Our Fall 2015 Sine Plate Project

[protoserge]

This is my kind of project! It looks like it's coming together. Do you have any plans to heat treat for stress relief?

[ParisDakar]

Originally Posted by protoserge

This is my kind of project! It looks like it's coming together. Do you have any plans to heat treat for stress relief?

I wanted to make this project mostly a design and machining exercise. And an inexpensive one as well. So no heat treating. We're using 1018 cold rolled steel, not much you can do with that other than case harden it a little.

I haven't measured the surfaces for flatness yet, it's on my list. We only took about .015" off each side, so I don't know how much effect that would have on 1" thick plate as far as releasing stresses.

[ParisDakar]

Getting close to finishing the project and not a moment too soon. Top and bottom plates have the hinge grooves cut. The gage block area is milled out. The bottom plate holes match the T slots in the mill table.

http://wiki.team1640.com/index.php?t...Bolt_plate.jpg

http://wiki.team1640.com/index.php?t...oth_plates.jpg

[ParisDakar]

Cut the gage block rest. Drilled the hole pattern on the top plate. Left 1" spacing between the 5/16-18 bolts that the holes will be threaded for (20 holes to tap). Need to cut the hinge parts on the lathe, then drill the holes to put it all together.

http://wiki.team1640.com/index.php?t...ar_finish2.jpg

http://wiki.team1640.com/index.php?t...ar_finish1.jpg

[protoserge]

Love it. Now use it to test the possible shooter angles for this year's game down to the thousandth of a degree