Detection device for improving measurement accuracy of inner diameter of object

Abstract

The utility model discloses a detection device capable of improving the measurement accuracy of the inner diameter of an object, and the device comprises an inner diameter micrometer which is provided with a fixed screw hole on the body of the inner diameter micrometer; the inner diameter micrometer is provided with a fixing screw hole, 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 installed on the inner diameter micrometer through the fixing bolt and the fixing screw hole. On the basis of an existing traditional inside micrometer, a horizontal angle measuring device is used for positioning a measuring datum point, so that the angle datum is kept consistent when the horizontal angle measuring device is used for positioning a measured workpiece in the multiple measuring processes, the problem of measuring errors caused by human factors is avoided, and the purpose of improving the measuring accuracy is achieved. The position of the horizontal angle measuring device can be flexibly adjusted according to the placing position of the measured object, so that the position of the horizontal angle measuring device is optimal, and the measured data is accurate and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of inner diameter measurement, and in particular relates to a detection device for improving the measurement accuracy of the inner diameter of an object. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Currently, the most commonly used measuring instruments for measuring the inside diameter of workpieces are inside micrometers. In daily production, when measuring holes with an inside diameter ruler, the measuring surface of the measuring probe is supported on the surface being measured. The differential cylinder is adjusted so that the measuring surface on one side of the differential cylinder swings within the radial cross-section of the hole to find the minimum dimension. The ruler is then tightened with the fixing screws, removed, and the reading is taken. Sometimes, the reading is taken directly without tightening the screws. This introduces a posture measurement problem. Posture measurement refers to the consistency between measurement and use. For example, when measuring a 75-600 / 0.01mm inside diameter ruler, if the dimension exceeds 125mm after the extension rod is connected to the micrometer head, the reading will differ by 0.008mm when the fixing screws are tightened and not tightened, which is the posture measurement error.

[0004] The support position of the inside micrometer must be correct when measuring. The gravity deformation of the large-sized inside diameter ruler after extension involves form and position errors such as straightness, parallelism, and perpendicularity. The magnitude of its rigidity can be specifically reflected in the "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 support. For example, although the length L of inside diameter rulers of different cross-sectional shapes is the same, when supported at (2 / 9)L, the actual measured value error of the inside diameter ruler can meet the requirements. However, if the support point is slightly different, the change in its straightness value is larger. Therefore, in the national standard, the change in straightness when the support position is moved to the maximum support distance position is called "natural deflection". To ensure rigidity, the relevant standards stipulate that the support point of the inside diameter ruler must be at (2 / 9)L and 200mm from the end face, that is, the change during measurement is minimal. The inner diameter ruler should be tested every 90°, and the indication error should not exceed the requirement. However, due to differences in individual sensory perception of the measuring person, it is difficult to ensure that the same point on the same workpiece is measured, and the result may have a large error. Utility Model Content

[0005] The purpose of the present utility model is to overcome the deficiencies in the above-mentioned prior art and provide a detection device for improving the accuracy of measuring the inner diameter of an object. The horizontal angle measuring device is used to locate the measurement reference point, thereby ensuring that the angle reference when the horizontal angle measuring device locates the measured workpiece remains consistent during multiple measurements, thereby eliminating the influence of objective factors such as measurement habits, visual inspection, and senses between different individuals on the measurement results, avoiding measurement errors caused by human factors, and achieving the purpose of improving measurement accuracy.

[0006] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0007] The technical solution of the present utility model provides a detection device for improving the accuracy of measuring the inner diameter of an object, comprising: an inside diameter micrometer, wherein a fixing screw hole is opened on the ruler body of the inside diameter micrometer; the fixing screw hole cooperates with a fixing bolt, and the other end of the fixing bolt is connected to a horizontal angle measuring device, and the horizontal angle measuring device is detachably mounted on the inside diameter micrometer through the fixing bolt and the fixing screw hole; the horizontal angle measuring device is rotatably connected to the fixing bolt.

[0008] In at least one embodiment, the fixing bolt is a ball stud.

[0009] In at least one embodiment, a ball head seat is fixedly mounted on the back of the horizontal angle measuring device.

[0010] In at least one embodiment, the ball head seat has a hole diameter adapted to the ball head of the ball head bolt, and the horizontal angle measuring device is rotatably connected to the ball head bolt through the cooperation between the ball head seat and the ball head.

[0011] In at least one embodiment, a thread is provided in the fixing screw hole and is threadedly connected to the fixing bolt.

