Circular saw cutting machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 18, 2001
Grant Date -
N/A
app pub date -
Jan 28, 2000
filing date -
May 30, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the operation of cutting a metallic work material, if the rotation of an electric motor 21 is reduced by a reduction gear mechanism including a gear mechanism and transmitted to a main shaft 23 and the metallic work material is cut by a circular saw 28 attached to one end of the main shaft, the moment of inertia I (kgf.multidot.m.multidot.sec.sup.2) of the main shaft is set to be more than F.times.(D/2)/[1000.times.250.times.(N/60).sup.2 ] while an outside diameter of said circular saw is D (mm), the number of revolution is N (rpm) and a cutting force per tooth as a component of force in tangential direction is F (kgf). By so setting, at the initial cut positions of the work material and in a region in which the number of cutting related teeth Zi is 1.0 or less at the final cut positions, the moment of inertia is high compared with a cutting torque applied to the main shaft by intermittent cutting resistance, so that the rotational variation of the main shaft is very small. Likewise, in a region in which Zi is high, reproduced chatter is suppressed. As a result, cut surface accuracy enhances and the service life of the saw prolongs.
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