A round ring metal plate flatness detection tool

Abstract

This utility model belongs to the technical field of flatness testing equipment, and provides a flatness testing fixture for annular sheet metal parts, including: a base with supporting feet at its bottom; a rotating seat located on top of the base and rotatably connected to it; a column with a circular cross-section, longitudinally positioned on one side of the rotating seat, with its bottom end fixedly connected to the top of the base; a cross arm located above the rotating seat, with its first end movably connected to the column and its second end fixed with a dial indicator, the dial indicator's probe facing the base; a first locking component located at the connection between the cross arm and the column, wherein the first locking component has a lockable and unlocked state that can be switched between each other; and a positioning component located on the rotating seat. The flatness testing fixture for annular sheet metal parts provided by this utility model has a simple structure and high measurement efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of flatness testing equipment, specifically to a flatness testing fixture for a circular sheet metal part. Background Technology

[0002] Flatness is one of the important geometric tolerance indicators for sheet metal parts. For circular sheet metal parts, its flatness directly affects subsequent assembly and performance. Traditional flatness inspection methods often use dial indicators or micrometers in conjunction with manual measurement, which suffers from problems such as cumbersome operation, low measurement efficiency, and large human error. This is especially true for circular sheet metal parts, where it is difficult to quickly and accurately inspect their flatness. Therefore, there is an urgent need for a special fixture for flatness inspection of circular sheet metal parts to improve inspection efficiency and accuracy. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a flatness inspection fixture for annular sheet metal parts, so as to solve or alleviate the above-mentioned technical problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides a flatness inspection fixture for annular sheet metal parts, comprising: The base has supporting feet at its bottom; A rotating base is disposed on top of the base and rotatably connected to the base; The column has a circular cross-section and is arranged longitudinally on one side of the rotating base. The bottom end of the column is fixedly connected to the top end of the base. A cross arm is disposed above the rotating base. The first end of the cross arm is movably connected to the column, and the second end is fixed with a dial indicator. The probe of the dial indicator faces the base. A first locking component is disposed at the connection between the crossarm and the column. The first locking component has a switchable locked state and an unlocked state. When the first locking component is in the locked state, it locks the crossarm to fix it in a set position. When the first locking component is in the unlocked state, it releases the lock on the crossarm, allowing the crossarm to be adjusted in height and axial angle. A positioning component is disposed on the rotating base, and the positioning component is used to achieve rapid positioning and clamping of the annular sheet metal part.

[0005] Further, the first locking component includes: The first locking arm has a first end fixedly connected to the first end of the cross arm and a second end extending away from the dial indicator. Two first locking arms are provided, and each first locking arm has a first slot on one side opposite to the column that is adapted to the column. A first helical fastener is disposed at the second end of the first locking arm and coupled to both of the first locking arms. By rotating the first helical fastener, the cross arm can be locked or unlocked.

[0006] Furthermore, the rotating seat is rotatably connected to the base via a bearing.

[0007] Furthermore, the bearing is a planar thrust bearing.

[0008] Furthermore, the dial indicator and the cross arm are detachably connected via a second locking assembly.

[0009] Further, the second locking component includes: The second locking arm has a first end fixedly connected to the second end of the horizontal arm, and the second end extends away from the first end of the horizontal arm. Two second locking arms are provided, and each of the two second locking arms has a second slot on one side opposite to the connecting shaft of the dial indicator. The second helical fastener is disposed at the second end of the second locking arm and coupled to both of the second locking arms. By rotating the second helical fastener, the dial indicator can be locked or unlocked.

[0010] Furthermore, the positioning component includes: A positioning seat is disposed on the top of the rotating seat. Two positioning seats are arranged opposite each other, and at least one positioning seat is slidably connected to the rotating seat. Each of the two positioning seats has a positioning groove on one opposite side that mates with a circular sheet metal part. An adjustment structure is provided on the rotating base, and the adjustment structure is used to adjust the distance between the two positioning bases.

