CN115265989A - Method for detecting shock resistance of anti-falling swing block - Google Patents
Method for detecting shock resistance of anti-falling swing block Download PDFInfo
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- CN115265989A CN115265989A CN202210523079.0A CN202210523079A CN115265989A CN 115265989 A CN115265989 A CN 115265989A CN 202210523079 A CN202210523079 A CN 202210523079A CN 115265989 A CN115265989 A CN 115265989A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000035939 shock Effects 0.000 title claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 238000002474 experimental method Methods 0.000 claims abstract description 11
- 238000005381 potential energy Methods 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 claims description 10
- 238000009863 impact test Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009435 building construction Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000009194 climbing Effects 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
- G01B5/245—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes for testing perpendicularity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/28—Measuring arrangements characterised by the use of mechanical techniques for measuring roughness or irregularity of surfaces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- 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
- G01N3/06—Special adaptations of indicating or recording means
-
- 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
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/062—Special adaptations of indicating or recording means with mechanical indicating or recording means
-
- 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a method for detecting the shock resistance of an anti-falling swing block, which comprises the following steps: s1, calculating an effective test height according to potential energy equivalence; s2, measuring flatness and verticality initial flaw detection; s3, carrying out an impact experiment; s4, measuring the flatness and the verticality of the tested component and performing flaw detection; s5, comparing the measured data and the flaw detection data before and after the experiment to obtain the plastic deformation of the component and the internal cracks caused by impact; and S6, judging whether the component quality is qualified or not. The detection method can solve the problem that the existing method for detecting the shock resistance of the anti-falling swing block of the climbing frame is lacked, so that the mechanical property of the anti-falling swing block is comprehensively judged according to the bearing surface flatness, the perpendicularity of the bearing surface and the rear side surface and flaw detection items obtained by tests, a good experimental effect is achieved, and the purpose of ensuring the quality of the anti-falling swing block in use is achieved.
Description
Technical Field
The invention relates to the technical field of anti-falling detection of a climbing frame, in particular to a method for detecting the shock resistance of an anti-falling swinging block.
Background
At present, the detection of the anti-falling aspect of the climbing frame in the industry is generally to detect the integral anti-falling performance of the climbing frame, the detection of small parts is not perfect, particularly, the detection of the anti-falling swinging block only has the detection of materials and surface treatment, no specific detection method exists for the detection of the impact resistance and the bearing capacity of the anti-falling swinging block, and the quality cannot be ensured when the anti-falling swinging block is used.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a method for detecting the shock resistance of an anti-falling swing block, which can overcome the defects in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
a method for detecting the shock resistance of an anti-falling swing block comprises the following steps:
s1, calculating an effective test height according to potential energy equivalence: according to
Calculating to obtain effective test height
Wherein, in the step (A),
represents the total weight of the dead load and the live load in the range of the machine position,
the triggering distance of the anti-falling swing block is shown,
showing the weight of the test impact block,
represents the effective test height;
s2, measuring flatness and verticality initial flaw detection: measuring the initial flatness and the verticality of the anti-falling swing block, measuring the flatness of the bearing surface of the swing block to be detected and the verticality of the bearing surface and the rear side surface by using a feeler gauge and an angle gauge, detecting internal defects or cracks of a component by using an ultrasonic flaw detector, and recording original measurement data and flaw detection results;
s3, carrying out an impact experiment: according to the effective test height obtained by the calculation of the S1, a simple anti-falling swinging block impact resistance test device is used for carrying out an impact test, and after the test is finished, the anti-falling swinging block is detached;
s4, measuring the flatness, the verticality and the flaw detection of the component after the experiment: measuring test data, measuring the flatness of the bearing surface of the anti-falling swing block and the perpendicularity of the bearing surface and the rear side surface again, checking whether cracks exist in the component by using an ultrasonic flaw detector, and recording the data; if the detection sample is broken, the measurement is not carried out;
s5, comparing the measured data before and after the experiment with the flaw detection data to obtain the plastic deformation of the component and the internal cracks caused by impact: determining the deformation and the newly added cracks inside, comparing the measured data before and after the test to obtain the plastic deformation and the verticality variation of the bearing section, and comparing the flaw detection results of the sample before and after the test to obtain the internal defects or cracks caused by impact;
s6, judging whether the component quality is qualified: the conclusion judges that the bearing component has no obvious defects of plastic deformation, cracks and the like according to the requirements of 'inspection standards of lifting equipment for building construction'; when the plastic deformation value of the bearing section exceeds 3mm, the plastic deformation occurs obviously, so that excessive extrusion between the guide rail and the outer guide wheel can be caused, and the cross rod and the bearing surface are in lap joint and offset to form potential safety hazards; the quality grade of the anti-falling swinging block is judged according to relevant regulations of steel casting ultrasonic detection part 1, and the quality is unqualified when cracks are detected in the component or on the outer side.
