Drawing Section View Rules
Figure 20 front view and half section.
Drawing section view rules. A section or cross section is a view generated from a part or assembly on a cutting plane or multiple cutting planes that reveals the outlines on the inside or assembly fits. Be aware that the view may not be orthogonally aligned to the plane from which it is shown depending on space on the drawing but the view should represent looking in the direction of the arrows. Sometimes it is necessary to cut a part or assembly to reveal geometry or fits on the inside of a part or assembly.
When sketching an object or part that requires a sectional view they are drawn by eye at an angle of approximately 45 degrees and are spaced about 1 8 apart. When the revolved view is superimposed on the part the original lines of the part behind the section are deleted. A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object.
These lines are called section lining or cross hatching. Visible edges and contours behind the cutting plane should be shown as below in fig. Uncategorized by engineering drawing basics.
All views of the drawing must be grouped together and arranged on the sheet s without wasting space preferably in an upright position clearly separated from one another and must not be included in the sheets containing the specifications claims or abstract. The lines are thin and are usually drawn at a 45 degree angle to the major outline of the object. The views may be plan elevation section or perspective views.
The arrows should point in the direction you are looking. The diagonal lines on the section drawing are used to indicate the area that has been theoretically cut. Sections and section views on engineering drawings.
A if the revolved section view does not interfere or create confusion on the view then the revolved section is drawn directly on the view using visible lines. The completed drawing is shown below. The cut line is called a cutting plane and can be done in several ways.