CN117054238A - Nondestructive type toughened glass tableware self-explosion hidden danger detection method and device - Google Patents
Nondestructive type toughened glass tableware self-explosion hidden danger detection method and device Download PDFInfo
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- CN117054238A CN117054238A CN202311308968.6A CN202311308968A CN117054238A CN 117054238 A CN117054238 A CN 117054238A CN 202311308968 A CN202311308968 A CN 202311308968A CN 117054238 A CN117054238 A CN 117054238A
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- 239000005341 toughened glass Substances 0.000 title claims abstract description 96
- 238000001514 detection method Methods 0.000 title claims abstract description 55
- 238000004880 explosion Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000012360 testing method Methods 0.000 claims description 10
- 239000002023 wood Substances 0.000 claims description 8
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 7
- 235000011613 Pinus brutia Nutrition 0.000 claims description 7
- 241000018646 Pinus brutia Species 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 7
- 238000002788 crimping Methods 0.000 claims description 3
- 238000013101 initial test Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000035882 stress Effects 0.000 description 34
- 239000002245 particle Substances 0.000 description 6
- 230000006355 external stress Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000005329 float glass Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
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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
- G01N3/02—Details
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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 nondestructive self-explosion hidden danger detection method and device for toughened glass tableware, which belong to the technical field of self-explosion detection of toughened glass, and further comprise an upper pressure gauge and a lower support column, wherein the lower support column is positioned below the upper pressure gauge, a pressure sensor is arranged on the lower support column, a support plate is arranged at the top end of the lower support column, more than three soft support legs are arranged on the support plate, and the self-explosion rate of the toughened glass tableware is judged according to the pressure difference between the pressure of the upper pressure gauge and the pressure of the pressure sensor. The method realizes the nondestructive detection of the self-explosion rate of the toughened glass tableware, avoids intentional break caused by measuring stress lines, can greatly improve the detection rate of the toughened glass tableware, and is beneficial to improving the detection accuracy.
Description
Technical Field
The invention belongs to the technical field of self-explosion detection of toughened glass, and particularly relates to a nondestructive type self-explosion hidden danger detection method and device for toughened glass tableware.
Background
The toughened glass tableware has the advantages of high strength, smooth surface, good crystal clear feeling and the like, is loved by people, gradually enters into a high-grade tableware array, and brings market opportunity for the production of the toughened glass tableware. After the float glass is heated to a softening point, the toughened glass tableware is molded and rapidly cooled to obtain toughened glass with balanced internal and external stress, so that the strength of the toughened glass tableware is enhanced, and the invention patent CN1792903A is particularly seen. However, the balance of internal and external stress of the toughened glass can be destroyed in the using process due to the unavoidable impurities of the float glass and the common toughening process, so that the self-explosion is caused.
In order to control the self-explosion probability of the toughened glass tableware, the inventor generally detects the toughened glass tableware before leaving the factory, and according to the production experience of the toughened glass for many years, the inventor proposes an invention patent application with the publication number of CN107632020A in the year 09 and 22, which overcomes the defects of complicated detection technology and expensive detection equipment in the prior art, and detects whether the toughened glass tableware is easy to self-explode or not by depending on the deviation degree of a stress line on the cross section of the toughened glass tableware relative to a central line, thereby providing convenient service for the detection of the toughened glass tableware at one time. However, the detection method needs to use the degree of deviation of the stress line relative to the central line when the detection is carried out in an enlarged view, so that the operation is complicated, and the toughened glass tableware needs to be broken so as to be watched from the cross section of the toughened glass tableware, thereby not only bringing a certain damage rate, but also controlling the damage rate, greatly reducing the sampling rate and further reducing the detection accuracy.
Accordingly, the applicant has sought a nondestructive testing method, and found that the difference between internal and external stresses of the tempered glass tableware is closely related to the degree of deviation of stress lines during the exploration process. When the pressure reaching the standard strength is simultaneously applied to the inner wall and the outer wall of the toughened glass tableware, if the internal pressure is larger than the external pressure, the stress line of the cross section of the toughened glass tableware is deviated to the outer wall side; if the internal pressure is smaller than the external pressure, the stress line of the cross section of the toughened glass tableware deviates to the inner wall side; and the greater the pressure difference, the greater the degree of deflection of the stress line. Through repeated experiments, the stress difference has high consistency, and the stress difference can completely reflect the offset direction and the offset degree of the stress line.
