1 1.0 TITLE: CNC Milling (Non Traditional Machining 2) 2.0 INTRODUCTION Removal of materials need to use tools that are harder than the material. New materials have improved mechanical, thermal and chemical properties. Traditional machining processes such as turning, drilling, shaping and milling sometimes cannot machine these brittle and extremely hard materials. There are also materials which are too flexible to resist cutting forces or too difficult to clamp. Besides that, in some cases, requirements for surface finish and tolerances are very high. Therefore, non-traditional machining is used to overcome these problems. Non-traditional machining uses different source of energy to generate machining action. Examples of the energy source are mechanical, thermal, electrical and chemical. Sometimes it can also be the combination of these energies. Computer numerical control (CNC) machining is an example of many types of non-traditional machining. Many of the operations performed by drilling and cutting machines can be achieved by milling machining process. A cylindrical rotating cutting tool is used in milling. A variety of holes and shapes can be created as the cutting tool can move along multiple axes. There are several types of CNC machine. CNC milling machine is the most widely used among them.
2 2.1 THEORY NC machines have took the biggest role from manual tools to NC machines. NC machines is a cutting machine used to perform a removal process of unwanted part in order do the finishing. Many improvements have been made to the milling machine such as accuracy and also speed. There are two classifications of NC machine, which is cutting machines and also non cutting machines. Cutting machines is machines that that do a removing process in order to make a finished part. For an instance, milling, turning and EDM machine. Whereas, for a non cutting machines, the shape of blank material was changed by force applied to it. For example, a press machine.
You've reached the end of your free preview.
Want to read all 12 pages?
- Fall '18
- Milling machine, Numerical control, CNC milling machine