BOOK_CONTENT
From CNC Programming Handbook: A Comprehensive Guide to Practical CNC Programming, Second Edition

CNC MACHINES - TURNING

A conventional engine lathe or a turret lathe is a common machine in just about every machine shop. A lathe is used for machining cylindrical or conical work, such as shafts, rings, wheels, bores, threads, etc. The most common lathe operation is removal of material from a round stock, using a turning tool for external cutting. A lathe can also be used for internal operations such as boring, as well as for grooving, threading, etc., if a proper cutting tool is used. Turret lathes are usually weaker in machining power than engine lathes, but they do have a special carousel that holds several mounted cutting tools. An engine lathe has often only one or two cutting tools mounted at a time, but has more machining power.

Typical lathe work controlled by a CNC system uses machines known in industry as the CNC Turning Centers- or more commonly - the CNC lathes.

The term turning center is rather unpopular, but an accurate overall description of a computerized lathe (a CNC lathe) that can be used for a great number of machining operations during a single setup. For example, in addition to the standard lathe operations such as turning and boring, a CNC lathe can be used for drilling, grooving, threading, knurling and even burnishing. It can also be used in different modes, such as chuck work, collet work, barfeeder, or between centers. Many other combinations also exist. CNC lathes are designed to hold several tools...

Copyright Industrial Press 2003 under license agreement with Books24x7

Products & Services
Lathes and Turning Centers
Lathes and turning centers cut a rotating part with a stationary cutting tool. The tool moves parallel and perpendicular to the workpiece axis to provide the desired finished shape.
Turning Tools
Turning tools are used on lathes for cutting or finishing the outside diameter of a workpiece.
Machine Shop Services
Machine shop services use machinery or equipment to perform custom removal of material to fabricate a finished part.
CNC Machining Services
CNC machining services use fast, repeatable, and programmable machines which can function while unattended in order to manufacture parts quickly and efficiently.
Tailstocks and Bench Centers
Tailstocks are used on lathes and other machine tools to support one end of the workpiece through contact with a live or dead center. Bench centers are table top mounted units that support a workpiece between two tailstocks during inspection.

Topics of Interest

The major step towards the basic understanding of CNC principles and geometrical concepts is the understanding of a subject known in mathematics as the system of coordinates. System of coordinates is...

CNC MACHINES - TURNING Conventional engine lathe or a turret lathe is a common machine in just about every machine shop. A lathe is used for machining cylindrical or conical work, such as shafts,...

There is so much information that can be covered in this section, that a whole book could be written just on the subject of turning and boring. Selected subjects are presented in this chapter, others...

There is so much information that can be covered in this section, that a whole book could be written just on the subject of turning and boring. Selected subjects are presented in this chapter, others...

5.1 TURNING OPERATIONS Metal removal from cylindrical parts is accomplished using standard types of engine lathes or modern machining centers, the latter operated by computer numerical control (CNC).