CN109489965B - Fatigue resistance testing machine for automotive vehicle interior trim parts - Google Patents
Fatigue resistance testing machine for automotive vehicle interior trim parts Download PDFInfo
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- CN109489965B CN109489965B CN201811631923.1A CN201811631923A CN109489965B CN 109489965 B CN109489965 B CN 109489965B CN 201811631923 A CN201811631923 A CN 201811631923A CN 109489965 B CN109489965 B CN 109489965B
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- 238000012360 testing method Methods 0.000 title claims abstract description 166
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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
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Abstract
The invention relates to a fatigue resistance tester for automotive vehicle interior trim parts, wherein: the bottom plate has T-shaped groove slide rail, and the stand that has T-shaped groove slide rail in bottom plate one end both sides set up. A movable cross beam of a T-shaped groove sliding rail is arranged between the upper parts of the two upright posts, and the middle of the cross beam is connected with a test operation head; the lower parts of the two upright posts are connected with the bottom plate. The surface of the bottom plate is provided with a plurality of T-shaped groove sliding rails and a detachable test object clamp, and the position of the test object clamp along the X-axis direction can be adjusted and fixed at the required position of the bottom plate. The test operation head is provided with a vertical push-pull servo linear electric cylinder, and the head end of a lifting rod of the test operation head is connected with one end of the sensor through a conversion shaft. The control system controls the test operation head to perform fatigue test on the tested object fixed on the bottom plate by the tested object clamp. The invention can perform strong force test for repeated disassembly, assembly, repeated opening and closing and the like of the connecting piece or the assembly piece of the vehicle interior decoration product, and realizes the mechanized operation of the fatigue test of the vehicle interior decoration.
Description
Technical Field
The invention relates to a mechanical measuring device of an automotive vehicle interior trim part, in particular to a fatigue resistance testing machine for testing the fatigue condition of the automotive vehicle interior trim part.
Background
Automotive vehicles such as passenger car interior products, including roofs, trunk hatracks, trunk spare tire covers, and the like, mostly require the installation of parts such as plastic parts, metal parts, and the like. The installation mode comprises mechanical assembly, welding, riveting, sewing, gluing and the like. These assemblies or connectors are often functional and are often subject to external forces, requiring a secure installation and a long service life. Therefore, various car manufacturing enterprises in the world have higher requirements on the installation fastness or service life of the connecting piece or the assembly piece of the interior product, and particularly under the relatively harsh conditions of high-temperature high-humidity simulation or low-temperature simulation, certain strength can be still maintained through repeated round trip tests, so that corresponding standards and test methods are formulated.
The existing similar technical products comprise an electronic strength tester, a rigidity tester and a multifunctional strength tester for sticking buckle connectors, and the existing similar technical products cannot meet the test requirements due to certain common problems and defects, and are specifically described below.
1. Electronic strong machine
At present, an electronic strength machine is commonly used for testing mechanical properties such as stretching, compression, bending, shearing, tearing, stripping and the like of various materials in strong tests of sedan interior products at home and abroad. The defects are as follows:
(1) The fatigue test to and fro cannot be performed, and only one-way experiments can be performed;
(2) The tested sample is required to be punched or cut into specified sizes for testing, so that the integrity of the car interior product is destroyed, and the requirement of an experimental standard cannot be met;
(3) The test can only be carried out at normal temperature and can not be carried out in a climatic box;
(4) The test of the car interior product under the simulated loading condition cannot be realized.
2. Rigidity testing machine
At present, third party laboratories (such as easy horses) at home and abroad have a rigidity testing machine for testing the rigidity of automotive interior products, the rigidity testing machine is large in size, and general experimental requirements are that an automotive interior to be tested is installed on an automotive body by transporting the automotive body to a designated position in front of the rigidity testing machine, and the actual loading condition is simulated to perform the rigidity test. The defects are that:
(1) The fatigue test to and fro cannot be performed, and only one-way experiments can be performed;
(2) Although the loading test can be simulated, the test machine cannot be tested in a climatic box due to the large size of the test machine;
(3) The price of the tester is higher, reaching more than 100 ten thousand yuan.
3. Multifunctional strength tester of sticking buckle connector (patent number: ZL 201210583623.7)
The multifunctional strength tester for the sticking buckle connecting piece can test the strength such as peeling, shearing, pulling-off and the like between the sticking buckle connecting piece used for the automotive interior trim and between two assembly pieces used for the automotive interior trim, and also belongs to a testing machine for fatigue tests. The defects are as follows:
(1) The adopted vertical pull-out servo linear cylinder can only be tested in a normal temperature environment and cannot be tested in a climatic box, and the reason is that: the consistency of the air pressure under the high and low temperature conditions is difficult to ensure, and the test numerical error is larger.