Disclosure of Invention
The invention aims to solve the technical problem of providing a nondestructive self-explosion hidden danger detection method and device for toughened glass tableware, which can realize nondestructive self-explosion detection of toughened glass by utilizing internal and external pressure differences.
In order to solve the technical problems, the technical scheme of the invention is as follows: the design of the nondestructive toughened glass tableware self-explosion hidden danger detection method comprises an upper pressure gauge, and further comprises a lower support column, wherein the lower support column is positioned below the upper pressure gauge, a pressure sensor is arranged on the lower support column, a support plate is arranged at the top end of the lower support column, and more than three soft support legs are arranged on the support plate, and the detection steps are as follows:
(1) Placing toughened glass tableware to be tested on the supporting legs, setting initial test times t=0, and setting total test times N;
(2) The upper pressure gauge is pressed down on the toughened glass tableware in the step (1), the pressure is applied to 25-30 MPa, the pressure of the upper pressure gauge is used as the first pressure, the pressure of the pressure sensor is subtracted by the auxiliary weight to be used as the second pressure, and the auxiliary weight is the static supporting force of the lower supporting column on the supporting plate and the supporting legs;
(3) Calculating the pressure difference between the first pressure and the second pressure obtained in the step (2), judging whether the absolute value of the pressure difference is smaller than 0.5 MPa, and if the absolute value of the pressure difference is larger than or equal to 0.5 MPa, the toughened glass tableware is easy to self-explode; if the absolute value of the pressure difference is smaller than 0.5 MPa, t=t+1, t is compared with N, and if t is larger than or equal to N, the toughened glass tableware is not easy to self-explode; if t < N, entering the step (4);
(4) And (3) replacing the crimping position of the pressure gauge on the toughened glass tableware, and repeating the steps (2) and (3) until the detection of one toughened glass tableware is completed.
Further, in the step (2), the falling speed of the upper pressure gauge when the upper pressure gauge applies pressure was 0.1 mm/s.
Further, in the step (2), the pressure is applied to 25-30 MPa, then the pressure is stabilized for 25-35 s, and then the second pressure is read.
Further, in the step (3), when the absolute value of the pressure difference is smaller than 0.3MPa, the self-explosion rate of the toughened glass tableware is lower.
Further, N is more than or equal to 2 and less than or equal to 8.
The invention also provides a nondestructive toughened glass tableware self-explosion hidden trouble detection device, which comprises an upper pressure gauge, and further comprises a lower support column, wherein the lower support column is positioned below the upper pressure gauge, a pressure sensor is arranged on the lower support column, a support plate is arranged at the top end of the lower support column, and more than three support legs are arranged on the support plate;
the upper pressure gauge applies a lower pressure according to an applied pressure set value of the controller;
or the controller collects the lower pressure applied by the upper pressure gauge, and when the lower pressure reaches the set value of the applied pressure, the upper pressure gauge is controlled to stop pressurizing;
the controller takes the lower pressure exerted by the upper pressure gauge as first pressure, the controller takes the pressure of the pressure sensor minus the auxiliary weight as second pressure, the auxiliary weight is the static supporting force of the lower supporting column to the supporting plate and the supporting legs, the controller calculates the pressure difference of the first pressure minus the second pressure, and the controller judges whether the detected part of the toughened glass tableware is easy to self-explode according to the absolute value of the pressure difference.
Further, the controller is a singlechip, control software is installed in the singlechip, and the control software comprises:
(1) And (3) a setting module: receiving the total test times N, an applied pressure set value and an upper limit of a pressure difference absolute value;
(2) And the acquisition module is used for: receiving signals of a pressure sensor and/or an upper pressure gauge;
(3) The logic control module: the upper pressure gauge is controlled to apply pressure according to an applied pressure set value or collect signals of the upper pressure gauge, the pressure applied by the upper pressure gauge is used as a first pressure, the auxiliary weight is subtracted from the pressure sensor signal in the collecting module to be used as a second pressure after the pressure stabilizing time is up, the pressure difference between the first pressure and the second pressure is calculated, and if the absolute value of the pressure difference is smaller than the upper limit of the absolute value of the pressure difference in the setting module, the measured part is not easy to self-explode; if the absolute value of the pressure difference is larger than or equal to the upper limit of the absolute value of the pressure difference in the setting module, the measured part is easy to self-explode; the auxiliary weight is the static supporting force of the lower supporting column to the supporting plate and the supporting legs;
(4) And an output module: outputting signal lamp or/and sound prompt according to the judging result of the logic control module, wherein the signal for automatically lighting the red lamp or/and the signal for driving the sound equipment are easy to be automatically exploded, and the signal for driving the green lamp to be lighted is not easy to be automatically exploded;
(5) And a display module: for outputting information in the display setting module, and absolute value information of the first pressure, the second pressure, and the pressure difference.
