Peter Colman
Stainless
- Joined
- Sep 22, 2004
- Location
- Rugeley UK
I have to broach a 10 mm keyway in a 32 mm hole in a mild steel component 60 mm thick. I made a bush for the broach that was a nice sliding fit on the body of the broach and a close push fit in the hole, the flange on the end of the bush was 10 mm thick and it finished flush with the the underside of the part ie it was 60 mm under the head.
The bush was made so the broach would pass about one third of the way through the hole before it started to cut.
I have a well made broaching press with a geared ram and three support pillars, so the pressure is exerted perpendicular to the workpiece.
I set the job up on the base of the press and stared to broach the hole, the broach dug into the work and pulled into the keyway so getting out of line.
I turned everything over and the problem was the same when working from the other side.
How do I stop this happening?
Thanks
Peter
The bush was made so the broach would pass about one third of the way through the hole before it started to cut.
I have a well made broaching press with a geared ram and three support pillars, so the pressure is exerted perpendicular to the workpiece.
I set the job up on the base of the press and stared to broach the hole, the broach dug into the work and pulled into the keyway so getting out of line.
I turned everything over and the problem was the same when working from the other side.
How do I stop this happening?
Thanks
Peter