Doug W
Hot Rolled
- Joined
- Sep 22, 2003
- Location
- Pacific NW
I have a large 7" bore, welded body hydraulic cylinder with a long stroke that I want to make into 2 shorter stroke cylinders.
Doing so all that I would have to make is a end cap, gland nut, nut and piston and I have the existing ones to copy.
I have experience shortening cylinders, welding end caps etc,, not redesigning them.
The questions.
1. Does anyone know how to calculate the allowable pressure with the given wall thickness AND changing from a rear cap end clevis to a rod end flange mount?
I believe that change would add an axial load to the cylinder walls and end cap.
The cylinder has no manufacturer markings, rating, etc.
Upon disassembly the hydraulic parts supplier can give me an idea what the existing seals were rated for.
2. The flange would be a thick plate with a hole, slid over the cylinder tube and welded in place.
Is this done before the cylinder's internal thread is cut?
Does the weld shrinkage require honing afterward? Or is there some way to offset the shrinkage by for example having the plate hole oversize?
Answers to these specific questions will be much appreciated, tangents and diversions not so much.
Thanks!
Doing so all that I would have to make is a end cap, gland nut, nut and piston and I have the existing ones to copy.
I have experience shortening cylinders, welding end caps etc,, not redesigning them.
The questions.
1. Does anyone know how to calculate the allowable pressure with the given wall thickness AND changing from a rear cap end clevis to a rod end flange mount?
I believe that change would add an axial load to the cylinder walls and end cap.
The cylinder has no manufacturer markings, rating, etc.
Upon disassembly the hydraulic parts supplier can give me an idea what the existing seals were rated for.
2. The flange would be a thick plate with a hole, slid over the cylinder tube and welded in place.
Is this done before the cylinder's internal thread is cut?
Does the weld shrinkage require honing afterward? Or is there some way to offset the shrinkage by for example having the plate hole oversize?
Answers to these specific questions will be much appreciated, tangents and diversions not so much.
Thanks!