CN114812485A - Large-size flat plate part flatness measuring device - Google Patents
Large-size flat plate part flatness measuring device Download PDFInfo
- Publication number
- CN114812485A CN114812485A CN202210516911.4A CN202210516911A CN114812485A CN 114812485 A CN114812485 A CN 114812485A CN 202210516911 A CN202210516911 A CN 202210516911A CN 114812485 A CN114812485 A CN 114812485A
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- displacement sensor
- motor
- guide rail
- measuring
- measurement
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 29
- 238000009434 installation Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000000691 measurement method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/30—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring roughness or irregularity of surfaces
Abstract
The invention discloses a flatness measuring device for a large-size flat part, which comprises a supporting system, a measured part positioning system, a measuring system, a moving system and an automatic control system. The core of the measuring system is a displacement sensor; the motion system comprises a rotation system and a moving system; the core of the automatic control system is a programmable controller. The invention adopts the displacement sensor and the linear guide rail which can realize the combined motion of circumference and radial direction, and reduces the error caused by movement by reducing the moving distance of the displacement sensor; and a high-precision tapered roller bearing is used as a vertical support of a rotating system, so that errors caused by rotation in the vertical direction are reduced. These all contribute to improving the accuracy of the measurement. The invention can realize the measurement of the layout of various measuring points such as concentric circles, spirals, radial directions or straight lines, can realize the flatness measurement of parts with larger size by prolonging the guide rail, has the characteristics of small volume, high efficiency, suitability for production sites and the like, and has wide application prospect.
Description
Technical Field
The invention belongs to the field of detection technology and automation devices, and relates to a large-size flat plate part flatness measuring device.
Background
Flatness is a measure of the shape error of a flat surface on a part. Flatness is one of the important indicators for evaluating the quality of measuring instruments and instruments, flat sliding bearings, plate glass, and the like. At present, there are many measuring tools, instruments and devices capable of measuring flatness, such as a flat crystal, a level meter, a three-coordinate measuring machine, a flatness measuring device based on a laser displacement sensor, etc., but these measuring tools, instruments and devices generally have the defects of low measuring precision, slow efficiency or small range, etc., which are difficult to overcome in principle or structure. For example, although the measurement accuracy of the optical flat based on the principle of interferometry can reach submicron level, the optical flat is not suitable for a large plane with the size larger than 250mm, and the efficiency is low; although the three-coordinate measuring machine can realize micron-scale measurement of flatness of planes with dimensions of hundreds of millimeters and even meter-scale, the three-coordinate measuring machine has the defects of low efficiency, large volume, inapplicability to production field measurement and the like; the flatness measuring device based on the laser displacement sensor can achieve micron-sized measuring accuracy, but for a plane with a larger size, one of a measuring head and a measured part of the instrument needs to move to realize the measurement of the whole plane. It is difficult to achieve micrometer-scale measurement accuracy at large dimensions of >200mm due to the large motion errors introduced by the manufacturing accuracy of the guide itself. With the requirements on the flatness measurement precision and efficiency of large-size flat plate parts being higher and higher, the existing flatness measurement instruments, instruments and devices are difficult to measure precision and efficiency and meet multiple requirements of a production field, and a measurement device capable of realizing the high flatness precision and efficiency of the large-size flat plate parts and being suitable for the production field is urgently needed.
