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by Fra88
Fri Dec 20, 2019 5:54 am
Forum: Help on using FreeCAD
Topic: Sheet Metal Workbench
Replies: 232
Views: 39401

Re: Sheet Metal Workbench

Cool!! What about k_factor?
by Fra88
Thu Dec 19, 2019 5:58 pm
Forum: Help on using FreeCAD
Topic: Sheet Metal Workbench
Replies: 232
Views: 39401

Re: Sheet Metal Workbench

Dear all, good evening. I'm trying to model the corner fo a Sheet Metal panel and I would like to obtain a semispherical corner. I made a lot of trials, using also commands from other WB (part, part design,...). At the end I was able to create the geometry described in the file attached (I used sufa...
by Fra88
Thu Dec 19, 2019 5:40 pm
Forum: Forum Italiano
Topic: Modellazione raggi
Replies: 3
Views: 251

Re: Modellazione raggi

@carlopav grazie per l'indicazione, prover├▓ a chiedere anche nel toppic dedicato @renatorivo diciamo che non volevo ottenere proprio una sfera, ma una sfera aprossimata (da produrre con piegatura). L'idea iniziale era quella di allungare i raggi delle pieghe e modellarli (tagliarli su misura) per ot...
by Fra88
Tue Dec 17, 2019 6:16 pm
Forum: Forum Italiano
Topic: Modellazione raggi
Replies: 3
Views: 251

Modellazione raggi

Buona sera a tutto il gruppo. Sto cercando di modellare i raggi di piega in ambiente sheet metal, per ottenere uno spigolo a "sfera". Ho fatto vari tentativi cercando di usare anche i comandi degli altri ambienti. Alla fine sono riuscito ad ottenere una geometria simile a quella che avevo in mete (m...
by Fra88
Thu Oct 17, 2019 8:16 pm
Forum: Help on using FreeCAD
Topic: [SOLVED] Wrong sheet metal unfold dimensions?
Replies: 7
Views: 564

Re: [SOLVED] Wrong sheet metal unfold dimensions?

Look at Page 7, picture 8.
by Fra88
Thu Oct 17, 2019 8:08 pm
Forum: Help on using FreeCAD
Topic: [SOLVED] Wrong sheet metal unfold dimensions?
Replies: 7
Views: 564

Re: [SOLVED] Wrong sheet metal unfold dimensions?

I think that dipend on the definition of Kf. In "my" formula Is defined as the ratio between neutral axes position taken from internal bend (t) and tickness: Kf=t/T. I have found this definition in the file attached (i'm sorry It is in italian language). In this file neutral factor Is indicated with...
by Fra88
Thu Oct 17, 2019 7:37 pm
Forum: Help on using FreeCAD
Topic: [SOLVED] Wrong sheet metal unfold dimensions?
Replies: 7
Views: 564

Re: Wrong sheet metal unfold dimensions?

Dear chrisb, thank you for your reply.
Yes you are right!!!
Sorry for my big mistake :oops: :oops:
by Fra88
Thu Oct 17, 2019 6:23 pm
Forum: Help on using FreeCAD
Topic: [SOLVED] Wrong sheet metal unfold dimensions?
Replies: 7
Views: 564

Re: Wrong sheet metal unfold dimensions?

Sorry there is a mistak in the formula.
The correct one is:

L1+L2+(Ri+Kf*T)*pi/4=98+98+(1+0,5*1)*pi/4=197,178mm
where L1 and L2 are the lenght of the straight plates, T=thikness, Kf=neutral factor, pi=3,14..., Ri=internal bend radius
by Fra88
Thu Oct 17, 2019 4:41 pm
Forum: Help on using FreeCAD
Topic: [SOLVED] Wrong sheet metal unfold dimensions?
Replies: 7
Views: 564

[SOLVED] Wrong sheet metal unfold dimensions?

Hello, I'm making some tests with the module sheet metal. I made a simple bend with this parameters: - sheet metal thickness= 1mm - internal bend radius= 1mm - bend configuration: 90┬░ bend with Kfactor=0,5 other dimension are summarized on picture and FC file attached. When I use the unfold command,...
by Fra88
Fri Mar 01, 2019 7:06 pm
Forum: Open discussion
Topic: SheetMetal Radius and Kfactor
Replies: 1
Views: 398

SheetMetal Radius and Kfactor

Dear all. Hello and thank you for developing freeCAD every day for us. I'm Mechanical Engineer and I use FreeCAD at home for some small projects. Sometimes I need to make parts in bended sheet metal, so I use sheet metal workbench. I have a problem: every time that I make a bend, I have to change in...

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