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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, applied in the direction of grinding machine tool components, measuring/indicating equipment, metal processing machinery parts, etc., can solve the problem that the center and the rotation center do not coincide, such as grinding crankshaft connecting rod neck and other problems

Inactive Publication Date: 2008-09-03
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

Method used

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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

[0057] A preferred embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0058] The tracking method for on-line measurement of roundness error and machine tool spindle error is based on the time-domain signal collected by the three displacement sensors in the tracking-type roundness and linear online measurement mechanism in the tracking measurement, which is transformed into the frequency domain for analysis. The roundness error and systematic error of the eccentrically rotating workpiece are separated.

[0059] see figure 1 The above-mentioned tracking type roundness and diameter online measuring mechanism includes a measuring mechanism base 1 fixedly connected with the grinding wheel frame, and a tracking rocker 3 that swings coaxially with the grinding wheel 2 is installed on the measuring mechanism base 1, and the tracking rocker The outer end of the arm 3 is equipped with three displacement sensors 4, 5, 6 to c...

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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 surface shape of a circular part in a plane perpendicular to its axis. It is a macroscopic geometric shape error. Roundness error directly affects the fitting accuracy, rotation accuracy, friction, vibration, noise, etc. of parts. , so high-precision rotary parts put forward higher and higher requirements for roundness error. 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 roun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q17/00B23Q15/00B24B49/00
Inventor 田应仲李明
Owner SHANGHAI UNIV
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