CN115436210A - Method for calibrating overall performance of accelerated polishing machine - Google Patents
Method for calibrating overall performance of accelerated polishing machine Download PDFInfo
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- CN115436210A CN115436210A CN202211174312.5A CN202211174312A CN115436210A CN 115436210 A CN115436210 A CN 115436210A CN 202211174312 A CN202211174312 A CN 202211174312A CN 115436210 A CN115436210 A CN 115436210A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a method for calibrating the whole performance of an accelerated polishing machine, which comprises the following steps: selecting 2 standard samples which are not subjected to a polishing test and are measured, respectively installing the standard samples at 1 and 8 positions of a road wheel, enabling one side of each standard sample with a mark to face outwards, and installing test pieces or simulation test pieces at other positions; installing a rubber wheel marked as C on an adjusting arm, and loading No. 30 brown corundum into a sand storage hopper; adjusting various parameters of the accelerated polishing machine to meet the requirements; when the revolution reaches n1 revolutions, the accelerated polishing machine is automatically stopped, the road wheel and the test piece are cleaned, and all residual brown corundum is removed; unloading the C-marked rubber wheel, replacing the C-marked rubber wheel with the X-marked rubber wheel, and loading No. 280 green silicon carbide into a sand storage hopper; when the revolution reaches n2 revolutions, the accelerated polishing machine is automatically stopped, the standard sample is taken out, the road wheel and the test piece are cleaned, and all residual green silicon carbide is removed; the polishing values of 2 standard samples after polishing by the accelerated polishing machine were measured, respectively.
Description
Technical Field
The invention relates to the technical field of an accelerated polishing machine, in particular to a method for calibrating the overall performance of the accelerated polishing machine.
Background
According to the relevant statistical data of the national statistical bureau, the total mileage of the highway in China reaches 519.81 ten thousand kilometers when the year is 2020, wherein the highway is 16.1 ten thousand kilometers and is located in the world first. In addition, according to related statistical data, traffic accidents occur more than 20 ten thousand times per year in nearly 5 years in China on average, and a large amount of personnel and property losses are caused. The reason is that the irregular driving behavior of the driver is a great aspect, and meanwhile, the continuous reduction of the anti-skid performance of the road surface is an important factor along with the continuous increase of the service life.
The skid resistance of a pavement is mainly determined by two aspects, wherein the grading determines the macrostructure of the pavement, and the aggregate surface roughness determines the microstructure of the pavement. In order to test the micro-roughness of the pavement surface layer and measure whether an aggregate meets the requirement of the anti-skid wearing layer of the asphalt pavement, a polishing value test is a representative detection method recognized at home and abroad. And the accelerated buffing machine is one of the main instruments in performing buffing value tests.
At present, the performance of the whole accelerated polishing machine is mainly verified according to the relevant standard requirements of JJJG (traffic) 054-2009 accelerated polishing machine verification regulations in China, but certain limitations exist in the actual verification execution:
(1) Certified standard test pieces are not easy to obtain;
(2) The materials used by the certified standard test pieces from different sampling stock yards have certain differences in various properties, and influence the final verification result to a certain extent;
(3) The verification process is complicated, the period is long, and the verification success rate is not high.
Disclosure of Invention
Therefore, the invention provides a method for accelerating the calibration of the whole performance of a polishing machine, which aims to solve the problems in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
according to a first aspect of the invention, a method for calibrating the overall performance of an accelerated polishing machine comprises the following steps:
s100, selecting 2 standard samples which are not subjected to polishing test and are measured, respectively installing the standard samples at 1 and 8 positions of a road wheel, wherein one side of each standard sample with a mark faces outwards, and installing test pieces or simulation test pieces at other positions;
step S200, installing a rubber wheel marked as C on an adjusting arm, and loading No. 30 brown corundum into a sand storage hopper;
step S300, adjusting various parameters of the accelerated polishing machine to meet requirements;
step S400, setting the number of revolutions to be n1 revolutions on a control panel, and pressing a power switch to start the accelerated polishing machine to start running;
step S500, when the revolution reaches n1 revolutions, the accelerated polishing machine is automatically stopped, the road wheel and the test piece are cleaned, and all residual brown fused alumina is removed;
s600, detaching the rubber wheel marked with the mark C, replacing the rubber wheel marked with the mark X, and loading No. 280 green silicon carbide into a sand storage hopper;
step S700, setting the revolution number on a control panel to be n2 revolutions, and pressing a power switch to start the acceleration polishing machine to start running;
step S800, when the revolution reaches n2 revolutions, the polishing machine is accelerated to automatically stop, a standard sample is taken out, the road wheel and the test piece are cleaned, and all residual green silicon carbide is removed;
and step S900, respectively measuring the polishing values of the 2 standard samples polished by the accelerated polishing machine.
