CN103512498A

CN103512498A - Method for measuring run-out error in noncontact mode

Info

Publication number: CN103512498A
Application number: CN201310470279.5A
Authority: CN
Inventors: 杨华
Original assignee: INNER MONGOLIA INSTITUTE OF AEROSPACE POWER MACHINERY TEST
Current assignee: INNER MONGOLIA INSTITUTE OF AEROSPACE POWER MACHINERY TEST
Priority date: 2013-09-26
Filing date: 2013-09-26
Publication date: 2014-01-15

Abstract

The invention relates to a method for measuring a run-out error in a noncontact mode. A universal tool-measuring microscope aims at generatrix at the diametrical position of the reference axis of a measured workpiece, a value is read, and the reference axis is obtained through calculation; the measured workpiece is rotated for one circle, in the process, difference values of a reference axis value and the read value is obtained in a section mode, wherein the read value is obtained by aiming the universal tool-measuring microscope at the generatrix on one side of the measured axis, a range value is obtained according to all the difference values, namely a radial run-out error on a single measurement section. The method for measuring the run-out error in the noncontact mode can solve the problem that the radial circle run-out error of a small-size workpiece is difficult to measure, wherein the workpiece is not provided with a center hole and is not easy to fix. The method further can be popularized to measurement of inclined circle run-out, end face circle run-out, full run-out and coaxiality errors.

Description

The method of non-cpntact measurement runout error

Technical field

The invention belongs to geometric sense metering field, relate to the measuring technique of runout error, be specifically related to the non-contact measurement method of runout error.

Background technology

To be associated actual feature return around datum axis the maximum jitter amount that circles or allow during continuous rotary to runout error, is exactly the poor of the maximum that records on assigned direction of indicator and least count.Conventionally runout error is to adopt indicator to measure by contact method, the datum axis of the method is embodied by V-type frame or center hole, as shown in Fig. 1 (a) and Fig. 1 (b), be about to measured workpiece be fixed on V-type frame or two top between, one clock gauge is contacted with measured circle cylinder is vertical, at measured workpiece, return clock gauge reading maximum difference in the process of circling and be the radial run-out on single measurement cross section, as stated above, measure maximal value in the jerk value recording on ，Qu Ge cross section, several cross sections as this tested cylindrical radial run-out.

Little and without the workpiece of center hole for size, owing to there is no center hole, can not adopt top fixing method; If adopt V-type frame to fix, because size is little, during clock gauge contact workpiece, easily make workpiece produce displacement, so adopt contact method measurement to have the problem of operating difficulties.

Summary of the invention

The object of the present invention is to provide a kind of new method of non-cpntact measurement runout error, for solving available technology adopting contact method measurement size problem little and operating difficulties during without the run-out error of the workpiece of center hole.

To achieve these goals and other relevant objects, the invention provides a kind of method of non-cpntact measurement runout error, comprise the steps: first fixedly measured workpiece, measured workpiece can axial-rotation; Measured workpiece after fixing is placed on universal tool-measuring microscope worktable, and that by universal tool-measuring microscope, aims at measured workpiece reference axis calculates datum axis to path position bus reading value; Revolution measured workpiece one week, in this process, segmentation is obtained universal tool-measuring microscope and is aimed at the reading of measured axis one edges generating line and the difference of datum axis numerical value, by all differences, tries to achieve extreme difference value, is the radial circular run-out error on single measurement cross section.

Alternatively, measure as stated above the maximal value in the runout error recording on ，Qu Ge cross section, several cross sections, as the radial circular run-out error of this measured workpiece.

Alternatively, adopt fixedly measured workpiece of V-type frame, and V-type frame is for supporting the non-reference axis part of measured workpiece.

Alternatively, in one week process of revolution measured workpiece, often turn over 30 °, carry out one-shot measurement, obtain universal tool-measuring microscope and aim at the reading of measured axis one edges generating line and the difference of datum axis numerical value.

Compared to prior art, the invention provides a kind of new method of non-cpntact measurement runout error, solution size is little and measure a difficult problem without the workpiece runout error of center hole, makes up the deficiency that current contact method is measured runout error, and feasible by analysis on Uncertainty and case verification the present invention.

