Effect wheel caused by unqualified

Wheel failure may have a variety, we also know some, and some we did not know, today we come to know the contents of some of the failed wheel, such as hardness failed, face runout, radial runout failed, and apertures substandard, let's take a closer look at it!

      1) Hardness failed

      Wheel hardness refers to the binding agent from the abrasive wheel surface resistance from the resistance in the external force, or the degree of difficulty understanding the abrasive wheel surface detachment. Hardness can more accurately reflect the performance of the grinding wheel, the wheel is an important indicator of quality. Wheel hardness of the assessment there are two requirements:

      Uniformity of hardness (hardness measured value of each point difference between maximum and minimum value) to comply with the provisions of the standard;) meet the hardness requirement that the arithmetic mean of the average value of hardness (hardness measured at each measuring point value ) to allow standard within the range. The proportion of unqualified hardness is quite high, such as flat-shaped grinding wheel hardness failed in more than 20% of its total failure.

      2) face runout, radial runout failed

      Face runout, radial runout failure would affect the balance and produce yaw performance, adverse impact on the machine tool and the workpiece when the wheel rotates, it should be controlled within the allowable range.

      3) failed aperture

      Wheel bore is to install the base, the aperture wheel failed as a "heavy flawed" in the standard. Large aperture, the eccentric wheel to generate after installation, so that the grinding wheel imbalance will increase high-speed rotational vibration, affecting the quality of grinding, grinding wheels and even lead to rupture, damage to the equipment. Pore ​​size is too small, not installed on the wheel can not be used, if forced to install, then scratch the spindle, the wheel can also make a dark wound, causes a rupture running wheel, easily lead to accidents. Aperture failed in the case of checks of the most serious. 16.7% of the total failure of the flat-shaped grinding wheel, wheel-shaped cymbals accounted for 58.2% of the total failure.