Computer Numerical Control (CNC) CNC Training Course Computer

numerically controlled (CNC) 03035530865 Course in Rawalpindi


What is CNC Machining?
CNC machining is a term commonly used in manufacturing and

industrial applications, but exactly what does the acronym CNC

stand for and what is a CNC machine?

The term CNC stands for 'computer numerical control', and the

CNC machining definition is that it is a subtractive

manufacturing process which typically employs computerized

controls and machine tools to remove layers of material from a

stock piece—known as the blank or workpiece—and produces a

custom-designed part. This process is suitable for a wide range

of materials, including metals, plastics, wood, glass, foam,

and composites, and finds application in a variety of

industries, such as large CNC machining and CNC machining

aerospace parts. When speaking in terms of the machine itself,

the CNC machine definition is that it represents the actual

programmable machine that is capable of autonomously performing

the operations of CNC machining. Note the contrast between the

process (CNC machining definition) versus the machine (CNC

machine definition).

Subtractive manufacturing processes, such as CNC machining, are

often presented in contrast to additive manufacturing

processes, such as 3D printing, or formative manufacturing

processes, such as liquid injection molding. While subtractive

processes remove layers of material from the workpiece to

produce custom shapes and designs, additive processes assemble

layers of material to produce the desired form and formative

processes deform and displace stock material into the desired

shape. The automated nature of CNC machining enables the

production of high precision and high accuracy, simple parts

and the cost-effectiveness when fulfilling one-off and medium-

volume production runs. However, while CNC machining

demonstrates certain advantages over other manufacturing

processes, the degree of complexity and intricacy attainable

for part design and the cost-effectiveness of producing complex

parts is limited.

While each type of manufacturing process has its advantages and

disadvantages, this article focuses on the CNC machining

process, outlining the basics of the process, and the various

components and tooling of the CNC machine (sometimes

incorrectly known as a C and C machine). Additionally, this

article explores various mechanical CNC machining operations

and presents alternatives to the CNC machining process.

Overview of CNC Machining Process
Evolving from the numerical control (NC) machining process

which utilized punched tape cards, CNC machining is a

manufacturing process which utilizes computerized controls to

operate and manipulate machine and cutting tools to shape stock

material—e.g., metal, plastic, wood, foam, composite, etc.—into

custom parts and designs. While the CNC machining process

offers various capabilities and operations, the fundamental

principles of the process remain largely the same throughout

all of them. The basic CNC machining process includes the

following stages:

Designing the CAD model
Converting the CAD file to a CNC program
Preparing the CNC machine
Executing the machining operation
CAD Model Design
The CNC machining process begins with the creation of a 2D

vector or 3D solid part CAD design either in-house or by a

CAD/CAM design service company. Computer-aided design (CAD)

software allows designers and manufacturers to produce a model

or rendering of their parts and products along with the

necessary technical specifications, such as dimensions