Upgrading Air-Over-Oil Cylinders with the Hybrid Electro-Hydraulic Actuator

Air-Over-Oil Cylinders

Air-Over-Oil cylinders are often used in Press applications. Examples include:

• Assembly presses
• Metal forming – Various processes:
• Bending
• Staking
• Punching and Piercing
• Coining
• Swaging
• Composite forming presses
• And many others…

Air-Over-Oil cylinders incorporate a fast extend stroke, slow load stroke, and fast retract stroke however, there are a number of disadvantages with Air-Over-Oil technology including:

• Require inefficient compressed air resulting in high energy consumption
• Control of position and applied force is difficult and not precise
• Require significant maintenance with unscheduled downtime
• Leaky seals result in drifting and not holding position
• Do not allow programmable acceleration/deceleration profiles that can avoid damaging material and tooling

Kyntronics Hybrid SHA Advantages:

• All Electric: eliminates pneumatic and hydraulic connections.
• All-In-One Solution: high-speed and high-force actuator in an integrated package.
• Energy Savings: only uses power on demand – eliminates the requirement for compressed air.
• Precision: precise control of position force, accel/decel and speed – provides quality cycle pass/fail data and reduces tool wear.
• Programmable: fully programmable extend stroke, load stroke and retract stroke, reduces cycle time.
• Minimal maintenance: totally-sealed system eliminates leaks and contamination.

The SHA combines the Best Features of Screw-Type EMAs and Hydraulic Actuators while Eliminating their Shortcomings

Hybrid Electro-Hydraulic Actuator