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As auxiliary materials, cooling lubricants have become an integral part of production. In addition to cooling the workpieces and tools, their tasks also include the removal of material. This results in an abrasive mixture.
In order to ensure effective, sustainable and high-quality production, the material removal from the cooling lubricant must be filtered so that it can be fed back into the machining process. The filtration of these fluids poses a problem in high-precision production that the filter specialist Lehmann-UMT is focusing its research and development efforts on solving.
The company found help from the filter specialists at Lehmann-UMT
Challenging solutions in ultra-fine filtration for high-performance production processes are a core business of the Pöhl-based company. After thorough analysis, Lehmann-UMT finally developed a solution in its in-house laboratory and technical center through numerous test applications and filtration trials with different filtration levels and combinations of filter technologies to achieve the desired ultrafine filtration results in a valid and sustainable manner.
The result was an ultra-fine filter system that achieves the required filter fineness of 2-3 μm in full-flow filtration without the use of filter aids. The 3-stage system feeds 100 to 400 liters of grinding oil per minute, filters it and feeds it back to the CNC machine in a closed circuit.
As Mr. Pisch, process engineer of the specialist department at Berliner Glas, explains, the addition of the filter system to the CNC machines is a kind of "growing together" and a big step towards higher production output. The ultra-fine filter system from Lehmann-UMT enables continuous operation of the CNC machines and therefore a higher output for the company without any loss of quality. This is particularly true with regard to the repeatability and accuracy of the production results. Longer machine service lives are an additional benefit.
