CN211147550U - Detection device for detecting deflection degree of piston ring and flatness of thrust washer - Google Patents
Detection device for detecting deflection degree of piston ring and flatness of thrust washer Download PDFInfo
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- CN211147550U CN211147550U CN202020183963.0U CN202020183963U CN211147550U CN 211147550 U CN211147550 U CN 211147550U CN 202020183963 U CN202020183963 U CN 202020183963U CN 211147550 U CN211147550 U CN 211147550U
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- rod
- bottom plate
- flatness
- linear guide
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Abstract
A detection device for detecting the flexibility of a piston ring and the flatness of a thrust washer relates to the technical field of detection devices, solves the problems of long time consumption and complex structure of horizontal adjustment of the existing detection device, and comprises a bottom plate; the adjusting foot is arranged on the bottom plate and positioned on the lower side of the bottom plate; a bubble level mounted on the base plate; a linear guide rail installed on the upper surface of the base plate; a slider mounted on the linear guide; a first plate mounted on the slider; the second plate is arranged on the bottom plate and corresponds to the first plate, and the surface of the second plate facing the first plate is parallel to the surface of the first plate facing the second plate and is vertical to the upper surface of the bottom plate; a vertical plate arranged on the bottom plate; the lead screw is used for connecting the vertical plate and the first plate; a hand wheel connected with the screw rod; the digital display dial indicator bracket is arranged on the bottom plate; and the digital display dial indicator is arranged on the digital display dial indicator bracket. The utility model discloses simple structure, horizontal adjustment is easy and simple to handle, and it is higher to detect the precision.
Description
Technical Field
The utility model relates to a detection device technical field, concretely relates to a detection device that is used for piston ring degree of flexure and thrust washer plane degree.
Background
The deflection degree of the piston ring and the flatness of the thrust washer have similar inspection principles, and the existing deflection degree detection device of the piston ring can meet the inspection of the two products. But some of current detection device are equipped with the nut that is used for adjusting splint depth of parallelism, and some spouts that are equipped with locking piece and locking piece adaptation are used for locking splint, and detection device structural design is complicated, and horizontal adjustment before detection of detection device is inconvenient simultaneously, consume time long.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a detection device for piston ring deflection degree and thrust washer plane degree, this detection device simple structure, regulation convenience, detection precision are higher.
The utility model discloses a solve the technical scheme that technical problem adopted as follows:
a device for detecting the deflection of a piston ring and the flatness of a thrust washer, comprising:
a base plate;
the adjusting foot is arranged on the bottom plate and positioned on the lower side of the bottom plate;
a bubble level mounted on the base plate;
a linear guide rail installed on the upper surface of the base plate;
a slider mounted on the linear guide;
a first plate mounted on the slider;
the second plate is arranged on the bottom plate and corresponds to the first plate, and the surface of the second plate facing the first plate is parallel to the surface of the first plate facing the second plate and is vertical to the upper surface of the bottom plate;
the vertical plate is arranged on the bottom plate, and a threaded hole is formed in the vertical plate;
the screw rod is connected with the threaded hole, and one end of the screw rod is connected with the first plate through a bearing;
a hand wheel connected with the other end of the screw rod;
the digital display dial indicator support is arranged on the bottom plate and comprises a third plate connected with the linear guide rail, a supporting rod connected with the third plate, a polished rod connected with the supporting rod through a crossed rod frame I and a crossed rod frame II connected with the polished rod;
and the digital display dial indicator is arranged between the vertical plate and the first plate, corresponds to the first plate and is used for measuring the gap between the first plate and the second plate.
Furthermore, the vertical plate, the digital display dial indicator support, the first plate and the second plate are sequentially arranged.
Furthermore, the two rod mounting holes of the first cross rod frame are perpendicular to each other, and the two rod mounting holes of the second cross rod frame are perpendicular to each other.
Furthermore, the first cross bar frame and the second cross bar frame both adopt universal cross bar frames.
Further, the bubble level meter adopts a circular bubble level meter.
Further, the second plate is fixed on the linear guide rail through bolts.
Furthermore, the measuring end of the measuring rod of the digital display dial indicator contacts the first plate, and the digital display dial indicator is used for measuring the moving distance of the first plate along the linear guide rail.
