Titanium alloy milling non-contact measurement tool temperature measurement method and device

Abstract

The invention discloses a method and device for measuring the temperature of a knife in a non-contact manner during milling of titanium alloy. The device comprises an infrared digimite and a contact type tool setting gauge, wherein the infrared digimite and the contact type tool setting gauge are separately arranged on an adjusting box; the adjusting box is arranged on a spindle box of a milling machine; the infrared digimite focuses an emitted light beam to a milling cutter through a miniature groove, and generated photoelectric signals are acquired and input to a computer through the infrared digimite, and are displayed and recorded in real time. The light beam emitted from the infrared digimite penetrates through a micro-groove which is formed in a workpiece in advance, and is focused in a to-be-measured region of the knife, thus, an instant cutting temperature of the knife is measured in a non-contact on-line manner at high precision in a titanium alloy milling process, the circumstance that measured temperature deviation is high due to heat dissipation of the knife is avoided effectively, and authenticity of an instant temperature during cutting of a measuring tool is ensuredto a maximum extent.

Description

Technical field: [0001] The invention relates to a temperature measurement of a titanium alloy milling tool, in particular to a non-contact method and device for measuring the temperature of a titanium alloy milling tool. Background technique: [0002] Titanium alloy has the characteristics of high strength, good corrosion resistance and high heat resistance, and has become an indispensable structural material in the modern aerospace industry. However, due to its small thermal conductivity, the temperature of the workpiece and the tool in the cutting area is high, and the high temperature of the tool will have a great impact on the processing and results, and even affect the life of the tool. Temperature matters. At present, there are two commonly used methods for measuring tool temperature during milling: contact measurement and non-contact measurement. [0003] Contact measurement methods mainly include natural thermocouple method, artificial thermocouple method, and sem...

AI Technical Summary

Problems solved by technology

The natural thermocouple method is simple and reliable. This method can only be used to measure the average temperature of the cutting part of the milling cutter, and cannot measure the temperature of a specific point.

The artificial thermocouple method can measure the temperature distribution field and the position of the highest temperature point, but because it is difficult to embed the artificial thermocouple into the superhard tool material, and it needs to be calibrated for different materials, the application of the artificial thermocouple has been greatly restricted. big limitations

The semi-artificial thermocouple method is a combination of the natural thermocouple method and the artificial thermocouple method, but its measurement accuracy cannot be continuously stabilized during the milling process, resulting in a decrease in accuracy

Non-contact measurement methods are mainly realized by infrared thermal imaging cameras or infrared spot thermometers. Infrared thermal imaging cameras can display the temperature of the area to be measured through color contrast, but cannot measure the internal temperature, and need to be calibrated for different materials, resulting in low accuracy. Low

The traditional infrared spot thermometer measurement method usually measures the temperature of the exposed part of the milling cutter, but due to the strong instantaneous effect of the cutting temperature, the measurement accuracy is low

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