I have a few drawings in Solidworks that the dimension lines have become detached. is there a way to re-attach these lines? from a edge to a centre line?
i know in solidedge i just hold down the alt key and i can attach it anywhere.
EdDanzer: Yes i forgot about the shoulder in the rod and didn't take into account for the reduced area on the chamfer on the piston.
do you use the threaded piston and nut method as well? is there a way you calculate the required torques?
EdDanzer: I have taken into account for the bearing stresses between the rod and piston. the contacting area keeping in mind the chamfer on the rod and piston is 2.480 in^2.
corypad: the >79,000lbs is the extend force created from the cylinder. 4.75" Barrel Bore and 2.00" Dia. Rod.
ok, thanks for the link i'll look into it.
CoryPad: My assumption was to torque the piston and nut seperatly to reduce the amount of stress in the threaded rod. Reducing both in tensional stress and shear stress in the threads, while increasing the clamping load in the piston.
i am using shigleys bolted joints equations.
in order for...
i am taking into account the shear stress in the threads and tesnile strain in the rod. we have had this joint come loose in the past and we have upped the torque.
the nut is a stover nut.
here are the specs:
Rod material yield = 100ksi
lubricated (k = .18)
operating pressure = 4500 psi
thread on rod = 1 3/8-12UN
Extend Force Created = 79,742 lbs
Retract force Created = 65,605 lbs
Torque required for the joint not to seperate is about 900 ft-lbs. this...
I'm working on figuring out a proper methond to calculate the torque for a threaded piston with a nut. this application has a high operating pressure.
I calculated the amount of torque that would be required for the nut without a threaded piston and the amount required for a joint that won't...
no there isn't anything between the bolt and flange.
yes this is a threaded plug. would i just use the normal T=KDP formula to dermtine the clamping force/tensile force?
i was wondering how i would determine a bolts clamping force, or the amount of tension in the threads when the bolt is screwed into a flange. there is no washer or nut. the bolt is directly screwed into the part.
desertfox: i want to determine a way to calculate a Torque that would be sufficient enough to create a frictional force in the threads and the collar to withstand the maximum axial pushing force created from pressure.
if i were to use this maximum pushing force as the load in the raising power...
ok thanks for your replies, i am going to use the power screw method since it makes sense. i'll use it to calculate the point where the joint is self locking then the required load to overcome the friction forces.
currently we don't have any locking mechanisms, we have before machined a few nothces on the gland shoulder and just punched part of the barrel into it.