The utility model has the advantages that:
1. the utility model discloses an adjust foot and bubble spirit level, improve the efficiency of level (l) ing before detection device detects, adjust convenient quick, guarantee the accuracy that detects.
2. The gap between the plates is adjusted in real time through the hand wheel, the screw rod, the first plate, the digital display dial indicator bracket and the digital display dial indicator, so that the testing requirement is met, the control precision is accurate, and no gap or backlash exists in the use process.
3. Through the setting of adjusting foot, bubble spirit level, first board and second board, need not additionally to adjust the operation that first board of calibration and second board are parallel, through the screw locking of lead screw and riser, need not additionally to set up the locking device between slider and linear guide, the utility model discloses simple structure uses easy operation.
4. The utility model discloses can be used for the detection of piston ring deflection degree also can be used for the detection of thrust packing ring plane degree, simple structure, it is simple and convenient to use, and the flexible operation detects the precision higher.
Drawings
Fig. 1 is a schematic view of the overall structure of the device for detecting the degree of deflection of a piston ring and the flatness of a thrust washer according to the present invention.
Fig. 2 is a structural view of the base plate.
Fig. 3 is a structural view of the adjustment foot.
Fig. 4 is a structural view of the linear guide.
Fig. 5 is a structural view of the slider.
Fig. 6 is a structural view of the first plate.
Fig. 7 is a structural view of the second plate.
Fig. 8 is a structural view of the vertical plate.
Fig. 9 is a structural view of the lead screw.
Fig. 10 is a structural view of the hand wheel.
Fig. 11 is a structural view of a bearing.
Fig. 12 is a structural view of a third plate.
Fig. 13 is a structural view of the support bar.
Fig. 14 is a structural view of the light rod.
Fig. 15 is a structural view of the second cross bar frame.
Fig. 16 is a structural view of the digital dial indicator.
Fig. 17 is a structural view of a piston ring.
In the figure: 1. the device comprises a second plate, 2, a piston ring, 3, a first plate, 4, a bearing, 5, a digital display dial indicator, 6, a second cross rod frame, 6.1, a second polished rod mounting hole, 6.2, a digital display dial indicator mounting hole, 7, a lead screw, 8, a polished rod, 9, a support rod, 10, a vertical plate, 11, a hand wheel, 12, a bubble level gauge, 13, a first cross rod frame, 14, a third plate, 15, a linear guide rail, 16, a bottom plate, 17 and an adjusting foot.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The utility model provides a detection apparatus for be used for piston ring degree of flexure and thrust washer plane degree, includes bottom plate 16, adjusts foot 17, bubble spirit level 12, linear guide 15, slider, first board 3, second board 1, riser 10, lead screw 7, hand wheel 11, digital display amesdial support and digital display amesdial 5.
The adjusting foot 17 is installed on the bottom plate 16, the adjusting foot 17 is connected with the bottom plate 16, and the adjusting foot 17 is located on the lower side of the bottom plate 16. The bottom plate 16 is shown in fig. 2, and the adjusting foot 17 is shown in fig. 3. The adjusting foot 17 can be called as an adjustable pad foot with a nut or an anchor nut, and comprises a nut and a screw rod, wherein the nut is used as a supporting seat, one end of the screw rod is connected with the nut, the other end of the screw rod is connected with the bottom plate 16, and a first threaded hole is formed in the bottom plate 16 corresponding to the screw rod. The bubble level 12 is mounted on the bottom plate 16 and is positioned on the upper surface of the bottom plate 16, and the bubble level 12 is a circular bubble level. A detection device for detecting the flexibility of a piston ring and the flatness of a thrust washer is placed on a test table board through an adjusting foot 17, and the adjusting foot 17 supports the detection device and is used for adjusting and ensuring the level of a bottom plate 16.