(2) The tested sample is required to be punched or cut into specified sizes for testing, so that the integrity of the car interior product is destroyed, and the requirement of an experimental standard cannot be met;
(3) The test of the car interior product under the simulated loading condition cannot be realized.
The fatigue test of the car interior product belongs to non-standard test, and is carried out according to the requirements of each host computer factory, so that standard test instruments and tools are not needed. For fatigue resistance test, the current method is still at a simple manual operation level, especially under high-temperature, high-humidity and low-temperature conditions, the experimental environment condition is bad, the physical and mental health of an experimental operator is seriously affected, and the consistency of each experiment is poor. Most of the tested samples can be tested only by cutting the tested samples into small blocks, and the integrity of the car interior decoration products is destroyed, so that the requirements of experimental standards are not met.
Fatigue test of car interior products of all host factories requires that the tested samples are subjected to fatigue test for the times specified by experimental standards under three conditions of high temperature, high humidity, normal temperature and low temperature, and whether the tested samples have abnormal sounds, abrasion, breakage, assembly gaps and other visual and auditory changes or not is evaluated after the test and the experiment. Because the fatigue resistance test only adopts manual turnover, a main machine factory does not prescribe the disassembly force or the opening force of the tested sample in the whole test process, and one mechanized test item of the car interior product in the production process is omitted, which is not beneficial to improving the product quality.
In view of this, those skilled in the art have made efforts to develop a fatigue resistance testing device for automotive interior trim parts to achieve a mechanized operation of fatigue testing of passenger car interior trim products, and require relatively low costs, and the test must be accurate.
Disclosure of Invention
The invention aims to provide a fatigue-resistant testing machine for automotive vehicle interior trim parts, which can be used for carrying out fatigue testing on repeated disassembly and assembly of vehicle interior trim product connecting pieces or assembly pieces, and can also be used for testing mechanical properties such as stripping, pulling-out, shearing, torque and the like of the vehicle interior trim product connecting pieces or assembly pieces, so that the mechanical operation on the fatigue testing of the vehicle interior trim parts is realized, the cost is relatively low, and the testing accuracy is high.
The technical scheme of the invention is as follows:
a fatigue resistance testing machine for automotive vehicle interior trim parts comprises a bottom plate, upright posts, a cross beam, a connecting plate, a testing operation head, an electric cylinder, a testing object clamp and a control system;
the bottom plate is a fixed bottom plate with T-shaped groove sliding rails, upright posts are arranged on two sides of one end part of the fixed bottom plate, and the T-shaped groove sliding rails are arranged on the inner sides of the upright posts; a T-shaped groove sliding rail movable cross beam is arranged between the upper parts of the two upright posts, two ends of the T-shaped groove sliding rail movable cross beam are connected with the upright posts through a round adjusting plate and a second connecting plate, and the middle of the T-shaped groove sliding rail movable cross beam is connected with a test operation head through a first connecting plate; the lower parts of the two upright posts are respectively connected with the fixed bottom plate through a third connecting plate and a semicircular adjusting plate;
the surface of the fixed bottom plate is provided with a plurality of T-shaped groove sliding rails and more than one row of detachable test object clamps, each row is provided with a plurality of test object clamps, and the test object clamps realize position adjustment along the X-axis direction and are fixed at the required position of the fixed bottom plate through inner hexagon bolts and T-shaped sliding nuts of the fixed bottom plate in the T-shaped groove sliding rails of the fixed bottom plate;
the test operation head is provided with a vertical push-pull servo linear electric cylinder, a conversion shaft and a sensor, the head end of a lifting rod of the test operation head is connected with one end of the sensor through the conversion shaft, and the other end of the sensor is connected with the test operation head into a whole through a first screw and a nut;
the control system comprises a controller and a control program, and the test operation head performs fatigue test on the tested object fixed on the fixed bottom plate by the tested object clamp under the control of the control system.
The first connecting plate is provided with an inner hexagon bolt and a T-shaped sliding nut of the first connecting plate, the T-shaped sliding nut on the first connecting plate slides in a T-shaped groove sliding rail of the T-shaped groove sliding rail movable cross beam, and meanwhile, the test operation head is driven to slide back and forth along the T-shaped groove sliding rail movable cross beam.
The circular adjusting plate is provided with an inner hexagon bolt of the circular adjusting plate, the inner hexagon bolt of the circular adjusting plate rotates in an arc-shaped groove of the circular adjusting plate, and meanwhile, the movable cross beam of the T-shaped groove sliding rail and the test operation head fixed with the movable cross beam of the T-shaped groove sliding rail are driven to rotate together.
