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I think thats the last thing hes worried about I mean how clean of a cut can you get with plasma. But he can make identical ones pretty quick.
The fit looked good but when you plasma cut stainless you get sugaring on the back side of the cut edge and can be a real PITA to clean up, but depending on how much clean up time takes with a carbide that is by far the quickest way to cut a lot of them.
Sorry for digging this thread up but it's helped me massively over the last few days, so much so i thought i'd sign up and share my design
with regards to the 95 degree angle some guys are cutting at, i cut at 90 and noticed that i was waaaay out, which was mainly due to my high merge angle (35 degrees) as the misalignment angle increases rapidly the further you move from parrelel. so i sat down and did some calcs and worked the correct angle i needed to rotate the pipe to get a 90 degree joining angle, i needed to see 110 degrees on the gauge for a square fitting
if anyone needs this simple spreadsheet i knocked up then let me know
Is the T3 flange the same as the a T25 flange with the rectangle collector? Also do you just rotate 94 degrees on the first pipe or is it the second cut on every pipe?
This thread help me a lot building my collector for my project. I've decided to post some of my tips that helped me. The process I've used is NOT for production. I only made this one and am doing this as a hobby. Thought I'll share the entire process. Here it goes:
I started using 80 grit sand paper on a lathe to produce a satin finish.
Then I cut everything to length (I used 3 inches) and bevel the edge
Then used the lathe to bore the inside (I guess for those who do not have a lathe can make an attachment for a drill to spin the pipe and use sandpaper to produce the same results)
Finished product before cutting
So here is my jig. Its something I did not spend a lot of time on making. It works okay for what it is. If you want to do production, I would advise you to spend a fair amount of time and money on building a good jig.
It is just a flat piece of plate, with a piece of square tubing and angle iron. And two bolts.
Specs: Cutting angle = 20Deg & Rotation for second cut = 97Deg
So here is my tip. You do not have to cut all four pipes in order to see if you rotated it correctly. After the first pipe you can test it already. Place it on a flat surface and measure it with a square. If there is a gap on the top you have rotated it too much. And if there is a gap at the bottom you did not turn it enough for the second cut. Here you can see a slight gap at the bottom
It is not the end of the world in your a little over or under. If your a little under you can cut the second pipe little over and still produce one that fits together.
Okay so i just made my first attempt on my practice collector. The first issue i ran into is that i was not rotating the pipe enough. I just used a level to check if i rotated enough. Finally got it by the third one.
My next issue is that for some reason my fitup is not quite the right length. I've cut every pipe at the same length and spot on the jig. I'm attempting the t3/t25 flange with the rectangle opening. I cut the first cut on 2 at 15° and the second cut on 16° and vise versa. Below you can see my issue. Anyone know what I'm doing wrong?
you need to index the cut depth from the butt of the pipe. I see you have it marked on the jig how far back to put it.
If you are cutting the same size pipe at the same angle, you can weld a piece of 1/16" metal on the back to create a hard stop that you will butt the collector pipe to every time to keep it consistent. that's the advantage of my collector jig. its the same every time for cut depth. I just need to get my rotation in as its the only variable.
I've been a "lurker" here for a while. First off awesome forum I love the fab areas and have learned a bit. I apologize in advance for the crappy cell phone pics in a dim garage. I looked at several designs on here and came up with this. I plan to adapt it to a cold saw later. I have so many pics in case anyone wants to copy it. Sorry I don't feel like copying the image links one at a time to get them in the right order...
Last edited by entropyeng; 12-30-2014 at 08:41 PM.
check out my buddies shop here on Facebook. he is machining collector jigs that he will start selling after he finishes a large round of them. should make the process of cutting for collectors damn near idiot proof
11-05-2013, 09:15 AM
Re: Post pictures of your collector jigs.
