Questions tagged [design]
The design tag has no usage guidance.
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Design an underground pump house (dry well) with column in the middle of wall [on hold]
I need to design an underground pump house with Internal dimensions: Length 6.25 m, Width 5.8 m, Depth 4.7 m, soil bearing capacity is 100. I want to have column in the middle of walls to increase ...
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0answers
17 views
Deflection of a statically indeterminate beam fixed at both ends and constraint in between and Castigliano's theorem
How to solve for deflection at the middle using castigliano's theorem?
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1answer
44 views
Regarding design of fixation of a part
I would like to know if there is any theory behind designing the fixation for any part. To optimise the number of mounting holes and fasteners.
If so what is it called and where can I get it?
Please ...
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0answers
28 views
Screw Cap design for high pressure surge vessel
I'm designing a pressure vessel with a relatively large cap that provides access into the vessel, what recommended thread specifications is needed to maximized locking and safety against faliure or ...
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1answer
26 views
How to model a driven wheel with no slip
I'm working on a design problem, and I'm having trouble figuring out how to model the torque needed to drive a bike tire at a set acceleration.
Let's say I have a tire with normal force between tire ...
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0answers
28 views
Designing a submersible cooling system for rapid flow hot nitrogen gas [duplicate]
I'm trying to design a cooling system for cooling nitrogen at 300°C. My original design (which is very open to modifications) is an aluminum ring block with exterior fins and vertical holes through ...
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3answers
97 views
How are dangerous to build things studied?
How are dangerous to build things studied?
Such as, nuclear reactors, jet engines, sawing machines.
How do engineers discover, how they ought to be built, while avoiding getting or getting others ...
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1answer
30 views
Designing cylindrical cam
So I need to design a cylindrical cam (aka barrel cam I think). I'm an aerospace engineer so I've never had a course on cams/gear design (wish I had though). Is there a general equation for the curve (...
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1answer
32 views
How to get precision with a small gear?
I want to be able to precisely rotate a item. For this I have positioned the item on top of a very large gear. It is driven by a smaller gear. When the item is in the correct position, I will lock the ...
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1answer
31 views
Issues creating a high pressure chamber for corrosive solution
I'm trying to do an experiment on high pressure's effect on the electrical impedance of a really corrosive solution. I'm aiming for at least 2,000 psi with a pressure chamber but the only material I ...
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3answers
58 views
Cheap low-temperature oven
I'd like to make an oven for curing adhesives that require an elevated temperature for a proper cure. I'd like for the temperature to be settable from 60 degrees C to 75 C plus or minus 5 degrees over ...
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1answer
74 views
Could a spinning permanent magnet's interaction with the Earth's magnetic field propel a boat through the water?
I am wondering if a spinning permanent magnet's interaction with the Earth's magnetic field will produce a propelling force strong enough to propel a toy boat through the water. This propelling force ...
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2answers
71 views
Racing cars have spring with constant rate whereas Off road vehicles have variable spring rate [closed]
In the term of machine design and mechanical engineering.
If same spring is to be used in both smooth and rough road what will be the effect in suspension of the vehicle and if instead of using same ...
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0answers
39 views
Why do transport containers for wafers open clockwise?
In the semiconductor industry and research, silicon wafers are transported in round plastic sample containers with a screw lid.
Other than any other screw top though, the lid always opens (releases) ...
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0answers
46 views
Question about how to couple round servo shaft to flat shaft
I'm looking to control a commercial deadbolt using a small servo, motor, or gear motor. The deadbolt has a common Schlage cylinder such as this one that has a flat shaft that runs through a slotted ...
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0answers
29 views
Designing a piston pump for windpump
I am designing a savonius type wind pump for low wind speeds(avg speed = 2.7 m/s), with these speeds and rotor area of about 2 m2. Acc. to my calculations, I am getting a volume flow rate of ...
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2answers
26 views
Connector for sliding plate to rotating rod
I want to couple a plate, which cannot rotate but only slide along a track, with a threaded rotating shaft. This is for a grip setup, where rotating the rod presses the plate forwards to apply ...
