Flatness detection device

Abstract

The utility model relates to the field of flatness detection, in particular to a flatness detection device which comprises a first fixing piece, a second fixing piece and a dial indicator, the second fixing piece penetrates through a circular ring and is inserted into the first fixing piece, at least two measuring holes are formed in the second fixing piece, and the dial indicator is inserted into the measuring holes to measure the flatness of the circular ring. The first fixing piece penetrates through the circular ring and is inserted into the circular ring so as to fix the circular ring, then the dial indicator is inserted into different measuring holes to measure numerical values of different positions of the circular ring, the numerical values are compared to obtain the maximum difference value, and if the maximum difference value is within the required tolerance, the circular ring is qualified. The measurement process is simple and fast, and only the second fixing piece needs to be plugged, the circular ring is placed, the dial indicator is plugged for measurement, and simple numerical value comparison is performed. The problem that the requirement for large-scale rapid measurement cannot be met when the flatness is measured in a three-coordinate dotting mode is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flatness detection, in particular to a flatness detection device. Background Art

[0002] Measuring flatness typically involves three-dimensional coordinate (CMM) point measurement. "CMM" can be considered a specific application or operating mode of CMM. It refers to the process of performing point measurement using a CMM. During this process, an operator or automated system controls the measuring probe to select multiple points on the surface of the object being measured to assess the size or shape of specific features. CMM point measurement requires extensive sampling and data processing of the test piece, resulting in relatively slow measurement speeds and inability to meet the demands of high-volume, rapid measurement. Utility Model Content

[0003] To solve the problem that the three-coordinate dot marking method for flatness measurement cannot meet the needs of large-scale rapid measurement.

[0004] The utility model provides a flatness detection device, comprising a first fixing member, a second fixing member and a dial indicator, wherein the second fixing member passes through a circular ring and is inserted into the first fixing member, and the second fixing member is provided with at least two measuring holes, and the dial indicator is inserted into the measuring holes to measure the flatness of the circular ring.

[0005] Preferably, a positioning hole is provided at the center of the top of the first fixing member, and a positioning pin is provided at the bottom of the second fixing member, and the positioning pin is inserted into the positioning hole.

[0006] Preferably, the positioning hole is in an inverted stepped shape, and the positioning pin is divided into a first step section and a second step section with its diameter gradually decreasing from top to bottom. The first step section is clamped to the ring, and the second step section is clamped to the positioning hole.

[0007] Preferably, the top of the second fixing member is a cylindrical structure.

[0008] Preferably, there are at least four measuring holes, and the measuring holes are arranged in a circular array at equal intervals on the second fixing member.

[0009] Preferably, the diameter of the measuring hole is 6-12 mm.

[0010] Preferably, the diameter of the measuring hole is 8 mm or 3 / 8 inch.

[0011] Preferably, the micrometer is provided with a shaft sleeve, a measuring rod is slidably connected to the lower end of the shaft sleeve, and the distance from the top surface of the ring to the top surface of the second fixing member is less than the length of the shaft sleeve.

[0012] The beneficial effects of the present invention are reflected in the following: a first fixing member is passed through the ring and inserted into the first fixing member to fix the ring, and then a micrometer is inserted into different measuring holes to measure the values ​​at different positions of the ring. The values ​​are compared to obtain the maximum difference. If the maximum difference is within the required tolerance, the ring is qualified. The measurement process is simple and fast, requiring only the insertion and removal of the second fixing member, the placement of the ring, the insertion and removal of the micrometer for measurement, and a simple comparison of the values. This solves the problem that the three-coordinate dot method for measuring flatness cannot meet the needs of large-scale rapid measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional diagram provided by the utility model.

[0014] Figure 2 This is an exploded view provided by the utility model.

[0015] Figure 3 This is a cross-sectional view provided by the present invention.

[0016] In the figure: 1-first fixing member; 11-positioning hole; 2-second fixing member; 21-measuring hole; 22-positioning pin; 221-first step section; 222-second step section; 3-micrometer; 31-sleeve; 32-measuring rod; 4-circular ring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] Reference Figure 1-Figure 3 A flatness detection device includes a first fixing member 1, a second fixing member 2 and a micrometer 3. The second fixing member 2 passes through a ring 4 and is inserted into the first fixing member 1. The second fixing member 2 is provided with at least two measuring holes 21. The micrometer 3 is inserted into the measuring hole 21 to measure the flatness of the ring 4.

[0019] The first fixture 1 is inserted through the ring 4 and inserted into the first fixture 1 to secure the ring 4. The dial gauge 3 is then inserted into different measuring holes 21. The values ​​at different positions on the ring 4 are measured and compared to obtain the maximum difference. If the maximum difference is within the required tolerance, the ring 4 passes. The measurement process is simple and quick: simply remove and insert the second fixture 2, place the ring 4, remove and insert the dial gauge 3, take the measurement, and then perform a simple value comparison. This solves the problem that three-coordinate dot-marking methods for flatness measurement cannot meet the needs of large-scale and rapid measurement.

