CAM Layout

CAM Layout

CAM Layout - A Cam is a revolving inclined plane. It may be either an inclined plane wrapped around a cylinder in such a manner that the height of the plane is radial to the cylinder, such as the ordinary lifting cam used in stamp mills or it may be an inclined plane curved edgewise and rotating in a plane parallel to its base.

The study of cams is important because in automatic (screw) machines the slides and turrets are actuated by plate or disc cams while bar feed and collect clamping are operated by barrel cylinder cams.

As shown in Fig., a earn system consists of a cam (C) and a follower (F). The cam is connected with a frame in a turning pair and the follower is connected in a sliding pair.

Layout of Cams

The following steps are involved:

(I) determine the sequence of operations.

(2) Calculate throw of cams for each operation.

(3) Determine RPM of the work spindle.

(4) Calculate clearances.

(5) Find out total revolutions and cycle time.

(6) Correct cycle time for change gears.

(7) Convert revolutions into hundredths.

(8) Prepare cam design sheet.

(9) Design the cams: sizes, configurations, rises and drops.

(10) Draw cam profile.