Questions tagged [design]

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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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1answer
32 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 ...
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19 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'...
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2answers
91 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 ...
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3answers
132 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. ...
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1answer
31 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 ...
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2answers
139 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 (...
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1answer
92 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 ...
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0answers
33 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 ...
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22 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 ...
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2answers
69 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 ...
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2answers
48 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 ...
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1answer
88 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 ...
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1answer
51 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 ...
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1answer
15 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 ?
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3answers
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 ...
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1answer
43 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 ...
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1answer
29 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 ...
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2answers
65 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
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0answers
25 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 ...
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1answer
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 ...
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1answer
35 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 ...
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6answers
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 ...
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2answers
86 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, ...
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0answers
20 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 ...
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19 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 ...
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22 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 ...
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2answers
56 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 ...
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2answers
61 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 ...
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0answers
41 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 ...
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0answers
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 ...
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4answers
80 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 ...
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4answers
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, ...
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1answer
57 views

Optimal curvature for a gooseneck stand

Can you suggest the basic principles for optimal neck adjustment of a gooseneck stand such as the one in the image? I'm looking for the curvature that will offer greatest mobility and stability, while ...
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0answers
46 views

How to approach potential hazards that may result from user misuse, in a product design phase? [closed]

I am researching guidelines and considerations with respect to user safety when designing commercially sold products that contain user-operated machinery and moving parts (I.e. motors, pulleys, ...
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0answers
42 views

How to design an outrunner BLDC motor

I've difficulties to find a good documentation or a book to how to design an outrunner BLDC motor. My propose is, defined RPM and approximative kW and some other parameters, which are calculation ...
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0answers
9 views

Question regarding 2D simulation of orthogonal cutting operation on Abaqus

I'm trying to simulate an orthogonal cutting operation on Abaqus, I'm using Dynamic explicit analysis. I have defined my tool as Rigid analytical body and the workpiece is of Ti6Al4V, I have not ...
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0answers
57 views

Guidance for a CAD model of a product

Hi Everyone! I am a novice in CAD modeling, and I am familiar with only two CAD tools - Autodesk fusion 360 and Solidworks. I want to make a CAD model of a product with the outer pod or shell as seen ...
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0answers
27 views

Design specifications Venera 13/14 [closed]

I am trying to 3D model the Venera 13 or Venera 14 spacecraft. These are Russian spacecraft from the 1980s. I am looking for design specifications, plans, schematics, or anything else that might make ...
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2answers
45 views

Where to place air, water and electric cables in a composite beam [closed]

If water, gas and electrical cables have to pass through three (3) openings provided in the cross section shown in Figure 2, with tangible and scientific arguments specify the adequate opening for ...
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0answers
20 views

Spectrometer design

I am looking to design a compact spectrometer based on using one single concave grating as both the dispersive optic and the imaging optic. I am investigating these gratings: https://www.edmundoptics....
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1answer
81 views

How to design an enclosure around the load cell (Beam type)?

Hardware and Electronics Used: Arduino UNO, HX711 ADC Load cell amplifier, Load Cell (2Kg); Currently, I am working on a project which requires me to put load cell along with the other circuitry in an ...
2
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1answer
128 views

On steam locomotives with six driving wheels, why are the rear set of wheels placed further apart from the other two?

So, as the question states, on steam locomotives with six driving wheels, the rear wheels are farther from the middle wheels than the front wheels are. You can see it in these pictures: It's ...
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0answers
109 views

Will high velocity air directed underneath a half-toroid shaped Coanda saucer by a centrifugal impeller create a lifting force?

I would like to know if a lifting force will be created by the Coanda effect from high velocity air that is directed underneath a half-toroid shaped saucer by a centrifugal impeller. I am seeking an ...
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1answer
49 views

Component selection type for fluid-mechanical system

I am creating an enclosure and need to get a water supply through a plastic wall inside to the core device. I imagine this water line will be a flexible tube and will screw on or snap to an adapter on ...
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1answer
352 views

On modifying imported STL files in Solidworks

Some weeks ago I downloaded a couple of 3d models from Thingieverse in STL format and I wanted to make some minor modifications before printing. The modification were: I wanted to split a multi part ...
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3answers
8k views

Why are railroad tank cars bent in the middle?

I recently noticed that the cylindrical shape of a railroad tank car is not completely straight but has a bend in the middle. The entire tank is a bit lower there. What's the reason for this bend? ...
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0answers
39 views

How would you build a road system that respected nature? [closed]

How would build a road system or transportation system that respected nature with the following constraints: No paved roads or less than 10% paved roads can’t use gasoline (oil) allow nature to ...
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3answers
85 views

Mechanical joint that break at specific force

I am designing a joint which I want to break at a specific force. I want to design a 2 parts connected by a joint that breaks when a certain amount of force is applied and thus prevent any damage to ...
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1answer
58 views

What is the best way to build this parametrically in solidworks?

I want to make a structure like the following where: L is the total length and its fixed $\lambda$ is the distance between each arc n: is the number of repeated structures in the center I have ...

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