CN113739725A - Flatness measuring instrument and method - Google Patents
Flatness measuring instrument and method Download PDFInfo
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- CN113739725A CN113739725A CN202110890885.7A CN202110890885A CN113739725A CN 113739725 A CN113739725 A CN 113739725A CN 202110890885 A CN202110890885 A CN 202110890885A CN 113739725 A CN113739725 A CN 113739725A
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- 238000005259 measurement Methods 0.000 claims abstract description 52
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 238000001179 sorption measurement Methods 0.000 claims description 6
- 238000000691 measurement method Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 description 11
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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Abstract
The invention relates to the technical field of flatness measurement, in particular to a flatness measuring instrument and a method, which comprises the following steps: the device comprises a controller, a manipulator, a laser range finder and a measuring table for clamping a workpiece to be measured; the measuring table is positioned on a measuring station where at least one mechanical hand grabs and places the workpiece to be measured, each mechanical hand is used for grabbing and placing the workpiece to be measured on the measuring table from a blank position and is also used for controlling the mechanical hand to grab and place the workpiece which is qualified in measurement to a finished product position or grab and place the workpiece which is unqualified in measurement to a waste position; the measuring station is positioned on a measuring track of the laser range finder, and the laser range finder is used for measuring a distance value between the laser range finder and a workpiece to be measured on the measuring station; the controller is used for judging whether the workpiece to be measured is qualified or not according to the distance value measured by the laser range finder. The automation of each process of measuring the flatness of the workpiece can be realized, the measurement precision and the measurement efficiency are improved, and the labor cost is saved.
Description
Technical Field
The invention relates to the technical field of flatness measurement, in particular to a flatness measuring instrument and a flatness measuring method.
Background
The flatness of a machined workpiece is often required to be measured in machining to verify whether the product is qualified or not, most flatness measuring instruments are manually operated, the flatness measuring instruments are inconvenient to use, and the requirement on professional knowledge of an operator is high. At present, the traditional measuring methods mainly comprise several methods, the first method is to place a workpiece on a reference table, and people can judge whether the flatness of the workpiece is qualified by observing the gap between a measuring plate and the workpiece by naked eyes or by a method of adding a feeler gauge. The measuring method has low precision and large labor intensity; the second widely used tool for measuring flatness is a three-coordinate measuring instrument, which has strict requirements on environment, is not suitable for quality monitoring of products on a production site, has a great defect in measuring efficiency, has high requirements on professional knowledge and comprehensive quality of an operator, and is inconvenient to maintain; the third type is a laser flatness measuring instrument, in the prior art, the laser flatness measuring instrument usually comprises a test plane and a laser emitter positioned above the test plane, the laser emitter is required to be adjusted to be lifted up each time during detection, a test sample is placed on the test plane, and then the distance between the laser emitter and the test plane of the test sample is adjusted, so that the laser emitter needs to be lifted up to be replaced each time a product to be tested is replaced, the operation is inconvenient, and the measuring efficiency is low; the fourth is to install the laser head in the testboard below, and a plurality of laser heads are fixed, and this kind of many laser heads measuring apparatu is relatively costly, and the point of measurement is also limited, and measurement accuracy is lower.
Disclosure of Invention
The invention provides a flatness measuring instrument and a method, which solve the technical problem of low flatness measuring precision of a machined workpiece.
The present invention provides a flatness measuring instrument for solving the above technical problems, including: the device comprises a controller, a manipulator, a laser range finder and a measuring table for clamping a workpiece to be measured;
the measuring table is positioned on at least one measuring station for grabbing and placing workpieces by the mechanical hands, each mechanical hand is used for grabbing the workpiece to be measured from a blank position and placing the workpiece on the measuring table, and the measuring table is also used for controlling the mechanical hands to grab and place the qualified workpieces to be measured to a finished product position or grab and place the unqualified workpieces to be measured to a waste position;
the measuring station is positioned on a measuring track of the laser range finder, and the laser range finder is used for measuring a distance value between the laser range finder and a workpiece to be measured on the measuring station;
the controller is used for judging whether the workpiece to be measured is qualified or not according to the distance value measured by the laser range finder.
Optionally, the measuring instrument further comprises a frame, a first rotating shaft and a second rotating shaft which are parallel to each other are arranged on the frame, the measuring table is detachably connected with the first rotating shaft, the laser range finder is detachably connected with the second rotating shaft, and the first rotating shaft and the second rotating shaft are linked to realize that the laser range finder carries out spiral wiring on the surface of the workpiece to be measured so as to detect the flatness.
