CN107505142B - Device and method for testing dynamic bending resistance of automobile side column touch key piece - Google Patents
Device and method for testing dynamic bending resistance of automobile side column touch key piece Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 121
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Abstract
The invention aims to provide a device and a method for testing the dynamic bending resistance of a side column collision key piece of an automobile, which are used for overcoming the defects of more resource consumption and long development period caused by the fact that a whole automobile collision test is often adopted in the development of the safety performance of the side column collision of the existing automobile; the test device comprises a support assembly arranged on a rigid wall and used for fixing a test piece, and a collision structure used for applying dynamic impact force to the test piece. The dynamic impact test is carried out on the test piece arranged on the bracket assembly through the collision structure, the bending resistance of the test piece under high-speed impact can be simulated, and the deformation speed of the test piece is consistent with that in the whole vehicle side column collision test, so that the test piece can be optimized and designed more accurately and efficiently; and support assembly and collision structure commonality are wide, simple structure, and is with low costs, easily builds, and the installation is dismantled conveniently, can reuse, many times of experiment.
Description
Technical Field
The invention belongs to the technical field of automobile safety design, and relates to a design of a test method for the dynamic bending resistance of automobile parts. Specifically, the invention relates to a device and a method for testing the dynamic bending resistance of a side column key piece of an automobile.
Background
The automobile side column collision is an important collision safety test item for examining the collision prevention performance of the automobile side besides the side collision. The side pole collision is a conventional test item in national regulations such as European Latin and automobile evaluation regulations at present, and is likely to be introduced into C-NCAP or related Chinese regulations in the future. Therefore, the side impact performance of automobiles is becoming more and more important, whether for the export needs of the china brand of automobiles or in preparation for future domestic regulations.
At present, the research on the side column collision test mainly focuses on using a column in the Euro-NCAP specification to collide with a whole vehicle, and investigating the damage values of the head, the chest, the abdomen and the pelvis of a dummy so as to evaluate the safety performance of the vehicle body structure. According to the requirements of Euro-NCAP, the experiment is prepared, in the collision process, the center of a cylinder is over against the gravity center of the head of the dummy, the collision position of the cylinder and the whole vehicle is in front of a B column, key parts which are directly collided are an upper A column, a front door anti-collision beam and a doorsill, and the direct collision with the B column cannot occur. Therefore, the upper A column, the front door anti-collision beam and the doorsill form main key parts of the side column collision middle side, and the bending degree of the upper A column, the front door anti-collision beam and the doorsill in the side column collision process is directly related to the protection performance of the side.
In the development of the safety performance of the side pillar collision of the automobile, the threshold and the front door collision-proof beam are often optimized according to the results of a whole automobile collision test and a whole automobile collision simulation, the method consumes more resources and has a long development period, and the safety of the automobile body structure is rarely verified by adopting an automobile body structure part test at present. In fact, a testing device and a method for evaluating the side pillar collision performance by independently testing the dynamic bending resistance of the doorsill and the anti-collision beam are still blank at present.
Disclosure of Invention
The invention aims to provide a device and a method for testing the dynamic bending resistance of a side column collision key piece of an automobile, so as to overcome the defects of more resource consumption and long development period caused by the fact that a whole automobile collision test is often adopted in the existing automobile side column collision safety performance development, and thus, the key piece is more accurately and efficiently optimized and designed.
The technical scheme adopted by the invention is as follows: the utility model provides a car side post is bumped key spare developments bending resistance's testing arrangement, is including installing the support assembly that is used for fixed test piece on the rigid wall and being used for exerting the collision structure of dynamic impact force to the test piece. During testing, a sample piece used by a single punched or rolled real vehicle is used as a test piece, dynamic impact testing is carried out on the test piece arranged on a bracket assembly through a collision structure, a proper trolley collision initial speed is selected to ensure that the deformation speed of the test piece is consistent with that in the whole vehicle side column collision test, and the dynamic bending resistance of the test piece can be determined by combining corresponding simulation of part tests and whole vehicle collision simulation according to the actual stress and deformation of the test piece in the test, so that the test piece is more accurately and efficiently optimized and designed; and support assembly and collision structure commonality are wide, simple structure, and is with low costs, easily builds, and the installation is dismantled conveniently, can reuse, many times of experiment.