The second connecting plate is provided with an inner hexagon bolt and a T-shaped sliding nut of the second connecting plate, the inner side of the second connecting plate is connected with the circular adjusting plate, the outer side of the second connecting plate is connected with the upright post, the T-shaped sliding nut of the second connecting plate slides in a T-shaped groove sliding rail of the upright post, and meanwhile, the movable cross beam of the T-shaped groove sliding rail is driven to slide up and down along the upright post.
The third connecting plate is provided with a countersunk bolt and a T-shaped sliding nut so as to be fixed with the upright post and connected with the semicircular adjusting plate.
The inner hexagon bolts of the semicircular adjusting plate are arranged on the semicircular adjusting plate, and rotate in the arc-shaped grooves of the semicircular adjusting plate and drive the upright posts connected with the semicircular adjusting plate to rotate together.
The semicircular adjusting plate is provided with an inner hexagon bolt and a T-shaped nut, and the inner hexagon bolt and the T-shaped nut are used for adjusting the bottom of the inner hexagon bolt to move back and forth.
The bottom of the fixed bottom plate is provided with four fixed bottom plate supporting feet.
The invention relates to a fatigue resistance tester for automotive vehicle interior trim parts, which is a mechanical testing instrument for testing the fatigue resistance between connecting pieces of vehicle interior trim products, is also a powerful machine for testing the fatigue resistance between various connecting pieces for a sedan, and particularly aims at carrying out powerful tests on repeated disassembly, assembly, repeated opening and closing and the like of the connecting pieces or the assembling pieces of the sedan interior trim products. The mechanical properties such as stripping, pulling-off, shearing, torque and the like between the connecting pieces or the assembling pieces of the car interior decoration products can be tested by matching with different operation test heads.
The fatigue resistance testing machine for the automotive vehicle interior trim part has the following advantages:
1. can be tested under three conditions of high temperature and humidity, normal temperature and low temperature.
2. The test device can be used for performing a reciprocating fatigue test, and can record X/Y axis coordinate test graphs of force/time, deformation/time, displacement/time, stress/time, strain/time, force/deformation, force/displacement, stress/strain and the like in real time, track the change trend of each dismounting force or opening and closing force of a tested sample in the rectifying test process, and facilitate the analysis and evaluation of the service life of a product.
3. Compared with manual operation, the consistency of each experiment is good: i.e. the force and speed applied to the sample to be measured is constant.
4. The sample to be tested does not need to be cut into small samples, the integrity of the sample to be tested is maintained, and the requirement of experimental standard is met.
5. Can adjust at two angles and three directions, it is nimble changeable, can satisfy the simulation loading test of different postures.
6. The self-research and development is carried out, and the manufacturing cost of the testing machine is low, and only 2-3 ten thousand yuan is needed.
Drawings
FIG. 1 is a schematic view of a fatigue resistance tester for automotive vehicle interior parts according to the present invention.
Fig. 2 is a schematic view of the tester of fig. 1 in a flat state.
Fig. 3 is a schematic view of the tester of fig. 1 in a standing state.
Fig. 4 is a schematic diagram of a test operation head structure of the tester.
Fig. 5 is a schematic structural view of a tester column.
Fig. 6 is a schematic structural view of a tester base plate.
FIG. 7 is a schematic diagram of a test machine for fatigue resistance testing of a car trunk spare tire cover plastic handle spring.
FIG. 8 is a schematic diagram of a test machine for fatigue resistance of a car trunk spare tire cover plastic handle.
Fig. 9 is a schematic diagram of a test machine for multiple disassembly and assembly durability tests of a hat rack of a car trunk.
Reference numerals:
1 is a vertical push-pull servo linear electric cylinder, 2 is a first connecting plate, 3 is a conversion shaft, 4 is a sensor, 5 is a first screw and a nut, 6 is an inner hexagon bolt and a T-shaped sliding nut of the first connecting plate, 7 is a stand column, 8 is a movable cross beam of a T-shaped groove sliding rail, 9 is a circular adjusting plate, 10 is a second connecting plate, 11 is a third connecting plate, 12 is an inner hexagon bolt and a T-shaped sliding nut of the second connecting plate, 13 is an inner hexagon bolt of the circular adjusting plate, the test device comprises a countersunk head bolt and a T-shaped sliding nut of a third connecting plate, wherein the countersunk head bolt and the T-shaped sliding nut of the third connecting plate are respectively arranged at 14, a fixed bottom plate with a T-shaped groove sliding rail is arranged at 15, a semicircular adjusting plate is arranged at 16, a detachable test object clamp is arranged at 17, a supporting leg of the fixed bottom plate is arranged at 18, an inner hexagon bolt and the T-shaped sliding nut of the fixed bottom plate are respectively arranged at 19, an inner hexagon bolt and a T-shaped nut of the semicircular adjusting plate are respectively arranged at 20, an inner hexagon bolt and a T-shaped nut of the adjusting bottom part move forwards and backwards are respectively arranged at 21, and a test object is arranged at 22.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
Referring to fig. 1 to 6, the invention provides a fatigue resistance tester for automotive vehicle interior parts, which mainly comprises a bottom plate, a column, a beam, a connecting plate, a test operation head, an electric cylinder, a test object clamp and a control system.
