COURSE : MECHANICAL WORKSHOP 1
EXPERIMENT NO : 2
TITLE OF EXPERIMENT : LATHE AND MILLING PROJECT
NAME : TANARAJ A/L LETCHUMANAN
SUREN BARATHI A/L ALAKESAN
MATRICS NUMBER : 4123010611
SEMESTER : 31234 “SEMESTER JULAI 2012”
GROUP : TANARAJ AND SUREN BARATHI
LECTURER NAME : MOHD ARIF BIN MAT NORMAN
DATE OF SUBMISSION : 26-11-2012
Introduction to Lathe and Milling
Lathe is a machine, which removes the metal from a piece of work to the required shape and size. There are three types of lathe which is engine lathe, bench lathe and tracer lathe. Engine lathe is the most common form of lathe, motor driven and comes in large variety of sizes and shapes. Bench lathe is a bench top model usually of low power used to make precision machine small work pieces. Tracer lathe is a lathe that has the ability to follow a template to copy a shape or contour.
Moreover in the lathe machine has a automatic lathe where a lathe in which the work piece is automatically fed and removed without use of an operator. Cutting operations are automatically controlled by a sequencer of some form. Turret lathe is called which have multiple tools mounted on turret either attached to the tailstock or the cross-slide, which allows for quick changes in tooling and cutting operations. Computer controlled lathe is a highly automated, where both cutting, loading, tool changing, and part unloading are automatically controlled by computer coding. On metalworking lathes, the cutting tools are held rigidly in a tool holder that is mounted on a movable platform called the carriage. The tool is moved in and out by means of hand cranks and back and forth either by hand cranking or under power from the lathe. The result is that material can be removed from the work piece under very precise control to produce shapes that are truly precision made. Dimensional accuracies of one-one-thousandth of an inch (.001") are typical. Because of the inherentrotational nature of a lathe, the vast majority of the work produced on it is basically cylindrical in form. In spite of this, the lathe is an extremely versatile machine capable of producing a surprising variety of objects.
Milling is the process of cutting away material by feeding a workpiece past a rotating multiple tooth cutter. The cutting action of the many teeth around the milling cutter provides a fast method of machining. The machined surface may be flat, angular, or curved. The surface may also be milled to any combination of shapes. The machine for holding the workpiece, rotating the cutter, and feeding it is known as the Milling machine. The milling process requires a milling machine, workpiece, fixture, and cutter. The workpiece is a piece of pre-shaped material that is secured to the fixture, which itself is attached to a platform inside the milling machine. The cutter is a cutting tool with sharp teeth that is also secured in the milling machine and rotates at high speeds. By feeding the workpiece into the rotating cutter, material is cut away from this workpiece in the form of small chips to create the desired shape. Milling is typically used to produce parts that are not axially symmetric and have many features, such as holes, slots, pockets, and even three dimensional surface contours. Parts that are fabricated completely through milling often include components that are used in limited quantities, perhaps for prototypes, such as custom designed fasteners or brackets. Another application of milling is the fabrication of tooling for other processes. For example, three-dimensional molds are typically milled. Milling is also commonly used as a secondary process to add or refine features on parts that were manufactured using a different process. Due to the high tolerances and surface finishes that milling can offer, it is ideal for adding precision features to a part whose basic shape has already been formed.
The objectives of the lathe and...