Further, the support assembly comprises a left support and a right support, the left support is composed of a left support body and a left support connecting portion arranged at the front end of the left support body, and the right support is composed of a right support body and a right support connecting portion arranged at the front end of the right support body. The support assembly realizes firm support and fixation to the test piece through the left and right support bodies and the left and right support connecting parts, and can ensure the balance of the test piece, so that the test result is more accurate.
Furthermore, the left support connecting part is a rectangular groove formed by combining two angle steels, the right support connecting part is a steel plate, and the steel plate is provided with a mounting hole. By the design, one end of the test piece can be fixedly connected, and the other end of the test piece can freely slide in the rigid rectangular groove without adding restraint, so that the test piece is integrally formed into a structural form of a simply supported beam; if both ends are fixedly connected, one is equivalent to adding an energy absorbing piece, so that the test piece cannot be independently inspected, and the test piece is easy to generate large deformation in the collision process to cause deformation of the support assembly and influence the recycling of the support assembly.
Furthermore, the left bracket body and the right bracket body both comprise two steel plates, a plurality of square steels and at least two pieces of angle steel, wherein the square steels are transversely welded on one steel plate; welding a plurality of square steels in pairs; one end of the angle steel is arranged to be inclined and welded on the other steel plate, and the other end of the angle steel is welded on one side of the square steel; and the steel plate is provided with a mounting hole for fixing the steel plate on a rigid wall. Through the cooperation of steel sheet, square steel and angle steel, the rigidity and the intensity of the support assembly who constitutes are great, can form powerful support and connection to the test piece, and difficult emergence is out of shape in the collision process, can used repeatedly.
Furthermore, the collision structure comprises a traction trolley and a collision part arranged at the front end of the traction trolley, so that the traction trolley and the collision part are respectively an independent part and can be mounted or dismounted according to requirements, and the universality of the traction trolley and the collision part is enhanced.
Further, the collision part comprises square steel, angle steel and a rigid cylinder; one end of the square steel is welded on the rigid cylinder, and the side edge of the other end of the square steel is welded with the angle steel; the angle steel is provided with a mounting hole. The rigid cylinder is used as a key part of the collision part, the longitudinal front end of the rigid cylinder is used for facing the test piece, and the rear end of the rigid cylinder is welded with square steel for supporting and stabilizing; the angle steel provided with the mounting hole is welded on the side edge of the other end of the square steel, and is used for mounting the collision part at the front end of the traction trolley and ensuring that the collision part is in the middle of the front end of the traction trolley.
Furthermore, the number of the square steels is a plurality, one ends of the square steels are concave arcs matched with the rigid cylinders, and the square steels are bilaterally symmetrical and welded on the rigid cylinders at equal intervals, so that the other ends of the square steels are combined to form a rectangular plane; one side of the angle steel is attached to the outer side of the square steel, the other side of the angle steel is flush with the rectangular plane, and the number of the angle steel is four. The arrangement of the concave arc is beneficial to enhancing the overall consistency and firmness of the collision part, and the rectangular plane enables the end part of the collision part to be smooth and easy to install with a traction trolley; four angle irons correspond to four sides of the rectangular plane respectively to enhance firmness of the collision part.
Furthermore, the traction trolley is used as a general device for a collision laboratory and comprises a trolley body and a rectangular mounting plate fixedly connected to the front end of the trolley body, bolt holes are formed in the rectangular mounting plate, and the angle steel is connected to the rectangular mounting plate through the mounting holes and the bolt holes. The rectangular mounting plate with the bolt holes is arranged at the front end of the trolley body, so that the collision part is mounted on the traction trolley, the structure is simple, and the operation is convenient.
