CN112461524A - Testing method capable of simultaneously testing automatic locking strength of multiple containers - Google Patents
Testing method capable of simultaneously testing automatic locking strength of multiple containers Download PDFInfo
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- CN112461524A CN112461524A CN202011301180.9A CN202011301180A CN112461524A CN 112461524 A CN112461524 A CN 112461524A CN 202011301180 A CN202011301180 A CN 202011301180A CN 112461524 A CN112461524 A CN 112461524A
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- 238000012360 testing method Methods 0.000 title claims abstract description 124
- 238000012669 compression test Methods 0.000 claims abstract description 7
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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
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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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Abstract
The invention is suitable for the technical field of automatic container locks, and provides a test method capable of simultaneously testing the strength of automatic locks of a plurality of containers, which comprises the following steps: installing the tested automatic container lock: the automatic lock of the container to be tested is arranged on a testing machine, the automatic lock of the container to be tested is positioned at a first preset angle, and the specification of the testing machine is 50-8000 kN; compression test of the automatic lock of the tested container: loading the test force of the tester from 50kN at a loading speed of 20-60 kN/s, keeping for 10-50 min after the test force is added to the test load, and then unloading; the invention tests and observes the tested automatic container lock, loads the container lock step by step according to the observation result and repeats the operation until determining the pressure range capable of realizing the damage to the tested automatic container lock, and has the advantages of simplicity, convenience, intuition, strong operability, reliable and accurate data, high testing efficiency and the like.
Description
Technical Field
The invention belongs to the technical field of automatic container locks, and particularly relates to a testing method capable of testing the strength of automatic locks of a plurality of containers simultaneously.
Background
Container locks (automatic container locks), container transport is the safest carrier for modern freight transport, and security is the "lifeline" of container transport. Once the box body carrying dozens of tons of heavy goods slides or turns over to separate from the vehicle body, immeasurable loss is brought to the safety of human life and property. Therefore, the container and the vehicle body are fixedly connected through a special lock. According to the relevant regulations of the ministry of public communications of the people's republic of China, namely the regulations on the management of road freight transportation and stations (No. 6 in 2005) and the regulations on the transportation of container automobiles (No. 1283 in 1995), vehicles engaged in container transportation are required to be equipped with twist lock devices for fixing containers.
The container lock aims at ensuring the connection and fastening of a container in the transportation process, so that whether the strength of the container lock reaches the standard is very important, the strength of the container lock is tested by the conventional testing method by applying a tensile force to an object to observe the deformation process of the object, the resistance of a strength testing inspection program to abnormal conditions is used for checking whether the performance reduction amplitude of a system is within an allowable range when the system operates in a limit state, and the strength test is required for ensuring the product quality before the automatic container lock is used.
However, the existing testing method is difficult to effectively test whether the strength of the container lock reaches the standard, judge the specific compressive strength of the container lock and have low testing efficiency.
Disclosure of Invention
The invention provides a test method capable of simultaneously testing the strength of automatic locks of a plurality of containers, and aims to solve the problems that the existing test method in the background art is difficult to effectively test whether the strength of the container locks reaches the standard, is difficult to judge the specific compressive strength of the container locks, and has low test efficiency.
The invention is realized in this way, a testing method for testing the automatic locking strength of a plurality of containers simultaneously, comprising the following steps:
s1, installing the tested automatic container lock: the automatic lock of the container to be tested is arranged on a testing machine, the automatic lock of the container to be tested is positioned at a first preset angle, and the specification of the testing machine is 50-8000 kN;
s2, compression test of the tested automatic container lock: loading the test force of the tester from 50kN at a loading speed of 20-60 kN/s, keeping for 10-50 min after the test force is added to the test load, and then unloading;
s3, observing the automatic lock of the tested container: taking down the tested automatic container lock from the testing machine, and observing the surface, the base body and the combination area of the surface and the base body of the tested automatic container lock by naked eyes, a magnifying lens of 20 times and a microscope of 250 times in sequence;
s4, if the tested container automatic lock is still intact and has no damage trace, increasing the corresponding test load by 50-200 kN each time, and repeating the operations of S2 and S3 in sequence until the tested container automatic lock is damaged;
s5, if the tested container automatic lock has micro-cracks, reducing the corresponding test load by 25-150 kN each time, and repeating the operations of S2 and S3 in sequence until the tested container automatic lock is damaged;
s6, replacing an identical tested container automatic lock with a tested container automatic lock, enabling the tested container automatic lock to be at a second preset angle, selecting the specification of the testing machine to be 50-8000 kN, repeating S3, and then selecting to carry out S4 or S5;
s7, recording the final test load of the automatic lock of the tested container in S4, S5 and S6, and calculating the compressive strength: compressive strength the final test load ÷ area of the plane of the automatic lock of the container under test.
