A sectional view or a section
looks inside an object
. Sections are used to clarify the interior construction of a part that cannot be clearly described by hidden lines in exterior views. By taking an imaginary cut through the object and removing a portion, the inside features may be seen more clearly.
Is the cutting plane line shown?
The line that separates the different types (interior and exterior) may be a center line or a visible line. Used to show parts and features that do not line up with each other. Cutting-plane
line does not travel in a
straight line. The offsets or bends in the cutting-plane line do not show in the section.
Do sectional views show cutting planes?
Sectional views often replace standard views
. As figures shown, the cutting plane is a frontal plane and appears as a line in the top view. The arrows at the ends of cutting-plane line point in the direction of sight for front section.
What type of view requires a cutting plane?
To produce
a sectional view
, a cutting plane is assumed to pass through the part. The cutting plane is then removed, and the two halves are drawn apart, exposing the interior construction. In which case, the direction of sight is towards one half of the object. The other half is then mentally discarded.
What is the purpose of a cutting plane line associated with a section view?
Why are cutting plane lines used?
to indicate where a section of an object is taken
.
What are the 7 types of section views?
There are a number of different types of sectional views that can be drawn. A few of the more common ones are:
full sections, half sections, broken sections, rotated or revolved sections, removed sections, offset sections, and assembly sections
.
Section views do not include hidden lines
. Any material cut when a section view is defined is hatched using section lines. There are many different styles of hatching, but the general style is evenly spaced 45° lines.
What are the different types of cutting planes?
- Vertical Section Plane.
- Horizontal Section Plane Cutting plane parallel to horizontal plane.
- Profile Section Plane.
- Auxiliary Section Plane.
- Oblique Section Plane.
Why is a hole on an object not given section lines?
Notice that the square hole in the object has no section lining,
since it was not changed by sectioning
. Section lines are very light. 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.
What are the six section views?
- Full sections. …
- Half sections or views. …
- Offset sections or views. …
- Broken out sections or broken views. …
- Revolving sections or view. …
- Removed sections.
What is a section cutting line?
Section Lines:
Used to indicate where the cutting plane cuts the material
. Section lines are thin and the symbols (type of lines) are chosen according to the material of the object. Section lines are generally drawn at a 45° angle.
What is a phantom line?
Lines that are
made visible as dots or dashes to reveal the edges of objects currently hidden from view
.
What is a section line in drafting?
Section Lines:
Used to indicate where the cutting plane cuts the material
. Section lines are thin and the symbols (type of lines) are chosen according to the material of the object. Section lines are generally drawn at a 45° angle.
What is isometric view?
In computer graphics, a rendering of a 3D object that eliminates the distortion of shape created by true perspective. In isometric views,
all lines on each axis are parallel to each other, and the lines do not converge.
What is a removed section view?
So, what is it? The removed section view is
a zero-thickness slice through the model showing only cut edges and hatching perpendicular to the cutting line
. That's different than the traditional section view, which is projected parallel to the cutting line.
When two different parts are adjacent to each other then the section line is drawn at an angle?
Explanation: When two different parts are adjacent to each other, then the section line is drawn at an
angle 45° and 135°
. If one part is hatched at an angle 45° then the second object section line drawn at an angle 135° from horizontal.
