Questions tagged [springs]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
6
votes
2answers
6k views

How to calculate tensile strength of braided steel wire?

I am working on project involving designing a recoil spring coil of diameter 10.2 mm and wire diameter 1.25 mm. I tried using a solid core wire but it failed due inadequate tensile strength. ...
2
votes
0answers
120 views

Modifying coil spring to alter rate progressively

I want to modify the coil springs in my car to lower it 1" without raising the spring rate, so simply trimming the overall length is not an option. My idea is to remove material from along the top ...
9
votes
4answers
1k views

How does load force impact load inertia?

I am trying to simulate a winch as a speed-regulated motor that works through a gearbox to lift a mass. The output of the gearbox is a drum, which rotates to accumulate cable. I feel comfortable ...
2
votes
0answers
291 views

Designing a clamping mechanism for linear sliding stick

the problem I'm prototyping for a musical instrument based on sliding sticks (see https://vimeo.com/170450482) but I'm struggling to make a robust, yet smooth clamping mechanism for the sticks. The ...
1
vote
3answers
125 views

Material for suspension that stiffens in higher speeds?

I was hoping there exists a material like hard rubber used in bushings, but has the property to stiffen when exposed to vibration with high frequency. So, my application is something like a small ...
1
vote
0answers
279 views

“Click” mechanism

I have an application in which I need to detect a button press on top of a platform which has a load (0.2kg ~ 0.5kg). The press is executed on the load. Ideally I think what want is a tactile button ...
8
votes
8answers
6k views

Why aren't counterweights used more for garage doors?

One of my garage door torsion springs broke again. It makes me wonder why some sort of counterweight system isn't used instead. Torsion springs seem to have a 90 day warranty generally and are "...
0
votes
1answer
76 views

Wave torsion spring?

I'm building a catapult and I asked a question and got this response. Is there an equivalent for the wave spring but for angular motion like a torsion spring? Or any improved design on the torsion ...
2
votes
0answers
89 views

What type of spring is used in this antique receipt holder?

Pictured is an antique McCaskey Register Co Receipt Holder. I have tried to find a modern equivalent, but I have not had much luck. I am considering building my own, is the spring used a readily ...
2
votes
1answer
905 views

Would a double helix spring be more or less effective than two springs?

Say I have a spring in the shape of the backbone of DNA. If I unwind the two parts which would have more potential energy when pushed all the way down, the double helical or both of the individual ...
1
vote
0answers
59 views

Are there design reasons why there aren't pneumatic pistons for chairs with a stroke >= 400 mm?

In the interest of saving space, I'd like to have a stool that can double as a table. I'd like the height to be adjustable from 16 inches to 32 inches. But I can't find any pneumatic/spring piston ...
1
vote
0answers
490 views

Deriving relationship between LVDT and mass spring damper

I have this system below. It is the schematic of a linear accelerometer moving horizontally, where $m$ is the total mass of the slide, $b$ denotes the viscous damping, and $k$ represents the spring ...
1
vote
2answers
225 views

How do the springs really work in my design?

I'm designing a machine to test a static object (I'll refer to it as A)'s resistance to deflection due to impact force. This design uses a pneumatic(probably wont be using hydraulic) cylinder to ...
4
votes
1answer
67 views

How does non-electrical ATEX apply to springs?

This question relates to the ATEX directive, which is the European regulation governing the design of products to be used in explosive atmospheres. In particular, I am asking about the part relating ...
2
votes
4answers
425 views

What is the Technical Term for this kind of slot?

I am looking for the technical term which describes the kind of slot one finds commonly in modern phones to hold SIM cards. More specifically, what does one call a slot that one pushes the SIM card ...
5
votes
2answers
2k views

Metal spring thermal expansion

I am attempting to figure out why a laser layout tool I have is drifting over time. It was designed with a small adjustment mechanism that relies on a spring to apply pressure to a fulcrum that ...
3
votes
3answers
285 views

What is the [PVC] tube or foam in metal springs for?

There are plenty of springs out there which have either a little PVC tube or a foam inside, when I first saw the tube I thought it was probably to prevent the metal spring from bending, but that ...
3
votes
4answers
2k views

Rotary energy storage mechanism

With a normal spring, you compress it using a linear force to store energy and then it decompresses and releases the energy, again in a form of linear force. Is there a mechanical mechanism that ...
3
votes
2answers
284 views

Spring - Piston with different extension and compression rate

I am in need of a device that extends freely without much resistance but compresses slowly. I can provide a door closer analogy.The door should open fast but close slowly.... Do you think this can be ...
0
votes
2answers
782 views

What is the simplest spring system that could produce recoil absorption comparable to that exhibited by the AA-12 assault shotgun?

In this video, the video emphasises the very low recoil level of the AA-12 fully automatic shotgun. In particular, at this point in the video the presenter uses one hand to relatively lightly grip the ...
3
votes
2answers
96 views

Dominant parameters in the dynamical response of a linear oscillator

I am working with a very simple 3-DOF damped LTI spring-mass system. As an exercise I am altering two parameters simultaneously (stiffness and damping coefficients connecting mass 1 to mass 2) to see ...
3
votes
1answer
727 views

How much force does a lock's pin have due to the spring?

I found this gif, and I was wondering how much force is applied on the pin due to the spring from the top? Also, is there an industry standard for the amount of force exerted?
5
votes
1answer
4k views

How is the long-term creep of a spring determined?

Spring Design In spring design, there a a variety of parameters to consider. Some of the parameters are solely physical (wire diameter, coil diameter, length, etc.) and some are determined from the ...
4
votes
3answers
2k views

What kind of spring exerts a constant force but is also adjustable?

I'm trying to make a lifting mechanism that will support variable weights, similar to this product: http://www.humanscale.com/products/product.cfm?group=quickstand On the quickstand there is a screw ...
13
votes
1answer
653 views

What are the lightest springs?

I am wondering if there is a spring strong enough and light enough to inflate an airtight membrane so that it floats at Standard Temp & Pressure. As an example, a 10cm cylinder would displace ...

1
2