High-pressure cooling technology can improve the safety of the car and milling process
A cutting head with a high pressure cooling lubrication system can accurately orient the coolant jet. By placing the nozzle near the cutting edge, the chips are well removed from the surface of the indexing blade. With a high pressure cooling system, the tool life can be increased by 50%.
Most equipment manufacturers can use high pressure cooling lubricants on their CNC machines. The popularity of such equipment has led to new evaluations of the use of coolants. Despite the advent of advanced equipment, many companies still use traditional cooling methods. High pressure cooling systems have decisive advantages in terms of production efficiency, workpiece quality and service life. In particular, combined with the corresponding tooling scheme, high pressure cooling (HPC) can be used to maximize the potential for machining difficult-to-cut materials.
The coolant must enter the contact area between the blade and the chip
In a conventional cooling process, the coolant jet is only substantially aligned with the processing area or completely overflows. In fact, in terms of effective use of the coolant, more can be done: the coolant must accurately align the contact area between the blade and the chip under high pressure, and achieve a sufficient amount of liquid. Only in this way, the coolant can exert its good advantages and improve the cutting process. Thermal conductivity, chip formation and discharge, blade nodulation, tool wear and surface quality degradation – all of which affect productivity, equipment life, chip control and workpiece quality. These are also key factors in improving the cutting process and increasing the competitiveness of the processing enterprise.
The high pressure coolant system accurately orients the jet between the blade and the chip
High pressure cooling technology works well when processing stainless steel and low carbon steel materials. Just using HPC technology on difficult-to-cut materials such as titanium and high-temperature superalloys can clearly see its positive effects. With the further development of innovative machine tools and tools, the utility of high pressure cooling technology will become more and more extensive.
In the 1980s and 1990s, Sandvik Coromant developed the first high-pressure cooling system Jetbreak. The coolant-oriented jet scheme with high pressure of 10~100MPa is premised on the basic research of the company. Through high pressure and accurate orientation, the coolant forms a partition between the cutting edge of the indexing blade and the chip, which can shorten the contact. Time to keep the chip area stable. In addition, Jetbreak can also influence the shape of the chips, better control of the chips and early chip breaking.
Initially, Jetbreak was only used in a small range, such as in the case of difficult-to-cut materials or flow chip formation. In the process, Sandvik has continuously improved its understanding of the effectiveness of coolant and pressure distribution, and constantly experienced the different effects of different nozzle sizes. Adjustments to such factors provide flexibility in controlling the shape of the chips, the length of the chips, and the direction in which the chips are discharged. Monolithic Jetbreak equipment can be used in processing applications such as energy, aerospace and ball bearings. But to this day, Jetbreak still needs special tools for assembling vertical lathes.
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