Volume: 28
Issue: 18
October 2014
“Nibble – ADFL’s newsletter”
An in-house-monthly magazine
Indian Maintenance Expo, Coimbatore
Important Days in November
We participated in Indian Maintenance Expo, which was held at Coimbatore during Sept 19-21. The expo was
organized by CII. We showcased – welding consumables, equipment, wearplates, ceramic tiles and pulley
lagging. Mr. Pon Radhakrishnan, Minister of State for Heavy Industries and Public Enterprises inaugurated the
expo. Mr. Radhakrishnan took great interest in our products when he visited our stall.
Over 70 companies displayed diverse products for maintenance; like bearings, lubricants, material handling,
welding electrodes, surfacing solutions, paints etc. This was the first time CII organized any exhibition in the city
of Coimbatore.
Nov 10 : World Science Day for
P e a c e
a n d
Development
Nov 14 : World Diabetes Day
Nov 16 : W o r l d D a y o f
Re m e m b ra n c e fo r
Road Traffic Victims
(Third Sunday)
Nov 19 : World Toilet Day
Nov 20 : Universal Children’s Day
Nov 20 : World Philosophy Day (3
November)
rd
Thursday in
Nov 21 : World Television Day
Nov 22 : Africa Industrialization Day
Nov 25 : International Day for the Elimination of
Violence against Women
Nov 29 : International Day of Solidarity with the
Palestinian People
Quiz - 16
1. Who are the 2 people shaking hands in this picture.
2. Which is this building in India & what is so unique about it?
Know your Principal
Kennametal Stellite formerly known as Deloro
Stellite, was acquired by Kennametal on January 17,
2012.
Kennametal Stellite™ provides products and services
to businesses in a variety of different industries where
problems with wear (heat, abrasion, corrosion,
erosion and galling) in products that often operate in
harsh conditions give rise to shortened working life,
high maintenance cost and high downtime.
Kennametal Stellite produces its own proprietary
metal alloys from cobalt and nickel which have
outstanding metallurgical and physical properties
which are ideally suited to solving these wear
problems.
Backed up by a substantial R&D facility, 13 facilities in
nine countries manufacture these sophisticated alloys
and then convert them via a number of processes,
described below, into materials (rod, wire, powder
and electrodes) that are mostly used by clients
offsite, or into customer-designed components
(usually cast) which may also be finished in their
machine shops and generally form a small, but critical
part of the customers’ own product.
Kennametal Stellite’s expertise in engineering
complex solutions to customers’ ‘wear problems’
provides a technical partner enabling them to
produce products with competitive advantage in
their own market places because they last longer,
perform better and are more cost effective.
Castings: a variety of casting processes using Sand
(Sand Casting), Resin (Resin Casting), Investment
(Investment Casting), Centrifugal (Centrifugal
Casting) to produce a range of components from a
wide array of alloys.
Powder metallurgy: production of small,
regularly shaped components using formed metallic
powders.
Coating services: the application of wearresistant materials to critical areas of components.
Uses products from the Consumables Division as well
as other alloys brought in from external suppliers.
Machining: full machining of complex shapes in
extremely hard materials.
Consumables manufacturing:
manufacture of a variety of predominantly cobaltand nickel-based rod, wire, powder and wrought
products for welding, thermal spraying.
Equipment design & manufacture: world-class
PTA coating.
ADFL signed an exclusive distributorship with
Kennametal Stellite in the year 1994 to represent
their range of Stellite products from Kennametal
Stellite (Germany, UK & USA).
3. Which body organ is the most affected by Hepatitis ?
4. Jalandhar in Punjab is famous for which indusrty ?
5. Which country was formerly known as 'Formosa' ?
One winner will be selected from the draw of all
correct entries received before 5 pm on Oct 24,
2014.
