Slotting operation

Slotter Operations

1. Machining cylindrical surface.
2. Flat surface Machining.
3. Machining irregular surface and cam machining.
4. Machining slots, keyways and grooves.

1. Flat Surfaces Machining

The external and internal flat surfaces may be generated on a workpiece easily in a slotter machine. The work to be machined is supported on parallel strips so that the tool will have clearance with the table when it is at the extreme downward position of the stroke.

The work is then clamped properly on the table and the position and the length of the stroke is adjusted. A clearance of 20 to 25mm is left before the beginning of cutting stroke, so that the feeding movement may take place during this idle part of the stroke.

The table is clamped to prevent any longitudinal or rotary travel and the cut is started from one end of the work. The crossfeed is supplied at the beginning of each cutting stroke and the work is completed by using a roughing and a finishing tool.

While machining an internal surface, a hole is drilled into the workpiece through which the slotter tool may pass during the first cutting stroke.

A second surface parallel to the first machined surface can be completed without disturbing the setting by simply rotating the table through 180° and adjusting the position of the saddle. A surface perpendicular to the first machined surface may be completed by rotating the table by 90° and adjusting the position of the saddle and cross slide.

2. Machining Circular Surfaces

The external and internal surface of a cylinder can also be machined in a slotter machine.The work is placed centrally on the rotary table and packing pieces and clamps are used to hold the work securely on the table.

The tool is set radially on the work and necessary adjustments of the machine and the tool are made.

The saddle is clamped in its position and the machine is started.

While machining, the feeding is done by the rotary table feed screw which rotates the able through a small arc at the beginning of each cutting stroke.

3. Machining Irregular Surfaces or Cams

The work is set on the table and necessary adjustments of the tool and the machine are made as detailed in other operation.

By combining cross, longitudinal and rotary feed movements of the table any contoured surface can be machined on a workpiece.

4. Machining Grooves or Keyways

Internal and external grooves are cut very conveniently machine.

A slotter is specially intended for cutting internal grooves which are difficult to produce in other machines.

External or internal gear teeth can also be machined in a slotter by cutting equally spaced grooves on the periphery of the work.

The indexing or dividing the periphery of the work is done by the graduations on the rotary table.

Credit:- https://www.theengineerspost.com/slotter-machine/