[0011] Furthermore, only one of the positioning seats is slidably connected to the rotating seat, while the other positioning seat is fixedly connected to the rotating seat. The adjustment structure is located on the side of the slidable positioning seat away from the fixed positioning seat. The adjustment structure includes an adjustment column, which is rotatably mounted on the rotating seat. A cam is fixedly sleeved on the adjustment column, and the cam wall of the cam can abut against the end side wall of the positioning seat.

[0012] Furthermore, both positioning seats are slidably connected to the rotating seat. The adjustment structure includes two adjustment units, which are respectively disposed on opposite sides of the two positioning seats. Each adjustment unit includes an adjustment column, which is rotatably disposed on the rotating seat. At least one adjustment column is fixedly fitted with a cam, the cam wall of which can abut against the end side wall of the positioning seat.

[0013] Furthermore, a counterweight is coaxially arranged at the bottom of the rotating base, and the counterweight is fixedly connected to the rotating base.

[0014] The beneficial effects of this utility model are: The flatness inspection fixture for circular sheet metal parts provided by this utility model has a simple structure. By rotating the rotating seat in conjunction with the measurement of the dial indicator, the flatness of the circular sheet metal parts can be quickly inspected without the need for frequent manual movement of the dial indicator and the circular sheet metal parts. This not only improves the inspection efficiency but also the inspection accuracy. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 A perspective view of the flatness detection fixture for the annular sheet metal part provided in Embodiment 1 of this utility model in a first direction. Figure 2 for Figure 1 An enlarged view of part A is shown below; Figure 3 for Figure 1 An enlarged view of section B is shown below; Figure 4 for Figure 1 An enlarged view of section C is shown; Figure 5 for Figure 1 An enlarged view of section D is shown; Figure 6 for Figure 1 A perspective view of the flatness inspection fixture for the circular sheet metal part shown in the second direction; Figure 7 for Figure 1 An enlarged view of section E is shown; Figure 8 for Figure 1 An enlarged view of part F shown; Figure 9for Figure 1 A partial sectional view of the flatness inspection fixture for the circular sheet metal part shown. Figure 10 This is a perspective view of the flatness detection fixture for the annular sheet metal part provided in Embodiment 2 of this utility model. Figure 11 for Figure 10 An enlarged view of section G shown; Figure 12 for Figure 10 An enlarged view of section H is shown; Figure 13 for Figure 10 An enlarged view of part I shown; Figure 14 for Figure 10 A partial sectional view of the flatness inspection fixture for the circular sheet metal part shown.

[0017] Figure label: 100. Base; 110. Support foot; 200. Rotary seat; 210. Counterweight; 220. Guide rail; 300. Column; 400. Horizontal arm; 500. Dial indicator; 610. First locking arm; 611. First slot; 620. First spiral fastener; 710. Second locking arm; 711. Second slot; 720. Second spiral fastener; 810. Positioning seat; 811. Positioning groove; 812. Slider; 820. Adjusting column; 830. Cam; 900. Flat thrust bearing. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0019] like Figure 1-14 As shown, this utility model provides a flatness detection fixture for a circular sheet metal part, including a base 100, a rotating seat 200, a column 300, a cross arm 400, and a first locking assembly.

[0020] The base 100 has a support foot 110 at its bottom to support the entire device and maintain stability. Preferably, the height of the support foot 110 is adjustable, so that the level of the base 100 can be adjusted by adjusting the height of the support foot 110, ensuring that the entire fixture is in a level state and providing a stable foundation for testing.

[0021] The rotating seat 200 is disposed on top of the base 100 and rotatably connected to the base 100. Specifically, the rotating seat 200 is located at the center of the top of the base 100, and is rotatably connected to the base 100 via a bearing. Because the planar thrust bearing 900 has the characteristics of high load-bearing capacity, low coefficient of friction, and high rotational accuracy, it can effectively ensure that the rotating seat 200 does not wobble significantly during rotation, thus guaranteeing the accuracy of the test data. Therefore, the planar thrust bearing 900 is preferred.

[0022] The column 300 has a circular cross-section and is longitudinally positioned on one side of the rotating base 200. The bottom end of the column 300 is fixedly connected to the top end of the base 100. Specifically, the connection method can be welding, threaded connection, interference fit, adhesive connection, bolt fixing, etc., without further restrictions.

