Title: Chapter 5 2D Drawings
1Chapter 52D Drawings
2Common Manufactured Features
- Certain features are part of many engineering
designs - Learning their names and shapes helps you
visualize and communicate about them
3Common Manufactured Features
4Common Manufactured Features
5Common Manufactured Features
- Fillet a rounded interior blend between
surfaces - Round a rounded exterior blend between surfaces
- Chamfer an angled surface used on parts to make
them easier to handle - Boss a short raised protrusion above the
surface of a part
6Common Manufactured Features
- Counterbore a cylindrical recess around a hole,
usually to receive a bolt head or nut - Countersink a conical-shaped recess around a
hole, often used to receive a tapered screw head - Spotface a shallow recess like a counterbore
used to provide a good bearing surface for a
fastener
7Common Manufactured Features
- Lug a flat or rounded tab protruding from a
surface usually to provide a method for
attachment - Flange a flattened collar or rim around a
cylindrical part to allow for attachment
8Common Manufactured Features
- Neck a small groove cut around the diameter of
a cylinder, often where it changes diameter - Keyway/Keyseat a shaped depression cut along
the axis of a cylinder or hub to receive a key,
used to attach parts to a cylinder so they wont
turn on it
9Common Manufactured Features
- Knurl a pattern form on a surface to provide
for better gripping or more surface area for
attachment - Bushing a hollow cylinder that is often used as
a protective sleeve or guide or as a bearing
10Common Manufactured Features
11Common Manufactured Features
12Common Features
13Common Features
14Conventional Representations
- Standard orthographic projections dont always
show complex shapes as clearly and simply as you
may wish - Simplified conventional representations that
deviate from true orthographic projection may be
used to enhance economy and clarity in a drawing
15Intersections and Tangencies
- A plane surface can intersect or be tangent to a
contoured surface - When a plane intersects a contoured surface, a
line is drawn to represent that edge - When a plane surface is tangent to a contoured
surface, no line or a thin phantom line is drawn
16Intersections and Tangencies
17Intersections and Tangencies
18Intersections and Tangencies
19Fillets and Rounds
- A rounded interior corner is called a fillet.
- A rounded exterior corner is called a round.
- SolidWorks uses the name fillet for both rounds
and fillets. - Sharp corners are usually avoided because they
are difficult to produce and can weaken the part
by causing stress concentrations.
20Conventional Edges
- Because the true projection may be misleading,
there is a conventional way of showing rounded
and filleted edges for the sake of clarity
21Tangent Edges
22SolidWorks In a drawing right click on the
part. Select Tangent Edge Select Option
23More Conventional Edges
24Necessary Views
- When drawing an orthographic projection you must
include the appropriate number of views to fully
describe the true shape of the part. - You may use a fewer number of views if you can
fully describe the part in the given views.
25One View Drawing
26Two View Drawing
27Three View Drawing
28Partial Views
- A view may not need to be complete in order to
clearly describe an object - If the view is symmetrical, you can draw a
half-view on one side of the centerline
29Showing Enlarged Details
- Enlarged views may be added that show details at
a larger scale
30Conventional Breaks
- To shorten the view of a long object, you can use
break lines
31Removed Views
- A removed view is a complete or partial view
removed to another place on the sheet so it is no
longer in direct projection with any other view - Removed views show features of an object more
clearly - Be sure to label removed views and provide a
scale if necessary
32Removed Views
33Right-hand Left-hand Parts
- Often parts function in pairs of similar opposite
parts - The two parts are mirror images and are not
interchangeable - Ordinarily, you draw only one of two opposite
parts and label them appropriately
34Right-hand Left-hand Parts
35Revolution Conventions
- Regular multiview projections are sometimes
awkward, confusing, or misleading - To prevent confusion, features may be revolved to
line up vertically and project true length to
make symmetry clear
36Revolution Conventions
37Revolution Conventions
38Revolution Conventions
39Common Hole Features
- Common Hole Features are defined in drawings
using a standard notation in hole callouts. - Countersink w
- Counterbore - v
- Spotface - v
- Depth - x
40Hole Callouts
41Hole Callouts