CN115266731A - Method for detecting qualified production of O-shaped sealing ring - Google Patents
Method for detecting qualified production of O-shaped sealing ring Download PDFInfo
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- CN115266731A CN115266731A CN202210889908.7A CN202210889908A CN115266731A CN 115266731 A CN115266731 A CN 115266731A CN 202210889908 A CN202210889908 A CN 202210889908A CN 115266731 A CN115266731 A CN 115266731A
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- 238000007789 sealing Methods 0.000 title claims abstract description 178
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000032683 aging Effects 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 238000004806 packaging method and process Methods 0.000 claims abstract description 8
- 230000007547 defect Effects 0.000 claims abstract description 7
- 238000012797 qualification Methods 0.000 claims abstract description 7
- 238000011179 visual inspection Methods 0.000 claims abstract description 7
- 238000009864 tensile test Methods 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 12
- 230000002950 deficient Effects 0.000 claims description 8
- 239000012535 impurity Substances 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- -1 cracks Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007781 pre-processing Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 description 5
- 230000003628 erosive effect Effects 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
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing 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
- 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
- G01N21/95—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
Abstract
The invention relates to the technical field of O-shaped sealing ring production, in particular to a method for detecting qualified O-shaped sealing ring production, which specifically comprises the following steps: s1, detecting appearance quality; s2, detecting mechanical properties; and S3, packaging and detecting finished products. The appearance quality detection comprises visual inspection, surface defect detection and size detection, and the mechanical property detection comprises a hardness test, a tensile property test, a liquid resistance test and an aging test. The appearance quality detection can be performed after the O-shaped sealing ring is produced, firstly, the visual inspection is performed through the naked eyes, and then, the surface defects and the sizes of the O-shaped sealing ring are detected through a visual measurement system, so that the error is reduced, and the detection precision is improved; the mechanical property detection is carried out, and the O-shaped sealing ring is subjected to hardness, tensile property, liquid resistance and aging test, so that the O-shaped sealing ring is detected more comprehensively, and the detected finished product has higher quality; and finished product packaging detection is carried out, 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 data O-shaped sealing rings, in particular to a method for detecting qualified production of an O-shaped sealing ring.
Background
Various sealing rings are adopted for effective sealing between interfaces of equipment, and at present, O-shaped sealing rings are widely applied to various mechanical, chemical, metallurgical, pharmaceutical and other equipment in order to prevent liquid and gas from leaking. After production and processing, the O-shaped sealing ring generally needs to be detected before leaving a factory, and whether the O-shaped sealing ring is qualified or not is detected, so that the O-shaped sealing ring meets the factory standard.
For example, patent publication No. CN109671082a discloses a method, an apparatus, a device and a computer readable storage medium for detecting a sealing ring, wherein the method for detecting a sealing ring receives a gray image of the sealing ring; respectively searching the edges of the inner circle and the outer circle in the gray level image, wherein the length of the inner circle is less than that of the outer circle; obtaining the distance between the 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 obtain 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. This application carries out the border to interior circle and excircle respectively and seeks after receiving sealing washer grey level image, obtains the distance between the border point to obtain the girth pixel value of interior circle and excircle respectively, further obtain the girth of interior circle and excircle, finally obtain the internal diameter and the cross-section diameter of sealing washer, effectively promote the efficiency of measuring the sealing washer size.
According to the sealing ring detection method, the inner circumference and the outer circumference of the sealing ring can be obtained only by receiving the gray level image of the sealing ring, so that the inner diameter and the section diameter of the sealing ring are determined, the detection range of the sealing ring is small, and other performances of the sealing ring cannot be detected.
Therefore, a method for detecting qualified production of the O-shaped sealing ring is provided.
