How to Examine The Quality of Polishing Wheels

How to examine the quality of polishing wheels? We all know that high quality polishing wheels need to be honed, so we need to strictly control each step.

Firstly, the selection of pressure and velocity

The selection of polishing material polishing wheel injection pressure should be determined according to different structural characteristics of alloy and casting. And the selection for the filling speed needs to consider some castings that have higher internal quality requirements or thick wall, and they should choose a lower filling speed and higher boost pressure; For thin wall or high surface quality of castings and complicated castings, they should choose higher filling speed.

Secondly, the pouring temperature

The pouring temperature of polishing material polishing wheel refers to the average temperature of the liquid metal when going into the cavity. Because it is not convenient to measure the indoor temperature of liquid metal, generally the temperature in the holding furnace would be adopted.

If the pouring temperature of polishing material polishing wheel is too high, the contraction will be also big and the casting is easy to produce cracks, large crystal grains, and self-sticking; If the pouring temperature of polishing wheel is very low, it will be easy to produce cold insulation, surface pattern, misrun and other defects. So the pouring temperature should be considered with pressure, die casting temperature and filling speed at the same time.