Mechanical Drawing I

Mechanical Drawing I

Course Description

Product designs start with ideas and sketches. Trained drafts people use their skills, drawing instruments, and computers to convert sketches into accurate, detailed drawings. This course will give you the opportunity to learn to use a variety of drawing instruments to make very accurate visualization skills. You will learn how to draw accurate plans and how to read and interpret different types of drawings. You must currently posses the ability to measure correctly, read numbers and fractions, and follow specific directions.

Required Resources:

Text – Technical Drawing , 12th ed

Supplies - Drafting equipment (see attached list), drafting paper, graph paper, paper for note taking and pencils. Computer and CAD software will be provided by the school.

Evaluation Procedures:

Seventy percent (70%) of the students grade will be determined by the grade received on drawings (mechanical and CAD). In order to receive the best grade, students should turn in drawings completed and on time. Drawings will be evaluated on the standards discussed in class and presented in the text.

Twenty percent (30%) of the grade will be based on exams and quizzes.

Course Outline

I.  Mechanical Drawing/Graphic Language

A.  What is Graphic Language

B.  Hand out instruments

1.  Drawing Machines

2.  Papers

a.  size

b.  length

3.  Drawing Pencils

a.  Lead weight

b.  Lead thickness

4.  Compass

C.  Complete Instrument contract

D.  Alphabet of lines (Add as we go)

1.  Border

2.  Visible

3.  Construction lines

4.  Section lines

5.  Center lines

6.  Dimensions

7.  Cutting Plane

E.  Neatness

F.  Sheet Layout

II.  Lettering

A.  Style and steps to lettering a drawing

B.  1/8” high, gothic, all capitals, even spacing

C.  Complete the title block

III.  Basic steps to complete a drawing

A.  Lay out the paper

B.  Center the drawing

C.  Good technique in marking the points for the lines

D.  Draw the arcs and circles, horizontal lines, vertical lines, diagonal lines

1.  Complete Base Plate

2.  Complete Adjusting Arm

(TEST)

IV.  Geometric Construction

A.  Related Vocabulary

B.  Relationship to Math

C.  Required work

1.  Drawing on B size paper

2.  fig 6-18 a, b fig 6-19a,c

3.  Gasket

4.  Game Board

(TEST)

V.  Mulit-View drawings

A.  Orthographic Projection

B.  Vocabulary

C.  Opening the cube

1.  Choice of views

a.  2 views (cylindrical objects)

b.  3 views of objects

2.  Elimination of views

D.  Hidden line

E.  Centerlines

(TEST)

VI.  Dimensioning

A.  Complete description of objects

B.  Rules of dimensions

1.  Location

2.  Arrow heads

C.  Placement of dimensions

D.  Direction of dimension figures

1.  Aligned

2.  Unidirectional

E.  Dimensioning Angles

1.  With an arc

2.  Coordinate system

a.  more accurate

b.  CNC program

F.  Dimensioning arcs and circles

G.  Fillets and rounds

H.  Symbols and definition of terms

(TEST)

VII.  Section Views

A.  Purpose

B.  Types of section view

C.  Vocabulary

D.  Required Drawing

1.  Slide Collar

2.  Adjuster Plate

3.  Pipe Collar

4.  Lever Hub

(TEST)

VIII.  CAD

A.  Computer Terminology

B.  History of CAD

C.  AUTO CAD

D.  SOLIDWORKS

E.  Pen design

IX.  Design

A.  What is design

B.  How does design affect performance

C.  Personal taste and design