CN115266731B - Method for detecting production qualification of O-shaped sealing ring - Google Patents
Method for detecting production qualification of O-shaped sealing ring Download PDFInfo
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- CN115266731B CN115266731B CN202210889908.7A CN202210889908A CN115266731B CN 115266731 B CN115266731 B CN 115266731B CN 202210889908 A CN202210889908 A CN 202210889908A CN 115266731 B CN115266731 B CN 115266731B
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- 238000007789 sealing Methods 0.000 title claims abstract description 179
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000012797 qualification Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 47
- 238000005259 measurement Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000032683 aging Effects 0.000 claims abstract description 12
- 230000007547 defect Effects 0.000 claims abstract description 7
- 238000011179 visual inspection Methods 0.000 claims abstract description 5
- 230000002950 deficient Effects 0.000 claims description 33
- 238000009864 tensile test Methods 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 12
- -1 cracks Substances 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 4
- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 4
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000007689 inspection Methods 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8803—Visual inspection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
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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
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
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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
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/952—Inspecting the exterior surface of cylindrical bodies or wires
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to the technical field of O-shaped sealing ring production, in particular to a method for detecting the qualification of O-shaped sealing rings, which comprises the following steps: s1, appearance quality detection; s2, detecting mechanical properties; s3, finished product packaging detection. Wherein the appearance quality detection comprises visual inspection, surface defect detection and size detection, and the mechanical property detection comprises hardness test, tensile property test, liquid resistance test and aging test. According to the invention, appearance quality detection can be performed after the O-shaped sealing ring is produced, firstly, the visual inspection is performed by the naked eyes, then the surface defect and the size of the O-shaped sealing ring are detected by a visual measurement system, the error is reduced, and the detection precision is improved; mechanical performance detection is carried out, and hardness, tensile performance, liquid resistance and aging tests are carried out on the O-shaped sealing ring, so that the detection of the O-shaped sealing ring is more comprehensive, and the quality of the detected finished product is higher; and the finished product packaging detection is carried out, so that the delivery qualification rate is improved, and the loss of sellers or buyers is reduced.
Description
Technical Field
The invention relates to the technical field of production of O-shaped sealing rings, in particular to a method for detecting qualified production of O-shaped sealing rings.
Background
Various sealing rings are adopted between interfaces of equipment to effectively seal, and currently, the O-shaped sealing rings are widely used in various mechanical, chemical, metallurgical, pharmaceutical and other equipment to prevent leakage of liquid and gas. The O-shaped sealing ring is generally required to be detected before leaving the factory after being produced and processed, and whether the O-shaped sealing ring is qualified or not is detected, and the O-shaped sealing ring meets the factory standard.
For example, patent publication No. CN109671082a discloses a seal ring detection method, device, apparatus and computer readable storage medium, wherein the seal ring detection method is implemented by receiving a gray image of a seal ring; respectively carrying out edge searching on an inner circle and an outer circle in the gray level image, wherein the inner circumference is smaller than the outer circumference; acquiring the distance between edge points; acquiring an inner circumference pixel value and an outer circumference pixel value according to the distance between the edge points so as to acquire the inner circumference and the outer circumference; and determining the inner diameter and the section diameter of the sealing ring according to the inner circumference and the outer circumference. According to the application, after the gray level image of the sealing ring is received, the edge search is respectively carried out on the inner circle and the outer circle to obtain the distance between edge points, so that the circumference pixel values of the inner circle and the outer circle are respectively obtained, the circumferences of the inner circle and the outer circle are further obtained, the inner diameter and the section diameter of the sealing ring are finally obtained, and the efficiency of measuring the size of the sealing ring is effectively improved.
According to the detection method for the sealing ring, only the gray level image of the sealing ring can be received, so that the inner circumference and the outer circumference of the sealing ring can be obtained, the inner diameter and the section diameter of the sealing ring can be determined, the detection range of the sealing ring is smaller, and other performances of the sealing ring cannot be detected.
Therefore, we propose a method for detecting the qualification of O-shaped sealing rings.
