A device for measuring the profile of a concavo-convex spherical surface

Abstract

The application provides a device for measuring the profile of a concave-convex spherical surface. The device comprises a support base, a mounting plate rotatably mounted on the support base, a plurality of ball heads rotatably mounted on the mounting plate, a plurality of half-spherical blocks fixedly mounted on the ball heads, two half-spherical blocks on each ball head, a plurality of micrometers mounted on the ball heads, and a bearing fixedly mounted on the support base, a rotating shaft fixedly mounted on the mounting plate, and the bearing fixedly sleeved on the rotating shaft. The device for measuring the profile of a concave-convex spherical surface has the advantages of convenient use, high space utilization efficiency and easy dust cleaning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concave and convex spherical profile measurement, and particularly relates to a device for measuring concave-convex spherical profile. BACKGROUND

[0002] Bridge spherical support is an important structure force transmission device in highway and railway bridge, which rotates through the small hemispherical spherical crown lining plate assembly to adapt to the displacement and rotation of the bridge caused by live load, wind load, concrete shrinkage and other factors. Whether the rotation performance of the spherical support meets the design is the core parameter for the long-term stability of the bridge structure, and the spherical profile of the spherical crown lining plate assembly is a key technical index affecting whether the rotation capacity of the spherical support can be kept in a reasonable range for a long time. Therefore, the detection of the spherical profile of the spherical crown lining plate is very important for the spherical support product.

[0003] There are two schemes in the prior art for measuring the spherical profile, as follows:

[0004] Direct measurement of the profile template: the common measurement means in the factory is to directly place the curvature template on the surface of the spherical crown, and measure by using a caliper. This method is contrary to the definition of profile, and when the radius of the template does not match the radius of the spherical crown workpiece, the measurement result is only the processing tolerance of the workpiece, not the shape tolerance (equivalent to evaluating whether the two balls of different sizes are round enough). This method has no theoretical support.

[0005] Three-coordinate measuring machine measurement: the most accurate measurement means at present, which can evaluate the processing tolerance and shape tolerance of the workpiece at the same time, that is, the size of the spherical crown workpiece is first measured, and then the spherical profile is measured based on the size. The weight of each spherical crown workpiece is about 40 kg, so the biggest problem of this method is poor measurement efficiency. When large-scale measurement of the spherical profile of the spherical crown lining plate is performed, it is difficult to move each workpiece to the three-coordinate measuring machine. This method is more suitable for spot check detection, and is not suitable for large-scale detection, so there is a certain conflict between this method and the requirement of each spherical crown detection in the relevant standard.

[0006] Therefore, it is necessary to provide a new device for measuring the concave-convex spherical profile to solve the above technical problems. SUMMARY

[0007] The technical problem solved by the present application is to provide a device for measuring the concave-convex spherical profile, which is convenient to use, has high measurement efficiency and high measurement result accuracy.

[0008] In order to solve the above technical problems, the device for measuring the concave-convex spherical surface profile comprises a support base, a mounting plate rotatably mounted on the support base, a plurality of ball heads rotatably mounted in the mounting plate, a plurality of half-sphere blocks fixedly mounted on the ball heads, two half-sphere blocks on each ball head, and a plurality of micrometers fixedly mounted on the ball heads and located between the two half-sphere blocks on the same ball head.

[0009] Preferably, a bearing is fixedly mounted on the support base, and a rotating shaft is fixedly mounted on the mounting plate, and the bearing is fixedly sleeved on the rotating shaft.

[0010] Preferably, a plurality of mounting holes are formed in the mounting plate, and the plurality of ball heads are fixedly mounted in the mounting holes.

[0011] Preferably, a plurality of first fixing bolts are threadedly mounted on the mounting plate, and the plurality of first fixing bolts are in contact with the plurality of ball heads.

[0012] Preferably, a second fixing bolt is fixedly mounted on the two half-sphere blocks on the same ball head.

[0013] Preferably, an anti-skid pad is fixedly mounted on the bottom of the support base.

[0014] Preferably, when the device for measuring the concave-convex spherical surface profile is used to measure the concave-convex spherical surface profile, the following steps are included:

[0015] S: The device for measuring the concave-convex spherical surface profile is placed on the surface of the measured spherical crown, the center of the support base is as close to the center of the workpiece as possible, and the plurality of micrometers are mounted on the mounting plate.

[0016] S: The micrometers are zeroed after being perpendicular to the surface.

