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ME8073 UNCONVENTIONAL MACHINING PROCESSES. OBJECTIVE: To learn about various unconventional machining processes, the various process parameters and their influence on performance and their applications. UNIT I INTRODUCTION AND MECHANICAL ENERGY BASED PROCESSES 9.
Nontraditional machining processes, also called advanced manufacturing processes, are employed where traditional machining processes are not feasible, satisfactory or economical due to special reasons as outlined below.
- Abrasive Jet Machining
- Ultrasonic Machining
- Electro-Chemical Machining
- Electrical Discharge Machining
- Electron Beam Machining
- Laser Beam Machining
A high-velocity jet of dry air, nitrogen, or carbon dioxide containing abrasive particles (typically∼0.025mm) is aimed at the workpiece surface under controlled conditions. As particles impact the work surface, they cause small cracks, and the gas stream carries both the abrasive particles and the fractured (wear) particles away. The gas supply pre...
In ultrasonic machining, ultrasonic waves are produced using magnetostrictive effects which are converted into mechanical vibration. In this machining, the metal is removed from the workpiece by microchipping and erosion with fine abrasive grains in the slurry. The tip of the tool vibrates at a frequency of 20kHz and low amplitude (0.0125mm – 0.075...
In this machining, an electrolyte acts as a current carrier and a high rate of electrolyte movement in the tool and workpiece gas washes the metal ions away from the workpiece before they have to change to plate onto the tool. It is the reverse of electroplating. Modifications of this process are used for turning, slotting, trepanning, and profilin...
The electrical discharge machining is also called as electro-discharge or spark erosion machiningbased on the erosion of metal by spark discharges. The basic EDM system consists of the shaped tool (electrode) and the workpiece, connected to a DC supply and placed in a dielectric (electrically non-conducting) fluid. When the potential difference bet...
The electron beam machiningarrangement is made as shown in the figure. The cathode is made of tungsten or tantalum. Cathode filaments are heated to a temperature of around 2500°C, which leads to the thermo-ionic emission of electrons, which is further increased by maintaining a very low vacuum within the chamber. Just after the cathode, there is a ...
A laser is an optical transducer which converts the electrical energy into coherent light. Laser stands for “light amplification by stimulated emission of radiation”. The laser being coherent or consistent in nature a specific property to generate high power density. The laser is man-made ruby crystal, containing chromium or Aluminium oxide. LBM us...
Download Unconventional Machining Processes By Dr.N.Senthil Kumar, ARS Publications – The book “ Unconventional Machining Processes ” for Engineering and Technology studies.
An unconventional machining process is a specialized subject for mechanical engineering branch. It provides an insight of machines associated with specialized production. The purpose of this course is also to learn the need for various non–traditional machining methods.
On the EasyEngineering ME8073 Unconventional Machining Processes (UMP) page, the students can download the Local Author Book PDF, which contains unit wise Part-A 2 marks, Part-B 13 marks and Part-C 15 marks important questions with answers.
People also ask
Why do we use unconventional machining processes?
What are unconventional manufacturing processes?
What is a nontraditional machining process?
What is electrical energy based unconventional machining process?
Edge machining and sharp corners are possible in EDM process. The tool making is easier as it can be made from softer and easily formable materials like copper, brass and graphite.
