Department of Mechanical Engineering

Computer Aided Drafting and Modeling Laboratory Manual

Department of Mechanical Engineering

For Second Semester Civil & Mechanical Engineering Students (2012-13)

Name :…………………………………

University Register No:…………………………………

Class :…………………………………

Year / Sem :…………………………………

Computer Aided Drafting and Modeling Laboratory Manual

TABLE OF CONTENTS

S. No Date Name of the Exercise Submission

Date Marks

Sign

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

080120008 COMPUTER AIDED DRAFTING AND MODELING LABORATORY 0 1 2 100 2

List of Exercises using software capable of Drafting and Modeling

I. Study of capabilities of software for Drafting and Modeling – Coordinate systems

(absolute, relative, polar, etc.) – Creation of simple figures like polygon and general

multi-line figures.

2. Drawing of a Title Block with necessary text and projection symbol.

3. Drawing of curves like parabola, spiral, involute using Bspline or cubic spline.

4. Drawing of front view and top view of simple solids like prism, pyramid, cylinder, cone,

etc, and dimensioning.

5. Drawing front view, top view and side view of objects from the given pictorial views

(eg. V-block, Base of a mixie, Simple stool, Objects with hole and curves).

6. Drawing of a plan of residential building (Two bed rooms, kitchen, hall, etc.)

7. Drawing of a simple steel truss.

8. Drawing sectional views of prism, pyramid, cylinder, cone, etc,

9. Drawing isometric projection of simple objects.

I0. Creation of 3-D models of simple objects and obtaining 2-D multi-view drawings from

3-D model.

Note: Plotting of drawings must be made for each exercise and attached to the

records written by students.

List of Equipments for a batch of 30 students:

I. Pentium IV computer or better hardware, with suitable graphics facility – 30 Nos.

2. Licensed software for Drafting and Modeling. – 30 Licenses

3. Laser Printer or Plotter to print / plot drawings – 2 Nos.

INTRODUCTION TO SOLID EDGE

Solid Edge Version 19 is the latest release of UGS’ hybrid 2D/3D software and the premier design-centric solution in the mid range CAD industry. It is easiest to learn and use, and the most productive mainstream CAD system available. It has superior large assembly modeling and management. In this software migration of 2D to 3D is very simple.

Step1: Start Solid Edge

On the start menu, click all programs, click Solid Edge V19, and then click Solid Edge. The startup screen is displayed.

The startup Screen

Solid Edge has four separate document types: Parts (.par), Sheet Metal Parts (.psm), Assemblies (.asm) and drawings (.dft). Solid Edge provides many tutorials to learn the usage of the product.

The startup screen is always available. At any time it is possible to open Solid Edge documents to access the favorite links, commands, tutorials, tips and apprentice mode option.

Step 2: Create a Solid Part

Solid Edge comes with blank documents called templates that you can customize to meet the requirements.

On the main toolbar, click the New button. On the new dialog box, click the more tab, and then select the Normmet.par template. Click OK to the New file. Step 3: Look around

Solid edge is easy to use, because it was designed that way. Developed with stream technology, Solid edge is designed increase software performance with an interface that ensures maximized user productivity and return on investment. Stream technology makes Solid Edge easy to learn, easy to use and more productive than any other mainstream CAD system on the market. The innovative STREAM technology in tools such as the Smart Step Ribbon bar, Intellisketch, Smart sketch, Edge bar, and more make Solid Edge the easiest-to-use MCAD package available.

At the top of the window below the title bar, the menu bar has cascading menus for standard windows commands such as File, Edit, View and so forth as well as tools, Features, Applications, and other menus of commands that are specific to Solid Edge.

Beneath the menu bar, The main tool bar contains the typical Windows commands you use for opening and saving documents, cutting, copying and pasting elements, along with other commonly used commands for shading Windows, zooming in out and so forth.

Beneath the main tool bar, the ribbon bar changes as

you work to provide options for the command that is currently running. Ribbon bars guide you through the steps of working through commands, let you choose options, and accept input such as names and distances.

The status bar always displays what the system expects

you to do next look here first if you are not sure what to do. Edge bar arranged vertically along the left side of the

graphic window, helps you manage and complete tasks on a design project. The Feature path finder tab on edge bar makes it easy to keep the track of the features you construct when designing parts. Each feature you construct is added to the feature path finder as you work.

Later when you need to edit a feature, simply select it in the feature path finder,

and the feature highlights in the graphic window. You can quickly make the necessary changes.

Beside Edge bar, the vertical tool bars along the vertical window change as you work to provide commands for creating features on parts, drawing profiles, working with assemblies, generating drawings and so forth.

Mouse Buttons

Left button – use this button to select geometry, command and option buttons, and entries in the Edge bar tool. The left button is used most of the time.

