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Wednesday, November 8, 2017

What is the importance of setting drawing Limits in AutoCAD ?

AutoCAD is a drafting software and requires dimensions to be specified on the drawing which has its overall size depend on the how big or small the drawing is. 

AutoCAD has unlimited space in which one can draw the drawing but in real life, one has to either print it or get it into the physical world so, the one has to prefix the size of the drawing. 

What is LIMITS command?

The LIMIT command in the AutoCAD helps you to set the working space or canvas size into which the complete drawing can be made. When you write LIMITS in the command bar, you will be prompt for Lower Left Corner coordinate location. Normally you can set it to (0,0) while the drawing's Upper Right Corner coordinate require entering coordinate of the point on the upper right corner of the drawing area. 

Friday, November 3, 2017

Is it necessary to learn AutoCAD for any Mechanical Engineer?

Any software is a tool for making a task easy in a computer. If you are an engineer, there are plenty of software prepared for the special task. Out of them, AutoCAD is also a very important software.

AutoCAD is all about CAD (Computer Aided Design). If you are a mechanical engineer, you have to design or manufacture a product or component of any machine or mechanism. 

In industry, work is continuously done and one has to rely on the computer instead of a manual task. The same is true for drawing of any product. There are plenty of chances to have an error or many errors in handmade drawing and this will cost a lot for any company. So, design department of any company has AutoCAD in their PCs. They have special persons to do this task. 

Why AutoCAD is must for Mechanical Engineer

If you are in final year of BE or ME or MTech, you should be supposed to prepare an experimental setup (if your project demands). You have to prepare a drawing for entire setup or part of it and hand over to the manufacturer who fabricates or prepare it for you. Most of the manufacturer ask for the AutoCAD file. Because they have CNC machines which can do the task in automatic mode based on the code generated from AutoCAD file of your drawing. 

So, it is very necessary for you to learn AutoCAD if you are a Mechanical Engineer. Even Electrical and Civil people have their own version of AutoCAD. 

Refer the following book on AutoCAD for getting knowledge on it.

Sunday, October 29, 2017

M.E. or M. Tech. dissertation topics for Thermal specialization

  • Influence of operating parameters on performance and emissions of engine using ethanol
  • Energy efficiency in industrial utilities
  • Efficiency improvement in pump used for saltwater conversion into potable water 
  • Alternative fuel IC engine, modification for ethanol
  • Cavitation in engine cooling fuel due to piston-cylinder assembly forces
  • Development of traveling wave thermoacoustic engine
  • Investigations on pulse tube cryocooler
  • Numerical and experimental investigation on backward swirl can type combuster
  • Fluid-structure interaction

M.E. or M. Tech. dissertation topics for Design specialization

This article gives dissertation topics for machine design specialization in masters of engineering or master of technology.

  • Mechanical design optimization using advanced techniques
  • Shape optimization of engineering product using FEM
  • Vibration and fatigue analysis
  • Vibration analysis of turbomachines components
  • Vibration analysis of rotor and rotating component
  • Fatigue and failure analysis of turbine blade
  • Vibration analysis of hydro turbine test rig
  • Limit load estimations of pressure vessels

M.E. or M. Tech. dissertation topics for Manufacturing specialization

  • Study of flushing methods in EDM
  • Experimental investigation on mechanical properties of aluminum alloy welds made by friction stir welding process
  • Study of tribological parameters in multi-cylinder engine
  • Integration of CAD/CAM for spur gears
  • Incremental forming
  • Optimization of process parameters of the ECM
  • Dry sliding wear and friction characteristics of Al alloy
  • Tribological study on vertical multi-effect distribution plant at CSMCRI plant Bhavnagar
  • Study of automobile lubricants

Monday, October 16, 2017

What would happen if compressor is removed from the refrigerator?

Simply, the refrigerator would STOP! but why?

To answer this question, one needs to know the Second law of thermodynamics (Clausius Statement) which states "It is impossible to construct a heat pump which continuously takes away the heat from low-temperature region to high-temperature region without taking any external work". 

Here, the heat pump is our refrigerator which keeps on throwing heat from low-temperature environment to room temperature. As per the above statement, external work is must to run the refrigerator. That external work is represented by "Compressor".