CN223258811U - Detection device for improving object inner diameter measurement accuracy - Google Patents

Abstract

The utility model discloses a detection device for improving the accuracy of measuring the inner diameter of an object, which comprises an inner micrometer, wherein a fixing screw hole is formed in the body of the inner micrometer, the fixing screw hole is matched with a fixing bolt, the other end of the fixing bolt is connected with a horizontal angle measuring device, and the horizontal angle measuring device is detachably arranged on the inner micrometer through the fixing bolt and the fixing screw hole. The horizontal angle measuring device is used for positioning the measuring datum point based on the traditional inside micrometer, so that the angle datum of the horizontal angle measuring device when the horizontal angle measuring device positions the measured workpiece is kept consistent in the process of multiple measurement, the problem of measurement errors caused by human factors is avoided, the purpose of improving the measurement accuracy is achieved, the position of the horizontal angle measuring device can be flexibly adjusted according to the placement position of the measured object, the position of the horizontal angle measuring device is optimal, and the accuracy and reliability of measurement data are guaranteed.

Description

Detection device for improving object inner diameter measurement accuracy

Technical Field

The utility model belongs to the technical field of inner diameter measurement, and particularly relates to a detection device for improving the accuracy of inner diameter measurement of an object.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Currently, the most common measuring tool used for measuring the inner diameter of a workpiece is an inner micrometer. In daily production, when the hole is measured by using an inner diameter ruler, the measuring surface of a measuring contact is supported on the surface to be measured, and the micro-cylinder is adjusted to enable the measuring surface on one side of the micro-cylinder to swing in the radial section of the hole, so that the minimum size is found. The screw is then tightened to remove and read, and there is also a direct reading without tightening the screw. This presents a problem for attitude measurement. Attitude measurement, namely the consistency between the measurement time and the use time. For example, when the inner diameter of 75-600/0.01 mm is measured, the extension rod is connected with the micrometer head, and the size is larger than 125 mm. The difference of the reading value between the tightening and non-tightening of the fixing screw is 0.008mm, which is the attitude measurement error.

The support position is correct when the inside micrometer measures. The extended large-size inner diameter ruler is deformed by gravity and relates to shape and position errors such as straightness, parallelism and perpendicularity. The rigidity of the material can be reflected on 'natural deflection'. Theoretical and experimental results show that the rigidity determined by the cross-sectional shape of the workpiece has a great influence on the gravity deformation after supporting. If the inner diameter gauges with different cross-sectional shapes have the same length L, the measured value error of the inner diameter gauge can meet the requirement when the inner diameter gauge is supported at (2/9) L. However, the support points are slightly different, and the straightness change value is larger. The straightness change value when the support position is moved to the position of the maximum support distance is called "natural deflection" in the national standard. In order to ensure rigidity, the relevant standards specify that the bearing point of the inner diameter ruler is at (2/9) L and at 200mm from the end face, i.e. the variation is minimal during measurement. And the error of the indication value of the inner ruler is not more than the requirement when the inner ruler is detected every 90 degrees, but because the individual senses of the measured people have differences, the same workpiece is difficult to measure the same point, and the result may have larger error.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art, and provides a detection device for improving the measurement accuracy of the inner diameter of an object, wherein a horizontal angle measurement device is used for positioning a measurement datum point, so that the angle datum point is kept consistent when the horizontal angle measurement device is used for positioning a measured workpiece in the process of multiple measurement, the influence on a measurement result caused by objective factors such as measurement habit, visual inspection, sense organ and the like among different individuals is eliminated, the problem of measurement errors caused by human factors is avoided, and the purpose of improving the measurement accuracy is achieved.

In order to achieve the above object, the present utility model is realized by the following technical scheme:

The technical scheme provides a detection device for improving the accuracy of measuring the inner diameter of an object, which comprises an inner micrometer, wherein a fixing screw hole is formed in a micrometer body of the inner micrometer, the fixing screw hole is matched with a fixing bolt, the other end of the fixing bolt is connected with a horizontal angle measuring device, the horizontal angle measuring device is detachably arranged on the inner micrometer through the fixing bolt and the fixing screw hole, and the horizontal angle measuring device is rotationally connected with the fixing bolt.

In at least one embodiment, the fixing bolt is a ball stud.

In at least one embodiment, the back of the horizontal angle measuring device is fixedly provided with a ball seat.

In at least one embodiment, the ball seat has an aperture that is compatible with the ball of the ball stud, and the horizontal angle measuring device is rotatably connected with the ball stud by the ball seat being mated with the ball.

