Questions tagged [design]
The design tag has no usage guidance.
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Product idea then specification, or specification then product?
I am trying to write a requirements specification for a new product but I am confused about where I should start. Do you start with the product like "A new kettle" and proceed from there, or ...
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What is the definition of depth of cut in machining?
Calculate the machining time required to reduce the shaft diameter by 6 mm if the maximum depth of cut is 2 mm, and also the parting off (cut off) time for the shaft, knowing that: the shaft diameter =...
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Is there a way to get a more 'cubish' version of the bucky-ball structure?
I've read that the reason bucky-ball architecture hasn't taken off in spite of its strength advantage, is because circular profiles don't fit well into rectangular plots, and appliances and furniture ...
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Can/should you support a sagging ceiling from above?
1) How long of a span is too long for rough cut 2x4 inch (45x100) ceiling joists?
Pending what those more knowledgable say, my guess is this room at 5.3m is OK, but not great. It has sagged up to 50mm....
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how do you define tolerances for moving parts so that they work properly?
I have a mechanism in CAD that I want to either 3D print or CNC mill. When I went to the school's shop the tech asked me what the tolerances of my parts where and I had no idea. How do I go about ...
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Question on functional design
Functional architectures combined with solution charts are one way of designing a system.
My question is, if a product is a complex heirarchy of components (for example a potatoe harvesting machine), ...
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Is there a geometry that meshes exactly with a rope?
I'm in a use case where the outer surface is a gear driven by a motor (that's the easy part) and the inner surface meshes with a metallic (iron) rope. When the part rotates, I want the motor and ...
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One way locking mechanism linear movement
Sorry for the English in advance, it is not my native language :)
I am working on a design which involves moving two steel plates in a horizontal linear motion together to clamp around a box. After ...
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Is it possible to convert a structure with a .stl file to a solid structure in Abaqus?
I have a .stl file of a structure and I want to use this file to do a simulation in Abaqus. I need my part to be solid but I don't have any .stp or .iges file of the sructure. So, I imported my .stl ...
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Clutch for rotating axis of mount used for astronomy
a short disclaimer that for me mechanical engineering is a hobby. Please be gentle with me, even if there may be an obvious answer. The main reason for asking here is that searching for the topic you ...
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Measuring angled surfaces with a lidar
I have been trying to create a sensor that detects when a golf club hits a golf ball. My idea was to have a lidar sensor to continuously poll the head of the golf club, and return a positive ...
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How much force needs to be applied on a battery cell to maintain contact?
I'm designing a battery case for cylindrical li-ion batteries similar to the AA battery cases. We need to avoid spot welding to the cell directly since we want may need to replace some cells later for ...
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Rotational lock design for a landing gear of an aircraft
I want to design a rotational lock mechanism for the landing gear of an aircraft. It's function is to make sure the landing gear stays folded when the aircraft is on air and the landing gear's ...
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Expanding a small rubber ring
I have a bunch of small rubber rings that I need to conduct testing on. The rings start at about 15mm ID, and need to expand to 65mm and be held there for months. Right now, my solution for expanding ...
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What camera specs should I look at for smart vision applications?
Currently I'm looking for a camera to work as a 360-degree view of a vehicle but also be used for smart applications, specifically I'm trying to identify certain objects. The 360-degree systems I've ...
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Moving a Bushing in Circular Motion
I am trying to design some way of making a bushing move in a circle. Specifically, I want the center of the bushing to draw out a trajectory that is a 3" diameter circle. I do not want the ...
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How to combine the power of two rods spinning at a different speed into one rod spinning at a combined speed? [duplicate]
I have two rods (that will be powered via something like two water wheels), and I need to combine their power so they both rotate the same rod. Sadly, they may spin at different speeds, and the ...
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Why is my driven dimension affecting my sketch AutoDesk Inventor
I am making a parameter defined sketch that can be changed by editing a few values.
When i was doing some math i created a driven dimension to make sure that i was getting the correct value.
For some ...
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derive functions for generating projections for the interpenetration of two cylinders for making fittings
I want to make custom fittings for constructing large molecular models using copper tubing.
I will need to cut a hole in one piece of tubing that will closely fit around another inserted piece. I ...
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Material selection for plunger to be compatible with pressure seal
I am designing a jig to insert a pressure seal into a cap.
The jig has a cavity which the cap fits into and then is loaded with the pressure seal which needs to be inserted further using a plunger. I'...
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Projection on plane
How to draw the projection of this 3d image on paper ?
I have tried using methods of projection on plane which are given in ND Bhatt book.
Dimensions to be assumed by you.
I have uploaded my rough try ...
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How to visualize isometric parallel projection?
I read the definition of Isometric Projection from this pdf that Projection plane intersects each
coordinate axis in which the object is defined (principal axes)
at the same distant from the origin.
...
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Trying to draw rib tangent to a circle AutoCad 3d modeling
I'm trying to draw a rib tangent to a circle but If some one can link a video or a tutorial on how to do that I'd be really thankful here's the drawing in 2d (the rib is highlighted with the red ...
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Influence of design on corrosion control
In "Ahmad. (2006). Principles of corrosion engineering and corrosion control (1st ed.). Elsevier/BH.", it is stated that to fight against metallic corrosion it is more convenient to design (...
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What is this strange "French balcony" on a newly built house in California, USA?
While randomly browsing around in Google Street View, amazed by how surprisingly cozy they managed to make this neighborhood, I found something very strange. What looks almost like a "French ...
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Animatronic Eye Mechanism - Eye Socket Spring Tension
I am building an animatronic eye mechanism that will ultimately be moved via servo motors for a project I am working on.
