Main concepts Flashcards
(26 cards)
What is a chamfer?
2mm thick and angle 45 ̊ inclination is dimensioned as: 2 x 45°
How do circles appear when viewed in isometric?
They appear elliptical
What is a dimension line?
A line that extrudes horizontally from the dimensioned number.
What is a extension line?
A extension line is the line which resides beneath the dimenion line and extrudes vertically from the dimensioned line.
What is a reader line?
A line usually used to dimension circles that extrudes from the circle and sometimes crosses the object itself.
What is the symbol for diameter?
Diameter symbol Ø
How do you normally write radius?
R(number) e.g. R10
List the 3 main types of pictorial views.
Isometric, oblique, perspective.
What is a screw thread?
A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix.
What does M12 x 1.3 mean as a screw thread?
A metric thread of 12mm diameter with a 1.3mm pitch between thread crest
What should a parts list include?
part number, manufacturing material, number of parts needed
What is a Auxiliary View?
To create a true projectionplane from an inclined plane in one of the primary views
What are the two types of Oblique projection?
Cavalier Projection and Cabinet Projection.
What is Cavalier Projection?
receding lines are true length and at 45 degrees
What is Cabinet projection?
the receding lines are foreshortened by half
What are Sections?
Sections are used to clarify the interior construction of a part that can not be clearly described by hidden lines in exterior views
What is the drawing standard that is used in Australia?
AS1100
Why do we used AS1100 as a drawing standard?
It defines every aspect of thedrawing. AS1100 provides a standard that (if followed by all companies), allows for a clarity,understanding and uniformity across all drawings generated nation wide
What are the advantages and disadvantages of CAD?
Advantages: Accuracy, file sharing/collaboration, rapid prototyping
Disadvantages: File loss/corruption, expensive software, training
What are the advantages and disadvantages of sketching?
Advantages: Quick, No specialist equipment
Disadvantages: Not as accurate, sketching skills are required
What is a fillet?
A fillet is a rounded corner or transition between two surfaces (a round but curving inwards)
What is a round?
A round is a rounded external edge feature.
What is a through hole?
A hole that fully passes through an object
What is a blind hole?
A hole that passes through an object but doesn’t go all the way through