And the test piece further comprises a steel plate which is welded on the test piece and is respectively matched with the left support connecting part and the right support connecting part, and a mounting hole is formed in the steel plate matched with the right support connecting part. The steel plates are selected according to different test pieces, so that the material selection is convenient, the flexibility is high, and the cost is low.
A test method of a test device for the dynamic bending resistance of a side column key part of an automobile comprises the following steps: 1. the left support body and the right support body are fixed on the rigid wall through mounting holes by bolts, the lower surfaces of the left support body and the right support body are 285 +/-30 mm away from the ground and are bilaterally symmetrical, and a preset distance is reserved between the left support body and the right support body; 2. mounting a test piece, clamping one end of the test piece with the welded steel plate in the rectangular groove, and fixing the other end of the test piece on the connecting part of the right bracket through a mounting hole by using a bolt; 3. arranging a collision structure, and fixing the collision part on the traction trolley through angle steel by using a bolt; aligning the center of the collision part to the middle part of the test piece; 4. the tractor is pulled by the traction device at a preset speed, so that the collision part at the front end of the tractor impacts the middle part of the test piece, and measurement and recording are performed.
The test method is widely applicable to key parts on automobiles, such as an inner doorsill, a rear door anti-collision beam, a front and rear protective cross beam, a B column body and the like; and may further be used to modify the assembly of standard components such as a rocker assembly, a rocker and seat beam assembly, a B-pillar assembly, and the like. By quickly optimizing the components and assemblies thereof, structural design goals can be better and faster achieved.
According to the device for testing the dynamic bending resistance of the automobile side post key part, the support assembly and the collision structure are made of common standard parts, so that the cost is extremely low, the structure is simple and easy to build, the installation and the disassembly are convenient, the universality is wide, the device can be repeatedly used, and multiple tests can be carried out; the dynamic impact test is carried out on the test piece fixed on the bracket assembly through the collision structure, the bending deformation of the test piece under high-speed impact can be simulated, and the deformation speed of the test piece is consistent with that of the whole vehicle collision test, so that the test piece can be optimally designed more accurately and efficiently; moreover, the part test realized by the test device has the advantages that the whole vehicle collision test does not have: firstly, the boundary constraint conditions of the parts are simple, the deformation is not influenced by other parts, the interference factors are few, and the deformation mode is simple and stable; secondly, the part test has low cost and high efficiency, can carry out multiple tests in a short period, and can fully test the parts; and thirdly, the deformation process and the deformation result of the part test are visual and easy to measure, and the part test can be aligned with the simulation to the maximum extent.
Drawings
Fig. 1 is an isometric view of a device for testing the dynamic bending resistance of a side pillar latch of an automobile according to the present invention.
FIG. 2 is a left side view of the apparatus for testing the dynamic bending resistance of the side post of the automobile latch of the present invention.
FIG. 3 is a plan view of the apparatus for testing dynamic bending resistance of a side pillar touch key of an automobile of the present invention.
FIG. 4 is an isometric view of a mount assembly of the present invention.
FIG. 5 is a front view of the bracket assembly of the present invention.
FIG. 6 is a top view of the bracket assembly of the present invention.
Fig. 7 is an isometric test chart of a test piece of the present invention.
FIG. 8 is a rear view of a test piece of the present invention.
Fig. 9 is a left side view of a test piece of the present invention.
Fig. 10 is a front view of the crash structure of the present invention.
Fig. 11 is a top view of the crash feature of the present invention.
The figures are numbered: 1. a bracket assembly; 2. a test piece; 3. a collision section; 4. and (5) dragging the trolley.
