5 ms·

The chamfer in the detail is wrong in your model. Section A-A is what you would see if you sliced the part along the dotted line and see it from the direction

The chamfer in the detail is wrong in your model. Section A-A is what you would see if you sliced the part along the dotted line and see it from the direction indicated by the arrows. If you cut your part along A-A you would see a rectangle, not a trapezoid. https://imgur.com/moJzOiw https://imgur.com/moJzOiw edit: did my own model and added a picture for reference :)

jacquesm 8y ago
You're correct. The shape of the tool is the way it is so it doesn't get wedged at the bottom of the seal groove. The part in contact with the old seal is about as wide as the seal, the part in contact with the seal groove is narrower, as it should be. The tool as shaped by the OP would get wedged between grime and fragments of the old seal or might cut the old seal because of the too narrow point that only contacts the old seal in the middle or on either edge.
- incanus77 8y ago
  FWIW, the seal I had to pull (the PS pump one, not the one mentioned in the original blueprint) has space behind it for a good catch, so I didn’t run into any problems with the tool as I made it. Lucky, I guess :)
- choonway 8y ago
  ebay listing of the original part with closeup pictures. :) https://www.ebay.de/itm/1x-Spezial-Werkzeug-VW-Hebel-fuer-Dichtung-VW-681-Original-ex-BW-Bundeswehr-VW1-/362219167704 https://www.ebay.de/itm/1x-Spezial-Werkzeug-VW-Hebel-fuer-Di...
incanus77 8y ago
Ah! This makes sense, thanks. I will fix & update the post. I guess the placement & orientation of the cross-section hints at this.
- deleted 8y ago
  [deleted]
incanus77 8y ago
So here's a puzzler... I think you are backwards. Based on what I've seen [1][2], the arrows show the direction of sight, so the part would taper towards the inside of the hook. It's not clear how this would be gradual, either, i.e. tapering in two dimensions, so the drop-off would be sudden. I'm still trying to figure this out. [1] http://www.me.umn.edu/courses/me2011/handouts/drawing/blanco-tutorial.html#xsection http://www.me.umn.edu/courses/me2011/handouts/drawing/blanco... [2] http://web.aeromech.usyd.edu.au/ENGG1960/Documents/Week12/Engineering%20Drawings%20Lecture%20Sectioning.pdf http://web.aeromech.usyd.edu.au/ENGG1960/Documents/Week12/En...
- choonway 8y ago
  The original 2D drawings are in first angle projection (inferred). The drawings in your links are third angle (also inferred). This will affect the placement of the section view, but will not change how the section view looks like. i.e. in 3rd angle projection, the section view would be on top and not at the bottom of the parent view. Hopes this helps to clean up some of the confusion. The alignment of the section view is off as well. It should be aligned with the parent view: https://imgur.com/AZ9iHW9 https://imgur.com/AZ9iHW9
- choonway 8y ago
  my model on thingiverse: https://www.thingiverse.com/thing:3492946 https://www.thingiverse.com/thing:3492946 I wanted to publish it earlier but had to wait a day before I could publish it

jacquesm 8y ago

You're correct. The shape of the tool is the way it is so it doesn't get wedged at the bottom of the seal groove. The part in contact with the old seal is about as wide as the seal, the part in contact with the seal groove is narrower, as it should be. The tool as shaped by the OP would get wedged between grime and fragments of the old seal or might cut the old seal because of the too narrow point that only contacts the old seal in the middle or on either edge.

incanus77 8y ago
FWIW, the seal I had to pull (the PS pump one, not the one mentioned in the original blueprint) has space behind it for a good catch, so I didn’t run into any problems with the tool as I made it. Lucky, I guess :)
choonway 8y ago
ebay listing of the original part with closeup pictures. :) https://www.ebay.de/itm/1x-Spezial-Werkzeug-VW-Hebel-fuer-Dichtung-VW-681-Original-ex-BW-Bundeswehr-VW1-/362219167704 https://www.ebay.de/itm/1x-Spezial-Werkzeug-VW-Hebel-fuer-Di...

incanus77 8y ago

Ah! This makes sense, thanks. I will fix & update the post. I guess the placement & orientation of the cross-section hints at this.

deleted 8y ago
[deleted]

incanus77 8y ago

So here's a puzzler... I think you are backwards. Based on what I've seen [1][2], the arrows show the direction of sight, so the part would taper towards the inside of the hook. It's not clear how this would be gradual, either, i.e. tapering in two dimensions, so the drop-off would be sudden. I'm still trying to figure this out. [1] http://www.me.umn.edu/courses/me2011/handouts/drawing/blanco-tutorial.html#xsection http://www.me.umn.edu/courses/me2011/handouts/drawing/blanco... [2] http://web.aeromech.usyd.edu.au/ENGG1960/Documents/Week12/Engineering%20Drawings%20Lecture%20Sectioning.pdf http://web.aeromech.usyd.edu.au/ENGG1960/Documents/Week12/En...

choonway 8y ago
The original 2D drawings are in first angle projection (inferred). The drawings in your links are third angle (also inferred). This will affect the placement of the section view, but will not change how the section view looks like. i.e. in 3rd angle projection, the section view would be on top and not at the bottom of the parent view. Hopes this helps to clean up some of the confusion. The alignment of the section view is off as well. It should be aligned with the parent view: https://imgur.com/AZ9iHW9 https://imgur.com/AZ9iHW9
choonway 8y ago
my model on thingiverse: https://www.thingiverse.com/thing:3492946 https://www.thingiverse.com/thing:3492946 I wanted to publish it earlier but had to wait a day before I could publish it