Method for evaluating influences of double rotary tables on space errors of five-axis machine tool

A space error, double turntable technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficult evaluation, weak influence of dynamic errors of rotating shafts, and no physical meaning.

Active Publication Date: 2015-12-23
烟台南工大环球智能装备有限公司
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Problems solved by technology

However, this theory is only applied to the model of XYC two linear axes and one rotary axis linkage, and the geometric error is a comprehensive item, which generally includes motion error, coupling error and backlash, etc., and does not have a clear and independent It is difficult to directly apply it to the evaluation of the industrial site; moreover, the speed of the rotating axis in the linkage of most five-axis machine tools is not very high, so the influence of the dynamic error of the rotating axis is relatively weak, but the influence of the servo error is more important

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  • Method for evaluating influences of double rotary tables on space errors of five-axis machine tool

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Embodiment Construction

[0059] Below in conjunction with accompanying drawing of description, the present invention will be further described.

[0060] Such as figure 1 As shown, the embodiment of the present invention provides a schematic structural diagram of a vertical double turntable five-axis machine tool. The linear axes of the machine tool are X axis, Y axis and Z axis respectively, and the rotation axes are A axis and C axis respectively.

[0061] For ease of understanding, the process and effect of the present invention will be described below by taking the MCV850 vertical five-axis machining center (the numerical control system is iTNC530) as the specific implementation object.

[0062] The A-axis stroke of the machine tool is -100°~120°, and the C-axis stroke is 0°~360°; after the detection of the ballbar and laser interferometer, β AX =0.002°, γ AX = 0.009°, α CA =-0.006°, β CA = 0.008°, δ xAX =0.002mm, δ yAX =-0.004mm, δ zAX =0.003mm, δ yCA =0.004mm, α YZ =-0.003°, β ZX =0.006...

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Abstract

The invention discloses a method for evaluating the influences of double rotary tables on space errors of a five-axis machine tool. The method includes the steps that a test part model is established; geometric error parameters of the double rotary tables on the five-axis machine tool are measured, and perpendicularity error parameters of three linear axes on the five-axis machine tool are measured; the space errors caused by geometric errors of the double rotary tables are calculated through a homogeneous coordinate transformation matrix; contour errors caused by servo errors of the double rotary tables are calculated through direction vectors of a tool axis; space errors, integrating the geometric errors and the servo errors of the double rotary tables, of the five-axis machine tool are calculated. The space error evaluating method can be used for evaluating the space errors, independently caused by the double rotary tables, of the five-axis machine tool, and a scientific basis is provided for reasonably adjusting structural parameters of the double rotary tables at the structural design stage of the five-axis machine tool through early evaluation.

Description

technical field [0001] The invention relates to a space error evaluation method, in particular to a method for evaluating the influence of a double turntable on the space error of a five-axis machine tool, and belongs to the field of machine tool precision design. Background technique [0002] Five-axis linkage machine tools have obvious efficiency advantages for the processing of complex parts, and are widely used in aerospace and precision mold industries. Spatial error is an important performance index of multi-axis linkage machine tools, especially five-axis linkage machine tools. Five-axis linkage machine tools have various structures, and there are three types currently used in industry. One is the spindle head rotating and swinging structure, which is mainly used to process large parts; the other is the double turntable structure, which is mainly used to process small and medium-sized precision parts; the other is the spindle head swinging and table rotating structur...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 丁文政朱晓春汪木兰高海涛郝飞
Owner 烟台南工大环球智能装备有限公司
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