Disclosure of Invention
In order to solve the problems, the invention provides a large-size flat plate part flatness measuring device. The technical scheme is as follows: a flatness measuring device for large-size flat plate parts comprises a supporting system, a measured part positioning system, a measuring system, a moving system and an automatic control system (not shown in the figure). The supporting system consists of a bottom plate 1, a stand column 2 and a top plate 3; the measured part positioning system consists of a ball head support 4, a positioning rod 5, a tray 6, an air cylinder 7 and an air cylinder mounting rack 8; the measuring system is composed of a displacement sensor 17 and an upper computer 34. The motion system is divided into a rotation system and a moving system, wherein the rotation system comprises a motor I9, a motor mounting rack I10, a coupling 11, a rotating shaft 12, a tapered roller bearing 27, a bearing seat 29 and a thrust washer 28; the moving system comprises a support frame 13, a motor II21, a motor mounting frame II14, a guide rail mounting plate 15, a guide rail 18, a sliding block 30, a sensor mounting plate 22, a sensor mounting frame 23, a tension spring 16, a rope 19, a driving wheel 20, an idler wheel 24, an idler wheel mounting frame 25 and a cotter pin 26. The automatic control system comprises a displacement sensor 17, a programmable controller 33 and an upper computer 34.
In the supporting system, a bottom plate 1 and a top plate 3 are respectively and fixedly connected with two ends of an upright post 2 through screws. In the part positioning system to be measured, a ball head support 4 and a positioning rod 5 are fixed in corresponding grooves on a bottom plate 1 through screws; the cylinder 7 is fixedly connected with the bottom plate 1 through a cylinder mounting frame 8; the tray 6 is fixedly connected with a push rod of the air cylinder 7 through a screw. In the rotating system, a motor mounting rack I10 is fixedly connected with the top plate 3 through screws; the motor I9 is fixedly connected with the motor mounting bracket I10 through screws; two ends of the coupler 11 are fixedly connected with an output shaft of the motor I9 and the rotating shaft 12 through screws respectively; the bearing seat 29 is fixedly connected with the top plate 3 through a screw; the thrust washers are mounted in grooves in the bearing blocks 29; the outer ring of the tapered roller bearing 27 is tightly matched with the bearing seat 29; the rotating shaft 12 is tightly matched with the inner ring of the tapered roller bearing 27; the rotating shaft 12 and the guide rail mounting plate 15 are fixedly connected with the support frame 13 through screws respectively. In the mobile system, a motor II21 is fixedly connected with a motor mounting rack II14 through a screw; the motor mounting rack II14, the guide rail 18 and the guide rail mounting plate 15 are fixedly connected through screws; the slide block 30 is matched with the guide rail 18 in a sliding way; the idler wheel mounting bracket 25 is fixedly connected to the far end of the guide rail 18 through screws; the driving wheel 20 is fixedly connected with an output shaft of the motor II 21; idler 24 is in rotational engagement with a shaft on idler mount 25; the cotter pin 26 is fixed in the hole on the shaft of the idler wheel mounting bracket 25; two ends of the rope 19 are fixedly connected with the driving wheel 20 and the sensor mounting plate 22 respectively and are positioned in a groove on the outer ring of the idle wheel 24; the sensor mounting plate 22 is fixedly connected with the sliding block 30 through screws; the sensor mounting plate 22 is fixedly connected with the sensor mounting frame 23 through screws; two ends of the tension spring 16 are respectively connected with a screw I31 on the guide rail mounting plate and a screw II32 on the guide rail mounting plate. In the measuring system, the displacement sensor 17 is fixedly connected with the sensor mounting plate 22 through screws and is in electrical signal connection with the upper computer 34. In the automatic control system, the displacement sensors 17 arranged at different positions are all in electric signal connection with the programmable controller 33, and the programmable controller 33 is in electric signal connection with the upper computer 34.
The invention has the advantages that: (1) the high-precision guide rail and the measuring mode that the displacement sensor can do combined motion in the circumferential direction and the radial direction are adopted, so that the moving distance of the displacement sensor can be reduced, and errors caused by movement are reduced; and a high-precision tapered roller bearing is used as a support of the rotating system in the vertical direction, so that errors caused by the rotation of the rotating system in the vertical direction are guaranteed. These all contribute to improving the accuracy of the measurement. (2) The circumference and radial combined motion mode of the displacement sensor can realize the measurement of the layout of various measuring points such as concentric circles, spirals, radial or straight lines and the like as required. (3) The flatness measurement of parts with larger sizes can be realized by prolonging the guide rail. (4) The volume is small, the measuring efficiency is high, and the device can be used in production fields. Therefore, the method has a good application prospect.