In at least one embodiment, threads are arranged in the fixing screw hole and are in threaded connection with the fixing bolt.

In at least one embodiment, the inner surface of the fixing screw hole is smooth and is inserted into the fixing bolt.

In at least one embodiment, the inside micrometer further comprises an extension bar, and the extension bar is detachably mounted to the inside micrometer.

In at least one embodiment, the extension bar is provided with a fixing screw hole, the fixing screw hole is matched with the fixing bolt, and the horizontal angle measuring device is detachably arranged on the extension bar.

In at least one embodiment, the horizontal angle measurement device is mounted on the extension bar when the inside micrometer is in use in connection with the extension bar.

In at least one embodiment, the horizontal angle measuring device is a micro level.

The technical scheme of the utility model has the following beneficial effects:

1) The detection device for improving the accuracy of the inner diameter measurement of the object is based on the traditional inner diameter micrometer, the external miniature 90-degree rotatable horizontal angle measurement device is detachably connected with the inner diameter micrometer body and each extension rod through the tapping threading, and the horizontal angle measurement device is used for positioning the measurement datum point, so that the angle datum of the horizontal angle measurement device when positioning a measured workpiece is consistent in the multiple measurement process, the influence of objective factors such as measurement habit, visual inspection and sense feeling among different individuals on the measurement result is eliminated, the problem of measurement error caused by human factors is avoided, the aim of improving the measurement accuracy is fulfilled, the position of the horizontal angle measurement device can be flexibly adjusted according to the placement position (horizontal, non-horizontal and vertical) of the measured object, the position of the horizontal angle measurement device is optimal, and the accuracy and reliability of measurement data are ensured.

2) The detection device ruler for improving the accuracy of measuring the inner diameter of the object can solve the problem of positioning the datum point before measuring the workpiece, and the effect of improving the accuracy of measuring the same workpiece under various different environments is achieved by unifying the datum point before measuring.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram showing the structure of a detection device for improving the accuracy of measuring the inner diameter of an object in combination;

FIG. 2 is a schematic diagram of a detection device for improving the accuracy of measuring the inner diameter of an object according to the present utility model.

In the figure, 1, an inside micrometer, 2, an extension bar, 3, a fixed screw hole, 4, a horizontal angle measuring device, 5, a fixed bolt, 6, a ball seat, 7, an extension bar connecting seat and 8, an extension bar connecting screw thread.

The mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms also are intended to include the plural forms unless the present utility model clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

For convenience of description, the words "upper", "lower", "left" and "right" in the present utility model, if they mean only the directions of upper, lower, left and right in correspondence with the drawings themselves, are not limiting in structure, but merely serve to facilitate description of the present utility model and simplify description, rather than to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "mounted," "connected," "secured," and the like in this disclosure are to be construed broadly, and they may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, internally connected, or the interaction of two elements, as will be apparent to those of ordinary skill in the art, in view of the detailed description of the disclosure.

Example 1

As shown in FIG. 1, the embodiment discloses a detection device for improving the accuracy of measuring the inner diameter of an object, which comprises an inner micrometer 1, wherein a fixing screw hole 3 is formed in the body of the inner micrometer 1, the fixing screw hole 3 is matched with a fixing bolt 5, the other end of the fixing bolt 5 is connected with a horizontal angle measuring device 4, the horizontal angle measuring device 4 is detachably arranged on the inner micrometer 1 through the fixing bolt 5 and the fixing screw hole 3, the angle of a measured workpiece measuring point is positioned through the horizontal angle measuring device 4, and after the positioning is carried out, the reading is carried out through adjusting the inner micrometer 1. The display angle of the horizontal angle measuring device 4 is kept unchanged in the adjustment process of the inside micrometer 1, when the workpiece is restored, the angle of the measured workpiece is continuously positioned through the horizontal angle measuring device 4 under the condition that the workpiece does not move, the adjustment of the adjustment knob of the inside micrometer 1 after the angle of the measuring point is consistent with the angle of the previous measurement is ensured, and the reading is performed again after the adjustment is finished. The measuring datum point is positioned by the horizontal angle measuring device 4, so that the angle datum when the horizontal angle measuring device 4 positions the measured workpiece is kept consistent in the process of multiple measurement, the influence on the measuring result caused by objective factors such as measuring habit, visual inspection, sense organ and the like among different individuals is eliminated, the problem of measuring errors caused by human factors is avoided, and the purpose of improving the measuring accuracy is achieved.

