Questions tagged [computer-aided-design]

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2
votes
3answers
97 views

What is “reversal” in mechanical engineering drawing?

I've come across these terms "reversals allowed" and "reversals not allowed" in a sample drawing while reading a GD&T course. What exactly are these terms? What do they mean?
2
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1answer
19 views

Per the ME Pavement Design Guide MOP, Section 5.3.6, Eq 5-18b, how is p02 assumed if not entered in Pavement ME?

The MOP, equation 5-18b calls for p02, which the MOP describes as the "Percent passing the 0.02 mm sieve". I assume that this is the percent passing for the subgrade. We only input down to ...
-1
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2answers
35 views

How did OXO manufacture this colander with such intricate wall feature?

Here's my guess, but I would love to hear another perspective. I think this is injection molded. This colander has draft angles and the two mold halves use an intricate step-like wall pattern to ...
0
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0answers
21 views

Invalid constraints in creo

I’m trying to assemble a pistol pin into a piston using creo parametric 5. When I select the surface of the pin and the inside hole of the pistol this works fine and say that it is partially ...
2
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0answers
28 views

Is there a standardized file format for parametrised solid modelling?

Is there a standardized file format for parametrised solid modelling? I am familiar with STEP and IGES file formats for saving solid models, but AFAIK they don’t store information regarding parameters,...
1
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2answers
48 views

Design automation using fluid dynamics simulations

I have a question about design automation or generative design. There is a company that creates pumps. Their work-flow is following: 1) create design of a pump using CAD 2) create mesh for ...
0
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1answer
25 views

Getting the elevation of a specific point of a elevation gridline

In a highway Project, I have to design a road connecting to roads together. The map I have on AutoCAD is a elevation gridlines map and I have x, y and z coordinates but I don't know how to get an ...
0
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0answers
27 views

Program for creating a cylinder given its axis, center and radius?

I have data with the following normalized values: Unit vector for cylinder axis: -0.00270666, -0.01226211, 0.9999212 Normalized coordinates for cylinder center 0.01412114, 0.01074875, 0.00017004 ...
0
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1answer
66 views

ANSYS Design Modeller more significant figures

I need to just get the volume from ANSYS Design Modeller but I would like a higher number of significant figures rather than just 5 (See picture). How do I do this? Thank you for your help!
0
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1answer
170 views

Custom User Models in Aspen Plus

I'm trying to simulate a purifier in Aspen Plus in a cryogenic system. This purifier is just meant to change the pressure of the outlet stream based on the inlet flow and pressure (we are using the ...
0
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0answers
37 views

Software to find the common volume of intersecting cylinders?

I would like to find the common volume between cylinders for different radii and at different angles (3-D). Can I do this using ANSYS design modeller? Or what can I use (preferably a free download for ...
0
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2answers
85 views

Master/Slave Gear Mechanism for Navball

I am designing a functional replica of the Apollo FDAI (aka 8 ball). See pics Real FDAI Another view From the Apollo 8 Flight Journal: The FD/AI (Flight Director/Attitude Indicator) or "8-ball" ...
0
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0answers
24 views

Help finding connector to fit 1 3/8in / 35mm mounting flange on horn driver

My project is a DIY talkbox using Monacor KU-516 compression driver. I'm having a hard time finding the right connector to fit the hose to the driver, M35 is a rare size it seems. There's one ...
1
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3answers
152 views

Solidworks - How to safely clone a large multi-assembly project?

I have a top level project directory with about 40 Assembly files and several hundred SLDPRT files and they are all highly dependent on each other. The original version of this works fine and has no ...
0
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1answer
63 views

Regarding design of fixation of a part

I would like to know if there is any theory behind designing the fixation for any part. To optimise the number of mounting holes and fasteners. If so what is it called and where can I get it? Please ...
1
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0answers
68 views

Simulating fluid dynamics for Generative Design of water turbine in Autodesk Fusion 360 [closed]

I am trying to use Autodesk Fusion 360's generative design feature to produce more efficient turbine blades for hydroelectric power generators. How can I simulate the load of water-fall on a turbine ...
0
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1answer
39 views

what subject in Mechanical engineering deals with the making of External cases for electronic gadgets?

can anybody tell me what subject in Mechanical engineering deals with the making of External cases for electronic gadgets? I know I need to use CAD/CAM but I am asking this question because I want to ...
2
votes
3answers
94 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
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0answers
166 views

What constructive solid geometry CAD programs can accurately model and simulate structural rope, cable, pulleys, and dynamic motion elements?

It seems that flexible objects just don't model well in many popular constructive solid geometry (CSG) CAD programs. Most CSG modelers seem to assume exclusively rigid bodies with sharply defined and ...
3
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1answer
197 views

Simple and easy Open Source CAD tools for basic 2D and 3D designs [closed]

We are planning to start a basic course on Computer Aided Designs (2D and 2D) for high school kids. The idea is to help them shape their innovative ideas into something tangible. We shall finally ...
1
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2answers
1k views

Shaft Spline Information

I have a shaft with splines on it that I want to create a drawing for in Solidworks because I may need to have this specific spline replicated on a part in the future. Does anyone have any ...
1
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0answers
26 views

How do I configure g-simple so it does not use G81 code?

