Editorial team · Machine tools
InfoWeb Marketplace · Editorial team
Published on 23 September 2011 · 2 min read
ROBA®-linearstop: a safety brake for axes with linear movements
InfoWeb Marketplace · Editorial teamPublished on 23 September 2011 · 2 min read
Most brakes currently available on the market act purely as clamping elements. Designed only to secure axes at standstill, they do not meet the requirements of dynamic braking procedures. The ROBA®-linearstop, by contrast, is a safety brake that fully complies with the industry specifications. It ensures reliable dynamic braking of moving axes.
The dynamic safety brakes of the ROBA®-linearstop series operate on the fail-safe principle. The braking force is provided by pneumatic springs and transmitted smoothly via the conical surface of a sleeve. The sleeve permanently grips the brake rod without changing its position. In the closed position, the brake is able to support loads in both directions of travel. Dynamic braking can be carried out at maximum sliding speeds of 2 m/s.
The dynamic stops were tested according to the industry test requirements on the mayr® drop test bench. In line with the industry specifications, the tested components are triggered one million times statically and without load, and one million times under load. Every thousand triggerings, the components are braked dynamically. The ROBA®-linearstop brake unit was subjected to 30 000 dynamic braking fatigue tests at maximum load and therefore proves to be significantly superior to the requirements of the industry specifications, which stipulate only 1000 dynamic braking tests.
The ROBA®-linearstop safety brakes can be mounted directly on standard cylinders according to DIN ISO 15552. They can also be integrated simply, quickly and without adjustment work into various drive configurations. Unlike other brake systems, the ROBA®-linearstop does not need to move with the carriage. The pneumatic connections are therefore simplified. The brake can be screwed onto a static element of the machine. The cylindrical piston rod is guided in the central cavity of the brake and connected to the linear drive carriage.
When the carriage moves, the piston rod enters the ROBA®-linearstop axially. When the brake closes, the carriage is braked dynamically and then brought to a stop smoothly and without play, with precise positioning. The axis is secured in both directions of travel. The brake is released by pneumatic pressure of 4 to 6 bar, depending on the specified braking force. The ROBA®-linearstop brake unit is available in four sizes, offering holding forces from 1,5 to 40 kN.
The dynamic safety brakes of the ROBA®-linearstop series operate on the fail-safe principle. The braking force is provided by pneumatic springs and transmitted smoothly via the conical surface of a sleeve. The sleeve permanently grips the brake rod without changing its position. In the closed position, the brake is able to support loads in both directions of travel. Dynamic braking can be carried out at maximum sliding speeds of 2 m/s.
The dynamic stops were tested according to the industry test requirements on the mayr® drop test bench. In line with the industry specifications, the tested components are triggered one million times statically and without load, and one million times under load. Every thousand triggerings, the components are braked dynamically. The ROBA®-linearstop brake unit was subjected to 30 000 dynamic braking fatigue tests at maximum load and therefore proves to be significantly superior to the requirements of the industry specifications, which stipulate only 1000 dynamic braking tests.
The ROBA®-linearstop safety brakes can be mounted directly on standard cylinders according to DIN ISO 15552. They can also be integrated simply, quickly and without adjustment work into various drive configurations. Unlike other brake systems, the ROBA®-linearstop does not need to move with the carriage. The pneumatic connections are therefore simplified. The brake can be screwed onto a static element of the machine. The cylindrical piston rod is guided in the central cavity of the brake and connected to the linear drive carriage.
When the carriage moves, the piston rod enters the ROBA®-linearstop axially. When the brake closes, the carriage is braked dynamically and then brought to a stop smoothly and without play, with precise positioning. The axis is secured in both directions of travel. The brake is released by pneumatic pressure of 4 to 6 bar, depending on the specified braking force. The ROBA®-linearstop brake unit is available in four sizes, offering holding forces from 1,5 to 40 kN.
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