Microfinish attachments for turning, grinding and milling machines:

Value-for-money surface superfinishing

Wuppertal, (PresseBox) - In virtually all technical fields, the requirements placed on the quality of individual components are increasing. As a result of this, surface-improving and geometry-improving superfinishing techniques are becoming more important. Today, even smaller suppliers must be capable of working to the finest tolerances in dimensional accuracy. The German machine manufacturer Thielenhaus Microfinish presents a range of attachments for base machines for these applications and for small batch sizes. With these solutions, the advantages of the Microfinish technique can also be enjoyed using conventional turning, grinding and milling machines, meaning that the surface, roughness, waviness and contact ratio of the components being worked on can be improved in a reliable manner.

All of the attachments consist principally of an electric drive unit for high short-stroke movements and the oscillating tape or stone tool. The workpieces are held in the base machines between centres or, if no centering bore is present, tensioned from one side with a chuck or a collet. For the machining, they are set in rotation, with the oscillating stone or tape tool being pressed onto the workpiece pneumatically or using spring tension. The removal, which is performed in a sine-wave form due to the oscillation, removes the ‘soft layer’ generated during the hard turning or grinding process, drastically improving the roughness and contact ratio. Using this process, surface roughnesses of Ra 0.01 µm with rolls and Ra 0.3 µm with bearing positions can be achieved. At the same time, the surface can be given a structure with defined, criss-crossing grooves to improve its tribological properties.

Even though they’re small and good value for money, the devices are nevertheless high-performance units geared towards three-shift operation. They are principally used for geometrical improvements in roundness, evenness and cylindrical forms. Surfaces can also be smoothed to a mirror finish and definable levels of roughness can be produced. The residual compressive stress can also be raised in order to make the surface more wear-resistant. As well as chamfering edges and smoothing joints, the attachments can be used to achieve visual, cosmetic surface textures.

Microfinish attachments are particularly suited to the small batch sizes typically found in the production of hydraulics rods, components, sealing seats and shaft sleeves. However, larger individual workpieces such as calender rolls, cold rolls, Sendzimir rolls and printing rolls can be worked to a mirror finish. Foil manufacturers, for example, require mirror-finish surfaces; the printing industry needs precisely defined printing rolls in order to guarantee precise colour distribution, and hydraulics/pneumatics manufacturers need finely structured surfaces with a large contact ratio and twist-free sealing surfaces. Our competitively priced attachments are ideal for use wherever precisely defined and structured surfaces are required for small batch sizes.

Since the attachments can be used with many different base machines and special equipment, the workpieces are not dimensionally limited. Their form can be that of a flat surface, start-up shelves, external or internal rotationally symmetrical surfaces, but it can also be that of excenters, cams or cam discs. Further uses also include those involving spherical surfaces such as radii and undercuts.

These attachments represent a cost-efficient opportunity to receive an entire application from the market-leading specialists in ultraprecision machining that gets you the desired results without long trial periods.

More information can be found at: Thielenhaus Technologies GmbH, Postfach 201855, 42218 Wuppertal, Germany, Telephone + 49(0)2 02 481-0, Fax + 49(0)2 02 45 04 45, or at www.thielenhaus.com

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Thielenhaus Technologies GmbH

Thielenhaus Microfinish

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.

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