Our next job involves the restoration of a set of Harley Davidson Knuckle Head cylinder heads. I'am not a Harley expert but i do know that these heads and a knuckle head for that matter is extremley rare and valuable. The heads are in poor shape and will require some extensive machining to get them to a useable state but also they need to look like brand new. These heads have been repaired a few times in thier lifetime as there is spots of brazing in several spots. The heads have passed crack inspection. The next step is going to be to bake them at around 400 degrees the lead shot blast. This will cook off all the years of grime and gook that a solvent tank and a brush can't get too. The next step is too repair the threaded holes in the deck of the head. We will not be using helicoils. next will be a light machining to the deck of both heads. We will first need to build a fixture to hold on the head casting. Stay tuned this should be interesting.
Saturday, February 18, 2012
Thought I would show some more of the operations done to the superharger shaft assembly. The main shaft has a square machined on both ends to act as a key for the flange and the front hub. this eliminates using woodruf keys and square key stock that you would normally find in an application like this. This design is much less prone to crack and metal fatique goes way down being that there is no slots cut into high stress areas along the shaft. The degree wheel is mounted on the end of the shaft and a pointer is clamped to the table. You machine a flat to the desired depth every 90 degrees. If you read the degree wheel with a magnifier you can be extremly accurate. my index equipment was set up for making gears so i had to use a different method. There is always a few ways to attack jobs in a machine shop. The shaft assembly is finished now. the customer is installing it soon. I hope to get photos of the car to post here soon.
Friday, February 3, 2012
We started using 3-d design software about 3 years ago to help speed up the process of going from sketches and engineering to machine a little faster. I'am finnally starting to become effecient at it. This was a HUGE learning curve but it has started to pay off. Pencil and paper is no longer required. The drawing below is the assembly of the supercharger shaft. We now can generate a full set of blueprints from the parts sketches done in the computer and i know the assembly will work because I assembled it in the computer. The computer tells you when you have a dimension that won't line up. Technology sometimes works in my favor.