Disclosure of Invention
The invention aims to provide a method for detecting qualified production of an O-shaped sealing ring, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for detecting qualified production of an O-shaped sealing ring specifically comprises the following steps:
s1, appearance quality detection:
s101, visual inspection:
a worker visually inspects whether the surface of the O-shaped sealing ring is smooth and clean, whether pores, cracks, impurities and bubbles exist on the surface of the O-shaped sealing ring, and if the pores, the cracks, the impurities and the bubbles exist on the surface of the O-shaped sealing ring, defective products are manually removed;
s102, surface defect detection:
s1021, building a vision measuring system aiming at 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 measuring system;
s1022, collecting image information of the O-shaped sealing ring;
s1023, preprocessing the acquired 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, and comparing to find whether the inconsistent area exceeds the set parameter range, if so, outputting inferior-quality alarm information and a reject control signal to reject inferior-quality O-shaped sealing ring;
s103, size detection:
s1031, respectively searching edges of the inner circle and the outer circle in the gray scale image through the vision measuring system in the step S102, and obtaining 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 exceed the set parameter range, if the data of the inner diameter and the section diameter exceed the set parameter range, outputting inferior-quality alarm information and a reject control signal, and rejecting inferior-quality O-shaped sealing rings;
s2, detecting mechanical properties:
s201, hardness test:
s2011, performing a hardness test on the O-shaped sealing ring through a Shore durometer, firstly checking whether a pointer of the Shore durometer is zero, and if not, adjusting to zero by using a screwdriver;
s2012, after zero setting, vertically pressing the needle head on the surface of the O-shaped sealing ring at a constant speed by using proper force, and recording a numerical value tested on a dial plate of a hardness tester when the end surface 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 again, taking an average value of the measured positions to obtain the Shore hardness of the O-shaped sealing ring, comparing the calculated Shore hardness with preset parameters, and if the calculated Shore hardness exceeds the preset parameter range, rejecting inferior-quality products;
s202, tensile property test:
s2021, performing a tensile property test on the O-shaped sealing ring through a tensile testing machine, and setting test parameters of 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, starting a switch of the tensile testing machine to enable the tensile testing machine to enter a testing state, and testing the O-shaped sealing ring;
s2024, after the test is finished, taking down the test sample from the clamp, calculating the tensile strength and the elongation at break of the O-shaped sealing ring by using test data, comparing the calculated tensile strength and the elongation at break with preset parameters, and if the calculated tensile strength and the elongation at break exceed the preset parameter range, rejecting inferior products;
s203, liquid resistance test:
selecting corresponding liquid according to the use condition of the O-shaped sealing ring, soaking the O-shaped sealing ring in the liquid for 5-8 hours, taking out the O-shaped sealing ring for natural drying, repeating the step S201 and the step S202, and detecting the hardness and tensile property requirements of the O-shaped sealing ring;
s204, aging test:
setting corresponding parameters according to the use condition of the O-shaped sealing ring, placing the O-shaped sealing ring in an aging oven for baking for 1-1.5 h, taking out the O-shaped sealing ring for natural cooling and placing, 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 packaging detection:
and after the finished product is packaged, weighing by using a weighing device, detecting whether the O-shaped sealing ring in one package is neglected or is in multiple packages, comparing the weighing result with a preset parameter, and if the weighing result exceeds the preset parameter range, rejecting the defective packaged finished product.
In step 103, the inner circumference is smaller than the outer circumference. The inner diameter of the O-shaped sealing ring is calculated according to the length of the inner circumference, and the outer diameter of the O-shaped sealing ring is calculated according to the length of the outer circumference.
In step S201, if the thickness of the detected O-ring is less than 3mm, the O-rings in the same batch and the same specification need to be stacked to more than 3mm for detection. If O type sealing washer thickness is less than 3mm, directly measure, can influence measurement accuracy, consequently need overlap O type sealing washer, detect again to guarantee measurement accuracy.
In step S201, the number of measurements is not less than 3. The measurement precision is improved, and the influence of extreme values on the measurement result is reduced.
In step S203, the temperature of the O-shaped sealing ring during soaking is-40 to 100 ℃, and the pressure is 15 to 30MPa. The O-shaped sealing ring is soaked in liquid, and the liquid erosion condition which can be met by the O-shaped sealing ring in the using process is simulated.
In the step S203, the natural drying time of the O-ring is 18 to 36 hours. The O-shaped sealing ring can be naturally recovered after being soaked, and then subsequent inspection is carried out, so that the error is reduced, and the precision 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 which can be met by the O-shaped sealing ring in the use process is simulated.
