circular saw blade dynamic

Dynamic operation stability of the circular saw blade is a blade in the cutting processing, maintaining its inherent shape and stiffness properties. Job stability than the saw blade and the   frame band saws poor, mainly because of large blade diameter to thickness ratio, and only the clamping disc holding the spindle rotates at high speed can not be tensioned. Part of the body alone saw serrated metal binding force, it maintains a certain rigidity. When the blade rotates at high speed, the centrifugal force, the grinding wheels  saw tooth edge portion of the body begins to relax, in addition, timber sawing, the saw tooth edge portion of the body temperature rise sharply, volume expansion, and the blade but also by material constraints can not be arbitrarily scalable, large internal deformation occurring outside the small, on both sides of the blade to swim, was "hunting" state, causing rough sawn wood surface waves.
First, the centrifugal force
Rotating blade, the saw body parts of the material are subject to the centrifugal force.
Second, the impact of cutting heat and displacement caused by temperature gradients
Saw cutting work, saw tooth edge portion of the  industrial saw blades body temperature is higher than the temperature of the rest of the blade on the outside there is a high internal temperature low, according to Mote, Szymani other scientists' research results, for the 1mm thick blade, When the blade in the radial direction of the temperature difference reaches 9 ℃, the blade wavy deformation occurs. Also exacerbated instability in the blade work.
Third, the circular saw cutting runout and lateral vibration on Processing Quality
Cutting circular saw blades, due to the number of teeth and more, chip thickness of only hundredths of a millimeter. So rather small radial deviation will be on chip thickness have a great impact, in addition to radial runout effects, the lateral vibration of the processing quality, especially surface roughness has a great influence.
Four, vibration analysis
Vibration of the saw blade is in its equilibrium position the blade reciprocating lateral movement. Vibration caused by external interference, and always behave as some kind of "class." Vibration of the blade during cutting can not be compensated, the vibration will increase sawing path loss, reduced cutting accuracy, increase the noise level and shorten tool life.
Fifth, the concept of stability
Saw work there is always a certain vibration, but not necessarily instability. The critical instability conditions, even if a frequency is zero or very small lateral forces can cause very large lateral displacement of the blade. Instability saw blade vibration theory is the stone polishing pads  study of the most important fields.
Six, critical speed theory
Theoretical critical speed is determined by Lapin and Dugdale introduced into the study of circular saw blades, before this theory is mainly used in the design of turbine research.
Seven, plane stress
The initial blade manufacturing residual stress include stress, suitable for tensile stress. Rotary cutting blade, will turn with stress, thermal stress and the stress caused by cutting force. All of these stresses can be considered as plane stress.
1, suitable for tensile stress
2, the rotary stress
3, thermal stress
4, the cutting stress
Eight, to improve the dynamic stability of a blade
1, suitable for sheets
2, saw themselves slotted
3, the guide
4, the thermal stress control