Questions tagged [springs]
The springs tag has no usage guidance.
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Choosing a Constant Force Spring
I am trying to decide on a constant force spring to be used in a projectile launcher. The launch velocity will need to be approximately 15 m/s, which, with a barrel travel distance of 1 ft, equates to ...
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Questions about newton metre units
I have a few values in Newton metres and I need to make sure each value is an SI unit for calculations. However when I try to search for the units I am given, I can only find similar, but not quite ...
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What's the name of a device to simulate an object jumping in the air?
I want to make a film of a puppet jumping in the air into the water of a lagoon. I am looking for a pad with a spring release timer that I can bury in the sand so it's out of sight from the camera, ...
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Calculate forces/ torques on a parallel spring array
I am stuck on the calculation of forces on a certain system involving parallel springs.
The schematic of the system is as follows:
The lower plane is fixed and the upper plane movable. There is a ...
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Are recoil operated crossbows/ballistae feasible?
This question is specifically about stationary or vehicle mounted crossbows, not man-portable ones
The projectile size would measure about 1.8 - 2 meters in length, so the crossbow would have ...
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Launching a ball with springs or with elastic bands
I’m a student and have to create a machine that can launch a small bowling ball to knock over some pins.
I was thinking that I could use elastic potential energy to launch the ball but I’m not sure ...
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How do I correctly model this system of torsion springs?
I am currently designing a symmetric parallel mechanism that can be modeled as follows:
Here, $\tau^j$ denotes actuator moments and $k_i$ are torsion springs constants. For a specific point in the ...
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Help with linear rod drill press like design/materials
I am putting together a basic machine for “pad printing” extremely small and precise parts. The design is very much the same as most homemade drill presses and consists of linear rods, flanged ...
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Overextending and cutting a coil spring
This is related to my recent question
Can I weaken a coil spring consisting of spring steel?. The answer here could create an additional answer there, but I do not expect that. The difference to that ...
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Can I weaken a coil spring consisting of spring steel?
I have a steel coil spring that is used by compression. It is too strong, and I would like to reduce its strength by some fraction, ideally keeping its length.
Reducing it to roughly half would be ...
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Is the Spring Rate for a Belleville Spring Linear?
Belleville disc springs are usually spec'd with a free height, loaded height, and loaded force. From this information you can calculate the average spring rate of a belleville spring. However, what ...
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Arc subtended by stretching of a conical spiral spring
I'm trying to work out the angle subtended by the stretching of a conical spring and I have a solution but I'm not 100% sure about it so would appreciate some feedback.
An Archimedes spiral spring is ...
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Spring Loaded Pin with Chamfered Pin Finish?
I would like to try out a component that operates like a combination of the two pictures provided - spring loaded pull pin, with a pin finish like a tubular latch (chamfered/filleted finish).
Do ...
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Is an Adjustable Stiffness Flexure Spring possible?
I have recently discovered flexure springs (see image below), and I am interested in using one in an amateur project I am building.
However, I would prefer if I am able to adjust the "stiffness" of ...
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Springs on a pulley... When to use?
I saw a machine that fed a sheet of laminate through some rollers. The motor had a pulley attached to its shaft, and a spring connected to the pulley. Why not use a belt? Wouldnt the spring make it ...
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