05-22-2015, 10:49 PM
A little more progress this afternoon, night shift tonight so I had to pick a job that I could get done between sleeping in and going to work.
Colin describes a geometric method called 'parallel line development' for marking out the cut shape of the inlet port tube. I haven't come across this before, it was kind of fun and the result was a very nicely fitted 3" pipe that intersects the 10" furnace bore at the perimeter.
Marking out the pattern:
The pattern is then cut out and wrapped around the pipe
a line is traced onto the pipe around the edge of the pattern, about 90 seconds work with the 5" angle grinder and the result is a very nice fit
The 3" pipe will stay in place in the furnace, forming a port for the 2 1/2" inlet tube.
I decided to do this job before cutting the hole that I was marking out the other night, as my inlet pipe is larger than the author's design (he recommends the increased size) and I've found it will require moving the inlet hole opening around the corner about 20 degrees or so to avoid conflict with the lid lifting arrangement. I got the opening marked out on the outer skin ready to cut out when I get back to it.
I may be a little distracted in getting back to this after my night shifts, as I have a new toy to bring home...
Colin describes a geometric method called 'parallel line development' for marking out the cut shape of the inlet port tube. I haven't come across this before, it was kind of fun and the result was a very nicely fitted 3" pipe that intersects the 10" furnace bore at the perimeter.
Marking out the pattern:
The pattern is then cut out and wrapped around the pipe
a line is traced onto the pipe around the edge of the pattern, about 90 seconds work with the 5" angle grinder and the result is a very nice fit
The 3" pipe will stay in place in the furnace, forming a port for the 2 1/2" inlet tube.
I decided to do this job before cutting the hole that I was marking out the other night, as my inlet pipe is larger than the author's design (he recommends the increased size) and I've found it will require moving the inlet hole opening around the corner about 20 degrees or so to avoid conflict with the lid lifting arrangement. I got the opening marked out on the outer skin ready to cut out when I get back to it.
I may be a little distracted in getting back to this after my night shifts, as I have a new toy to bring home...
Lathe (n); a machine tool used in the production of milling machine components.
Milling Machine (n); a machine tool used in the production of lathe components.
Milling Machine (n); a machine tool used in the production of lathe components.