Project Crane - Group E

After compiling all the research work and calculations done by us in this blog, I can conclude that our crane emerges as one of the most unique, effective and high performance cranes and fulfills all the requirements as specified in the tender proposal.

Some main features include:

· Unique and Simple design

· Ease of use

· Manual and Electrical Winch for easy usage

· Competitive price than other groups

· Discount available on big orders as mentioned by finance manager

· Easily assembles/disassembles in a Land Rover

· Extremely Light weight material used i.e. Aluminum 7075

At the end, I would like to conclude that this group work was very interesting for me because I had a chance to work as a team with my fellow class mates and all of us were very devoted to this work. All of us regularly attended meetings although we had too much work load but still we tried our best. Although, one member of the group did not turned up but still we divided the work load equally and discussed the mistakes and then made improvements in our crane.

As the last words, I say that you won’t be disappointed if u buy the cranes for us and we will try our best to serve you and the victims of the disaster relief areas.

I have used Mohr`s circle to calculate Maximum Tensile Stress/Shear Force that the crane can go to.

Please keep in mind that this was to be done by Xavier(Stress Analysist) but I and victor had to contribute at the last moment.

The material chosen for our crane is Aluminum 7075-T6. Although, we searched for many different materials but after group meetings and extensive researches we chose Aluminum 7075 as the final material.

Following are its properties in more detail than in my previous post:

Characteristics of Aluminum 7075

· Alloy made mainly from Zinc. Other includes chromium, copper, magnesium e.t.c.

· Light Weight and Smooth surface with dull finish

· High Strength to Weight Ratio, Corrosion Resistant

· Used For High Strength Applications

· Good Ductility

· Used in Aircraft fittings, gears and shafts, fuse parts, meter shafts and gears, missile parts, regulating valve parts, worm gears, keys,, aircraft, aerospace and defense applications

· Also used in bike frames, all terrain vehicle (ATV) e.t.c.

So this is why we chose this as our material for the crane and the next post will contain the stress analysis of the crane.

Please note that we will not be using aluminium 7075 in the screws and bolts used because it is alot expensive to use this alloy in nuts and bolts so to make the crane cheaper, we will be using steel to make nuts,screws and bolts. Although, these can be prone to corrosion but regular inspection can reduce these problem to a great extent.

This is the final design of the crane which we finalized in the group meeting this week.

Some key points are as follows:

• The crane is very light weight and has a very compact design.
• There is no need for a counterweight in the design.
• Spider legs ensure that the crane is stable and does not topple.
• The boom can move freely and can lift the load using an electric winch.

Please give me any suggestions for this design if you want.