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, ANGLE PROFECTION : ISO STYLE 3RD ANGLE PROFECTION, AMERICAN, US STYLE Schema, Diagram, Flowchart Exploded view drawing Exploded view drawing An American style assembly drawing TOOLS in Technical drafting and Benchwork Hacksaw (blade & Frame) Chiseling, Punching, filing Scrapering Assembly drawing: 1.Dimensions - Boundary dim - Assembly dim - Axial center distance Details numerations List of details, parts Technical Requirements Party drawing Dimensions -Enough and detailed - Important dimensions have tolerance Surface roughness Geometric disturbance Technical requirements 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 Involute curve