[0012] In at least one embodiment, the inner surface of the fixing screw hole is smooth and is plugged into the fixing bolt.

[0013] In at least one embodiment, the inside micrometer further includes an extension rod; the extension rod is detachably mounted on the inside micrometer.

[0014] In at least one embodiment, a fixing screw hole is opened on the extension rod, and the fixing screw hole cooperates with the fixing bolt to detachably mount the horizontal angle measuring device on the extension rod.

[0015] In at least one embodiment, when the inside micrometer is connected to the extension rod for use, the horizontal angle measuring device is installed on the extension rod.

[0016] In at least one embodiment, the horizontal angle measuring device is a micro level.

[0017] The beneficial effects of the technical solution of the above utility model are as follows:

[0018] 1) The utility model is a detection device for improving the accuracy of measuring the inner diameter of an object. It uses the existing traditional inside micrometer as a basis. By drilling holes and threading on the inside micrometer body and each extension rod, an external miniature 90° rotatable horizontal angle measuring device can be detachably connected. The horizontal angle measuring device is used to locate the measurement reference point, thereby ensuring that the angle reference when the horizontal angle measuring device locates the measured workpiece remains consistent during multiple measurements, thereby eliminating the influence of objective factors such as measurement habits or visual inspection and senses between different individuals on the measurement results, avoiding measurement errors caused by human factors, and achieving the purpose of improving measurement accuracy; the position of the horizontal angle measuring device can be flexibly adjusted according to the placement position of the measured object (horizontal, non-horizontal, vertical), so that the position of the horizontal angle measuring device is optimal, ensuring that the measurement data is accurate and reliable.

[0019] 2) The utility model is a detection device for improving the accuracy of measuring the inner diameter of an object. It can solve the problem of positioning the reference point before measuring the workpiece. By unifying the reference point before measurement, it can achieve the effect of improving the measurement accuracy when measuring the same workpiece in various different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 This is a schematic structural diagram of a detection device for improving the accuracy of measuring the inner diameter of an object in the present invention;

[0022] Figure 2 This is a schematic structural diagram of an unassembled detection device for improving the measurement accuracy of the inner diameter of an object according to the utility model.

[0023] In the figure: 1. Inside micrometer; 2. Extension rod; 3. Fixing screw hole; 4. Horizontal angle measuring device; 5. Fixing bolt; 6. Ball head seat; 7. Extension rod connecting seat; 8. Extension rod connecting thread.

[0024] In order to show the positions of various parts, the distances or sizes between them are exaggerated. The schematic diagram is for reference only. DETAILED DESCRIPTION

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[0027] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0028] Explanation of terms: The terms "install", "connect", "connect", "fix" and so on in this utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection, a direct connection or an indirect connection through an intermediate medium, an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0029] Example 1

[0030] like Figure 1As shown, this embodiment discloses a detection device for improving the accuracy of measuring the inner diameter of an object, comprising: an inside micrometer 1, a fixing screw hole 3 is formed on the body of the inside micrometer 1, the fixing screw hole 3 cooperates with a fixing bolt 5, the other end of the fixing bolt 5 is connected to a horizontal angle measuring device 4, the horizontal angle measuring device 4 is detachably mounted on the inside micrometer 1 through the fixing bolt 5 and the fixing screw hole 3, the horizontal angle measuring device 4 is positioned by the horizontal angle measuring device 4, and after positioning, the reading is taken by adjusting the inside micrometer 1. During the adjustment process of the inside micrometer 1, the angle displayed by the horizontal angle measuring device 4 is kept unchanged. During re-measurement, if the workpiece does not move, the angle of the workpiece to be measured is continued to be positioned by the horizontal angle measuring device 4. After ensuring that the angle of the measuring point is consistent with the previous measurement angle, the adjustment knob of the inside micrometer 1 is adjusted, and the reading is taken again after the adjustment is completed. The horizontal angle measuring device 4 is used to locate the measurement reference point, thereby ensuring that the angle reference of the horizontal angle measuring device 4 when positioning the measured workpiece remains consistent during multiple measurements, thereby eliminating the impact of objective factors such as measurement habits or visual inspection, senses, etc. between different individuals on the measurement results, avoiding measurement errors caused by human factors, and achieving the purpose of improving measurement accuracy.

[0031] The horizontal angle measuring device 4 is rotatably connected to the fixing bolt 5, and the position of the horizontal angle measuring device 4 can be flexibly adjusted according to the placement of the object to be measured, so that the position of the horizontal angle measuring device 4 is optimal, ensuring that the measurement data is accurate and reliable.

