Page 1026 - Tungaloy Catalog

Technical Reference
Chipbreaker
Chip controllability

Necessity of chip control (Problems and effects)
Necessity of chip control Problems Effects
1. Scattering of chips and 1. Disturbs unmanned and automated machining.
coolant. 2. Disturbs high-speed and high-efficiency machining.
2. Wrapping around the 3. Degrades finished surface.
workpiece and the tool.
3. Accumulation on the tool, jig, 4. Threatens operator’s safety.
ᶃWhy is chip control needed? and machining facilities. 5. Reduced operation rate.
ᶄ Effect of improper chip control Additional problems when
chips are not properly
controlled

ᶃWhy is chip control needed? ᶄ Effect of improper chip control
What is a chip? • Defective work.
Effects on quality • Defective surface finish
• Chip entangling
An unwanted piece of metal that is removed from • Increased number of man-hours for handling.
a workpiece. Chips are formed when a tool cuts or Effects on operation • Increased tool costs.
grinds metal. • Troublesome chip handling.
• Machine stoppage and reduced operation rate.
• Strain and damage on machine caused
Effect on safety
Problems when chips and health. from improper carrying-out of chips.
are not properly • Dangerous effects on the human body.
(Injury and burns on hand, etc.)
controlled
Effective measures “Chipbreaker”

Chip shape

Classi- fication Depth of cut: small Depth of cut: large Description of Acceptability Effect
chip shape
Chips irregularly • Wrapping around the tool or workpiece or
entangled
Shape A Not acceptable • Possible damage to the machined surface
accumulation around the cutting point,
hindering cutting

Long continuous • Bulky during transport in the automatic
spiral chips
line
Shape B R 50 in • May be preferred when one operator
Technical Reference Shape C Short spiral chips • Smooth chip flow
handles one machine

• Difficult to scatter
R 50 in
• Favorable shape

14 "C" or "9" shaped Acceptable • Favorable shape if not scattering
Shape D chips (Around one • Not bulky and easy to transport
coiling)

Excessively broken • Readily scattering. If scattering is the only
Shape E connected in a form Not acceptable • Tend to cause chatter, causing harm on the
chips. Thin pieces or
trouble, it may be acceptable because the
chip cover, etc. may be used.
of wave as shown in
the figure left finished surface roughness or tool life.

14–8