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Section lines, or hatching, that represent the cut surface usually consist of thin parallel lines, as shown below, drawn at an angle of approximately 45° to the principal edges or axes of the part. For most purposes, the general use symbol of cast iron is used.
3 days ago · Draw the Section View: Create the outline of the object as it appears when cut by the section plane. Select the Section Line Pattern: Choose the appropriate pattern based on the material or feature. Apply Section Lines: Using a technical pen and triangle, carefully draw parallel lines at the chosen angle and spacing within the sectioned area.
- Cutting Plane. A surface cut by the saw in the drawing above is a cutting plane. Actually, it is an imaginary cutting plane taken through the object, since the object is imagined as being cut through at a desired location.
- Cutting Plane Line. A cutting plane is represented on a drawing by a cutting plane line. This is a heavy long-short-short-long kind of line terminated with arrows.
- Section Lining. The lines in the figure above, which look like saw marks, are called section lining. They are found on most sectional views, and indicate the surface which has been exposed by the cutting plane.
- Full Sections. When a cutting plane line passes entirely through an object, the resulting section is called a full section Fig. 7 illustrates a full section.
What is a section view? A sectional view or a section looks inside an object. Sections are used to clarify the interior construction of a part that can not 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.
- Full Sections. A Full section view is where the entire part or assembly is cut on a single plane. The generated section view that is created may form part of the same view as the reference view, permitted the correct projection method (first or third angled projection) is used.
- Half Section. The half section view may be used where a part or assembly is symmetrical about the centerline of the part or assembly. This will save space on the drawing with over population of reference and section views.
- Partial Section. A Partial section is used when only a certain portion of a part or assembly is cut in order to show important detail or geometry. The whole part or assembly is not sectioned as that may minimize the other information show.
- Revolved Section. A revolved section is a section that is made at a certain point in a part and revolved 90° to show the cross section of the part. The part can be broken to show the revolved section or the revolved section can be superimposed on the part itself.
If the position of the cutting plane is obvious, it does not have to be drawn. Edges and corners which intersect the cutting plane can be labeled to assist in the visualization of a orthographic section view. 8.2 CUTTING PLANE LINES.
Whether you’re an architect, engineer, or designer, understanding how to draw section lines accurately is crucial. This comprehensive guide will walk you through the process step-by-step, ensuring that you master this fundamental skill in AutoCAD.