Right Button – Use this button to activate context sensitive shortcut menus. The contents of this menus change depending on what object is the cursor is over. This shortcut menu gives the quick access to frequently used commands and options an help you to work more quickly. And also use the right mouse button to finish commands. This is often quicker and easier than clicking the preview and finish buttons with the leftmost button.

BASIC COMMANDS USED IN SOLID EDGE

Line command: Draws continuous series of lines and arcs that can be perpendicular or tangent to each other.

Curve command: Draws a smooth curve using points by click and drag or by clicking several edit points to define the curve.

Arc command: Draw an arc using three points, the first point defines the center o the arc and the next two points define the sweep.

Circle command: Draws a circle using centre point and radius.

Rectangle command: Draws rectangle using three points the first point two points define the width and rotation angle of the rectangle, and the third point defines the height and also draw a square with this command.

Fillet command: Draws a fillet between two elements. The element can be arcs, lines, circles, ellipses or curves.

Chamfer command: Draws the chamfer or bevel between two elements. This command copies elements while maintaining characteristics such as the angle of lines and the centre point of circles.

Fill command: Places a fill inside a closed boundary and can modify fill properties with the fill ribbon bar.

Smart dimension command: Places a dimension on any single element or between any two elements. The dimension types available depend on the element selection.

Distance between command: Places a linear dimension that measures the distance between elements or key points.

Angle between command: Places a dimension that measures the angle between elements or key points and the dimension is placed in one of the four quadrants.

Construction command: Changes profile elements into a construction elements or construction element into a profile element.

Trim command: Trims open and closed elements either to the closest intersection in

both directions or to selected elements.

Trim corner command: Draws corner by extending and / or trimming two selected open elements.

Extend to next command: Extends one or more open elements until they intersect

with the nearest element or the element selected in the active window. The extension direction is determined by the selection of the elements to extend.

Split command: Splits open and closed elements at the location specified, this command is used when working with 2D elements such as profiles, sketches, Cutting planes, lines and so forth to spilt a2D wire frame elements into two separate elements.

Move command: Moves element from one location to another. One or more elements movement at a time is possible.

Rotate (2D Elements) command: Rotate s one or more 2D elements a precise distance or angle about a specified point.

Mirror command: Mirrors one or more selected elements about a line or axis that defined and mirror without copying or mirror and copy.

Scale command: Reduces or enlarges selected elements by a defined scale factor.

Connect command: A key point of one element remains connected to key point of another element.

Concentric command: Makes an arc or circle concentric with another arc or circles.

Horizontal/Vertical command: Makes a line horizontal or vertical.

Collinear command: Makes two lines collinear.

Perpendicular command: Makes two elements perpendicular. It makes two lines, a line

and an arc or a line and a circle perpendicular.

Tangent command (Profile Environment): Makes two elements tangent. A tangent relationship at the end point between a line and an arc is also possible.

Equal command: Makes elements equal. It can apply between the equal relationship to the lengths of lines and the radii of arcs and circles.

Symmetric command: Makes element symmetric about an axis. The characteristics of the elements on each side of the axis, such as size and position are maintained by the symmetric relationship.

I. Study of capabilities of software for Drafting and Modeling – Coordinate systems

(absolute, relative, polar, etc.) – Creation of simple figures like polygon and general

multi-line figures.

In Solid Edge software here we are using Direct Distance Entry Method.

1. Construct an equilateral triangle of side of 40mm.

2. Construct a square of side 40mm

3. Construct a regular pentagon of side 30mm

3. Construct a regular Hexagon of side 30mm

4. Construct an Octagon inscribed in a square of side 50mm & Draw a circle of diameter 40mm

II. Drawing of a Title Block with necessary text and projection symbol.

III. Drawing of curves like parabola, spiral, involute using Bspline or cubic spline.

In Solid Edge Software we are using curve and Convert to curve commands instead of Bspline or cubic spline commands.

1. Construct a parabola when the distance between the focus and directrix is 30mm. Draw the tangent and normal at any point on the curve

2. A rectangle has sides AB = 16cm and BC = 10cm. Inscribe a parabola passing through a point A and B and the mid point E of the side CD. Find the position of the focus and directrix of the parabola.

3. Construct a rectangular hyperbola. A point Q on the curve is 35mm and 45mm from the asymtotes. Draw the curve showing at least 4 points on either side of Q.

4. The vertex of the hyperbola is 65mm from its focus. Draw the curve if the necessary eccentricity is 3/2.Draw also tangent and normal at any point on the curve.

5. Draw the involute of a square of side 30mm.

6. Draw the curve traced out by an end of a thin wire unwound from a regular hexagon of side 15mm, the wire being kept taut. Draw a tangent and normal to the curve at a point 90mm from the centre of the hexagon.

7. Construct one convolution of an involute of a circle of diameter 30mm. Draw the tangent and normal at a point on the involute 65mm distant from the centre of the circle.

