Slotting Machine Lab Report

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CHAPTER 3. CAM OPERATED PUNCHING AND SLOTTING MACHINE 3.1 Working principle Slotting machine can simply be considered as horizontal slotting machine where the single point cutting tool reciprocates horizontally and the work piece, being mounted on the table. In this machine also the length and position of stroke can be adjusted. slotting machine are generally used to machine internal surface like a flat. Formed grooves and cylindrical. slotting machine for their low productivity and generally used instead of general production for piece production required for repair and maintenance. punching is a metal forming process that uses a punch press to force a tool, called a punch, through the work piece to create a hole via shearing. The punch …show more content…

The punching machine is reciprocating machine tool in which, the cam containing rod holding the tool reciprocates in a vertical axis and the cutting action of the tool is only during the downward stroke the slotting machine is horizontal slide holding the cutting tool is reciprocated by a cam and connecting rod mechanism. so here quick return effect is absent. Punch tooling (punch and die) is often made of hardened steel or tungsten carbide. A die is located on the opposite side of the work piece and supports the material around the perimeter of the hole and helps to localize the shearing forces for a cleaner edge. There is a small amount of clearance between the punch and the die to prevent the punch from sticking in the die and so less force is needed to make the hole. The amount of clearance needed depends on the thickness, with thicker materials requiring more clearance, but the clearance is always less than the thickness of the work piece. The clearance is also dependent on the hardness of the work piece. The punch press forces the punch through a work piece, producing a hole that has a diameter equivalent to the punch, or slightly smaller after the punch is removed. All ductile materials stretch to some extent during punching which often causes the punch to stick in the work piece. In this case, the punch must be physically pulled back out of the hole while the work is supported from the punch side, and this process is known as stripping. The slug from the hole falls through the die into some sort of container to either dispose of the slug or recycle

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