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Hidden lines appearing behind auxiliary views are usually not shown for clarity purposes. Auxiliary views are needed when a feature is foreshortened in one or more principal views. These include the true length (TL) line, edge view of a plane, inclined and oblique planes.
Do you show hidden lines in an auxiliary view?
Your instructor may ask you to show all hidden lines for visualization practice, especially if the auxiliary view of the entire object is shown. Later, when you are familiar with drawing auxiliary views, omit hidden lines when they do not add needed information to the drawing.
What views have hidden lines?
Hidden lines are used to show surfaces that are not directly visible. All surfaces must be shown in all views. If an edge or surface is blocked from view by another feature, it is drawn using a hidden line.
What is auxiliary view in drawing?
Auxiliary views are a type of orthographic projection used to determine the true size and shape of inclined and oblique surfaces of objects. • Normally, auxiliary views are projected from existing principal views. • However, auxiliary views can also be drawn first and then used to create a principal view.
How are hidden lines represented on a drawing?
It is standard practice to use dashes to represent any line of an object that is hidden from view.
What are hidden lines?
A hidden line, also known as a hidden object line is a medium weight line, made of short dashes about 1/8” long with 1/16”gaps, to show edges, surfaces and corners which cannot be seen. Sometimes they are used to make a drawing easier to understand. Often they are omitted in an isometric view.
Are there hidden lines in isometric drawings?
Usually only the visible surfaces of an object are drawn in isometric, with hidden lines left out. Although this is considered the preferred practice, there are always times when hidden lines are needed to clarify very complex isometric drawings.
What surface that needs an auxiliary view?
When an object has a slanted or inclined surface, it usually is not possible to show the inclined surface in an orthographic drawing without distortion. To present a more accurate description of any inclined surface, an additional view, known as an auxiliary view, is usually required.
Which type of line is used to draw hidden lines?
Type F. Hidden Lines (Thin) type lines consist of thin short dashes, closely and evenly spaced. These lines are drawn to represent hidden or invisible edges of the objects.
What are the six types of auxiliary view?
Auxiliary views are used to find: 1) true length of an inclined or oblique line; 2) true size and shape (TSS) of an inclined or oblique face 3) edge view of oblique face; 4) point view of inclined or oblique line; 5) true size and shape of features on incline or oblique faces.
When the auxiliary view is hinged from the top the view is called?
An auxiliary view hinged on a front view is called a front auxiliary view. You just studied 25 terms!.
When the auxiliary view shows only the foreshortened surface and not the entire object What is it called?
Width auxiliary view. Flashback: A surface that appears in all three standard multi-view views, and is foreshortened in all of those views, is called a/an: Oblique surface.
What is the purpose of hidden lines and centerlines?
Hidden lines show edges of details that are not visible from the point of view shown in the drawing. Center lines define the center of arcs, circles, or symmetrical parts.
What do hidden lines in orthographic projection do not?
Explanation: Explanation: Hidden lines denote those parts which cannot be seen when viewing the object.
What is a visible line?
Visible lines are the edges or “outlines” of an object. They are drawn as solid lines with a thick/heavy weight.
What do hidden lines represent on Multiview drawings?
would appear as hidden lines in an orthographic multiview drawing? These are the three views associated with the object you just built. Hidden lines are dashed lines used to represent internal features that are obscured by the object.
What are the lines used in drawing?
Using the Alphabet of Lines Construction Line. This line is used mainly in sketching, which is a freehand drawing technique. Visible Object line. This line is used to draw all the edges of the object. Hidden Object Line. Centre Line (or centreline) Extension Line. Dimension Line.
What are the three hidden views of isometric?
The term “isometric” is often mistakenly used to refer to axonometric projections, generally. There are, however, actually three types of axonometric projections: isometric, dimetric and oblique.
What is the basic difference between Centre line and hidden line?
In a scaled drawing, the hidden line can be measured from the start of the first dash, to the end of the last dash. Centre lines are drawn to indicate the exact centre of a component being drawn. They are made from a series of lighter long and short dashes.
How do isometric and isometric views differ in projection?
The isometric drawing is drawn using 100% true length measurements on the height, width, and depth axes. However, in isometric projections the height, width and depth are displayed at 82% of their true length. In isometric projections the object is first rotated about the Y axis by -45 degrees.
What is the principal reason for using an auxiliary view?
Auxiliary Views Allow Principal Faces Of Features That Are Parallel To The Standard Planes Of Projection To Appear True Shape And Size.
What are the types of auxiliary planes?
Auxiliary planes are of _______ types. Explanation: These are A.V.P (Auxiliary vertical plane) and A.I.P. (Auxiliary inclined plane). Auxiliary vertical plane is perpendicular to the H.P. and inclined to the V.P. projection on an A.V.P. is called auxiliary front plane.
Why sectional views are used in drawing?
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.
How many auxiliary planes are there?
There are three types of Primary Auxiliary View due to three principal planes as follows: i. Front Auxiliary View. ii.
What do you call an auxiliary view that has been projected from a primary auxiliary view?
A view projected from a primary auxiliary view is called a. front auxiliary view. An auxiliary view hinged on a front view is called a. auxiliary plane.
How are auxiliary planes classified?
Auxiliary Plane The plane which we draw to get the true shape of the inclined surface ( often parallel to Principal Plane ) is an auxiliary plane. Simply, the plane other than the Principal Plane ( i.e. Horizontal Plane, Vertical Plane or Perpendicular Plane) is called Auxiliary Plane.