[0017] S: The mounting plate is rotated to make the plurality of micrometers stay at different positions to collect a plurality of data.

[0018] S: According to the properties of the surface profile, the average value of the plurality of collected data is calculated, and the data with the largest difference from the average value is found to calculate the profile.

[0019] Compared with the related art, the device for measuring the concave-convex spherical surface profile has the following beneficial effects:

[0020] The present application provides a device for measuring the profile of concave-convex spherical surface, the accuracy and rationality of the measuring result is far greater than the profile gauge; the measuring points are uniformly distributed, the evaluation range of the profile is more comprehensive, the accuracy of the result is not affected by the workpiece with poor profile, and the shortcomings of the profile measuring device are completely overcome; the measuring capacity is weaker than the three-coordinate measuring machine, but the device can be directly placed on the workpiece, and the measuring efficiency is far greater than that of the three-coordinate measuring machine; the device is a product combining the measuring efficiency, accuracy and rationality of the spherical crown profile; the profile of concave spherical surface can be measured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface;

[0022] Figure 2 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface; Figure 1 The device for measuring the profile of concave-convex spherical surface provided by the present application is an enlarged structure diagram of the A part; The device for measuring the profile of concave-convex spherical surface provided by the present application is an enlarged structure diagram of the A part;

[0023] The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; Figure 3 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; Figure 1 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed;

[0024] The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; Figure 4 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; Figure 2 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed;

[0025] The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave-convex spherical surface. Figure 5 In the figure, 1 is a support seat, 2 is a mounting plate, 3 is a ball head, 4 is a half-spherical block, 5 is a micrometer, 6 is a first fixing bolt, and 7 is a second fixing bolt.

[0026] DETAILED DESCRIPTION

[0027] The present application will be further described below in combination with the drawings and embodiments.

[0028] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , among which, Figure 1 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface; Figure 2 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface; Figure 1 The device for measuring the profile of concave-convex spherical surface provided by the present application is an enlarged structure diagram of the A part; Figure 3 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; Figure 1 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; Figure 4 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; Figure 2 The device for measuring the profile of concave-convex spherical surface provided by the present application is a structure diagram of the measuring concave spherical surface after the micrometer is removed; Figure 5The structural schematic diagram of the convex spherical surface of the device for measuring the profile of concave-convex spherical surface is provided. The device for measuring the profile of concave-convex spherical surface comprises a support base 1, which can be a magnet, capable of conveniently fixing the support base 1 on the workpiece to be measured; a mounting plate 2 rotatably mounted on the support base 1; a plurality of ball heads 3 uniformly rotatably mounted in the mounting plate 2; and a plurality of half-spherical blocks 4 fixedly mounted on the ball heads 3, wherein the number of the half-spherical blocks 4 on each ball head 3 is two, as shown in Figures 1-4 In this embodiment, the mounting plate 2 is arc-shaped, and the half-spherical blocks 4 are located on the outer surface of the mounting plate 2, used for measuring the profile of concave spherical surface. In other embodiments, the half-spherical blocks 4 can be mounted on the inner surface of the mounting plate 2, used for measuring the profile of convex spherical surface; a plurality of micrometers 5 are mounted on the ball heads 3, and the micrometers 5 are located between the two half-spherical blocks 4 on the same ball head 3, wherein a circular hole is formed in the ball head 3, and a half-circular hole with an open side is formed in the half-spherical block 4, and the micrometer 5 penetrates through the circular hole and the half-spherical hole.

[0029] A bearing is fixedly mounted on the support base 1, and a rotating shaft is fixedly mounted on the mounting plate 2, and the bearing is fixedly sleeved on the rotating shaft, so as to realize the rotary connection between the mounting plate 2 and the support base 1, and conveniently measure more values of the same dimension of the workpiece by the micrometer 5.

[0030] A plurality of mounting holes are formed in the mounting plate 2, and the ball heads 3 are fixedly mounted in the mounting holes.

[0031] A plurality of first fixing bolts 6 are threadedly mounted on the mounting plate 2, and the first fixing bolts 6 are in contact with the ball heads 3, so as to conveniently position the ball heads 3, and thereby conveniently adjust the micrometer 5 to be perpendicular to the surface of the measured workpiece.

[0032] A second fixing bolt 7 is fixedly mounted on the two half-spherical blocks 4 on the same ball head 3, so as to quickly and conveniently fix the micrometer 5 on the ball head 3, thereby ensuring that the micrometer 5 is always in the initial position when the mounting plate 2 rotates on the support base 1, and thereby ensuring the measurement accuracy.

