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Obtaining the perfect mirror finish grind and extending super abrasive wheel life, comes down to one crucial component: proper mounting. The bane of precision grinding, vibration causes harm to the surface finish, wheel life and can ultimately cause marring of the workpiece and spindle long-term. In Zhengzhou Ruizuan, as diamond and CBN wheels manufacturer, we have accumulated vast experience in processing high demand wheels so we know exactly the right way of fitting them to your machine. We are taking you through all the necessary steps to ensure your wheel is mounted correctly for an even, ‘vibration’ free operation.
Get To Know Why Fit Is So Important
The accurate fit of wheel and the machine flanges is the base for a vibration free mounting. Diamond and CBN wheels are extremely strong and do not absorb imbalance, therefore experience no vibration or wobble of the wheel and normally can be operated on a machine without any tailstock or other support. Tolerance on hole of the wheel and uneven pressures between wheels and flanges will create vibration across the spindle cut. It is desirable to have a reception of the type in which the assembly can be perfectly centered and uniformly clamped. Before even touching the machine, make sure to check all machine flanges for any wear, corrosion or dirt. A particle, even a grain of sand, under the flange when the wheel is re-assembled to it, can upset everything. That the flanges are clean, flat and of a proper diameter, generally not less than one-third that of the wheel, for sufficient backing.
Performing a Thorough Pre-Installation Check
Proper mounting starts before the wheel is put on the machine. On metal grinding wheels, examine the cancel and listen to it ring also tap on it a number of places with a non-metal tool, like the cast handle of a screwdriver or end of an adjustable wrench. Then check the mounting holes of the wheel, as well as any machine spindles on which the wheel fits, for possible chips or burrs. To prevent this initial unbalance, surfaces should be perfectly flat. Thoroughly rub the hole in the wheel and machine spacer with a lint free cloth. Any remaining dust or film could cause a slight but noticeable displacement. If you put the wheel on the shaft and have to push it really hard, you will have a problem! Don't force it by hammering on in case its too tight or binding as you can damage both the wheel and spindle. Re-examine and clean the surfaces.
Wheel Assembly Balance for Best Performance
The proper mounting may not sufficient for the perfect wheel - a new diamond or CBN wheel must be balanced to have the optimal smoothness. This is an essential process for high-precision application. The wheel with the flanges and bushing (if used) create a rotating assembly that is to be balanced as one. For convenience we suggest using a balancing stand for this. The procedure is to install the complete unit on our balancing stand and locate a heavy spot. The wheel will want to spin under it's own weight until the heavy point is at the bottom. You can balance that imbalance by tuning the balancing weights. The point is to make the assembly stay put no matter where you leave it. Balancing the wheel after install will drastically reduce vibration and provide a better finish on the work piece and extend your super abrasive life.
Final Tightening and Run-In Procedures
When the wheel is centered, it is time to go back to the grinder and mount the wheel. Tighten the mounting nut with the appropriate wrench, ensuring not to over tighten and distort the flanges or crack the wheel core. It is always advised to consult the machine manufacturer' s recommended torque values.