CN211346688U - Calibrating device of optical axis measuring instrument - Google Patents

Abstract

The utility model discloses a calibrating device of optical axis class measuring apparatu, including calibration main part and handle, the calibration main part has relative first terminal surface and second terminal surface, is equipped with a plurality of standard cylinder portions between first terminal surface and the second terminal surface, and the axle diameter of a plurality of standard cylinder portions increases from the first terminal surface to the second terminal surface gradually, and the calibration main part has the central axis, and standard cylinder portion is along central axis rotational symmetry; the central axis of the handle coincides with the central axis of the calibration main body, the handle is provided with a third end surface and a fourth end surface which are opposite, and the third end surface is connected with the second end surface. The utility model discloses a calibrating device commonality of optics axle class measuring apparatu is strong, and the measuring accuracy is high.

Description

Calibrating device of optical axis measuring instrument

Technical Field

The utility model relates to a calibration field of optics axle class measuring apparatu especially relates to a calibrating device of optics axle class measuring apparatu.

Background

The optical shaft measuring instrument is a multi-parameter optical dimension measuring device for rapidly and synchronously measuring the dimensions of the shaft diameter and the shaft distance, is widely applied to advanced manufacturing enterprises such as engines, gearboxes, medical instruments and the like, and is used for rapidly measuring rotary shaft parts in batches. The Device is a non-contact measurement system, a high-resolution CCD (Charge Coupled Device) sensor is adopted, after a measured rotary shaft part is propped by two thimbles, the outline of the measured rotary shaft part is scanned, the sensor can act according to a photosensitive rule to quickly detect slight changes of a pixel level, measurement data are obtained through self-contained software analysis, and static measurement and dynamic measurement can be realized. The equipment on the market at present mainly collects sample information by two modes of moving a light source and a CCD (charge coupled device) or moving a measuring workbench up and down. The key technical index when calibrating the optical axis measuring instrument is the measuring accuracy of the axial and radial dimensions. To ensure the accuracy and precision of the measurements while the measurement table is moving, the weight of the standard is also an important reference factor for accuracy.

At present, no corresponding calibration standard exists in China, and the purchased optical shaft measuring instrument cannot be traced due to the loss of a standard device. Manufacturers of all optical axis measuring instruments design a standard device only suitable for the instrument of the manufacturers according to the characteristics of the brand instruments, the market applicability is not large, the measured data cannot be compared transversely, and the high requirement of the industry on the calibration work of the optical axis measuring instruments for rapid development cannot be met; and the measuring accuracy is easily influenced when the standard device contacts the standard device body when an operator takes and installs the standard device for a plurality of times for a long time. Therefore, it is a necessary trend of the calibration development of the optical axis measuring instrument at present to design a calibration device suitable for most optical axis measuring instruments in the market.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a calibrating device of optics axle class measuring apparatu, the calibration of solving current optics axle class measuring apparatu does not have the calibrating device of unified standard, calibrating device's market suitability is low, the approach of tracing to the source is not unified, the incomparable technical problem of measuring result.

In order to solve the technical problem, the utility model provides a calibrating device of optical axis class measuring apparatu, including the calibration main part, the calibration main part has relative first terminal surface and second terminal surface, be equipped with a plurality of standard cylinder portions between first terminal surface and the second terminal surface, a plurality of the axle diameter of standard cylinder portion increases gradually from the first terminal surface to the second terminal surface, the calibration main part has the central axis, standard cylinder portion along the central axis rotational symmetry; and the central axis of the handle coincides with the central axis of the calibration main body, the handle is provided with a third end surface and a fourth end surface which are opposite, and the third end surface is connected with the second end surface.

Furthermore, a first tip hole and a second tip hole which are opposite to each other are further arranged on the calibration device of the optical shaft measuring instrument, the first tip hole is arranged on the first end face, and the second tip hole is arranged on the fourth end face.

Further, the first center hole and the second center hole are respectively matched with two centers of the optical axis measuring instrument, and the aperture of the first center hole and the aperture of the second center hole are not smaller than the diameters of the centers.

Further, the handle is rotationally symmetrical along the central axis, and the diameter of the handle is smaller than the maximum shaft diameter of the standard cylindrical part on the calibration body.

Further, all the standard cylindrical portions have an axial diameter ranging from 2mm to 350 mm.

Further, the difference in the shaft diameter between any two adjacent standard cylindrical portions is 2mm to 30 mm.

Further, the step heights of all the standard cylindrical portions are the same.

Further, the cylindricity of the outer circular surfaces of all the standard cylindrical parts is not more than 0.4 μm.

Further, the calibration device of the optical axis measuring instrument is made of steel materials or titanium materials, and the mass of the calibration device of the optical axis measuring instrument is not more than 4 kg.

Adopt above-mentioned technical scheme, calibrating device of optics axle type measuring apparatu have the handle, can remove the calibrating device of optics axle type measuring apparatu through the handle, influence the measuring accuracy of calibrating device of optics axle type measuring apparatu behind can avoiding operator's hand or other instrument direct contact calibration main parts, improved the measuring accuracy of calibrating device of optics axle type measuring apparatu. Meanwhile, the calibration main body is provided with a plurality of standard cylindrical parts, so that the calibration main body can be used for calibrating various optical shaft measuring instruments, and the application is wider.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a calibration device of an optical axis measuring instrument according to the present invention;

fig. 2 is a schematic view of the calibration of the optical axis measuring instrument of the present invention;

fig. 3 is a schematic structural diagram of a second calibration device of the present invention;

fig. 4 is a schematic structural diagram of a third calibration device of the present invention;

wherein the reference numerals in the figures correspond to:

100-calibration device of optical axis measuring instrument, 11-calibration main body, 110-central axis, 111-first end face, 112-second end face, 113-first tip hole, 114-standard cylindrical part;

12-handle, 121-third end face, 122-fourth end face, 123-second apical pore;

200-a second calibration means, 201-a fifth end face, 202-a sixth end face, 203-a second measurement plane, 21-a second calibration body, 210 a second central axis, 213-a third tip hole, 214-a fourth tip hole;

300-third alignment means, 301-seventh end face, 302-eighth end face, 310-third central axis, 313-fifth apex hole, 314-sixth apex hole;

400-optical axis measuring instrument.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Reference herein to "one embodiment," "some embodiments," or "embodiments" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "top", "bottom", "front", "back", and the like refer to orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplification of the description, but do not indicate or imply that the system or component in question must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

The present invention will be further described with reference to the accompanying drawings and examples.

Referring to fig. 1-2, the present invention discloses a calibration apparatus 100 for an optical axis measuring instrument, which is used for calibrating an optical axis measuring instrument 400. The calibration device 100 of the optical axis measuring instrument includes a calibration body 11 and a handle 12. The calibration body 11 has a central axis 110 and opposite first and second end faces 111, 112. A plurality of standard cylindrical portions 114 are provided between the first end surface 111 and the second end surface 112, the standard cylindrical portions 114 being rotationally symmetric along the central axis 110. The axial diameter of the standard cylindrical portion 114 gradually increases from the first end face 111 toward the second end face 112. The central axis of the handle 12 coincides with the central axis 110 of the calibration body 11. The handle 12 has a third end surface 121 and a fourth end surface 122 opposite to each other, and the third end surface 121 is connected to the second end surface 112 of the calibration body 11. The handle 12 is a part of the calibration apparatus 100 used for operations such as clamping, and may be an operation handle or other parts used for operations, which are not listed here. In some embodiments of the present invention, as shown in fig. 1, a first tip hole 113 and a second tip hole 123 are further disposed on the calibration device 100 of the optical axis measuring instrument, the first tip hole 113 is disposed on the first end surface 111 of the calibration main body 11, and the second tip hole 123 is disposed on the fourth end surface 122 of the handle 12. When the optical axis measuring instrument 400 is installed, the first center hole 113 and the second center hole 123 are respectively matched with two centers on the base of the optical axis measuring instrument 400, and the aperture of the first center hole 113 and the aperture of the second center hole 123 are not smaller than the diameter of the center on the base of the optical axis measuring instrument 400. The aperture of the first tip hole 113 and the aperture of the second tip hole 123 may be the same or different, as long as the requirement of completing the installation by matching with the two tips on the base of the optical axis measuring instrument 400 is met, and no other limitation is made herein.