It is comprised of the following components:
Eye Plate - 3mm thick Acrylic ...
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Vapor deposition of 5um Beryllium onto 0.5um mylar
I am searching for a service that allows the deposition of 5 micron thick Beryillium onto half micron thick mylar for a R&D project I am doing.
I am having a difficult time finding such a service ...
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How to estimate the number of elevators required in a building?
I've been asked to estimate the number of elevators in a mixed use building with 37 floors (4 basement-parking floors), & design their operation.
Are their any specifications/guides/manuals that ...
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How does one deal with indeterminacy in modeling the motion of vehicles with multiple wheels? (Dynamics Question)
Consider a vehicle with four wheels and suspension (coil and dampers) rolling over an arbitrary surface. What would be the magnitude (not direction) of the normal force on each wheel? Is there a ...
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How should I create the pendant shown below?
I use Creo Parametric to model. I tried to model the pendant shown below, but nothing worked. I first made an extrusion of a circle. Then, I created the outer arc using sweep. I was able to get the ...
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Implementing a locking mechanism for a rotating platform [closed]
I have a square platform 2' X 2' X 1". It has clamps on two of its sides that clamp down on the small faces. These clamps are on opposite sides of each other, and they also have shafts sticking ...
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Opening Creo file in student edition
Is it possible to open a part created using Creo commercial edition in the student edition ? I tried this but it doesn’t seem to work. Is there a way to do this ?
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Why does this fence have a kink?
The image below shows a style of fence that I've seen frequently around train tracks. If you look closely, you will see that between the third and fifth horizontal wire from the top, the vertical ...
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Motor For powered adult swing
I'm trying to design a powered swing for adults (similar to a baby swing, but scaled up). Am I right in assuming that this is functionally a pendulum and the power required is (0.5)mgsin(t)? How ...
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Need new pressure switch mechanism for a 3 phase compressor using a 220V AC Drive
I've bought a vintage Quincy 216 air compressor. Actually there are duel Quincy 216's - each has a separate 3 phase motor. One motor is 1.5 HP and the other motor is 2 HP. The compressors share a ...
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Can stainless steel be used in continuous high temperature environment (500°C to 850°C)
Can i use stainless steel as a furnace roof. Furnace temperature will be max upto 850°C. If so which ss grade will be the best in this situation. Thanks
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What are the limitations of Gravity Sketch? [closed]
Gravity Sketch is a program (app) for the Oculus VR platform. What are its limitations compared to, say, Fusion 360 (a slightly more traditional design platform?)
It looked like it doesn't provide ...
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Please accept my request for an obsolete engineering theory [closed]
I am writing a thesis concerning government organization, and I would like to make the analogy that illustrates that law scholars are failing to seek practical solutions, because they are confined to ...
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Solidworks - how to make a groove on a double curvature surface
Today, as I was making -for another post - the following part
Although, I managed to use a couple of ways to do the above (revolve a sketch, and b) using swept cut) I wondered how would I make ...
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How to work on big CAD project in team?
I'm always confused on what is the effective way to work on CAD with multiple team members to make it efficient. So far, as I'm freshly graduated I only work on a project where I'm the only one using ...
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Why design chargers with USB port on a side rather than top [closed]
Edit 3: the question being closed due to being opinion based? The design causes problems that are not in the other design, there are no benefits provided for the restrictions that the design imposes, ...
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Sign convention for angular velocities in 3D gear train
Consider a Humpage gear train shown above. We are viewing the gear train from right and gear B is rotating in clockwise direction. If we consider clockwise direction as positive what will be the sign ...
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Creo Parametric 4.0 balloons BOMs for multi page drawing
How to put repeat balloons on the partial views of assembly?
Example
Full View
BOM
Question
How to put a balloon (Item 1) to the Auxiliary view? Note: number should be parametric
Follow up
Are here ...
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In a high pressure water pump what component or design parameter increases pressure output, let's say from 200 atm o 2000 atm?
type of flow? length or diameter of the plunger piston?, or weight of the piston and crankshaft and torque or HP to move it?, or RPM. direct drive pumps used in waterjet cutting use a slim plunger ...
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Discrete-time realization for continuous time domain controller/filter?
Let us say I simply design a low pass filter like (1/s+1) with the cutoff frequency as 1 rad/sec, when I implement it in real software, do I have to do the discrete-time realization? If not, what ...
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How to design stiff plastic sheet
I am making a cylinder of polypropylene that must be pressurized (2 bar). The rough dimensions of the current design (A) are 7 cm tall, 5 cm in diameter, and wall thickness of 1-2 mm. The issue is ...
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How to estimate effective area of contact between rough surfaces as function of surface roughness
The engineering problem that I am trying to solve is the following: I have two elements of a magnetic circuit that I must keep in contact through threaded fasteners. The primary objective is to ...
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Lab Jack with Bi-Dimensional Movement
I just bought a lab jack like this one:
Its purpose is to change its height without loosing its rigidity by using the so called: scissors mechanism
I was wondering if there is a similar device like ...
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Balancing suction air flow at different areas on pipe
I have a T-shaped pipe that is connected to a vacuum pump. Along one side, there are 4 areas of 9 holes where air will get sucked in from the surroundings. It's used to pick up some small objects.
The ...
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Why don't motorcycles have as good a turning radius as bicycles?
The question is about why are motorcycles not manufactured with handlebars that can turn to great degrees like a bicycle. In most motorcycles, you hardly have a steering angle of about 20-30 degrees, ...
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