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Pump Volute Modeling

T

tewaryshashi

New member
Hello,


I have got an urgent assignment for making a horizontal split case pump. I have got stuck in modeling the volute (delivery side).I have tried swept blend (with blend vertex as no. of entities are different), but the feature fails to regenerate. Rotational blend does not give the desired reusult, as i need the blend along specified path. I am attaching the image as well as the .prt file.


If somebody has come across a similar project, please help me.


Regards





2007-11-18_131434_body_.prt.rar





View attachment 4452
 
You can use a swept blend to sweep along a datum curve, but at the end of your volute the geometry will wrap around on itself. You will have to stop the datum curve before it does and then do a swpt blend to complete.
 
thanks for the reply, I will try it out.I need one more help. i just cannot locate the 'sketch datum curve' icon in the datum toolbar, neither in the 'insert' menu. I am using Wildfire 2.0.


Regards
 
tewaryshashi


Use sketch>data from file>file system and browse to the sketch you need.


Sip
 
Thanks bcooper & thanks sip, by file system you mean the file type (.igs,etc...)


but my problem remains unsolved. I am attaching the part file. I have got some success. My problem is that, if I use the sketched curves for swept blend, then no feature gets created because of diffrence in no. of entities. If I use blend vertex, still the feature fails.


My problem is partially solved, if I create 2 datum curves with the help of the 2 sketches for making the volute section. But the datum curves created are not exact replicas of the desired volute sketches. That is why I am looking for the 'sketch datum curve' command as available in 2001. My problem will be solved if I can make behave the 2 volute sketches as single entity at a time while defining the sections for swept blend. I am exactly looking for the following
Choose Insert > Model Datum > Sketched Curve or click the <?:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /></v:stroke></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:f></v:ulas></v:path><?:namespace prefix = o ns = "urn:schemas-microsoft-com:eek:ffice:eek:ffice" /><o:lock aspectratio="t" v:ext="edit"></o:lock></v:shape></v:image></v:shape>button on the Datum toolbar. The Sketch dialog box opens with the Placement tab active.
OR
To activate the Sketch Datum Curve tool, click the button in the Datum toolbar.


for some reason, the button icon is not getting dispalyed. I am attaching a word file to make the path clearer.2007-11-20_122802_skt_dtm_curv.rar





Incase you have a better method to create or if you could create the feature and share the prt file, please let me know.


regards


2007-11-20_121829_body_1.prt.rar
 
there are 8 sections in total for delivery side. I have jus created the first 2. look at the pics below. The 2 sections (in light blue shade) are the actuall sections. But if i use them then the feature resolves, inspite of using blend vertex.


The 2 sections (in dark blue) have been created using datum curve thru points. If I use these 2, the feature gets created, but the shape of the sections are not correct.
 
I don't quite get the need for the vey slight differences in the sections. Am I missing something?


Sip
 
well, the light blue ones have been created using the dimensions from dwg file. so this is the correct section of the volute to be used for manufacturing. These 2 sections have diffrent no. of entities as well (15 for lower and 13 for upper). even after using belend vertex, the feature fails to create.


The dark blue ones have been created by me using datum curve thru points. Since these sections behave as single entity during swept blend, the feature gets created. but the problem is, the dark blue sections cannot be used for manufacturing.


so, I am looking for a way where I can make the sections behave as one entity and at the same time the sectionscan be used for manufacturing


regards
 
ok,


please let me know if you mind when I send PMs. the idea is reduce time lag. If you are ok, please let me know. sorry, if you mind
 
2007-11-21_082532_body_1.prt.zip


Your curves thru points don't match the original curves because there are non-tangent entities in them.


See if you can fill in the sides later.


As for the differnt amount of entitiesin the sections. 2007-11-21_083529_prt0001.prt.zipI put in a point and split the curves on two entities.


You have to experiment with the problem of the section normals, but this may get you underway.


Good luck


Sip
 
thanks,


i am trying right now. I had tried splitting the curve earlier, but had no success. I will try your solution. If you are online, please wait. I will reply shortly



Edited by: tewaryshashi
 
Sorry. I'm on WF3


When you're in the 13 entity sketch, try to put a point about halfway on on of the entities. Then trim using the View attachment 4471button. Do that on both sides.


Add a center line so you can add symmetry. I hope that works for you.


I'd better get to work here.


Sip
 
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