Further, the control software further includes a storage module: for storing information of the display module.
Further, the voltage stabilizing time of the logic control module is 25-35 s.
Further, the supporting legs are uniformly distributed along the circumferential direction of the center of the lower supporting column, and the center distance between two adjacent supporting legs is 3-5 cm.
Further, the supporting leg comprises a wood block, and an elastic sleeve is wrapped on the wood block.
Further, the wood block is pine with the Shore hardness of 560-600 HA, and the elastic sleeve is a rubber sleeve.
Further, the set value of the applied pressure is 25-30 MPa.
Further, the absolute upper limit of the pressure difference is 0.5 MPa.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the deviation degree of the stress line is reflected by detecting the pressure difference between the inner wall and the outer wall of the toughened glass, so that the nondestructive detection of the pressure difference replaces the breakage type detection of the detection stress line, the intentional breakage caused by the measurement of the stress line is avoided, the detection rate of the toughened glass tableware can be greatly improved, and the detection accuracy is improved.
2. Because the supporting plate is arranged on the lower supporting column below the upper pressure gauge, more than three soft supporting legs are arranged on the supporting plate, and the pressure sensors are arranged on the lower supporting column, when the toughened glass tableware is placed between the supporting legs and the upper pressure gauge for detection, on one hand, the lower part of the toughened glass tableware can form a suspended state, the interference of other supporting forces is avoided, and the accurate detection is facilitated; on the other hand, in the process of applying pressure to the upper pressure gauge, the soft supporting legs have a certain buffer effect on the toughened glass tableware, upward extrusion force on the toughened glass tableware is formed, a opposite pressure state is formed with the upper pressure gauge, then resultant force of the upper side pressure is reflected through the lower supporting column, and the measurement of internal and external stress difference of the toughened glass tableware is realized through the upper and lower pressures.
3. The controller adopts software to realize detection control, so that the structure of a peripheral hardware circuit is simplified, and the stability of a system is improved; and the processing rate of the data is improved, the detection result is quickly reflected, and meanwhile, the accuracy in the data processing process can be maintained.
4. Because the supporting leg adopts the structure of wrapping up the elastic sleeve at the billet, and the elasticity of elastic sleeve is greater than the softness of billet for toughened glass tableware is when receiving the pressure that the manometer applyed, and the supporting leg can give quick buffering, avoids causing stress concentration and damaging toughened glass tableware, then plays the effect of exerting ascending extrusion force through soft support, has both protected toughened glass tableware, has realized the application of downforce again.
5. The invention has novel conception, combines the production experience of the toughened glass tableware for years, discovers the correlation between the stress difference and the stress line deviation degree through repeated experiments by cutting and grinding, and obtains the nondestructive self-explosion detection by utilizing the correlation, thereby being convenient for popularization and application in industry.
Drawings
FIG. 1 is a schematic perspective view of a detection device;
FIG. 2 is a schematic diagram of a control architecture of the present invention;
fig. 3 is a control flow diagram of the program modules.
The marks in the figure: 1. a frame; 2. a pressure gauge is arranged; 3. a lower support column; 4. a support plate; 5. support legs; 6. a controller; 7. a pressure sensor.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
When the detection device is in a use state, one end close to the ground is defined as a lower end or a bottom end, and the other end far away from the ground is correspondingly defined as an upper end or a top end.
The main idea of the invention is that: by utilizing the correlation between the stress difference of the toughened glass tableware and the stress line distribution of the toughened glass tableware, the self-explosion rate of the toughened glass tableware is detected by detecting the stress difference of the toughened glass tableware, so that the nondestructive detection of the self-explosion rate of the toughened glass tableware is realized.