Disclosure of Invention
The invention aims to provide a method for detecting the qualified production of an O-shaped sealing ring, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the method for detecting the qualified production of the O-shaped sealing ring specifically comprises the following steps:
s1, appearance quality detection:
s101, visual inspection:
the staff visually detects whether the surface of the O-shaped sealing ring is smooth and clean, whether the surface of the O-shaped sealing ring has pores, cracks, impurities and bubbles, and if the surface of the O-shaped sealing ring has the pores, cracks, impurities and bubbles, the defective products are manually removed;
s102, surface defect detection:
s1021, building a vision measurement system for the O-shaped sealing ring by adopting an industrial camera, a lens, a computer and an annular LED light source which are suitable for index specifications, and calibrating the vision measurement system;
s1022, collecting image information of the O-shaped sealing ring;
S1023, preprocessing the collected image information of the O-shaped sealing ring into a gray image, comparing the gray image with a standard template image and set related parameters, comparing whether an inconsistent area exceeds a set parameter range, outputting defective product alarm information and a defective product removing control signal if the inconsistent area exceeds the set parameter range, and removing defective products of the O-shaped sealing ring;
S103, size detection:
s1031, respectively carrying out edge searching on the inner circle and the outer circle in the gray level image through the vision measurement system in the step S102 to obtain the distance between edge points;
s1032, acquiring an inner circumference pixel value and an outer circumference pixel value according to the acquired distance between the edge points, thereby acquiring an inner circumference and an outer circumference;
S1033, calculating the inner diameter and the section diameter of the O-shaped sealing ring according to the inner circumference and the outer circumference, comparing the inner diameter and the section diameter with set parameters, comparing whether the calculated data of the inner diameter and the section diameter of the O-shaped sealing ring exceeds the set parameter range, outputting defective product alarming information and defective product removing control signals if the data exceeds the set parameter range, and removing defective products of the O-shaped sealing ring;
S2, mechanical property detection:
S201, hardness test:
s2011, performing a hardness test on the O-shaped sealing ring through a Shore hardness tester, firstly checking whether a pointer of the Shore hardness tester is zeroed, and adjusting the pointer to be zeroed by using a screwdriver if the pointer is not zeroed;
S2012, after zeroing, pressing the needle head on the surface of the O-shaped sealing ring vertically with proper force at a constant speed, and recording the tested numerical value on the dial of the Shore hardness tester when the end face of the needle head of the Shore hardness tester is completely contacted with the surface of the O-shaped sealing ring to be tested;
S2013, measuring different positions of the O-shaped sealing ring, taking an average value of the positions to obtain the Shore hardness of the O-shaped sealing ring, comparing the calculated Shore hardness with preset parameters, and eliminating defective products if the calculated Shore hardness exceeds the range of the preset parameters;
S202, tensile property test:
S2021, performing tensile property test on the O-shaped sealing ring by a tensile testing machine, and performing test parameter setting on the tensile testing machine according to test requirements and the shape and the size of the O-shaped sealing ring;
s2022, selecting a corresponding clamp according to the test requirement and the shape and the size of the O-shaped sealing ring, and installing the O-shaped sealing ring on a tensile testing machine through the clamp;
S2023, enabling the tensile testing machine to enter a testing state by starting a switch of the tensile testing machine, and testing the O-shaped sealing ring;
s2024, after the test is finished, taking down the sample from the clamp, calculating the tensile strength and the stretch-break elongation of the O-shaped sealing ring by using test data, comparing the calculated tensile strength and the calculated stretch-break elongation with preset parameters, and if the calculated tensile strength and the calculated stretch-break elongation exceed the preset parameter range, rejecting defective products;
S203, liquid resistance test:
According to the service condition of the O-shaped sealing ring, selecting corresponding liquid, soaking the O-shaped sealing ring in the liquid for 5-8 hours, taking out the O-shaped sealing ring, naturally drying, and repeating the step S201 and the step S202 to detect the hardness and tensile property requirements of the O-shaped sealing ring;
S204, aging test:
Setting corresponding parameters according to the service condition of the O-shaped sealing ring, placing the O-shaped sealing ring in an aging box, baking for 1-1.5 h, taking out the O-shaped sealing ring, naturally cooling and standing, and repeating the step S201 and the step S202 to detect the hardness and tensile property requirements of the O-shaped sealing ring;
S3, finished product package detection:
after the finished product is packaged, weighing is carried out through weighing equipment, whether the O-shaped sealing ring in one package is in neglected loading or in multiple loading is detected, the weighing result is compared with preset parameters, and if the weighing result exceeds the range of the preset parameters, defective products of the finished product package are removed.