Optionally, the first rotating shaft and the second rotating shaft are vertical rotating shafts, a swing rod extends horizontally from the upper end of the second rotating shaft, the tail end of the swing rod is connected with the laser range finder, and the swing rod swings to enable the laser range finder to scan along the radial movement of the workpiece to be measured.
Optionally, a third rotating shaft parallel to the first rotating shaft is further disposed on the frame, and the third rotating shaft is fixedly connected to the manipulator.
Optionally, the measuring table comprises a pneumatic adsorption jig or a magnetic adsorption jig for fixing and loosening the workpiece to be measured.
Optionally, four of the manipulators are evenly distributed around the measuring table.
The invention also provides a flatness measuring method, which comprises the following steps:
s1, grabbing the workpiece to be measured by the manipulator and placing the workpiece on a measuring table for fixing;
s2, starting the laser range finder to measure the flatness of the surface of the workpiece to be measured;
and S3, after measurement, grabbing and placing the qualified workpieces at the finished grade by the manipulator, or grabbing and placing the unqualified workpieces at the waste grade by the manipulator.
Optionally, the S1 specifically includes:
s11, inputting the technological parameter values of the workpiece to be measured into the controller through the human-computer interface; the process parameters include diameter and thickness;
s12, adjusting the second rotating shaft to make the laser range finder align with the measuring table to measure the reference position;
and S13, the manipulator grabs the workpiece to be measured at the blank position and places the workpiece on the measuring table.
Optionally, the S2 specifically includes: the laser range finder is driven to move to the center from the edge of the workpiece to be measured through the second rotating shaft, the first rotating shaft is controlled to drive the workpiece to be measured to rotate simultaneously, so that all measuring points of the laser range finder on the workpiece to be measured form a spiral line, the controller records data of the measuring points measured by the laser range finder in real time, and the flatness of the workpiece to be measured is calculated.
Optionally, the flatness P-H1, H- (a/32767-20-4) 8/16+26, H1-L-D +/Δ D;
h is a measurement engineering value, A is an AD value read by the controller, H1 is a measurement reference value, L is a distance value from the laser range finder to the measurement table, D is the thickness of the workpiece to be measured, and Delta D is thickness compensation.
Has the advantages that: the invention provides a flatness measuring instrument and a method, comprising the following steps: the device comprises a controller, a manipulator, a laser range finder and a measuring table for clamping a workpiece to be measured; the measuring table is positioned on a measuring station where at least one mechanical hand grabs and places the workpiece to be measured, each mechanical hand is used for grabbing and placing the workpiece to be measured on the measuring table from a blank position and is also used for controlling the mechanical hand to grab and place the workpiece which is qualified in measurement to a finished product position or grab and place the workpiece which is unqualified in measurement to a waste position; the measuring station is positioned on a measuring track of the laser range finder, and the laser range finder is used for measuring a distance value between the laser range finder and a workpiece to be measured on the measuring station; the controller is used for judging whether the workpiece to be measured is qualified or not according to the distance value measured by the laser range finder. The automation of each process of measuring the flatness of the workpiece can be realized, the measurement precision and the measurement efficiency are improved, and the labor cost is saved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic flow chart of a flatness measuring method according to the present invention;
FIG. 2 is a schematic structural diagram of the flatness measuring apparatus of the present invention;
FIG. 3 is a schematic view of the stations of the flatness measuring apparatus of the present invention;
FIG. 4 is a schematic diagram of the operation of the flatness measuring apparatus of the present invention;
fig. 5 is a cloud chart of the measurement points of the surface of the workpiece after the measurement by the flatness measurement method of the present invention is finished.
Description of reference numerals: the device comprises a finished product grade 1, a blank position 2, a measuring table 3, a second shaft 4, a manipulator 5, a first shaft 6, a third shaft 7 and a laser range finder 8.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 5, the present invention provides a flatness measuring instrument, including: the device comprises a controller, a manipulator 5, a laser range finder 8 and a measuring table 3 for clamping a workpiece to be measured; the measuring table 3 is positioned on a measuring station where the at least one mechanical arm 5 grabs and places the workpiece to be measured on the measuring table 3, and each mechanical arm 5 is used for grabbing and placing the workpiece to be measured on the blank position 2 and is also used for controlling the mechanical arm 5 to grab and place the qualified workpiece to be measured on the finished product position 1 or grab and place the unqualified workpiece to be measured on the waste product position.
