Difference between the chopper fed and converter fed drives ....etc

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The unconventional method of several specific advantages over conventional methods of machining and these promise formidable tasks to be undertaken and set a new recording in the manufacturing technology. EDM is one such machining process, which has been immense help to the manufacturing process engineers to produce intricate shapes on any conducting metal and alloy irrespective of its hardness and toughness.


CLASSIFICATION

1. Contact initiated discharge
2. Spark initiated discharge
3. Electrolytic discharge

ADVANTAGES

1. The pr ....etc

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ELECTRICAL DISCHARGE MACHINING
DIAGRM OF EDM
WORKING PRINCIPLE OF EDM
 In electrical discharge machining , metal is removed by producing powerful electrical spark discharge between the tool (cathode) and the work material 9anode). It is also known as spark erosion machining or electro-erosion machining….
CONSTRUCTION AND WORKING OF EDM
 Construction:
 The main components are the electrical power supply ,dielectric medium , work piece , tool and a servo control mech ....etc

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IMPROVEMENT OF CONCRETE DURABILITY BY COMPLEX MINERAL SUPER-FINE POWDER



Introduction
Coal gangue is a rock included in the coal bed and a waste discharged during coal
mining and transportation as well as the most industrial waste discharged in China. It
is estimated , that the amount of gangue calculated as 15% of the coal output,
there would be 100 million ton increment annually. Most of the coal gangue is a clay
rock; its main mineral compositio ....etc

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Introduction
Cement-treated or cement-stabilized soils have been used in pavement
base, subbase, and subgrade construction since 1915 because
cement has been effective in improving the engineering
properties of a wide variety of soils, including granular materials,
silts, and clays
PCA 1992. Usually, cement-treated soils are
mixed with low cement dosages with or without a targeted
strength, depending on their functions, whereas the cementstabilized
soils are mixed with high cement dosages with a targeted
st ....etc

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Abstract
This study aims to determine the influence of the content of water and cement, water–binder ratio, and
the replacement of fly ash and silica fume on the durability of high performance concrete (HPC) by using
artificial neural networks (ANNs). To achieve this, an ANNs model is developed to predict the durability of
high performance concrete which is expressed in terms of chloride ions permeability in accordance with
ASTM C1202-97 or AASHTO T277. The model is developed, trained and tested by using 86 dat ....etc

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Advanced technologies for 4G: Mobile broadband multimedia everywhere


Changing the wireless experience
The drive to 4G is being fueled by the promise of target peak data rates of
approximately 1 Gigabit per second
(Gbit/s) for low mobility (such as nomadic/local wireless access) and approximately 100 Megabits per second (Mbit/s) for high mobility (such as vehicular mobility). These data rates are part of the International Telecommunication Union (ITU) long-t ....etc

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STUDY ON DURABILITY OF FLYASH CONCRETE




INTRODUCTION

Fly ash is a byproduct of coal burning power plants - the ash that flies up their
smokestacks and gets captured in giant filters. It can be used to produce stronger, more
durable and more environmentally friendly concrete. When used in concrete, fly ash acts like
cement, and actually replaces a percentage of the Portland cement normally used. Concrete
with high percentages of fly ash looks and finish ....etc

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Finite-Element Simulation of Electrical Discharge Machining (EDM) Process


I. INTRODUCTION
Electric discharge machining (EDM), sometimes
colloquially also referred to as spark machining, spark
eroding, burning, die sinking or wire erosion, is a
manufacturing process whereby a desired shape is obtained
using electrical discharges (sparks). Material is removed
from the workpiece by a series of rapidly recurring current
discharges between two electrodes, se ....etc

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difference between chopper fed drives and converter fed drives pdf ....etc

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