In step 103, the inner circumference is smaller than the outer circumference. The inner diameter of the O-shaped sealing ring is calculated through the inner circumference, and the outer diameter of the O-shaped sealing ring is calculated through the outer circumference.
In the step S201, if the detected thickness of the O-ring is less than 3mm, the O-ring with the same specification and the same batch is required to be overlapped to more than 3mm for detection. If the thickness of the O-shaped sealing ring is smaller than 3mm, measurement is directly carried out, and the measurement accuracy can be influenced, so that the O-shaped sealing ring is required to be overlapped and then detected, and the measurement accuracy is ensured.
In the step S201, the number of measurements is not less than 3. The accuracy of measurement is improved, and the influence of extreme values on the measurement result is reduced.
In the step S203, the temperature of the O-shaped sealing ring is-40-100 ℃ and the pressure is 15-30 MPa. The O-shaped sealing ring is soaked in liquid, so that the liquid erosion condition of the O-shaped sealing ring in the use process is simulated.
In the step S203, the natural drying time of the O-shaped sealing ring is 18-36 h. The O-shaped sealing ring can be naturally recovered after being soaked, and then subsequent inspection is carried out, so that errors are reduced, and accuracy is improved.
In the step S204, the baking temperature of the O-shaped sealing ring is 120-220 ℃. The O-shaped sealing ring is baked in the aging box, and the high temperature condition of the O-shaped sealing ring in the use process is simulated.
In the step S204, the time for naturally cooling and parking the O-shaped sealing ring is 16-144 h. The O-shaped sealing ring can be naturally restored after baking, and then subsequent inspection is carried out, so that errors are reduced, and accuracy is improved.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, the appearance quality detection, the mechanical property detection and the finished product packaging detection can be carried out after the production of the O-shaped sealing ring, so that the delivery qualification rate of the O-shaped sealing ring can be improved;
2. in the appearance quality detection, firstly, defective products with pores, cracks, impurities and bubbles on the surface are removed by naked eyes, and then the surface defects and the sizes of the O-shaped sealing rings are detected by a vision measurement system, so that errors are reduced, and the detection precision is improved;
3. In the mechanical performance detection, firstly, the hardness and tensile performance test is carried out on the O-shaped sealing ring, whether the mechanical strength of the O-shaped sealing ring meets the specification is detected, then the liquid resistance and ageing test is carried out on the O-shaped sealing ring, the use environment of the O-shaped sealing ring is simulated, whether the mechanical endurance of the O-shaped sealing ring meets the specification is detected, the detection of the O-shaped sealing ring is more comprehensive, and the quality of the detected finished product is higher;
4. in the finished product package detection, whether the O-shaped sealing ring in one package is in missing or multiple packages is detected, so that the delivery qualification rate is improved, and the loss of sellers or buyers is reduced.