The measuring station is positioned on the measuring track of the laser range finder 8, and the laser range finder 8 is used for measuring the distance value between the laser range finder 8 and a workpiece to be measured on the measuring station; the controller is used for judging whether the workpiece to be measured is qualified or not according to the distance value measured by the laser range finder 8. The automation of each process of measuring the flatness of the workpiece can be realized, the measurement precision and the measurement efficiency are improved, and the labor cost is saved.
Optional scheme, be equipped with first rotation axis 6 and second rotation axis 4 that are parallel to each other in the frame, the measuring table 3 with the connection can be dismantled to first rotation axis 6, laser range finder 8 with the connection can be dismantled to second rotation axis 4, first rotation axis 6 and the linkage of second rotation axis 4 are walked the line in order to realize that laser range finder 8 carries out the spiral on the surface of the work piece that awaits measuring with detection plane degree. And a third rotating shaft 7 parallel to the first rotating shaft 6 is further arranged on the rack, and the third rotating shaft 7 is fixedly connected with the manipulator 5. The three rotating shafts are parallel and are matched with each other for linkage, and the three rotating shafts are staggered and abducted in height space to avoid collision. Before measurement, in order to realize flatness measurement, a reference needs to be calibrated and a series of measurement parameter setting interfaces are given. Including measuring the diameter, thickness, measurement mode, process criteria, etc. of the workpiece. Calibration reference method: the second rotation axis 4 is moved to the laser head of the laser distance measuring device 8 to align with the first rotation axis 6, then the reference 1 is pressed, then the second rotation axis 4 is reset, and after the second rotation axis 4 is reset, the reference 2 is pressed, and the controller stores the two reference values for subsequent flatness calculation. And after the input workpiece parameters and the reference calibration are finished, the third rotating shaft 7 and the second rotating shaft 4 are zeroed. Then the system will automatically take measurements as the cycle starts. If the measurement data is to be saved, the USB flash disk is mounted before measurement.
In one specific embodiment, the workpiece to be measured is a saw blade to be measured. The manipulator 5 is used for grabbing the saw bit to be measured to carry the saw bit to the measuring station, and after the measurement is finished, the manipulator 5 carries the saw bit to the finished grade 1 or the waste grade. In order to improve the testing efficiency, four manipulators 5 are designed and respectively positioned above the blank position 2, the measuring position, the finished product position 1 and the waste product position, and the four stations are distributed on the circumference, so that the four manipulators 5 are also distributed on the circumference. The manipulator 5 rotates around the circle center of the measuring table 3, the stations where the manipulator is located are switched, and the saw blade is conveyed. The longitudinal displacement of the manipulator 5 is controlled by a cylinder, and the station where the manipulator 5 is rotationally switched is controlled by a servo motor. The manipulator 5 descends to the saw bit position, is equipped with the electro-magnet on the manipulator 5, and on magnet adsorbs the saw bit to the manipulator 5, when the controller detected that there is the saw bit on the manipulator 5, the control cylinder upwards moves, and after the operation targets in place, the servo motor of controlling again with 5 horizontal migration of manipulator to measuring station top, then the cylinder of controlling again, place the saw bit on measuring station's the testboard. After the measurement is finished, the saw blade is placed to the finished product position 1 or the waste grade according to the measurement result and the control method. Get the blank saw bit or place the saw bit when, four manipulators 5 can move simultaneously according to the saw bit condition on every manipulator 5, for example, when the manipulator 5 decline of blank position 2 got the saw bit, it remains to survey the saw bit to grab on the manipulator 5 of measurement position top, at this moment, the manipulator 5 of measuring the position top also can descend, will await measuring the saw bit and place the measurement position, and on the same reason, if become to have finished product or waste product on the manipulator 5 of grade 1 and waste product position top just in time, also can descend and place the saw bit. Therefore, the testing efficiency is greatly improved.
Optionally, the first rotating shaft 6 and the second rotating shaft 4 are vertical rotating shafts, a swing rod is horizontally extended from the upper end of the second rotating shaft 4, the tail end of the swing rod is connected with the laser range finder 8, and the swing rod swings to enable the laser range finder 8 to scan along the radial movement of the workpiece to be measured. The flatness measuring instrument comprises three servo motors which are respectively called a third rotating shaft 7, a second rotating shaft 4 and a first rotating shaft 6, the third rotating shaft 7 drives four mechanical hands 5 to rotate, the station where the mechanical hands 5 are located is switched, for example, after the mechanical hands 5 above the blank position 2 grab workpieces, the third rotating shaft 7 rotates 90 degrees, and the mechanical hands 5 reach above the measuring position; the second rotating shaft 4 drives the mechanical arm 5 on the measuring table 3 to rotate, and further drives the edge of the laser ranging head workpiece to move to the center of the workpiece; the first rotating shaft 6 drives the measuring table 3 to rotate, and further drives the workpiece to be measured to rotate.
