Runner
Well-Known Member
- Joined
- Feb 10, 2011
- Messages
- 124
- Reaction score
- 17
Hi all,
I am dismayed by how soft copper based materials are after silver soldering and therefore easily damaged. My latest problem is the manufacture of an axle driven pump for a locomotive that required two gun metal cylinders silver soldered together to produce a T shaped form one for the ball valves, the other for the pump. The pump is fixed to the cross member by cutting a thread 9/16" x 26 TPI on the pump cylinder, one to enable a lock nut to lock it to the cross member and two to facilitate a sealing nut. In attempting to cut the thread I had to clamp the cylinder in a vise, which because of the softness of the material went slightly oval, therefore the plunger which was a good sliding fit wouldn't operate in the bore. I am now getting to the point of my enquiry. How can the assembly be hardened after silver soldering so that subsequent work doesn't damaged the assembly.
Does leaving the assembly alone work harden it after time?
Thanks in advance
Brian
I am dismayed by how soft copper based materials are after silver soldering and therefore easily damaged. My latest problem is the manufacture of an axle driven pump for a locomotive that required two gun metal cylinders silver soldered together to produce a T shaped form one for the ball valves, the other for the pump. The pump is fixed to the cross member by cutting a thread 9/16" x 26 TPI on the pump cylinder, one to enable a lock nut to lock it to the cross member and two to facilitate a sealing nut. In attempting to cut the thread I had to clamp the cylinder in a vise, which because of the softness of the material went slightly oval, therefore the plunger which was a good sliding fit wouldn't operate in the bore. I am now getting to the point of my enquiry. How can the assembly be hardened after silver soldering so that subsequent work doesn't damaged the assembly.
Does leaving the assembly alone work harden it after time?
Thanks in advance
Brian