Here is the new Video clip that Mike wanted to show a small, but necessary operation. During the build of the prototype we learned just how essential this simple, mundane operation was. It MUST BE Accomplished BEFORE the heating of the Trunnion Ring or extreme difficulties will arise! Here is what happened: Just as Mike's oven had soaked the Trunnion Ring for two hours at 500 F., the oven cleaning setting, we swung the 12" Kant-Twist Clamp into position to grab it, only to find out that we had not done our due diligence on the size of the Trunnion Ring's width and the clamping capacity of our biggest clamp. My BAD or Mike's BAD, I can't remember, but it was a PITA!! It is about 8 seconds to the shop from Mike's kitchen if you hustle. How good were those new silicone oven mitts??
Mike volunteered, so I got out of the way! I yelled when I had the Core Tube in the fixture pointed straight up to receive the very hot Ring. He hustled and got it out to the shop Toute-suite! I made darn sure that it slid down the Core Tube right side up!!!
He reduced the dia. of the Core Tube's breech end by .015" with a nice 30 degree chamfer instead of a sharp edge. No hang-up occurred! We both learned that silicone is a terrific insulator...........very effective.
Now, back to a more organized approach to the handling problem. We decided that the dropping of the rings was a critical op, so a few minutes prep was justified on each of the larger Trunnion Rings. The video clip will show what our formal fix was. Mike tap drills the left and right Trunnion pads on each large Trunnion Ring for an 8" long piece of 3/8-16 all-thread which we use to retrieve the ring from the oven. This works very well as it allows us to see the alignment between the ring and the Core Tube's breech end for a smooth, no-hastle fit and slide down to the Clinching Position.
First, your attention is directed to the sentence in RED above. As you look at the photo below, which shows the 3/8-16 threaded hole in process as displayed in the video, you will probably notice that we DID NOT place the Trunnion Rings which had these thd. holes finished with the correct alignment, or large radius facing the Core Tube end closest to you as they sit in the floor mounted holding rack. Think of this arrangement as merely a place to hang your hat. As long as we have the Trunnion Ring on the correct Core Tube per the diameters for correct shrink fitting, we are doing quite well enough, thank you very much! Finally, we have not put the Silicone Kitchen Mitts away just yet. They are needed to handle the 500 degree, 3/8-16, all thread pieces, sticking out of the Trunnion Rings which we must swiftly transport to the shop!
Note the short 3/8-16 bolts that I placed in the threads just created by Mike in the Trunnion Rings. The oven handles will be 8" lengths of all-thread which will be easier to use while lowering the rings onto the breech end of the Core Tube during the Heat Shrinking process.
Tracy and Mike