Optional scheme, measuring table 3 is used for measuring the plane degree of saw bit, the motor is equipped with to measuring table 3 below, the motor drives the test table rotatory in the measurement process, and then it is rotatory to drive the saw bit, manipulator 5 still is equipped with on the measuring table 3, manipulator 5 drives 8 horizontal migration of laser range finder, in the measurement process, manipulator 5 drives the top operation to the saw bit center of laser range finder head in the top at saw bit edge, the saw bit below the operation of laser range finder head is also rotatory when, the process control ware of operation is at the data of each point that the record laser head surveyed, the helix of picture is formed in the distribution of these points on the saw bit, these points have covered whole saw bit of even basically, can be more accurate the plane degree of whole saw bit of reaction.
The specific process of measurement is as follows: the manipulator 5 gets the saw bit that awaits measuring from blank position 2, the rotatory 90 degrees of third rotation axis 7, the manipulator 5 that has snatched the saw bit reachs and measures the position, place the saw bit to measuring table 3, second rotation axis 4 drives laser rangefinder head and reachs the assigned position and begin to measure, in the measurement process, second rotation axis 4 continues the operation, first rotation axis 6 takes the saw bit rotatory simultaneously, the controller will be measured data and the audio-visual demonstration in position of measuring the saw bit on human-computer interface when the measurement. After the measurement is finished, the controller calculates that the current saw blade is a qualified saw blade or an unqualified saw blade, the measured saw blade is taken by the manipulator 5, and then the third rotating shaft 7 rotates and places the saw blade to the finished product position 1 or the waste grade.
Optionally, the measuring table 3 includes a pneumatic adsorption jig or a magnetic adsorption jig for fixing and releasing the workpiece to be measured. Other clamping modes can also be adopted, and are not limited and described in detail herein.
As shown in fig. 1, an embodiment of the present invention further provides a flatness measuring method, including the following steps:
s1, grabbing the workpiece to be measured by the manipulator 5 and placing the workpiece on the measuring table 3 for fixing;
s2, starting the laser range finder 8 to measure the flatness of the surface of the workpiece to be measured;
and S3, after measurement, grabbing and placing the qualified workpieces at the grade 1 or not grabbing and placing the unqualified workpieces at the waste grade by the manipulator 5.
In one particular implementation scenario:
(1) inputting process parameter values such as the diameter, the thickness and the like of a workpiece to be detected into a controller through a human-computer interface;
(2) adjusting the second rotating shaft 4 to enable the laser range finder 8 to be aligned to the test bench, measuring a reference position, and recording a reference value by the controller;
(3) the manipulator 5 grabs the workpiece to be measured at the blank position 2 and places the workpiece on the measuring table 3;
(4) the second rotating shaft 4 drives the laser ranging head to move from the edge of the workpiece to the center of the workpiece, the first rotating shaft 6 drives the workpiece to rotate at the moment, the laser ranging head transmits data of all measured points to the controller in the process, the points form a spiral line on the workpiece, and the controller calculates the flatness of the workpiece according to the data of the points, wherein the specific calculation method comprises the following steps:
flatness P-H1, H-a (a/32767-20-4) 8/16+26, H1-L-D +/Δ D;
h is a measurement engineering value, H is a conversion formula (AD value), H1 is a measurement reference value, H1 is a measurement reference value, L is a distance value from the laser distance meter 8 to the measurement table 3, D is a thickness of the workpiece to be measured, and Δ D is thickness compensation.
Data processing logic in the measurement process: at the zero point position of the second rotation axis 4, the reference is recalculated; and judging whether the first measured workpiece difference point is within the range of +/-0.1, and if so, determining the value as a thickness compensation value. And judging the following measurement data when the thickness compensation value is not 0. If the difference value of the workpiece measured at present and the difference value of the workpiece measured at last time are smaller than the allowable mutation value (can be set), the method is effective; if the current measured value is larger than the allowable mutation value but smaller than 0.15, the current measured value is invalid, and the last measurement is acquired as the current measured value; (to avoid measurement inaccuracies caused by the laser head striking the edge of the hole in the workpiece); if greater than 0.15, the value of the current point and the measured data from N1 points before and N2 points after the current point are all invalidated, which are all equal to the data from a point one before the N1 point. (N1 and N2 are empirical values from extensive testing in order to avoid measurement inaccuracies caused by holes in the workpiece).