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0answers
29 views
Force exerted on the CPU socket by heatsink
I am currently designing a replacement bracket for AM4 CPU coolers that will be compatible with different cooler models and allow them to be installed facing different directions, as AM4 socket is non-...
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0answers
30 views
what is the chance of sustaining load if beam is 20 feet long? [closed]
what is the chance of sustaining load if beam is 20 feet long as center pillar of house is removed in first floor and added 20 feet long beam with 20 mm rods in RCC beam?
House details :: 30*40 sq ...
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0answers
26 views
Tolerancing considerations for temperature rated mechanical assemblies
I am currently designing a mechanical tensile testing setup to operate at different temperatures (-20 to 100 C) in a wet environment. I plan on machining two sets, one from stainless and one from PMMA....
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3answers
69 views
Why is the rear wheel of the Penny-farthing so small?
I see a lot of people asking why the Penny-farthing's front wheel is so big, and I think I've read enough materials to understand why (at least, at the most basic level). But even so, I feel that the ...
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1answer
52 views
Coating brass components cheaply
I have seen a number of products made of brass with a silver-looking coating covering the brass on the outside. These products are all quite cheap (for example a small watering can or clothes hooks). ...
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1answer
130 views
What are functional and manufacturing datums
Can somebody please explain what is ment by functional datum and manufacturing datum, with respect to dimentioning and tolerancing.
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1answer
69 views
Drawing an isometric from a multiview
I'm very new to designing shapes in multi views and drawings and got a homework problem on this. I have to draw an isometric from this multiview drawing. I have no clue where to start and am not ...
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0answers
32 views
High Pass Filter Design from Transfer Function
I need to design an active high pass filter circuit that implements the following transfer function:
$$G(s)= 4.15\times\dfrac{s+530}{s+2200}$$
where, $K = 4.15$, Pole @ 2200 rad/s and Zero @ 530 rad/...
3
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4answers
99 views
Engineering Solution for river cleaning
Sorry if this is the wrong exchange, if it is could you point me in the right direction that'd be awesome!
I have a bit of a problem locally that I think there could be a simple solution that we're ...
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0answers
53 views
Books and resources for an entrepreneur inventor? [closed]
What books would you recommend for an inventor entrepreneur?
3
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0answers
31 views
Required diameter for ballast drop hole? [duplicate]
I'm currently an underground Geotechnical Engineer, don't spend a lot of time on the surface. I'm trying to find a reference or method for calculating the required diameter of a service hole. My Mine ...
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0answers
75 views
How to calculate bearing loads in a two stage helical gear box?
Here P, Q, R, S are the bearings and G1, G2, G3, G4 are four helical gears.
The gear forces tangential(Kp), Axial(Ka), Radial(Kn) are known.
All the distances are known. The forces acting on bearing ...
2
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1answer
147 views
Help with cantilever table top questions
I'm hoping someone can help me with some questions to know whether or not the table can be supported by this design and how to calculate the length of the support runners and the width necessary to ...
0
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1answer
190 views
Tolerance on dowel pin length
Is the length of a steel dowel pin standardized to a certain tolerance? McMaster-Carr provides tolerances on the diameter of dowel pins but not the length. In the event where I want a dowel pin to fit ...
0
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1answer
70 views
Why all watches hands are stacked in that specific order ? Can it be changed?
It's just a matter of curiosity, but I find hard to justify why every single watch keep the hour hand below the minute one; from a user perspective, it seems a poorly design decision for those times ...
1
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1answer
48 views
Boron Carbide Shattering a Bullet
Does anyone know how this works? I hypothesize that the reason that the bullet shatters is that boron carbide is much harder than the copper of the bullet. Does anyone think that this may be made into ...
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0answers
34 views
How to prevent movement in this 3 DOF setup?
I have a 3DOF platform that I'm trying to make more stable. It's difficult to explain in words what the issue is so I've added a GIF below.
