White Table Tops

Technology

• Term 2– Technical Drawings– Locker Shelf

• Diagrams

• Design Plan and Technical Diagram

Super Clothes Peg

Workbook pp. 189Textbook pp. 355

DEFINITIONS

A Diagram Is…

• A simplified representation of an object, a part of an object or a system

A Design Plan Is…

• A drawing that represents one or more aspects of the functioning of an object.

A Technical Diagram…• contains information about the

construction solutions for manufacturing an object or a system.

Symbols Used In Diagrams

Constraints Compression

Tension

Shearing

Compression

Tension

•

Shearing

Movement Unidirectional

Bidirectional

Unidirectional Rotation

Bidirectional Helical Motion

Bidirectional

Bidirectional Helical

Parts Screw / bolt

Nut

Screw / Bolt

Guides Translational Guide

Rotational Guide

Translational Guide

Rotational Guide

Common Rules for Drawing Schematic Diagrams

p. 190

Lines

• The lines must be clean and clear.

Colour

• Different colours are used to represent different parts.

Representation

• Different perspectives may be used, details, enlarged, or sections displayed to best show the object or provide information.

Proportions of parts

• The measurements of the parts do not need to be exact or to scale, but all proportions must be respected.

Dimensions

• Dimensioning is not required.

Information Contained in Design Plans

1. appropriate symbols

2. names of parts

3. symbols of motion and forces

4. Any other useful information

Information Contained In Technical Diagrams

1. The shapes

2. The names and quantities of the parts

3. The materials to be used

4. The linking components

5. The types of guides

6. Any other helpful information

Homework pp. 191-194

Symbols ID Competition

1. Table vs. Table

2. Pen / Paper / p. 357

3. # 1-11

4. Match Symbols with picture

Example

Symbols for Constraints

Symbols for Movement

Symbols for Guides

Parts:Draw the symbol

Answers

• Check your answers

• Correct answer with RED pen

Symbols for Constraints

SHEARING

TENSION

SHEARING

COMPRESSION

Symbols for Movement

ROTATIONAL

HELICAL

TRANSLATIONAL

HELICAL

Symbols for Guides

ROTATIONAL

TRANSLATIONAL

Parts:Draw the Symbol

TOTAL

/11

Design Plan and Technical Diagram of a Paper Punch

3. How does the Technical object work?

Punch BladeFulcrum

Lower & Upper Level

Spring

Paper GuideChad Reservoir

8. Complete the design plan for the paper punch.

8. Complete the design plan for the paper punch.

• The points where force must be exerted– Compression, Tension or Shearing

• The motion of the paper punch levers– Unidirectional, Bidirectional, Rotational or

Helical

• Names of the various parts illustrated– Question 3

Order of Operations

1. Design Plan and Technical Diagram of a Paper Punch

2. Design / Technical Diagram

3. Super Clothes Peg Build