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Tracking method of on-line measuring roundness error and machine tool main axle error

A roundness error, machine tool spindle technology, used in grinding machine parts, measuring/indicating equipment, metal processing machinery parts, etc., can solve the problem of center and rotation center misalignment, such as grinding crankshaft connecting rods, etc.

Inactive Publication Date: 2007-03-14
SHANGHAI UNIV
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Problems solved by technology

During the use of the traditional roundness error separation method, the sensor is installed in a fixed position and the workpiece to be detected rotates around the center of rotation. If it does not coincide with the center of rotation, such as grinding crankshaft pin), it is impossible to separate the roundness error of the measured workpiece from the machine tool system error online

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  • Tracking method of on-line measuring roundness error and machine tool main axle error
  • Tracking method of on-line measuring roundness error and machine tool main axle error
  • Tracking method of on-line measuring roundness error and machine tool main axle error

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Embodiment Construction

[0056] A preferred embodiment of the present invention is detailed as follows with reference to the accompanying drawings:

[0057] This tracking method for online measurement of roundness error and machine tool spindle error is based on the time domain signals collected by the three displacement sensors in the tracking measurement mechanism of the tracking roundness and straight line measurement mechanism, which are transformed into the frequency domain for analysis. The roundness error of the eccentric rotating workpiece is separated from the system error.

[0058] Referring to Fig. 1, the above-mentioned tracking roundness and diameter online measuring mechanism includes a measuring mechanism base 1 fixedly connected to the grinding wheel frame, and a tracking rocker 3 swinging coaxially with the grinding wheel 2 is installed on the measuring mechanism base 1 , Three displacement sensors 4, 5, 6 are installed on the outer end of the tracking rocker arm 3 to contact the outer ci...

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Abstract

The invention relates to a method for online tracking and measuring the roundness error and the machine tool main spindle error. It measures the tracking roundness and the diameter making use of three displacement sensors in the online measuring device, and transforms the time-domain signal is collected when measuring into frequency domain signal then analyses the signal. It separates the roundness error coming from the eccentric rotations from system error online, so achieves online measure of the roundness error and system error and enhances the measurement accuracy.

Description

Technical field [0001] The invention relates to a method for online measurement of roundness error and machine tool spindle error, in particular to a method for measuring roundness error and machine tool spindle error in eccentric circle tracking grinding. Background technique [0002] Roundness error refers to the degree of out-of-roundness of the inner surface of a circular part in a plane perpendicular to its axis. It is a macroscopic geometric shape error. The roundness error directly affects the matching accuracy, rotation accuracy, friction, vibration, noise, etc. Therefore, high-precision rotating parts have put forward higher and higher requirements for roundness errors. During the use of the traditional roundness error separation method, the sensor is installed in a fixed position and the detected workpiece rotates around the center of rotation. Therefore, if the installation eccentricity is greater than the sensor range, or the measured workpiece rotates eccentrically a...

Claims

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Application Information

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IPC IPC(8): B23Q17/00B23Q15/00B24B49/00
Inventor 田应仲李明
Owner SHANGHAI UNIV
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