Grinding Aid This Is How Precise Temperature Control Is Achieved During Coolant Filtration

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FAULHABER Drive Systems

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Only when the coolants for machining are always in top condition can metals be machined precisely. This is made possible by Vomat's filtration technology ...

For those looking to be as economical as possible in the machining of metals, filtering the so-called coolant lubricant is essential. The reprocessed coolant is continuously returned to the milling, turning, or grinding machine. However, it is important that the temperature of the coolant is appropriate, as emphasized by the filtration specialist Vomat. Otherwise, there may be a risk of losing processing quality. Tool manufacturers thus face the challenge of combining high investments in grinding technology with increasing sustainability demands and economic pressure. The filtration expertise of Vomat also plays a role in addressing this challenge.

This Is What Modern Filtration Systems Can Achieve

From standalone units to large central systems, Vomat's customized fine filtration systems fully separate dirt and clean oil 100 percent in full flow. This is achieved with purity according to NAS 7 (3 to 5 micrometers). Needs-based full-flow filtration using backwash procedure with automatic cycle depending on the type and degree of contamination, regulated filter pumps (positive energy balance), as well as appropriate cooling and disposal technology stand for economic and ecological success. One might wonder about grinding oil filtration and KSS temperature because today's grinding processes change with temperature fluctuations, affecting processing precision. However, with Vomat technology, the coolant temperature can be regulated precisely to ± 0.2 °C, for example, for machine types FA 120 to FA 240. There, cooling is optionally integrated as an insert unit into the filtration system, allowing for easy on-site disassembly and assembly without service personnel. The condenser is foldably mounted in the filter hood. Optionally, the axis drives, spindles, and motors can also be cooled.

Cooling Sustainably with a Chiller

In addition, there are add-on devices or mounted units on the building's exterior wall with condensers—for example, for external cooling of machine models FA 120 to 960. The cooling capacity ranges from 9 to 60 kilowatts when ambient temperatures range from 15 to 35 °C. Precise room temperature control is optionally possible. An example of a chilled water-operated system with an external water circuit is the KWS 250 chiller with an integrated coolant recirculating pump and compact Eaton control. The cooling capacity is approximately 250 kilowatts in solo operation. The control accuracy is ± one °C. The modular chiller, which does not require a buffer tank, is also suitable for outdoor installation, such as in industrial areas. Its dimensions are 2,200 × 1,900 × 2,700 millimeters. The KWS 250 is particularly noted for its energy efficiency. Compared to other systems, its energy requirement is ideally up to 62 percent lower, as Vomat emphasizes in conclusion.