In some embodiments of the present invention, the standard cylindrical portion 114 gradually increasing from the first end surface 111 to the second end surface 112 has the same step height, and the step height of the standard cylindrical portion 114 is 5mm to 6 mm. The shaft diameter of the standard cylindrical portion 114 is between 2mm and 350mm, and the difference in shaft diameter between any two adjacent standard cylindrical portions 114 is between 2mm and 30 mm.

In some embodiments of the present invention, the handle 12 is rotationally symmetric about the central axis 110, and the diameter of the handle 12 is less than the maximum axial diameter of the standard cylindrical portion 114 of the calibration body 11. The handle 12 is a taking and placing contact part of the calibration device 100 of the optical axis measuring instrument, so that the calibration precision of the calibration device 100 of the optical axis measuring instrument is prevented from being affected by the direct contact between the calibration main body 11 of the calibration device 100 of the optical axis measuring instrument and a clamping tool of an operator.

To ensure the measurement accuracy and precision of the optical axis measuring instrument 400 during movement, the weight of the calibration device 100 of the optical axis measuring instrument is also an important reference factor for the accuracy. The utility model discloses an optical axis class measuring apparatu's calibrating device 100 preferably adopts steel material or titanium material to make, and the quality of the calibrating device 100 of single optical axis class measuring apparatu is not more than 4 kg. The steel material can be one or more of alloy structural steel, bearing steel, tool and die steel, carbon tool steel and special manganese steel, and the titanium material can be one of metal titanium material or titanium alloy.

The cylindricity is the difference between the maximum dimension and the minimum dimension of any vertical section, and in the calibrating device 100 of the spindle measuring instrument of the present invention, the cylindricity of the outer circular surface of each standard cylindrical part 114 is not more than 0.4 μm, so as to ensure the processing uniformity of the outer circular surface of the standard cylindrical part 114; the diameter size difference of the different axial cross-sections of same standard cylinder portion 114 is less, and the measuring error of different measuring points is selected to same standard cylinder portion 114 when reducing the calibration, and then can guarantee the utility model discloses an accuracy of calibration measurement result is calibrated to calibrating device 100 of optics axle class measuring apparatu.

Referring to fig. 1-4, when calibrating the axle diameter measurement accuracy of the optical axis measuring instrument, the calibration device 100 of the optical axis measuring instrument is placed on the base of the optical axis measuring instrument 400, the first center hole 113 and the second center hole 123 at two ends of the calibration device 100 of the optical axis measuring instrument are respectively matched with the two centers on the base of the optical axis measuring instrument 400, and the corresponding axle diameter calibration program of the optical axis measuring instrument 400 is called for calibration. Analyzing and processing the two-dimensional image output by the optical axis measuring instrument to obtain the measuring results of the shaft diameters of different positions of the calibrating device, comparing the measuring results with the nominal value of the calibrating device 100 of the optical axis measuring instrument to obtain corresponding indicating value errors, uncertainty and other parameters, and further completing the rapid calibration of the shaft diameter parameters of the optical axis measuring instrument 400.