[0032] In this embodiment, the horizontal angle measuring device 4 adopts a micro level, which ensures the miniaturization of the device while ensuring the horizontal angle measurement, and avoids the measurement accuracy of the inside micrometer 1 being affected by the excessive size of the horizontal angle measuring device 4.

[0033] In this embodiment, the fixing bolt 5 is a ball head bolt, and a ball head seat 6 is fixedly installed on the back of the horizontal angle measuring device 4. The ball head seat 6 has an aperture adapted to the ball head of the ball head bolt. The ball head seat 6 cooperates with the ball head to rotatably connect the horizontal angle measuring device 4 to the ball head bolt, thereby realizing flexible adjustment of the position of the horizontal angle measuring device 4 according to the placement position of the object to be measured.

[0034] In this embodiment, there is no restriction on the type of ball stud. The ball stud can be an integrated ball stud with the ball head fixedly connected to the screw rod, or a split ball stud with the ball head and the screw rod connected by screwing or plugging.

[0035] In this embodiment, the fixing screw hole 3 can be threaded or have a smooth inner surface. It is sufficient to ensure that the fixing screw hole 3 and the fixing bolt 5 are tightly connected. If the fixing screw hole 3 is threaded, it is threadedly connected to the fixing bolt 5; if the fixing screw hole 3 has a smooth inner surface, the fixing bolt 5 is inserted.

[0036] In this embodiment, the inside micrometer 1 further includes an extension rod 2, which is detachably mounted on the inside micrometer 1. Specifically, an extension rod connector 7 is provided near the top bead at the head end of the inside micrometer 1, and an extension rod connecting thread 8 is provided at one end of the extension rod 2. The extension rod connecting thread 8 cooperates with the extension rod connector 7 to achieve detachability of the extension rod 2 from the inside micrometer 1.

[0037] In this embodiment, a fixing screw hole 3 is opened on the extension rod 2, and the fixing screw hole 3 can cooperate with the fixing screw connected to the horizontal angle measuring device 4 to detachably install the horizontal angle measuring device 4 on the extension rod 2.

[0038] In this embodiment, the fixing screw hole 3 of the inside micrometer 1 is located in the middle of the body, and the fixing screw hole 3 of the extension rod 2 is also located in the middle of the extension rod 2. When measuring with the inside micrometer 1 alone, the horizontal angle measuring device 4 is mounted in the fixing screw hole 3 of the body. When measuring with the inside micrometer 1 connected to the extension rod 2, the horizontal angle measuring device 4 is mounted on the extension rod 2. This ensures that the installation position of the horizontal angle measuring device 4 adheres to the general principle of "centering the measuring tool," that is, before measuring an object, the horizontal angle measuring device 4 is installed near the center of the measuring tool.

[0039] In this embodiment, a detection device for improving the accuracy of measuring the inner diameter of an object is used as follows:

[0040] S1. Remove inside micrometer 1 from its protective case, estimate the inside diameter of the object being measured, and select an appropriate extension rod 2 for assembly. If the estimated inside diameter exceeds the measuring range of the inside micrometer 1, select an appropriate extension rod 2 and attach it to the inside micrometer 1. If the estimated inside diameter is within the measuring range of the inside micrometer 1, use the inside micrometer 1 itself for measurement. Before measurement, zero the inside micrometer 1 to ensure an accurate baseline position, and calibrate it using a standard gauge block.

[0041] S2. After the inside micrometer 1 is calibrated, take out the adjustable horizontal angle measuring device 4 from the protective box, assemble the adjustable horizontal angle measuring device 4 to the inside micrometer 1 through the fixing screw hole 3 and the fixing bolt 5 and tighten it: if only the inside micrometer 1 body is used for measurement, install the adjustable horizontal angle measuring device 4 on the inside micrometer 1 body; if the extension rod 2 is connected for measurement, install the adjustable horizontal angle measuring device 4 on the extension rod 2.

[0042] S3. When measuring the object to be measured, if the object to be measured is placed in a horizontal position, adjust the adjustable horizontal angle measuring device 4 to a horizontal position when placing the inside micrometer 1, and observe that the bubble on the level is at the middle scale before reading. For the subsequent measurements, adjust the level to a horizontal position first, and observe that the bubble on the level is at the middle scale before reading. This ensures that the reading reference is unified and the reading is relatively accurate.

