subsearobot
Mechanical
- Jan 19, 2007
- 217
Hello all!
I need a pushrod fabricated at a decent volume, looking for advice on methods to look into.
How to permanently join two pieces, each about 3" long.
It's a pushrod, though it intermittently rotates, so we do not want risk of self-disassembly. it needs to be a permanent joint.
Will need about 100,000/ year.
A: 3/32" hex, 316 stainless or possibly 17-4 hardened
B: ~.100" round stock, aluminum, threads machined at one end
Runout ~.001" (002" or maybe even 003" if there's a large cost demarcation there)
Straightness better than .005" over the entire length if possible
Must withstand autoclaving, so no Loctite
It is not a candidate for Swiss machining from one piece (of stainless)
Consultant wants threads and Loctite (see previous about autoclave and loctite). Their vendor does not want to do an interference fit because of our straightness needs.
Can the joint be crimped or swaged?
Distorted threads and a countersink for alignment? (it's still threads, so I don’t like it.)
How would you make this?
Thanks!
I need a pushrod fabricated at a decent volume, looking for advice on methods to look into.
How to permanently join two pieces, each about 3" long.
It's a pushrod, though it intermittently rotates, so we do not want risk of self-disassembly. it needs to be a permanent joint.
Will need about 100,000/ year.
A: 3/32" hex, 316 stainless or possibly 17-4 hardened
B: ~.100" round stock, aluminum, threads machined at one end
Runout ~.001" (002" or maybe even 003" if there's a large cost demarcation there)
Straightness better than .005" over the entire length if possible
Must withstand autoclaving, so no Loctite
It is not a candidate for Swiss machining from one piece (of stainless)
Consultant wants threads and Loctite (see previous about autoclave and loctite). Their vendor does not want to do an interference fit because of our straightness needs.
Can the joint be crimped or swaged?
Distorted threads and a countersink for alignment? (it's still threads, so I don’t like it.)
How would you make this?
Thanks!