Accompanying drawing explanation

Fig. 1 adopts clock gauge contact measurement runout error schematic diagram, and Fig. 1 (a) adopts V-type frame to support to measure, and Fig. 1 (b) adopts center hole to support to measure;

Fig. 2 is measured workpiece schematic diagram;

Fig. 3 is measured workpiece scheme of installation.

In figure, 1 is clock gauge; 2 is V-type frame; 3 is top.

Embodiment

Below in conjunction with accompanying drawing and instantiation, describe the present invention.

It should be noted that, the every details in this instructions also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.

Take measured workpiece shown in Fig. 2 as example, the φ d1 axis A of take is benchmark, measure φ d2 axle radial circular run-out error, because this workpiece size is little, two ends do not have center hole, if adopt indicator contact method to measure, workpiece is bad fixing, make to measure and cannot carry out, so adopt the noncontact measuring method of universal tool-measuring microscope to measure runout error.Measuring process is as follows:

Workpiece is installed on V-type frame 2, as shown in Figure 3, not necessarily with reference axis, contact with V-type frame 2, to facilitate universal tool-measuring microscope observation reference axis and measured axis bus, be advisable, and be placed in together on the glass table of universal tool-measuring microscope, adjust universal tool-measuring microscope jib, make the tested bus image definition of workpiece in goniometer eyepiece, adjust universal tool-measuring microscope worktable, make φ d1 cylinder axis be parallel to longitudinal rail moving direction.

Universal tool-measuring microscope longitudinal rail maintains static, and with goniometer eyepiece rice word line, aims at respectively φ d1 right cylinder two edges generating lines, records universal tool-measuring microscope horizontal read number a1, a2, obtains the position of datum axis A

in order to reduce the not parallel error of bringing of reference axis and longitudinal rail, averaged and obtained by the A value in the two or more cross sections on reference axis in the position of datum axis, then with goniometer eyepiece rice word line, aim at the cylindrical edges generating line of φ d2, read universal tool-measuring microscope horizontal read number B, obtain C=|B mono-A|.

Right cylinder often turns over about 30 °, carries out one-shot measurement, turns over successively 360 °, obtains extreme difference value in all C values as the radial run-out in this cross section.At the equally distributed San Ge of φ d2 right cylinder cross section I, II, III, measure respectively radial run-out, the maximal value of usining is wherein as final measurement.

In sum, the invention provides a kind of new method of non-cpntact measurement runout error, wherein adopt universal tool-measuring microscope carry out non-cpntact measurement size little simple to operate during without center hole workpiece, measuring accuracy is high, and the present invention also can be applied to that oblique circle is beated, in the measurement of Circular Run-out Tolerance, total run-out and coaxiality error.

Claims

1. a method for non-cpntact measurement runout error, comprises the steps: first fixedly measured workpiece, and measured workpiece can axial-rotation; Measured workpiece after fixing is placed on universal tool-measuring microscope worktable, and that by universal tool-measuring microscope, aims at measured workpiece reference axis calculates datum axis to path position bus reading value; Revolution measured workpiece one week, in this process, obtains universal tool-measuring microscope and aims at the reading of measured axis one edges generating line and the difference of datum axis numerical value, by all differences, tries to achieve extreme difference value, is the radial circular run-out error on single measurement cross section.

2. the method for a kind of non-cpntact measurement runout error according to claim 1, is characterized in that: measure as stated above the maximal value in the runout error recording on ，Qu Ge cross section, several cross sections, as the radial circular run-out error of this measured workpiece.

3. according to the method for the arbitrary described a kind of non-cpntact measurement runout error of claim 1 or 2, it is characterized in that: adopt fixedly measured workpiece of V-type frame, and V-type frame is for supporting the non-reference axis part of measured workpiece.

4. according to the method for the arbitrary described a kind of non-cpntact measurement runout error of claim 1 or 2, it is characterized in that: in one week process of revolution measured workpiece, often turn over 30 °, carry out one-shot measurement, and obtain universal tool-measuring microscope and aim at the reading of measured axis one edges generating line and the difference of datum axis numerical value.