Preferably, in S5, before repeating the operations of S2 and S3, the tested container automatic lock is replaced with the identical tested container automatic lock and the test is performed under the identical test conditions, wherein if the tested container automatic lock is still intact, the test load is increased by 20kN, and if the tested container automatic lock is damaged, the test load is decreased by 20 kN.
Preferably, in S1, the specification of the testing machine is 100 to 5000 kN.
Preferably, in S2, the test force of the tester is loaded from 50kN, the loading speed is 30kN/S, and after the test force is added, the test force is kept for 25min and then unloaded.
Preferably, in S4, if the tested container automatic lock is still intact and there is no damage trace, the corresponding test load is increased by 100kN each time.
Preferably, in S5, if the tested container is observed to have microcracks due to automatic locking, the corresponding test load is reduced by 75kN each time.
Compared with the prior art, the invention has the beneficial effects that: the automatic lock of the tested container is tested and observed, and the automatic lock of the tested container is loaded step by step according to the observation result and is repeatedly operated until the pressure range which can damage the automatic lock of the tested container is determined, the automatic lock of a new tested container can be repeatedly operated, the pressure value which can damage the automatic lock of the tested container is accurately determined, and the test precision of the automatic lock of the tested container is improved.
Drawings
FIG. 1 is a schematic flow chart of the preparation method of the present invention
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides a technical solution: a test method for testing the strength of automatic locks of a plurality of containers simultaneously comprises the following steps:
s1, installing the tested automatic container lock: the automatic lock of the container to be tested is arranged on a testing machine, the automatic lock of the container to be tested is positioned at a first preset angle, and the specification of the testing machine is 50-8000 kN;
s2, compression test of the tested automatic container lock: loading the test force of the tester from 50kN at a loading speed of 20-60 kN/s, keeping for 10-50 min after the test force is added to the test load, and then unloading;
s3, observing the automatic lock of the tested container: taking down the tested automatic container lock from the testing machine, and observing the surface, the base body and the combination area of the surface and the base body of the tested automatic container lock by naked eyes, a magnifying lens of 20 times and a microscope of 250 times in sequence;
s4, if the tested container automatic lock is still intact and has no damage trace, increasing the corresponding test load by 50-200 kN each time, and repeating the operations of S2 and S3 in sequence until the tested container automatic lock is damaged;
s5, if the tested container automatic lock has micro-cracks, reducing the corresponding test load by 25-150 kN each time, and repeating the operations of S2 and S3 in sequence until the tested container automatic lock is damaged;
s6, replacing an identical tested container automatic lock with a tested container automatic lock, enabling the tested container automatic lock to be at a second preset angle, selecting the specification of the testing machine to be 50-8000 kN, repeating S3, and then selecting to carry out S4 or S5;
s7, recording the final test load of the automatic lock of the tested container in S4, S5 and S6, and calculating the compressive strength: compressive strength the final test load ÷ area of the plane of the automatic lock of the container under test.
In the present invention, first, the automatic lock of the container under test is installed: the automatic lock of the container to be tested is arranged on a testing machine, the automatic lock of the container to be tested is positioned at a first preset angle, and the specification of the testing machine is 50-8000 kN; in the process of installing the automatic lock of the tested container, when the automatic lock of the tested container is in a first preset angle, the first preset angle is set by a worker according to the requirement of the test, and the plane of the tester for applying pressure to the automatic lock of the tested container is a first stressed plane; secondly, the compression test of the automatic lock of the tested container: loading the test force of the tester from 50kN at a loading speed of 20kN/s, keeping for 10min after the test force is added to the test load, and then unloading, wherein the tester uniformly applies pressure to a first stress plane of the tested container in the process; again, observe the container auto-lock being tested: the tested automatic container lock is taken down from the testing machine, the surface, the base body and the combination area of the surface and the base body of the tested automatic container lock are observed by naked eyes, a magnifying glass with 20 times and a microscope with 250 times in sequence, the condition of the area is recorded in detail, and the following operation is judged according to the following standards: if the tested automatic container lock is still intact and has no damage trace, the corresponding test load is increased by 50kN each time, and the operations of S2 and S3 are repeated in sequence until the tested automatic container lock is damaged; if the tested container automatic lock has micro cracks, reducing the corresponding test load by 25kN each time, and repeating the operations of S2 and S3 in sequence until the tested container automatic lock is damaged; the pressure bearing range of the first stress plane is obtained by increasing the test load or reducing the test load step by step; thirdly, replacing an identical tested container automatic lock to be installed on the testing machine, enabling the tested container automatic lock to be at a second preset angle, wherein the second preset angle can be the same as or different from the first preset angle, selecting the specification of the testing machine to be 50-8000 kN, repeating S3, and then selecting to carry out S4 or S5, so that a plurality of tested container automatic locks can be used for detection, the amount of detected samples is ensured, and the testing accuracy is further improved; finally, the final test load of the automatic locks of the containers tested in S4, S5 and S6 was recorded, and the compressive strength was calculated: the compression strength data is statistically analyzed by dividing the final test load by the area of the automatic locking plane of the container to be tested.
