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Impermeable stacking enables integrated cooling for electric motors

The efficiency and performance of motors are crucial in electromobility. This includes, in particular, the factors of energy efficiency, stack stability, and their impermeability to cooling fluid. The glulock MD (Multiple Dots) bonding process promises tight and stable electric motors, even in the high-temperature range.

Increased efficiency in electric motors are not only goals set by the automotive industry, but are also anchored in the regulation of efficiency classes for industrial motors. This required increase in efficiency is achieved by modern grades of electrical sheet. At the same time, the thickness of the sheet is reduced, as this allows electrical efficiency to be increased. In the area of joining methods, market analyses show a trend towards bonding the laminates. This can increase performance and reduce losses in the motor. Feintool offers glulock MD, a unique joining technology with decisive, commercial and technical advantages for customers.

High efficiency and stable at high temperatures

Compared to conventional package types, glulock® proves to be cost-effective, precise in design and with significant improvements in stack tolerances for parallelism, shape accuracy, runout and length tolerance. In addition, the output power is increased or, conversely, the motor size is reduced. Noise generation and eddy current losses are also reduced. Even the stacking of thin sheets (0.1 mm) can be realized with glulock®. glulock HT (High temperature) is a continuation of the series-proven gluing method. It improves strength and media resistance and enables increased temperature resistance up to 180° C. For example, glulock HT can be used in ATF oil within temperature class H.

Sealing as a new challenge

Further developments in electric motors show that, in addition to the growing mechanical and thermal requirements, their cooling also has potential for optimization. The trend is for motors not to be cooled externally, but to have cooling integrated into the rotors and stators. This requires impermeable stacking, sealing and surface bonding. glulock MD is the further development of the glulock® technology and offers the solution for the new market requirements. With glulock MD, it is possible to place several glue dots on the sheet in such a way that an almost full-surface bonding is ensured. Tests have already confirmed the required tightness. The bonding on the yoke and tooth ensures stability.

The patented bonding processes offer the ideal solution for electric motors with high quality requirements in terms of stability, electrical efficiency, media and temperature resistance, and leak tightness. With these prerequisites, it is possible to achieve decisive advantages in cooling options as well as to significantly advance the development of electromobility. Markus Lock, Head of Engineering, is convinced: “With the existing technology portfolio, its consistent further development, and our proximity to customers and the market, I am firmly convinced that we have already found the right answers to the requirements of the future.”

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An innovative manufacturing method for high-precision bipolar plates

The rapidly growing demand for electromobility requires the economical production of large quantities of components – for example for fuel cells.

In a current research project, the Feintool Group, the University of Applied Sciences Northwestern Switzerland and the Hightech Zentrum Aargau are developing an economical forming process for the high-volume production of metallic bipolar plates for fuel cells.

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High-performance fuel cells through FEINforming: the key to future mobility

Hydrogen is poised to play a critical role in global industrial decarbonization. As a result, technological advances in recent years have been able to significantly reduce the costs of many hydrogen applications.

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Surface Tempering in Ohrdruf

Fineblanked and formed parts are becoming lighter and smaller. At the same time, the demands on their strength are increasing. Likewise, the demand for procedures that improve their performance have increased over the past few years accordingly. For instance, in order to temper surfaces further, Feintool offers heat treatment processes using its own equipment – for example at our forming plant in Ohrdruf, Germany. Here, our tempering expertise is built up and expanded. Now, we no longer only manufacture formed parts, but these can also be processed directly on-site and delivered to the customer ready for assembly.

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Feintool as a development partner: The team route to success

In 2014 Feintool was approached by US automotive manufacturer Dayco. The order? Production of a pulley with damper. For a good three years, developers from both companies worked closely together and tinkered with the optimal manufacturing process. It paid off: In 2019 380,000 parts will come off the conveyor belt, with that figure rising to 450,000 in 2020.

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Industrial IOTA Lab Aachen: Where fineblanking meets blockchain

Industrial IOTA Lab Aachen

Bitcoin is probably the best known implementation of a blockchain technology. However, blockchain is about much more than digital currency: It’s about guaranteeing confidence in data, ensuring the immutability of data, and resource-saving, localized storage systems and networks. All three properties will allow data to be handled like commercial goods in the future, perhaps even independently between the specific processing machines.  Continue reading Industrial IOTA Lab Aachen: Where fineblanking meets blockchain

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Electro sheet stamping

Stator packages made from electro sheet metal for electric motors

The technology of shear-action cutting or stamping is versatile and has a very broad range of potential uses. Stamping electro sheet is one application of this manufacturing process, but at the same time the various processes involved in production and the requirements of tools should not be underestimated.

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The turbo for forming

Brilliant results: The plate carriers are readied for fitting and transferred down a parts chute for dispatch.

Downsizing is one of the trends in car making. An increasing amount of technology capable of enhanced performance is packed into the smallest space. To ensure this functions correctly in the engine or gear box, forming specialists from Feintool System Parts are in high demand. They too are consistently pushing technological boundaries and the limited space available for forming tools. Continue reading The turbo for forming

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Modern developments in fineblanking oils


The advancement of fineblanking technology with more efficient presses and complex tools also gives rise to the need for more effective fineblanking oils. On top of this, some of the materials being processed are high-strength. The development of new fineblanking oils can only succeed when all parameters and the tribology of the overall process are taken into consideration. We highlight some fundamental aspects.

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An ignored success factor: the interaction between tool and press

Feintool employe with press and tool

Alongside many other factors, the optimum interaction between tool and press is a crucial and often underestimated factor when it comes to stably functioning production. Unfortunately, this factor generally goes unheeded due to the organizational separation of tool and press maintenance. Responsibility for errors and faults is unclear, and the bigger picture over all interfaces is not considered.

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