The efficiency class of a pump plays an enormously important role when it comes to configuring a cooling lubricant or high-pressure system for optimum performance. Basically, it indicates how high the motor drive power must be in order to achieve a certain pressure at a certain delivery rate. It is always important to consider the performance curve of a pump in relation to its motor. There are big differences here. Performance-optimised pumps generally have a stable pressure-performance curve. Less performance-optimised pumps, on the other hand, very often have a drop in the performance curve. This can lead to problems with process stability during performance generation.

The vane pump is often cited as a high-pressure pump. This pump is a technically very valuable and also very efficient pump, but it is equipped with a very delicate inner workings which, according to our experience, tends to wear quickly depending on the medium and filtration. For this reason, we do not use this pump technology in the manufacture of cooling lubricant systems for machine tools.

Below you will find some detailed information on the four pump technologies we use today. We offer you the following high-pressure pump technologies as core competences for high-pressure generation on our high-pressure systems and pressure boosting systems and high-pressure conveyor combination systems:

Piston pump (axial or radial)

• Design as a fixed displacement pump without mechanical controller but with frequency converter (eco+ frequency converter)
• Version as a mechanical control pump with maximum energy efficiency (eco+ control pump)

High-pressure systems in machining with machine tools with pressures well above 50 bar are used today primarily for general support of the machining process. There are many positive aspects to this, which we have described in more detail elsewhere. But regardless of the application and the cooling lubricant medium, there is almost always an enormous improvement in the service life of the tools used and in the surface quality of the workpieces. These advantages can basically be observed in every type of machining, as well as on a wide variety of machine tool types, be it a conventional lathe, a multi-spindle machine tool or even a machining centre. As a manufacturer, we have a wide range of products in the form of a modular system for all users with the exception of grinding machines, which we do not currently serve.

However, there is one machine tool type in particular on which we are focussing: automatic lathes. Here we are the market leader in Europe with our wide range of solutions for the machine types available on the market.

What is a sliding headstock automatic lathe?

A sliding headstock automatic lathe is a special machine tool that is used in manufacturing technology to produce precise and complex turned parts from various materials. These machines are particularly suitable for the series production of long, cylindrical components, as they offer a high level of automation and efficiency. Automatic lathes can perform several machining steps in a single pass, which shortens production time and increases accuracy. The majority of machining is carried out using cutting oils for tool cooling. The machining process is characterised in particular by the machining of high-alloy materials, in which very small and deep holes often have to be drilled. For this reason, the sliding headstock automatic lathe is very often equipped with so-called high-pressure systems for internally cooled tools ex works or retrofitted in the field. They are frequently found in the automotive industry, in mechanical engineering and in other areas of industrial production. In particular in medical technology, the watchmaking industry, engine and gear parts production, as well as in parts of the furniture industry and many more.

What makes our combiloop, combistream and chipstream systems so attractive for the world of sliding headstock automatic lathes?

Operators of production facilities with sliding headstock automatic lathes are generally designed for high output. They need fast cycle times, very high pressures, high precision with optimum space utilisation and maximum energy efficiency. And this is where we come in: regardless of whether the high-pressure system is placed under the bar feeder or parallel to it, we have the modular solution for pressures of up to 300 bar and flow rates of up to 60 l/min. And that as standard. But we top this with a unique energy efficiency concept, which is characterised above all by applications in cutting oil and shows its full class with high-alloy materials as well as with filigree and deep bores. By using our eco+ mechanically self-regulating piston pump, we achieve excellent energy savings for our partners and customers compared to other technologies. We would like to demonstrate this economically using the following example: