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MACHINE TOOLS ANDMACHINING
LAB PRESENTATION
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GROUP PARTNERS
Muhammad Waseem (2009-ME-388)
Waseem Mushtaq (2009-ME-363)
Khurram Asslam (2009-ME-398) Rashid Sikander (2009-ME-351)
Kashif Shabbir (2009-ME-373)
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PRESENTATION TOPIC
MILLING MACHINE
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Introduction
Invented and developed by Eli Whitney.
Although crude, these machines assisted man in maintaining
accuracy and uniformity while duplicating parts that could notbe manufactured with the use of a file.
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Operations
Milling operations may be classified under four general
headings as follows:
Face Milling Plain or Slab Milling
Angular Milling
Form Milling
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FACE MILLING
Face milling, also called end milling and side milling,
is machining surfaces perpendicular to the axis of the
cutter.
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Plain Milling or Slab Milling
In plain milling machining machine flat surfaces
which are parallel to the axis of the cutter.
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Angular Face Milling
Angular face milling is a machining in which machine
flat surfaces which are at an inclination to the axis of
the cutter.
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Angular Milling
In Angular milling machining is being done at a
specific angle to draw out specific shapes.
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Gang Milling
Gang milling is the term applied to an operation in
which two or more milling cutters are used together
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Straddle Milling
When two or more parallel vertical surfaces are machined at a
single cut, the operation is called straddle milling. Straddle
milling is accomplished by mounting two side milling cutters
on the same arbor, set apart so that they straddle the
workpiece.
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Form Milling.
Form milling is the process of machining special contours
composed of curves and straight lines, or entirely of curves, at
a single cut. This is done with formed milling cutters, shaped
to the contour to be cut, or with a fly cutter ground for the
job.
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Woodruff Keyway Milling.
Keyways are machined grooves of different shapes, cut along
the axis of the cylindrical surface of shafts, into which keys are
fitted to provide a positive method of locating and driving
members mounted on the shafts.
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Gear Cutting.
Gear teeth are cut on the milling machine using formed
milling cutters called involutes gear cutters. These cutters are
manufactured in many pitch sizes and shapes for different
numbers of teeth per gear
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Drilling And Boring.
Drilling is to make a hole and boring is to enlarge a hole .
BORING DRILLING
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Speeds For Milling Cutters
The speed of a milling cutter is the distance in feet per minute
that each tooth travels as it cuts its chips.
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Cutting Oils.
The major advantage of a cutting oil is that it reduces
frictional heat, thereby giving longer life to the cutting edges
of the teeth. The oil also serves to lubricate the cutter face
and to flush away the chips, consequently reducing the
possibility of marring the finish.
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2nd presentator
WASEEM MUSHTAQ ( 2009-ME-363)
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COMPUTERISE NUMERICAL
CONTROL Most CNC milling machines (also called machining centers) are
computer controlled vertical mills with the ability to move the
spindle vertically along the Z-axis. This extra degree of
freedom permits their use in die sinking, engraving
applications, and 2.5D surfaces such as relief sculptures.
When combined with the use of conical tools or a ball nose
cutter, it also significantly improves milling precision without
impacting speed, providing a cost-efficient alternative to most
flat-surface hand-engraving work.
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BENEFITS OF CNC MACHINES
CNC Turning Is Beneficial.
CNC Machining Automates Industry.
CNC Machine Functioning.
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CNC Turning Is Beneficial
Mankind is continually looking for ways to make his
undertakings more efficient and productive. You cannot
dispute that modern technology gives us the hindsight to
eliminate redundant operations on an industrial scale,
thereby saving on production costs. One such method is CNC
turning. CNC turning is a facile method of machining by which
parts are cut
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CNC Machining Automates
Industry The introduction of CNC machining radically changed the
manufacturing industry. CNC is an abbreviation that means
computer numerical control. This computer controller reads
G-code and M-code, transmitting commands and driving a
machine tool. It numerically directs a cutting tool in the work
envelope of a machine tool
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CNC Machine Functioning
CNC machining, as a recent innovation in the
sphere of current technologies, may be of
great interest for those who intend to turn to
the help of CNC machines. Generally CNCmachines are combined into one station called
a "cell." Today, they are directly controlled
from files created by CAM software packages.
http://www.current-technology.net/cnc-machining/cnc-machines-functioning/Recommended