Preferably, in S5, before repeating the operations of S2 and S3, the tested container automatic lock is replaced with the identical tested container automatic lock and the test is performed under the identical test conditions, wherein if the tested container automatic lock is still intact, the test load is increased by 20kN, and if the tested container automatic lock is damaged, the test load is decreased by 20 kN.
In S1, the specification of the testing machine is 100-5000 kN.
In S2, the test force of the tester is loaded from 50kN, the loading speed is 30kN/S, the test force is kept for 25min after the loading is added, and then the test force is unloaded.
In S4, if the tested container automatic lock is still intact and there is no damage trace, the corresponding test load is increased by 100kN each time.
At S5, if the container under test is observed to have auto-lock microcracks, the corresponding test load is reduced by 75kN each time.
In order to further illustrate the present invention, the following will describe a steel for drill rods and a method for manufacturing the same in detail with reference to the examples, which should not be construed as limiting the scope of the present invention.
Example 1
A test method for testing the strength of automatic locks of a plurality of containers simultaneously comprises the following steps:
s1, installing the tested automatic container lock: the automatic lock of the container to be tested is arranged on a testing machine, the automatic lock of the container to be tested is positioned at a first preset angle, and the specification of the testing machine is 50-8000 kN;
s2, compression test of the tested automatic container lock: loading the test force of the tester from 50kN at the loading speed of 30kN/s, keeping for 30min after adding the test load, and then unloading;
s3, observing the automatic lock of the tested container: taking down the tested automatic container lock from the testing machine, and observing the surface, the base body and the combination area of the surface and the base body of the tested automatic container lock by naked eyes, a magnifying lens of 20 times and a microscope of 250 times in sequence;
s4, the automatic lock of the tested container is still intact and has no damage trace, the corresponding test load is increased by 50kN each time, and the operations of S2 and S3 are repeated in sequence until the automatic lock of the tested container is damaged;
s6, replacing an identical tested container automatic lock with the tested container automatic lock, enabling the tested container automatic lock to be at a second preset angle, selecting the specification of the testing machine to be 50-8000 kN, repeating S3, and then carrying out S4;
s7, recording the final test load of the automatic lock of the tested container in S4, S5 and S6, and calculating the compressive strength: compressive strength the final test load ÷ area of the plane of the automatic lock of the container under test.
Example 2
A test method for testing the strength of automatic locks of a plurality of containers simultaneously comprises the following steps:
s1, installing the tested automatic container lock: the automatic lock of the container to be tested is arranged on a testing machine, the automatic lock of the container to be tested is positioned at a first preset angle, and the specification of the testing machine is 50-8000 kN;
s2, compression test of the tested automatic container lock: loading the test force of the tester from 50kN at a loading speed of 50kN/s, keeping for 40min after adding the test load, and then unloading;
s3, observing the automatic lock of the tested container: taking down the tested automatic container lock from the testing machine, and observing the surface, the base body and the combination area of the surface and the base body of the tested automatic container lock by naked eyes, a magnifying lens of 20 times and a microscope of 250 times in sequence;
s5, when the tested container automatic lock has micro cracks, reducing the corresponding test load by 25kN each time, and repeating the operations of S2 and S3 in sequence until the tested container automatic lock is damaged;
s6, replacing an identical tested container automatic lock with a tested container automatic lock, enabling the tested container automatic lock to be at a second preset angle, selecting the specification of the testing machine to be 50-8000 kN, repeating S3, and then selecting to perform S5;
s7, recording the final test load of the automatic lock of the tested container in S4, S5 and S6, and calculating the compressive strength: compressive strength the final test load ÷ area of the plane of the automatic lock of the container under test.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A test method capable of testing the automatic lock strength of a plurality of containers simultaneously is characterized by comprising the following steps:
s1, installing the tested automatic container lock: the automatic lock of the container to be tested is arranged on a testing machine, the automatic lock of the container to be tested is positioned at a first preset angle, and the specification of the testing machine is 50-8000 kN;
s2, compression test of the tested automatic container lock: loading the test force of the tester from 50kN at a loading speed of 20-60 kN/s, keeping for 10-50 min after the test force is added to the test load, and then unloading;
s3, observing the automatic lock of the tested container: taking down the tested automatic container lock from the testing machine, and observing the surface, the base body and the combination area of the surface and the base body of the tested automatic container lock by naked eyes, a magnifying lens of 20 times and a microscope of 250 times in sequence;
s4, if the tested container automatic lock is still intact and has no damage trace, increasing the corresponding test load by 50-200 kN each time, and repeating the operations of S2 and S3 in sequence until the tested container automatic lock is damaged;
s5, if the tested container automatic lock has micro-cracks, reducing the corresponding test load by 25-150 kN each time, and repeating the operations of S2 and S3 in sequence until the tested container automatic lock is damaged;
s6, replacing an identical tested container automatic lock with a tested container automatic lock, enabling the tested container automatic lock to be at a second preset angle, selecting the specification of the testing machine to be 50-8000 kN, repeating S3, and then selecting to carry out S4 or S5;
s7, recording the final test load of the automatic lock of the tested container in S4, S5 and S6, and calculating the compressive strength: compressive strength the final test load ÷ area of the plane of the automatic lock of the container under test.
2. The method as claimed in claim 1, wherein in the step S5, before repeating the operations of S2 and S3, an identical automatic lock of the container to be tested is replaced and tested under identical test conditions, and if the automatic lock of the container to be tested is still intact, the test load is increased by 20kN, and if the automatic lock of the container to be tested is damaged, the test load is decreased by 20 kN.
3. The method as claimed in claim 1, wherein in S1, the testing machine has a specification of 100-5000 kN.
4. The method as claimed in claim 1, wherein in S2, the testing force of the testing machine is loaded from 50kN, the loading speed is 30kN/S, and after adding the testing force to the testing load, the testing force is maintained for 25min, and then the testing force is unloaded.
5. The method as claimed in claim 1, wherein in the step S4, if the tested automatic locks of the containers are still intact and there is no damage trace, the corresponding test load is increased by 100kN each time.
6. The method as claimed in claim 1, wherein in step S5, if the tested automatic lock of the container has micro cracks, the corresponding test load is reduced by 75kN each time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011301180.9A CN112461524A (en) | 2020-11-19 | 2020-11-19 | Testing method capable of simultaneously testing automatic locking strength of multiple containers |
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| CN202011301180.9A CN112461524A (en) | 2020-11-19 | 2020-11-19 | Testing method capable of simultaneously testing automatic locking strength of multiple containers |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854068A (en) * | 2012-09-10 | 2013-01-02 | 昆山吉海实业公司 | Container lock shearing strength detection tooling method |
| CN102890032A (en) * | 2012-10-17 | 2013-01-23 | 昆山吉海实业公司 | Method for strength detection tool for fixed hook of container |
| CN103048196A (en) * | 2012-12-20 | 2013-04-17 | 天津工程机械研究院 | Compressive strength test method for surface strengthening layer and substrate of axial part |
| CN103808566A (en) * | 2013-12-19 | 2014-05-21 | 余姚市电波机械有限公司 | Compressive strength testing method of shaft |
| CN203705147U (en) * | 2013-09-30 | 2014-07-09 | 苏州卓胜工贸有限公司 | Intensity testing tool for automatic lock of container |
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2020
- 2020-11-19 CN CN202011301180.9A patent/CN112461524A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854068A (en) * | 2012-09-10 | 2013-01-02 | 昆山吉海实业公司 | Container lock shearing strength detection tooling method |
| CN102890032A (en) * | 2012-10-17 | 2013-01-23 | 昆山吉海实业公司 | Method for strength detection tool for fixed hook of container |
| CN103048196A (en) * | 2012-12-20 | 2013-04-17 | 天津工程机械研究院 | Compressive strength test method for surface strengthening layer and substrate of axial part |
| CN203705147U (en) * | 2013-09-30 | 2014-07-09 | 苏州卓胜工贸有限公司 | Intensity testing tool for automatic lock of container |
| CN103808566A (en) * | 2013-12-19 | 2014-05-21 | 余姚市电波机械有限公司 | Compressive strength testing method of shaft |
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Application publication date: 20210309 |