The upper surface of a bottom plate 16 is provided with linear guide rails 15, the linear guide rails 15 are shown in figure 4, the number of the linear guide rails 15 is 2, the linear guide rails 15 are fixed on the bottom plate 16 through bolts, the linear guide rails 15 are provided with sliding blocks, the sliding blocks are shown in figure 5, the sliding blocks are provided with first plates 3, the first plates 3 can be flat plates and can be installed on the first plates 3 through bolts or L-shaped plates, the L-shaped first plates 3 comprise horizontal split bodies I connected with the sliding blocks through bolts and vertical split bodies I connected with the horizontal split bodies I, the horizontal split bodies I and the vertical split bodies I are fixedly connected and can be of an integrated structure, the horizontal split bodies I are connected with the sliding blocks, the vertical split bodies I are perpendicular to the upper surface of the bottom plate 16, the first plates 3 can move along the linear guide rails 15 along with the sliding blocks, and therefore the first plates 3 serve as movable plates of a detection device, and.
The second plate 1 is mounted on the bottom plate 16, in the embodiment, the second plate 1 is directly and fixedly mounted on the linear guide rail 15 through bolts, the second plate 1 is not connected with the linear guide rail but directly and fixedly mounted on the bottom plate 16 through bolts, the second plate 1 is used as a fixing plate of the detection device, the second plate 1 can be a flat plate or an L type plate, the L type second plate 1 comprises a horizontal split body and a vertical split body connected with the horizontal split body, the horizontal split body and the vertical split body are fixedly connected and can be of an integral structure, the horizontal split body is connected with the linear guide rail 15, the vertical split body is perpendicular to the upper surface of the bottom plate 16, and the second plate 1 can be of a structure as shown in fig. 7.
The second plate 1 and the first plate 3 are correspondingly arranged, the vertical split body II and the vertical split body I are parallel to each other, namely the vertical split body I is used as a movable plate of the detection device, the vertical split body II is used as a fixed plate of the detection device, the movable plate and the fixed plate jointly form a clamping plate of the piston ring 2 and the thrust washer, and a gap between the vertical split body II and the vertical split body I is used for detecting the deflection degree of the piston ring 2 and the flatness of the thrust washer. The surface of the first plate 3 corresponding to the second plate 1 is a plane, that is, the surface of the first plate 3 (vertical split one) facing the second plate 1 is a plane, and the surface of the first plate 3 facing the second plate 1 is perpendicular to the upper surface of the bottom plate 16. The surface of the second plate 1 (vertical split two) corresponding to the first plate 3 is a plane, that is, the surface of the second plate 1 facing the first plate 3 is a plane, and the surface of the second plate 1 facing the first plate 3 is perpendicular to the upper surface of the bottom plate 16. The surface of the first plate 3 facing the second plate 1 is parallel to the surface of the second plate 1 facing the first plate 3, i.e. the plane of the clamping plate in contact with the piston rings 2 and the thrust washers. The second plate 1 or the first plate 3 between the second plate 1 and the first plate 3 can be provided with an inclined block to facilitate the taking out of the detection object.
The vertical plate 10 is installed on the bottom plate 16, the vertical plate 10 is shown in fig. 8, and the vertical plate 10 is directly installed on the bottom plate 16 through bolts and nuts. The vertical plate 10 is provided with a threaded hole which is connected with the screw rod 7. One end (head end) of the screw rod 7 is connected with the hand wheel 11, the other end (tail end) of the screw rod 7 is connected with the first plate 3 through the bearing 4, and the screw rod 7 is connected with the threaded hole through threads on the screw rod. The bearing mounting hole has been seted up on the first board 3, and bearing 4 passes through the bearing mounting hole and sets up on the first board 3. The screw rod 7 is shown in fig. 9, the hand wheel 11 is shown in fig. 10, the bearing 4 is shown in fig. 11, the hand wheel 11 is positioned on one side of the vertical plate 10, and the digital dial indicator support is positioned on the other side of the vertical plate 10. The lead screw 7 is rotated by manually rotating the hand wheel 11, and the lead screw 7 rotates to drive the first plate 3 to move along the linear guide rail 15. Whether the first plate 3 and the second plate 1 are attached or not, namely, the gap between the first plate 3 and the second plate 1 can be controlled by rotating the hand wheel 11. The gap between the first plate 3 and the second plate 1 is 0 or more.