Further, step S100 is preceded by: the room temperature was controlled at 20 ℃. + -. 2 ℃ 2h before and during the assay.
Further, n1=3200 in step S400 and step S500.
Further, step S400 includes activating the grit timing button and the water flow meter simultaneously.
Further, n2=6400 in step S700 and step S800.
Further, step S700 includes activating the fine sand governor button and the water flow meter simultaneously.
Further, the formula for calculating the difference between the standard sample before and after polishing in step S900 is as follows:
Δ＝PSV 0i a PSV 1i ；
In the formula:
delta is the difference value of the polishing values before and after the polishing value of the standard sample;
PSV 1i polishing value of a standard sample after polishing;
PSV 0i the pre-polishing value is the polishing value of the standard sample.
Further, the polished value of the standard sample after polishing was tested and compared with the PSV value before polishing to eliminate the introduction of uncertainty in measurement of the polished value due to abrasion of the rubber blade of the high-precision pendulum friction coefficient measuring device during the same test.
Furthermore, the PSV difference between the standard samples before and after the polishing test is 7-13, and the performance of the whole accelerated polishing machine can be qualified.
The invention has the following advantages: compared with the original verification method, the method has the advantages that the raw materials of the new standard test piece used by the improved method are easier to obtain, and the bottleneck problem of the current standard substance manufacturing is effectively solved. In addition, the compression resistance of the new standard test piece is better than that of the original standard test piece, and the phenomenon of test piece breakage can be reduced in the test process. Based on the new standard test piece, the improved verification method can reduce the original verification process which can be completed only in one day or even several days to several hours, and meanwhile, the success rate of verification can be greatly improved. The method improves the mode that the measurement result of the PSV is directly used for judging the performance verification result of the whole accelerated polishing machine in the original verification method, and the PSV difference of the standard test piece before and after the polishing test is used for judging, thereby eliminating the influence of uncertainty introduced in the measurement process of the pendulum friction coefficient tester.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
Fig. 1 is a flowchart of a method for accelerating calibration of overall performance of a grinder according to some embodiments of the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
And (3) accelerated polishing machine verification:
A. controlling the room temperature to be 20 +/-2 ℃ 2h before and during the verification;
B. 2 standard samples were selected which were not subjected to the burnishing test and were measured for completion. Respectively installing standard samples at the positions 1 and 8 of the road wheel, wherein one side of each standard sample with a mark faces outwards, namely the running direction of a rubber wheel on the polishing machine is consistent with the running direction of the standard sample of the sliding block, and installing test pieces or simulation test pieces at other positions;
C. installing a rubber wheel marked as C on an adjusting arm, and loading No. 30 brown corundum into a sand storage hopper;
D. adjusting various parameters of the accelerated polishing machine to meet the requirements;
E. setting the revolution number on a control panel to 3200 revolutions, pressing a power switch to start the acceleration polishing machine to start running, and simultaneously starting a coarse sand speed regulating button and a water flowmeter;
F. when the revolution reaches 3200 revolutions, the accelerated polishing machine is automatically stopped, the road wheel and the test piece are cleaned, and all residual brown corundum is removed;
G. unloading the C-marked rubber wheel, replacing the C-marked rubber wheel with the X-marked rubber wheel, and loading No. 280 green silicon carbide into a sand storage hopper;
H. setting the number of revolutions on a control panel to be 6400 revolutions, pressing a power switch to start the acceleration polishing machine to start running, and simultaneously starting a fine sand speed regulation button and a water flow meter;
I. when the revolution reaches 6400 revolutions, the accelerated polishing machine is automatically stopped, the standard sample is taken out, the road wheel and the test piece are cleaned, and all residual green silicon carbide is removed;
J. the polishing values of 2 standard samples polished by the accelerated polishing machine were measured, and the difference between the standard samples before and after polishing was calculated according to the following formula.
Δ＝PSV 0i A PSV 1i ；
In the formula:
delta is the difference value of the polishing values before and after the polishing value of the standard sample;
PSV 1i polishing value of a standard sample after polishing;
PSV 0i the pre-polishing value is the polishing value of the standard sample.
