Manufacturingtechnologybyhajrachoudharypdffreedownload

The most popular method of manufacturing is machining. It is also the most commonly used manufacturing process for producing parts. Almost all metalworking companies employ machining as their most important activity. The purpose of this paper is to discuss how this type of manufacturing process creates complex geometries, provides improved surface finishes and reduces production costs by making improvements in the machine tool, cutting tool and workpiece design. Successful machining operations ensure high quality final products and reduce part-to-part variation through improved surface finishes and a reduction of scrap. Milling is a process used for cutting flat, cylindrical and some spherical surfaces in the shape of a cross section. This process is widely used in industries such as Aerospace, General Engineering, Automotive, Marine, Food Processing and Pharmaceuticals. Milling is a non-invasive method which produces high quality finish on the workpiece surface with relatively low production cost. In addition to this, milling offers good surface finish it also allows better design flexibility since it provides two or more different ways for machining the workpiece at the same time. The milling process begins with the clamping of the workpiece on its spindle. It is then given the required rotary command which will make it rotate at a continious speed during machining. This continuous operation of the whole machining setup makes sure that high precision workpieces are produced. After that, the material removal is done by using a milling cutter which has teeth on its periphery. These teeth rotate at high speeds while it travels over the surface of the rotating workpiece. The tool geometry and surface speed determines how much material is removed from a workpiece in a single pass. This process can be done manually or automatically by using CNC machines. Manual machines have a simple table which is tilted at a certain angle for cutting the workpiece. These tables may have positive or negative tilt angles. The advantages of milling are that it can be used for different types of manufacturing processes and the high cost efficiency it offers to the industries. It saves costs by minimizing scrap, improving productivity and surface finish of products, aiding quick turnaround time between jobs and reducing setup times. The disadvantages of CNC milling are that it requires more space than other manufacturing methods which makes it less favorable in smaller production environments. This process is widely used in industries such as Aerospace, General Engineering, Automotive, Marine, Food Processing and Pharmaceuticals. It is used for producing parts with flat surfaces, cylindrical and some spherical surfaces and shape of a cross section. Milling is a non-invasive method which produces high quality finish on the workpiece surface with relatively low production cost. In addition to this, milling offers good surface finish it also allows better design flexibility since it provides two or more different ways for machining the workpiece at the same time. A turning operation is divided into two parts: roughing and finishing. Roughing increases the size of the hole diameter while finishing improves its roundness and surface finish.

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