Questions tagged [cad]
Computer-Aided Design is the use of computers in the engineering design process. It involves drafting, modelling, simulation, optimisation, and creation of technical documentation. The term CAD is often used to denote software for computer-aided design.
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Hexamesh of a helical coil in ICEM CFD
I am trying to mesh a helical coil segment in ICEM CFD. My approach is to create a 3d block at the start of the geometry, and then extrude it along the center curve:
However, when I do this I end up ...
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Automatic letter connection for plasma cut parts with nested holes
Something I'm consistently running into as an issue is connecting letters so they don't fall out or leave a missing unconnected hole in a letter that is cut out of metal. Is there a way to ...
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In Ansys ICEM CFD, what do these "cube" symbols on the midpoint of block edges mean?
When I was meshing a helical coil, I've noticed these "cube" symbols located at the midpoint of a the block's edges:
Blocks with these symbols tend to have a lot of strange/unpredictable ...
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Stepcraft specific CNC post processors for solidworks cam?
I searched some post directories but I am unable to find any Stepcraft specific posts for Solidworks. I don't have the licenses or money for other products, and I want to be able to do everything in 1 ...
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How does one post process in LS dyna for a seat belt?
Intro: I am looking to use LS Dyna to model a dummy crash.
I have done all the dummy positioning and set up but can not find any tutorials or info on the post process, boundary conditions and running ...
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How to design a gear decoupling system?
I'd like to convert my stupid door lock into a smart one.
I already have a gear for the lock knob. Now I'd like to design a gear decoupling system that will be connected between the knob and the motor ...
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Copy metal sheet component in Fusion
I'm searching for a way to convert my sheet metal into a volumetric mesh or to copy it because I need it twice. I can't because Fusion tells me that because it's a metal sheet it can't be copied.
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How to express one constraint as a function of another with sum in FreeCAD
I have one named constraint, R1, and now I want to define another constraint as R1-5. How can this be done? I been reading here and I manage to make it work with product and division but not sum or ...
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Reference geometry for a 3D arc in SolidWorks
Spherical Parallel Manipulator in SolidWorks
I am drawing in SolidWorks a 3D arc with two holes on the edges. An axis of rotation passes through the center of one of these holes, around which the arc ...
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How to stop gear from wiggling despite connected gear being fixed in place?
I have designed and 3D printed a gear system with three gears. Two identical gears at each end with a smaller gear in the center. One of the larger end gears is to be rotated by a stepper motor, the ...
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What is the relation between metric thread nut hexagon diameter and the major diameter
If we a M12 bolt what will the relation between the major diameter and the hexagon diameter be?
If we calculate it geometrically it should be $E(Hexagon\space diameter)=\sqrt{3}d(major \space diameter)...
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How do I sweep one sketch along another in FreeCAD?
I'm new to FreeCAD, I want to sweep one sketch along another. Here I want to sweep the rectangle sketch along the curvy path.
But it ends up like this when I use Additive Pipe:
What setting am I ...
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CAD: How to model complicated smooth shapes?
I'm somewhat new to CAD and don't exactly know what terms to look for. So far every model I've seen or made is essentially built from straight lines and circle segments or other "primitive" ...
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SolidWorks PDM drawing watermark when referencing older version?
How can you add a watermark on SolidWorks drawings/templates present when the drawing is not updated with the most recent part file? This would be very helpful in order to reduce production errors.
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Are there any tools to revolve a solid on an axis without creating copies?
I am using Autodesk Inventor Professional 2023 for a robotics assembly. I can export the assembly in the picture as a .ipt file and revolve it in a pattern with x repetitions, spread out radially ...
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Autocad Electrical 2022 flags a file as modified even if I just scroll around in it, is there a way to disable that?
I'm new to using autocad, so I'll open up a document, look at it and close it without changing anything, but if I scrolled around it flags the files as modified and asks if I want to save them. It's ...
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Steep gradients spontaneously emerge during convection (discrete approximation)
I am learning fluid dynamics, and noticing an odd problem in my computations which I understand, but wouldn't expect, so I would like to know what I'm missing. I feel like it's something silly.
At ...
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CATIA V5 Teardrop bubble 3D Model
In CATIA V5 I am having difficulties transforming my 2D sketch into a 3d model, I have attempted to use the Multi-sections solid tool but if im honest i am struggling to grasp how to use it. Can ...
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Best way of SolidWorks rendering for product catalogs
For a catalog of many different parts I want a clear render but not as 'realistic' or detailed as I would get with SW Visualize. Are there any other options or settigns to achieve this?
Some examples:
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Designing pinions for an angled differential
I'm designing a set of beveled gears where the input and output are oblique. It's simple to design a single pinion connecting them, two isn't hard, and I can model three as pitch cones, but getting a ...
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Are bolt and nut dimensions standardized?
Given the nominal size of a bolt/nut, e.g M10, can one construct all other dimensions from it? Do these dimensions differ between manufacturers or are these standardized. If so, where can I find ...
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How to determine hole placement on a flat surface in an engineering drawing?
I am to model this part in CAD, but I am unsure as to how the hole spacing on the plate is constrained. Is there something I am failing to see in this drawing that defines the hole placements?
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CAD PTC Creo 5: How to get correct section view of rib feature
Hi. I am trying to get the correct section view of rib feature (as shown in the middle) in drawing made on PTC Creo 5.0. However, I can only get the view on the right.
