Definition: The end face of the grinding wheel is not on a horizontal surface.

Inspection method: Place it on a flat plate on a horizontal plane, visually find the largest gap, and then measure it with a feeler gauge.

Harmfulness:

  1. When the grinding wheel rotates, irregular rotation is formed, the equipment swings left and right, and the operator’s labor intensity is high.
  2. During operation, the grinding wheel is susceptible to irregular forces, resulting in irregular sand-out and rapid consumption of the grinding wheel.
  3. The main shaft of the equipment is easily damaged due to the swing of the grinding wheel.
  4. Due to the swing of the grinding wheel, the machining accuracy of the workpiece is poor.
  5. When the cutting wheel is cutting, the incisions are uneven, and the wheel is susceptible to lateral force, and it is easy to fall off the flange and rupture, causing personal injury to the user.

Cause of:

  1. Uneven mixing, uneven internal stress of the grinding wheel during hardening, resulting in deformation and excessive flatness.
  2. The mixture is not parked for enough time, the bulk density is unstable, the structure of the grinding wheel is uneven, and the internal stress of the grinding wheel is uneven during hardening, resulting in deformation and excessive flatness.
  3. Uneven material distribution, uneven internal stress of the grinding wheel during hardening, resulting in deformation and excessive flatness.
  4. The warp and weft lines of the mesh are irregular, and the irregular internal stress of the mesh is greater than the internal stress of the grinding wheel during hardening, resulting in deformation and excessive flatness.
  5. The glue content of the mesh is too high, and the internal stress of the mesh is greater than the internal stress of the grinding wheel during hardening, resulting in deformation and excessive flatness.
  6. The hardened tooling itself is not flat, causing the grinding wheel to deform and the flatness to exceed the standard.

Definition: The difference between the maximum and minimum thickness of the grinding wheel is its parallelism.

Inspection method: Measure with a vernier caliper with an accuracy of 0.02mm.

Harmfulness:

  1. The thickness of the grinding wheel is uneven, and the equipment swings from side to side during operation, and the operator’s labor intensity is high.
  2. The internal density of the grinding wheel is uneven, and the grinding wheel consumes unevenly during use, resulting in vibration, and the operator feels poor
  3. The main shaft of the equipment is easily damaged due to the vibration of the grinding wheel.
  4. Due to the vibration of the grinding wheel, the machining accuracy of the workpiece is poor.

Cause of:

  1. The indenter column bolts are loose, causing the indenter to be not parallel to the lower platform.
  2. The indenter is worn and biased, causing the indenter to be not parallel to the lower press table.
  3. Dirt sticks to the mold, cover plate, and lower press table, and the cleaning is not timely.
  4. Irregular hardening and stacking.