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; the present invention may be readily implemented by those of ordinary skill in the art as illustrated in the accompanying drawings and described above; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. A flatness measuring instrument, comprising: the device comprises a controller, a manipulator, a laser range finder and a measuring table for clamping a workpiece to be measured;
the measuring table is positioned on at least one measuring station for grabbing and placing workpieces by the mechanical hands, each mechanical hand is used for grabbing the workpiece to be measured from a blank position and placing the workpiece on the measuring table, and the measuring table is also used for controlling the mechanical hands to grab and place the qualified workpieces to be measured to a finished product position or grab and place the unqualified workpieces to be measured to a waste position;
the measuring station is positioned on a measuring track of the laser range finder, and the laser range finder is used for measuring a distance value between the laser range finder and a workpiece to be measured on the measuring station;
the controller is used for judging whether the workpiece to be measured is qualified or not according to the distance value measured by the laser range finder.
2. The flatness measuring instrument according to claim 1, wherein the measuring instrument further comprises a frame, a first rotating shaft and a second rotating shaft which are parallel to each other are provided on the frame, the measuring table is detachably connected to the first rotating shaft, the laser distance measuring device is detachably connected to the second rotating shaft, and the first rotating shaft and the second rotating shaft are linked to realize that the laser distance measuring device performs spiral routing on the surface of the workpiece to be measured to detect flatness.
3. The flatness measuring instrument according to claim 2, wherein said first and second rotating shafts are vertical rotating shafts, a swing link is horizontally extended from an upper end of said second rotating shaft, a tip of said swing link is connected to said laser distance measuring device, and said swing link swings to make said laser distance measuring device scan along a radial direction of said workpiece to be measured.
4. The flatness measuring instrument according to claim 2, wherein a third rotation axis parallel to the first rotation axis is further provided on the frame, and the third rotation axis is fixedly connected to the robot.
5. The flatness measuring instrument according to claim 1, wherein said measuring table includes a pneumatic adsorption jig or a magnetic adsorption jig for fixing and releasing a workpiece to be measured.
6. The flatness gauge according to claim 1, wherein four of said manipulators are evenly distributed around said measuring table.
7. A flatness measuring method is characterized by comprising the following steps:
s1, grabbing the workpiece to be measured by the manipulator and placing the workpiece on a measuring table for fixing;
s2, starting the laser range finder to measure the flatness of the surface of the workpiece to be measured;
and S3, after measurement, grabbing and placing the qualified workpieces at the finished grade by the manipulator, or grabbing and placing the unqualified workpieces at the waste grade.
8. The flatness measuring method according to claim 7, wherein the S1 specifically includes:
s11, inputting the technological parameter values of the workpiece to be measured into the controller through the human-computer interface; the process parameters include diameter and thickness;
s12, adjusting the second rotating shaft to make the laser range finder align with the measuring table to measure the reference position;
and S13, the manipulator grabs the workpiece to be measured at the blank position and places the workpiece on the measuring table.
9. The flatness measuring method according to claim 8, wherein the S2 specifically includes: the laser range finder is driven to move to the center from the edge of the workpiece to be measured through the second rotating shaft, the first rotating shaft is controlled to drive the workpiece to be measured to rotate simultaneously, so that all measuring points of the laser range finder on the workpiece to be measured form a spiral line, the controller records data of the measuring points measured by the laser range finder in real time, and the flatness of the workpiece to be measured is calculated.
10. The flatness measurement method according to claim 9, wherein the flatness P-H1, H-H (a/32767 20-4) 8/16+26, H1-L-D +/Δ D;
h is a measurement engineering value, A is an AD value read by the controller, H1 is a measurement reference value, L is a distance value from the laser range finder to the measurement table, D is the thickness of the workpiece to be measured, and Delta D is thickness compensation.
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| CN117647192A (en) * | 2024-01-30 | 2024-03-05 | 山东恒力源精密机械制造有限公司 | Piston ring torsion degree detection method |
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| CN111141223A (en) * | 2019-11-15 | 2020-05-12 | 宜昌迪森智能科技有限公司 | Saw blade detection device and detection method thereof |
| CN112113517A (en) * | 2020-08-03 | 2020-12-22 | 河南熔金高温材料股份有限公司 | Method for detecting flatness of sliding plate brick |
| CN113029047A (en) * | 2021-02-08 | 2021-06-25 | 宜昌迪森智能科技有限公司 | Flatness detector and using method |
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| CN117647192A (en) * | 2024-01-30 | 2024-03-05 | 山东恒力源精密机械制造有限公司 | Piston ring torsion degree detection method |
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