Amino Presses and Equipment

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Amino Hot Stamping Presses

 

Hydraulic Press
Hydraulic Link Servo Press
Mechanical Link Servo Press
Slide Movement Speed
Better
Best
Best
Energy Savings
Good
Better
Best
Space Savings
Good
Better
Best
Sync with other Equipment
Good
Good
Best
Slide Position: Control and Precision
Good
Good
Best
Maintenance Costs
Good
Good
Better
Purchase Cost
Best
Better
Good

Link Servo Presses for Hot Forming

The link servo press features a four point link mechanism driven by either a hydraulic cylinder or an AC servo motor. The link mechanism magnifies slide pressing capacity while the hydraulic or servo system controls slide position, speed, and pressure.

Advantages

  1. Increased opening and closing speed
  2. Decreased maintenance costs
  3. Energy conservation
  4. Slide position control and precision

Cycle Time Advantages

Slide Movement Speed

Hydraulic presses have limited slide closing and opening speed, which can increase cycle time. The press motion curves for mechanical servo systems can be programed to offer faster slide closing and opening speeds while maintaining the ability to provide press tonnage on the closed die for long periods of time. The fast closing speed of mechanical servo systems can reduce cycle time and minimize blank cooling time prior to forming.

Pressure Response

The major disadvantage of hydraulic presses is that it takes some time for the hydraulic oil to compress to the desired pressure, which can increase cycle time. In contrast, developing maximum tonnage on a mechanical link servo press is quick and consistent.

Pressure Holding

Pressure holding at bottom for some length of time to quench the part is critical to the production accuracy in hot forming. Both hydraulic presses and mechanical link servo presses are able to easily hold pressure at bottom. A hydraulic press uses a great deal of energy to maintain the high cylinder pressures required to sustain high pressure at bottom, and the temperature of the oil can increase leading to maintenance issues. In contrast, a mechanical link servo press is able to hold pressure at bottom by using motor torque on the link mechanism with less energy consumption and maintenance concerns compared to a hydraulic press.

Operating Cost Advantages

Maintenance

The hydraulic circuits on a hydraulic press tend to require frequent maintenance due to leaks, heat generation, and oil contamination, and thus can be costly to operate. It is estimated the associated maintenance costs is 30% of a conventional hydraulic press because mechanical link servo presses do not have a hydraulic drive circuit, have fewer consumable components, and a more modular design.

Energy Conservation

During idle portions of the press cycle the servo drive motors use no power. The mechanical link servo press also features a power regeneration system that feeds energy generated from slowing the drive motors back into the grid. Actual field data has shown that the mechanical link servo press consumes 70% less power than a comparable hydraulic press.

Functionality

Servo systems offer greater functionality to the process by providing multiple programmable movements and speeds in a single operation. The programmable movements of the mechanical link servo press allow for in-die piercing, direct cooling, air cooling, and other potential functions to enhance part quality or faster cooling times.


Hydraulic Presses for Hot Forming

Hydraulic presses are commonly used to perform hot forming due to the need for the press to dwell on bottom with pressure, which cannot be achieved using a conventional clutch driven mechanical press. The Amino hydraulic press used in hot forming is a three cylinder press. The smaller centre cylinder allows the die to open and close faster as less oil is required for operation. The two outside cylinders kick in at or around bottom dead centre to apply high tonnage.

Advantages

  1. Lower initial investment

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