Detailed Description
The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, 2 and 3, the device for testing the dynamic bending resistance of the automobile side post impact key piece of the invention comprises a bracket assembly 1 which is arranged on a rigid wall and used for fixing a test piece 2 and a collision structure which is used for applying dynamic impact force to the test piece 2. The support assembly 1 comprises a left support and a right support, the left support consists of a left support body and a left support connecting part arranged at the front end of the left support body, and the right support consists of a right support body and a right support connecting part arranged at the front end of the right support body; the collision structure comprises a traction trolley 4 and a collision part 3 arranged at the front end of the traction trolley 4. The dynamic impact test is carried out on the test piece 2 fixed on the bracket assembly 1 through the collision structure, the bending deformation of the test piece 2 under high-speed impact can be simulated, and the deformation speed of the test piece 2 is consistent with that in the whole vehicle collision test, so that the test piece 2 can be optimized and designed more accurately and efficiently; and support assembly 1 and collision structure commonality are wide, simple structure, and is with low costs, easily builds, and the installation is dismantled conveniently, can reuse, many times test.
As shown in fig. 4, 5 and 6, the left bracket body and the right bracket body both comprise two steel plates, three square steels and two angle steels, wherein the three square steels are welded on one steel plate in sequence in the transverse direction; welding the square steel in pairs; one end of each angle steel is arranged to be inclined and welded on the other steel plate, and the other end of each angle steel is welded on one side of the square steel; and mounting holes for fixing the steel plates on the rigid wall are formed in the two steel plates. Through the cooperation of steel sheet, square steel and angle steel, the rigidity and the intensity of the support assembly 1 of constitution are great, can form powerful support and connection to test piece 2, are difficult for taking place the deformation in the collision process, can used repeatedly. Specifically, as shown in fig. 4, the left bracket connecting portion is a rectangular groove formed by welding two pieces of angle steel on the outer end surfaces of three pieces of square steel, and the right bracket connecting portion is a steel plate provided with a mounting hole. By the design, one end of the test piece 2 can be fixedly connected through the mounting hole, and the other end of the test piece 2 can freely slide in the rigid rectangular groove without being constrained, so that the test piece 2 integrally forms a structural form of a simply supported beam; if both ends are fixedly connected, one is equivalent to adding an energy absorbing piece, so that the test piece 2 cannot be independently examined, and the test piece 2 is easy to generate large deformation in the collision process to cause the deformation of the bracket assembly 1 and influence the recycling of the bracket assembly 1.
As shown in fig. 7, 8, and 9, the test piece in this embodiment is an outer panel of a left side sill of an automobile of a certain vehicle type, and has a cross section in a zigzag shape, and the difference between the upper and lower welded edges in the vertical direction of the surface is 8mm (the thickness is the depth difference between the upper and lower welded edges of an actual sample, and can be adjusted according to different samples). A rectangular steel plate matched with the rectangular groove is additionally welded on the left side of the outer plate of the threshold, and a rectangular steel plate with the thickness of 8mm is arranged on the inner side of the upper welding edge of the rectangular steel plate, so that the upper welding edge and the lower welding edge are prevented from forming a gap difference; a rectangular steel plate matched with the steel plate of the connecting part of the right bracket is additionally welded on the right side of the outer plate of the doorsill, and a rectangular plate with the thickness of 8mm is also laid on the inner side of the welding edge of the rectangular steel plate, so that the upper welding edge and the lower welding edge are prevented from forming a gap difference; the rectangular steel plate welded on the right side is provided with a mounting hole, so that the test piece 2 forms a structural form of a simply supported beam with one end fixedly connected and the other end free from being constrained to enable the test piece 2 to freely slide in the rigid rectangular groove.
As shown in fig. 10 and 11, the collision structure is composed of two parts: a traction trolley 4 and a collision part 3 arranged at the front end of the traction trolley 4; the collision part 3 comprises six square steels, four angle steels and a rigid cylinder; one end of the square steel is an inward concave arc in welding fit with the rigid cylinder, six pieces of square steel are bilaterally symmetrical and welded on the rigid cylinder at equal intervals, and the other ends of the six pieces of square steel are combined to form a rectangular plane; the four angle steels correspond to four sides of the rectangular plane respectively, one side of each angle steel is attached to the outer side of the square steel, and the other side of each angle steel is flush with the rectangular plane; and a plurality of equidistant mounting holes are formed in one side of each angle steel, which is parallel to the rectangular plane. The rigid cylinder is used as a key part of the collision part 3, the longitudinal front end of the rigid cylinder is used for facing the test piece 2, and the rear end of the rigid cylinder is welded with square steel for supporting and stabilizing; the angle steel provided with the mounting hole is used for mounting the collision part 3 at the front end of the traction trolley 4 and ensuring that the collision part 3 is positioned in the center of the front end of the traction trolley 4.
