CN102278934B

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

Info

Publication number: CN102278934B
Application number: CN 201110176525
Authority: CN
Inventors: 李宏滨; 沙卫群; 代桂萍; 滕辉; 丁世平; 徐珍; 王学梅
Original assignee: XIBEI BEARING CO Ltd
Current assignee: XIBEI BEARING CO Ltd
Priority date: 2011-06-28
Filing date: 2011-06-28
Publication date: 2013-03-13
Anticipated expiration: 2031-06-28
Also published as: CN102278934A

Abstract

The invention relates to a calibration method and device of a large-scale curvature sample plate. The device is characterized by comprising a platform, a dial indicator (3) and a lengthening bar (4), wherein the platform is fixedly provided with two adjustable positioners (1) and a central post (5); one end of the lengthening bar (4) is provided with a V-shaped bifurcation, thus the V-shaped bifurcation can abut against the central post (5) tightly and rotates along the central post (5); and the other end of the lengthening bar (4) is fixedly connected with the instrument panel part of the dial indicator (3). Compared with the measurement by adopting a chord height gauge, the measurement by adopting the method and device provided by the invention has a larger range and multiple samples, and can be used for reducing the influences of gross errors such as surface roughness and the like; the calibration accuracy is improved greatly; and by the experimental evidence, the method is applied to the outer spherical surface grinding and machining detection of a large thrust tapered roller bearing, the calibration issue of the sample plate is solved successfully, the calibration accuracy is high, and the whole device has a simple structure, is low in cost and is convenient to use.

Description

Calibration method and the device of large scale curvature model

Technical field

The present invention relates to a kind of calibration method and device of large scale curvature model.

Background technology

The large scale curvature model of indication of the present invention mainly is that radius-of-curvature is at the super-huge model of 1m to 1.6m, existing calibration method mainly is two kinds, the firstth, use three coordinates to detect machine, this will use three coordinates of measurement range about 3 meters and detect machine, a lot of producers all do not have to be equipped with, and it is higher to measure cost.The secondth, use the action instrument to measure, because the action instrument can only be measured one section circular arc in the limited range, unique point very little, will produce very large measuring error, take the circular arc of radius 1.5m as example, use span 60mm action instrument to measure, suppose that the action monitoring error is 0.01mm, be reduced to radius, will produce about 8mm measuring error.

Summary of the invention

The calibration method that the purpose of this invention is to provide a kind of large scale curvature model, but the impact of the gross errors such as the method measurement range is large, the many filtering surface roughness of sampling, calibration accuracy is also higher.

Another object of the present invention provides a kind of calibrating installation of large scale curvature model, and it is simple in structure, and is with low cost, and error is also little.

For achieving the above object, the technical solution used in the present invention is:

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

A kind of calibrating installation of large scale curvature model, its special feature exists, comprise a platform, be fixed with two adjustable locators at this platform, on this platform, also be fixed with a newel, other has a clock gauge and an extension rod, thereby an end of this extension rod can abut against on the newel with the V-type bifurcated and along the newel rotation, and the other end of extension rod is connected with the panel board partial fixing of clock gauge.

But adopt the inventive method and device to compare the impact of the gross errors such as measurement range is large, the many filtering surface roughness of sampling with using the measurement of action instrument, calibration accuracy improves a lot, through evidence, the method is applied in certain oversize thrust taper roll bearing spherical outside surface mill processing detection, has successfully solved the calibrating problem of model, rechecks error less than 0.2mm at three coordinate detection machines afterwards, calibration accuracy is higher, and whole apparatus structure is simple, and is with low cost, easy to use.

Description of drawings

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

Embodiment

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

As shown in Figure 1, a kind of calibrating installation of large scale curvature model, 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, thereby an end of this extension rod 4 can abut against on the newel 5 with the V-type bifurcated and along newel 5 rotations, and the other end of extension rod 4 is connected with the panel board partial fixing of clock gauge 3.

It is as follows to adopt apparatus and method of the present invention to carry out verification process, at first measured model 2 levels are placed on the platform, and the horizontal component of model 2 abuts against on the adjustable locator 1, at first demarcate model 2 curvature nominal size with gauge block during calibrating, then adjusting model 2 positions by adjustable locator 1 makes its circular arc middle part contact with clock gauge 3 table points (gauge head) and 3 pairs in clock gauge is 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, simultaneously depart from the zero-bit situation according to the reading of clock gauge 3 and in time adjust model 2 positions until the stable reading of clock gauge 3 is constant by adjustable locator 1, reading and the departing from of zero-bit of this moment are the deviation of model 2 curvature.

Claims

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).