In this article we will discuss about the economics of machining. It is not sufficient to devise a feasible procedure for a desired component or commodity. The procedure must be economically justified. The variables affecting the economics of a machining operation are numerous which include the tool material, machine tool capacity and the cutting conditions. As these variables are readily [...]
In this article we will discuss about:- 1. Purpose of Electro-Discharge Machining (EDM) 2. Machining Accuracy in EDM Process 3. Automation 4. Orbiting Control Facility 5. Advantages 6. Disadvantages 7. Applications. Purpose of Electro-Discharge Machining (EDM): In electrical machining processes, electrical energy is used directly to cut the material to final shape and size. Efforts are made to utilise whole [...]
In this article we will discuss about:- 1. Meaning of Wire-Cut EDM 2. Features of Wire-Cut EDM 3. Spark Machining. Meaning of Wire-Cut EDM: The wire-cut EDM uses a very thin wire 0.02 to 0.3 mm in diameter as an electrode and machines a workpiece with electrical discharge like a bandsaw by moving either the workpiece or wire. Erosion of [...]
The typical ECM machine consists of a table for mounting the workpiece. The tool is mounted on a quill fixed on a ram. Vertical box frame structure has excellent rigidity required and is best suited for precision work. Vertical C-frame structure has less rigidity but offers greater accessibility to the workpiece and tooling. The machine base, worktable and all other [...]
In this article we will discuss about:- 1. Meaning of Laser Beam Machining (LBM) 2. Principle of Laser Beam Production 3. Advantages 4. Limitations 5. Applications 6. Laser in Production Techniques. Meaning of Laser Beam Machining (LBM): Laser is an electro-magnetic radiation. It produces monochromatic light which is in the form of collimated beam. Through has been introduced recently but [...]
In this article we will discuss about the non-conventional methods of machining used in industries. The methods are: 1. Elastic Emission Machining (EEM) 2. Electro-Chemical Grinding (ECG) 3. Hot Machining 4. Electron Beam Machining (EBM). Method # 1. Elastic Emission Machining (EEM): In elastic emission machining process, machining is carried out by a spinning polyuera-thane ball in a suspended liquid [...]
In this article we will discuss about the meaning and characteristics of Electron Beam Machining (EBM) in industries. Meaning of Electron Beam Machining (EBM): In this process, the material is removed with the help of a high velocity (travelling at half the speed of light, i.e. 160,000 km/sec.) focused stream of electrons which are focused magnetically upon a very small [...]
In this article we will discuss about the meaning and characteristics of Plasma Arc Machining (PAM) in industries. Meaning of Plasma Arc Machining (PAM): When a flowing gas is heated to a sufficiently high temperature of the order of 16,500°C to become partially ionised, it is known as 'plasma'. In this process heat for machining is produced by convection from [...]
In this article we will discuss about:- 1. Manufacture Process for Cemented Carbide Tools 2. Types of Cemented Carbide Tools 3. Applications 4. Precautions. Manufacture Process for Cemented Carbide Tools: Cemented carbide tools (which are very suitable for machining cast iron, non-ferrous metals and such non-metallic substances as plastics and marble) are formed by pressing mixture of tungsten carbide and [...]
Electrochemical wire cutting process for removal of metal using a wire tool as cathode and workpiece as anode. The workpiece can be shaped by relative movement between it and the wire. The process is similar to wire discharge machining. This process is found to be best suited for cutting in one or two directions and fine drilling. Rectangular wire appears [...]