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OPERATION OF THE SHAPER MACHINE AND WORKING PRINCIPLES OF SHAPER MACHINE ?

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OPERATION OF SHAPER MACHINE



The workpiece mounts on a rigid, box-shaped table in front of the machine. 

The height of the table can be adjusted to suit this workpiece, and the table can traverse sideways underneath the reciprocating tool, which is mounted on the ram. Table motion may be controlled manually, but is usually advanced by an automatic feed mechanism acting on the feedscrew. The ram slides back and forth above the work.

 At the front end of the ram is a vertical tool slide that may be adjusted to either side of the vertical plane along the stroke axis. 

This tool-slide holds the clapper box and tool post, from which the tool can be positioned to cut a straight, flat surface on the top of the workpiece. The tool-slide permits feeding the tool downwards to deepen a cut.

 This adjustability, coupled with the use of specialized cutters and toolholders, enable the operator to cut internal and external gear tooth








WORKING PRINCIPLES OF SHAPER MACHINE






A single point cutting tool is rigidly held in the tool holder, which is mounted on the ram. 

The work piece is rigidly held in a vice or clamped directly on the table. 

The table may be supported at the outer end.

The ram reciprocates and thus cutting tool held in tool holder moves forwards and backwards over the work piece. 

In a standard shaper, cutting of material takes place during the forward stroke of the ram the backward stroke remains idle.

 This is obtained by "Quick Return Mechanism". 

The depth of the cut is adjusted by moving the tool downwards towards the workpiece. 

The feed motion is given to the workpiece and follows the "Pawl and Ratchet mechanism".














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