A new line of tape finishing machines for the microfinishing of crankshafts with the narrowest bearing clearances has now been developed by Thielenhaus Microfinish. With the CrankStar HP (High Productivity) and the CrankStar HF (High Flexibility), the market leader in the field of high-precision machine tools for surface microfinishing meets the requirements of many engine manufacturers in terms of a flexible machine solution which is suitable for smaller crankshafts. Particularly narrow finishing units with an extremely large opening angle (80°) allow, for the first time, the economic and process-safe machining of crankshafts with a mere 33 mm depth gauge, which is required by the trend towards more compact engines with higher efficiency.

In addition, on the innovative microfinishing machine, all crankshafts made of cast iron or steel with a tip width of 500 mm (HP) to 800 mm (HF) and a maximum revolution diameter of 210 mm as well as a stroke of up to 100 mm can be finished in one step or more. Crankshafts for engines with three to six cylinders can even be processed without changing the set-up. In addition to the usual surfaces, such as main, lifting and fitting bearings, the front pins can also be finished and the flange bores can be deburred as part of the single-step or multi-step process.

A special highlight of the CrankStar HP is the optional decoupled loading system, which allows for a main time-neutral loading/unloading via an external portal. This allows reductions of the cycle time of up to 17 seconds. This saved time can be used as extended machining time, which can even enable you to dispense with an entire station.

Apart from its extra-slim and flexible tape finishing units, the CrankStar gained a lot of attention due to its innovative and ergonomically designed tape management system. A particularly ample belt capacity, various belt monitoring options and the best accessibility to the workspace guarantee the shortest downtimes. Tape end, tape feed and tape tear monitoring reports imminent and unforeseen interruptions in the tape feed and ensure consistently good results. All tape rolls can be replaced from the front of the machine, meaning complete operation can take place ergonomically from just one side. The innovative tape cutting system in the CrankStar HF also works reliably and without problems, even with different tape thicknesses. Depending on the requirements, the hard and/or soft tape pressing shoes can be easily exchanged without any tools by means of a quick-change system.

The CrankStar HP is designed for high output with the shortest cycle times and, with a width of 2,000 mm per station, has an extremely compact design. The modular design allows all the processing stages to be displayed. The CrankStar HF is designed for cycle processing and can therefore be integrated into flexible production lines.

The loading can take place via portal, robot or by hand into the machine. The standard new tape finishing machine is delivered with a particularly energy-efficient periphery.

Über die Thielenhaus Technologies GmbH

Thielenhaus Microfinish, a division of the German Thielenhaus Technologies GmbH, has been building high-precision, high-productivity machine tools for over 100 years. In the last 70 years, Thielenhaus Microfinish has become the leading manufacturer of extreme-precision machine tools for Microfinish/Superfinish and double-disc grinding applications.

Microfinishing, also known as superfinishing or short-stroke honing, is the ideal machining process for achieving extreme precision surfaces and component geometries, and removing amorphous surface layers in the magnitude of 2 µm. Honing stones, cup wheels and microfinishing tape or film can be used to generate surface roughness or geometrical accuracy within a previously defined window that often spans a few tenths of a micron. Indicated below are a number of parameters which can be optimized using Microfinish:

With facilities in Europe, America and Asia and a worldwide service network, Thielenhaus has adapted itself to the market conditions and to the customer needs all over the world.

Commitment to quality: Thielenhaus machines are employed by leading manufacturers across the world for a good reason – their high reliability, productivity and production quality. Thielenhaus continuously pushes the limits of precision machining, enabling its customers to achieve workpiece qualities that were previously impossible.

All solutions from a single source: Extreme precision is the specialty of Thielenhaus, and over the years the manufacturer has built the world’s largest portfolio of Microfinish solutions, ranging from industrial equipment for large and small manufacturers to just-in-time tool delivery and other services. When it comes to Microfinish Thielenhaus is the one-stop shop.

The flexibility of Thielenhaus is its customer’s advantage: The manufacturer adapts the machine solutions to the customer’s component, loading/unloading preferences, cycle time requirements and other specific needs. The modular design of the machine platforms accommodates even tricky components.

New challenges and innovation are the passion of Thielenhaus: They are proud of their 430+ patents in surface finishing technology as well as of numerous market-leading platforms and pioneering innovations. Thielenhaus constantly seeks to improve the machining concepts, always keeping in mind the challenges of tomorrow.

Customer support all over the world: With customer service locations in six countries and service agreements with a network of agents and distributors, Thielenhaus is able to provide quick service on short notice practically anywhere in the world. The customers also benefit from a 24/7 hotline and Online Direct Service.

Thielenhaus is known as a highly experienced problem solver: Anyone can be a problem solver, but with more than 70 years of developing Microfinish solutions, the Thielenhaus staff have probably seen and solved more Microfinish problems than anyone else in the industry. When it comes to splitting microns, the Thielenhaus in-depth knowledge of the microfinishing process is unsurpassed.

Firmenkontakt und Herausgeber der Meldung:

Thielenhaus Technologies GmbH
Schwesterstr. 50
42285 Wuppertal
Telefon: +49 (202) 481-0
Telefax: +49 (202) 4504-45

Wolfgang D. Riedel
E-Mail: riedel@technopress.de
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