Drawings
Fig. 1 is a general structure diagram of a flatness measuring apparatus for large-sized flat plate parts according to the present invention.
FIG. 2 is a partial structural diagram of a positioning system for a part to be measured according to the present invention.
Fig. 3 is a partial structure diagram of a mobile system according to the present invention.
Fig. 4 is a view illustrating the installation of an idler pulley in the traveling system according to the present invention.
FIG. 5 is a top view of a device for measuring the flatness of a large-sized flat plate part according to the present invention.
Fig. 6 is a cross-sectional view a-a of fig. 5.
Fig. 7 is a perspective view of a rotational system according to the present invention.
Fig. 8 is a view showing the installation of the slider in the moving system according to the present invention.
Fig. 9 is a sampling point diagram of the spiral sampling point method in the measurement method according to the present invention.
Fig. 10 is a point diagram of a concentric circle point method in the measurement method according to the present invention.
Fig. 11 is a point diagram of a polar coordinate point method in the measurement method according to the present invention. Domestic picture right
Fig. 12 is a flow chart of a measurement method according to the present invention.
In the figure: 1. the device comprises a base plate, 2, a stand column, 3, a top plate, 4, a ball head support, 5, a positioning rod, 6, a tray, 7, an air cylinder, 8, an air cylinder mounting frame, 9, a motor I, 10, a motor mounting frame I, 11, a coupler, 12, a rotating shaft, 13, a support frame, 14, a motor mounting frame II, 15, a guide rail mounting plate, 16, a tension spring, 17, a displacement sensor, 18, a guide rail, 19, a rope, 20, a driving wheel, 21, a motor II, 22, a sensor mounting plate, 23, a sensor mounting frame, 24, an idler wheel, 25, an idler wheel mounting frame, 26, a cotter pin, 27, a tapered roller bearing, 28, a thrust washer, 29, a bearing seat, 30, a sliding block, 31, a screw I, 32, a screw II, 33, a programmable controller and 34, and an upper computer
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
Referring to fig. 1 and 2, before the large-size flatness measuring device starts working, the tray 6 in the measured part positioning system is at the highest position, and the ball support 4 and the positioning rod 5 can be adjusted according to the size of the measured part and locked at a specific position to adapt to the measured parts with different sizes. The part to be detected is placed on the tray 6 manually or automatically and limited by the positioning rod 5, so that the geometric center of the part is consistent with the center of the rotating system. The device is started, the automatic control system controls the air cylinder 7 to move downwards, and the part to be detected is in contact with the three ball supports 4 and is stably supported by the three ball supports. An ideal plane determined by the highest points of the three equal-height ball supports 4 is used as an evaluation plane for flatness measurement. At this time, the tray 6 is separated from the lower surface of the part to be measured. The rotation of the motor I9 drives the displacement sensor 17 to rotate by taking the output shaft of the motor I9 as the center; the rotation of the motor II21 drives the displacement sensor 17 to move along the guide rail 18 to the outside through the driving wheel 20 and the rope 19. Meanwhile, the displacement sensor 17 collects the height coordinate value of the measured point on the upper surface of the measured part. The mode of the combined movement of the circumference and the radial direction can realize the measurement of the layout of various measuring points such as concentric circles, spirals, radial directions or straight lines, and the number of the measured points can be freely set according to the requirement. After the data of all the measured points on the measured surface are obtained, the air cylinder 7 acts to jack the measured part, and the measured part can leave the detection position manually or automatically. Meanwhile, the motor II21 rotates reversely, and the displacement sensor 17 returns to the original position under the combined action of the tension spring 16 and the rope 19; and the upper computer 34 calculates the data according to the planeness evaluation principle and gives out the qualification judgment of the planeness of the part to be measured. Thus, the flatness measurement of a measured part is completed. The invention controls the movement of all moving parts and the detection of logic sequence, position or angle by an automatic control system according to a set program.