[0023] A horizontal arm 400 is positioned above the rotating base 200. The first end of the horizontal arm 400 is movably connected to the column 300, giving it two degrees of freedom for adjustment: first, it can move axially along the column 300 to adjust its height; second, it can rotate about the axis of the column 300 to adjust its axial angle, thereby changing the detection position of the dial indicator 500 on the horizontal plane. The second end of the horizontal arm 400 is fixed to the dial indicator 500. The probe of the dial indicator 500 faces the base 100 to ensure that during detection, the probe can contact the upper surface of the annular sheet metal part placed on the rotating base 200.

[0024] To ensure that the crossarm 400 can be fixed in a set position after its height and axial angle are changed, preventing displacement during the detection process, a first locking component is provided. This first locking component is located at the connection between the crossarm 400 and the column 300. The first locking component has a switchable locked state and an unlocked state. When the first locking component is in the locked state, it locks the crossarm 400, fixing it in the set position. When the first locking component is in the unlocked state, it releases the lock on the crossarm 400, allowing it to move and thus adjust its height and axial angle.

[0025] The positioning component is mounted on the rotary seat 200. The positioning component is used to quickly position and clamp the annular sheet metal part to ensure that the annular sheet metal part does not shift radially or circumferentially during the inspection process.

[0026] Working principle: S1. Place the testing fixture on a flat workbench. By rotating the support foot 110 at the bottom of the base 100, use a level (such as a bubble level) to check the levelness of the upper surface of the base 100 until the base 100 is in a level state. Check the accuracy of the dial indicator 500 to ensure that it is in normal working condition.

[0027] S2, the circular sheet metal part is fixed on the rotating seat 200 by the positioning component to ensure that the circular sheet metal part will not shift during rotation, and the center of the circular sheet metal part is coaxial with the center of the rotating seat 200.

[0028] S3, place the first locking component in the locked state, move the horizontal arm 400 along the axis of the column 300 so that the probe of the dial indicator 500 contacts the upper surface of the annular sheet metal part, and gently press the probe until the pointer of the dial indicator 500 rotates at a certain angle to ensure that the probe is in full contact with the surface of the annular sheet metal part; rotate the horizontal arm 400 around the column 300 to move the dial indicator 500 to the detection start position; switch the first locking component to the locked state to fix the position of the horizontal arm 400.

[0029] S4. Slowly rotate the rotating seat 200 to drive the circular sheet metal part to rotate synchronously. During the rotation, closely observe the change in the reading of the dial indicator 500 and record the maximum and minimum values ​​of the dial indicator 500. Calculate the difference between the maximum and minimum values. This difference is the flatness deviation of the circumference being tested.

[0030] S5, release the locking state of the first locking component, move the cross arm 400 to another detection circumference position (such as moving radially along the annular sheet metal part), repeat the operation of steps 3-4, measure the flatness deviation of multiple different circumferences; combine all the detection data to determine whether the overall flatness of the annular sheet metal part meets the requirements.

[0031] S6. After the inspection is completed, remove the circular sheet metal part; repeat steps S2-S5 to inspect the next circular sheet metal part.

[0032] The flatness inspection fixture for the circular sheet metal parts provided in this embodiment has a simple structure. By rotating the rotating seat 200 in conjunction with the measurement of the dial indicator 500, the flatness of the circular sheet metal parts can be quickly inspected without the need for frequent manual movement of the dial indicator 500 and the circular sheet metal parts. This not only improves the inspection efficiency but also the inspection accuracy.

[0033] The flatness inspection fixture for circular sheet metal parts provided by this utility model uses the rotation of the rotating seat 200 to drive the circular sheet metal part to rotate. Combined with the fixed measurement method of the dial indicator 500, it eliminates the need for frequent manual movement of the dial indicator 500 or the circular sheet metal part. A single adjustment is sufficient to complete the flatness inspection of a single circumference, significantly shortening the inspection time, improving work efficiency, and increasing inspection accuracy. Simultaneously, the rapid adjustment function of the positioning component further enhances the clamping efficiency of the circular sheet metal part.