Example 1
From 5 batches of undetected toughened glass tableware with the thickness of 4mm and the diameter of 250mm (hereinafter referred to as small size), randomly 200 pieces in each batch form a sample group, and then 10 pieces are randomly extracted from the sample group; 10 pieces of toughened glass tableware with the thickness of 5mm and the diameter of 400mm (hereinafter referred to as large size) were extracted in the same manner. Such two samples of different specifications together constitute a test sample. For the same detection sample, after the positions of detection points are marked and marked on each detection sample by using a marker pen, the sizes of the marked points correspond to the pressing contact surface of the upper pressure gauge 2, and the pressure difference detection is carried out by using the detection equipment with the following structure.
The specific structure of the detection equipment is as follows: as shown in fig. 1, an upper pressure gauge 2 is installed on a frame 1, a lower support column 3 is arranged on the frame 1 below the upper pressure gauge 2, a pressure sensor 7 is arranged on the lower support column 3, a support plate 4 is arranged at the top end of the lower support column 3, three soft support legs 5 with equal height are arranged on the support plate 4, the support legs 5 are uniformly distributed along the circumferential direction of the lower support column 3, and the support legs 5 are of a structure of sleeving rubber sleeves on pine wood with shore hardness of 580 HA. As shown in fig. 2, the upper pressure gauge 2 applies a lower pressure according to a given value of the controller 6, the controller 6 takes the lower pressure applied by the upper pressure gauge 2 as a first pressure, the controller 6 also collects a pressure value of the pressure sensor 7, the pressure value of the sensor subtracts an auxiliary weight as a second pressure, and the auxiliary weight is a static supporting force of the lower supporting column 3 on the supporting plate 4 and the supporting leg 5, namely, the gravity of the supporting plate 4 and the supporting leg 5; and calculates the pressure difference of the first pressure minus the second pressure, and the controller 6 judges whether the detected part of the toughened glass tableware is easy to generate self-explosion or not according to the absolute value of the pressure difference.
The controller 6 is a single chip microcomputer, control software is installed in the single chip microcomputer, and the control software comprises program modules:
(1) And (3) a setting module: the total test times N, the set value of the applied pressure and the upper limit of the absolute value of the pressure difference are received. The first pressure ranges from 25 to 30MPa, and can be 25, 28 or 30 MPa; the upper limit of the absolute value of the pressure difference is preferably 0.5 MPa;
(2) And the acquisition module is used for: receiving a signal of a pressure sensor;
(3) The logic control module: the upper pressure gauge 2 is controlled to apply pressure according to the set value of the applied pressure, the pressure applied by the upper pressure gauge 2 is used as the first pressure, the second pressure is read after the pressure stabilizing time is up, the pressure difference between the first pressure and the second pressure is calculated, and if the absolute value of the pressure difference is smaller than the upper limit of the absolute value of the pressure difference in the setting module, the measured part is not easy to self-explode; if the absolute value of the pressure difference is larger than or equal to the upper limit of the absolute value of the pressure difference in the setting module, the measured part is easy to self-explode; the voltage stabilizing time is preferably 25-35 s, and can be 25, 30 or 35 s;
(4) And an output module: outputting signal lamp or/and sound prompt according to the judging result of the logic control module, wherein the signal for automatically lighting the red lamp or/and the signal for driving the sound equipment are easy to be automatically exploded, and the signal for driving the green lamp to be lighted is not easy to be automatically exploded;
(5) And a display module: the display device is used for outputting information in the display setting module and absolute value information of the first pressure, the second pressure and the pressure difference;
(6) And a storage module: for storing information of the display module.
The specific detection steps are shown in fig. 3:
(1) Placing the toughened glass tableware to be tested on the supporting legs, setting initial test times t=0, setting total test times N, and setting N as 4 for small-sized toughened glass tableware; for large toughened glass tableware, setting N to be 5;
(2) The upper pressure gauge is pressed down on the toughened glass tableware in the step (1), the descending speed of the upper pressure gauge is 0.1mm/s when the upper pressure gauge applies pressure, the pressure of the upper pressure gauge is taken as first pressure, and the second pressure is read after the pressure stabilizing time of the first pressure is up;
(3) Calculating the pressure difference between the first pressure and the second pressure obtained in the step (2), judging whether the absolute value of the pressure difference is smaller than 0.5 MPa, and if the absolute value of the pressure difference is larger than or equal to 0.5 MPa, the toughened glass tableware is easy to self-explode; if the absolute value of the pressure difference is smaller than 0.5 MPa, t=t+1, t is compared with N, and if t is larger than or equal to N, the toughened glass tableware is not easy to self-explode; if t < N, entering the step (4);
(4) And (3) replacing the crimping position of the pressure gauge on the toughened glass tableware, and repeating the steps (2) and (3) until the detection of one piece of toughened glass tableware is completed.
