Questions tagged [mechanical]
The mechanical tag has no usage guidance.
79
questions with no upvoted or accepted answers
5
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answer
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Quick return mechanism for spring-loaded screw
I am looking for a way to convert rotary motion to linear, but it should take less energy to get back to initial position than when going from initial position to the end position.
Specifically, a ...
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4
votes
0
answers
258
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How is motor torque related to capstan equation?
I know that capstan equation relates $T_{in}$ and $T_{out}$ as $T_{out} = T_{in}e^{u \cdot F_c}$, where $u$ is friction coefficient and $F_c$ is wrap (slip) angle. In my situation, the capstan is ...
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2
votes
0
answers
42
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High articulation joints
Looking for advice or suggestions for high articulation joints (>57°) for an automotive halfshaft. Peak operating conditions are in the ballpark of ~1000RPM, ~300ft-lb torque.
I've considered u-...
- 121
2
votes
0
answers
35
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Is inverse hall-petch relation valid crystals larger than nanocrystalline?
The image shown here is of ceramics, where they varied the grain size and measured the strength. For example, let's take Al2O3. There we observed that strength first increased from 3 μm to 95 μm. But ...
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2
votes
1
answer
491
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How to calculate torque requirement for vehicle with Mecanum wheels?
What changes are specific to mecanum wheels when calculating torque requirements for a vehicle? I have the vehicle's mass, top speed and acceleration data.
2
votes
0
answers
44
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Epoxy/Adhesive to bond solid wood and acrylic
I am trying to bond solid wood with with clear acrylic, with requirement to able to withstand shearing force, not more than 6kg over an area of 100 sq.cm.
Have tried to bond with result of the ...
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1
vote
0
answers
24
views
How to estimate the rounding toque of an allen key socket?
I can't find an example calculation for the maximum torque of an allen key socket (the female bit on the screw head that the allen key goes into) anywhere online, or in textbooks, can someone point me ...
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1
vote
0
answers
27
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Single millinewton strain gauge suggestions
I am working on a project where the precise & accurate measurement of single millinewton forces has become a significant boundary. Is there a cost effective device that is able to measure such ...
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1
vote
0
answers
34
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Cryogenic pump - why is this part slotted?
What is the purpose of that slotted area?
In my opinion it is done that way in order to prevent it (the impeller) from sticking to the pump body in case it is not properly cooled down.
Some people say ...
1
vote
1
answer
115
views
how to interpret ISO2768-mK angular tolerance
How to apply tolerance for angle based on ISO-2768-mK? Cause I am confused about the statement "Permissible deviations in degrees and minutes for ranges in nominal lengths". Lets say I have ...
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1
vote
0
answers
32
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Can anyone suggest an Economical way for Polishing wound Wires?
I am working as a mechanical design engineer. At my work place, we were making chairs with 12 mm diameter wire via bending. We were using mild steel flash wires which was like the perfect wire with ...
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1
vote
1
answer
106
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Stepper motor response under varying load
I had a thought that came to mind that made me curious-- Though unfortunately I am not an ME.
I was wondering if someone could assist me in working through my thinking, but you will have to be gentle ...
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1
vote
2
answers
170
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How to align a shaft with gear box and mechanical seal and uc bearing?
I have a 15 inch (381 mm) shaft with 24.95 mm diameter. That shaft is attached with a gearbox (ratio 5:1). The gearbox is driven by a motor (rpm 2750). There is one UC bearing and mechanical seal and ...
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1
vote
0
answers
73
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Compound Machine with Worm and Worm Wheel Drive Velocity Ratio
I'm having trouble understanding the working principle behind solving this worm drive. Here's the question:
A double threaded worm and 40-tooth worm wheel are used to drive a mechanical winch. The ...
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1
vote
0
answers
123
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Design a Jig and Fixture for 3-axis CNC Milling Machine
Newbie Here!!!
This is my assignment task. I am required to design a Jig and Fixture for 3-axis CNC Milling Machine. The workpiece will be a simple aluminium block and it will be cut and shaped into a ...
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