TIG Braze Mild steel different Thickness
Posted: Fri Oct 28, 2016 6:09 pm
Hello,
I am hoping someone could give me some pointers on this. First off I am building a CNC mill, nothing too fancy 30X20 cut area. Moving gantry etc. I mainly want it for cutting .5 and less aluminum plate to make parts to weld. I have finished the base all .25' wall steel tubing fit and welded with 70ES2, no problems. Now I am working on the gantry, pretty much the sam as the Base all .25' wall tube except the part for the Y axis BallScrew, because of the dimensions of the ball screw in relation to the Linear slides I am having to build up the Stepper mount and Ballscrew on a piece of .12 wall 3X1 tubing. In order to align the Motor shaft and the Ballscrew I have to put a 14mm spacer under the Ball screw bearing blocks at each end of the screw.
I had to do the same thing on the X axis (the base) but I welded the spacer which measure 2.5"X1.5"X14mm (yeah it has been fun going back and forth between metric) to the .25 wall tube, I didn't have any warp issues doing that.
But when I tried welding the same space tot eh .12" wall tube it warped! about 1/4 for 8' of run. I am TIG welding everything this joint I had welded at 180 amps, 3/33 70S2 filler concentrating the arc mostly on the 14mm block but getting enough wetting to dip filler on the .12 tube.
Obviously this didn't work so well.
So now I am wondering if I TIG brazed the spacer/block to the .12 wall tube (all new metal) I wouldn't have the warp issue?
What should my settings be? I did a test run on the old piece 100 amps tight arc and some 1/8 SIB ( 1/8 is all I had on hand). it seemed to turn out OK but I was welding to a warped piece of metal so I could really tell if I had new distortion after welding.
are my settings correct?
TNX
Sorry I have taken any photos
I am hoping someone could give me some pointers on this. First off I am building a CNC mill, nothing too fancy 30X20 cut area. Moving gantry etc. I mainly want it for cutting .5 and less aluminum plate to make parts to weld. I have finished the base all .25' wall steel tubing fit and welded with 70ES2, no problems. Now I am working on the gantry, pretty much the sam as the Base all .25' wall tube except the part for the Y axis BallScrew, because of the dimensions of the ball screw in relation to the Linear slides I am having to build up the Stepper mount and Ballscrew on a piece of .12 wall 3X1 tubing. In order to align the Motor shaft and the Ballscrew I have to put a 14mm spacer under the Ball screw bearing blocks at each end of the screw.
I had to do the same thing on the X axis (the base) but I welded the spacer which measure 2.5"X1.5"X14mm (yeah it has been fun going back and forth between metric) to the .25 wall tube, I didn't have any warp issues doing that.
But when I tried welding the same space tot eh .12" wall tube it warped! about 1/4 for 8' of run. I am TIG welding everything this joint I had welded at 180 amps, 3/33 70S2 filler concentrating the arc mostly on the 14mm block but getting enough wetting to dip filler on the .12 tube.
Obviously this didn't work so well.
So now I am wondering if I TIG brazed the spacer/block to the .12 wall tube (all new metal) I wouldn't have the warp issue?
What should my settings be? I did a test run on the old piece 100 amps tight arc and some 1/8 SIB ( 1/8 is all I had on hand). it seemed to turn out OK but I was welding to a warped piece of metal so I could really tell if I had new distortion after welding.
are my settings correct?
TNX
Sorry I have taken any photos