Drawings
FIG. 1 is a flow chart of a method for detecting the production qualification of an O-shaped sealing ring;
FIG. 2 is a flow chart of the appearance quality detection of the present invention;
FIG. 3 is a flow chart of the mechanical property test of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the present invention provides a technical solution: the method for detecting the qualified production of the O-shaped sealing ring specifically comprises the following steps:
s1, appearance quality detection:
s101, visual inspection:
the staff visually detects whether the surface of the O-shaped sealing ring is smooth and clean, whether the surface of the O-shaped sealing ring has pores, cracks, impurities and bubbles, and if the surface of the O-shaped sealing ring has the pores, cracks, impurities and bubbles, the defective products are manually removed;
s102, surface defect detection:
s1021, building a vision measurement system for the O-shaped sealing ring by adopting an industrial camera, a lens, a computer and an annular LED light source which are suitable for index specifications, and calibrating the vision measurement system;
s1022, collecting image information of the O-shaped sealing ring;
S1023, preprocessing the collected image information of the O-shaped sealing ring into a gray image, comparing the gray image with a standard template image and set related parameters, comparing whether an inconsistent area exceeds a set parameter range, outputting defective product alarm information and a defective product removing control signal if the inconsistent area exceeds the set parameter range, and removing defective products of the O-shaped sealing ring;
S103, size detection:
s1031, respectively carrying out edge searching on the inner circle and the outer circle in the gray level image through the vision measurement system in the step S102 to obtain the distance between edge points;
S1032, acquiring an inner circumference pixel value and an outer circumference pixel value according to the acquired distance between the edge points, wherein the inner circumference is smaller than the outer circumference, so as to acquire the inner circumference and the outer circumference;
S1033, calculating the inner diameter and the section diameter of the O-shaped sealing ring according to the inner circumference and the outer circumference, comparing the inner diameter and the section diameter with set parameters, comparing whether the calculated data of the inner diameter and the section diameter of the O-shaped sealing ring exceeds the set parameter range, outputting defective product alarming information and defective product removing control signals if the data exceeds the set parameter range, and removing defective products of the O-shaped sealing ring;
S2, mechanical property detection:
S201, hardness test:
s2011, performing a hardness test on the O-shaped sealing ring through a Shore hardness tester, firstly checking whether a pointer of the Shore hardness tester is zeroed, and adjusting the pointer to be zeroed by using a screwdriver if the pointer is not zeroed;
S2012, after zeroing, pressing the needle head on the surface of the O-shaped sealing ring vertically with proper force at a constant speed, and recording the tested numerical value on the dial of the Shore hardness tester when the end face of the needle head is completely contacted with the surface of the O-shaped sealing ring to be tested, if the thickness of the O-shaped sealing ring to be tested is smaller than 3mm, the O-shaped sealing ring with the same specification and the same batch is required to be overlapped to be more than 3mm for detection, and if the thickness of the O-shaped sealing ring is smaller than 3mm, the measurement accuracy is directly affected, so that the O-shaped sealing ring is required to be overlapped for detection, and the measurement accuracy is ensured;
s2013, measuring different positions of the O-shaped sealing ring for at least 3 times, taking an average value of the measured times to obtain the Shore hardness of the O-shaped sealing ring, improving the measurement precision, reducing the influence of an extreme value on a measurement result, comparing the calculated Shore hardness with a preset parameter, and eliminating defective products if the calculated Shore hardness exceeds the range of the preset parameter;
S202, tensile property test:
S2021, performing tensile property test on the O-shaped sealing ring by a tensile testing machine, and performing test parameter setting on the tensile testing machine according to test requirements and the shape and the size of the O-shaped sealing ring;
s2022, selecting a corresponding clamp according to the test requirement and the shape and the size of the O-shaped sealing ring, and installing the O-shaped sealing ring on a tensile testing machine through the clamp;
S2023, enabling the tensile testing machine to enter a testing state by starting a switch of the tensile testing machine, and testing the O-shaped sealing ring;
s2024, after the test is finished, taking down the sample from the clamp, calculating the tensile strength and the stretch-break elongation of the O-shaped sealing ring by using test data, comparing the calculated tensile strength and the calculated stretch-break elongation with preset parameters, and if the calculated tensile strength and the calculated stretch-break elongation exceed the preset parameter range, rejecting defective products;
S203, liquid resistance test:
According to the service condition of the O-shaped sealing ring, corresponding liquid is selected, the O-shaped sealing ring is placed in the liquid to be soaked for 5-8 hours, the temperature during soaking is-40-100 ℃, the pressure is 15-30 MPa, the O-shaped sealing ring is soaked in the liquid, the liquid erosion condition of the O-shaped sealing ring in the use process is simulated, then the O-shaped sealing ring is taken out to be naturally dried, the natural drying time of the O-shaped sealing ring is 18-36 hours, the O-shaped sealing ring can be naturally recovered after soaking, then the subsequent inspection is carried out, the error is reduced, the precision is improved, the step S201 and the step S202 are repeated, and the hardness and tensile property requirements of the O-shaped sealing ring are detected;
S204, aging test:
According to the service condition of the O-shaped sealing ring, setting corresponding parameters, placing the O-shaped sealing ring in an aging box, baking for 1-1.5 h, wherein the baking temperature is 120-220 ℃, baking the O-shaped sealing ring in the aging box, simulating the high temperature condition of the O-shaped sealing ring in the use process, taking out the O-shaped sealing ring, naturally cooling and parking the O-shaped sealing ring, and naturally cooling and parking the O-shaped sealing ring for 16-144 h, so that the O-shaped sealing ring can be naturally recovered after baking, then carrying out subsequent inspection, reducing errors, improving precision, repeating the step S201 and the step S202, and detecting the hardness and tensile property requirements of the O-shaped sealing ring;
S3, finished product package detection:
When the finished product is packaged, a specified number of O-shaped sealing rings are packaged in a packaging container, so that after the finished product is packaged, weighing is performed through weighing equipment, whether the O-shaped sealing rings in one package are in missing or multiple packages is detected, the weighing result is compared with preset parameters, if the weighing result exceeds the preset parameter range, defective products in the finished product package are removed, and subsequently defective product packages can be removed for repacking.
In summary, compared with the prior art: the invention can detect the appearance quality, the mechanical property and the finished product package of the O-shaped sealing ring; in the appearance quality detection, firstly, defective products with pores, cracks, impurities and bubbles on the surface are removed by naked eyes, and then the surface defects and the sizes of the O-shaped sealing rings are detected by a vision measurement system, so that errors are reduced, and the detection precision is improved; in the mechanical performance detection, firstly, hardness and tensile performance tests are carried out on the O-shaped sealing ring, whether the mechanical strength of the O-shaped sealing ring meets the specification or not is detected, then, liquid resistance and ageing tests are carried out on the O-shaped sealing ring, the use environment of the O-shaped sealing ring is simulated, whether the mechanical endurance of the O-shaped sealing ring meets the specification or not is detected, so that the detection of the O-shaped sealing ring is more comprehensive, and the quality of a detected finished product is higher; in finished product package detection, whether the O-shaped sealing ring in one package is in missing or multiple packages is detected, so that the delivery qualification rate is improved, and the loss of sellers or buyers is reduced.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for detecting the qualified production of the O-shaped sealing ring is characterized by comprising the following steps of:
s1, appearance quality detection:
s101, visual inspection:
the staff visually detects whether the surface of the O-shaped sealing ring is smooth and clean, whether the surface of the O-shaped sealing ring has pores, cracks, impurities and bubbles, and if the surface of the O-shaped sealing ring has the pores, cracks, impurities and bubbles, the defective products are manually removed;
s102, surface defect detection:
s1021, building a vision measurement system for the O-shaped sealing ring by adopting an industrial camera, a lens, a computer and an annular LED light source which are suitable for index specifications, and calibrating the vision measurement system;
s1022, collecting image information of the O-shaped sealing ring;
S1023, preprocessing the collected image information of the O-shaped sealing ring into a gray image, comparing the gray image with a standard template image and set related parameters, comparing whether an inconsistent area exceeds a set parameter range, outputting defective product alarm information and a defective product removing control signal if the inconsistent area exceeds the set parameter range, and removing defective products of the O-shaped sealing ring;
S103, size detection:
s1031, respectively carrying out edge searching on the inner circle and the outer circle in the gray level image through the vision measurement system in the step S102 to obtain the distance between edge points;
s1032, acquiring an inner circumference pixel value and an outer circumference pixel value according to the acquired distance between the edge points, thereby acquiring an inner circumference and an outer circumference;
