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Questions tagged [design]

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0
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3answers
53 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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0answers
16 views

My Question is how to build a bird feeder and water access for winter birds, that can be self powered to keep water from freeze [closed]

I will like to build a bird feeder and water access for winter birds. The challenge being using a combination of wind and solar power to keep water from freezing.
-1
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1answer
62 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 ...
0
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2answers
63 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 ...
-1
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0answers
17 views

Self-locking differencial band brake

I'm an undergraduate in mechanical engineering and I'm designing a manual winch for a project. It consinsts of a base, a drum and a crank handle(Note: the handle has no gears). The purpose of the ...
2
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0answers
38 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) ...
1
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0answers
39 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 ...
1
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0answers
27 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 ...
-1
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0answers
22 views

Reference on how to design belt tensioners?

I am designing a system in which I need to use a belt drive transmission. It is rather small (I am using a maxon EC-max 16 8 Watt motor). I found a set of timing belt + pulleys set that I plan to ...
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2answers
19 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 ...
2
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0answers
27 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-...
1
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0answers
27 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
23 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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0answers
43 views

Front loading washing machines vs. the never spoken top loading horizontal-axis rotating drum washing machines?

Front loaders are often recommended and for good reasons, in Europe they are the most used type of washing machine, but I always wondered about this type of washing machines: https://en.wikipedia.org/...
1
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3answers
66 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 ...
1
vote
1answer
51 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). ...
0
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1answer
72 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.
0
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1answer
56 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 ...
2
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0answers
29 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
95 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 ...
1
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0answers
44 views

Books and resources for an entrepreneur inventor? [closed]

What books would you recommend for an inventor entrepreneur?
3
votes
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 ...
1
vote
0answers
49 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
votes
1answer
110 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
77 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
votes
1answer
67 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
vote
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 ...
2
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0answers
33 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 ...
1
vote
1answer
44 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 ...
1
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0answers
62 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
votes
2answers
124 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 ...
1
vote
2answers
53 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 ...
1
vote
2answers
34 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. ...
0
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1answer
56 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 ...
1
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0answers
20 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
vote
1answer
49 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 ...
1
vote
3answers
69 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 ...
4
votes
1answer
108 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
60 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 ...
0
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0answers
68 views

How to create custom thread with specific pitch and thread diameter in fusion 360?

The thread needs to be 7/16 thread diameter and 20 threads per inch(in BSP, British standard pipe thread).The standard size of threads supported in fusion 360(design software) is 11&12 in metric ...
2
votes
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), ...
1
vote
1answer
94 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
votes
1answer
37 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 ...
0
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2answers
63 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 ...
2
votes
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 ...
0
votes
1answer
38 views

Wheel angle for turning

Given a car configuration with a length of L and width of W. If you can give the top left wheel an angle of A to turn A degree how do you derive the angle of top right wheel for turning . I know that ...
0
votes
3answers
69 views

How much force/torque act on a wheel of a vehicle when vehicle moves a constant speed and suddenly got a bump or jerk?

I am working on disturbance rejection technique in a vehicle of a wheel. Suppose our vehicle moves with a constant speed 15 km/h. Since roads are uneven in nature, suddenly vehicle got a bump or jerk. ...
3
votes
1answer
104 views

Finding the velocity of water flowing through a gravel filled pipe

I have a scenario where I have water flowing through a gravel filled pipe, and I need to find the velocity. The pipe is gravity fed (no pumps). My approach is to find the seepage velocity ($V_s$) ...
0
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0answers
54 views

How to connect shaft to gearbox?

I downloaded a 3D model of a planetary gearbox from Rossi website, so the 3D model is reliable. As you can see, there is no keyway on the opening of the gearbox, thus i can't connect my shaft with ...
1
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0answers
149 views

How Can You Calculate Force to Overcome Friction From an O-Ring Seal?

I essentially have a piston in a tube that is sealed with an O-Ring and actuated with a solenoid. The friction of the O-Ring however, is higher than estimated (guessed as far as I can tell) by the ...