Force effects: In the cutting process, the blade subject to axial force
and tangential force. Because there is in the circumferential direction
and the radial force, in the axial direction so wet granite pads that the blade wavy dish
in radial direction. Both can cause deformation of the rock section is
not flat, stone wasted, sawing noise, vibration intensified, resulting
in diamond caking early damage, reduced blade life.
Temperature effect: the traditional theory: the influence of temperature
on the blade process is mainly manifested in two aspects: First, cause
agglomeration of diamond graphitization; two diamond and matrix is
caused by thermal stress caused by premature loss of diamond particles.
New research showed that: the heat generated during cutting the main
incoming agglomeration. Arc temperature is not high, generally between
40 ~ 120 ℃. The abrasive grinding point temperature was high, generally
between 250 ~ 700 ℃. The coolant only reduce the average temperature of
the arc zone, the temperature has little effect on the grain. This does
not result in graphite carbonization temperature, but will make the
friction between the abrasive particles and the workpiece change in
properties, and to occur between 12 inch saw blade the diamond and the additive thermal
stress, which led to fundamental changes in the failure mechanism of
diamond. Studies have shown that the temperature effect is to make the
biggest factors blade breakage.
Grinding damage: the force effects and temperature than the response,
after a period of use of the blade tend to produce wear damage. Grinding
damage in the form of mainly the following: abrasive wear, local
crushing, a large area of broken off, binders direction along the
cutting speed of the mechanical abrasions. Abrasive: Diamond particles
and constant friction formula pieces, into a flat edge passivation, loss
cutting, increasing friction. Heat causes the cutting surface of the
diamond particles graphite sheet, the hardness greatly reduced,
increased wear: the surface of the diamond particles exposed to
alternating thermal stresses, and also diamond tool manufacturer the cutting under alternating
stress, fatigue cracks will be partially broken, revealing a sharp new
edge, is an ideal wear pattern; large area broken: diamond particles in
the Leads to withstand shock loads, the more prominent grain and grain
prematurely consumed; shedding: the diamond cutting force alternating
binding agent particles are constantly being generated shaking loose.
Meanwhile, the cutting process of the binding agent itself wear and
cutting heat to soften the binding agent. This makes the gripping force
decreased binding agent, when the particle is greater than the cutting
force on the gripping force, the diamond particles will fall off. No
matter what kind of wear and tear with the diamond particles to
withstand load and temperature are closely related. Both of which are
determined by sawing process and cooling lubrication conditions.
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