Any ideas of how I can get rid of this wobble? The DOF arm ...
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1answer
47 views
Designing a horizontal pressure vessel
The question reads
Design a horizontal pressure vessel with hemispherical head supported by saddle support and fitted with 2 nozzles welded to the head. It's used for storing and delivering fuel ...
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0answers
84 views
press fit ball joint
I enjoy creating mechanical designs but I am not a trained mechanical engineer.
I have a technical issue with a joint design that needs to be permanently retained using a press (snap) fit. Any idea ...
2
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2answers
199 views
Fillet weld strength calculation
I have 2 plates that are fillet welded to each other. How can I determinate the max force the weld can take before it cracks?
The plates are only welded on one side because the other side is not ...
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2answers
71 views
How do you read a blower/compressor curve with multi-curves for inlet guide vanes?
I am trying to apply an existing blower curve in a hydraulic model for a single stage blower with variable inlet diffuser vanes. The variety of curves shown on the plot does not seem to make sense to ...
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2answers
37 views
Dose adapter sleeve hinder the axial displacement of inner ring of spherical roller bearings?
This is supposed to be the locating bearing in my design, the outer ring is supported by the housing and a taconite seal (taconite seal is hidden). So it is fixed in place and can't move at all.
...
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1answer
86 views
How to make datum planes on a cone in Creo?
I am trying to make this
I was able to make the base feature but I am facing problems with the secondary features. So could anyone shed some light on how to make the datum planes on cones.
I made ...
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0answers
21 views
Calculating the proper power of a motor
I'm trying to build a filament extruder with some basic available tools and materials. Simply the main principle of the machine is to insert some amount of plastic raw material ( ABS in our Case ) to ...
1
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1answer
52 views
Base Support for a Tree house
I am building a tree house in my backyard and it is going to be relatively simple. There are no parts that require drilling into the tree. The whole house is propped up by four 4x4 wood supports. I'm ...
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3answers
70 views
Mapping of vehicle to its horn sound
From the "meep meep" of the smallest scooter to the "BLLLAAAAAGGGGGHHH" of the largest seagoing container vessel, vehicles seem to have horn sounds that, in an auditory way, seem to indicate their ...
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1answer
111 views
Resist rotation with friction or teeth?
I prototyped this attractive wooden sit/stand laptop stand
but ran into a problem keeping the legs tight enough to hold their position. There are 1/16" thick EPDM washers between the oak legs - the ...
0
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1answer
73 views
What is the maximum deflection and bending moment of a hinged hinged beam? [closed]
It is not a simply supported beam with one end hinged the other end with roller support. I am working on both the ends hinged beam. i.e at the two ends only rotation about z axis is allowed and all ...
2
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3answers
86 views
Is there any defined mathematical parameter that can give me the average distance of a volume to a point?
I'm currently trying to design a bulk-handling system which minimizes the distance from the bulk material pile(s) where the material is loaded (the volume) to the unloading platform(s) (the point), ...
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1answer
140 views
How to prevent an object doing a full rotation on a shaft
I basically need a block on a shaft to rotate between 90 degrees (vertical) and approximately 180 degrees (horizontal) counterclockwise on a shaft. I don't want the part to fall below 180 degrees. At ...
0
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1answer
41 views
AutoCAD 2019: How do I Find the Perfect Angles to Match Line Endpoints
I'm trying to match up two lines on a drawing I am doing, without changing the length of either line. There is a perfect set of angles to do so- I just don't know what it each. Is there a built in ...
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2answers
69 views
How to construct a compact linear Fresnel reflector
I have recently come across the concept of CLFRs, and I want to build one myself, as a private experiment.
I have a rudimentary knowledge of optics (which I'm sure I'll have to refresh on) - any ...
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2answers
63 views
Would connecting 100's of small telescopes into one huge telescope make for a significantly better telescope?
Not sure if this is a Physics related or Engineering related question, but imagine that we would take 100's of small hobby telescopes and somehow managed to point them all at the same point in the sky ...
