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W7, TOOL ROOM PROCESSES TECHNOLOGY ASSIGNMENT TOPIC: HELICAL MILLING OPERATION The below assignment concerns helical milling operation. Find the instruction to access the assignment, use the link below: TOOL ROOM PROCESSES TECHNOLOGY ASSIGNMENT

  Helical milling HOME PAGE Dividing head driven by drive to the table – Helical milling Helical milling is milling any type of shape that has a helical form. Of course, one of the most common forms is that used for making helical gears. Because so many people are interested in making helical gears this is covered in a group of pages: see Making helical gears – links The most common way is by using a vertical milling machine: see Making helical gears using a vertical milling machine This page covers all other types of helical milling Helical milling on horizontal or vertical milling machines Helical milling can be done on either horizontal or vertical milling machines. Since most amateurs only have a vertical milling machine this is what will be assumed here. Helical milling – using vertical type cutters – vertical mode Using a Ball ended cutter A very simple application of helical milling is machining a helical grooves for lubrication purposes. For this purpose the groove would be cut

 MILLING CUTTERS ANIMATION

  CAM MILLING OPERATION VIDEO

DEFINATION OF A CAM   A cam may be defined as a rotating, reciprocating or oscillating machine part, designed to impart reciprocating and oscillating motion to another mechanical part, called a follower. A cam and follower have, usually, a line contact between them and as such they constitute a higher pair. The contact between them is maintained by an external force which is generally, provided by a spring or sometimes by the sufficient weight of the follower itself. Classification of Cams Cams are classified according to : (a) Shape (b) Follower movement (c) Type of constraint of the follower According to Shape Wedge and Flat Cams It is shown in Figures 1.48(a), (b), (c) and (d). In Figure 1.48(a), on imparting horizontal translatory motion to wedge, the follower also translates but vertically in Figure 1.48(b), the wedge has a curved surface at its top. The follower gets an oscillatory motion when a horizontal translatory motion is given to the wedge. In Figure 1.48(c), the wedge is

  TYPES OF CAMS What Is Cam? When two links are joined either along a line or at a point, it is called a high pair. Two such high pairing mechanisms will be incorporated into the cam-follower system. A high pairing mechanism is known as a cam and follower. 1. Disc or Plate Cam The disc or plate cam is a type of cam in which the follower moves radially from the center of rotations of the cam. This cam is very popular due to its simple design & compactness, which can be fitted in remote locations. Disc or plate cams have applications in IC engines and machine tools. 2. Cylindrical Cam The cylindrical cam is a cam in which the cylinder is rotated about its axis, and circumferential contours are cut on the surfaces of the cylinder. They are also of two types. In the first type, a groove is cut on the surface of the cam and roller and has a positive oscillating motion. The other has a cylinder as the working surface. In this type of cam, the spring-loaded follower translates into a cyli