S1033, calculating the inner diameter and the section diameter of the O-shaped sealing ring according to the inner circumference and the outer circumference, comparing the inner diameter and the section diameter with set parameters, comparing whether the calculated data of the inner diameter and the section diameter of the O-shaped sealing ring exceeds the set parameter range, outputting defective product alarming information and defective product removing control signals if the data exceeds the set parameter range, and removing defective products of the O-shaped sealing ring;
S2, mechanical property detection:
S201, hardness test:
s2011, performing a hardness test on the O-shaped sealing ring through a Shore hardness tester, firstly checking whether a pointer of the Shore hardness tester is zeroed, and adjusting the pointer to be zeroed by using a screwdriver if the pointer is not zeroed;
S2012, after zeroing, pressing the needle head on the surface of the O-shaped sealing ring vertically with proper force at a constant speed, and recording the tested numerical value on the dial of the Shore hardness tester when the end face of the needle head of the Shore hardness tester is completely contacted with the surface of the O-shaped sealing ring to be tested;
S2013, measuring different positions of the O-shaped sealing ring, taking an average value of the positions to obtain the Shore hardness of the O-shaped sealing ring, comparing the calculated Shore hardness with preset parameters, and eliminating defective products if the calculated Shore hardness exceeds the range of the preset parameters;
S202, tensile property test:
S2021, performing tensile property test on the O-shaped sealing ring by a tensile testing machine, and performing test parameter setting on the tensile testing machine according to test requirements and the shape and the size of the O-shaped sealing ring;
s2022, selecting a corresponding clamp according to the test requirement and the shape and the size of the O-shaped sealing ring, and installing the O-shaped sealing ring on a tensile testing machine through the clamp;
S2023, enabling the tensile testing machine to enter a testing state by starting a switch of the tensile testing machine, and testing the O-shaped sealing ring;
s2024, after the test is finished, taking down the sample from the clamp, calculating the tensile strength and the stretch-break elongation of the O-shaped sealing ring by using test data, comparing the calculated tensile strength and the calculated stretch-break elongation with preset parameters, and if the calculated tensile strength and the calculated stretch-break elongation exceed the preset parameter range, rejecting defective products;
S203, liquid resistance test:
According to the service condition of the O-shaped sealing ring, selecting corresponding liquid, soaking the O-shaped sealing ring in the liquid for 5-8 hours, taking out the O-shaped sealing ring, naturally drying, and repeating the step S201 and the step S202 to detect the hardness and tensile property requirements of the O-shaped sealing ring;
S204, aging test:
Setting corresponding parameters according to the service condition of the O-shaped sealing ring, placing the O-shaped sealing ring in an aging box, baking for 1-1.5 h, taking out the O-shaped sealing ring, naturally cooling and standing, and repeating the step S201 and the step S202 to detect the hardness and tensile property requirements of the O-shaped sealing ring;
S3, finished product package detection:
after the finished product is packaged, weighing is carried out through weighing equipment, whether the O-shaped sealing ring in one package is in neglected loading or in multiple loading is detected, the weighing result is compared with preset parameters, and if the weighing result exceeds the range of the preset parameters, defective products of the finished product package are removed.
2. The method for detecting the production qualification of the O-shaped sealing ring according to claim 1, which is characterized in that: in step 103, the inner circumference is smaller than the outer circumference.
3. The method for detecting the production qualification of the O-shaped sealing ring according to claim 1, which is characterized in that: in the step S201, if the detected thickness of the O-ring is less than 3mm, the O-ring with the same specification and the same batch is required to be overlapped to more than 3mm for detection.
4. The method for detecting the production qualification of the O-shaped sealing ring according to claim 1, which is characterized in that: in the step S201, the number of measurements is not less than 3.
5. The method for detecting the production qualification of the O-shaped sealing ring according to claim 1, which is characterized in that: in the step S203, the temperature of the O-shaped sealing ring is-40-100 ℃ and the pressure is 15-30 MPa.
6. The method for detecting the production qualification of the O-shaped sealing ring according to claim 1, which is characterized in that: in the step S203, the natural drying time of the O-shaped sealing ring is 18-36 h.
7. The method for detecting the production qualification of the O-shaped sealing ring according to claim 1, which is characterized in that: in the step S204, the baking temperature of the O-shaped sealing ring is 120-220 ℃.
8. The method for detecting the production qualification of the O-shaped sealing ring according to claim 1, which is characterized in that: in the step S204, the time for naturally cooling and parking the O-shaped sealing ring is 16-144 h.
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