Principle of Metal Planing Operations

Principle of Metal Planing Operations

Principle of Metal Planing Operations - Fig. shows the principle of operation of a planer. The workpiece is clamped onto the worktable. The work table rides on the grooves on the base of the planer and is accurately guided as it travels back and forth.

Cutting tools are held in tool heads that can travel from side to side i.e., in a direction at right angle to the direction of motion of the worktable. Tool heads are mounted on a horizontal cross rail that can be moved up and down.

Principle of Operation of a Planing

Principle of Operation of a Planer

Cutting is achieved by applying the linear primary motion to the workpiece (motion x) and feeding the tool at right angles to this motion (motion Y and Z). The primary motion of the worktable is normally accomplished by a rack and pinion drive using a variable speed motor.

As with the shaper, the tool posts are mounted on clapper boxes to prevent interference between the tools and work piece on the return stroke, and the feed motion is intermittent.