How to model a sine wave(using parametric equations) on a knife or hacksaw using Creo???

U can use equation curve

Use sweep with a relation in the section

Good work @ BH Ooi, can you please help me??? How to keep sine wave serrations on the edge of white portion in the attachment below???

See the attached PPT file. I have also attached the Creo2 file for your reference. Hope this helps.

BH Ooi, Can you please help me how to select the marked red colour edge(below attachment) as the reference for drawing sine curve just like how you have drawn for knife, please.....

I am still on Creo2. as such I am unable to open your prt file. Could you please send me the creo2 version, or IGES/STEP file? Thanks

Sir, as per your requirement im sending you .step file as well as .iges

Ok, the main issue here is the selection of the trajectory. I approached this via silhouette edge of the impeller geometry. See the attached files.

Thank you sir, I was unable to select the edge as an origin in sweep option, moreover, I couldn't understand why you have selected copy and trim options so if possible could you please explain me why you have used copy and trim options as well as how to select the edge as an origin. Screenshot 3 is showing how wrongly I selected edge.

A couple of points on the trajectory selection:

1. The edge must the outermost point along the end surface of impeller.
2. I used the silhouette edge to create the trajectory.
3. To select No.2, I made use of the trim function that has the silhouette option. I created a copied surface for this purpose as the function only allows surface trimming, not on solid
4. Once the copied surface is trimmed, its trimmed edges will be the sweep trajectory

Sir, i have tried my best to select the end edge of the impeller, but instead of end edge some other is getting selected and the material is getting removed as shown in below attachments. Im not understanding where i have done mistake in selecting the correct edge. Thank You

Hi, you can just follow exactly I did in the creo2 file I attached earlier. To select the edge, just temporarily hide the solid and leave that copied surface(after trimmed) visible. You need to select the trimmed edge of that copied surface, not anything else.

Sir, can you please check where did I do mistake...

Hi, I can't open Creo3 file as I am still running on Creo2. Not able to see much from the step file. If you want, you can private message me your contact and I will try to contact you. Thanks

Sir, I'm attaching creo 2.0 file, can you please check where i did mistake

OK, I can see the problem now and I have fixed it for you. See the attached files.

OK, this has magnitude of 2.5 and 7 turns