Presentation on theme: "OBLIQUE VIEWS Oblique drawings provide a quick way to sketch an object and represent the three dimensions of height, width and depth. Oblique drawings."— Presentation transcript:
OBLIQUE VIEWS Oblique drawings provide a quick way to sketch an object and represent the three dimensions of height, width and depth. Oblique drawings have only one receding axis. This axis can be drawn at any angle, but is typically drawn at a 30° or 45° angle.
Cavalier Oblique Cavalier oblique drawings transfer the depth measurement from the orthographic projection directly to the receding axis in the oblique drawing. For an illustration, begin with the orthographic views of the object.
Cavalier Oblique – Step 1 Step 1 - The overall rectangular shape is drawn with the depth measurement placed along the receding axis.
Cavalier Oblique – Step 2 Step 2 - The rectangle or notch on the right hand side is drawn to show where the corner has been removed.
Cavalier Oblique – Step 3 Step 3 - The rectangular notch on the upper left front corner is drawn.
Cavalier Oblique – Step 4 Step 4 - The inclined surface on the upper right rear edge is located by marking the corners of the inclined surface and then connecting those corners to generate the angle.
Cavalier Oblique Completed As you construct the oblique drawling, notice that surfaces that are parallel in the orthographic view remain parallel when transferred to the oblique drawing
Cabinet Oblique A cabinet oblique drawing is constructed similar to a cavalier oblique drawing except the distances transferred along the receding axis are reduced by half. This reduces the exaggerated (or long) look of oblique drawings where the depth measurement is significantly greater in proportion to the height and width.
Curved Surfaces When the curved edges of cylindrical features and holes appear circular in the front face of the object, the radii and diameters can be transferred directly to the appropriate face in the oblique drawing.
Curved Surfaces – Step 1 Step 1 - Begin the oblique drawing with light construction lines for the rectangular base plate and rear vertical plate.
Curved Surfaces – Step 2 Step 2 - The two circles representing the curved top of the vertical rear plate are drawn in both the front face and rear face.
Curved Surfaces – Step 3 Step 3 - The light diagonal line that goes from the center of the circle to the upper left corner in each face defines the point of tangency for the line that represents the edge of the curved surface on the upper left side.
Curved Surfaces – Step 4 Step 4 - Since the circles representing the hole do not overlap in the cavalier oblique, you will not see the edge of the rear hole. Only the circle representing the front edge of the hole is drawn with a visible line.