The utility model discloses an optics axle class measuring apparatu also can realize the quick calibration of interaxial distance through second calibrating device 200. As shown in fig. 3, the second calibration body 21 of the second calibration device 200 is formed by connecting a plurality of second standard cylindrical portions having different shaft diameters in order along the second central axis 210. The second calibration body 21 is composed of a plurality of second standard cylindrical portions, and the second calibration body 21 includes a cylindrical second standard cylindrical portion (not shown) disposed at a middle position of the second central axis 210 and a plurality of cylindrical second standard cylindrical portions (not shown) symmetrically disposed at both sides of the cylindrical second standard cylindrical portion at the middle position and having gradually reduced axial diameters. The second calibration body 21 has a third tip hole 213 and a fourth tip hole 214 at two ends thereof, and the third tip hole 213 and the fourth tip hole 214 are respectively fitted with two tips of the optical axis measuring instrument 400 and then mounted on the base of the optical axis measuring instrument 400. Both ends of the second calibration body 21 have a fifth end face 201 and a sixth end face 202, and the end face of the second standard cylindrical portion between the fifth end face 201 and the sixth end face 202 is a second measuring plane 203. The fifth end surface 201 is a measurement reference plane, and the sixth end surface 202 is an end measurement plane. The second reference cylindrical portion has an axial diameter ranging from 8mm to 250mm, and the second reference cylindrical portion has an axial diameter difference of 2mm to 30 mm. The step height of each second standard cylindrical portion is the same, and the step height is preferably 20 mm. The distance between the axes of both end faces of the second standard cylindrical portion is in the range of 20mm to 1000 mm. The parallelism between the fifth end surface 201 as the reference plane and each measuring plane is not more than 1 μm, so as to ensure the processing uniformity of each measuring plane and avoid the measuring result error caused by the unevenness of the surface of the measuring plane. The distance from the fifth end surface 201 as the calibration reference plane to each measurement plane 203 and the sixth end surface 202 as the end measurement plane is used to obtain the inter-axis distance parameters of the optical shaft-type measuring instrument 400, and the inter-axis distance measurement result is compared with the nominal value of the second calibration device 200 to obtain the corresponding indicating value error, uncertainty and other parameters, thereby realizing the calibration of the inter-axis distance of the optical shaft-type measuring instrument 400. A second handle (not shown) may also be disposed on the sixth end surface 202 of the second calibration device 200, and the second handle is a pick-and-place contact point of the second calibration device 200, so as to prevent the second calibration body 21 of the second calibration device 200 from directly contacting with a tool of an operator and affecting the calibration accuracy of the second calibration device 200.

When only the single parameter value calibration demand to diameter of axle or interaxial distance to some optics axle class measuring apparatu, the utility model discloses an optics axle class measuring apparatu can realize the quick calibration of diameter of axle and interaxial distance through third calibrating device 300. As shown in fig. 4, the third calibration device 300 is a standard diameter of the optical axis measuring instrument 400 that can calibrate the axis diameter and the axis distance simultaneously. The third calibration body (not labeled) of the third calibration device 300 has a fifth apex hole 313 and a sixth apex hole 314 at two ends, and the fifth apex hole 313 and the sixth apex hole 314 are respectively fitted with two apexes of the optical axis measuring instrument 400 and then mounted on the base of the optical axis measuring instrument 400. A fifth tip hole 313 and a sixth tip hole 314 are provided on the seventh end surface 301 and the eighth end surface 302 of the two end surfaces of the third aligning device 300, respectively. The third calibration body of the third calibration device 300 is a cylinder rotated along the third central axis 310. The third calibration body has a seventh end surface 301 as a reference plane and an eighth end surface 302 as a measurement plane. The cylindricity of the outer circular surface of the third calibration main body is not more than 0.2 mu m so as to ensure the high precision of the calibration shaft diameter; the shaft diameter of the third calibration body ranges from 2mm to 350 mm. The axle diameter parameter calibration of the optical axle measuring instrument 400 is completed by comparing the axle diameter measurement result of the optical axle measuring instrument 400 with the axle diameter nominal value of the third calibration device 300. The parallelism of the seventh end surface 301 and the eighth end surface 302 of the third calibration body is not more than 0.8 μm, so as to ensure the high precision requirement of the calibration shaft distance. According to the single-parameter interaxial distance calibration requirement of the optical axis measuring instrument 400 in the market, the interaxial distance of the two end faces of each third calibration main body ranges from 20mm to 1000 mm. The distance between the seventh end surface 301 as the measurement reference plane and the eighth end surface 302 as the measurement plane is used to obtain the inter-axis distance parameter of the optical shaft-like measuring instrument 400, and the inter-axis distance parameter calibration of the optical shaft-like measuring instrument 400 is completed by comparing the inter-axis distance measurement result of the optical shaft-like measuring instrument 400 with the nominal value of the axle diameter of the third calibration device 300. A third handle (not shown) may also be disposed on the eighth end surface 302 of the third calibration device 300, and the third handle is a place for taking and placing the third calibration device 300, so as to avoid that the third calibration body of the third calibration device 300 directly contacts with the tool of the operator to affect the calibration accuracy of the third calibration device 300.

