Questions tagged [design]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
4 answers
67 views

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 ...
user avatar
1 vote
1 answer
42 views

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 =...
user avatar
0 votes
0 answers
18 views

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 ...
user avatar
0 votes
2 answers
43 views

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....
user avatar
  • 101
0 votes
1 answer
39 views

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 ...
user avatar
0 votes
1 answer
19 views

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), ...
user avatar
0 votes
1 answer
62 views

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 ...
user avatar
  • 13
0 votes
0 answers
42 views

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 ...
user avatar
  • 1
0 votes
1 answer
41 views

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 ...
user avatar
  • 11
0 votes
1 answer
43 views

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 ...
user avatar
0 votes
2 answers
41 views

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 ...
user avatar
0 votes
1 answer
44 views

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 ...
user avatar
1 vote
1 answer
123 views

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 ...
user avatar
  • 11
1 vote
1 answer
44 views

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 ...
user avatar
0 votes
0 answers
16 views

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 ...
user avatar
0 votes
2 answers
36 views

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 ...
user avatar
0 votes
3 answers
60 views

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 ...
user avatar
  • 101
0 votes
0 answers
54 views

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 ...
user avatar
0 votes
1 answer
35 views

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 ...
user avatar
0 votes
0 answers
20 views

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'...
user avatar
0 votes
2 answers
96 views

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 ...
user avatar
  • 1
0 votes
3 answers
154 views

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. ...
user avatar
0 votes
1 answer
52 views

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 ...
user avatar
1 vote
2 answers
149 views

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 (...
user avatar
  • 111
4 votes
1 answer
94 views

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 ...
user avatar
  • 49
1 vote
0 answers
48 views

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 ...
user avatar
0 votes
0 answers
23 views

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 ...
user avatar
3 votes
2 answers
98 views

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 ...
user avatar
1 vote
2 answers
51 views

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 ...
user avatar
0 votes
1 answer
105 views

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 ...
user avatar
1 vote
1 answer
170 views

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 ...
user avatar
  • 111
0 votes
1 answer
35 views

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 ?
user avatar
  • 163
24 votes
3 answers
7k views

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 ...
user avatar
  • 400
0 votes
1 answer
54 views

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 ...
user avatar
  • 103
0 votes
1 answer
42 views

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 ...
user avatar
  • 101
0 votes
2 answers
97 views

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
user avatar
1 vote
0 answers
39 views

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 ...
user avatar
  • 131
0 votes
1 answer
61 views

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 ...
user avatar
0 votes
1 answer
50 views

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 ...
user avatar
  • 22.6k
9 votes
6 answers
2k views

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 ...
user avatar
  • 355
-1 votes
2 answers
90 views

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, ...
user avatar
  • 119
1 vote
0 answers
32 views

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 ...
user avatar
  • 124
0 votes
0 answers
22 views

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 ...
user avatar
0 votes
0 answers
24 views

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 ...
user avatar
0 votes
2 answers
62 views

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 ...
user avatar
  • 57
0 votes
2 answers
65 views

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 ...
user avatar
2 votes
0 answers
45 views

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 ...
user avatar
  • 21
0 votes
0 answers
42 views

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 ...
user avatar
  • 101
1 vote
4 answers
104 views

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 ...
user avatar
10 votes
4 answers
7k views

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, ...
user avatar

1
2 3 4 5
9