Radial Verpressen was heit das

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UNIFLEX Hydraulik GmbH
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UNIFLEX Hydraulik GmbH
Radial Crimpers Cold Forming of round work
pieces Joining and Calibration
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UNIFLEX

• 1972 Foundation of UNIFLEX
• Machines for the Production of Hose Assemblies
• 1992 Take over by the group Freiherren Waitz
• 1995 First project for crimping of long rod
  insulators
• 1996 Move to Karben
• 1998 UNIFLEX of America Ltd.
• 2000 New proportional valve technology for force
  controlled crimping
• 2004 UNIFLEX-Hydraulik Asia Pacific Ltd. Pte.

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Radial Crimping

• Eight Crimp dies
• Always exactly round by geometric locking between
  crimp dies
• enables intermediate stopping positions
• Central symmetric closure

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Applications

• Hydraulic Hoses (since the 60s)
• Cable Joints
• Automotive Hoses

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Applications

• Concrete Bars
• Metal Strings
• Vibration Dampers

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Long Rod Insulators
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Long Rod Insulators
Axial Pull Strength Normal Tension x Friction
Factor x Contact Area
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What can be joined?
Metal
Non-Metal

• Metal and Non-Metal
• Hydraulic hoses
• Long rod insulators
• Metal and Metal
• Cable joints
• Concrete bars

Metal
Metal
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Holding Radial Tensions
s
sN
Ext. Tube Part
Inner Part
Elastic diameter reduction of inner tube part
Elastic diameter widening of external tube part
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Thermal Shrinking
s
Ext. Tube Part
20C
100C
60C
40C
80C
sN
sN
Inner Part
sN
sN
Ø
Shrinking
100C
20C
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Crimping
sI
Over Compression
sN
s
20C
sN
Ext. Tube Part
Inner Part
Plastic Deformation
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Shrinking Tolerances
s
External Tube Part
20C
100C
sNmax
Ds
sNmin
Inner Part
Ø Tolerance relative to each other
100C
20C
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Crimping
sI
Over Compression
sN
s
20C
sN
Ext. Tube Part
Inner Part
Plastic Deformation
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Comparison Shrinking - Crimping

• Shrinking
• very depending on tolerance of material
• long cycle time
• Crimping
• Over compression
• very good control of normal tension
• short cycle time (5 s)

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Standard Stop Criteria
Pressure Stop
Travel Stop
Pressure
Travel
Time
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Special Stop Criteria
Characteristic Force History
Characteristic Noise History
Force
Noise
time
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Controlling vs. Monitoring
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Lubrication-free Technology
Fhydr Fcrimp
For Pressure / Force Control
100
Fcrimp
-10
High Linearity
Fhydr
100
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Product Range
Crimp Diameter up to 400 mm Crimp Field Length up
to 200 mm Crimp Force up to 600 t Opening Travel
up to 280 mm Tolerance of Stop lt 0,1 mm lt 10
kN
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Future

• Hollow Core Insulators
• Electric Tubes

• Crimping more independent of tolerances
• Short Cycle Times

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Thank you
UNIFLEX Hydraulik GmbH Robert-Bosch-Str.
50-52 61184 Karben Germany
UNIFLEX of America Ltd. 2081 E.Center
Circle Plymouth, MN 55441 USA
UNIFLEX Hydraulik Asia Pacific Pte.Ltd Unity
Center No.51 Bukit Batok Crescent 07-25 658077
Singapore