Workbench static pressure system for cooling static pressure oil

Abstract

The invention discloses a workbench static pressure system for cooling static pressure oil. An independent static pressure oil cavity is connected with a backflow oil cavity, the backflow oil cavity is connected with a hydraulic pump, the hydraulic pump is connected with a filter, the filter is connected with a heat exchanger, the heat exchanger is connected with a distributor, the distributor is connected with a pressure connector, the distributor is connected with a static pressure assembly, the distributor is connected with an overflow valve, and an overflow valve is connected with the backflow oil cavity. The static pressure assembly is connected with the independent static pressure oil cavity; a pressure relay is connected with the static pressure assembly and the hydraulic pump; the heat exchanger is connected with the cooling loop. The invention serves as a static pressure oil tank body, an independent static pressure oil tank does not need to be additionally arranged, cost is saved, installation and maintenance are convenient, the heat exchanger is additionally arranged in a static pressure loop to cool static pressure oil, the temperature of the static pressure oil is kept stable, and therefore the precision of the workbench is guaranteed.

Description

technical field [0001] The invention relates to the relevant field of static pressure systems of machine tools, in particular to a workbench static pressure system for cooling static pressure oil. Background technique [0002] With the continuous development of ships, military industry, electric power and heavy industry, the market demand for CNC machine tools with large carrying capacity, high processing precision and good running stability is also increasing; Indicators also put forward higher requirements. [0003] At present, the rotary table of CNC machine tools at home and abroad mainly adopts the structure of static pressure support. The main principle of static pressure support is to form a layer of bearing oil film between the dynamic and static guide rail surfaces to greatly reduce the friction when the table rotates. resistance. The static pressure support has the characteristics of high load capacity, small friction force and good vibration resistance. However...

AI Technical Summary

Problems solved by technology

However, changes in the weight of the loaded workpiece, changes in the ambient temperature, and increases in the temperature of the hydrostatic oil itself will affect the accuracy of the workbench.

A constant temperature workshop can be used to increase the temperature of the hydrostatic oil itself, but this method is costly and cannot be popularized

At present, the commonly used method is to add an independent hydrostatic oil tank in the non-processing area of ​​the machine tool, cool the hydrostatic oil in the independent oil tank, and then transfer it to the static pressure circuit of the workbench; this method can solve the temperature rise problem to a certain extent, but Because the pipeline is too long, it is easy to cause the oil return to be delayed, and because the pressure of the static pressure oil is high, it is easy to cause damage to the pipeline, pollute the environment, and affect production.

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