When the slide block is at c, the ram is at the maximum upward position of the stroke and when it is at, the ram is at the maximum downward position. The length of the ram is equal to twice the throw of eccentricity and it is equal to 2*3B (3B= throw of eccentricity). The pin 3 on the disc rotates in a circular path about the fixed point B. This causes the disc to rotate through the main shaft. The crankpin and the slide block rotate in a driving plate about B. The disc is connected to the lower end of the connecting rod eccentrically by means of a pin in a radial T-slots on the face of the disc, which converts the rotary motion of the disc into reciprocating motion of the ram connected to the top end of the connecting rod.Ī and B are the fixed centers of the bull gear and the driving plate. So that when bull gear rotates, imparts rotary motion to the driving plate and shaft causing the disc to rotate at the end of the main shaft. It holds the crankpin with a sliding block and slides on a driving plate. The driving plate is connected to the main shaft through the fixed hub. The bull gear is mounted on a fixed hub at the rear end of the machine and it is rotated by a driving pinion from the motor. Variable speed reversible motor drive mechanismĪ simple whit worth quick return mechanism as shown in the figure.Slotter Machine Mechanism:įollowing are the slotter machine ram drive mechanism: The ram is mounted on the guideways of the column and reciprocates by holding the tool at its bottom end of the tool head. The rotation of the table may be effected either by hand or power. T-slots are cut on its top surface for holding the work by clamping devices. The table may be graduated in degree for indexing or dividing the periphery of the jobs. It can be rotated by rotating the worm which meshes with a worm gear connected at the underside of the table. The slotter is provided with a circular table mounted on the top of the cross slide. The movement of the slide may be controlled either by the power to give the cross feed. It is mounted over the saddle guideways and made to move parallel to the column face. The top surface of the saddle is provided with accurately machined guideways perpendicular to the guideways on the bed for moving the cross-slide. The saddle is box-like casting mounted over the guideways on the bed surfaces and it moves toward or away from the column and either by hand or power control to give the longitudinal feed to the work. Column houses the ram driving and feeding mechanisms.Īccurately machined guideways are provided on the front face of the column on which the ram is made to reciprocate. It is a vertical member and cast integral with the base. These guideways are perpendicular to the column face. The top surface of the bed is accurately machined to provide guideways on which the saddle is mounted and slides. It is a rigid cast iron casting built to take up all the cutting forces and the entire load of the machine.
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