2013年10月21日星期一

The effect of diamond saw blades

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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