The test results are shown in Table 1:
TABLE 1
After the pressure difference of the sample is detected, the offset of the stress line on the section of the toughened glass tableware at the mark point is measured by using the method described in the patent of the invention with the publication number of CN107632020A, if the mark point is positioned on one toughened glass particle, the offset of the stress line on the toughened glass particle is taken as the offset of the stress line of the mark point, and if the mark point is positioned on more than two toughened glass particles, the average value of the offsets of the stress lines of the toughened glass particles at the mark point is taken as the offset of the stress line of the mark point, and the maximum offset of the stress line on the toughened glass particle is taken as the offset of the stress line of the toughened glass particle. The detection results are shown in Table 2:
TABLE 2
In the process of observing the stress line, the stress difference exists at the marked point, the stress line deviates towards the side with smaller pressure value, the stress line is centered, and the stress line is free from the pressure difference; and when the absolute value of the pressure difference is within 0.3MPa, the toughened glass tableware is less prone to self-explosion. The degree of deviation of the stress line is completely related to the magnitude of the pressure difference, the two detection results also have high consistency, and the degree of deviation of the stress line can be completely reflected by the magnitude of the pressure difference.
Example two
5 batches of small-size and large-size toughened glass tableware produced in workshops are randomly selected respectively, 2000 samples are randomly selected from each batch, and the experiment is carried out on 20000 samples. The 20000 samples are divided into two groups in average according to batches, and the self-explosion condition is detected by adopting two methods respectively.
The test results obtained by the method of the present invention are shown in Table 3 below:
TABLE 3 Table 3
The results of the detection using the method described in the patent publication CN107632020a are shown in table 4 below:
TABLE 4 Table 4
From the results, the self-explosion rate detected by the method has extremely high coincidence degree with the self-explosion rate detected by the stress line offset, and can be fully applied to practice.
In the above embodiment, the number of the supporting legs may be 3-8, and the specific number may be 3, 4, 5, 6, 7 or 8, and may be adjusted according to actual needs, so that the center distance between two adjacent supporting legs is 3-5 cm, so long as the supporting of the toughened glass tableware can be realized. The shore hardness of pine can be any value between 560 and 600HA besides 580HA, that is to say, the specific shore hardness of pine can be any value within the range, and the condition of moderate hardness can be achieved as long as the specific shore hardness is within the range. Of course, the pine can be replaced by wood blocks made of other materials, and the pine can also be provided with a certain degree of softness. The controller 6 can also collect the lower pressure exerted by the upper pressure gauge, and when the lower pressure reaches a set value, the upper pressure gauge is controlled to stop pressurizing, so that the purpose of controlling the first pressure can be achieved.
The stress difference detection position of the toughened glass tableware can be set to be 2-8 positions, namely the total test times of the toughened glass tableware are 2-8, specifically can be 2, 3, 4, 5, 6, 7 or 8, and the like, and can be adjusted according to the size of the toughened glass tableware.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The nondestructive self-explosion hidden danger detection method for the toughened glass tableware comprises an upper pressure gauge and is characterized in that: still include the lower support column, the lower support column is located the below of last manometer, is equipped with pressure sensor on the lower support column, and the top of lower support column is equipped with the backup pad, is equipped with the supporting leg more than three in the backup pad, and the detection step is as follows:
(1) Placing toughened glass tableware to be tested on the supporting legs, setting initial test times t=0, and setting total test times N;
(2) The upper pressure gauge is pressed down on the toughened glass tableware in the step (1), the pressure is applied to 25-30 MPa, the pressure of the upper pressure gauge is used as the first pressure, the pressure of the pressure sensor is subtracted by the auxiliary weight to be used as the second pressure, and the auxiliary weight is the static supporting force of the lower supporting column on the supporting plate and the supporting legs;
(3) Calculating the pressure difference between the first pressure and the second pressure obtained in the step (2), judging whether the absolute value of the pressure difference is smaller than 0.5 MPa, and if the absolute value of the pressure difference is larger than or equal to 0.5 MPa, the toughened glass tableware is easy to self-explode; if the absolute value of the pressure difference is smaller than 0.5 MPa, t=t+1, t is compared with N, and if t is larger than or equal to N, the toughened glass tableware is not easy to self-explode; if t < N, entering the step (4);
(4) And (3) replacing the crimping position of the pressure gauge on the toughened glass tableware, and repeating the steps (2) and (3) until the detection of one toughened glass tableware is completed.
