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Front-end Thermal Design

GarethW 15th May '12, 21:00

iPhone & Android apps now available FREE!

GarethW 7th May '12, 15:20

Getting Started with 3D Printing

cwarner7_11 5th May '12, 23:33

Area of plane shapes

GarethW 28th Apr '12, 22:30

Electro-discharge machining (EDM)

GarethW 28th Apr '12, 07:40

Convert those units the easy way!

GarethW 28th Jan '12, 21:32
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Over the last 2.5 years we've worked incredibly hard to spread the word about the Forum in all...
GarethW 23rd Feb '12 22:05

On ACTA

By now, I think everyone has pretty much heard of the new babyborn law regarding intellectual...
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Front-end Thermal Design
by
GarethW

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Published on 15th May '12 21:00 Number of Views: 136
The thermal design has from its early days and forward focused on the calculation accuracy problem. Great progresses have been made. The best methods nowadays have a quality beyond what is needed for most standard applications. The back side of the coin is that these methods require plenty of detailed inputs, which makes them poorly adjusted to the requirements in the early phases of a design process.

This article will discuss several aspects of front and back end thermal design. It will also expose some front end methods that have been practised by the author for more than 10 years and still are competitive.
...

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iPhone & Android apps now available FREE!
by
GarethW

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Published on 7th May '12 15:20 Number of Views: 288
Great news! We are delighted to announce that our FREE apps are now available for iPhone, iPad and Android mobile devices.

This is the ultimate app for mechanical engineers! The MDF app gives you access to www.mechanicaldesignforum.com from your mobile device. Our popular discussion forums put a global network of mechanical engineers at your fingertips, allowing you to share knowledge, exchange ideas and make industry contacts. The MDF app also provides you with access to technical articles, including manufacturing process design guides and CAD tutorials.
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Getting Started with 3D Printing
by
cwarner7_11

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Published on 5th May '12 23:33 Number of Views: 368
Here is a description of my recent experiences building a 3D printer and getting it up and running, for those that might be interested in this technology.

Includes my first print results which turned out to have surprisingly good accuracy (although needing some tweaking to get things "printable"). Good accuracy? I can not measure the variation from 90º on my printed parts, all axes combinations. Dimensional tolerances are on the order of 0.7 mm., all three axes. At least half of this can be attributed to material shrinkage during cooling. Improving surface quality will most likely improve tolerances significantly. Coming soon - tweaking my 3D printer for improved print quality.
...

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Area of plane shapes
by
GarethW

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Published on 28th Apr '12 22:30 Number of Views: 347
Here's a useful guide to calculating the area of basic shapes.

...

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Electro-discharge machining (EDM)
by
GarethW

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Published on 28th Apr '12 07:40 Number of Views: 314
Process Description
Electro-Discharge Machining (EDM) is machining with sparks. The work-piece is held in a jig submerged in a dielectric fluid such as kerosene. A power supply generates rapid electric pulses that create a discharge between the work piece and an electrode (a continuous wire or a shaped graphite form) at the point at which the two are closest. The discharge creates a plasma causing the melting, and probably the vaporisation, of a minute bite of material, slowly eating into the work piece; the debris is swept away by the dielectric fluid. EDM is remarkable for its ability to shape difficult materials (provided they are conductors) and do so with great precision.
Any electrical conductive material can be machined irrespective of hardness.
...

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Convert those units the easy way!
by
GarethW

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Published on 28th Jan '12 21:32 Number of Views: 1375
Here's is a great piece of freeware. It's simply called "convert" by Josh Madison. It's an amazingly useful program - something that every mechanical engineer should have on their desktop! It's function is simple - it converts any imaginable unit of measure. Force, mass, volume, acceleration, density, distance etc. Here's a screenshot:

...

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Tips for Mechanical Engineers
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graphcomnsk

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Published on 28th Jan '12 18:00 Number of Views: 2012
These tips in detail’s are available in Handbook …… this is just to brush up ….. While working in industry for last 20 years, I found youngster has forgotten many basic things…. We all are required to read books on fundamental principals…..We don’t know when we are going to require the knowledge we learned in past ….. Let’s be prepared in the edge of Robotics…Working Experience can not be excuse for brushing your knowledge.
...

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Cutting processes - tolerance and surface roughness
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GarethW

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Published on 10th Dec '11 18:48 Number of Views: 1602
Here's a useful table of tolerance and surface roughness achievable with cutting and machining process (collectively termed "material removal processes"

This information has been collated personally by myself from a variety of sources. If you have any suggestions of processes to include in this table please leave a comment and they will be added.
...

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