the angle the more sharp, but the shorter the tool life, easy to chipping; due to different cutting material, rake angle is also quite different, cutting harder the material, the greater the relative cutting resistance should be small rake angle, even negative rake angle.
Also saw blade rake angle of 25 ° to the saw blade, the saw blade on the use of DeWalt DC rake angle 22 °, the main analysis because DC power is small, the output torque, so the use of a large rake angle, the tool sharp reduction small cutting resistance.
After the horn:
According to foreign and sample blade, saw blade angle saw timber generally controlled 12-15 °, after the angle is too small, the tip increase friction with the timber, the impact of the use of the saw blade; rear angle should not be too large, too much strength tool reduce, reduce service life.
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