[0033] An anti-skid pad is fixedly mounted on the bottom of the support base 1.

[0034] The device for measuring the profile of concave-convex spherical surface comprises the following steps when measuring the profile of concave-convex spherical surface:

[0035] S1: the device for measuring the concave-convex spherical surface profile is placed on the surface of the measured spherical cap, the center part of the support base 1 is as far as possible in the center of the workpiece, and then a plurality of micrometers 5 are installed on the installation plate 2;

[0036] S2: the micrometers 5 are zeroed after being perpendicular to the surface;

[0037] S3: the installation plate 2 is rotated to make the plurality of micrometers 5 stay in different positions to collect a plurality of data;

[0038] S4: according to the property of the surface profile, the average value of the plurality of collected data is first calculated, and then the data deviating the most from the average value is found out to calculate the profile.

[0039] According to the characteristics of the spherical shape determined by at least 4 points, by using the characteristics that the vertical surface of the sphere points to the sphere center at any position, the average value of the plurality of data collected by the micrometers on the surface of the sphere is taken as the'reference', and then the difference deviating the most from the reference is found out.

[0040] The focus points of the pointers of the 6 micrometers 5 are the sphere center of the spherical cap workpiece, and the sphere center position does not change no matter how the workpiece is rotated;

[0041] Since the sphere center is fixed, the data change of the micrometers 5 is the change of the radius of the workpiece;

[0042] Since the distance of the workpiece to the micrometers 5 is fixed, after rotation, the measured points are all at the fixed latitude. The measured points can form 3 latitudes;

[0043] Since the workpiece itself is a line, the measured points of the 6 micrometers 5 are on the same meridian;

[0044] As described above, during the rotation of the workpiece, the measured points describe 3 latitudes and a plurality of meridians, the measurement is uniformly distributed, and the measurement result is more comprehensive.

[0045] Compared with the related art, the device for measuring the concave-convex spherical surface profile has the following beneficial effects:

[0046] The device for measuring the concave-convex spherical surface profile has the following beneficial effects:

[0047] The above merely illustrates the embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, which is made according to the content of the present application, shall be included in the patent protection scope of the present application.

Claims

1. A device for measuring the contour of a concave-convex spherical surface, characterized in that: include: Support seat; A mounting plate, the mounting plate being rotatably mounted on the support seat; A plurality of ball heads are evenly rotatably mounted in the mounting plate; A plurality of hemispherical blocks, each of which is fixedly mounted on the ball head, and each ball head has two hemispherical blocks; A plurality of micrometers are respectively mounted on a plurality of ball heads, and the micrometers are located between the two hemispherical blocks on the same ball head.

2. The device for measuring the concave-convex spherical profile according to claim 1, characterized in that: A bearing is fixedly mounted on the support seat, a rotating shaft is fixedly mounted on the mounting plate, and the bearing is fixedly sleeved on the rotating shaft.

3. The device for measuring the concave-convex spherical profile according to claim 1, characterized in that: The mounting plate is provided with a plurality of mounting holes, and the plurality of ball heads are fixedly mounted in the plurality of mounting holes respectively.

4. The device for measuring the concave-convex spherical profile according to claim 3, characterized in that: A plurality of first fixing bolts are threadedly mounted on the mounting plate, and the plurality of first fixing bolts are in contact with the plurality of ball heads respectively.

5. The device for measuring the concave-convex spherical profile according to claim 1, characterized in that: The two hemispherical blocks located on the same ball head are fixedly mounted with a same second fixing bolt.

6. The device for measuring the concave-convex spherical profile according to claim 1, characterized in that: An anti-slip pad is fixedly installed on the bottom of the support seat.

7. The device for measuring the concave-convex spherical profile according to claim 1, characterized in that: When the device for measuring the concave-convex spherical surface profile measures the concave-convex spherical surface profile, the device specifically includes the following steps: S1: Place the device for measuring the concave and convex spherical surface profile on the surface of the spherical crown to be measured, so that the center of the support seat is as close as possible to the center of the workpiece, and then install multiple micrometers on the mounting plate; S2: Make the dial indicator perpendicular to the surface and then reset to zero; S3: Rotate the mounting plate to allow multiple dial indicators to stop at different positions to collect multiple data; S4: According to the properties of the surface profile, first calculate the average value of multiple collected data, then find the data with the largest difference from the average value, and use this to calculate the profile.

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