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Prediction method for turning temperature rise mean value of tool

A prediction method and turning technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of not considering the influence of turning vibration and turning temperature, etc.

Active Publication Date: 2017-08-18
XUZHOU NORMAL UNIVERSITY
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Problems solved by technology

[0003] There are many factors that affect the turning temperature. The existing temperature empirical formula generally only gives the relationship between temperature and turning parameters, without considering the influence of turning vibration and ambient temperature on turning temperature.
[0004] In the existing thermal-mechanical coupling analysis, the currently applied constitutive equation generally only gives the relationship between turning stress, strain and temperature, without considering the influence of turning vibration

Method used

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  • Prediction method for turning temperature rise mean value of tool
  • Prediction method for turning temperature rise mean value of tool
  • Prediction method for turning temperature rise mean value of tool

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Embodiment Construction

[0069] The present invention will be further explained in conjunction with the drawings.

[0070] Select the turning tool under normal use, and carry out the turning test according to the test plan in Table 1. The amount of each back tool is a p Carry out 12 tests, a total of 36 turning tests, each test time is set to 1 minute.

[0071] Table 1: Test turning parameters

[0072]

[0073] Such as figure 1 As mentioned, a test system for collecting turning temperature signals and tool three-way vibration signals is established.

[0074] The temperature collection system collects the temperature at the tip of the rake face of the tool through the OS523E-2 infrared thermometer produced by the American OMEGA company.

[0075] The vibration signal acquisition system collects the three-directional vibration signal at the lower surface of the tool holder corresponding to the tip of the tool rake face through the piezoelectric three-directional acceleration sensor, and the three-directional vibr...

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Abstract

The invention discloses a prediction method for a turning temperature rise mean value of a tool. A signal collected by a signal collection system is processed to obtain a three-direction acceleration mean value and a temperature rise mean value in each turning test; a multiple regression model, about turning three-direction vibration acceleration and turning parameters, of the temperature rise mean value of the tool is obtained based on a least square method; and the model is used for predicting the temperature rise mean value of the tool under different turning parameters and different turning vibrations. According to the method, the turning temperature rise is predicted by integrating the turning vibrations and the turning parameters, and turning heat is analyzed by adopting the temperature rise value (relative temperature), so that the influence of difference of different environment temperatures on the turning heat can be eliminated; and a necessary constitutive equation can be provided for theoretical and numerical analog calculation of a thermal mechanical coupling characteristic of the turning, and the difficulty in real-time measurement of the turning temperature can be relieved to a certain extent.

Description

Technical field [0001] The invention relates to the field of machining, in particular to a method for predicting the mean value of tool turning temperature rise. Background technique [0002] During the turning process, there is direct contact between the tool and the workpiece. Due to the large amount of turning heat generated by the extrusion, shearing, friction, etc. between the tool and the workpiece, the temperature of the turning tool rises and the turning vibration is generated. Turning heat will cause turning thermal stress, tool softening, etc., thereby accelerating tool wear, resulting in tool damage, increased surface roughness, and reduced dimensional accuracy. At the same time, turning vibration will also aggravate tool wear and increase turning temperature. Therefore, it is of great significance to study tool temperature rise based on turning vibration, and it has important guiding significance for the selection of turning parameters, the replacement of tools, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 李顺才袁冠雷吴明明杨睿
Owner XUZHOU NORMAL UNIVERSITY
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