The traction trolley 4 comprises a trolley body and a rectangular mounting plate fixedly connected to the front end of the trolley body, bolt holes are formed in the rectangular mounting plate, and the angle steel is connected to the rectangular mounting plate through mounting holes and bolt holes through bolts, so that the collision part and the traction trolley are fixedly connected.
The testing method of the testing device for the dynamic bending resistance of the automobile side post touch key piece comprises the following steps: 1. the mounting bracket assembly 1 is mounted, a left bracket body and a right bracket body are fixed on a rigid wall through mounting holes by bolts, the lower surfaces of the left bracket body and the right bracket body are 285 mm plus or minus 30mm away from the ground and are bilaterally symmetrical, and a preset distance is reserved between the left bracket body and the right bracket body; 2. mounting a test piece 2, clamping one end of the test piece 2 with the welded steel plate in the rectangular groove, and fixing the other end of the test piece 2 on the connecting part of the right bracket through a mounting hole by using a bolt; 3. a collision structure is arranged, and the collision part 3 is fixed on the traction trolley 4 through angle steel by using a bolt; aligning the center of the collision part 3 to the middle part of the test piece 2; 4. the tractor 4 is pulled by a traction device at a preset speed, so that the collision part 3 at the front end of the tractor collides with the middle part of the test piece 2, and measurement and recording are carried out.
In addition, the test method adopting the device can be widely applied to key parts on the automobile, such as an inner doorsill, a rear door anti-collision beam, a front and rear protective cross beam, a B column body and the like, and can be further used for deformation of a standard part assembly, such as a doorsill assembly, a doorsill and seat cross beam assembly, a B column assembly and the like. By quickly optimizing the components and assemblies thereof, structural design goals can be better and faster achieved. During the test, testing arrangement is unchangeable, only adds when welding the steel sheet with left socle connecting portion and right branch frame connecting portion complex on the test piece, need carry out the flexibility and select materials and adjust.
The basic idea and the basic principle of the invention have been explained above by way of an introduction to the embodiments listed. The invention is in no way limited to the embodiments listed above. All equivalent changes, improvements, deliberate deteriorations and the like based on the technical scheme of the invention shall fall within the protection scope of the invention.
Claims (8)
1. A testing device for the dynamic bending resistance of a side column key piece of an automobile is characterized by comprising a bracket assembly and a collision structure, wherein the bracket assembly is arranged on a rigid wall and used for fixing a test piece, and the collision structure is used for applying dynamic impact force to the test piece; the support assembly comprises a left support and a right support, the left support consists of a left support body and a left support connecting part arranged at the front end of the left support body, and the right support consists of a right support body and a right support connecting part arranged at the front end of the right support body; the left support connecting part is a rectangular groove formed by combining two angle steels, the right support connecting part is a steel plate, and the steel plate is provided with a mounting hole.
2. The apparatus for testing the dynamic bending resistance of a side pillar touch key of an automobile according to claim 1, wherein the left bracket body and the right bracket body each comprise two steel plates, a plurality of square steels and at least two angle steels, wherein one steel plate is welded with the square steels in a transverse direction; welding a plurality of square steels in pairs; one end of the angle steel is arranged to be inclined and welded on the other steel plate, and the other end of the angle steel is welded on one side of the square steel; and the steel plate is provided with a mounting hole for fixing the steel plate on a rigid wall.
3. The apparatus for testing the dynamic bending resistance of a side pillar touch key of an automobile according to claim 1, wherein the collision structure comprises a towing vehicle and a collision part provided at a front end of the towing vehicle.