The digital display dial indicator support is arranged on the bottom plate 16, and is directly arranged on the linear guide rail 15 through a bolt in the embodiment and is positioned between the vertical plate 10 and the first plate 3. Namely, the second plate 1, the first plate 3, the digital display dial indicator bracket and the vertical plate 10 are arranged in sequence. The digital display dial indicator support comprises a third plate 14, a support rod 9, a first crossed rod frame 13, a polish rod 8 and a second crossed rod frame 6. The third plate 14 is shown in fig. 12, the support rod 9 is shown in fig. 13, the polish rod 8 is shown in fig. 14, and the cross rod frame two 6 is shown in fig. 15. Third board 14 passes through bolted connection linear guide 15, bracing piece 9 one end has the screw thread, be equipped with screw hole two on the third board 14, the screw thread is passed through to the one end that bracing piece 9 has the screw thread and is connected screw hole two of third board 14, bracing piece 9 perpendicular to third board 14, the quantity of bracing piece 9 is two, two bracing pieces 9 are connected through crossing a pole frame 13 to polished rod 8, crossing a pole frame 13 connecting support rod 9 and polished rod 8, as the connecting piece of bracing piece 9 and polished rod 8, polished rod 8 passes through crossing a pole frame two 6 connecting digital display amesdial 5's last pole, crossing a pole frame two 6 connecting polished rod 8 and digital display amesdial 5, as the connecting piece of polished rod 8 and digital display amesdial 5. In the embodiment, two rod mounting holes of the first cross rod frame 13 are perpendicular to each other, namely the two rod mounting holes are a central shaft of a mounting hole of the support rod 9 and a central shaft of a mounting hole of the polish rod 8, and an included angle between the central shaft of the mounting hole of the support rod 9 and the central shaft of the mounting hole of the polish rod 8 is 90 degrees; the two rod mounting holes of the cross rod frame II 6 are perpendicular to each other, namely the two rod mounting holes are polished rod mounting holes II 6.1 and digital display dial indicator mounting holes 6.2, and the included angle between the central shaft of the polished rod mounting holes II 6.1 and the central shaft of the digital display dial indicator mounting holes 6.2 is 90 degrees. The first cross bar frame 13 and the second cross bar frame 6 can adopt universal cross bar frames.
Before testing, the adjusting feet 17 are adjusted to enable the circular bubble level 12 to be in the central position, and the second plate 1 and the first plate 3 are ensured to be fixed in the vertical direction. Rotating the hand wheel 11, anticlockwise rotating the screw rod 7, and fixing the tail end of the screw rod 7 in the bearing 4, wherein the rotating screw rod 7 drives the first plate 3 on the linear guide rail 15 to move, so that the first plate 3 is attached to the second plate 1, the measuring rod of the digital display dial indicator 5 is adjusted, the end part of the measuring rod of the digital display dial indicator 5 is just contacted with the first plate 3, and the reading of the digital display dial indicator 5 is 0. After the adjustment is accomplished, clockwise rotation hand wheel 11, rotatory lead screw 7 drives the first board 3 removal on the linear guide 15, the distance between first board 3 and second board 1 has been adjusted in the removal that the removal of first board 3 drove digital display first board 3 simultaneously, 5 synchronous motion of digital display amesdial, can realize the real-time accurate regulation of first board 3 and 1 interval of second board, begin the test after 3 to the regulation clearance of pulling first board through lead screw 7, clearance value accessible digital display amesdial 5 read out in real time.
Piston ring 2 as in fig. 17, testing of deflection of piston ring 2: according to the requirements of GB/T1149.5-2008 standard, the piston ring 2 to be tested can fall between two vertical flat plates (a first plate 3 and a second plate 1) within a specified gap by means of self weight to be qualified. When the diameter of the piston ring 2 is less than 100mm, adjusting the gap between the first plate 3 and the second plate 1 to be 0.050mm higher than the ring; when the diameter of the piston ring 2 is greater than or equal to 100mm and smaller than 125mm, adjusting the clearance between the first plate 3 and the second plate 1 to be 0.075mm of the ring height; when the diameter of the piston ring 2 is greater than or equal to 125mm, the gap between the first plate 3 and the second plate 1 is adjusted to be 0.100mm added to the ring height.