IV. Drawing of front view and top view of simple solids like prism, pyramid, cylinder, cone, etc, and dimensioning.

1. Draw the front and top view of Pentagonal prism of side 30mm and axis length 60mm. 2. Draw the front and top view of cylinder of diameter 50mm and axis length 60mm. 3. Draw the front and top view Hexagonal Pyramid of side 30mm and axis length 60mm. 4. Draw the front and top view of cone of diameter 50mm and axis length 60mm.

V. Drawing front view, top view and side view of objects from the given pictorial views(e.g. V-block, Base of a mixie, Simple stool, Objects with hole and curves).

VI. Drawing of a plan of residential building (Two bed rooms, kitchen, hall, etc.)

VII. Drawing of a simple steel truss.

VIII. Drawing sectional views of prism, pyramid, cylinder, cone, etc,

1. A square prism of base side 30 mm and axis length 60 mm is resting on HP on one of its bases, with a base side inclined at 250 to VP. It is cut by a plane inclined at 400 to HP and is bisecting the axis of the prism. Draw its front view, sectional top view.

25°a

b

c

d

30

p

q

r

s

40°

60

a' b' c' d'

p' q' r' s'X

Y

2. A square pyramid of base side 30mm and axis length 60 mm is resting on HP on its base with one side of base inclined at 300 to VP. It is cut by plane inclined at 450 to HP and perpendicular to VP and passes through the axis at a distance 25mm from the apex. Draw its front view and sectional top view.

45°

30°

o'

a

b

c

d

o

X Ya' b' (d') c'

60

25

30

3. A pentagonal pyramid of base side 40mm and axis length 75mm resting on HP on its base with one of its base side parallel to VP. It is cut by a plane inclined at 350 to HP and perpendicular to VP and bisecting the axis. Draw its front view and sectional top view.

a

b

c

de

o

o'

a' (e') b' (d') c'XY

35°

75

35

4. A hexagonal prism of base side 30mm and axis length of 60mm is resting on HP on one of its bases two of the vertical faces perpendicular to VP. It is cut by a plane inclined at 500 to HP and perpendicular to VP and passing through a point at a distance 12mm from the top base. Draw its front view and sectional top view.

5. A cylinder of base diameter 45mm and height 65mm is resting on its base on HP. It is cut by a plane perpendicular to VP and inclined at 300 to HP and meets the axis at a distance of 30mm from the base. Draw the front view and sectional top view.

30

65

a

b

c

d

e

f

gh

p

q r

st

u

v

w

a' b' e' f'

(h') (g') (f')

p' q' r' s' t'

(u')(v')(w')

30°

X Y

O45

6. A cylinder of base diameter 50mm and height 60mm rests on its base on HP. It is cut by a plane perpendicular to VP and inclined at 450 to HP. The cutting plane meets the axis at a distance 15mm from the top base. Draw the sectional plan and front view.

a

b

c

d

e

f

g

h

a' b' c' c' d'

(h') (g') (f')

p

qr

s

t

uv

w

p'q' r' s' t'

(w') (v') (u')

X Y

60

15

R 25

7. A cone of base diameter 50mm and axis length 75mm resting on HP on its base is cut by a plane inclined at 450 to HP and perpendicular to VP and it is bisecting the axis. Draw the front view and sectional top view.

a

b

c

d

e

f

gh

o

o'

a' b' c' d' e'

(f')(g')(h')

45°

75

37,5

X Y

8. A cone of base diameter 50mm and axis length 60mm stands with its base on HP and it is cut by a section plane 500 to HP and perpendicular to VP and passing through a point on the base circle of the cone. Draw the sectional top view and front view.

X Y

oa

b

c

d

e

f

gh

o'

a' b' c' d'e'

(f')(g')(h')

50°

60

IX. Drawing isometric projection of simple objects.

1. A Hexagonal prism of base side 30mm resting on HP on its base with a side of base parallel to VP. Draw the isometric view.

2. Draw the isometric view of hexagonal pyramid of base side 30mm and axis length

60mm that is resting on the base.

3. Draw the isometric view of a vertical cylinder of base diameter 50mm and axis length 60mm.

4. Draw the isometric view of a cone of base diameter 50mm and axis length 60mm resting on its base.

5. Draw the isometric view of a hexagonal prism of base side 30mm and axis length 60mm rests on HP on one of its rectangular faces with its axis perpendicular to VP.

6. Draw the isometric view of hexagonal pyramid of base side 30mm and axis length 60mm placed with its axis perpendicular to VP.

7. Draw the isometric view of a horizontal cylinder of base diameter 50mm and axis length 60mm.

8. Draw the isometric view of a cone of base diameter 50mm and axis length 60mm placed in the horizontal position.

X. Creation of 3-D models of simple objects and obtaining 2-D multi-view drawings from 3-D model.

]