2. The method for detecting the hidden danger of self-explosion of the nondestructive toughened glass tableware according to claim 1, which is characterized by comprising the following steps: in the step (2), the falling speed of the upper pressure gauge when pressure is applied is 0.1 mm/s.
3. The method for detecting the hidden danger of self-explosion of the nondestructive toughened glass tableware according to claim 1 or 2, which is characterized by comprising the following steps of: in the step (2), the pressure is applied to 25-30 MPa, then the pressure is stabilized for 25-35 s, and then the second pressure is read.
4. A detection device for realizing the method for detecting the hidden danger of self-explosion of the nondestructive toughened glass tableware according to any one of claims 1 to 3, comprising an upper pressure gauge, and characterized in that: the pressure sensor is arranged on the lower support column, a support plate is arranged at the top end of the lower support column, and more than three support legs are arranged on the support plate;
the upper pressure gauge applies a lower pressure according to an applied pressure set value of the controller;
or the controller collects the lower pressure applied by the upper pressure gauge, and when the lower pressure reaches the set value of the applied pressure, the upper pressure gauge is controlled to stop pressurizing;
the controller takes the lower pressure exerted by the upper pressure gauge as first pressure, the controller takes the pressure of the pressure sensor minus the auxiliary weight as second pressure, the auxiliary weight is the static supporting force of the lower supporting column to the supporting plate and the supporting legs, the controller calculates the pressure difference of the first pressure minus the second pressure, and the controller judges whether the detected part of the toughened glass tableware is easy to self-explode according to the absolute value of the pressure difference.
5. The nondestructive toughened glass tableware self-explosion hidden danger detection device according to claim 4, wherein: the controller is a singlechip, control software is installed in the singlechip, and the control software comprises:
(1) And (3) a setting module: receiving the total test times N, an applied pressure set value and an upper limit of a pressure difference absolute value;
(2) And the acquisition module is used for: receiving signals of a pressure sensor and/or an upper pressure gauge;
(3) The logic control module: the upper pressure gauge is controlled to apply pressure according to an applied pressure set value or collect signals of the upper pressure gauge, the pressure applied by the upper pressure gauge is used as a first pressure, the auxiliary weight is subtracted from the pressure sensor signal in the collecting module to be used as a second pressure after the pressure stabilizing time is up, the pressure difference between the first pressure and the second pressure is calculated, and if the absolute value of the pressure difference is smaller than the upper limit of the absolute value of the pressure difference in the setting module, the measured part is not easy to self-explode; if the absolute value of the pressure difference is larger than or equal to the upper limit of the absolute value of the pressure difference in the setting module, the measured part is easy to self-explode; the auxiliary weight is the static supporting force of the lower supporting column to the supporting plate and the supporting legs;
(4) And an output module: outputting signal lamp or/and sound prompt according to the judging result of the logic control module, wherein the signal for automatically lighting the red lamp or/and the signal for driving the sound equipment are easy to be automatically exploded, and the signal for driving the green lamp to be lighted is not easy to be automatically exploded;
(5) And a display module: for outputting information in the display setting module, and absolute value information of the first pressure, the second pressure, and the pressure difference.
6. The nondestructive toughened glass tableware self-explosion hidden danger detection device according to claim 5, wherein: the control software further includes a storage module: for storing information of the display module.
7. The nondestructive toughened glass tableware self-explosion hidden danger detection device according to claim 5 or 6, wherein: the voltage stabilizing time of the logic control module is 25-35 s.
8. The nondestructive toughened glass tableware self-explosion hidden danger detection device according to claim 5 or 6, wherein: the supporting legs are uniformly distributed along the central circumference of the lower supporting column, and the center distance between two adjacent supporting legs is 3-5 cm.
9. The nondestructive toughened glass tableware self-explosion hidden danger detection device according to claim 8, wherein: the supporting leg comprises a wood block, and an elastic sleeve is wrapped on the wood block.
10. The nondestructive toughened glass tableware self-explosion hidden danger detection device according to claim 9, wherein: the wood block is pine with the Shore hardness of 560-600 HA, and the elastic sleeve is a rubber sleeve.
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