Tài liệu Cutting Tools P16 pptx
Tài liệu Cutting Tools P16 pptx
... 16
Grinding Wheels
and Operations
Metal Removal
Cutting- Tool Materials
Metal Removal Methods
Machinability of Metals
Single Point Machining
Turning Tools and Operations
Turning Methods and Machines
Grooving ... are now used
for grinding tough and very hard
steels, cemented carbide, and alumi-
num oxide cutting tools.
The synthetic diamond crystals
shown in Figure 16.3a can be manufac-...
Tài liệu Cutting Tools P1 pptx
... also called Hot
Hardness
Toughness: Toughness of cutting
tools is needed so that tools don’t chip
or fracture, especially during interrupt-
ed cutting operations.
Wear Resistance: Wear resistance
means ... Wear resistance
means the attainment of acceptable tool
life before tools need to be replaced.
The materials from which cutting
tools are made are all characteristically
hard...
Tài liệu Cutting Tools P4 pptx
... insert, behind
the nose.
4.5 Cutting Conditions
After deciding on the machine tool and
cutting tool, the following main cutting
conditions have to be considered:
• Cutting speed
• Depth of cut
• ... metal cutting. Except at the
beginning and end of the cut, the forces on the cutting tool and the tool tip temperature
are essentially constant. For the special case of facing, the vary...
Tài liệu Cutting Tools P10 pptx
... between
the cutting depth and the size of the
nose radius. If the cutting depth is
smaller than the nose radius, the
radial cutting forces will increase
with increased cutting depth. If the
cutting ... the machine
at a cutting depth that is greater than
the desired cutting depth compen-
sates for the radial deflection. When
cutting begins, the radial cutting
force reduces th...
Tài liệu Cutting Tools P2 ppt
... of the
cutting tool, are dependent on the multi-
tude of cutting conditions and especial-
ly on the cutting speeds and cutting flu-
ids.
Aside from the sudden premature
breakage of the cutting ... Single Point Cutting Tools
The metal cutting tool separates chips
from the workpiece in order to cut the
part to the desired shape and size. There
is a great variety of metal cuttin...
Tài liệu Cutting Tools P3 pdf
... careful selection of
cutting geometry and speed. Positive
rake tools are often preferred on these
materials to minimize part deflection
and to reduce cutting temperatures in
the cutting zone. The ... when cutting cast iron.
Tool life may be defined as the peri-
od of time that the cutting tool performs
efficiently. Many variables such as
material to be machined, cutting tool
mat...
Tài liệu Cutting Tools P5 pdf
... relatively
unskilled person for mass producing machined parts. The cutting tools were preset, or
“set up” by a skilled machinist, and usually several cutting tools were in operation at the
same time, reducing ... cuts.
• Combined cuts can be made; tools on
the cross slide can be used at the same
time that tools on the turret are cutting.
• Rigidity in holding work and tools is...
Tài liệu Cutting Tools P7 doc
... diagram
Velocity
40°
Cutting
stroke
220°
140°
Return
stroke
1.0
1.6
R
e
t
u
r
n
Velocity diagram
Forward cutting speed
Return speed (b)
Velocity
Return
stroke
(faster)
Shaper ram
Cutting
stroke
4-way
valve
Pump
Tank
Motor
Base
Ram ... single point tools and cut only in straight lines. They
both make the same types of cuts.
The shaper handles relatively small work. The planer handles w...