Sections Threaded fasteners and power screws Rivets Springs Sliding Bearings Rolling-Element Bearings Spur Gears Helical Bevel and worm gears Threaded Fasteners and Power screws Classes of Fasteners They may be classified into two broad categories: Removable and Permanent Removable Fasteners are defined as those that can be easily removed with hand tools and without damaging any parts. Ordinary nuts and bolts are typical examples

Thermal Sciences and Mechanical Engineering Sections 1 Introduction, 2. The Concept of Temperature 3. Heat Transfer 4. Thermodynamics, 5. Thermal Deformation, 6. Heat Treatment 7. Energy and Environment, 8 Summary Objectives

Fluid Mechanics and Mechanical Engineering Sections 今 Fluid statics Fluid Dynami Aerodynamics Fundamentals S 1. Fluid Properties A fluid is a substance that deforms

Statics, Dynamics and Mechanical Engineering 1、 Introduction Mechanics Science which describes and predicts the conditions of rest or motion of bodies under the action of forces The field of Classical mechanics can be divided into three categories 1)Mechanics of Rigid Bodies

Here we'll discuss the basic idea behind an engine, and then go into detail about how all the pieces fit together and how to increase performance Internal Combustion Almost all cars currently use what is called a four-stroke combustion cycle to convert gasoline into motion. The four-stroke approach is also known as the otto cycle

【例一】补全主视图中的漏线 【例二】补全主、俯、左三个视图中的漏线 【例三】根据主、俯视图,求左视图 【例四】根据主、俯视图,求左视图 【例五】根据主、俯视图,求左视图

(一)是非题 1.两形体的表面共面或相切时,其表面交界处有时有线有时没有线。() 2.一个视图上的封闭线框,在其它视图上对应的投影不是积聚成线,就是一个与其形状相类似的图形。()

画图和读图是学习本课程的两个主要环节。画图时运用形体分析法按 组合体的形状特点画出其视图。而读图时,也是运用形体分析法,分析构 成组合体的各基本体的形状及它们之间的相对位置、连接关系,从而想象 出它的空间形状。对某些局部结构,有时还要用线面分析法分析组合体表 面的形状和位置,想象出局部结构的形状

本节主要介绍根据实物(或立体图)画组合体三视图的步骤和方法。 一、以叠加为主的组合体三视图的画法 二、以切挖为主的组合体三视图的画法

一、概述 综合问题:主要指需要运用多个基本 作图方法和知识点才能解决的问题。 求解综合问题的思路:运用点、直线、 平面间的平行、相交、垂直等相对几何关 系及画法几何中的一些基本作图方法,寻