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8/3/2019 Hydraulic vs Mechanical
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IMPROVE YOUR PRESS SHOP TECHNOLOGY
Hydraulic Press vs Mechanical Press
1
Hydraulic Pressversus
Mechanical Press
www.hydraulico.com
8/3/2019 Hydraulic vs Mechanical
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IMPROVE YOUR PRESS SHOP TECHNOLOGY
Hydraulic Press vs Mechanical Press
2
Hydraulic press
Single-acting
Single-acting with passive cushion
- In bed or ram
Double-acting with inner ramDouble-acting with active cushion
(single acting press with active cushion)
Triple-acting with inner ram and active bed cushion
Triple-acting with passive ram cushion andactive/passive bed cushion
(single-acting press with active cushion in ram and bed)
Mechanical press
Single-acting
Single-acting with passive :
- air cushion in bed/ram
- hydraulic cushion in bed
Double-acting (inner and outer ram)
- passive cushion, pneumatic or hydraulic
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Hydraulic Press vs Mechanical Press
3
DEEP
DRAWING
PUNCHING
PIERCING
A B I L I T Y
FORMING FLANGING RESTRIKE EMBOSSING TRIMMING BANKING
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IMPROVE YOUR PRESS SHOP TECHNOLOGY
Hydraulic Press vs Mechanical Press
4
Hydraulic presses versus mechanical presses
DEEP
DRAWING
PUNCHING
PIERCING
A B I L I T Y
FORMING FLANGING RESTRIKE EMBOSSING TRIMMING BANKING
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IMPROVE YOUR PRESS SHOP TECHNOLOGY
Hydraulic Press vs Mechanical Press
5
Hydraulic presses versus mechanical presses
DEEP
DRAWING
PUNCHING
PIERCING
A B I L I T Y
FORMING FLANGING RESTRIKE EMBOSSING TRIMMING BANKING
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IMPROVE YOUR PRESS SHOP TECHNOLOGY
Hydraulic Press vs Mechanical Press
6
DEEP
DRAWING
PUNCHING
PIERCING
A B I L I T Y
FORMING FLANGING RESTRIKE EMBOSSING TRIMMING BANKING
8/3/2019 Hydraulic vs Mechanical
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Hydraulic Press vs Mechanical Press
7
Deep drawing
Function Hydraulic press DA Mechanical press DA
Forming force Full tonnage at full stroke Limited tonnage at limted stroke
Emboss force Adjustable in tonnage Restricted to position
Blankhold force Adjustable during stroke(overload control of blank and press)
Restricted to position(overload control only on press)
Forming speed Adjustable during stroke Fixed curve
Dwell at BDC Programable Not available
Forming down Yes Yes
Forming up Yes No
Die wear Good Bad
Limitations PPM Depth of part, complexity of part
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Hydraulic Press vs Mechanical Press
8
Blanking and trimming
Function Hydraulic press DA Mechanical press DA
Blanking force Full tonnage Full tonnage available
Surface quality of cut Good Better
PPM Medium High
Shock Shock absorbers needed Small
Die wear Medium Medium
Energy High Low
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Hydraulic Press vs Mechanical Press
9
Other characteristica
Hydraulic press
• The programable forming speed and blankholderforce are optimum
• Programable impact at die closing
• Flexibility to die hights• Die change: index 100
• Run in die : index 100
• Fast and simple repair
• Best for low and medium batch quantities
• Cycle time 5 sec+handling 2,7-4 sec
• ( 6.6- 8 PPM)
•
Dynamic force control + 1 PPM ( 3 cyl action)• Leaks belongs to the past
• LOW Investment
Mechanical press
• Link presses are more versatile than excentricdriven presses.
• Excentric presses gives high impact speed at die
closing ( bad draw condition. Bad for die, cushion,clutch and brake.
• Limitations to die hights ( max +/-300 mm)
• Die change: index 125 - 150
• Run in die: index 150 - 300
• Best for high batch quantities
• Cycle time 3.5 sec+handling 2.5 – 4 sec
• (8-12 PPM)
• Expensive and slow to repair
• Risk factor is high in case of break down
• HIGH Investment
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10
TRENDS in automotive
• 40 years ago: Hydraulic press lines (flexibility, low volume, complex part
geometry)
• 20 years ago: Mechanical presses (high volume, simple part geometry)
• Last 10 years: Hydraulic and mechanical press lines (just in time or high volume)
Future requirements:
• Just In time > smaller runs > short change over time & flexibility
• Low weight > High strength steel: sensible controllable forming speeds
•
Synchronised load and unload
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11
Thank you for watching this presentation
Hydraulico as
Raadhusgade 87 · 8300 Odder · Denmark
Tel.: +45 8780 2000 Fax: +45 8780 2001
E-mail: [email protected]
www.hydraulico.com