The horizontal angle measuring device 4 is rotationally connected with the fixing bolt 5, and the position of the horizontal angle measuring device 4 can be flexibly adjusted according to the placement position of the measured object, so that the position of the horizontal angle measuring device 4 is optimal, and the accuracy and reliability of measured data are ensured.

In this embodiment, the horizontal angle measuring device 4 is a micro level bar, which ensures the miniaturization of the device while ensuring the measurement of the horizontal angle, and avoids the measurement accuracy of the inside micrometer 1 from being affected by the oversized shape of the horizontal angle measuring device 4.

In this embodiment, the fixing bolt 5 is a ball stud, the back of the horizontal angle measuring device 4 is fixedly provided with a ball seat 6, the ball seat 6 has an aperture adapted to the ball of the ball stud, and the horizontal angle measuring device 4 is rotationally connected with the ball stud by matching the ball seat 6 with the ball, so as to flexibly adjust the position of the horizontal angle measuring device 4 according to the placement position of the object to be measured.

In this embodiment, the type of the ball stud is not limited, and the ball stud may be an integral ball stud, and the ball stud is fixedly connected with the screw, or a split ball stud, and the ball stud and the screw are connected by screwing or plugging.

In this embodiment, threads may be provided in the fixing screw hole 3, and the inner surface may also be kept smooth, only by ensuring that the fixing screw hole 3 and the fixing bolt 5 remain fastened when connected. When the screw thread is arranged in the fixing screw hole 3, the fixing screw hole is in threaded connection with the fixing bolt 5, and when the inner surface of the fixing screw hole 3 is smooth, the fixing bolt 5 is inserted.

In this embodiment, the inside micrometer 1 further includes an extension bar 2, and the extension bar 2 is detachably mounted on the inside micrometer 1. Specifically, an extension bar connecting seat 7 is arranged at the position, close to the head end, of the inner diameter micrometer 1, and an extension bar connecting thread 8 is arranged at one end of the extension bar 2, so that the extension bar 2 and the inner diameter micrometer 1 can be disassembled through the cooperation of the extension bar connecting thread 8 and the extension bar connecting seat 7.

In this embodiment, the extension bar 2 is provided with a fixing screw hole 3, and the fixing screw hole 3 can be matched with a fixing screw rod connected with the horizontal angle measuring device 4 to detachably mount the horizontal angle measuring device 4 on the extension bar 2.

In this embodiment, the fixing screw hole 3 of the blade of the inside micrometer 1 is located at the middle position of the blade of the inside micrometer 1, and the fixing screw hole 3 on the extension bar 2 is located at the middle position of the extension bar 2. When the inside micrometer 1 is used for measurement, the horizontal angle measuring device 4 is arranged on the fixed screw hole 3 of the micrometer body, and when the inside micrometer 1 is connected with the extension bar 2 for measurement, the horizontal angle measuring device 4 is arranged on the extension bar 2. In this way, it is ensured that the installation position of the horizontal angle measurement device 4 follows the general principle of "centered installation", i.e. that the installation position of the horizontal angle measurement device 4 is ensured in a position of the gauge close to the middle before the measured object is measured.

In this embodiment, a use process of a detection device for improving accuracy of measuring an inner diameter of an object is as follows:

S1, taking the inside micrometer 1 out of the protection box, estimating the inside diameter value of a measured object, selecting a proper extension bar 2 for assembly, selecting the proper extension bar 2 and installing the proper extension bar 2 on the inside micrometer 1 if the estimated inside diameter value exceeds the measuring range of the inside micrometer 1 body, and measuring by using the inside micrometer 1 body if the estimated inside diameter value is within the measuring range of the inside micrometer 1 body. Before measurement, the inside micrometer 1 is zeroed, the baseline position is ensured to be accurate, and the standard gauge block is used for checking the baseline position.

S2, taking out the angle-adjustable horizontal angle measuring device 4 from the protection box by the calibrated inside micrometer 1, assembling the angle-adjustable horizontal angle measuring device 4 on the inside micrometer 1 through the fixing screw hole 3 and the fixing bolt 5, and fastening the angle-adjustable horizontal angle measuring device 4 on the inside micrometer 1 if only the inside micrometer 1 body is used for measurement, and mounting the angle-adjustable horizontal angle measuring device 4 on the extension bar 2 if the extension bar 2 is connected for measurement.

S3, when the measured object is measured, if the measured object is placed at the horizontal position, the horizontal angle measuring device 4 with the adjustable angle is adjusted to the horizontal position when the inside micrometer 1 is placed, the bubble on the level is observed to read when the middle graduation is performed, the level is firstly adjusted to the horizontal position in the subsequent measurement, the bubble on the level is observed to read when the middle graduation is performed, and therefore the standard unification of the reading can be guaranteed, and the reading is relatively accurate.