Answers for Quiz-15
1. Vitamin C
2. Bonsai
3. Taiwan
4. Gautam Buddha
5. Bill Gates and Steve Jobs
Winner of Quiz– 15
Subhash CV, Mumbai
Volume: 28
Issue: 18
October 2014
“Nibble – ADFL’s newsletter”
An in-house-monthly magazine
Mobile – “Friend or Foe”
Venkat Raman Nagpur
It is true that there are advantages to cell phones:
making emergency calls, catching up with friends,
getting business done while on the train, bus, and so
forth. In general, everyone is concern about the
advantages of mobile phones but I would like to
mention few disadvantages so that people think twice
before making unwanted calls.
!
How cell phones might harm the body
Thermal: Radiation can elevate body temperature
(think: microwave oven). With a cell phone in our
pocket or by our head, slight temperature increase
might disrupt cellular functioning.
Non-thermal: Radio frequency energy can alter
cell membrane permeability, the movement of
calcium ions, cell excitability, free radical production,
blood-brain barrier integrity, the stress response
and/or neurotransmitter release.
Effects on brain health
There are a few indicators of how cell phone use
might affect the brain. For example:
!
Brain glucose metabolism around the area of the
cell phone antenna tends to increase while the cell
phone is in use (by the head).
!
Alpha brain waves (a sign of relaxed brain activity)
seem to increase with cell phone use. Data isn’t
consistent here and variations might be due to the
type of cell phone used.
!
Cognitive performance (e.g. attention and
memory) are another possible indicator, but data
on the cognitive effects of electromagnetic fields
from cell phones are mixed
Ef fects on reproduction, fer tility &
pregnancy
There are some potential problems with
electromagnetic radiation and testicular tissues. For
example:
!
More cell
phone use is
correlated to
less sperm
m o t i l i t y,
altered sperm
morphology
a n d
a
decreased
sperm count. Animal studies have shown a
decrease in testicular size and sperm cell death
with exposure to electromagnetic radiation.
!
Cell phone radiation might also lead to lower
testosterone and testicular cancer.
Effects on sleep & immunity
While the exact relationship isn’t clear, it seems that
cell phone use might affect sleep patterns and
neuroendocrine function. For example
!
The light from electronic screens can affect our
brain’s circadian clock. Electromagnetic radiation
can also alter melatonin production and brain
activity during sleep. Melatonin is involved with
sleep, metabolic health, and other processes.
!
Some cell phone users report more fatigue and
headaches. It’s unclear if these factors are related
to other variables (like overworking, or
constantly focusing the eyes to see the text on the
screen).
!
There are co-releations between cell phone use
and the development of non-Hodgkin’s
lymphoma.
Effects on skin & joints
!
Modern technology has been implicated as a
cause of various skin conditions, often to the
hands and face. Cell phone dermatitis can be
related to nickel, chromium, and/or cobalt
sensitivity. Frequent users of smart phones have
also reported conditions such as “Blackberry
thumb” and “phone neck” — minor but still
annoying tendonitis or muscle pain.
In addition to the above, other problems include
impaired concentration, General Sickness, Eye
Problems, Increased Stress, Risks to the Unborn,
Neurodegenerative Disorders, Heart risks, Loss
of Hearing, Brain Cancer, etc,.
Suggestions For A Safe Mobile Usage
!
Simplify your phone. Additional capabilities on
cell phones might mean additional health risks.
!
Use it less. If you can use a landline for a call (i.e.,
phone with a cord), do it.
!
Turn it off. A cell phone only emits radiation when
it’s turned on.
!
Text more. Texting can reduce radiation exposure
to the brain.
!
Set limits for kids. Use landlines for most calls.
!
Don’t hold a cell phone next to your head. Use a
hands free device/ear piece. Use the speaker
function when possible.
!
Keep cell phones away from your body. Instead of
keeping them in your pocket, keep them in a
purse, man-purse or backpack. The farther the
cell phone is away from your body, the less
exposure you have to the radio, frequency
(another benefit of texting).
!
Pregnant women: don’t keep a cell phone next to
your body (when it’s turned on).
!
Men: avoid keeping a cell phone in your pocket
(when it’s turned on).
