Why Do You Need a Small Servo Press?

Posted on Jan 5, 2021

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Small Servo Press

Small servo presses, like the standard servo machine, come in various forms, such as servo motor ball screw press and many other subtypes. These small servo presses repeat the pressing cycle by pushing the forming tools against the workpieces upward or downward under the generated high pressure.

What Is a Small Servo Press?

A Small servo press is the compact version of a servo motor-driven press machine which is designed for deforming and shaping metal parts with a series of dies or plates. The deformation equipment is driven by an electric motor, eliminating the need for flywheel, clutch, brake, and other components in conventional press machines. The compact design of the small servo presses with the high performance in control and metal deformation makes the press machine a popular choice in modern shops. These small servo press machines are also widely called compact electric servo presses.

Regulating the speed of press equipment and the pressurization count was challenging for the mechanists when using a conventional mechanical press machine. With the invention and development of the servo press in the 1990s, more complex control in relation to the operating rate became possible with the CNC system and the electric motors. Servo press machines can offer full energy at different speeds as the operators need, but not full press capacity at every stage throughout the entire stroke. With a small servo press, operators can set the desired pressing rate, positions, as well as pressure applied onto the workpieces utilizing numerical values.
 

Applications of Small Servo Press

Small servo press machines in the market are available for high processing loads and a broad range of forming applications in the stamping stroke. The capability of this compact press allows more complex profiles and tight tolerance in dimension accuracy for different industrial manufacturing applications. Compared to both the mechanical press and other larger servo press machines, small servo presses not only save space but also the effort in maintenance. Also, the metal deformation process in the compact equipment is reliable and quiet, making it popular for automotive, high precision manufacturing, and many more industrial applications.
 

:: Read More: An Introduction to Electric Servo Press

How Does a Small Servo Press Work?

Small servo presses, like the standard servo machine, come in various forms, such as servo motor ball screw press and many other subtypes. These small servo presses repeat the pressing cycle by pushing the forming tools against the workpieces upward or downward under the generated high pressure. At a predetermined speed, the powered tools, which are the upper and/or bottom dies or plates, will deform the metal parts and create desired shapes with critical dimension accuracy. The pressure mentioned here is generally created and transferred from a hydraulic system. Following is the introduction of the features of two of the subtypes of small servo press.
 

Small Servo Hydraulic Press

The small servo motor-driven hydraulic press is the combination of a servo motor and a fluid actuating system where the motor optimizes the fluid management and the processing speed of the small servo press. The energy consumption of the small servo press is efficient, and the consistent pressure in the hydraulic system generates stable and powerful deforming force in the press. The higher sliding speed of the tools can be achieved in this advanced servo press machine, making the equipment suitable for molding, punch pressing, forging, and complex, high precision applications.
 

Small Servo Ball Screw Press

The ball screw is used to minimize the friction in the system in a small servo ball screw press. The ball screw drive is the mechanical gadget that is utilized to convert rotational motion into linear motion in the small servo press. The device has a long, threaded shaft and ball bearing to support the considerable stress and weight to ensure a smooth metalwork process. With the servo motor, the full slide rate, as well as maximum force, can be applied at any required position, unlike the mechanical press. The press is an ideal solution for applications requiring fast motions at the end of the process, or longer strokes.
 

Benefits of Small Servo Press

The small servo press brings numerous benefits which make the press machine an invaluable investment for a wide variety of metal deformation applications:
 

Saving Space & Energy

The most evident advantage of the small electric servo press is the compact structure which is downsized to be similar to the size of a standard hydraulic press. The size makes the servo press a space-saving as well as an environmentally-friendly solution for the mechanists since it also saves energy by utilizing servo motor technology.
 

Handling Difficult & Complex Pressing

With the upgraded rigid design and the servo control of the position and processing speed, these small servo press machines are able to handle modern high-strength materials. Today, servo press machines have become must-have equipment for forming titanium, aluminum, and even carbon fiber reinforced plastics and many more high tension sheets of steel, which are generally considered very challenging to handle in conventional press machines.
 

Setting the Speed & Position

A strong benefit of the servo press technology is the ability to predetermine the value of the processing speed, pressure, and position in the forming tasks. In addition to the speed, the maximum force, which originally is applied to the center of the dies in the conventional presses as the loads increase gradually to slowly build the power, can also be controlled in a small servo press. Also, the operator can also predetermine the position of the forming unit. The critically-controlled slide movements in small servo presses can remove the need for many secondary operations, increasing efficiency and productivity. 

Take stamping sheet metal with a complex die, for example, the small electric servo press can maintain the consistent processing speed, preventing excessive force to be applied onto certain areas of the sheet, otherwise, it may end up with poor forming quality. This is also the reason that the conventional machine press carefully forms the metal parts with a slower speed. Different from the conventional ones, the small servo press machine allows a higher processing speed which can be gradually lower when getting close to the center of the bottom die.

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