[0034] like Figure 1 , 2 As shown in Figures 10 and 11, in this embodiment, the first locking component includes a first locking arm 610 and a first spiral fastener 620.

[0035] The first end of the first locking arm 610 is fixedly connected to the first end of the horizontal arm 400, and the second end extends away from the dial indicator 500. Specifically, in this embodiment, the first locking arm 610 and the horizontal arm 400 are integrally formed. However, in other alternative embodiments, the first locking arm 610 and the horizontal arm 400 can be fixedly connected by welding, gluing, interference fit, threaded connection, and bolt connection.

[0036] Two first locking arms 610 are provided, and a first slot 611 adapted to the column 300 is opened on the opposite side of the two first locking arms 610. Preferably, the curvature of the first slot 611 is completely fitted with the outer curvature of the column 300 to increase the clamping area and improve the locking stability.

[0037] The first helical fastener 620 is disposed at the second end of the first locking arm 610 and coupled to both first locking arms 610. By rotating the first helical fastener 620, the gap between the two first locking arms 610 is increased or decreased, thereby locking or unlocking the cross arm 400.

[0038] Specifically, in this embodiment, the first spiral fastener 620 is rotatably connected to one of the first locking arms 610, allowing it to rotate relative to the first locking arm 610 but not to move axially. After passing through the first locking arm 610, the first spiral fastener 620 is threadedly connected to the other first locking arm 610.

[0039] In other alternative embodiments, the first helical fastener 620 can be a forward and reverse screw with threads of opposite directions at both ends, which respectively engage with the threaded holes of the two first locking arms 610. Rotating the screw can simultaneously drive the two locking arms to move relative to or in opposite directions.

[0040] The first spiral fastener 620 can also be a regular screw. The first spiral fastener 620 passes through two first locking arms 610 and is locked at the end of the screw by a nut. The gap between the two locking arms can be adjusted by tightening or loosening the nut.

[0041] Preferably, one end of the first spiral fastener 620 is provided with an operating handle to facilitate rotation of the first spiral fastener 620.

[0042] Working principle: When locked, the first spiral fastener 620 is rotated in the first direction (which can be either clockwise or counterclockwise) to reduce the gap between the two first locking arms 610, thereby squeezing the column 300 and thus locking the cross arm 400.

[0043] When unlocking, the first spiral fastener 620 is rotated in the second direction (opposite to the first direction) to increase the gap between the two first locking arms 610, thereby reducing or even eliminating the pressure of the first locking arms 610 on the column 300, thus achieving the purpose of releasing the lock on the cross arm 400.

[0044] The first locking component provided in this embodiment has a simple structure. Locking and unlocking can be completed quickly by rotating the first spiral fastener 620. It is easy to operate and has a stable clamping force, which can effectively ensure the positional accuracy of the cross arm 400 during the detection process.

[0045] To facilitate the replacement and maintenance of the dial indicator 500. For example... Figure 1 , 3 As shown in Figures 10 and 12, in this embodiment, the dial indicator 500 and the cross arm 400 are detachably connected by the second locking component, ensuring that the dial indicator 500 is reliably fixed during the testing process. At the same time, when the dial indicator 500 malfunctions or needs to be replaced with a dial indicator 500 of different accuracy specifications, disassembly and assembly can be completed quickly.

[0046] The second locking component includes a second locking arm 710 and a second spiral fastener 720.

[0047] The first end of the second locking arm 710 is fixedly connected to the second end of the cross arm 400, and the second end extends away from the first end of the cross arm 400. Specifically, in this embodiment, the second locking arm 710 and the cross arm 400 are integrally formed. However, in other alternative embodiments, the second locking arm 710 and the cross arm 400 can be fixedly connected by welding, gluing, interference fit, threaded connection, and bolt connection.

[0048] There are two second locking arms 710, and a second slot 711 adapted to the connecting shaft of the dial indicator 500 is opened on the opposite side of the two second locking arms 710.

