pneumatic piston speed?
pneumatic piston speed?
(OP)
Hi guys,
If I have a Piston cylinder with a diameter of 20 mm, a stroke of 125 mm and an operating pressure of 4 bars and I need to estimate the velocity of the piston but I don't know the time,(like to calculate it from this formula F=P*A and V=a*t)so could any one please helps me .Thanks
If I have a Piston cylinder with a diameter of 20 mm, a stroke of 125 mm and an operating pressure of 4 bars and I need to estimate the velocity of the piston but I don't know the time,(like to calculate it from this formula F=P*A and V=a*t)so could any one please helps me .Thanks





RE: pneumatic piston speed?
"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek
RE: pneumatic piston speed?
You know F. a = F/m
Use kinematic equations to relate stroke travel, acceleration, velocity and time. Take the case of constant acceleration, for example. And assume air flow is sufficient to maintain pressure P. s = 1/2 * a * t^2 v = a * t
Ted
RE: pneumatic piston speed?
Try the manufacturer if it is an off the shelf part. I've run across at least one air cylinder manufacturer (Tolomatic) that has documentation on calculating piston velocity available.
RE: pneumatic piston speed?
Why to assume air flow is sufficient to maintain pressure? The pressure inside the piston can (needs to) be calculated with the movement of the piston by simulating the flow inside the piston too.
RE: pneumatic piston speed?
"People will work for you with blood and sweat and tears if they work for what they believe in......" - Simon Sinek
RE: pneumatic piston speed?
Ted
RE: pneumatic piston speed?
You are correct that this is the top speed case but DiaaHamdy need to practically estimate/calculate the actual speed not the maximum theoretical speed. I have seen robot arms speed much lower than expected because the designer failed to involve the actual flow rate into the cylinder as the result of the tubes inner diameter, valve orifices, cylinder inside volume and gas properties.
RE: pneumatic piston speed?
Ted