adt dressing presentation - ucsb · dressing station with nickel / diamond media resin – 4.6 ”...
TRANSCRIPT
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Why Dressing
Pushing
Free penetrating
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Dressed Blades VersusNon Dressed Blades
Low diamondexposure
Low machinability
High diamondexposure
High machinability
High loads
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Dressing
Dressing =Dressing =
• Exposing diamonds and releasing
partially embedded diamonds
•
Diamonds not exposed Diamonds exposed after
dressing
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Dressing
• Improving Concentricity of
blade edge to spindle rotation
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Dressing
• Shaping the edge geometry:
- Flat edge
- Special geometry:
(-V-, Others)
Flat edge
-V- edge
Angled cutAngled cut
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Dressing Methods
• Electro polishing - nickel blades
Blades
Etching solution
Power supply
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Dressing Methods
• Electro polishing - nickel blades
Cont.
Nickel blade
17mic. Grit - 330x / 1000x
after Electropolishing
Nickel blade
17mic. Grit - 100x
after Electropolishing
Nickel blade
17mic. Grit - 100xAfter fine grinding
with a Si. Ca. wheel
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Dressing Methods
• Cylindrical grinding:
Silicon Carbide wheel
Blade
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Dressing Methods
• Cylindrical grinding:
Cont.
Blade
Sil. Car. Grinding wheel
Flange
Arbor
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Dressing Methods
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Profile Grinding
Blade
Sil. Car. Grinding wheel
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Dressing / Grinding Machine
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Dressing / Grinding Machine
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Dicing Dressing Media's
• Silicon Carbide - 320 / 600 / 800 mesh• Silicon• Others - Glass, Ceramic• Diamond plates (For resin single & gang ass.)
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Dressing Resinoid Blades
• Not needed in most cases
- Self re-sharpening blade
Blade wearBlade wear
HighHigh
temperaturestemperatures
DiamondDiamond
ResinResin
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Dressing Resinoid Blades
• Lapping to open the blade side surfaces:
Double plate
Lapping
Machine
CarriersBlades
Top plate
Bottom plate
For applications requiring very straight / perpendicular cutsFor applications requiring very straight / perpendicular cuts
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Dressing Resinoid Blades
Cont.
15.5mm cut depth
Example of a thick PZT application:
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Dressing Metal Bond Blades
Hard NickelHard Nickel
Or metal sinteredOr metal sintered
Hard and Hard and
sharp edgessharp edges
Diamond (Blocky)Diamond (Blocky)
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Dressing Metal Bond Blades
• Dressing with dressing media’s on the saws:
Dressing media
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General dressing methods on the saw
• Cleaning powder residue to expose the
diamonds
• Machining off blade binder to expose
diamonds
Diamonds not exposed Diamonds exposed after
dressing
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General dressing methods on the saw
Cont.
• Flattening the blade edge
Before After
-- Lower the spindle RPMLower the spindle RPM-- Use multiple shallow cutsUse multiple shallow cuts
-- Use slow feed ratesUse slow feed rates
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On Line Dressing
Sil. Carbide or Al. Oxide
Dressing Stick.
Substrate
After each cut the blades is passing
a dressing media.
Feed
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Re - Dressing During the Dicing Process
Powder residuefrom the dicing
Blade edge
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Dressing on the dressing station
Dressing station
Silicon Carbide600 mesh
Nickel / Diamond
Electroforming17, 30 & 50 mic. grit
Chuck
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Dress station using a Nickel / Diamond media
• Designed only for dressing resinoid blades
• Should be used in a dicing mode not a
chop mode
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Dress station using a nickel /diamond media
Chopping modeChopping mode
Single diamonds in contactSingle diamonds in contact
with the blade edgewith the blade edge
NickelNickel--Binder Binder
Blade edge with a copyBlade edge with a copy
of the diamonds geometryof the diamonds geometry
Z movement OnlyZ movement Only
Dressing mediaDressing media
Nickel & DiamondsNickel & Diamonds
ResinoidResinoid
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Simulating the Chop mode
Metal file
Chop mode Shaping mode
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Dress station using a nickel /diamond media
Z Z –– Copping mode Copping mode ––
Wrong process Wrong process
Edge defects Edge defects
due due
to high loadingto high loadingResinoidResinoid
Dressing mediaDressing media
Nickel & DiamondsNickel & Diamonds
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Dress station using a nickel /diamond media
Y Y -- MovementMovement --
Stationary ZStationary Z
ResinoidResinoid ResinoidResinoidWear of blade edgeWear of blade edge
0.005- 0.015 mm
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Dress station using a nickel / diamond media
QUP -020-C045-N 00777/P-O.D.56 mm-Resin
n Line Dressingof iProfile images
Before After
· Dressing media P/N-00776-65D0-051-3X3 – 30mic grit
· Spindle Speed – 18 Krpm
· Feed rated – 5mm/sec
· Cut depth – 0.015 mm on each pass
5x–of cuts to achieve a flat blade edge . No
-W-
Cont.
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Dressing station with nickel / diamond media
QUP -020-6045-N 00777/P-O.D.”4.6–Resin
n Line Dressingof iProfile images
Before After
· Dressing media P/N-00776-65D0-051-3X3 – 30mic grit
· Spindle Speed – 8 Krpm
· Feed rated – 5mm/sec
· Cut depth – 0.015 mm on each pass
5x–of cuts to achieve a flat blade edge . No
-W-
Cont.
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Dressing station with nickel /diamond media
Nickel or Metal sintered
Blade binder
Nickel / diamond dressing
block
Damaged diamonds
Diamonds remaining
in contact
with diamonds
Dressing a metal bond blade on a Dressing a metal bond blade on a
nickel / diamond dressing media:nickel / diamond dressing media:
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Dress station using a Silicon Carbide media
• Designed for light / moderate dressing
• Used similar to standard dressing media
which is mounted on the chuck
• To clean powder residue on metal or resin
type blades
• Can be used for flattening blades edges,
mainly resinoid - (Slower mode)