In the step S204, the natural cooling and stopping time of the O-shaped sealing ring is 16-144 h. The O-shaped sealing ring can be naturally recovered after being baked, and then subsequent inspection is carried out, so that the error is reduced, and the precision is improved.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can carry out appearance quality detection, mechanical property detection and finished product packaging detection after the O-shaped sealing ring is produced, and can improve the ex-factory qualification rate of the O-shaped sealing ring;
2. in appearance quality detection, firstly, inferior-quality products with pores, cracks, impurities and bubbles on the surface are removed through visual inspection by human eyes, and then the surface defects and the sizes of the O-shaped sealing ring are detected through a visual measurement system, so that errors are reduced, and the detection precision is improved;
3. in the mechanical performance detection, firstly, the O-shaped sealing ring is subjected to hardness and tensile performance tests to detect whether the mechanical strength of the O-shaped sealing ring meets the specification or not, then the O-shaped sealing ring is subjected to liquid resistance and aging resistance tests to simulate the use environment of the O-shaped sealing ring and detect whether the mechanical endurance of the O-shaped sealing ring meets the specification or not, so that the O-shaped sealing ring is detected more comprehensively, and the quality of a detected finished product is higher;
4. in the finished product package detection, whether the O-shaped sealing ring in one package is neglected or is in multiple packages is detected, the delivery qualification rate is improved, and the loss of sellers or buyers is reduced.
Drawings
FIG. 1 is a flow chart of a qualified detection method for O-shaped sealing ring production according to the present invention;
FIG. 2 is a flow chart of the appearance quality inspection of the present invention;
FIG. 3 is a flow chart of mechanical property detection according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a method for detecting qualified production of an O-shaped sealing ring specifically comprises the following steps:
s1, appearance quality detection:
s101, visual inspection:
a worker visually inspects whether the surface of the O-shaped sealing ring is smooth and clean, whether pores, cracks, impurities and bubbles exist on the surface of the O-shaped sealing ring, and if the pores, the cracks, the impurities and the bubbles exist on the surface of the O-shaped sealing ring, defective products are manually removed;
s102, surface defect detection:
s1021, building a vision measuring system aiming at 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 measuring system;
s1022, collecting image information of the O-shaped sealing ring;
s1023, preprocessing the acquired 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, and comparing to find whether the inconsistent area exceeds the set parameter range, if so, outputting inferior-quality alarm information and a reject control signal to reject inferior-quality O-shaped sealing ring;
s103, size detection:
s1031, respectively searching edges of the inner circle and the outer circle in the gray-scale image through the vision measuring system in the step S102, and obtaining 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 exceed the set parameter range, if the data of the inner diameter and the section diameter exceed the set parameter range, outputting inferior-quality alarm information and a reject control signal, and rejecting inferior-quality O-shaped sealing rings;
s2, detecting mechanical properties:
s201, hardness test:
s2011, performing a hardness test on the O-shaped sealing ring through a Shore durometer, firstly checking whether a pointer of the Shore durometer is zero, and if not, adjusting to zero by using a screwdriver;
s2012, after zeroing, vertically pressing the needle head on the surface of the O-shaped sealing ring at a constant speed by using a proper force, and when the end face of the needle head of the Shore durometer completely contacts the surface of the O-shaped sealing ring to be detected, recording a numerical value tested on a dial plate of the durometer at the moment, if the thickness of the detected O-shaped sealing ring is less than 3mm, overlapping the O-shaped sealing rings of the same specification and the same batch to be more than 3mm and then detecting, and if the thickness of the O-shaped sealing ring is less than 3mm, directly measuring, so that the measuring precision is influenced, so that the O-shaped sealing rings are overlapped and then detected, and the measuring precision is ensured;
s2013, measuring different positions of the O-shaped sealing ring again, taking the average value of the measured times which are not less than 3 times, namely the Shore hardness of the O-shaped sealing ring, improving the measurement precision, reducing the influence of extreme values on the measurement result, comparing the calculated Shore hardness with preset parameters, and if the Shore hardness is beyond the preset parameter range, rejecting inferior-quality products;
s202, tensile property test:
s2021, performing a tensile property test on the O-shaped sealing ring through a tensile testing machine, and setting testing parameters of the tensile testing machine according to testing 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, starting a switch of the tensile testing machine to enable the tensile testing machine to enter a testing state, and testing the O-shaped sealing ring;
s2024, after the test is finished, taking down the test sample from the clamp, calculating the tensile strength and the elongation at break of the O-shaped sealing ring by using test data, comparing the calculated tensile strength and the elongation at break with preset parameters, and if the calculated tensile strength and the elongation at break exceed the preset parameter range, rejecting inferior-quality products;
s203, liquid resistance test:
selecting corresponding liquid according to the use condition of the O-shaped sealing ring, soaking the O-shaped sealing ring in the liquid for 5-8 hours at the temperature of-40-100 ℃ and the pressure of 15-30MPa, and soaking the O-shaped sealing ring in the liquid to simulate the liquid erosion condition which can be met by the O-shaped sealing ring in the use process, then taking out the O-shaped sealing ring for natural drying, wherein the natural drying time of the O-shaped sealing ring is 18-36 hours, so that the O-shaped sealing ring can be naturally recovered after being soaked, then carrying out subsequent inspection, reducing errors, improving the precision, repeating the step S201 and the step S202, and detecting the hardness and tensile property requirements of the O-shaped sealing ring;
s204, aging test:
setting corresponding parameters according to the use condition of the O-shaped sealing ring, placing the O-shaped sealing ring in an aging oven, baking for 1-1.5 hours at the temperature of 120-220 ℃, baking the O-shaped sealing ring in the aging oven, simulating the high-temperature condition which the O-shaped sealing ring can encounter in the use process, taking out the O-shaped sealing ring, naturally cooling and parking for 16-144 hours, so that the O-shaped sealing ring can be naturally recovered after baking, then carrying out subsequent inspection, reducing errors, improving the 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 packaging detection:
generally, when a 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 carried out through a weighing device, whether the O-shaped sealing rings in one packaging are neglected to be packaged or are packaged more than needed is detected, the weighing result is compared with preset parameters, if the weighing result exceeds the preset parameter range, defective packaged products of the finished product are removed, and the defective packaged products can be removed and packaged again.
To sum up, 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 through visual inspection by human eyes, and then, the surface defects and the sizes of the O-shaped sealing ring are detected through a visual measurement system, so that the error is reduced, and the detection precision is improved; in the mechanical property detection, firstly, the O-shaped sealing ring is subjected to hardness and tensile property tests to detect whether the mechanical strength of the O-shaped sealing ring meets the specification or not, then the O-shaped sealing ring is subjected to liquid resistance and aging tests to simulate the use environment of the O-shaped sealing ring and detect whether the mechanical endurance of the O-shaped sealing ring meets the specification or not, so that the O-shaped sealing ring is detected more comprehensively, and the detected finished product has higher quality; in the finished product package detection, whether the O-shaped sealing ring in one package is neglected to be packaged or is packaged more is detected, the delivery qualification rate is improved, and the loss of a seller or a buyer is reduced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments 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 qualified production of the O-shaped sealing ring is characterized by comprising the following steps:
s1, appearance quality detection:
s101, visual inspection:
a worker visually inspects whether the surface of the O-shaped sealing ring is smooth and clean, whether pores, cracks, impurities and bubbles exist on the surface of the O-shaped sealing ring, and if the pores, the cracks, the impurities and the bubbles exist on the surface of the O-shaped sealing ring, defective products are manually removed;
s102, surface defect detection:
s1021, building a vision measuring system aiming at 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 measuring system;
s1022, collecting image information of the O-shaped sealing ring;
s1023, preprocessing the acquired 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, and comparing to find whether the inconsistent area exceeds the set parameter range, if so, outputting inferior-quality alarm information and a reject control signal to reject inferior-quality O-shaped sealing ring;
s103, size detection:
s1031, respectively searching edges of the inner circle and the outer circle in the gray-scale image through the vision measuring system in the step S102, and obtaining 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 exceed the set parameter range, if the data of the inner diameter and the section diameter exceed the set parameter range, outputting inferior-quality alarm information and a reject control signal, and rejecting inferior-quality O-shaped sealing rings;