Please help. Thank you.
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In AutoCAD 2015 is it possible to dynamically label a line with bearing and distance?
In my AutoCAD 2015 project, I would like to label lines with a bearing and distance, similar to the image below, ideally in a way that allows them to dynamically update if I adjust the lines.
I've ...
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Cadwork how to solder separate parts in 3D
I don't know if this is appropriate Stack Exchange site, but since it is for engineering I assume it is. In Cadwork v18 you could solder two separate parts (with shortcut ...
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Highlight gaps on joined surfaces - CATIA V5 (GSD)
Is there a possibility to highlight the gaps that occur when surfaces are joined?
The gaps are displayed within the command. But after the surfaces are joined, the gap is no longer visible, but it ...
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Is the stiffness matrix defined for Element or node?
I see 4 terms in the stiffness matrix of a linear truss with 2 nodes (11,12,21,22). What is the order of the stiffness matrix? What does K(1,1) K(1,2) K(2,1) and K(2,2) mean?
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Diff/merge for CAD in 2022?
I'm fairly new as an ME, recently graduated so I'm used to working solo. Wondering how teams collaborate and do version control when working on an assembly together.
In software, git's diff/merge ...
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T9 Torx Screw Thread diameter in Metric System
Helllo,
I have to design a part that will have screws that can be taken apart with a T9 Torx Screwdriver. These are the screws that are taken apart first thing here.
What is the thread diameter of ...
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How to hide lines from adjoining faces in Fusion360 drawings?
I'm designing a holding tank with a complex set of planar faces in Fusion 360 and want to produce face-oriented 1:1 drawings to fabricate a cardboard mockup for interference testing. I'm creating ...
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What CAD formats support material properties?
Let's say I have some parts nicely defined in a CAD package which supports assigning material to parts:
Now I'd like to export this to another program and retain this information for the purposes of ...
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Hex Header for SolidWork file types
I have had a HDD become corrupt and trying to retrieve files off of the drive Iv got all except for .SLDDRW, .SLDPRT, and .SLDASM I have tried to get the hex header from these file types to assist in ...
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FreeCAD: FemAnalysis Python module missing
After trying to execute the GMSH macro by psicofil I got an error:
...
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How to place a chamfer on the end of an angle cut pipe
Background
The part above is from 1944 V2 plans which I am using as real world practice examples to teach myself 3D modeling using Inventor LT 2021. Therefore there is no original designer/engineer ...
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What is causing the elliptical shape around the marked hole?
Background
So I am looking at this piece titled "Ring" and I cant figure out what I am missing in the drawing that cause the elliptical shape at the two hole entrances on the right side of ...
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Thread indicator and modelling
In my on going series of teaching myself to model machine parts in Inventor, I keep stumbling across the following scenario for both external and internal threads. My reference drawing are from the ...
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Replicate loft-based object to value-driven object
I've made the following oddity in Solidworks:
All the dimensions are known except for the top part. This is probably because this was done using the Lofted Boss/Base feature. The Loft profile goes (...
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In which file format are technical drawings saved/stored? How can the data be exchanged between other software?
I just want to know how the information contained in technical drawings is stored? Is there a kind of major representation/file format such as the boundary representation? Is all the information ...
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Mounting an electric motor to a transmission: how to measure
I'm trying to fabricate parts to mate an electric motor to a manual car transmission (although, I think this is a more general question).
I need to connect this:
To this:
Like this:
The approach I'...
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Autocad mechanical 2023 how to draw a tangent line?
I am learning Autocad because the company I have perspective to work for is using it.
I have tried couple of things but none of them worked, first of all if I click ...
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How are 2D views from a 3D CAD Model stored in STEP-File with Boundary Representation generate for engineers to define details? And why?
I am new in this topic and need some help. There are 3D CAD models (stored as STEP Files with the boundary representation) and some engineers need 2D views of these models for further processing. With ...
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Using FreeCAD to retrieve planform area of aircraft
I have a science project I'm working on that involves a need to know the planform area of airplanes. The planform area is the area of an airplane as viewed from above the plane.
I was told by someone ...
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Why is my toolbox empty? (SolidWorks 2021)
If I open SolidWorks and go to the toolbox, it only shows 1 map named 'Favorites'. The toolbox as well as the 'Favorites' map are empty. If I click to configure it opens a window as shown in the ...
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Are these section views correct Autodesk inventor
So I used AutoDesk inventor and created this machine part for the purpose of exercise , But it is preferred to not to hatch ribs in my course so is there a way to make it look like image (5 and 6) ?
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Autodesk inventor create rib feature failed
It's been kind of painful to create a rib I'm new to inventor while I was trying to create a rib symmetric about the YZ Plane this error keeps popping up
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How to draw hidden rib in Autodesk Inventor
I drew the outer hollowed body and the cylinder on 2 separate parts but I can't figure out how to draw this rib so that it is passes through the centre of the cylinder, a video of a similar example ...
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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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What software is used to create the graphics for stuctural analysis textbooks?
I want to create some 2D and 3D drawings of simple trusses and frames. and I was wondering, what is the software used to create the graphics seen in structural analysis textbooks (example: R.C ...
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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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Best Practice for Tracking Vendor Firmware Rev
My employer has had me create a model of a vendor product (using OnShape) and make a simple drawing with some overall dimensions that we can hand to customers. However, they want to include the ...
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