[0020] In some embodiments, as Figure 2 and Figure 3 As shown, a positioning hole 11 is provided at the top center of the first fixing member 1 , and a positioning pin 22 is provided at the bottom of the second fixing member 2 , and the positioning pin 22 is inserted into the positioning hole 11 .

[0021] The first fixing member 1 and the second fixing member 2 are connected by inserting the positioning pin 22 into the positioning hole 11. The connection method of the pin is simple and fast, and it is convenient to fix the ring 4 between the first fixing member 1 and the second fixing member 2.

[0022] In some embodiments, as Figure 2 and Figure 3 As shown, the positioning hole 11 is in an inverted stepped shape, and the positioning pin 22 gradually decreases in diameter from top to bottom and is divided into a first step section 221 and a second step section 222 . The first step section 221 is clamped to the ring 4 , and the second step section 222 is clamped to the positioning hole 11 .

[0023] The outer side of the first step 221 abuts against the inner side of the ring 4, restricting the movement of the ring 4 and preventing the top of the ring 4 from warping or shifting side to side due to force applied during measurement with the dial gauge 3, which would affect the measurement results. The outer side of the second step 222 abuts against the second hole, restricting the movement of the second fixing member 2.

[0024] In some embodiments, the top of the second fixing member 2 is a cylindrical structure. The cylindrical structure is easy to pick up and grasp, thereby increasing the measurement speed.

[0025] In some embodiments, as Figure 2 As shown, at least four measuring holes 21 are provided, arranged in a circular array and equally spaced on the second fixing member 2. This arrangement ensures both accuracy and measurement speed. Four evenly spaced points on the plane form a rectangle. Using the diagonal of the rectangle as a reference, the flatness of the entire plane is assessed by measuring points on another diagonal line, either parallel or perpendicular to the diagonal. The flatness error is calculated by measuring the thickness of these four points.

[0026] In some embodiments, the diameter of the measuring hole 21 is 6 to 12 mm. Specifically, the diameter of the measuring hole 21 is set according to the specifications of the dial gauge 3 used, so that the diameter of the measuring hole 21 is equal to the diameter of the sleeve 31 of the dial gauge 3, thereby preventing the dial gauge 3 from tilting in the measuring hole 21 and causing inaccurate measurements.

[0027] Furthermore, the diameter of the measuring hole 21 is 8 mm or 3 / 8 inch, so as to match the micrometer gauge 3 on the market whose sleeve 31 has a diameter of 8 mm or 3 / 8 inch.

[0028] Further, such as Figure 2 and Figure 3As shown, the dial gauge 3 is provided with a sleeve 31, with a measuring rod 32 slidably connected to the lower end of the sleeve 31. The distance between the top surface of the ring 4 and the top surface of the second fixing member 2 is less than the length of the sleeve 31. This ensures that the measuring rod 32 has sufficient space to expand and contract when measuring with the dial gauge 3, preventing the bottom of the sleeve 31 from directly contacting the ring 4 and causing inaccurate readings.

[0029] In the description of the embodiments of the present invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "install," "connect," "connect," and "assemble" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flatness detection device, characterized in that: include: A first fixing member, a second fixing member and a dial indicator, wherein the second fixing member passes through the ring and is inserted into the first fixing member, and the second fixing member is provided with at least two measuring holes, and the dial indicator is inserted into the measuring holes to measure the flatness of the ring.

2. The flatness detection device according to claim 1, wherein: A positioning hole is provided at the center of the top of the first fixing member, and a positioning pin is provided at the bottom of the second fixing member. The positioning pin is inserted into the positioning hole.

3. The flatness detection device according to claim 2, wherein: The positioning hole is in an inverted stepped shape, and the positioning pin is divided into a first step section and a second step section with a diameter gradually decreasing from top to bottom. The first step section is clamped to the ring, and the second step section is clamped to the positioning hole.

4. The flatness detection device according to claim 1, wherein: The top of the second fixing member is a cylindrical structure.

5. The flatness detection device according to claim 4, characterized in that: There are at least four measuring holes, and the measuring holes are arranged in a circular array at equal intervals on the second fixing member.

6. The flatness detection device according to claim 4, characterized in that: The diameter of the measuring hole is 6-12 mm.

7. The flatness detection device according to claim 6, characterized in that: The diameter of the measuring hole is 8 mm or 3 / 8 inch.

8. The flatness detection device according to claim 1, wherein: The micrometer is provided with a shaft sleeve, the lower end of the shaft sleeve is slidably connected to a measuring rod, and the distance from the top surface of the ring to the top surface of the second fixing member is less than the length of the shaft sleeve.

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