Questions tagged [design]

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14 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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1answer
42 views

Problem with railway crossing, need help!

I am looking for a solution to my real-life problem that not only affects me but also many other people. I am simplifying the problem to make it easier to understand. My daily commute to work includes ...
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4answers
6k 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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2answers
82 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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2answers
57 views

Struggling to find solution: question 1 (Finding the maximum length possible of a rod with specific stresses in action)

Could someone please help with the problem below? Edit 1:My guess on this question is: when I plot in the formulas, the stress rooting from the bending moment overcomes greatly over the other ...
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1answer
106 views

Z-axis auto adjusting fixture device

I am looking for a mechanism that would allow me to support a fixture attached to a 3-axis motorized stage. I have attached a picture of my current design. I trying to design/incorporate some sort of ...
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3answers
163 views

Design of Gating & Runner system in Gravity Die Casting

How to design gating and runner system in permanent dies so that material flows smoothly throughout the design without spilling back from the gating channel. What should be the shape of gating system ...
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1answer
86 views

Designing PVC structure

I am an electrical engineering student that wishes I could have taken some civil engineering courses. Anyways I'm trying to design a pvc structure that I will use as a somewhat complicated room ...
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0answers
18 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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1answer
140 views

Special trimaran design for extra power [closed]

First time posting on this particular forum so the usual about directing me to another stack exchange if applicable. I found most related questions to boats here, so I hope I'm at the right place. I'm ...
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0answers
15 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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2answers
134 views

Designing a loaded voltage divider?

I was wondering how to design this circuit in depth, since I have no idea what to do.
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0answers
21 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
44 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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1answer
49 views

Applying ISO fits to radial bearings

Do you need to take the bearing size tolerance into account when creating the tolerances for the mating hole/shaft when using ISO 286 tolerances? For example, a 125 mm OD bearing with a desired H7 ...
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1answer
54 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 ...
1
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1answer
68 views

Application of Bernoulli's equation between stationary and moving reference points

I'm working on a pipe design problem using Bernoulli's equation, from first principles. The pipe is from a water storage reservoir (point 1) and discharges into a river (point 2). These are my two ...
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2answers
4k views

Snap-fit design

I'm designing 2 objects that should be attached to each other and removed when it's necessary. So I though about snap-fit as a solution. There is a lot of types of snap-fit but I'm planing to use a ...
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2answers
51 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 ...
2
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0answers
37 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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2answers
77 views

Best support for a granite table top?: Flat bar 316L Stainless Steel or equal box section or unequal box section

Project is outdoor granite topped table. Table legs are two isosceles trapezoids crossed together at 90 degrees, with the legs having an internal angle of 80 degrees, made from 100 x 100 x 4mm 316L ...
4
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1answer
456 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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1answer
30 views

Force Required to Push an IV Pole

So I am working on a personal project that involves an IV pole. In a standard IV pole with lockable casters, there is still some give in the vertical section of the pole. If you apply a force to the ...
1
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1answer
169 views

What is the best heat and moisture resistant adhesive?

I have to join metal to metal (Aluminium or SS piece onto a vertical SS wall) that could take a shear load of say, 600gm with an area of contact of around 2cm^2. The environment is above boiling ...
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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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1answer
72 views

Jamming & linear guiding

For a linear guiding I need to know the concept and understand the jamming limits. See picture. If I choose concept 1 or concept 2, what will be the value of X? How can I calculate this?
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4answers
78 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 ...
4
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1answer
103 views

Is an Adjustable Stiffness Flexure Spring possible?

I have recently discovered flexure springs (see image below), and I am interested in using one in an amateur project I am building. However, I would prefer if I am able to adjust the "stiffness" of ...
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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
25 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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1answer
97 views

Detachable tubing connections (joints) for frame assembly

I am looking into fabricating a steel tubing frame that needs to be dis/assembled (applies to many larger furniture like bed, shelving unit, wardrobe, cupboard, cabinet, ...). What are the variants of ...
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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 ...
2
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1answer
66 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 ...
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1answer
42 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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0answers
54 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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2answers
119 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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0answers
25 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
111 views

How to design a magnet to handle a known force?

There is a metallical structure. I can estimate how much steel are in it. I would like to know how tall/strong a magnet should be to maintain a certain object to the metallical structure. The object ...
1
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2answers
43 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
19 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....
3
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1answer
370 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 ...
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0answers
90 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 ...
4
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2answers
739 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 ...
2
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1answer
117 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 ...
1
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1answer
78 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? ...
2
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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 ...
1
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3answers
70 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 ...
1
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1answer
54 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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