A cutting plane line consists of a thick line shown through an area adjacent to the visible "cut" to clarify what is seen inside an object. Connected to the end of the line are two perpendicular lines with arrows showing the direction of view.
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1. Top view is directly over the front view. 2. Side view is inline horizontally with either top view or front view. 3. A line parallel to a plane of projection will be projected on that plane as a line. 4. A surface parallel to a plane of projection will be projected on that plane 5. A line perpendicular to a plane of projection will be projected on that plane as a point. 6. A surface perpendicular to a plane of projection will be projected on that plane as line.
orthographics means line is perpendicular to the view plane,while oblique means line is not exactly perpendicular to the view plane.
A line Perpendicular to both H.P and V.P
Horizontal, vertical, diagonal, curved, patterned, contour, implied, actual?
A technical drawing will show all the surfaces that are to be modified, say for example by machining. The various views, like top, side and front are put on the page in a location such that if the page was folded the views would be in the correct location as if looking at the part through the walls of a glass box.The fold line is the line where you would fold the page to make the various drawing views come out in the proper location.The fold line is often a dashed line as long as the part with 2 long and 2 short dashes.A view can also be made of a surface (or plane) that is not right angles to the other views. This is helpful for a machinist setup where the part is mounted square to their cutting tools.No matter what drawing standards say, if the drawing is not clear for its intended purpose, it must be changed in any manner needed to make it clear.BuckBuckAutomation.com