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Tuesday, 26 November 2013

Internal Grinding Operation

Internal Grinding Operation Points : Internal Grinding Operation, Procedure for a Straight Cylinder Internal grinding produces a smooth and accurate surface in a cylindrical hole. The surface may be straight, tapered, or irregular. Internal grinding is a form of cylindrical grinding. This type of grinding may be done on universal grinding machines, internal grinding machines, and with tool post grinders mounted on lathe.

In this grinding operation, the work is mounted in a chuck and rotates. During the grinding operation the revolving grinding wheel moves in and out of the hole. A special grinding machine which finishes holes in pieces too large to be rotated by the conventional machine. The hole, diameter is controlled by regulating the diameter of the circle in which the grinding head moves.
Procedure for a Straight Cylinder
  1. Obtain the work-piece and a suitable chuck.
  2. Mount the chuck on the headstock spindle.
  3. Determine the desirable work-piece rpm and make the necessary adjustments.
  4. Determine the desirable wheel rpm and make the necessary adjustments.
  5. Determine the desirable rate of table travel, if any. Make adjustments accordingly.
  6. Position the internal grinding spindle, and clamp or bolt securely.
  7. Mount the flat belt from the motor to the internal grinding spindle drive pulley.
  8. On machines equipped with a motor selector knob, turn the knob to the internal position, so that the internal grinding motor will be operative.
  9. On machines equipped with an internal-external grinding selector knob, turn the knob to the internal grinding position.

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