VẼ CƠ KHÍ Chapter 1 engineering drafting communication

Chapter 1:

COMMUNICATION:

Art of exchange of thoughts, emotion and description things among man and people

VERBAL, VOCAL COMMUNICATION

(daily, banal and trivial
activities)

LITERAL COMMUNICATION

(formal used for complicated objects)

Writing

Novels, books…

Technical Drawing

Drafting

Pictures, Painting


TECHNICAL DRAWING

ENGINEERING
DRAWING

ORTHOGONAL PROJECTION
Lines of sight are parallel, used
in Mechanical, Electrical, Civil
Engineering

ARCHITECTURAL
DRAWING

PERSPECTIVE PROJECTION
Lines of sights are concured,
concentrated used Architecture, painting.


EIFFEL TOWER
Paris, 312m, 1889



ENGINEERING DRAFTING : ORTHOGONAL PROJECTION
FRANCE , ISO, 1 ANGLE PROFECTION : ISO
STYLE


3RD ANGLE PROFECTION, AMERICAN, US STYLE


Schema, Diagram, Flowchart


Exploded view drawing

Exploded view drawing


An American style assembly drawing


Two American style Part (Detail)
drawings


H.W: English names of the following tools?

TOOLS in Technical drafting and Benchwork


TOOLS in Technical drafting and Benchwork


Hacksaw (blade & Frame)
Chiseling, Punching, filing
Scrapering


Assembly drawing:

1.Dimensions
- Boundary dim.
- Assembly dim.

- Axial center distance
2. Details numerations
3. List of details, parts
4. Technical Requirements


Party drawing

1 Dimensions
-Enough and detailed
- Important dimensions have tolerance
2. Surface roughness
3. Geometric disturbance
4. Technical requirements
5. Metarials & quantity


Homework: Translate all terminologies in Block name and mechnical part list

to English


Homework: Translate all terminologies in Block name and mechnical part list
to English


TECHNICAL REQUIREMENTS
- Heat treatment: annuling, tempering
-Hardness: HB (Hardness of Brinell)
HV (Hardness of Vikers)

HR (Hardness of Rockwell)
-Chamfering


EXERCISE 1: TECHNICAL CURVES
1. Involute curve