Automatically-controlled internal cooling system for cutting tool for numerically-controlled machine tool

Abstract

The invention discloses an automatically-controlled internal cooling system for a cutting tool for a numerically-controlled machine tool. The automatically-controlled internal cooling system comprises a controller, a coolant storage tank, a filter, a rotary joint and a machine tool cutting tool main shaft, wherein the coolant storage tank is internally provided with a liquid level sensor, a temperature sensor and an infusion pump; a liquid outlet pipeline and a liquid inlet pipeline are arranged outside the coolant storage tank; an electromagnetic proportional overflow valve and a pressure gauge are arranged on the liquid outlet pipeline; the filter is connected with the liquid outlet pipeline; a filter liquid outlet pipeline is arranged outside the filter; the rotary joint comprises a fixed end and a rotary end, wherein the fixed end is connected with the filter liquid outlet pipeline; a liquid conveying passage is arranged on the central axis of the machine tool cutting tool main shaft; one end of the machine tool cutting tool main shaft is connected with the rotary end of the rotary joint, and the other end of the machine tool cutting tool main shaft is connected with the machine tool cutting tool; a liquid outlet of the infusion pump is connected with the liquid outlet pipeline; a feedback electric signal generated by the liquid level sensor, the temperature sensor and the electromagnetic proportional overflow valve is accessed into the controller; the machine tool cutting tool main shaft is internally provided with an infusion through hole.

Description

technical field [0001] The invention relates to a cooling system for machine tools. More specifically, the present invention relates to an automatically controllable internal cooling system for CNC machine tools. Background technique [0002] Machine tool processing uses the relative movement between the tool and the workpiece to cause elastic and plastic deformation of the workpiece to achieve the purpose of metal processing. During the processing, due to the friction between the tool and the workpiece, a large amount of heat will be generated in the processing area. If the heat is not dissipated in time, the tool and the workpiece will be damaged, which will not only reduce the service life of the tool, but also affect the machining accuracy and surface of the workpiece. Therefore, the cooling effect of the tool cooling system of the machine tool has decisive significance for the machining quality, machining efficiency and tool life of the workpiece. [0003] During the ...

AI Technical Summary

Problems solved by technology

The disadvantage of this cooling technology is that the flow rate is fixed and cannot be changed, and the flow rate cannot be adjusted according to the speed of the tool and the amount of heat generated. Waste of coolant and energy. In addition, the waste coolant after workpiece processing also pollutes the environment very seriously.

[0004] Moreover, the tool cooling of CNC machine tools is generally achieved by spraying coolant on the outer surface of the tool to achieve cooling purposes. This cooling method is simple and convenient, but it has limitations; first, the cooling method of spraying coolant on the outer surface of the workpiece For some internal profiles, such as deep holes, deep grooves, etc., the coolant cannot be sprayed to the inside of the workpiece to achieve cooling effect; secondly, the cooling method of spraying coolant on the outer surface can only cool the outside of the tool, while for The effect of heating inside the tool is not obvious. Due to thermal expansion and contraction, the outer surface of the tool shrinks due to cooling, but the inside expands due to heat, and the internal and external forces of the tool are more likely to reduce the service life of the tool.

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