The calibration of the accelerated polishing machine can be completed by using a new method for improving the calibration of the accelerated polishing machine, using a new standard sample, and successively using 3200 revolutions of coarse sand polishing and 6400 revolutions of fine sand polishing. And testing the polishing value of the standard sample after polishing, and comparing the polishing value with the PSV value before polishing to eliminate the introduction of uncertainty of polishing value measurement caused by the abrasion of a rubber sheet of the high-precision pendulum friction coefficient measuring device in the same test process. The PSV difference between the standard samples before and after the polishing test is 7-13, and the performance of the whole accelerated polishing machine can be qualified.
Tracing the polishing quality value of the accelerated polishing machine: the grinding value of the test piece is measured by the high-precision pendulum friction coefficient measuring device, so that the accuracy of the overall performance verification of the polishing machine is accelerated and evaluated by the high-precision pendulum friction coefficient measuring device.
The angle, length, and mass criteria involved in the accelerated sander certification process are shown in table 1, according to national metrology standards.
Table 1 national measurement standards for angle, length, quality.
And the uncertainty of the polishing value measurement result of the standard sample in the process of accelerating the performance verification of the whole polishing machine is evaluated as follows:
U＝1.2，k＝2。
evaluation of acceptability of accelerated grinding machine grinding value the maximum allowable error of the difference between the PSV before grinding and the PSV after grinding of the standard sample was 10. + -.3. Therefore, the verification result of the method for improving the overall performance verification of the polishing machine can be judged to be accurate and credible.
The method for improving the calibration of the polishing machine has the advantages that: compared with the original verification method, the method for improving the performance verification of the whole polishing machine has the advantages as shown in Table 2.
Table 2 comparative results of the accelerated grinder test method.
Compared with the original verification method, the method has the advantages that the raw materials of the new standard sample used in the improved method are easier to obtain, and the bottleneck problem of the current standard substance manufacturing is effectively solved. In addition, the compression resistance of the new standard sample is better than that of the original standard sample, and the phenomenon of test piece breakage can be reduced in the test process. Based on the new standard sample, the improved verification method can reduce the original verification process which can be completed in one day or even several days to several hours, and can also greatly improve the success rate of verification. The method improves the mode that the measurement result of the PSV is directly used for judging the performance verification result of the whole accelerated polishing machine in the original verification method, and the PSV difference of the standard samples before and after the polishing test is used for judging, thereby eliminating the influence of uncertainty introduced by the measurement process of the pendulum friction coefficient measuring device.
In order to verify the effectiveness and feasibility of the improved method for detecting the overall performance of the accelerated polishing machine, 6 certified standard samples and new standard samples specified in jjjg (traffic) 054-2009 "calibration procedure for accelerated polishing machines" were used to respectively detect the overall performance of three accelerated polishing machines according to the corresponding detection processes, and the detection results are as follows.
Test environment room temperature 22 deg.C, humidity 85% RH, three accelerated polishing machines 1#, 2#, and 3# to be tested and a pendulum friction coefficient measuring device within the maximum allowable error are selected. Before the buffing test, the buffing values PSV of the standard sample made of the smectite andesite prescribed by JJG (traffic) 054-2009 and the new standard sample proposed herein made mainly of alumina ceramic 75-85%, sand (SiO 2) 15-25%, binder, etc. were measured, respectively, and the average values of the measurement results are shown in table 3.
Table 3 mean results of measurement of the polishing values PSV of the test pieces before the polishing test.
Firstly, calibrating an accelerated polishing machine by using a standard sample made of triclosan andesite according to JJG (traffic) 054-2009 accelerated polishing machine calibration rules, carrying out two parallel tests, and after the tests are finished, measuring the PSV of a test piece by using a pendulum type friction coefficient measuring device, wherein the measured value results are shown in Table 4.
Table 4 rubs value PSV measurement results of the standard samples of the mossbane rock.
As can be seen from table 4, the PSV measurement results of the three standard samples of the accelerated polishing machine all meet the regulations 46 to 52 according to the relevant regulations of JJG (traffic) 054-2009 "calibration procedure for accelerated polishing machine", and therefore, the overall accuracy of the three accelerated polishing machines is determined to be acceptable.
Table 5 results of measured values of the polished value PSV of the new standard sample of the modified method.
Then, the three accelerated polishing machines were calibrated according to the overall machine accuracy calibration procedure using the improved method proposed herein, and the prepared new standard sample was used, and then parallel tests were performed twice using coarse sand polishing 3200 revolutions and fine sand polishing 6400 revolutions, and after the tests were completed, the PSV values of the new standard sample were measured, and the results are shown in table 5. It can be seen that the PSV measurements for the three new standards for accelerated buffing machines ranged from 61 to 64 according to the procedure set forth in the accelerated buffing machine calibration modification method presented herein.
