CN109883832B - Detection method for detecting sag of vehicle door structure - Google Patents
Detection method for detecting sag of vehicle door structure Download PDFInfo
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- CN109883832B CN109883832B CN201910180128.3A CN201910180128A CN109883832B CN 109883832 B CN109883832 B CN 109883832B CN 201910180128 A CN201910180128 A CN 201910180128A CN 109883832 B CN109883832 B CN 109883832B
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- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 15
- 238000012795 verification Methods 0.000 claims abstract description 15
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 238000004088 simulation Methods 0.000 claims abstract description 13
- 238000000691 measurement method Methods 0.000 claims abstract description 8
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- 238000010200 validation analysis Methods 0.000 claims 1
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000007665 sagging Methods 0.000 description 6
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Abstract
The invention relates to the field of vehicle door sag detection, in particular to a detection method for detecting vehicle door structure sag, wherein a vehicle door structure is connected with a vehicle body structure through a vehicle door hinge; the detection method comprises a test verification measurement method and a CAE simulation analysis method. According to the invention, the counterweight is added on the vehicle door structure, so that the droop load is added on the vehicle door, the downward movement amount of the corresponding position of the vehicle door is measured by the dial indicator, the droop of the vehicle door structure can be obtained by calculation, and meanwhile, the sag resistance of the vehicle door can be obtained by arranging data through multiple measurements, so that the actual production requirement can be better met; meanwhile, the downward movement amount of the vehicle door structure measured by the CAE simulation analysis method is compared with the downward movement amount of the vehicle door structure measured by the test verification measurement method, so that the accuracy of the detection method is ensured.
Description
Technical Field
The invention relates to the field of vehicle door sag detection, in particular to a detection method for vehicle door structure sag detection.
Background
Sedan door structure sag is a phenomenon often encountered during assembly, testing and use of a vehicle. The main expression of the door structure is the sagging deformation of the door structure under the action of instantaneous door sagging caused by self weight and vertical external load. The deformation can cause the friction between the car door and an adjacent part in the using process, even can influence the normal closing of the car door in serious conditions, and has the phenomenon of untight closing or difficult closing. Therefore, in the design process of the car, the sag resistance can be taken as one of the very important performance parameters in the performance of the structural system of the car door; a detection method that can be used for detecting the sagging of the door structure is now required.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a detection method for detecting the sagging of a vehicle door structure.
In order to achieve the purpose, the invention adopts the technical scheme that:
a detection method for detecting the sag of a vehicle door structure is characterized in that the vehicle door structure is connected with a vehicle body structure through a vehicle door hinge; the detection method comprises a test verification measurement method; the test verification and measurement method comprises the following steps
(1) Fixing a vehicle body structure to be measured;
(2) selecting a vehicle door structure to be detected, and determining a loading point and a measuring point of the vehicle door;
(3) after the step (2) is finished, connecting a dial indicator for measuring the downward movement amount of the vehicle door at the measuring point, after the dial indicator is connected, adding a counter weight to the loading point to apply a vertical force to the loading point, measuring the downward movement amount of the vehicle door at the measuring point through the dial indicator, and recording;
(4) and (4) after the step (3) is finished, finishing the detection of the downward movement amount of one vehicle door, and repeating the steps (2) - (3) if other vehicle door structures on the vehicle body need to be detected.
In the step (2), the loading point and the measuring point are positioned at two positions of the same vehicle door structure; and the loading point and the measuring point are at the same distance from the door hinge.
The measuring points in the step (2) are projected and mapped to the car door structure through loading points; and the loading point and the measuring point are on the same horizontal plane, and the measuring point and the loading point are on the same circumference.
The detection method also comprises a CAE simulation analysis method; when the CAE simulation analysis method is operated, the same measuring point and loading point are selected as those of the test verification method.
And comparing the vehicle door structure downward movement amount measured by using the CAE simulation analysis method with the vehicle door structure downward movement amount measured by using a test verification method.
The loading point in the step (2) is at a door lock in the vehicle door structure.
The measuring point in the step (2) is positioned on the outer plate of the vehicle door.
The measuring point is located on the outer side surface of the outer plate of the vehicle door.
The invention has the advantages that:
the invention discloses a detection method for detecting the sag of a vehicle door structure, which is characterized in that a counterweight is additionally arranged on the vehicle door structure to increase the sag load of a vehicle door, meanwhile, the downward movement amount of the corresponding position of the vehicle door is measured through a dial indicator, the sag of the vehicle door structure can be obtained through calculation, meanwhile, the sag resistance of the vehicle door can be obtained through data arrangement through multiple measurements, and the actual production requirement can be better met.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of the present invention in use.
