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Swept material removal with a non-circular profile

Hi all
After projecting a curve on a complex surface, I must do a swept material removal (which follows the course of the projected curve).
If the profile of my material removal is circular, no problem, I select this option, indicate the diameter and the scanning is carried out without difficulty.
On the other hand, if the profile is no longer circular, I have to define a profile perpendicular to a point in the trajectory.
The question then arises of defining a plane perpendicular to a point on the plot. How to do this?

When scanning with a circular section, SW 2016 shows 2 connections on the strong line scan.
I used one of these sections to project it onto a 3D sketch to define a plane that I assume is perpendicular at this point to define the profile of the desired scan. Unfortunately an error occurs and a message tells me that "the scan operation has not been completed"

I can't seem to solve this problem and all your advice and opinions will be welcome.


test1.jpg

Hello 

Can you share your piece so we can take a look?

1 Like

Here is your piece

attached file SW 2017

@+ ;-)


enlevement_de_matire_sur_projection_mbrel34.sldprt
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Thank you for your answers.
Unfortunately it is not possible for me to open the gt22 file because I am working with SW 2016. It's a shame because I would be curious to know his solution and especially to understand why with a circular material removal, there is no problem, and why it gets stuck when drawing the material removal.

post your part file to understand why it doesn't work

Here is a removal via projected sketch

see this file in SW 2012


enlevement_de_matiere_via_esquisse_projete.sldprt

@ mbrel34

To help you I made you a PDF from the work of @ gt22 (whom I salute) without adding or subtracting anything.

 


enlevement_de_matiere_sur_projection_et_profil__v1a.pdf
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thank you @Zozo +1

Thanks to Zozo+1 and gt22 for your assistance.

However in the PDF I don't understand how sketch 3 is positioned, Moreover I don't want a circular shape but an isosceles V-shaped groove.
Also, in the Scan function options, what does "Specify a direction vector" mean in Twist Profile?
A big thank you to both of you.

The shape was not circular but elliptical 

3D sketching is the conversion of the projected sketch

you then need to put a point on this 3D sketch

after creating a plane perpendicular to this 3D sketch that is coinciding with the point

On this sketch you create your profile

it is for what purpose

Here is a section of your piece with your isosceles triangle removal

@+

 

 

Thank you again for this answer.
The goal is to place a cylindrical rod in this groove on a part made on a 3D printer.
Despite all your explanations, there is one element that escapes me on the first instruction, namely "The 3D sketch is the conversion of the projected sketch" I understand this, but I can't understand or do I have to draw the sketch that will be projected? On what plane? and what shape should I draw?
For the rest, I think I have understood the procedure.

Sorry for this lack of understanding on my part.

 

If it's a cylindrical rod to insert 

Why do an isosceles triangle-shaped material removal?

I too have trouble understanding your previous answer

there is only one projected curve

And it is this curve that I convert into a 3D sketch

then you create a point on this 3D sketch

For the plan you select Create plan 

And as a reference you take your sketch 3. D

and the point 

On this plan you create a sketch of the profile you want to do the material removal

@+

To answer your question, the choice of the V-shaped groove comes from the fact that the rod should only protrude a few tenths of a mm from the face and for the moment this value is not perfectly known.
Concerning the route to obtain this V-groove, I still stumble over the creation of the plan. For the first element, the choice of the point is not a problem, but for the next 2 choices, I don't know how I can use my 3D sketch (see attached file).
I am very sorry that I do not understand this procedure.
Kind regards.
 


test2.jpg

Hello

What is attached is not the file but an image

so the point is selected

all you have to do is select your 3D sketch in 2 refs that seems open????????????????

me personally in general

I press the Ctrl key

I select the sketch and the point in this order, the plane, this direct fact

@+

Create plans

You can create plans in part or assembly documents. You can use these planes to sketch, to create a section view of a model, for a neutral plane in a draft feature, and so on.

  1. Click Plane  (Reference Geometry toolbar) or Insert > Reference Geometry > Plan.
  2. In the PropertyManager, select an entity for First Reference select_edge_faces_vertex.png. The software creates the most logical plan based on the entity you select. Select options under First Reference, such as Parallel, Perpendicular, and so on. to edit the plan.

    To clear references, click the item in First Reference , and then click Delete.

  3. Select a Second Reference and a Third Reference as required to define the plan.

    The Message box indicates the status of the plan. The state of the plan must be Fully Constrained to be created.

  4. Click . 

    You can also press CTRL + drag an existing clip to create a new offset clip of the existing clip.

    To change the names of the construction plans in the current document, double-click, pausing between clicks, the plan name in the FeatureManager Design Tree and type a new name. When you create additional building plans, be sure to give them new names that indicate their purpose.

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A big thank you for your patience, I have finally been able to create this damn plan, which I was doing very badly.
I'm now able to create the V-shaped groove.
With all my thanks.

Hello

I'm coming to you because I think I have the same problem that mbrel34 encountered...
However, I can't seem to solve mine!

In my case, I have a volume (handling ear) from an extrusion (so far so good).
Under this extrusion, I want to round (to match the profile of a lifting eye).

However, it is impossible to do an extrusion of material by sweeping... The profile I give doesn't seem correct (on the other hand the "circular profile" option in the function works very well; look for the error).

I'll put you a screen of the problem, and a photo of the real part to better visualize.

PS: I managed to do what I wanted otherwise: with the Leave function... However, my piece is 120mm thick, and the ring has an Øint of 140mm... This forces me to do an extruded material removal at the end.

Do you have any idea why the swipe doesn't work?

Thank you in advance, and have a good day!
Matt.H


probleme_balayage.png

Unable to put 2 PCs in the same message


img_20200224_090201.jpg

And here is my default solution, using the fillet function (70mm radius) + extrusion to get back to the correct thickness of 120mm.


resolution_par_conge.png

@ Matt

Post your question about a new question

and you can post several images via the icon 

Top right a map with a mountain

@+

3 Likes

@Matt.H

We can't wait for you to create your new topic to be able to answer you with an idea where the pb comes from.

In your future new topic , remember to attach your piece, it will save us from having to redo it.

Kind regards

1 Like

Hello

Yes indeed, I should have created a new topic : here it is !

Thanks for the pictures, I didn't know.

Matt.H

1 Like