华南理工大学《机械制造技术基础》chapter4-section1new.pptxVIP

Chapter 4 Machine Tools and Machining Operations for rotational parts Abstract Machine parts are basically separated into two: rotational parts and non-rotational parts. This chapter will focus on the required machine tools, cutting tools and machining operations for rotational parts. The lathes and lathe cutting tools, including main mechanism of CA6140 and the structure of turning tools are introduced. In the same time, the work principle of the machining methods of grinding, some hole-produced machines and cutting tools, are also introduced . machining of rotational parts (a) Track Machining (b) forming method Key words Name of machine tools: Lathe (车床), screw thread machine (螺纹机床), Grinding machine(磨床), boring machine(镗床), drilling machine(钻床), broaching machine(拉床). Methods of shape generation: Turning, Taper turning, boring （镗孔）, drilling, core drilling（扩孔）, counter boring（锪孔）, reaming（绞孔）, grinding, Knurling（滚花）, threading Lathe Grinding Machine Drill Press 4.1 Lathes and lathe cutting tools 4.2 Grinding machines 4.3 Hole making machine tool and cutting tool Index 4.4 Process analysis of rotational parts 4.1 Lathe and Lathe Cutting Tools 4.1.1 turning operation Lathe is mainly used to produce parts in round shape. It removes material by rotating the workpiece against a single-point cutter, while the latter feeds linearly. Operations that can be performed on a lathe: a). Straight turning b). Taper turning c). Profiling d). Facing e). Turning and external grooving f). Face grooving g). Form cutting h). Boring i). Drilling j). Cutting off k). Threading l). Knurling Let’s take CA6140 lathe as the example. It is very typical among the common lathes. Typical machining by lathe Types of lathe： 1.普通车床、落地车床；(Engine lathe/ ground lathe) 2.立式车床；(Vertical lathe) 3.转塔（六角）车床；(Turret lathe) 4.多刀半自动车床；(Semi-automatic lathe) 5.仿形车床及仿形半自动车床；(Profiling lathe) 6.单轴自动车床；(single-axis a