Testing the flatness of the thrust washer: according to the requirement of GB/T10447-2008 standard, the thrust washer to be tested can pass between the first plate 3 and the second plate 1, the distance between which is the maximum thickness of the thrust washer plus the limit clearance. When the measured outer diameter of the thrust washer is less than 80mm, adjusting the gap between the first plate 3 and the second plate 1 to be the maximum thickness of the thrust washer plus 0.10 mm; when the measured outer diameter of the thrust washer is greater than or equal to 80mm and smaller than 120mm, adjusting the gap between the first plate 3 and the second plate 1 to be the maximum thickness of the thrust washer plus 0.12 mm; and when the measured outer diameter of the thrust washer is larger than or equal to 120mm and smaller than 160mm, adjusting the gap between the first plate 3 and the second plate 1 to be the maximum thickness of the thrust washer plus 0.15 mm.
The utility model discloses when carrying out the horizontal adjustment before the inspection, observe bubble spirit level 12 quick adjustment detection device simultaneously through adjusting regulation foot 17 and make bottom plate 16 level, first board 3 and the equal perpendicular to bottom plate 16 of second board 1 at the time of bottom plate 16 level for the clearance that detects is the same completely with the direction of gravity, guarantees the precision of detection operation, the utility model discloses a horizontal adjustment process has easy and simple to handle, swift, the time spent advantage few, that has improved inspection efficiency. The utility model discloses an adjust the setting of foot 17, bubble level 12, first board 3 and second board 1, simple structure uses easy operation, need not the operation that extra adjustment calibration first board 3 and second board 1 are parallel. The matching precision of the sliding block and the linear guide rail 15 manufactured in the prior art can realize that the first plate 3 moves along the linear guide rail 15, and the upper surfaces of the first plate 3 and the bottom plate 16 can be kept vertical; while the second board 1 is fixed on the detection device, therefore the first board 3 and the second board 1 need not extra regulation and can keep parallel, guarantee the utility model discloses a detection accuracy guarantees simultaneously the utility model is used for the simple structure of the splint that detect. The utility model discloses a rotatory rotation that drives lead screw 7 of hand wheel 11 makes mobilizable first board 3 remove, drives digital display amesdial 5 simultaneously and removes, and clearance between the real-time adjustment board reaches and accords with the test requirement. The synchronous movement of the digital display dial indicator 5 and the first plate 3 can meet the requirement that the gap between the first plate 3 and the second plate 1 is adjusted to be 0.001mm, and the control precision is accurate. The screw thread fit of the screw holes of the screw rod 7 and the vertical plate 10 has a locking function on the first plate 3, the first plate 3 cannot move when being detected, a locking device for locking the sliding block and the linear guide rail 15 is not required to be additionally arranged, and meanwhile, the clearance adjustment is convenient. By adopting the linear guide rail 15 and the screw rod 7 for control, no clearance and no backlash exist in the using process. First board 3 and 1 clearance of second board detect through digital display amesdial support and digital display amesdial 5, and the clearance detects simple structure, and the area between digital display amesdial support make full use of riser 10 and the first board 3 does not increase the detection device volume, makes things convenient for 1 interval measurement of first board 3 and second board, does not influence simultaneously and detects test operation. Through linear guide 15, lead screw 7, first board 3 and second board 1 etc. setting, the utility model discloses can be used for the detection of 2 degrees of flexure of piston ring also can be used for the detection of thrust washer plane degree, be one kind can satisfy the general device of the detection demand of 2 kinds of products of degree of flexure of piston ring, thrust washer plane degree. The utility model relates to a detection apparatus for be used for piston ring flexure degree and thrust washer plane degree's simple structure uses portably, and the flexible operation detects the higher, the degree of accuracy height of precision.