Further, effective test height in S1
And controlling the thickness to be within 6 m.
The invention has the beneficial effects that: the method for detecting the impact resistance of the anti-falling swing block can solve the problem that a method for detecting the impact resistance of the anti-falling swing block of the climbing frame is lacked at present, so that the mechanical property of the anti-falling swing block is comprehensively judged according to the bearing surface flatness, the perpendicularity of the bearing surface and the rear side surface and flaw detection items obtained by tests, a good test effect is achieved, and the purpose of ensuring the quality of the anti-falling swing block in use is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for detecting the impact resistance of an anti-falling swing block according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a simple anti-falling swing block impact resistance experiment device of the anti-falling swing block impact resistance detection method according to the embodiment of the invention;
FIG. 3 is a schematic diagram showing the comparison between the front and the back of the anti-falling swing block test according to the method for detecting the anti-falling swing block impact resistance of the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in FIGS. 1-3, the method for detecting the shock resistance of the anti-falling swing block comprises the following steps:
s1, determining climbing frame system data, and determining the anti-falling triggering distance of the climbing frame according to a climbing frame design system of the anti-falling swinging block to be detected
The support body dead weight load (dead load) of the machine position within range, confirm construction load (live load) according to relevant standard requirement, obtain: test load
= (dead load x fractional coefficient + live load x fractional coefficient) × impact coefficient; determining the balance weight and the effective test height of the impact block, controlling the effective test height within 6m for safe test and convenient operation, and selecting reasonable balance weight of the impact block
According to
Obtaining accurate effective test height
（
）；
S2, measuring initial flatness and verticality, before testing, measuring the flatness of a bearing section (a contact section of a cross bar of a climbing frame guide rail and the anti-falling swing block) at the front end part of a bearing surface of the anti-falling swing block by using an electronic feeler gauge and a horizontal guiding rule, measuring the verticality (an angle 1 shown in figure 3) of the bearing surface and a rear side surface by using an angle gauge, and recording data; performing initial ultrasonic flaw detection, detecting the original defects of the anti-falling swing block to be detected, including the defects of bubbles, cracks and the like, by using an ultrasonic flaw detector, and recording the result;
s3, performing impact test by using the simple anti-falling swing block impact resistance test device (shown in figure 2), installing the swing block to be tested on the wall-attached support, keeping good contact with the load transfer structure, and lifting the balance weight
To effective experimental height
(ii) a After the impact block is stable, opening the automatic unhooking to release the impact block; the impact load is transferred to the specified bearing section of the anti-falling swinging block through the rigid load transfer structure; after the impact test is finished, detaching the anti-falling swinging block;
s4, measuring test data, namely measuring the flatness of the bearing section at the front end part of the bearing surface of the anti-falling swinging block after the test by using an electronic feeler gauge and a horizontal guiding rule, measuring the verticality (shown as an angle 2 in the figure 3) of the bearing surface and the back side surface by using an angle rule, determining the deformation of the bearing section of the anti-falling swinging block according to the verticality and the flatness measured by the feeler gauge and a trigonometric function relation, and if a test sample is broken, not measuring;
s5, carrying out ultrasonic flaw detection after the test, and using an ultrasonic flaw detector to detect whether cracks are formed in the interior or on the surface of the tested component;
s6, judging that the bearing component has no obvious defects such as plastic deformation, cracks and the like according to the inspection requirements of the inspection standard of the lifting equipment for building construction; when the plastic deformation value of the bearing section exceeds 3mm (experimental empirical value), the plastic deformation is considered to be obvious, so that excessive extrusion between the guide rail and the outer side guide wheel is caused, the cross rod and the bearing surface are in lap joint and offset, potential safety hazards are formed, and the quality is judged to be unqualified; in the test, the anti-falling swinging block is made of cast steel, and according to relevant regulations of the section 1 of ultrasonic detection of steel castings, when cracks are detected in the inner or outer surface of the component, the quality of the component is judged to be unqualified.
For the convenience of understanding the above technical aspects of the present invention, the following detailed description will be given of the above technical aspects of the present invention in terms of specific modes of use.
When the device is used specifically, S1 calculates the effective test height according to potential energy equivalent; s2, measuring flatness and verticality initial flaw detection; s3, carrying out an impact experiment; s4, measuring the flatness and the verticality of the tested component and performing flaw detection; s5, comparing the measured data and the flaw detection data before and after the experiment to obtain the plastic deformation of the component and the internal cracks caused by impact; s6, judging whether the quality of the component is qualified or not, and achieving the purpose of ensuring the quality of the anti-falling swing block during use.