If the measured object is placed in a vertical position, the horizontal angle measuring device 4 with the adjustable angle on the inside micrometer 1 is rotated to a position vertical to the body of the inside micrometer 1, the horizontal angle measuring device 4 is used for determining in the middle position by observing the air bubble of the horizontal micrometer during adjustment, then reading is carried out, and the air bubble of the horizontal micrometer is kept in the middle position during the subsequent multiple measurement, so that accurate and reliable data are ensured.

If the measured object is placed at any position (i.e. not at the horizontal position or the vertical position), the position of the inside micrometer 1 is fixed at first, then the position of the horizontal angle measuring device 4 on the inside micrometer 1 is adjusted, the relative level of the horizontal angle measuring device 4 and the reference horizontal plane is ensured, then the air bubble of the horizontal angle measuring device 4 is ensured to be at the middle position, the reading is performed, and the inside micrometer 1 and the horizontal angle measuring device 4 are adjusted in the following measurement mode, so that the multiple measurement data are ensured to be basically consistent.

The utility model provides a detection device for improving the accuracy of measuring the inner diameter of an object, which is based on the existing traditional inner diameter micrometer, an external miniature 90-degree rotatable horizontal angle measuring device is detachably connected with an inner diameter micrometer body and each extension rod through tapping threading, and the problems of measuring levelness and verticality of the inner diameter micrometer are solved by adjusting the inner diameter micrometer body and observing the angle scale value of the external horizontal angle measuring device when a workpiece is measured, so that the angle of the workpiece during measurement is unified, and the problem of larger measurement result error caused by measuring the reference position deviation of the same workpiece in different environments and different individuals is avoided. The horizontal angle measuring device can be adjusted to a horizontal position when the workpiece is horizontally placed for measuring the workpiece, the measuring angle can be positioned and recorded by observing the inclined scale value of the horizontal angle measuring device when the workpiece is not horizontally prevented, a reference is provided for the next unified angle measurement, the horizontal angle measuring device can be rotated to a position perpendicular to the inside micrometer when the workpiece is vertically placed for measurement, the measuring reference point is positioned, and finally the repeated measurement is achieved, so that the problem of human measurement errors caused by measurement of different individuals in the inside micrometer measurement data is avoided.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A detection device for improving the accuracy of measuring the inner diameter of an object is characterized by comprising an inner micrometer, wherein a fixing screw hole is formed in a micrometer body of the inner micrometer, the fixing screw hole is matched with a fixing bolt, the other end of the fixing bolt is connected with a horizontal angle measuring device, the horizontal angle measuring device is detachably arranged on the inner micrometer through the fixing bolt and the fixing screw hole, and the horizontal angle measuring device is rotationally connected with the fixing bolt.

2. The detecting device for improving the accuracy of measuring the inner diameter of an object according to claim 1, the fixing bolt is characterized by being a ball stud.

3. The detecting device for improving the accuracy of measuring the inner diameter of an object according to claim 2, wherein the rear surface of the horizontal angle measuring device is fixedly provided with a ball seat.

4. A device for improving accuracy of measuring an inner diameter of an object according to claim 3, wherein the ball socket has an aperture adapted to a ball of the ball stud, and the horizontal angle measuring device is rotatably connected to the ball stud by the ball socket being engaged with the ball.

5. The detecting device for improving the accuracy of measuring the inner diameter of an object according to claim 1, wherein the fixing screw hole is internally provided with threads which are screwed with the fixing bolt.

6. The detecting device for improving the accuracy of measuring the inner diameter of an object according to claim 1, wherein the inner surface of the fixing screw hole is smooth and is inserted into the fixing bolt.

7. The detecting device for improving the accuracy of measuring the inner diameter of an object according to claim 6, the inside micrometer is characterized by further comprising an extension bar; the extension bar is detachably arranged on the inside micrometer.

8. The device for detecting the inside diameter of an object with improved accuracy according to claim 7, wherein the extension bar is provided with a fixing screw hole, the fixing screw hole is matched with the fixing bolt, and the horizontal angle measuring device is detachably arranged on the extension bar.

9. The apparatus of claim 8, wherein the horizontal angle measuring device is mounted on the extension bar when the inside micrometer is connected to the extension bar for use.

10. The apparatus of claim 1, wherein the horizontal angle measuring device is a micro level.