Questions tagged [springs]
The springs tag has no usage guidance.
19
questions with no upvoted or accepted answers
4
votes
0answers
63 views
Equation for the spring constant of an orthotropic, rectangular wire spring
I hope I can get some help with this problem as I've been struggling with it for a long time. I have a helical tension spring with radius $R$ and a square wire cross section and made of orthotropic ...
3
votes
1answer
64 views
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 ...
2
votes
0answers
19 views
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 ...
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 ...
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 ...
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 ...
1
vote
0answers
35 views
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 ...
1
vote
0answers
52 views
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 ...
1
vote
0answers
27 views
A creep mathematical model of alloy steel for making springs
I'm searching for a mathematical approach to well describe the creep （or stress relaxation）of helical-coil compression spring.I've got the spring parts and can Experiment with these parts .I need ...
1
vote
0answers
108 views
Equations of motion for a motor supported by a spring resting at the centre of a beam
Assumptions from this:
Sum of forces on the beam to be calculated
Sum of moments on the beam to be calculated
Sum of forces on the motor to be calculated
As:
F=-kx = kθL^2
Equations of Motion
...
1
vote
0answers
41 views
What are typical manufacturing constraints when producing (conical) springs?
Small background: for a project of mine I need to develop a (very light) conical spring.
While there are plenty resources out there for regular springs I really struggled to find anything on conical ...
1
vote
0answers
62 views
Why don't we make mainsprings out of Kevlar?
The most important factor for mainspring is, as far as I understand the matter, is their yield point.
In this regard, Kevlar beats steel by at least factor of two. So why aren't we using it instead ...
1
vote
0answers
2k views
Equivalent spring of beam supported by springs
My professor gave us yesterday a problem to calculate the equivalent spring of the system shown in the attached figure. The problem: a cantilever beam supported by two springs $k_1$ and $k_2$ located ...
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 ...
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 ...
0
votes
0answers
17 views
Why aren't elastomer suspensions still used on economy cars?
Classic Mini Coopers used a hollow rubber cone as a combination spring and damper in a pushrod suspension. Why aren't simple elastomer springs still used in cheaper cars? Formula 500 cars use an even ...
0
votes
1answer
54 views
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 ...
-1
votes
1answer
164 views
Spring Diameter Question
Aluminum 6061-T6 has a density of 2.7 g/cm^3, a Young's modulus
of 69 GPa, and an ultimate tensile strength of 310 MPa.
If a "spring" were to be made by pulling a 10cm long cylinder of
material in ...
