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Metal bellows couplings
Stiff and flexible

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Plant Construction, Engineering & Components
Jakob Antriebstechnik
Bild: Jakob Antriebstechnik

It has proven itself on the market for decades and is a tried and tested standard series of metal bellows couplings: The metal bellows coupling KM from Jakob Antriebstechnik. Like all metal bellows couplings, it is stiff in the direction of rotation, but flexible in the axial, angular and radial directions. Despite the similarities, however, metal bellows couplings sometimes differ greatly from each other. The technical differences are, for example, in the choice of the bellows or the connection of bellows and hub or bellows and shaft. The company uses only thin-walled, multi-layered bellows made of certified stainless steel sheets. This causes a high torsional stiffness, which ensures high positioning accuracy and concentricity even under difficult conditions, which guarantees absolutely backlash-free torque transmission between the input and output shafts. The multi-layer bellows design also causes the absorption capacity of large shaft displacements with still small restoring forces. This means an increase in reliability, safety and service life.

The clamping hub of the KM is equipped with the innovative Easy-Clamp-System, which allows a simple, with enough fit clearance, sliding. The necessary preload force for torque transmission is ensured here by a single, radially accessible screw per hub. This simple and reliable connection allows uncomplicated installation in a few steps, even in confined spaces. To achieve the lowest possible moment of inertia, the hubs are made of high-tensile strength aluminum.

The bellows and hubs are connected using the brass-wire press-fit method. In contrast to adhesive bonds, this joining process has unlimited fatigue life under critical operating conditions (-40 ° C to + 200 ° C, chemicals, etc.) and can safely introduce the transmission torque of each bellows layer into the hub.

KM series metal bellows couplings are available with nominal torques from 0.4 to 1300Nm.

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Power Supply Product
Bi-directional DC-DC converter series has extended voltage

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2.5kW Bi-directional DC-DC converter series has extended voltage and temperature ranges
Picture: TDK

TDK Corporation (TSE 6762) announces the introduction of the EZA2500W-32048 TDK-Lambda brand bi-directional DC-DC converter model to its EZA series. The extended high voltage range now covers 260 to 400Vdc and the lower voltage 36 to 65Vdc. The operating temperature has been increased to -10 to +50°C. Double sided protective board coating and long-life dust resistant fans have also been included.

Designed for energy storage systems with rechargeable batteries, this 2500W digitally controlled, compact 1U power supply can seamlessly change conversion direction from high voltage dc sources, powered by solar or wind, to 48Vdc batteries and vice versa. Other applications include lithium-ion battery testing as well as the use of regenerated energy from robots, cranes, autonomous ground vehicles and lifts. The EZA2500 can be used to replace large power resistors currently used for lift braking and use that previously dissipated energy to charge batteries. That stored energy can be used to either provide peak power for high torque demands or as battery back-up for power cuts.

The output voltage and current can be programmed and monitored using the RS-485 communications port. Multiple units can be operated in parallel by using the RS-485 interface to set units for “droop mode” current share. Alarm signals are also accessible, as well as remote on/off and under/over voltage functionality. The high voltage (grid) to low voltage (battery) isolation is 3,000Vac, grid to ground 2,000Vac and battery to ground 500Vac.

The dimensions for the EZA2500 are 43.6mm (1U) high, 423mm wide and 400mm deep. All models in the EZA series are certified to the IEC/EN/UL 60950-1 and IEC/EN/UL 62368-1 safety standards with CE marking for the Low Voltage, EMC and RoHS Directives. A five-year warranty is standard.

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Smart Glasses
Modern Customer Support

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Modern Customer Support with BEUMER Smart Glasses

Malfunctions and standstills that occur during manufacturing, further processing or dispatch, may become expensive for a company. Beumer Smart Glasses are a cutting-edge product providing fast and easy support. Beumer receive a video of asituation and are able to identify and solve the problem.

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New information
Industry 4.0 progress

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In an ordinary year, PI (Profibus & Profinet International) would already – and once again – have presented its progress on Industry 4.0 work at the Hanover Fair – but this is no ordinary year. Nevertheless, the working group experts are working tirelessly on implementing concepts like the use of Profinet over TSN, fail-safe machine-to-machine communication and information models for vertical communication – virtually and at a safe distance, of course.

Obviously, this is not an easy time for an organization which has committed itself to the networking of automation systems, and especially also those of technical experts. PI has been part of the digital transformation from the very beginning, though, which makes it ideally equipped for this situation. This being the case, it is no wonder that the working groups chose to continue developing their concepts. Online meetings and processes have been part of everyday work at PI for many years, enabling effective and easy cooperation. To share this progress with Profinet users as well, PI is now implementing a number of different virtual methods of communication.

The focal point of this communication is the PI website, www.profibus.com/I40, where “Industry 4.0” is being rolled out again in its entirety.  PI is focusing on the highlights of its Industry 4.0 work here, beginning with Profinet over TSN, OPC UA Safety and vertical communication. Additional concepts will be addressed and added successively over time. PI won’t just be providing an overview of the technology and leaving it at that – technical details on solutions and use cases for applications will be added as well. This gives device manufacturers and users solid information for their own implementation of Industry 4.0-compliant integration.

In addition to this digital content, PI will also be visualizing the Industry 4.0 workshop to enable discussion with users and enter into dialog in these trying times – times which everyone at PI hopes will be over soon. Regardless, the working groups will continue to work hard on implementing Industry 4.0, in keeping with the motto: Go digital. Go Profinet .

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