The results of calculating the difference between the mean value of the grinding values PSV of the test pieces in the parallel tests in tables 4 and 5 and the PSV of the test pieces before grinding are shown in Table 6.
Table 6 compares the results of the difference between the polishing values PSV of the test pieces before and after polishing.
From the results in table 6, it can be seen that, according to the regulations related to jjjg (transportation) 054-2009, even though the uncertainty caused by the measurement of the pendulum friction coefficient measuring device is introduced during the multiple tests using the green-shade chemical andesite, the PSV difference range of the test piece before and after the multiple polishing tests is still maintained within the range of 26 to 29. Therefore, in order to eliminate the influence on the verification result caused by the uncertainty introduced by using verification equipment in the verification process of the accelerated polishing machine, the improved method judges whether the overall performance of the accelerated polishing machine is qualified or not through the PSV difference value of the standard samples before and after the polishing test. According to the results shown in table 6, the PSV difference range of the new standard sample used in the improved method before and after the polishing test is 7 to 13, which meets the calibration standard of the whole machine accuracy of the accelerated polishing machine proposed by the regulations, and thus the whole machine accuracy of the three accelerated polishing machines can be determined to be qualified.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.
Claims (9)
1. A method for calibrating the performance of a whole accelerated polishing machine is characterized by comprising the following steps:
s100, selecting 2 standard samples which are not subjected to polishing test and are measured, respectively installing the standard samples at 1 and 8 positions of a road wheel, wherein one side of each standard sample with a mark faces outwards, and installing test pieces or simulation test pieces at other positions;
s200, mounting a rubber wheel marked as C on an adjusting arm, and loading No. 30 brown corundum into a sand storage hopper;
step S300, adjusting various parameters of the accelerated polishing machine to meet requirements;
step S400, setting the number of revolutions to be n1 revolutions on a control panel, and pressing a power switch to start the accelerated polishing machine to start running;
step S500, when the revolution reaches n1 revolutions, accelerating the polishing machine to automatically stop, cleaning the road wheel and the test piece, and removing all residual brown corundum;
s600, detaching the C-marked rubber wheel, replacing the C-marked rubber wheel with an X-marked rubber wheel, and loading No. 280 green silicon carbide into a sand storage hopper;
step S700, setting the revolution number on a control panel to be n2 revolutions, and pressing a power switch to start the acceleration polishing machine to start running;
step S800, when the revolution reaches n2 revolutions, the polishing machine is accelerated to automatically stop, a standard sample is taken out, the road wheel and the test piece are cleaned, and all residual green silicon carbide is removed;
and step S900, respectively measuring the polishing values of the 2 standard samples polished by the accelerated polishing machine.
2. The method for calibrating the overall performance of an accelerated grinding machine according to claim 1, wherein step S100 is preceded by the steps of: the room temperature was controlled at 20 ℃. + -. 2 ℃ 2h before and during the assay.
3. The method for calibrating the overall performance of an accelerated polishing machine as claimed in claim 1, wherein n1=3200 in step S400 and step S500.
4. The method for calibrating the overall performance of an accelerated grinding machine as recited in claim 3, wherein step S400 further comprises activating the grit speed button and the water flow meter simultaneously.
5. The method for calibrating the overall performance of the accelerated polishing machine as claimed in claim 4, wherein n2=6400 in step S700 and step S800.
6. The method for calibrating the overall performance of an accelerated polishing machine as claimed in claim 5, wherein step S700 further comprises activating the fine sand speed-adjusting button and the water flow meter simultaneously.
7. The method for calibrating the overall performance of an accelerated polishing machine as claimed in claim 1, wherein the formula for calculating the difference between the standard sample before and after polishing in step S900 is as follows:
Δ＝PSV 0i a PSV 1i ；
In the formula:
delta is the difference value of the polishing values before and after the polishing value of the standard sample;
PSV 1i polishing value of a standard sample after polishing;
PSV 0i the pre-polishing value is the polishing value of the standard sample.
8. The method of claim 7 wherein the measured polishing value of the standard sample after polishing is compared with the PSV value before polishing to eliminate the introduction of uncertainty in measurement of polishing value due to wear of the rubber sheet of the high-precision pendulum type friction coefficient measuring device during the same test.
9. The method as claimed in claim 8, wherein the PSV of the standard sample before and after the polishing test is 7-13, which means that the performance of the entire accelerated polishing machine is qualified.
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