AnsweredAssumed Answered

Bend Lines are in the wrong position

Question asked by Fred Vraj on Mar 4, 2014
Latest reply on Mar 5, 2014 by Fred Vraj

Like • Show 0 Likes0
Comment • 7

Hi Guys,

please help if you can. I am creating a few flat patterns for to be laser cut but when we get all the part back and do the bending, we end up with very different position of our bends.

Laser cuts are correct, our bend guy is very good and always follows the bend linec correctly so it must be the position of my bend lines that are generated by SW.

How and where can I adjust how are all the bend lines positioned?

Please see my file in attach. ( PDF is what I am getting but the face with those 3 holes at the top comes up with different hole position.)

Thank you so much guys.

Fred

Attachments

BRACKET-RIGHT.SLDPRT.zip641.2 KB
BRACKET-RIGHT.pdf125.2 KB

No one else has this question

Outcomes

7 Replies

Anna Wood Mar 4, 2014 11:42 PM
Mark Correct
Correct Answer
Do you have the correct K-factors and bend deductions set in your SolidWorks model that will work with your tooling?

Check out this website for information on how to do test bends to calculate what your tooling needs. Be sure to read the pdf from the website.

http://www.ciri.org.nz/bendworks/

The BendWorks program will help as well.

If you have proper bend deductions set in SolidWorks you will get formed parts that meet print.

Cheers,

Anna
Like • Show 0 Likes0
Actions
- Fred Vraj @ Anna Wood on Mar 5, 2014 12:11 AM
  Mark Correct
  Correct Answer
  Hi Anna,
  thank you very much for your answer. I do believe that those are not set at all. I have taken over this SW and starting from scratch.
  I was hoping to have those figures already set but as far as I can see, it has not been done.
  I will read all the things that you re recommending and try to set this up. I will let you know if you don’t mind.
  I work with K0.5 and nothing else. No custom deductions and correct K factor that I could find.
  So do you think it could be the issue why are my bended parts different from the SW parts?
  Have a great day.
  Thank you so much again !!!!!
  Fred
  PS:Red Wings are great!
  Like • Show 0 Likes0
  Actions
  - Anna Wood @ Fred Vraj on Mar 5, 2014 12:43 AM
    Mark Correct
    Correct Answer
    Yes, that is why you are having issues. Bend deductions, bend allowances and k-factors must be set for your processes. Be sure to read the info on the site I referenced.
    
    Cheers,
    
    Anna
    Like • Show 0 Likes0
    Actions
    - Fred Vraj @ Anna Wood on Mar 5, 2014 5:41 AM
      Mark Correct
      Correct Answer
      Hi again Anna,
      can I only choose bend deductions or bend allowances or k-factors or do I have to set each of them for created part?
      I have been reading all the things recommended by you and they are very helpful.
      Also, after adding those parameters in ,will I see any changes immediately in the flat pattern?
      I have been trying to do some tests but flat pattern did not change at all.
      Thank you :-)
      Like • Show 0 Likes0
      Actions
      - Jerry Steiger @ Fred Vraj on Mar 5, 2014 4:29 PM
        Mark Correct
        Correct Answer
        Fred,
        
        Most people use either bend deductions or bend allowances or k-factors, not two or three of them.
        
        If you use the k-factor (my own personal favorite, as I don't do very many sheet metal parts), try setting the k-factor to 0.25 or 0.75. You should see a difference in your flat pattern when compared to the default 0.5.
        
        Jerry S.
        Like • Show 0 Likes0
        Actions
        Bernie Daraz @ Jerry Steiger on Mar 5, 2014 5:11 PM
        Mark Correct
        Correct Answer
        Jerry,
        
        Not to be argumentative but I use all of them as the need requires. On joggles I use an allowance from an epiracally tested chart, on regular bends a bend deduction and on radius bends I use an allowance when the radius exceeds what the chart has. These charts have been in use for the better part of 40 years in actual practice. My SolidWorks models go right to the punch or laser software without further editing. Post (layout the sheet) and run!
        Like • Show 0 Likes0
        Actions
        Fred Vraj @ Bernie Daraz on Mar 5, 2014 5:52 PM
        Mark Correct
        Correct Answer
        Hi guys,
        great to see all of your inputs. I really appreciate that. Thank you
        What I am going to do is to go to see my bend man and I will run some serious tests with different off-cuts of different thickness and material. I do believe that this old fashioned hand made testing is the best.
        I have to understand the floor work, not just the K,B,C or what ever factors SW generates itself.
        Please correct me if I am wrong. I have been doing CNC precision machining ( Turning and Milling ) for all my life so SHEET METAL work is something I need to learn.
        Plese see my attachment which is another question.
        Thank you again :-)
        Like • Show 0 Likes0
        Actions

Bend Lines are in the wrong position

Attachments

Outcomes

Related Content

Recommended Content