A CNC mill, often called a machining center, holds a part while a rotating tool cuts metal. Figure 2. A CNC lathe, often called a turning center, rotates a workpiece while a tool cuts metal. Term DefinitionCode To create programmable sets of instructions for a CNC machine.
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Part Program A series of numerical instructions used by a CNC machine to perform the necessary sequence of operations to machine a specific workpiece. Prototype The original test model of a product. Punch Presses A machine that uses force to either cut or form a workpiece.
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Figure 1. CNC machines use numerical data to control machine tools. Figure 2. The CNC control panel is where an operator communicates with the CNC machine. Because CNC processes involve the storage of a variety of different programs, CNC is more versatile than processes involving fixed automation.
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Includes instruction in CNC terminology, setup, programming, operations, and troubleshooting; blueprint reading; machining; lathe and mill operations; technical mathematics; computer literacy; CAD/CAM systems; shop and safety practices; equipment capabilities; and regulations and laws.
http://nces.ed.gov/ipeds/cipcode/cipdetail.aspx?y=55&cip=48.0510
CNC machining can be used for milling, drilling, tapping, bending, welding, grinding, etc Many industrial items are fabricated or assembled from components at the end of a CNC process. For work requiring extreme accuracy, a Swiss-style lathe is used.
http://www.micro-matics.com/cnc_swiss_glossary.html
CNC turning center A sophisticated CNC machine that specializes in turning, boring, drilling, and threading operations, all at the same location.collet A slitted device that holds a workpiece in place as it rotates. A collet has a hole through which the workpiece passes, and it is designed to hold specific dimensions. Collets can also be used to hold cutting tools. computer numerical control A sophisticated machine tool that uses a computer and special programs to carry out various machining operations.
http://www.micro-matics.com/cnc_swiss_glossary.html
Deflection often causes incorrect measurements. depth of cut The amount of material that is removed with one pass of a cutting tool. drive shaft Located in the base of a turning machine, the device that transfers power from the motor to all machine components.dimension The desired measurement of a feature on a part.
http://www.micro-matics.com/cnc_swiss_glossary.html
CNC stands for computer numerical control. CNC uses numerical data to control a machine tool. Machining instructions are communicated to the CNC machine, like the ones shown in Figure 1. The instructions needed to machine a workpiece include feed, speed, depth of cut, and all the necessarytool motions. This set of instructions is known as a part program.
http://www.toolingu.com/images/finished_pdf_files/300100.pdf
1. (General Engineering) engineering a form of computer control applied to machine tools, by which an operation is directed from numerical data stored on tape or punched on cards.
http://www.thefreedictionary.com/cnc
facing An operation performed on a lathe that feeds a single-point tool into the end of a cylindrical workpiece to create a flat surface. feed The linear movement of a cutting tool into a part to remove material.follower A machine component that traces the outline of a cam and thus controls the way a workpiece is cut.
http://www.micro-matics.com/cnc_swiss_glossary.html
cnc machining definition
CNC machining holds a part while a rotating tool cuts metal. Computer Numerical Control machining holds a part while a rotating tool cuts metal.