上海交通大学：《工程学导论》课程教学资源（讲义）Technical knowledge_1screw

Machine Components Introduction to Engineering

1 Introduction to Engineering Machine Components

Contents Threaded Fasteners and Power Screws 。 Rivets Springs Sliding Bearings Rolling-Element Bearings Spur Gears 。 Helical,Bevel,and Worm Gears Shafts and Associated Parts Clutches and Brakes Miscellaneous Power Transmission Components Introduction to Engineering

2 Introduction to Engineering Contents • Threaded Fasteners and Power Screws • Rivets • Springs • Sliding Bearings • Rolling-Element Bearings • Spur Gears • Helical, Bevel, and Worm Gears • Shafts and Associated Parts • Clutches and Brakes • Miscellaneous Power Transmission Components

Objectives Develop a technical vocabulary Describe the applications of these machine components 3 Introduction to Engineering

3 Introduction to Engineering Objectives Develop a technical vocabulary Describe the applications of these machine components

Threaded Fasteners and Power Screws Introduction to Engineering

4 Introduction to Engineering Threaded Fasteners Threaded Fasteners and Power Screws and Power Screws

What Is Fasteners? Fasteners are essential hardware components that make different parts together 5 Introduction to Engineering

5 Introduction to Engineering What Is Fasteners? Fasteners are essential hardware components that make different parts together

The factors govern fasteners selection Corrosion Easy,low-cost (automated)assembly. Ease of disassembly for the replacement Difficulty of disassembly for resisting vandalism Introduction to Engineering

6 Introduction to Engineering The factors govern fasteners selection Corrosion Easy,low-cost (automated) assembly. Ease of disassembly for the replacement Difficulty of disassembly for resisting vandalism

Classes of Fasteners Removable Fasteners Be easily removed with hand tools and without damaging any parts. Such as nuts and bolts Permanent Fasteners Installed permanently in place Not be removed for routine maintenance work.Such as Rivets. Introduction to Engineering

7 Introduction to Engineering Classes of Fasteners Installed permanently in place Not be removed for routine maintenance work. Such as Rivets. Removable Fasteners Permanent Fasteners Be easily removed with hand tools and without damaging any parts. Such as nuts and bolts

Types of Threaded Fasteners ●Screws oNuts o Bolts ●Stud ●Threaded rod 8 Introduction to Engineering

8 Introduction to Engineering Types of Threaded Fasteners Screws Nuts Bolts Stud Threaded rod

Treaded Fastener Types 1.Screws 出 An external threaded fastener Generally assembled into a blind threaded (tapped)hole 出 The most common type of threaded fasteners screw 9 Introduction to Engineering

9 Introduction to Engineering Treaded Fastener Types  An external threaded fastener  Generally assembled into a blind threaded (tapped) hole  The most common type of threaded fasteners screw 1.Screws

Treaded Fastener Types 2.Bolt and nut bolt >A bolt is an externally threaded nut fastener >A nut is an internally threaded fastener having threads that match bolts 10 Introduction to Engineering

10 Introduction to Engineering Treaded Fastener Types A nut is an internally threaded fastener having threads that match bolts bolt nut 2. Bolt and nut A bolt is an externally threaded fastener