[0049] The second helical fastener 720 is disposed at the second end of the second locking arm 710 and coupled to both second locking arms 710. By rotating the second helical fastener 720, the gap between the two second locking arms 710 is increased or decreased, thereby locking or unlocking the dial indicator 500.

[0050] Specifically, in this embodiment, the second spiral fastener 720 is rotatably connected to one of the second locking arms 710, allowing it to rotate relative to the first locking arm 610, but not to move axially. After passing through the second locking arm 710, the second spiral fastener 720 is threadedly connected to the other second locking arm 710.

[0051] In other alternative embodiments, the second helical fastener 720 can be a forward and reverse screw with opposite threads at both ends, which respectively engage with the threaded holes of the two second locking arms 710. Rotating the screw can simultaneously drive the two locking arms to move relative to or in opposite directions.

[0052] The second spiral fastener 720 can also be a regular screw. The second spiral fastener 720 passes through two second locking arms 710 and is locked at the end of the screw by a nut. The gap between the two locking arms can be adjusted by tightening or loosening the nut.

[0053] Preferably, one end of the second spiral fastener 720 is provided with an operating handle to facilitate rotation of the second spiral fastener 720.

[0054] Working principle: When locked, the second spiral fastener 720 is rotated in the first direction (which can be either clockwise or counterclockwise) to reduce the gap between the two second locking arms 710, thereby squeezing the dial indicator 500 and thus locking the dial indicator 500.

[0055] When unlocking, the second spiral fastener 720 is rotated in the second direction (opposite to the first direction) to increase the gap between the two second locking arms 710, thereby reducing or even eliminating the pressure of the second locking arms 710 on the column 300, thus achieving the purpose of unlocking the dial indicator 500.

[0056] The second locking component provided in this embodiment has a simple structure. Locking and unlocking can be completed quickly through the second rotating spiral fastener. It is easy to operate and has a stable clamping force, which can effectively ensure the positional accuracy of the dial indicator 500 during the detection process.

[0057] like Figure 1 , Figures 4 to 14 As shown, the positioning component includes a positioning seat 810 and an adjustment structure.

[0058] Positioning seats 810 are disposed on the top of the rotating seat 200. Two positioning seats 810 are arranged opposite each other, and at least one positioning seat 810 is slidably connected to the rotating seat 200, thereby allowing the distance between the two positioning seats 810 to be changed. Specifically, in this embodiment, both positioning seats 810 are slidably connected to the rotating seat 200. A positioning groove 811 that mates with a circular sheet metal part is provided on one side of each of the two positioning seats 810. In this embodiment, the positioning groove 811 is an arc-shaped groove; in other alternative embodiments, the positioning groove 811 may be a V-shaped groove extending axially along the rotating seat 200.

[0059] To improve the accuracy of the moving direction of the positioning seat 810, such as Figure 9 and Figure 14 As shown, in this embodiment, a guide rail 220 is fixedly installed on the top of the rotating seat 200, and a slider 812 adapted to the guide rail 220 is fixedly installed on the bottom of the positioning seat 810. The slider 812 is slidably sleeved on the guide rail 220. The guide rail 220 is a high-precision linear guide rail 220, and the fit clearance between the slider 812 and the guide rail 220 is extremely small, ensuring that the positioning seat 810 can only move along the direction of the guide rail 220 (i.e., the direction of the line connecting the two positioning seats 810).

[0060] Preferably, multiple guide rails 220 are arranged in parallel to improve the accuracy and stability of guiding the movement of the positioning seat 810, and at the same time, to better support the positioning seat 810. In this embodiment, two guide rails 220 are provided, symmetrically arranged on both sides of the positioning seat 810. However, in other alternative embodiments, three, four or even more guide rails 220 may be provided.

[0061] An adjustment structure is set on the rotating seat 200. The adjustment structure is used to adjust the distance between the two positioning seats 810 to achieve clamping and positioning of the annular sheet metal part.

[0062] like Figure 10 , Figure 13 and Figure 14 As shown, in this embodiment, only one positioning seat 810 is slidably connected to the rotating seat 200, while the other positioning seat 810 is fixedly connected to the rotating seat 200. An adjustment structure is located on the side of the slidable positioning seat 810 away from the fixed positioning seat 810. The adjustment structure includes an adjustment column 820.

