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Surgical Blade Design

Surgical Blade Design

Surgical Blade Design

(OP)
Im having trouble designing this surgical blade to the specified dimensions.  I tried importing the picture as a shetch and tracing the profile of the blade, but the image is 4:1 scale, so when I apply the correct dimensions the sketch blows up.  Please advise.

I have another file that details the dimensions of the slot.

http://files.engineering.com/getfile.aspx?folder=aa164724-59ba-438d-97c9-2c437eabdc4d&file=blade_template.png

RE: Surgical Blade Design

Adjust the size/scale of the sketch to suit the known dimensions, and then trace and dimension the outline.

RE: Surgical Blade Design

(OP)
I need it as close to exact as possible.  I've tried to complete it a few times and am still having trouble.

RE: Surgical Blade Design

Reverse engineer in reverse. Instead of tracing over the 4:1 picture, model per the picture, then print out your model at 4:1 scale and overlay the print-out on the picture. Tweak as needed.

Diego

RE: Surgical Blade Design

Start a new sketch
Draw a horizontal construction line 40.96mm long (O?A length of blade)
Draw vertical construction lines at each end of the horiz line to create an H
Go to Insert > Sketch Picture and select the blade_template.png image
Re-size, rotate and move the image to fit within the H (Close-cropping the image beforehand will make this easier)
Trace and dimension the outline
The slot can be drawn and placed accurately from the given dimensions

RE: Surgical Blade Design

I would just add an additional pointer (addition to what CorBlimeyLimey suggested): start the drawing (construction line) at origin. The "sketch picture" always tries to make a coincident between the origin and the left lower corner of the imported image.  

http://www.storyofstuff.org/

RE: Surgical Blade Design

3DContent Central has a 'surgical blade' with the slot done for you.

"the rest is left as an exercise for the student"

--
Hardie "Crashj" Johnson
SW 2011 SP 4.0
HP Pavillion Elite HPE
W7 Pro, Nvidia Quaddro FX580

 

RE: Surgical Blade Design

Trace 'round it, dimension as per your drawing then scale the part x4?

RE: Surgical Blade Design

Quote:

Trace 'round it, dimension as per your drawing then scale the part x4?

How is this better than scaling the image to start?

RE: Surgical Blade Design

From what was said in the first post, I think he has already traced and drawn the part, but is trying to then apply dimensions to scale it.

Rather than do it that way round, I think scaling the part he has already drawn would save the extra work of scaling the drawing (and therefore possibly adding further inaccuracy?) then re-doing the tracing part of the task.

Not necessarily better, but possibly, and just another suggestion.

RE: Surgical Blade Design

(OP)
I scaled and rotated the picture of the blade then traced it.  The dimensions are not exact, but they are close.  Hopefully close is sufficient for meeting manufacturing requirements.

Thanks, all!

RE: Surgical Blade Design

battlehands,

It sounds like you are trying to manufacture a blade by reverse engineering it from a competitor's brochure.  Are you trying to do this or something like it?

- - -Updraft

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