s2, detecting mechanical properties:
s201, hardness test:
s2011, performing a hardness test on the O-shaped sealing ring through a Shore durometer, firstly checking whether a pointer of the Shore durometer is zero, and if not, adjusting to zero by using a screwdriver;
s2012, after zero setting, vertically pressing the needle head on the surface of the O-shaped sealing ring at a constant speed by using proper force, and recording a numerical value tested on a dial plate of a hardness tester when the end surface 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 again, taking an average value of the measured positions to obtain the Shore hardness of the O-shaped sealing ring, comparing the calculated Shore hardness with preset parameters, and if the calculated Shore hardness exceeds the preset parameter range, rejecting inferior-quality products;
s202, tensile property test:
s2021, performing a tensile property test on the O-shaped sealing ring through a tensile testing machine, and setting testing parameters of the tensile testing machine according to testing 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 mounting the O-shaped sealing ring on a tensile testing machine through the clamp;
s2023, starting a switch of the tensile testing machine to enable the tensile testing machine to enter a testing state, and testing the O-shaped sealing ring;
s2024, after the test is finished, taking down the test sample from the clamp, calculating the tensile strength and the elongation at break of the O-shaped sealing ring by using test data, comparing the calculated tensile strength and the elongation at break with preset parameters, and if the calculated tensile strength and the elongation at break exceed the preset parameter range, rejecting inferior-quality products;
s203, liquid resistance test:
selecting corresponding liquid according to the use condition of the O-shaped sealing ring, soaking the O-shaped sealing ring in the liquid for 5-8 hours, taking out the O-shaped sealing ring for natural drying, repeating the step S201 and the step S202, and detecting the hardness and tensile property requirements of the O-shaped sealing ring;
s204, aging test:
setting corresponding parameters according to the use condition of the O-shaped sealing ring, placing the O-shaped sealing ring in an aging oven for baking for 1-1.5 h, taking out the O-shaped sealing ring for natural cooling and placing, 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 packaging detection:
weighing by a weighing device after the finished product is packaged, detecting whether the O-shaped sealing ring in one package is neglected or is in multiple packages, comparing the weighing result with a preset parameter, and if the weighing result exceeds the preset parameter range, rejecting the defective product of the finished product package.
2. The method for detecting the production qualification of the O-shaped sealing ring according to claim 1, characterized by comprising the following steps: in step 103, the inner circumference is smaller than the outer circumference.
3. The method for detecting qualified production of the O-shaped sealing ring according to claim 1, wherein the method comprises the following steps: in step S201, if the thickness of the detected O-ring is less than 3mm, the O-rings in the same batch and the same specification are stacked to be more than 3mm, and then the detection is performed.
4. The method for detecting qualified production of the O-shaped sealing ring according to claim 1, wherein the method comprises the following steps: in 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, characterized by comprising the following steps: in step S203, the temperature of the O-shaped sealing ring during soaking is-40 to 100 ℃, and the pressure is 15 to 30MPa.
6. The method for detecting qualified production of the O-shaped sealing ring according to claim 1, wherein the method comprises the following steps: in the step S203, the natural drying time of the O-ring is 18 to 36 hours.
7. The method for detecting qualified production of the O-shaped sealing ring according to claim 1, wherein the method comprises the following steps: 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, characterized by comprising the following steps: in the step S204, the time for the O-ring to be naturally cooled and parked is 16 to 144 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210889908.7A CN115266731B (en) | 2022-07-26 | Method for detecting production qualification of O-shaped sealing ring |
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| CN202210889908.7A CN115266731B (en) | 2022-07-26 | Method for detecting production qualification of O-shaped sealing ring |
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| CN117091830A (en) * | 2023-10-18 | 2023-11-21 | 武汉捷沃汽车零部件有限公司 | Batch detection method and detection system for quality of rubber sealing rings |
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| CN117091830A (en) * | 2023-10-18 | 2023-11-21 | 武汉捷沃汽车零部件有限公司 | Batch detection method and detection system for quality of rubber sealing rings |
| CN117091830B (en) * | 2023-10-18 | 2024-01-30 | 武汉捷沃汽车零部件有限公司 | Batch detection method and detection system for quality of rubber sealing rings |
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