The Method of Measuring Three-Dimensional Error of Machine Tool Spindle Space Using Double Ballbar
A technology of machine tool spindles and ballbars, which is applied in the direction of measuring/indicating equipment, metal processing machinery parts, metal processing equipment, etc., can solve problems such as coupling errors and the inability to detect geometric errors of spindles at the output end of multi-axis machine tools, and achieve benefits The effect of error identification
Active Publication Date: 2021-11-09
HANGZHOU DIANZI UNIV
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Problems solved by technology
However, due to the assembly relationship between the axes, the installation eccentricity of the transmission shaft, the transmission gap, thermal deformation and other reasons, the movement of the spindle at the output end of the multi-axis machine tool is not only in the ideal plane, but the coupling error in multiple directions
However, the ballbar product itself can only detect the error change in the sensitive direction along its axis, and finally get the error in two directions, and cannot detect the geometric error in other directions of the output spindle of the multi-axis machine tool
Method used
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[0046] The present invention will be further described below in conjunction with accompanying drawing.
[0047] Such as figure 1 , 2 As shown in and 3, the method of measuring the three-dimensional error of the spindle space of the machine tool using a double ballbar is as follows:
[0048] Step 1. Support the round cover 7 on the central shaft 5 through the flange bearing 1 22 and the flange bearing 2 6, that is, the inner ring of the flange bearing 1 22 is set outside the central shaft 5, and the round cover 7 is set on the flange bearing 1 22 outside the outer ring, the inner ring of the flange bearing II 6 is sleeved outside the central shaft 5, the outer ring of the flange bearing II 6 is placed in the round cover 7, and the two ends of the round cover 7 are respectively covered by the outer ring of the flange bearing II 6 Ring and the outer ring of the flange bearing-22 are axially limited; then, the external thread at the bottom of the magnetic ball socket-4 is connec...
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The invention discloses a method for measuring the three-dimensional error of the spindle space of a machine tool by using double ballbars. The ballbar product itself can only detect changes in error along its axis of sensitivity. In the present invention, the ballbar one connected with the extension rod and the main shaft tool cup is used to measure the error produced by the circular interpolation motion of the main shaft of the multi-axis machine tool in the theoretical plane as the traditional ballbar; The second ballbar connected with the extension bar is used to measure the motion error of the main shaft perpendicular to the theoretical plane direction of the main shaft motion of the multi-axis machine tool. The present invention uses two ballbars to measure at the same time, can accurately obtain the geometric error amount of the three-dimensional direction of the space of the main shaft of the multi-axis machine tool at the measured position; Rods of different lengths are installed to adjust the length ratio on both sides of the central axis, and the error is multiplied or reduced, which is beneficial to the high-precision detection of the error by the second ballbar.
Description
technical field [0001] The invention belongs to the technical field of machine tool error detection, and in particular relates to a device and method for measuring three-dimensional errors in the spindle space of a multi-axis machine tool by using a double ballbar. Background technique [0002] Modern industry has higher and higher requirements for the machining accuracy of multi-axis machine tools. However, issues such as the assembly of the axes of the multi-axis machine tool, the mutual kinematic relationship and its manufacturing accuracy will affect the machining accuracy of the multi-axis machine tool. Therefore, detecting the motion error of the output spindle of a multi-axis machine tool has become an important task, and how to quickly and effectively detect the motion error of the output spindle of a multi-axis machine tool is the key and the basis for error compensation. [0003] Among the various existing measuring equipment, the ballbar has the advantages of low...
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IPC IPC(8): B23Q17/00
CPCB23Q17/00
Inventor 王文孙涛吴海梅陈占锋卢科青杨贺桑志谦郭宗福
Owner HANGZHOU DIANZI UNIV