I have a CNC that does not understand the G81 code for drilling. G-Simple looks to be configurable but I am finding it difficult to find information on it. It looks to have a "USE" command with a "G81"...
-1
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2answers
118 views

Autodesk Suite vs SolidWorks comparison [closed]

I've worked in SolidWorks for 3 years now and have found it to be a highly productive and capable software. I recently heard in passing that Autodesk surface modelling is far superior to SolidWorks. ...
1
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0answers
461 views

Why can't current tennis sensors measure actual spin in RPM? [closed]

I'm just curious if anyone thinks this can be done. I assume if it was possible somebody would have done it by now. From what I understand, Hawkeye is the only device that can measure RPM. At present, ...
0
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1answer
697 views

Simple, open source aerodynamics simulation software that can import Blender or Sketchup models? [closed]

What are some basic, open source aerodynamics or CFD simulation software that can import Blender or Sketchup models? I am looking for software that is easy-to-use, free, and suitable for educational ...
1
vote
3answers
121 views

'Length measure' vs. 'length measurement'

I have to write a scientific paper where I refer to a CAD drawing. Now, I'm a bit confused, because I have to refer to the length "parameters" on that drawing (as opposed to the angle "parameters"), e....
2
votes
2answers
878 views

Can Sketchup produce drawings that are adequate to manufacture components?

I'd like to design some things with bolts, fan belts, levers, motors, etc. So I'd add a bolt here, drill a hole there and maybe take it apart and rearrange. I'd like to do it in 3D and found ...
5
votes
1answer
377 views

How do you create a chamfer in 3D CAD that joins the edges of two different shapes?

I am trying to make a 3D model. It consists of a cylinder resting on an extruded ellipse as you can see in the picture below. I now want to join the top edge of the ellipse with the top edge of the ...
-1
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1answer
195 views

Create a movie from STL file? [closed]

After finish designing a product and having some STL files, I would like to make some movie of it, and animate it . For example same as Apple does in its marketing ...
1
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2answers
89 views

Is there any aspect of an Explosion resulting from a nuclear weapon test that cannot be simulated using super computers?

This Washington Post news article states that with the advent of computer simulation of nuclear tests, live tests are no longer needed. Generally speaking there are 3 aspects of an Explosion resulting ...
3
votes
2answers
296 views

Intuition vs software results

I've recently designed what is essentially an aluminium box. I've done the entire design process of CAD software SolidWorks and then done some simulations of loading of the box. Through iterations I'...
2
votes
1answer
250 views

Is conversion from EMC (*.ngc) to heidenhain (*.h) CNC code possible?

I have some gcode created with dmap2gcode. This and Meshcam are the only software I could find that could would take a large image and create the necessary gcode. Now I would like to try cutting ...
-3
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2answers
157 views

How feasible is “computational engineering”? [closed]

How feasible (in practicing engineer sense) do you think is the general concept of "computational engineering"? That is, engineering design carried predominantly on computers, with as less physical ...
5
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7answers
2k views

Can I use AutoCAD to learn mechanical engineering by DOING (like programming)?

I would like to learn mechanical engineering as a side project. But, I would like to learn in a way similar to programming. Learn by doing. Of course I understand I can't build things automatically ...
5
votes
1answer
1k views

What is the script function to select Solid Body in ANSYS Design Modeler?

I need to select a solid body in ANSYS Design Modeler, with script, in a design with multiples bodies. With the following command I select all the solid bodies, but this is not what I need. ...
7
votes
1answer
204 views

Sending out a 12d Civil Design Model

My project team and I delivered the design of a 14ha urban infrastructure development in Sydney for a Client. The project was to hand over the development at a Tender level of design, which would be ...
2
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0answers
61 views

Why don't I see a yellow preview indicator when using the chamfer tool?

I'm having problems trying to use chamfer on an edge. Typically I see yellow previews of how cuts/extrusions will appear, but this is not the case for my first time using chamfer. I have tried looking ...
4
votes
1answer
68 views

Accounting for blank registration within CAD design

How do CAD designers account for the fact that a blank may have to be flipped to a different side in order to allow the piece to be completely milled through a CNC system? For an example, let's use ...
3
votes
1answer
479 views

What makes a good piping and instrumentation diagram tool?

A while back, I asked this question for a free Piping and Instrumentation Diagram (P&ID) software on softwarerecs.SE. I described the core features of a P&ID software thusly: Where a proper ...
10
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5answers
1k views

How is a mechanical system designed and tested without building a physical model?

I am new to mechanical engineering, although I have a scientific background (postgrad in Mathematics), and I (mostly) code for a living. I have an idea about creating a mechanical device; I envisage ...
4
votes
1answer
774 views

Are boxy edges normal in SolidWorks when working with a drawing?

I'm giving SolidWorks a try and am following one of their tutorials on creating a part. When I create circles they are looking a bit "boxy" to me. My graphics card has 512MB of ram and I have checked ...