8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 1/17

GEOMETRIC DRAWING

CCB 1052

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 2/17

CCB 1052

Universiti Teknologi PETRONAS 2

Objectives

By the end of this lecture, studentshould be able to

Explain what is geometric drawing

Draw circles at different conditionsrequired

Produce polygons on drawing

 Array object in polar or rectangular way

Modify drawing by using chamfer and filletmethod

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 3/17

CCB 1052

Universiti Teknologi PETRONAS 3

Geometric Drawing

Definition:

 A drawing that specifies the size and

location of an object / model, as well

as other qualities such as form / shape 

and orientation.

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 4/17

CCB 1052

Universiti Teknologi PETRONAS 4

Circle - Bulls-eye

Offset a circle (hatched with solid red) by

1.0 to create the bulls-eye. Add dimlin to

show the diameters.

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 5/17

CCB 1052

Universiti Teknologi PETRONAS 5

Circle_2P

•  Add mtext and annotation (qleader).

•Copy the small circle.

•Osnap the center and quadrant.

Note:

%%c = Ø is the

diameter symbol.

What is

qleader /

leader?

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 6/17

CCB 1052

Universiti Teknologi PETRONAS 6

Circle_3P

• Similar to Circle_2P.

• Difference in touching 3P instead of 2P.

Note:

%%c = Ø is the

diameter symbol. 

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 7/17

CCB 1052

Universiti Teknologi PETRONAS 7

Circle_TTR

 Any difference from Circle_2P?

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 8/17

CCB 1052

Universiti Teknologi PETRONAS 8

Circle_TTT

• offset the two smaller

circles inwards by 1.0.

• The final object aftertrim and bhatch.

• pedit the arcs (trimmed

objects) prior to hatching.

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 9/17

CCB 1052

Universiti Teknologi PETRONAS 9

 Polygon_Triangle

Inscribedin circle

Circumscribed aboutcircle

What is the difference between the two

triangles?

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 10/17

CCB 1052

Universiti Teknologi PETRONAS 10

 Array_Polar

• Hexagon  – inscribedin R1.5 circle.

•

Polar array Center point = (0,0)

 Angle to fill = 360o.

 Angle between items =

45o.

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 11/17

CCB 1052

Universiti Teknologi PETRONAS 11

 Array_Rectangular

• Rows = 3; Columns = 3.

• Row offset = 3.5; column offset = 6.0.

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 12/17

CCB 1052

Universiti Teknologi PETRONAS 12

Chamfer + Fillet

• Chamfer  – sharp corners.

• Fillet  – round corners.

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 13/17

CCB 1052

Universiti Teknologi PETRONAS 13

 Lab Expectation

Skills to draw a given geometricdiagram through an applied knowledge

of drawing lines, circles and polygonsSkills to modify the drawing

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 14/17

CCB 1052

Universiti Teknologi PETRONAS 14

Summary

Lecture

Definition of Geometric Drawing CIRCLES

MODIFY

Chamfer Fillet Array

POLYGONS

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 15/17

CCB 1052

Universiti Teknologi PETRONAS 15

Individually , performed

1. Exercise 3 (Student Manual)

2. Lab Assessment 3

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 16/17

CCB 1052

Universiti Teknologi PETRONAS 16

8/10/2019 GEOMETRIC DRAWING

http://slidepdf.com/reader/full/geometric-drawing 17/17

CCB 1052

Universiti Teknologi PETRONAS

TEST 1

TEST 1 WILL BE CONDUCTED AS FOLLOWS:

DATE: Week 6• Group A- PE1:22 October 2pm

• Group B- PE2: 22 October 3pm

• Group C- ChE1: 23 October 3pm

DURATION: 40 minutes

COMPUTER BASED TEST (CBT)- 1 QUESTION

 ATTENDANCE IS COMPULSORY. NO

SUPPLEMENTARY REQUEST WILL BE

CONSIDERED!!

17