Tuesday, June 23, 2009

Mounting the bicycle freewheel on the grinder

In order to attach the chain and cranks to the drive shaft of the grinder I had to machine a piece of metal that fit on to the drive shaft and threaded to a bicycle freewheel gear set. Using the Evergreen Machine Shop and the help of a fellow student and machining genius, Jimmy, I machined a piece of steel rod to fit on to the drive shaft and lock on with a key. This process involved using various tools, some of which I would like to highlight below.

Here is my ode to the dial calipers. This instrument is for measuring and it is more precise than I ever thought I would need. However, when machining parts, precision is like popeye's canned spinach.
This is a lathe. This machine really opened my eyes to the possibilities of machining. It also made me realize how extremely dangerous it is. Luckily, Jimmy was there to make sure I didn't mangle myself.
Here is a picture of the lathe taking a cut while I was machining the threads.

Here is what the grinder looks like with the gears mounted on the drive shaft.

Thursday, June 4, 2009

The Frame

Here are some pictures of the frame. It is about 90% complete!

The Grinder finally arrived!!

TA DAAAA Here she is, the Omega VI grinder from Compatible Technology International. Now that the grinder is here I can estimate the width of the machine and make all the final welds!!!


We are in the final week of the Spring quarter here at Evergreen and I'm scrambling to finish the frame of the machine The following pictures show the Metal Shop, Welding, and some tools I have been using to build it.

This is the TIG (Tungston Inert Gas) torch. It holds the Tungston steel that acts as the electrode.

Here is a mill that I used to mill a track for the seat mount.

Here is a picture of me welding on the seat mount to the frame. (above and below)
Here is a picture of a pipe clamp. This little fella has been worth it's weight in gold. I've been cutting all of the tubes with a hack saw and coping them with files while holding the tubes with this clamp. Everybody constantly tells me that I could do it faster using a grinding wheel, but I enjoy the precision and the work out of doing it with my arms. Believe that.
This is a picture of the sand blaster. Those circular holes in the machine are where your hands stick in. It always reminds me of the beginning of the Simpsons where Homer is holding the plutonium.