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 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. 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:- 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 [...]
In this article we will discuss about:- 1. Meaning of Abrasive Jet Machining (AJM) 2. Effect of Various Parameters on Metal Removal Rate (MRR) 3. Characteristics 4. Applications 5. Advantages 6. Limitations. Meaning of Abrasive Jet Machining (AJM): In this process a focused steam of abrasive particles (of size 10 to 40 microns) carried by high pressure gas or air [...]