CN102278934B - Calibration method and device of large-scale curvature sample plate - Google Patents

Abstract

The invention relates to a method and device for verifying a large-scale curvature template, which is characterized in that it includes a platform on which two adjustable positioners (1) are fixed, and a central column (5) is also fixed on the platform ), another dial indicator (3) and an extension rod (4), one end of the extension rod (4) has a V-shaped fork so that it can be close to the center column (5) and along the center column (5) ) to rotate, and the other end of the extension rod (4) is fixedly connected with the instrument panel part of the dial gauge (3). Compared with the method and device of the invention, the measurement range is larger, the sampling is more, and the influence of rough errors such as surface roughness can be filtered out, and the verification accuracy is greatly improved. It is proved by experiments that the method is applied to a large In the testing of thrust tapered roller bearing outer spherical surface grinding, the verification problem of the model has been successfully solved, the verification accuracy is high, and the whole device is simple in structure, low in cost and easy to use.

Description

Verification method and device of large-scale curvature sample

technical field

The invention relates to a verification method and device for a large-scale curvature template.

Background technique

The large-scale curvature template referred to in the present invention is mainly a super-large template with a curvature radius of 1m to 1.6m. There are mainly two kinds of existing verification methods. The first is to use a three-coordinate detector, which will use a measurement range of 3 Many manufacturers are not equipped with a three-coordinate inspection machine with a size of about 10 meters, and the measurement cost is relatively high. The second is to use the chord height meter to measure. Since the chord height meter can only measure a section of arc within a limited range, too few feature points will cause very large measurement errors. Taking an arc with a radius of 1.5m as an example, use a span Measured by the chord height meter at a distance of 60mm, assuming that the chord height measurement error is 0.01mm, and returning to the radius, there will be a measurement error of about 8mm.

Contents of the invention

The object of the present invention is to provide a verification method for a large-scale curvature template, which has a large measurement range, many samples, can filter the influence of gross errors such as surface roughness, and has high verification accuracy.

Another object of the present invention is to provide a large-scale curvature test device with simple structure, low cost and small error.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A verification method for a large-scale curvature sample, which is particularly characterized in that it includes the following steps: first place the sample to be measured horizontally on a plane, then select a center point on the plane next to the sample, and take another dial gauge And an extension rod, one end of the extension rod is hinged with the center point, and the other end of the extension rod is fixedly connected with the dial indicator. When checking, first use the gauge block to calibrate the nominal curvature of the sample, and then adjust the position of the sample so that the middle of the arc is in line with the dial gauge. Contact the tip of the submeter and set the dial gauge to zero. At this time, rotate the extension rod clockwise or counterclockwise to move the dial gauge along the arc surface of the sample. At the same time, adjust the sample in time according to the deviation of the reading of the dial gauge from zero. Position until the reading of the dial indicator is stable, and the deviation between the reading and the zero position at this time is the deviation of the curvature of the sample.

A verification device for a large-scale curvature template, which is special in that it includes a platform on which two adjustable positioners are fixed, a central column is also fixed on the platform, and a dial gauge and An extension rod, one end of the extension rod has a V-shaped fork so that it can be close to the center column and rotate along the center column, and the other end of the extension rod is fixedly connected with the instrument panel part of the dial indicator.

Compared with the method and device of the invention, the measurement range is larger, the sampling is more, and the influence of rough errors such as surface roughness can be filtered out, and the verification accuracy is greatly improved. It is proved by experiments that the method is applied to a large In the inspection of thrust tapered roller bearing outer spherical grinding, the verification problem of the sample was successfully solved, and the re-inspection error on the three-coordinate inspection machine was less than 0.2mm, the verification accuracy was high, and the whole device was simple in structure, low in cost and easy to use .

Description of drawings

Accompanying drawing 1 is the structural representation of the device of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1, a verification device for a large-scale curvature template includes a platform on which two adjustable positioners 1 are fixed, a central column 5 is also fixed on the platform, and a thousand points Gauge 3 and an extension rod 4, one end of the extension rod 4 has a V-shaped fork so that it can be abutted on the center column 5 and rotate along the center column 5, and the other end of the extension rod 4 is connected to the instrument of the dial gauge 3 The disk part is fixedly connected.

Using the device and method of the present invention to carry out the verification process is as follows, first place the sample 2 to be measured horizontally on the platform, and the horizontal part of the sample 2 is close to the adjustable positioner 1, first use the measuring block to calibrate the nominal curvature of the sample 2 during the verification Size, and then adjust the position of the template 2 through the adjustable locator 1 so that the middle of the arc is in contact with the tip (probe) of the dial gauge 3 and zero the dial gauge 3. At this time, rotate clockwise or counterclockwise to lengthen Rod 4 moves the dial indicator 3 along the arc surface of the model 2, and at the same time adjusts the position of the model 2 through the adjustable positioner 1 in time according to the deviation of the reading of the dial indicator 3 from zero until the reading of the dial indicator 3 is stable , the deviation between the reading and the zero position at this time is the deviation of the curvature of the sample 2.

Claims (2)

1. the calibration method of a large scale curvature model, it is characterized in that, comprise the steps: at first measured model (2) level to be placed on the plane, then select a central point on the other plane of model (2), other gets a clock gauge (3) and an extension rod (4), one end and the central point of this extension rod (4) are hinged, and the other end of extension rod (4) is fixedly connected with clock gauge (3), at first demarcate model (2) curvature nominal size with gauge block during calibrating, then adjust model (2) position its circular arc middle part is contacted with clock gauge (3) table point and with clock gauge (3) to zero, clockwise or counter clockwise direction rotating lengthening bar (4) makes clock gauge (3) move along the arc-shaped surface of model (2) at this moment, depart from according to the reading of clock gauge (3) simultaneously that the zero-bit situation is in time adjusted model (2) position until the stable reading of clock gauge (3) is constant, reading and the departing from of zero-bit of this moment are the deviation of model (2) curvature.

2. the calibrating installation of a large scale curvature model, its feature exists: comprise a platform, be fixed with two adjustable locators (1) at this platform, on this platform, also be fixed with a newel (5), other has a clock gauge (3) and an extension rod (4), this extension rod (4) thus an end can to abut against newel (5) with the V-type bifurcated upper and along newel (5) rotation, and the other end of extension rod (4) is connected with the panel board partial fixing of clock gauge (3).

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