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8/8/2019 MicroWaterJetIncluyeImagenesMM Live 5-12-2010
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Defining Precision:
Revolutionary Abrasive Waterjet Technology
Presented by
Walter Siegenthaler
Executive Vice President
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WATER JET CUTTING FOR
MICRO AND HIGH PRECISION PARTS
Defining Precision
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Todays Topics:
Comparing conventional cutting methods
Avoiding heat affected zones
Abrasive Waterjet process/ technology
Solutions using collaboration of processes Selecting the right material
The future of precision abrasive water jet cutting
Defining Precision
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Defining Precision
Comparing traditional cutting methods:
Wire EDM
Conventional Laser Cutting
Waterjet Cutting
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Definite Precision
Shameless Disclaimer
The specifications stated in this presentation
are averages based on my own research of
information provided by various
manufacturers and service providers.
You may have seen or experienced different
data yourself.
Please feel free to speak with me after the
presentation.
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Defining Precision
Wire EDM advantages:
Extremely accurate process
Able to cut multiple parts in a stack
No burr on cutting edge
Virtually no edge taper
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Defining Precision
Wire EDM disadvantages:
Cutting process is slow as compared to other processes
Leaves heat affected zones in material
Leaves recast layer on material
Non-conductive materials can not be cut using EDM Large quantity production is cost effective, prototypes
are expensive to produce
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Defining Precision
Conventional Laser Cutting advantages:
Fast cutting speeds
Accurate beam positioning
Beam width (kerf)
No wear on the beam - consistent results
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Defining Precision
Conventional Laser Cutting disadvantages:
Stacking material is not practical
Leaves heat affected zones in material
Leaves recast layer on material
Some materials are not compatibleCan be a high consumer of energy
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Defining Precision
Heat Affected Zones may cause problems
Additional processes such as heat treating may have to be
performed to reverse the HAZ
Materials such as spring steel will have changed molecular
structure
Material may show cracking in these areas
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Defining Precision
Conventional Abrasive Water Jet characteristics:Mechanical Energy
Parts Accuracy 0.1mm
Minimum Inside Radius 0.4mm
Minimum Hole Diameter 0.8mm
Kerf width 0.8mm (few now as low as 0.5mm)
Thickness Range 5mm to ~ 300mm
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Defining Precision
Conventional Abrasive Water Jet advantages:
Fast cutting speeds
Capable of cutting thick material
Roughing process for milling
No Heat Affected ZonesNo recast layer
Virtually any material can be cut using AWJ
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Defining Precision
Conventional Abrasive Water Jet disadvantages:
Thicker material often shows taper
Wet process problematic to some materials
Often only usable as roughing process
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Defining Precision
Micro WaterJet characteristics:Mechanical Energy
Parts Accuracy 0.01mm
Minimum Inside Radius 0.15mm
Minimum Hole Diameter 0.30mm
Kerf width 0.3mm AWJ
Kerf width 0.08mm WJ
Thickness Range 0.01mm to ~100mm
Conventional AWJ:Same
0.1mm
0.4mm
0.8mm
0.8mm (few now 0.5)
0.25mm
5 mm up to 300 mm
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Defining Precision
D_mixL_
mix
D_kol
L_
kol
a_
abr
D_
abr
Da_foc
alpha
c
bD_cone
L_
cone
collimationtube
orifice
abrasive connection
mixing chamber
head body
focusing tube
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Defining Precision
Take advantage of the resources available to you Use multiple processes to increase precision of your part,
reduce waste and handle the product as little as possible.
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Defining Precision
Take advantage of the resources available to you Use multiple processes to increase precision of your part,
reduce waste and handle the product as little as possible.
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Defining Precision
Take advantage of the resources available to you Use multiple processes to increase precision of your part,
reduce waste and handle the product as little as possible.
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Defining Precision
Take advantage of the resources available to you Use multiple processes to increase precision of your part,
reduce waste and handle the product as little as possible.
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Defining Precision
Select the right material for the right applicationDuring the design stage, be aware of how your material can be
processed for production
Create a partnership with a contract manufacturer who will work
closely with you and is willing to advise during design changes
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Defining Precision
Ceramic (0.25 mm wide slice) 7mm thick work piece
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Defining Precision
PTFE
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Defining Precision
Neoprene
20 mm
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Defining Precision
Delrin
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Defining Precision
Phenolic
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Defining Precision
Carbon steel
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Defining Precision
Stainless Steel
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Defining Precision
Titanium
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Defining Precision
Hyperco 50
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Defining Precision
Nitinol
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Defining Precision
Spring Steel
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Defining Precision
Sterling Silver
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Defining Precision
Plans for advances in Micro Waterjet technology: Reducing the kerf from 0.3mm to 0.2mm (2010)
Reducing the kerf to 0.1mm
Tilt head with same precision
Addition of a rotary axis for cutting parts in the round With this, the addition of 3-Dimensional CNC software will
be a necessity
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Defining Precision
Thank you for your time andattention!