(Engineering drawing-) a very typical ques., please solve it

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Discussion Overview

The discussion revolves around the engineering drawing of a circular disc with specific dimensions and orientations in relation to horizontal and vertical planes. Participants are seeking guidance on how to represent the projections of the disc, including the steps involved in creating the top and front views.

Discussion Character

  • Homework-related
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant requests a step-by-step guide to draw the projections of a circular disc inclined at specific angles to the horizontal and vertical planes.
  • Another participant questions the method of drawing, asking whether it should be done manually or using software, and notes that the projection will be an ellipse.
  • A participant expresses uncertainty about which view to draw first and suggests that the views will be ellipses, seeking clarification on the construction steps on an orthographic sheet.
  • A later reply shares a visual representation of ellipses but indicates limited ability to provide detailed steps, referencing their past experience with engineering drawing.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the specific steps to take for the drawing, and multiple viewpoints regarding the method and order of drawing remain present.

Contextual Notes

There is uncertainty regarding the assumptions needed for the drawing process, such as the initial orientation of the disc and the reference planes involved. The discussion also highlights a lack of clarity on whether to use traditional drawing methods or software.

Who May Find This Useful

Individuals interested in engineering drawing techniques, particularly students or professionals seeking to understand projection methods and the representation of inclined objects in orthographic views.

gemini2345
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Draw the projections of a circular disc having diameter AB = 70mm with end A of diameter in Horizontal plane and end B in vertical plane .The circular disc is inclined to vertical plane at 60o and to horizontal plane at 30o.

Please tell me the steps to draw it and if posible , show me the completed diagram.



Thank you
 
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What is the context of your question? Are you to do it the "old fashioned way" with french curves or with some computer program or what? You probably know the projection will be an ellipse, right? Or is that your question?
 
By projections , i mean the top view and front view.
-I don't know which view to draw first?
Whether it will be top view or front view or side view.
-I need it to be done in a way that includes XY reference line with front view above XY line and top view below XY line.
It will be easier to you to show if you draw it as a autocad drawing or in any other software you like.
-I can imagine that views will be ellipse but what are the steps of construction we will follow while drawing this on orthographic sheet?
Will we assume it to be parallel to one of the reference plane in first step and then start tilting its views in next steps?




Thank you
 
Not sure how much help I can be on the steps you need to use. I took engineering drawing back in the 50's :rolleyes:. Best I can do is show you the following picture. Maybe someone else can jump in. The red and blue ellipses are what you want, I think. The black ellipse is the circular disk, which also looks like an ellipse from this angle.

forumellipses.jpg
 

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