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Method and system for thermal deformation error compensation of five-axis CNC machine tool spindle

A technology of thermal deformation error and CNC machine tools, which is applied in the direction of automatic control devices, metal processing machinery parts, metal processing equipment, etc., to achieve the effects of low cost, guaranteed processing accuracy, and short debugging cycle

Active Publication Date: 2019-12-10
WUHAN HUAZHONG NUMERICAL CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for compensating the thermal deformation error of the main shaft of a five-axis CNC machine tool, which aims to solve the problem of machining accuracy caused by the deformation of the main shaft during the heating process of the existing machine tool

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  • Method and system for thermal deformation error compensation of five-axis CNC machine tool spindle
  • Method and system for thermal deformation error compensation of five-axis CNC machine tool spindle
  • Method and system for thermal deformation error compensation of five-axis CNC machine tool spindle

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Embodiment 1

[0052] Such as figure 2 and image 3 As shown, the embodiment of the present invention provides a method for compensating the thermal deformation error of the spindle of a five-axis CNC machine tool according to the above principles, including the following steps:

[0053]S1, start and run the program for machining when the machine tool is completely cold, and obtain the heat transfer lag time t1, heating time t2 and maximum deformation S of the spindle max , according to lag time t1, heating time t2 and maximum deformation S max Calculate the exponential coefficient k of the exponential curve of the corresponding relationship between the thermal deformation of the spindle and the heat engine time, and calculate the lag time t1, heating time t2, maximum deformation S max And the value of the index coefficient k is entered into the compensation parameter of the numerical control system.

[0054] S2, CNC system according to the lag time t1, heating time t2, maximum deformati...

Embodiment 2

[0075] Such as Figure 4 As shown, the embodiment of the present invention also provides a five-axis CNC machine tool spindle thermal deformation error compensation system, including a parameter acquisition module, a spindle thermal deformation calculation module, a tool axis direction calculation module, and a compensation module; the functions of each module are determined by the computer program implement.

[0076] The parameter acquisition module is used to acquire the heat transfer lag time t1 of the main shaft, the heating time t2 and the maximum deformation S max And the index coefficient k, and establish the relationship model between the thermal deformation of the main shaft and the thermal engine time. In this embodiment, the relationship model between the thermal deformation of the main shaft and the heating time established by the parameter acquisition module is as follows:

[0077]

[0078] Among them, t is the heating time, s is the thermal deformation of th...

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Abstract

The invention provides a five-axis numerical control machine tool spindle heat deformation error compensating method and system. The method comprises the following steps of starting up for running a program for processing in a complete cooling machine state of a machine tool, acquiring the heat transfer lag time t1, the temperature rise time t2 and the maximum deformation Smax of a spindle as wellas an exponential coefficient k of an exponential type curve of a corresponding relation between the heat deformation of the spindle and the warm-up time, and inputting the above parameters into numerical control system compensating parameters; calculating the heat deformation s of the spindle corresponding to the warm-up time t in real time through a numerical control system; calculating a toolaxis direction through the numerical control system; and resolving the heat deformation s of the spindle onto three linear axes for compensating the linear axes according to the tool axis direction. According to the five-axis numerical control machine tool spindle heat deformation error compensating method provided by the invention, the deformation is standardized in advance according to the relation between the heat deformation of the machine tool spindle and the warm-up time, and compensation is carried out along the tool axis direction in real time during a warm-up process, so that the processing precision of parts is ensured, the cost is low, and the debugging period is short.

Description

technical field [0001] The invention relates to the technical field of numerical control machining, in particular to a method and system for compensating thermal deformation error of a spindle of a five-axis numerical control machine tool. Background technique [0002] In recent years, high-precision machining technology has become the focus of research in the field of CNC machining technology and the future development direction. The research content includes high-precision machine tools, high-resolution motors, high-response servo drives, high-precision interpolation and comprehensive error compensation. The research shows that the spatial geometric error and thermal error of the machine tool are one of the main reasons affecting the machining accuracy, accounting for more than 70%. Therefore, it is an effective technical means to improve the machining accuracy through system compensation technology, especially in the current five-axis high-end In the industrial environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q15/18
CPCB23Q15/18
Inventor 朱志红邹捷杨祥王旭尹乐周丹胡洁
Owner WUHAN HUAZHONG NUMERICAL CONTROL