The most common accidents involving the use of machine tools include spindle crashes. Common causes include programming errors, incorrectly defined tools, disregarded interference contours, or unintentional high-speed operation. The forces involved are so enormous that components of the motor spindle, ceramic spindle bearings, shafts, encoders, clamping system and the entire machine geometry can be affected or even completely destroyed.
A case study from RWTH Aachen shows that repair costs after a crash in the amount of five-digit euro amounts are not uncommon. Collision avoidance systems for machine tools minimize damage and reduce downtime and repair costs in the event of a collision. Nevertheless, only very few machine tools have a spindle collision protection at all. This is usually based on compression elements that act like a car bumper and are completely destroyed in the event of a crash. Although the spindle components remain intact, downtime still occurs.
The motor spindle protection system MS³ from Jakob Antriebstechnik detects collisions by means of several sensors and reports them electronically to the machine control. This can bring the feed axes of the machine tool to a halt with measures such as braking and reversing the drives. But beyond that, the motor spindle protection system can immediately interrupt the power flow at the interface between the spindle box and the motor spindle by means of 3D deflection in the event of a collision-induced overload, even before the electronic emergency stop, mechanically and energy-autonomously. This effective combination of mechanical protection system and active electronic sensor monitoring makes the system superior to purely electronic collision avoidance systems and effectively protects the shock-sensitive components of the motor spindle from the high force peaks of the collision. The resulting kinetic energy of the crash intercepts a built-in shock absorber. The difference is made by a double flange system with built-in permanent magnets.
They can guarantee the required high holding forces and rigidity. During the disengaging process, compression springs guide the motor spindle and then return it to its original position. The downtime is limited to the exchange of tools, additional external service is no longer needed. The system is energy self-sufficient, maintenance-free and adaptable to all common motor spindle geometries.
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Innovative functions simplify safety approval
New hardware and new functions to the TIA Portal
Sinamics Startdrive commissioning software is the perfect tool for integrating drive hardware into the TIA Portal engineering framework. With the latest version Sinamics Startdrive V16, Siemens is expanding the hardware portfolio available on the automation platform. Following on from the integration of the Sinamics S120 multi-axis system, the single-axis version of this high-end servo drive system can now also be engineered in the TIA Portal. The drive control of the recently introduced Simatic Drive Controller is now also integrated in the commissioning tool. Drive-CliQ hubs, which increase the number of interfaces in the Sinamics S120 multi-axis group, as well as other add-on components, are now integrated in the TIA Portal, perfectly completing this hardware update.
Sinamics Startdrive V16 also features innovative functions. With the introduction of expertise protection for Sinamics S120, the parameterization of drives can be protected from unauthorized changes and read attempts. When it comes to safety technology, a wide range of safety functions is available thanks to Sinamics Safety Integrated. With Sinamics Startdrive, these functions can be parameterized and validated in a simple, user-friendly process. The safety approval test integrated in Startdrive leads users through the approval process step by step and then creates a standard-compliant test record.
The Sinamics Startdrive commissioning tool is a key component for the automation of machines. Convenient interaction between the drive and controller makes it easy to complete the project engineering and commissioning of Motion Control applications with Simatic controllers and Sinamics drives. Sinamics Startdrive V16 takes drives in automation to the next level in terms of seamless operation, flexibility and user-friendliness.
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Chamber Belt Machine B 625
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Twin screw pump
Cooperation between Gea and Itt Bornemann
The pump experts from Gea and Itt Bornemann are now working together to manufacture and market a twin screw pump for the food, beverage and pharmaceutical industries. While Gea has so far concentrated primarily on hygienic centrifugal pumps, the cooperation now means that a joint model of a positive displacement pump is ready for introduction: Gea Hilge Novatwin. The Gea Hilge Novatwin is a flexible twin screw pump based on the proven Bornemann design that meets the highest hygienic requirements for gentle product handling and clean-in-place (CIP) with just one pump. The new Gea Hilge Novatwin will be available in 6 sizes and will be part of the Gea Varipump line, which stands for pumps with a high degree of flexibility for optimum adaptation to individual customer requirements.
Consistent expansion of hygienic pump portfolio
The addition of this future-oriented pump type to the portfolio in addition to the established rotary lobe pump Gea Hilge Novalobe will significantly strengthen Gea’s position in the field of positive displacement pumps. Gea will thus be in an even better position to cover the various customer requirements with the ideal pump solution from its own broad product portfolio.
Pump and clean with one pump
Twin screw pumps are equipped with two screws, which intermesh without contact and together with the pump housing form a closed chamber. The screws rotate and thus move the medium along the screw axis from the suction to the discharge side.
Like positive displacement pumps in general, twin screw pumps stand for the gentle conveyance of chunky, shear-sensitive and abrasive media. They offer exceptionally high flexibility for pumping liquids of various viscosities.
“The special feature of the twin screw pump is its dual function, because twin screw pumps can not only pump the actual product but can also function as a CIP pump at the same time, as they can operate at very high speeds. This saves the use of an additional CIP pump compared to alternative solutions,” explains Product Manager Ulla Främke from Gea.
With Gea and Bornemann two strong partners work together
“This cooperation with Bornemann is a real win-win situation for both partners,” says Bastian Tolle, head of product management at the Gea Flow Components business unit. “The twin screw pumps we see in the market today are mostly derived from Bornemann’s original development. The expertise is impressive, we can learn a lot from such a partner and from the experience gained over decades in the application of this special positive displacement pump”.
“We will benefit from Gea’s strong distribution network”, adds Bornemann’s Managing Director Markus
Schwarte. “Gea has a broad customer base, a large network and an excellent reputation among decision-makers, particularly in the food sector and in local markets such as the USA. We want to benefit from the synergy between the leading technology and the first-class global network in the food industry”.