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Method for detecting presence of thermo-responsive point related with thermal deformation of main shaft

A thermally sensitive point, thermal deformation technology, applied in instruments, computer control, simulators, etc., can solve problems such as difficult to apply thermal error compensation of machine tools, poor robustness of thermal error models, and no solution to the distribution law. The effect of wide range, improving machining accuracy and reducing production cost

Inactive Publication Date: 2014-04-09
XI AN JIAOTONG UNIV
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Problems solved by technology

The thermal error model of the machine tool usually established is closely related to the process parameters, resulting in the poor robustness of the thermal error model established according to certain process parameters, which is difficult to apply to the thermal error compensation of the machine tool
Whether there is a thermal error model that has nothing to do with the process but is only related to the temperature of the measuring point, or whether there is a thermally sensitive point, and if there is, how is its distribution law not yet seen a complete plan

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  • Method for detecting presence of thermo-responsive point related with thermal deformation of main shaft
  • Method for detecting presence of thermo-responsive point related with thermal deformation of main shaft
  • Method for detecting presence of thermo-responsive point related with thermal deformation of main shaft

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] refer to Figure 1-4 , a device for detecting the existence of thermally sensitive points related to the thermal deformation of the main shaft, including four parts: a mechanical system, a power control system, a measurement system and a data processing system, the mechanical system includes a main shaft 1, and the power control system includes Control the output power of the heating element and install the computer with Labview software 4, the first Advantech PCI-1723 analog output card 5, the first wiring port 6 and the heating element, such as figure 1 shown. The measurement system includes a thermistor 3, an eddy current sensor 2, a conditioning module 7, a second wiring port 8, and a second Advantech PCI-1712 32-way analog output card 9, such as Figure 4 shown. Among them, the spindle center hole is obtained by drilling a hole in the spindle center al...

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Abstract

Disclosed is a method for detecting the presence of a thermo-responsive point related with the thermal deformation of a main shaft. By changing the temperature of a heating element, the temperature field distribution of the main shaft is changed. Thermistors and eddy current sensors transmit acquired information to a computer. Then, Labview software is employed to analyze and process the information and fuzzy clustering and linear regression methods are employed to carry out the processing. According to the detecting method provided by the invention, the thermistors can be disposed at places of different radiuses so that if a function relation can be established between the temperature at the places of different radiuses and the deformation of the main shaft, the presence of the thermo-responsive point can be determined; and if the function relation cannot be established, the presence of the thermo-responsive point can be denied. According to the invention, if the main shaft do have the thermo-responsive point, the deformation of the main shaft under different technology conditions can be obtained in a more accurate manner based on the thermo-responsive point so that the controlling quantity of an error compensation control system can be changed based on the deformation of the main shaft under different working conditions, thereby increasing the working precision of the main shaft.

Description

technical field [0001] The invention relates to a method for detecting the thermal deformation of the main shaft of a machine tool, in particular to a method for detecting whether there are thermal sensitive points related to the thermal deformation of the main shaft. Background technique [0002] With technological revolutions time and time again, high precision has increasingly become the direction and goal of various processing and production. However, the machining error caused by the deformation of the spindle caused by the temperature change of the machine tool under working conditions has always been an important factor restricting the development of the processing and manufacturing industry. According to some data, the machining error caused by the thermal deformation of the machine tool accounts for 30% of the entire machining error. 70%. By using the compensation system to feedback and adjust the measurement of the thermal deformation of the machine tool spindle, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/404
Inventor 张东升李泽州梅雪松张政田爱芬
Owner XI AN JIAOTONG UNIV
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