The hydromechanical spring-loaded cylinders of the ZSF series from Jakob Antriebstechnik offer robust and reliable clamping elements. These spring-loaded systems can be used wherever displaceable or movable machine parts must be temporarily clamped or locked. Other applications can be found in jig construction and for workpiece or tool clamping.
The spring-loaded systems interact mechanically-hydraulically. The clamping force is applied mechanically by a prestressed plate spring package. The hydraulics are only needed for the release stroke of the elements, whereby the tie rod or pressure pin is released. This system ensures a high level of operational safety, since the clamping force is always maintained at full height, regardless of oil pressure or leakage losses. In the operation the pressure or tension piston is alternately acted upon by the plate spring package or the hydraulic pressure. This means that the spring pack is compressed with increasing oil pressure, the spring force increases. At set pressure, the corresponding nominal clamping force is achieved as the reaction force of the plate spring package. To release the pressure or tension piston, a higher hydraulic pressure is required, which is proportional to the release stroke up to a maximum value. This means that the setting pressure is required only for the initial installation for exact force adjustment. In the actual operating cycle, the cylinders are driven either without pressure or with release pressure. For spring-loaded cylinders, a mandrel or tie rod is screwed into the threaded hole of the tensioning piston and secured (on request, in one piece or with special thread). Operation requires a hydraulic unit that should be equipped with a pressure gauge, a pressure relief valve, a switching solenoid valve and a pressure switching device.
The hydromechanical spring-loaded systems can score with many advantages. Due to the short operating times of the hydraulic unit, this system offers advantages in terms of economy. The acquisition costs are low, the reliability is increased, the application areas are diverse and the operation is very simple.
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Siemens and Pixeom
Acquisition of Edge technology
Siemens is planning the acquisition of Edge technology from the US company Pixeom. With this action, Siemens is strengthening its Industrial Edge portfolio by adding software components for Edge runtime and for device management. Siemens Industrial Edge provides an ecosystem, which enables the flexible provision and use of apps. This means for example that appropriate apps can analyze data locally at the machine and send relevant data to the higher-level Industrial Edge Management System for global analytics. With this acquisition, Siemens is driving forward the expansion of its Digital Enterprise portfolio and the integration of cutting-edge technologies for the digital transformation of industry.
With the resulting Industrial Edge ecosystem, industrial companies can use production data even more efficiently and react more flexibly to changes in conditions. Ralf-Michael Franke, CEO of Business Unit Factory Automation, explains: “Cutting edge technologies such as Edge Computing open up new scope for automation. With Siemens Industrial Edge, we are creating an open edge ecosystem which offers benefits for companies of any size.” Siemens is using Docker standard container technology: the provision of apps in the management system will therefore be just as simple as functional upgrades and updates of Edge devices in the factory from a central point.
Siemens intends to acquire this technology from Pixeom and use it in the Business Unit Factory Automation, which is part of Siemens Digital Industries. Pixeom has sites in San José, California and Udaipur, India and employs 81 people worldwide. Closing of the transaction is planned for the fourth quarter of 2019. Both companies have agreed not to comment on the financial details of the transaction.
Valve islands for highly available environments
The Air Line SP Type 8647 valve island by Bürkert Fluid Control Systems can be integrated in the distributed peripheral systems SImatic ET 200SP and ET 200SP HA by Siemens. The new integration stage further increases system availability and reliability, e.g. also in R1 redundant Profinet environments.
Machinery and systems must be designed in such a way that neither humans nor the environment or property are damaged by their functions. Typically, such requirements – especially in new systems – are resolved using a Profisafe controller, the PROFIsafe protocol and respective fail-safe IO modules.
Therefore, the fluidics expert Bürkert Fluid Control Systems and Siemens have been constantly pooling their know-how: For example, the Air LineSP Type 8647 valve island can now be integrated into the distributed peripheral systems Simatic ET 200SP and ET 200SP HA. The new integration stage further increases system availability and reliability. For the first time, valve islands in highly available and up to R1 redundant Profinet environments can be operated using the Profisafe protocol directly in a distributed peripheral system. Pneumatic segments or individual valves can then be switched off selectively via the corresponding safety relay.