Request for Recommended Approaches for Determining Projection Type in Engineering Drawings 2

[Jupshaw]

Dear Engineer's,
I'm reaching out to seek your expertise on a challenge I've encountered in interpreting certain engineering drawings.

In some instances, I've come across drawings where the projection type (first or third angle) is not explicitly mentioned in the drawing or accompanying notes. To address this issue, I've been employing a workaround by redrawing an established view in Solidworks 2D. By manipulating the drawing, I can visually confirm which oriented view aligns with the original drawing.

While this method has proven helpful, I'm curious if you or your team have encountered similar situations and devised alternative approaches to confirm projection type. I'm particularly interested in learning about any methods that may provide more definitive results or streamline the process.

If you have any insights or recommendations to share, I would greatly appreciate your input. Your expertise in this matter would be invaluable in enhancing our approach to interpreting engineering drawings effectively.

Jay.

 

[3DDave]

As jassco already posted "But angle of project block is required per ASME Y14.1M." In turn it refers to Y14.3.

It doesn't appear to say it is required.

10 ADDITIONAL DATA BLOCKS
Blocks containing various types of additional data,
when required, shall be added adjacent to the title block
and in the same respective location on all drawing sheets.
When drawing size restricts placement of optional
block(s), the block(s) may be located where space permits.
The following subparagraphs identify several commonly used blocks.
Additional blocks may be added when required.

10.1 Angle of Projection Block
The angle of projection symbol will be as illustrated
in ASME Y14.3. See Fig. 10-1 for an example of a third
angle projection block. See Figs. 4-1 and 4-2 for its location
within the title block. Optionally the symbol may
be located near or adjacent to the title block in lieu of
within the title block

It does not appear to explicitly require it, as other requirements include the word "shall" and this doesn't, just that it is commonly used. If it is used, there is a requirement to conform to a particular depiction.

Notably many examples of orthographic projection in Y14.3 include trimetric views.

 

[Wuzhee]

People can overlook the cone symbol very easily

I second that. As they can overlook the entire title block easily as I've experienced countless times.
I could state whatever requirement I'd like in notes and title blocks, most of the contractors only looked for the part no. in the blocks.

 

[Burunduk]

The cone symbol can be large and bold, placed at a visible and clean place on the drawing sheet.

 

[CheckerHater]

I drew the third-angle cone on the sketch and immediately got a big smile and thumbs-up from the foreman, and got my part a few hours later.

I apologize, I must be in the Friday mood

MJ, your story just reminded me the one from my old teacher (The following are his words from first person):

“In 1945 our company was stationed in Germany. Logistics were complicated.
One day I needed to repair the vehicle ASAP.
I made a drawing with the piece of chalk on the garage door.
Then I pointed mechanic to the drawing: “Verstehen?”
Then I pointed to my wristwatch and showed him 2 fingers: “Verstehen?”
Then I stroked my holster: “Verstehen?”
In 2 hours the part was ready, and this proves that engineering drawing is universal language.
The end.”

("company" as a military unit, not business)


"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future

 

[ctopher]

This is from our templates. I have used this on dwgs at every company I have been at for past 40 years.
Check out ASTM Y14.3

Chris, CSWP
SolidWorks
ctophers home

 

[3DDave]

ASME Y14.3 specifies the size of the cone symbol in terms of the height of text on the drawing.