SU889408A1 - Cutting fluid feeding system - Google Patents

Description

(54) LUBRICATING COOLING SYSTEM

I

The invention relates to mechanical engineering and can be used for cold processing of materials by cutting with a blade, abrasive, diamond, elbor, and other cutting tools.

During the operation of metal cutting machines, the coolant is gradually contaminated with metal shavings and dust, while grinding with particles of abrasive and bonding, abrasive and chip joints. Cleaning the coolant from mechanical impurities leads to a significant improvement in the quality of the machined surface, an increase in the productivity of the cutting process and the durability of the cutting tool.

Known for using on most machine tools a coolant supply system, with a free-flowing stream (irrigation). In this system, coolant from the settling tank is pumped through a filter through a pump into the cutting zone, then the coolant is discharged back to the tank (settling tank). . In this system, the cleaning of coolant from solid particles of pollution is performed using a sump tank and a filter.

LIQUIDS

The disadvantage of gravity settling tanks is the low speed of the cleaning processes, which necessitates an increase in the capacity and dimensions of the settling tanks. Under the conditions of an individual coolant supply system, when the sump tank is relatively small, it is rather difficult to provide high quality cleaning. As for filters, modern filter systems work only in a continuous cycle, and the need to improve the quality of filtration leads to a dramatic complication and cost of these systems.

The aim of the invention is to increase the efficiency of the system.

This goal is achieved by the fact that during the machining of parts by cutting 5 during the contact of the cutting tool with the workpiece surface, the coolant passing through the pressure branch of the fluid supply system to the treatment zone is subjected to additional purification from mechanical impurities.

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Additional cleaning coolant from mechanical impurities. performed, for example, by holding particles of contaminants

at the time of contact of the cutting tool with the workpiece surface by an external force field (electric, magnetic, electromagnetic). After the cutting process is completed, the field is removed and the coolant flow carries the solids to the tank trap.

The drawing shows the proposed system coolant.

The system has a tank (sump tank) 1, filter 2, suction pipe 3, pump 4, discharge pipe 5, valve 6, additional cleaner 7 and nozzle 8. From tank sump 1 through filter 2 and pipe 3 Coolant flows into pump 4 The pressure pipe 5 through the valve 6 coolant along the pressure branch enters an additional cleaner 7. At the same time as the grinding wheel is supplied, the voltage on the workpiece electrode 7 is energized and the electric field holds particles of soil in the cleaner until it is finished and the grinding and removal process of the grinding wheel. After removing the voltage from the electrodes, the contaminant particles are carried away by the flow of coolant through the nozzle 9 and are removed back into the sump tank through the pipeline. Said cleaner ensures the retention of soil particles using a non-uniform electric field. Under the action of the field of particles, a dipole moment oriented along the line of intensity appears. The resulting dipoles due to dipole and dielectrophoresis rush to the region of the greatest intensity of the electric field.

The particles approach the element located in the center of the cleaner and are held by the field at its outer surface due to the forces of the dipole interaction. After removing the floor, all particles are carried away by the coolant flow.

The voltage on the electrodes and the consumed current si.ta depends on the conductivity of the coolant.

The use of the proposed coolant supply system in comparison with the known ones allows improving the quality of the treated

About the surface of the part, increase the productivity of the cutting process and the durability of the cutting tool and, consequently, the efficiency of the cutting process as a whole. In this case, the proposed system is much simpler and cheaper than the known ones.

Claims (1)

Invention Formula The cutting fluid supply system for cutting, including a filter tank, a pump and a coolant supply line, characterized in that, in order to increase the efficiency of the system, it is equipped with an additional batch cleaner located in the discharge branch of the pipeline in the immediate vicinity of cutting area.  Sources of information taken into account in the examination 1. L. Khudobin and E. G. Berdichevsky. Technique for the use of cooling lubricants in metalworking. M., “Machine building, 1977, p. 98, fig. 60