4. The apparatus for testing the dynamic bending resistance of a side pillar touch key of an automobile according to claim 3, wherein the collision part comprises square steel, angle steel and a rigid cylinder; one end of the square steel is welded on the rigid cylinder, and the side edge of the other end of the square steel is welded with the angle steel; the angle steel is provided with a mounting hole.
5. The device for testing the dynamic bending resistance of a side pillar key of an automobile as claimed in claim 4, wherein the number of the square steels is a plurality of pieces, one end of each of the plurality of pieces of square steels is an inward concave arc matched with the rigid cylinder, and the plurality of pieces of square steels are bilaterally symmetrical and welded to the rigid cylinder at equal intervals so that the other ends of the plurality of pieces of square steels are combined to form a rectangular plane; one side of the angle steel is attached to the outer side of the square steel, the other side of the angle steel is flush with the rectangular plane, and the number of the angle steel is four.
6. The device for testing the dynamic bending resistance of a side pillar key according to claim 5, wherein the towing trolley comprises a trolley body and a rectangular mounting plate fixedly connected to the front end of the trolley body, the rectangular mounting plate is provided with bolt holes, and the angle iron is connected to the rectangular mounting plate through the mounting holes and the bolt holes.
7. The apparatus for testing the dynamic bending resistance of a side pillar key of an automobile as claimed in claim 1, further comprising a steel plate welded to the test piece for fitting with the left and right bracket connection portions, respectively, wherein the steel plate fitting with the right bracket connection portion is provided with a mounting hole.
8. A test method using the test device for the dynamic bending resistance of the automobile side post touch key member as claimed in claims 1 to 7, is characterized by comprising the following steps: 1. the left support body and the right support body are fixed on the rigid wall through mounting holes by bolts, the lower surfaces of the left support body and the right support body are 285 +/-30 mm away from the ground and are bilaterally symmetrical, and a preset distance is reserved between the left support body and the right support body; 2. mounting a test piece, clamping one end of the test piece with the welded steel plate in the rectangular groove, and fixing the other end of the test piece on the connecting part of the right bracket through a mounting hole by using a bolt; 3. arranging a collision structure, and fixing the collision part on the traction trolley through angle steel by using a bolt; aligning the center of the collision part to the middle part of the test piece; 4. the tractor is pulled by the traction device at a preset speed, so that the collision part at the front end of the tractor impacts the middle part of the test piece, and measurement and recording are performed.
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| CN201710771738.1A CN107505142B (en) | 2017-08-31 | 2017-08-31 | Device and method for testing dynamic bending resistance of automobile side column touch key piece |
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| CN201710771738.1A CN107505142B (en) | 2017-08-31 | 2017-08-31 | Device and method for testing dynamic bending resistance of automobile side column touch key piece |
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| CN107505142B true CN107505142B (en) | 2020-03-24 |
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| CN109458974B (en) * | 2018-12-05 | 2024-05-31 | 江苏敏安电动汽车有限公司 | Device and method for measuring maximum deformation of side column collision power battery and power battery |
| CN111562116A (en) * | 2020-06-03 | 2020-08-21 | 爱驰汽车有限公司 | B-pillar collision test method |
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| KR100325211B1 (en) * | 1999-12-10 | 2002-03-04 | 이계안 | Roller device for side pole impact test of vehicles |
| CN201637583U (en) * | 2010-02-02 | 2010-11-17 | 中国汽车技术研究中心 | Static pressure test bed on top of vehicle door |
| CN104764615B (en) * | 2015-04-21 | 2017-08-04 | 奇瑞汽车股份有限公司 | A kind of vehicle side collision experimental rig and method |
| CN206450424U (en) * | 2017-01-24 | 2017-08-29 | 中国汽车技术研究中心 | Guide column structure of moving platform car for car side cylinder collision test |
| CN106813928A (en) * | 2017-03-31 | 2017-06-09 | 马鞍山钢铁股份有限公司 | B posts collision test device and the method that impact test is carried out using described device |
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