For the utility model discloses a calibration of optics axle class measuring apparatu uses coordinate measuring machine, cylindricity appearance, length measuring appearance to carry out the definite value to each item parameter of calibrating device 100, second calibrating device 200 and third calibrating device 300 of optics axle class measuring apparatu 400's optics axle class measuring apparatu respectively, through comparing of different measuring equipment measuring results, ensures that the calibration result of each etalon is accurate reliable. And (4) utilizing a coordinate measuring machine to fix the parameters of cylindricity, shaft diameter, shaft spacing, planeness, parallelism and the like of each standard device. And (4) utilizing the cylindricity instrument to fix the values of parameters such as cylindricity, planeness, parallelism and the like of each standard instrument. And (4) utilizing a length measuring instrument to fix the shaft diameter, the shaft distance and other parameters of each standard device. After the measurement results of the multiple devices are compared, the calibrated calibration device is used for calibrating the optical axis measuring instrument 400, so that the measured values are accurate and traceable.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (9)

1. A calibrating device of optical axis type measuring apparatu for calibrating optical axis type measuring apparatu (400), its characterized in that includes:

the calibration body (11) is provided with a first end face (111) and a second end face (112) which are opposite to each other, a plurality of standard cylindrical portions (114) are arranged between the first end face (111) and the second end face (112), the axial diameters of the plurality of standard cylindrical portions (114) gradually increase from the first end face (111) to the second end face (112), the calibration body (11) is provided with a central axis (110), and the standard cylindrical portions are rotationally symmetrical along the central axis (110); and

a handle (12), the axis of handle (12) with the center axis (110) coincidence of calibration main part (11), handle (12) have relative third terminal surface (121) and fourth terminal surface (122), third terminal surface (121) with second terminal surface (112) are connected.

2. The calibration device of an optical axis measuring instrument as claimed in claim 1, wherein the calibration device (100) of the optical axis measuring instrument further has a first tip hole (113) and a second tip hole (123) opposite to each other, the first tip hole (113) is disposed on the first end surface (111), and the second tip hole (123) is disposed on the fourth end surface (122).

3. The calibration device of an optical shaft measuring instrument according to claim 2, wherein the first tip hole (113) and the second tip hole (123) are respectively matched with two tips of the optical shaft measuring instrument (400), and the aperture of the first tip hole (113) and the aperture of the second tip hole (123) are not smaller than the diameter of the tips.

4. Calibration arrangement for optical shaft measuring instruments according to claim 1, characterized in that the handle (12) is rotationally symmetrical along the central axis (110), the diameter of the handle (12) being smaller than the largest axial diameter of the standard cylindrical section (114) on the calibration body (11).

5. Calibration arrangement for optical shaft gauges according to claim 4, characterized in that the shaft diameter of all the standard cylindrical sections (114) ranges from 2mm to 350 mm.

6. The calibration device for optical axis measuring instruments according to claim 5, characterized in that the difference between the diameters of any two adjacent standard cylindrical portions (114) is 2mm to 30 mm.

7. Calibration arrangement for optical shaft measuring instruments according to claim 6, characterized in that the step heights of all the standard cylindrical sections (114) are the same.

8. Calibration arrangement for optical axis measuring instruments according to claim 7, characterized in that the cylindricity of the outer circular surface of all standard cylindrical sections (114) is not more than 0.4 μm.

9. The calibration device of the optical axis measuring instrument as claimed in claim 1, wherein the calibration device (100) of the optical axis measuring instrument is made of steel or titanium, and the mass of the calibration device (100) of the optical axis measuring instrument is not greater than 4 kg.

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