[0043] If the object to be measured is placed in a vertical position, rotate the adjustable horizontal angle measuring device 4 on the inside micrometer 1 to a position perpendicular to the body of the inside micrometer 1. During the adjustment of the horizontal angle measuring device 4, observe the bubble in the spirit level to determine that it is in the middle position, and then take the reading. During subsequent multiple measurements, keep the bubble in the spirit level in the middle position to ensure that the data is accurate and reliable.

[0044] If the object to be measured is placed in any position (i.e., neither horizontal nor vertical), first fix the approximate measuring position of the inside micrometer 1, then adjust the position of the horizontal angle measuring device 4 on the inside micrometer 1 to ensure that the horizontal angle measuring device 4 is relatively level with the reference horizontal plane, then ensure that the bubble of the horizontal angle measuring device 4 is in the middle position, and then take the reading. For subsequent measurements, adjust the inside micrometer 1 and the horizontal angle measuring device 4 as above to ensure that the data of multiple measurements are basically consistent.

[0045] The utility model provides a detection device for improving the accuracy of measuring the inner diameter of an object. The device utilizes an existing traditional internal micrometer as a basis. By threading holes in the internal micrometer body and each extension rod, a detachable external miniature horizontal angle measuring device with 90° rotation is connected. When measuring a workpiece, the internal micrometer body is adjusted and the angle scale value of the external horizontal angle measuring device is observed to locate the horizontality and verticality of the internal micrometer. This unifies the angle of the workpiece when measuring, thereby avoiding the problem of large measurement errors caused by deviations in the reference position of the same workpiece when measured by different environments or different individuals. When the workpiece is placed horizontally, the horizontal angle measuring device can be adjusted to a horizontal position to measure the workpiece. When the workpiece is not horizontal, the tilt scale value of the horizontal angle measuring device can be observed to locate the measured angle and record it, providing a reference for the next unified angle measurement. When the workpiece is placed vertically for measurement, the horizontal angle measuring device can be rotated to a position perpendicular to the internal micrometer to locate the measurement reference point. Finally, multiple measurements can be achieved, and the internal micrometer measurement data is free from the problem of human measurement errors caused by different individuals measuring the same workpiece.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A detection device for improving the accuracy of measuring the inner diameter of an object, characterized in that: include: An inside micrometer, wherein a fixing screw hole is provided on the body of the inside micrometer; the fixing screw hole cooperates with a fixing bolt, the other end of the fixing bolt is connected to a horizontal angle measuring device, and the horizontal angle measuring device is detachably mounted on the inside micrometer through the fixing bolt and the fixing screw hole; the horizontal angle measuring device is rotatably connected to the fixing bolt.

2. A detection device for improving the accuracy of measuring the inner diameter of an object according to claim 1, characterized in that: The fixing bolt is a ball bolt.

3. A detection device for improving the accuracy of measuring the inner diameter of an object according to claim 2, characterized in that: A ball head seat is fixedly installed on the back of the horizontal angle measuring device.

4. A detection device for improving the accuracy of measuring the inner diameter of an object according to claim 3, characterized in that: The ball head seat has a hole diameter adapted to the ball head of the ball head bolt. The horizontal angle measuring device is rotatably connected to the ball head bolt through the cooperation between the ball head seat and the ball head.

5. The detection device for improving the measurement accuracy of the inner diameter of an object according to claim 1, characterized in that: The fixing screw hole is provided with a thread which is threadedly connected to the fixing bolt.

6. The detection device for improving the measurement accuracy of the inner diameter of an object according to claim 1, characterized in that: The inner surface of the fixing screw hole is smooth and is plugged into the fixing bolt.

7. A detection device for improving the accuracy of measuring the inner diameter of an object according to claim 6, characterized in that: The inside micrometer further comprises an extension rod; the extension rod is detachably mounted on the inside micrometer.

8. The detection device for improving the measurement accuracy of the inner diameter of an object according to claim 7, characterized in that: The extension rod is provided with a fixing screw hole, and the fixing screw hole cooperates with the fixing bolt to detachably mount the horizontal angle measuring device on the extension rod.

9. The detection device for improving the accuracy of measuring the inner diameter of an object according to claim 8, characterized in that: When the inside micrometer is connected to the extension rod for use, the horizontal angle measuring device is installed on the extension rod.

10. The detection device for improving the measurement accuracy of the inner diameter of an object according to claim 1, characterized in that: The horizontal angle measuring device is a micro level.

Images