The labels in the above figures are:
1. door structure, 2, automobile body, 3, measuring point, 4, loading point.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
A detection method for detecting the sagging of a vehicle door structure, wherein the vehicle door structure is connected with a vehicle body structure 2 through a vehicle door hinge; the detection method comprises a test verification measurement method; the test verification and measurement method comprises the following steps
(1) Fixing a vehicle body structure 2 to be measured;
(2) selecting a vehicle door structure 1 to be detected, and determining a loading point 4 and a measuring point 3 of the vehicle door;
(3) after the step (2) is finished, connecting a dial indicator 5 for measuring the downward movement amount of the vehicle door at the measuring point 3, after the dial indicator 5 is connected, adding a counter weight to the loading point 4 to apply a vertical force to the loading point 4, and measuring the downward movement amount of the vehicle door at the measuring point 3 by the dial indicator 5 and recording the downward movement amount;
(4) and (4) after the step (3) is finished, finishing the detection of the downward movement amount of one vehicle door, and repeating the steps (2) - (3) if other vehicle door structures 1 on the vehicle body need to be detected.
The invention discloses a detection method for detecting the sag of a vehicle door structure, wherein the actual vehicle door structure 1 comprises a vehicle door outer plate and a vehicle door inner plate, and based on the structure, in order to better measure the sag of the vehicle door structure 1, when in use, a dial indicator 5 is connected to a measuring point 3, the dial indicator 5 is a known structure, the connection mode of the dial indicator 5 is also a known technology, the dial indicator 5 is arranged in order to better realize the subsequent downward movement amount of the vehicle door structure 1, when in use, a counterweight is added to a loading point 4, so that the vehicle door structure 1 is subjected to downward external force, the vehicle door is subjected to downward movement amount, and the detection method can be used for simulating the sag of the vehicle door structure 1 when being subjected to the external force, and further realize the detection of the sag of the vehicle door structure 1.
Preferably, in the step (2) of the present invention, the loading point 4 and the measuring point 3 are located at two positions of the same door structure 1; and the distance between the loading point 4 and the measuring point 3 is the same as the distance between the door hinge and the door hinge; through the operation mode, the loading point 4 and the measuring point 3 are located at two different positions of the vehicle door structure 1, so that the phenomenon that even if the local rigidity of the loading point 4 is insufficient and local large displacement is generated, the sagging result is not greatly influenced is avoided; the accuracy of detecting the sag of the vehicle door structure 1 is better ensured to a certain extent; as a greater optimization, the measuring point 3 in the step (2) is projected and mapped onto the vehicle door structure 1 through the loading point 4; the loading point 4 and the measuring point 3 are on the same horizontal plane, and the measuring point 3 and the loading point 4 are on the same circumference; the arrangement is such that the distance from the loading point 4 to the axis of the door hinge is equal to the distance from the measuring point 3 to the axis of the door hinge, so that the deformation occurring at the hinge due to a vertical external load applied to the door does not change much in value transmitted to the measuring point 3, since here mainly the longitudinal displacement of the vehicle, the measuring point 3 and the loading point 4 are in the same plane, since the errors due to the difference in position can be substantially eliminated; meanwhile, the distance between the loading point 4 and the measuring point 3 to the hinge axis of the vehicle door is ensured, so that the problem that the distance between the measuring point 3 and the hinge axis is greatly different from the distance between the loading point 4 and the hinge axis when the measuring point near the waist line of the outer plate is measured in the traditional method is solved, and the actual detection precision is better ensured to a certain extent.
Preferably, the detection method of the present invention further comprises a CAE simulation analysis method; selecting the same measuring point 3 and loading point 4 as the test verification method during the operation of the CAE simulation analysis method; the CAE simulation analysis method can be used for verification, meanwhile, fewer parts are needed in the CAE simulation analysis method, and the vehicle door structure 1 can be detected conveniently; meanwhile, the downward movement amount of the vehicle door structure 1 measured by the CAE simulation analysis method is compared with the downward movement amount of the vehicle door structure 1 measured by the test verification method, so that the downward movement amounts measured by two modes can be compared, a mutual verification effect is achieved, and the accuracy of detecting the sag of the vehicle door structure 1 is better ensured to a certain extent.
Preferably, the loading point 4 in the step (2) in the invention is at the door lock in the door structure 1; the counterweight is convenient to increase and decrease, and the subsequent operation is convenient.
Preferably, the measuring point 3 in the step (2) is located on the outer panel of the door in the invention; because the strength of the outer plate is higher, the dial indicator 5 is convenient to connect, and meanwhile, the measuring point 3 is positioned on the outer side surface of the outer plate of the vehicle door; the data reading is convenient, and the actual operation is also convenient.
