And now for the Turny Thingy

  The Huntsville SE Summit will start for me this coming Tuesday and I don’t know what to expect except that I am attending with a real sense of gratitude. Who could have guessed two years ago that the philosophy of  UGS/Solidedge/Siemens would take such a profoundly beneficial turn for the better.  I expect to have GOOD things to report in the upcoming week. But in the mean time we have——-

   Here today is the finish of the valve where we create the little turning thing for the middle as what would a valve be without a turny thingy ;-). 

   This is an imported assembly .stp file and will be opened as an assemply file in SE. The important considerations here are that it matches the new valve body length. I know the open section must be 3.6″.  There are two o-rings and each o-ring groove is .26″ wide. The body is 6″ long therefore 6″ – 3.6″ – .26″x 2 = 1.88″ and 1/4 of this or .47″ determines the length of each full diameter section on both sides of the o-ring groove and a .375″ radius on the spool cutout corners to match the body.

   The geometry needed to have the spool and the valve work right with a degree of rotation that can be accomplished by an air cylinder stroke from one side were the critical dimensions of both parts needed to make this work right. The proven design adaption easily accomplished with ST means I avoid all kinds history based and calculation steps required to make this work.

   Importing this file as an assembly meant that when I altered the valve spool all the dependencies have to be redone. So I delete the relationships in the parts listings and recreate the assembly constraints to match the new part.

   Can you see why I like this stuff so much?

  Now here is a thought to ponder. Is it  potatoe or potato. Is it turney or turny. Something serious to think about.

                                                                             Dave Ault

3 responses to “And now for the Turny Thingy

  1. Something to blow your mind further and save on a ton of clicks. I would recommend using the Assembly Relationship Assistant (ARA) before you edited the spool body. Run ARA from the Home tab, Relate group right after you imported the STEP assembly. The ARA has quite a few settings on the options dialog but here’s what I would suggest: Check select set 1 against itself, remove relationships & grounded relations.

    Hit ok and fence all the parts in the assembly and hit the green check to accept. You will see the settings that lets you control what relations are found. Take the defaults (mate, align, axial, allow offsets) and hit process. You should see a list of relations that SE found based on geometric matching. You can keep all or uncheck those that you don’t want and Accept to finish. Your model should have the relations that you created by hand.

    Now, go do your sync edits to the spool. Close and return to the assembly and your parts should have updated to new positions.

  2. Just getting back in from Huntsville so replies have been a bit slow. Yeah it was pointed out to me by a few others also. I appreciate you taking the time to tell me as I know I don’t know it all for sure.

    This is a general comment to all readers here. There is value in your knowledge of SE and when you can contribute to this you provide a service to me and I bet a bunch of others with the same questions or problems. You are wellcome, no let me rephrase that, I really want your contributions in this area.

    Tip of the hat to you Aditya!

  3. You are most welcome, and you bet I’ll add your blog to my various hang outs online.

    I saw you at the ST4 Launch Event talking to a few folks in a group, but I never got a chance to meet up with you after that. May be we’ll meet at the next one. The event sure was a lot of fun for us here.

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