Efficient Power Sources
For Welding Somnath Roy Delhi
Welding as a manufacturing process, is assuming a
major role in the country’s attempt to integrate itself
with global economy. In the last decade or so,
substantial advancement have been made in this field,
in terms of technology, equipment & consumables,
the basic aim being to meet the ever increasing
requirements of quality & productivity.
It is established fact that besides quality consumables
& skill levels of operators, a good power source can
contribute significantly towards obtaining a high
quality weld. This source needs to have the following
features in order to deliver weld beads of high quality
coupled with maximum productivity.
Inverter power services are very stable, having static
and dynamic characteristics with quick dynamic
response. It enhances portability, quality of welding
with minium maintenance.
Traditional Power Sources
There are a range of conventional power sources
available today such as transformers, rectifiers & motor
generators in the context of aforementioned features,
Transformer produce an AC output just by reducing the
primary voltage which, in turn, increases the current. Since in
an AC output the arc extinguishes twice every cycle, it gives
rise to non –homogeneity in the bead profile & increases
chances of slag/ gas entrapment. Transformers are thus not
the right choice for producing high quality.
Rectifiers produce DC output which is good for quality
welding. However, due to high ripple factor in the output,
slower response & dependence of output on input variations,
the ultimate quality in welding is not obtained. These power
sources are bulky & hence are not exactly portable. Motor
generators produces a good DC output but, since several
moving components are involved, maintenance cost are high.
These are again not easily portable, have low electrical
efficiency & noise levels are also very high.
Inverter Technology
To overcome various short comings & get the most out of
required features, the latest welding power source based on
inverter technology has been introduced. An inverter based
unit gives DC output in the following steps 50/60 Hz AC
rectified to DC & filtered, DC is inverted to very high
frequency AC( 21KHz -100KHz) high voltage high frequency
is stepped down to low voltage & high frequency AC & low
voltage is again converted to DC & filtered. An inverter based
power source offers the following benefits:
Faster response time
This is perhaps the inverter’s most important feature. One
outcome is rapid arc start-up associated with the inverters,
resulting in better initial penetration & less spatter which can
result in lower rejection rate & less clean up costs.
Extremely low ripple
The sine wave ripple pattern of inverters helps maintain a
very stable arc. The arc is stable even at very low current
levels, where conventional machines cannot impart this
stability. The input power quality is also less critical with
inverters, as they are able to produce a very consistent arc,
regardless of primary power quality.
Size: With inverters, large capacity power sources are now
as portable power source as the low amperage machines of
yesteryear . Inverter also require less floor or shelf space.
Efficiency: Small transformer size & the inverter’s circuitry
allows for better & more efficient use of primary power.
Energy consumption is substantially less than conventional
power source.
Primary Power requirement: Some inverters can be
used on either three phase or single phase input power. As
the input is immediately rectified & converted from AC to
DC, the type & quality of input power is less critical.
Reducing Idling Losses: Since the control is on the
primary side , the idling losses are cut down up to 60% over
conventional rectifier power sources.
Interesting facts about Mangalyaan
1.
India is the first
country to conduct a
successful Mars
mission 'Mangalyaan'
on its first try after
US, European Space
Ag e n c y a n d t h e
former Soviet Union.
2. Mangalyaan's on-orbit mission life is less than ten months.
3. The essential target of the mission is to showcase nation's
rocket launch frameworks, shuttle building and
operations capacities.
4. Mangalyaan is equipped with at least five solar powered
equipments which will accumulate the information on
Martian Climate and water, if it still exists on Mars. The
Orbiter is expected to investigate the surface of the
planet, availability of minerals and environment.
5. The closest and farthest points of the Orbiter from Mars
will be 365 Km and 80,000 Km respectively.
6. The Mission was carried out in a period of 15 months,
utilizing an amount close to Rs. 450 cr.
Editorial team: Prakash Nimbalkar, Manjula and Arvin – nibble@adorfon.com