Five-axis linkage machine tool rotation axis geometrical parameter measuring method

A five-axis linkage machine tool and geometric parameter technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of unguaranteed measurement premise, use of precision defects, cumbersome operation steps, etc., to achieve changing the direction of the rotation axis and insufficient accuracy, lowering requirements, The effect of simple equipment

Active Publication Date: 2016-05-11
HUAZHONG UNIV OF SCI & TECH +1
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Problems solved by technology

However, in practice, the two axes are not necessarily parallel to the coordinate axes, nor are they necessarily orthogonal to each other. This measurement premise cannot be guaranteed, which will cause measurement errors
[0005] 2) The general inspection of the roundness of the baseball head and the concentricity of the center of the ball head and the axis of rotation of the spindle has low accuracy, which is not suitable for high-precision measurement occasions, resul

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  • Five-axis linkage machine tool rotation axis geometrical parameter measuring method
  • Five-axis linkage machine tool rotation axis geometrical parameter measuring method
  • Five-axis linkage machine tool rotation axis geometrical parameter measuring method

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[0044] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments, and is not intended to limit the present invention.

[0045] figure 1 It is the physical diagram of the test object of the test object of the Topu C50AC dual-turntable five-axis machine tool in the embodiment of the present invention. The A turntable is the active axis, the C turntable is the driven axis, and the RTCP parameters of the measurement object are:

[0046] 1) The axis direction of the rotation axis of the A turntable;

[0047] 2) The axis direction of the rotation axis of the C turntable;

[0048] 3) The axis of the rotation axis of the A turntable is offset;

[0049] 4) The axis of the rotation axis of the C turntable is offset.

[0050] figure 2 It is a schematic diagram of the step flow in the method of the embodiment of the present inventi...

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Abstract

The invention discloses a five-axis linkage machine tool rotation axis geometrical parameter measuring method based on a trigger-type measuring head and belongs to the field of numerical control system and machine tool structure parameter measurement. The method comprises the steps of instrument installation, parameter setting, collision acquisition and RTCP parameter calculation. Through a numerical control system, a measuring head probe is driven to collide with a standard ball and impact point machine tool coordinates are latched; ball center coordinate corresponding to each demonstration point is calculated according to the coordinates; and driving rotating shaft and driven rotating shaft axis direction and space positions are fitted for each standard ball center coordinate through a least square data processing method, and thus RTCP parameters are obtained. The method can finish automatic precise measurement of five-axis linkage machine tool rotation axis geometrical parameters (RTCP parameters), and realize rotation cutting tool central point accuracy control.

Description

technical field [0001] The invention relates to the technical field of numerical control system and machine tool structural parameter measurement, and aims to realize a method for measuring the geometric parameter of the rotary axis of a five-axis linkage machine tool. Background technique [0002] Rotary tool center control RTCP (Rotational Tool Center Point) technology is an extremely important function of the five-axis linkage CNC system. The RTCP function can directly program the trajectory of the tool center point, making the CNC program independent of the specific machine tool structure. The CNC system will automatically calculate and maintain the tool The center is always on the programmed trajectory, and the non-linear error caused by the movement of the rotary axis will be compensated by the movement of the linear axis. When the five-axis machine tool does not have the RTCP function, the tool rotates around the center of the rotary axis when the rotary axis moves, a...

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Application Information

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IPC IPC(8): G01B21/00
Inventor 陈吉红凌文锋顾潇蒋威彭锦群卢圣勇李雷
Owner HUAZHONG UNIV OF SCI & TECH
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