Referring to fig. 9, 10 and 11, the displacement sensor 17 of the present invention can acquire data by using a rotating system and a moving system to acquire points in a spiral point acquisition manner, a concentric point acquisition manner and a polar coordinate point acquisition manner, and the flatness can be calculated after the data is analyzed by an upper computer.
Referring to fig. 12, the upper computer of the present invention controls the programmable controller 33 to send out pulse signals to control the operation of the motor I9 and the motor II21 through software, the data measured by the displacement sensor 17 is output to the upper computer 34, and the upper computer 34 starts the next measurement after calculating the flatness of the measured part.
Claims (7)
1. A large-size flat part flatness measuring device comprises a supporting system composed of a bottom plate (1), an upright post (2) and a top plate (3), a measured part positioning system composed of a ball head support (4), a positioning rod (5) and a tray (6), a rotating system composed of a motor I (9), a motor mounting rack I (10), a coupler (11), a rotating shaft (12), a tapered roller bearing (27), a thrust washer (28) and a bearing seat (29), a moving system composed of a supporting frame (13), a motor II (21), a motor mounting rack II (14), a guide rail mounting plate (15), a guide rail (18), a sliding block (30), a sensor mounting plate (22), a sensor mounting rack (23), a tension spring (16), a rope (19), a driving wheel (20), an idler wheel (24) and an idler wheel mounting rack (25), and a programmable controller (33), The automatic control system comprises an automatic control system consisting of a motor I (9), a motor II (21) and a cylinder (7), and a measuring system consisting of a displacement sensor (26) and a data acquisition and processing system.
2. The measured part positioning system according to claim 1, wherein three equal-height ball supports (4) are mounted in grooves on the base plate (1) and can be adjusted to measured parts of different sizes through position adjustment.
3. A measuring system according to claim 1, characterized in that the displacement sensor (17) is attached to the slide (30) by means of screws and moves therewith.
4. The displacement system according to claim 1, characterized in that the slide (30) is driven on the guide rail (18) by a motor II (21) and a tension spring (16) for a bidirectional displacement.
5. The rotating system according to claim 1, wherein one end of the rotating shaft (12) is fixedly connected with the guide rail installation plate (15), the other end is fixedly connected with the output shaft of the motor I (9) through a coupling (11), the middle part is rotatably connected with the top plate (3) through a tapered roller bearing (27), and the positioning and the supporting in the vertical direction are realized through the tapered roller bearing.
6. A displacement sensor (17) according to claim 1, characterized in that it can be a non-contact laser displacement sensor, an eddy current displacement sensor, a capacitive displacement sensor or a contact displacement sensor.
7. The displacement sensor (17) of claim 1, wherein the point-taking mode can be a plurality of measuring point layouts such as concentric circles, spirals, radial directions or straight lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210516911.4A CN114812485A (en) | 2022-05-12 | 2022-05-12 | Large-size flat plate part flatness measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210516911.4A CN114812485A (en) | 2022-05-12 | 2022-05-12 | Large-size flat plate part flatness measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN114812485A true CN114812485A (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210516911.4A Pending CN114812485A (en) | 2022-05-12 | 2022-05-12 | Large-size flat plate part flatness measuring device |
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| Country | Link |
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| CN (1) | CN114812485A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115979203A (en) * | 2023-03-21 | 2023-04-18 | 山东金科电气股份有限公司 | Automatic flatness detection device for explosion-proof box explosion-proof plane |
-
2022
- 2022-05-12 CN CN202210516911.4A patent/CN114812485A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115979203A (en) * | 2023-03-21 | 2023-04-18 | 山东金科电气股份有限公司 | Automatic flatness detection device for explosion-proof box explosion-proof plane |
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