Claims (7)
1. A device for detecting the deflection of a piston ring and the flatness of a thrust washer, comprising:
a base plate (16);
an adjusting foot (17) which is arranged on the bottom plate (16) and is positioned at the lower side of the bottom plate (16);
a bubble level (12) mounted on the base plate (16);
a linear guide (15) mounted on the upper surface of the base plate (16);
a slider mounted on the linear guide (15);
a first plate (3) mounted on the slider;
the second plate (1) is arranged on the bottom plate (16) and corresponds to the first plate (3), and the surface of the second plate (1) facing the first plate (3) is parallel to the surface of the first plate (3) facing the second plate (1) and is vertical to the upper surface of the bottom plate (16);
the vertical plate (10) is arranged on the bottom plate (16), and a threaded hole is formed in the vertical plate (10);
the screw rod (7) is connected with the threaded hole, and one end of the screw rod (7) is connected with the first plate (3) through a bearing (4);
a hand wheel (11) connected with the other end of the screw rod (7);
the digital display dial indicator support is arranged on the bottom plate (16) and comprises a third plate (14) connected with the linear guide rail (15), a support rod (9) connected with the third plate (14), a polished rod (8) connected with the support rod (9) through a cross rod frame I (13), and a cross rod frame II (6) connected with the polished rod (8);
and the digital display dial indicator (5) is arranged on the second cross rod frame (6), and the digital display dial indicator (5) is positioned between the vertical plate (10) and the first plate (3) and arranged corresponding to the first plate (3) and is used for measuring the gap between the first plate (3) and the second plate (1).
2. The device for detecting the degree of deflection of the piston ring and the flatness of the thrust washer as claimed in claim 1, wherein the vertical plate (10), the digital dial indicator support, the first plate (3) and the second plate (1) are arranged in sequence.
3. A device for detecting the degree of deflection of a piston ring and the flatness of a thrust washer according to claim 1, wherein the two rod mounting holes of the first cross-bar frame (13) are perpendicular to each other, and the two rod mounting holes of the second cross-bar frame (6) are perpendicular to each other.
4. A device for detecting the deflection of piston rings and the flatness of thrust washers according to claim 1, characterized in that said first (13) and second (6) cross-bar carriers are gimbal-like cross-bar carriers.
5. A device for detecting the degree of deflection of piston rings and the flatness of thrust washers according to claim 1, characterized in that the bubble level gauge (12) is a circular bubble level gauge.
6. A device for detecting the degree of deflection of piston rings and the flatness of thrust washers according to claim 1, characterized in that the second plate (1) is bolted to the linear guide (15).
7. The detecting device for detecting the degree of deflection of the piston ring and the flatness of the thrust washer as claimed in claim 1, wherein the measuring end of the measuring rod of the digital dial indicator (5) contacts the first plate (3), and the digital dial indicator (5) is used for measuring the moving distance of the first plate (3) along the linear guide (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020183963.0U CN211147550U (en) | 2020-02-19 | 2020-02-19 | Detection device for detecting deflection degree of piston ring and flatness of thrust washer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020183963.0U CN211147550U (en) | 2020-02-19 | 2020-02-19 | Detection device for detecting deflection degree of piston ring and flatness of thrust washer |
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| Publication Number | Publication Date |
|---|---|
| CN211147550U true CN211147550U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020183963.0U Expired - Fee Related CN211147550U (en) | 2020-02-19 | 2020-02-19 | Detection device for detecting deflection degree of piston ring and flatness of thrust washer |
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| Country | Link |
|---|---|
| CN (1) | CN211147550U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112601409A (en) * | 2020-12-03 | 2021-04-02 | 无锡国悦电子科技有限公司 | Semiconductor various-component flow control cabinet with wire arranging structure |
| CN115823997A (en) * | 2022-12-09 | 2023-03-21 | 广东嘉元科技股份有限公司 | O-shaped ring diameter uniformity measuring device and measuring method thereof |
-
2020
- 2020-02-19 CN CN202020183963.0U patent/CN211147550U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112601409A (en) * | 2020-12-03 | 2021-04-02 | 无锡国悦电子科技有限公司 | Semiconductor various-component flow control cabinet with wire arranging structure |
| CN115823997A (en) * | 2022-12-09 | 2023-03-21 | 广东嘉元科技股份有限公司 | O-shaped ring diameter uniformity measuring device and measuring method thereof |
| CN115823997B (en) * | 2022-12-09 | 2023-06-23 | 广东嘉元科技股份有限公司 | O-shaped ring diameter uniformity measuring device and measuring method thereof |
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Granted publication date: 20200731 Termination date: 20210219 |