[0063] An adjusting column 820 is rotatably mounted on a rotating seat 200. In this embodiment, the adjusting column 820 is threadedly connected to the rotating seat 200 to facilitate disassembly and installation. However, in other alternative embodiments, the adjusting column 820 is rotatably connected to the rotating seat 200. A cam 830 is fixedly sleeved on the adjusting column 820. In this embodiment, the cam 830 and the adjusting column 820 are integrally formed, but in other alternative embodiments, the connection between the cam 830 and the adjusting column 820 can be an interference fit, welding, adhesive bonding, bolt fixing, etc. The cam wall of the cam 830 can abut against the end side wall of the positioning seat 810.

[0064] Preferably, the top of the adjusting column 820 is provided with a screwing part, which can be a groove or a protrusion, so as to facilitate screwing the adjusting column 820.

[0065] During operation, the adjusting column 820 is rotated by a wrench or handle, which drives the cam 830 to rotate synchronously. Since the contour radius of the cam 830 changes periodically, the cam wall will generate an axial thrust on the positioning seat 810, pushing the sliding positioning seat 810 to move along the guide rail 220 towards the fixed positioning seat 810 until the arc grooves of the two positioning seats 810 clamp the annular sheet metal part. When the adjusting column 820 is rotated in the opposite direction, the small radius end of the cam 830 abuts against the positioning seat 810. Under the reaction force of the annular sheet metal part or the action of the return spring (optional setting), the positioning seat 810 moves in the opposite direction and releases the annular sheet metal part.

[0066] The flatness inspection fixture for the annular sheet metal parts provided in this embodiment can achieve the positioning and clamping of the annular sheet metal parts by simply moving the other positioning seat 810, since one positioning seat 810 is fixed. Therefore, it is convenient to perform batch inspection of annular sheet metal parts with the same outer diameter.

[0067] like Figure 1 , Figures 4 to 9 As shown, in this embodiment, both positioning seats 810 are slidably connected to the rotating seat 200. The adjustment structure includes two adjustment units, which are respectively located on opposite sides of the two positioning seats 810.

[0068] The adjustment unit includes an adjustment column 820.

[0069] The adjusting column 820 is rotatably mounted on the rotating seat 200. In this embodiment, the adjusting column 820 is threadedly connected to the rotating seat 200 to facilitate the removal and installation of the adjusting column 820. However, in other alternative embodiments, the adjusting column 820 is rotatably connected to the rotating seat 200. Furthermore, at least one adjusting column 820 is fixedly fitted with a cam 830. The cam wall of the cam 830 can abut against the end side wall of the positioning seat 810.

[0070] In this embodiment, only one adjusting column 820 is fitted with a cam 830. Therefore, only one positioning seat 810 needs to be moved to achieve the positioning and clamping of the annular sheet metal parts, which facilitates batch inspection of annular sheet metal parts with the same radius.

[0071] However, in other alternative embodiments, cams 830 are fitted on both adjusting columns 820 to enable the detection of annular sheet metal parts of different radii.

[0072] Preferably, the top of the adjusting column 820 is provided with a screwing part, which can be a groove or a protrusion, so as to facilitate screwing the adjusting column 820.

[0073] During operation, the adjusting column 820 is rotated by a wrench or handle, which drives the cam 830 to rotate synchronously. Since the contour radius of the cam 830 changes periodically, the cam wall will generate an axial thrust on the positioning seat 810, pushing the sliding positioning seat 810 to move along the guide rail 220 towards the fixed positioning seat 810 until the arc grooves of the two positioning seats 810 clamp the annular sheet metal part. When the adjusting column 820 is rotated in the opposite direction, the small radius end of the cam 830 abuts against the positioning seat 810. Under the reaction force of the annular sheet metal part or the action of the return spring (optional setting), the positioning seat 810 moves in the opposite direction and releases the annular sheet metal part.

[0074] The adjustment component provided in this embodiment is easy to adjust. The self-locking characteristic of the cam 830 can achieve stable clamping of the positioning seat 810 and prevent loosening during the detection process.

