A cooling parameter control method for metal cutting cooling gas jet field

Abstract

The invention discloses a refrigeration parameter control method for metal cutting cooling gas jet field, which is applied to a gas source, a gate valve, a booster pump, a high-pressure container, a heat exchanger, a high-pressure electromagnetic valve, a tapered nozzle, a controller and In the control system composed of temperature sensor, pressure sensor and delivery pipeline, inlet pipeline and outlet pipeline, the temperature and pressure of the gas in the high-pressure container are changed by the controller to control the heat exchanger and the booster pump to change the inlet of the convergent nozzle. The temperature and pressure of the gas at the front end; under the influence of factors such as the environment and the loss of the gas outlet pipeline, combined with the fluid thermodynamic model of the established system, the actual gas temperature at the outlet of the tapering nozzle and the jet field outflow of gas per second are calculated by the controller. The enthalpy is compared with the theoretical value and adjusted to achieve stable and accurate control of the gas temperature at the exit of the tapering nozzle and the enthalpy of the gas flowing out of the jet field per second.

Description

technical field [0001] The invention relates to the field of gas-cooled metal cutting, in particular to a method for regulating and controlling refrigeration parameters of a cooling gas jet flow field in metal cutting. Background technique [0002] Gas cooling metal cutting technology is a green cutting technology that uses gas for cutting. This technology is that the high-pressure gas expands at the outlet of the tapered nozzle, and uses the Joule-Thomson effect to generate a low-temperature jet field, thereby taking away the cutting heat generated by cutting, and achieving the effect of heat absorption and cooling. The enthalpy, temperature and other parameters of the jet field affect the cooling capacity during cutting, which is difficult to measure directly, and the lack of parameterized control methods makes it difficult to parameterize the cooling capacity of gas during gas-cooled metal cutting. Contents of the invention [0003] The purpose of the present invention...

AI Technical Summary

Problems solved by technology

The enthalpy, temperature and other parameters of the jet field affect the cooling capacity during cutting, which is difficult to measure directly, and the lack of parameterized control methods makes it difficult to parameterize the cooling capacity of the gas during gas-cooled metal cutting.

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