Plastic material are now being used to expedite the production of drill jigs, particularly in aircraft industry. Heavy plastic dies are used for sheet-metal stretching operations and they replace zinc-alloy dies. As these are light in weight, these can be ...

5.12 Grinding Machine Grinding machine is a machine used for the process of removing material by the abrasive action of a revolving wheel on the surface of a workpiece. The wheel used for performing the grinding operation is known as Grinding ...

5.11.6  Milling Operations The various operations that can be performed on a milling machine are Plain or slab milling          Face milling    Angular milling           Form milling Straddle milling    Gang milling 1. Plain or slab Milling It is the process employed for machining a ...

5.11.4 Principal parts of milling machine The main parts of milling machine are 1.          Base It is a heavy casting provided at the bottom of the machine. It is accurately mechined on both the top and bottom surfaces. Column of the machine is ...

5.11 Milling Machine Milling is the machining process in which metal removal takes place due to the cutting action of a revolving cutter when work is fed past it. The revolving cutter is held on a spindle or arbor. The work ...

5.10.2 Oxy-Acetylene welding equipment A typical oxy-acetylene welding equipment is shown in fig.5.59.   It contains the supply units for oxygen and acetylene with associated regulators and the torch, which mixes the two gases before they are ignited. The oxygen is normally ...

5.10.1 Gas Welding As the name indicates gas welding also called as oxy-fuel gas welding derives the heat from the combustion of a fuel gas such as acetylene in combination with oxygen. The process is a fusion welding process. The heat ...