In conclusion, by means of the technical scheme, the problem that a method for testing the shock resistance of the anti-falling swing block of the climbing frame is lacked at present can be solved, so that the mechanical property of the anti-falling swing block is comprehensively judged according to the bearing surface flatness, the perpendicularity of the bearing surface and the rear side surface and flaw detection items obtained by tests, a good test effect is achieved, and the quality of the anti-falling swing block in use is guaranteed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. A method for detecting the shock resistance of an anti-falling swing block is characterized by comprising the following steps:
s1, calculating the effective test height according to potential energy equivalence: according to
Calculating to obtain effective test height
Wherein, in the step (A),
represents the total weight of the dead load and the live load in the range of the machine position,
the triggering distance of the anti-falling swing block is shown,
showing the weight of the test impact block,
represents the effective test height;
s2, measuring flatness and verticality initial flaw detection: measuring the initial flatness and the verticality of the anti-falling swing block, measuring the flatness of the bearing surface of the swing block to be detected and the verticality of the bearing surface and the rear side surface by using a feeler gauge and an angle gauge, detecting internal defects or cracks of a component by using an ultrasonic flaw detector, and recording original measurement data and flaw detection results;
s3, carrying out an impact experiment: according to the effective test height obtained by the calculation of the S1, a simple anti-falling swinging block impact resistance test device is used for carrying out an impact test, and after the test is finished, the anti-falling swinging block is detached;
s4, measuring the flatness and the verticality of the component after the experiment and carrying out flaw detection: measuring test data, measuring the flatness of the bearing surface of the anti-falling swing block and the perpendicularity of the bearing surface and the rear side surface again, checking whether cracks exist in the component by using an ultrasonic flaw detector, and recording the data; if the test sample is broken, the measurement is not carried out;
s5, comparing the measured data and the flaw detection data before and after the experiment to obtain the plastic deformation of the component and the internal cracks caused by impact: determining the deformation and the newly added cracks inside, comparing the measured data before and after the test to obtain the plastic deformation and the verticality variation of the bearing section, and comparing the flaw detection results of the sample before and after the test to obtain the internal defects or cracks caused by impact;
s6, judging whether the component quality is qualified: the conclusion judges that the bearing component has no obvious defects of plastic deformation, cracks and the like according to the requirements of 'inspection standards of lifting equipment for building construction'; when the plastic deformation value of the bearing section exceeds 3mm, the plastic deformation occurs obviously, so that excessive extrusion between the guide rail and the outer guide wheel can be caused, and the cross rod and the bearing surface are in lap joint and offset to form potential safety hazards; the quality grade of the anti-falling swinging block is judged according to relevant regulations of steel casting ultrasonic detection part 1, and the quality is unqualified when cracks are detected in the component or on the outer side.
2. The method for detecting the impact resistance of the anti-falling swing block according to claim 1, wherein the effective test height in the S1 is
And controlling the thickness to be within 6 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210523079.0A CN115265989B (en) | 2022-05-13 | 2022-05-13 | Detection method for impact resistance of anti-falling swing block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210523079.0A CN115265989B (en) | 2022-05-13 | 2022-05-13 | Detection method for impact resistance of anti-falling swing block |
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| CN115265989B CN115265989B (en) | 2024-06-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205175961U (en) * | 2015-12-04 | 2016-04-20 | 合肥正明机械有限公司 | Wear resistant cast iron spare impact specimen's casting detection device |
| CN110658057A (en) * | 2019-11-13 | 2020-01-07 | 合肥工业大学 | Method and device for measuring section deformation of circular pipe in drop hammer impact test |
| CN110987500A (en) * | 2019-12-17 | 2020-04-10 | 中交路桥建设有限公司 | Bridge static load test method |
| CN111413219A (en) * | 2020-05-21 | 2020-07-14 | 上海应用技术大学 | Pendulum impact experiment machine and experiment system |
| JP6860256B1 (en) * | 2019-11-26 | 2021-04-14 | ▲広▼州大学 | Equipment for testing the impact resistance of beam column structural members |
-
2022
- 2022-05-13 CN CN202210523079.0A patent/CN115265989B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205175961U (en) * | 2015-12-04 | 2016-04-20 | 合肥正明机械有限公司 | Wear resistant cast iron spare impact specimen's casting detection device |
| CN110658057A (en) * | 2019-11-13 | 2020-01-07 | 合肥工业大学 | Method and device for measuring section deformation of circular pipe in drop hammer impact test |
| JP6860256B1 (en) * | 2019-11-26 | 2021-04-14 | ▲広▼州大学 | Equipment for testing the impact resistance of beam column structural members |
| CN110987500A (en) * | 2019-12-17 | 2020-04-10 | 中交路桥建设有限公司 | Bridge static load test method |
| CN111413219A (en) * | 2020-05-21 | 2020-07-14 | 上海应用技术大学 | Pendulum impact experiment machine and experiment system |
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| CN115265989B (en) | 2024-06-18 |
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