The dial indicator 5 of the invention can adopt the structure disclosed in fig. 2, and meanwhile, when the balance weight is added to the vehicle body structure 2, the balance weight mechanism 6 can be used, the balance weight mechanism 6 comprises a hook and a balance weight block, the hook can be connected with a door lock, and the balance weight block is added to the hook to realize the operation of applying external force to the vehicle door structure 1, for example, as shown in fig. 2. Meanwhile, in order to reduce the cheapness of the vehicle door structure 1, the detection method disclosed by the invention further comprises the air cylinder part 7, wherein the air cylinder part 7 is arranged on the inner side of the vehicle door and used for abutting against the vehicle door structure 1 from the inner side of the vehicle door structure 1 to play a limiting role and avoid the rotation of the vehicle door structure 1, and meanwhile, in order to avoid the influence of the air cylinder part 7 on the detection structure, a piston rod in the air cylinder part 7 is only contacted with the vehicle door and is not connected with the vehicle door, so that the phenomenon that the sag of the vehicle door structure 1 is influenced due to the existence of the air cylinder part 7 is avoided.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (3)
1. A detection method for detecting the sag of a vehicle door structure is characterized in that the vehicle door structure is connected with a vehicle body structure through a vehicle door hinge; the detection method is characterized by comprising a test verification measurement method; the test verification and measurement method comprises the following steps
(1) Fixing a vehicle body structure to be measured;
(2) selecting a vehicle door structure to be detected, and determining a loading point and a measuring point of the vehicle door; the loading point and the measuring point are positioned at two positions of the same vehicle door structure; the distance between the loading point and the measuring point is the same as that between the measuring point and the door hinge;
the measuring points are projected and mapped to the car door structure through the loading points; the loading point and the measuring point are positioned on the same horizontal plane, and the measuring point and the loading point are positioned on the same circumference;
the loading point is positioned at a door lock in the vehicle door structure;
the measuring point is positioned on the outer plate of the vehicle door;
the measuring point is positioned on the outer side surface of the outer plate of the vehicle door;
(3) after the step (2) is finished, connecting a dial indicator for measuring the downward movement amount of the vehicle door at the measuring point, after the dial indicator is connected, adding a counter weight to the loading point to apply a vertical force to the loading point, measuring the downward movement amount of the vehicle door at the measuring point through the dial indicator, and recording;
(4) and (4) after the step (3) is finished, finishing the detection of the downward movement amount of one vehicle door, and repeating the steps (2) - (3) if other vehicle door structures on the vehicle body need to be detected.
2. The method of claim 1, further comprising a CAE simulation analysis method; when the CAE simulation analysis method is operated, the same measuring point and loading point are selected as those of the test verification method.
3. The method of claim 2, wherein the door structure down-shift measured using the CAE simulation analysis method is compared to the door structure down-shift measured using a test validation method.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910180128.3A CN109883832B (en) | 2019-03-11 | 2019-03-11 | Detection method for detecting sag of vehicle door structure |
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| CN201910180128.3A CN109883832B (en) | 2019-03-11 | 2019-03-11 | Detection method for detecting sag of vehicle door structure |
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| CN109883832A CN109883832A (en) | 2019-06-14 |
| CN109883832B true CN109883832B (en) | 2021-07-30 |
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Citations (3)
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|---|---|---|---|---|
| KR100439808B1 (en) * | 1997-12-19 | 2004-09-30 | 현대자동차주식회사 | Door-deflection measuring device for vehicle for simplifying measurement of door-deflection degree |
| CN202145162U (en) * | 2011-07-12 | 2012-02-15 | 上海宏昌汽配有限公司 | Vehicle door hinge assembly sinking test booster |
| CN204329928U (en) * | 2014-12-20 | 2015-05-13 | 北汽银翔汽车有限公司 | A kind of sagging measurement frock based on car door durable test |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916322A (en) * | 2010-09-07 | 2010-12-15 | 上海奕代汽车技术有限公司 | Optimization design method for sagging problem of car door based on CAE (Computer Aided Engineering) structural analysis |
| CN203615908U (en) * | 2013-10-25 | 2014-05-28 | 北京汽车股份有限公司 | Device for measuring sinkage quantity of automobile door |
| CN204177562U (en) * | 2014-09-30 | 2015-02-25 | 北京汽车股份有限公司 | Car door sinking test stand |
| CN104807654A (en) * | 2015-05-15 | 2015-07-29 | 北京汽车研究总院有限公司 | Automobile door sag testing bench system |
| CN105043206B (en) * | 2015-05-29 | 2018-09-25 | 神龙汽车有限公司 | A kind of quick testing agency of car door deflection |
| CN109308365B (en) * | 2017-07-28 | 2023-05-23 | 上海汽车集团股份有限公司 | Finite element modeling method of door hinge and door sagging stiffness simulation test method |
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2019
- 2019-03-11 CN CN201910180128.3A patent/CN109883832B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100439808B1 (en) * | 1997-12-19 | 2004-09-30 | 현대자동차주식회사 | Door-deflection measuring device for vehicle for simplifying measurement of door-deflection degree |
| CN202145162U (en) * | 2011-07-12 | 2012-02-15 | 上海宏昌汽配有限公司 | Vehicle door hinge assembly sinking test booster |
| CN204329928U (en) * | 2014-12-20 | 2015-05-13 | 北汽银翔汽车有限公司 | A kind of sagging measurement frock based on car door durable test |
Non-Patent Citations (1)
| Title |
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| 基于系统的轿车车门下沉刚度分析及结构优化;安林超;《兰州理工大学学报》;20161231;第４２卷(第６期);48-51 * |
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