[0075] like Figure 9 and Figure 14 As shown, in this embodiment, a counterweight 210 is coaxially disposed at the bottom of the rotating base 200. The counterweight 210 is fixedly connected to the rotating base 200. The counterweight 210 is made of high-density metal material (such as cast iron or lead alloy), and its weight is reasonably designed according to the weight of the rotating base 200 and common circular sheet metal parts. By increasing the overall inertia of the rotating base 200, vibration during rotation can be effectively suppressed, avoiding fluctuations in the dial indicator 500 reading due to unstable rotation.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A round ring-shaped sheet metal part flatness detection tool, characterized in that, include: The base has supporting feet at its bottom; A rotating base is disposed on top of the base and rotatably connected to the base; The column has a circular cross-section and is arranged longitudinally on one side of the rotating base. The bottom end of the column is fixedly connected to the top end of the base. A cross arm is disposed above the rotating base. The first end of the cross arm is movably connected to the column, and the second end is fixed with a dial indicator. The probe of the dial indicator faces the base. A first locking component is disposed at the connection between the crossarm and the column. The first locking component has a switchable locked state and an unlocked state. When the first locking component is in the locked state, it locks the crossarm to fix it in a set position. When the first locking component is in the unlocked state, it releases the lock on the crossarm, allowing the crossarm to be adjusted in height and axial angle. A positioning component is disposed on the rotating base, and the positioning component is used to achieve rapid positioning and clamping of the annular sheet metal part.

2. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 1, wherein The first locking component includes: The first locking arm has a first end fixedly connected to the first end of the cross arm and a second end extending away from the dial indicator. Two first locking arms are provided, and each first locking arm has a first slot on one side opposite to the column that is adapted to the column. A first helical fastener is disposed at the second end of the first locking arm and coupled to both of the first locking arms. By rotating the first helical fastener, the cross arm can be locked or unlocked.

3. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 1 or 2, characterized in that, The rotating seat is rotatably connected to the base via bearings.

4. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 3, wherein The bearing is a planar thrust bearing.

5. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 1, 2 or 4, wherein The dial indicator and the cross arm are detachably connected via a second locking component.

6. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 5, wherein The second locking component includes: The second locking arm has a first end fixedly connected to the second end of the horizontal arm, and the second end extends away from the first end of the horizontal arm. Two second locking arms are provided, and each of the two second locking arms has a second slot on one side opposite to the connecting shaft of the dial indicator. The second helical fastener is disposed at the second end of the second locking arm and coupled to both of the second locking arms. By rotating the second helical fastener, the dial indicator can be locked or unlocked.

7. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 1, 2, 4 or 6, wherein The positioning component includes: A positioning seat is disposed on the top of the rotating seat. Two positioning seats are arranged opposite each other, and at least one positioning seat is slidably connected to the rotating seat. Each of the two positioning seats has a positioning groove on one opposite side that mates with a circular sheet metal part. An adjustment structure is provided on the rotating base, and the adjustment structure is used to adjust the distance between the two positioning bases.

8. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 7, wherein Only one of the positioning seats is slidably connected to the rotating seat, while the other positioning seat is fixedly connected to the rotating seat. The adjustment structure is located on the side of the slidable positioning seat away from the fixed positioning seat. The adjustment structure includes an adjustment column, which is rotatably mounted on the rotating seat. A cam is fixedly sleeved on the adjustment column, and the cam wall of the cam can abut against the end side wall of the positioning seat.

9. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 8, wherein Both positioning seats are slidably connected to the rotating seat. The adjustment structure includes two adjustment units, which are respectively disposed on opposite sides of the two positioning seats. Each adjustment unit includes an adjustment column, which is rotatably disposed on the rotating seat. At least one adjustment column is fixedly fitted with a cam, the cam wall of which can abut against the end side wall of the positioning seat.

10. The flatness detection tool for a circular ring-shaped sheet metal part according to claim 9, wherein A counterweight is coaxially mounted on the bottom of the rotating base, and the counterweight is fixedly connected to the rotating base.

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