Jump to content

What am I missing?


Jimbo720

Recommended Posts

It's not a very complicated part, but i'm not sure how to draw the angles in the front view on surface C. I know obviously they start .5 down from the top but I don't know how far down towards that cutaway it goes. This is using 2D AutoCAD.

20181121_210139.jpg

Edited by Jimbo720
Link to comment
Share on other sites

Thank you for your help! I need to stop always thinking I need to draw front, top, right side then auxiliary. So, when it says for the next auxiliary view to show true angle between surfaces A and C wouldn't a left side view do that? 

 

Link to comment
Share on other sites

10 hours ago, Jimbo720 said:

Thank you for your help! I need to stop always thinking I need to draw front, top, right side then auxiliary. So, when it says for the next auxiliary view to show true angle between surfaces A and C wouldn't a left side view do that? 

 

If two infinite flat planes are not parallel their intersection will be a straight line.  To measure the angle between them you would measure it in a plane perpendicular to this line of intersection. Another way to picture the angle is to create a view where you are looking down the line of intersection making the line appear as a dot.   An auxiliary view looking down this line is what you want.  The left view does not provide this. 

 

 

In my previous post the cyan line lies on both plane A and plane C thus it is collinear with the line of intersection of the two planes.  To determine the angle between these two planes create an auxiliary projected in the direction of the cyan line (up and to the left). It will be a view looking down the cyan line where you can measure the angle between the two planes.  Do you know how to create this auxiliary view? 

Link to comment
Share on other sites

For this drawing do I need to create an auxiliary view to get those angles in the front view? They look parallel but I don't wanna just assume that.

Thanks again!

20181123_212011.jpg

Link to comment
Share on other sites

The 3 diagonal lines in the front view are due to the edges formed by the oblique plane meeting three different vertical (and parallel) planes.  Therefore the lines are parallel.  You are asked to create a primary and secondary auxiliary view so that you can view the oblique plane in true shape. The primary auxiliary view will be project in the direction of one of the diagonals yielding an edge view of the plane.  A projection off that view will give you the oblique plane in true shape.

 

BTW, If you are starting a new topic you should start a new thread.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...