The bottom plate is fixed bottom plate 15 with T-shaped groove slide rail, and fixed bottom plate 15 one end both sides set up stand 7, and stand 7 inboard sets up T-shaped groove slide rail. The two ends of the movable cross beam of the T-shaped groove sliding rail 8,T type groove sliding rail 8 are connected with the upright posts 7 through the round adjusting plate 9 and the second connecting plate 10, and the middle of the movable cross beam of the T-shaped groove sliding rail 8 is connected with the testing operation head through the first connecting plate 2. The lower parts of the two upright posts 7 are respectively connected with a fixed bottom plate 15 through a third connecting plate 11 and a semicircular adjusting plate 16.
The surface of the fixed bottom plate 15 is provided with a plurality of T-shaped groove sliding rails and more than one row of detachable test object clamps 17, each row is provided with a plurality of test object clamps 17, and the test object clamps 17 are detachable movable test object fixing clamps of two types. The test object clamp 17 is adjusted in position along the X-axis direction by the hexagon socket head cap bolts and the T-shaped sliding nuts 19 of the fixed bottom plate in the T-shaped groove sliding rail of the fixed bottom plate 15 and is fixed at the required position of the fixed bottom plate 15.
The test operation head is provided with a vertical push-pull servo linear electric cylinder 1, a conversion shaft 3 and a sensor 4, the head end of a lifting rod of the test operation head is connected with one end of the sensor 4 through the conversion shaft 3, and the other end of the sensor 4 is connected with the test operation head into a whole through a first screw and a nut 5.
As shown in fig. 1, the first connecting plate 2 is provided with an inner hexagon bolt and a T-shaped sliding nut 6 of the first connecting plate, and the T-shaped sliding nut on the first connecting plate 2 slides in a T-shaped groove sliding rail of the T-shaped groove sliding rail movable cross beam 8, and drives the test operation head to slide back and forth along the T-shaped groove sliding rail movable cross beam 8.
The inner hexagon bolts 13 of the round adjusting plate are arranged on the round adjusting plate 9, the inner hexagon bolts 13 of the round adjusting plate rotate in the arc-shaped grooves of the round adjusting plate 9, and meanwhile the T-shaped groove sliding rail movable cross beam 8 and the test operation head fixed with the T-shaped groove sliding rail movable cross beam 8 are driven to rotate together.
The second connecting plate 10 is provided with an inner hexagon bolt and a T-shaped sliding nut 12 of the second connecting plate, the inner side of the second connecting plate 10 is connected with the circular adjusting plate 9, the outer side of the second connecting plate 10 is connected with the upright post 7, the T-shaped sliding nut of the second connecting plate 10 slides in a T-shaped groove sliding rail of the upright post 7, and meanwhile, the movable cross beam 8 of the T-shaped groove sliding rail is driven to slide up and down along the upright post 7.
The third connection plate 11 is equipped with countersunk bolts and T-shaped slip nuts 14 to be fixed with the uprights 7 and connected with the semicircular adjustment plate 16.
The semicircular adjusting plate 16 is provided with an inner hexagon bolt 20 of the semicircular adjusting plate, and the inner hexagon bolt 20 of the semicircular adjusting plate rotates in an arc-shaped groove of the semicircular adjusting plate 16 and drives the upright post 7 connected with the semicircular adjusting plate 16 to rotate together. The semicircular adjusting plate 16 is also provided with an inner hexagonal bolt and a T-nut 21, the bottom of which can be adjusted to move back and forth.
Four fixed bottom plate supporting feet 18 are arranged at the bottom of the fixed bottom plate 15.
The control system of the fatigue-resistant testing machine for automotive vehicle interior parts of the present invention comprises a controller and a control program, and under the control of the control system, the test operation head performs a fatigue test on the test object 22 fixed on the fixed base plate 15 by the test object fixture 17.
As shown in fig. 1, 4, 5 and 6, the fatigue resistance tester for automotive vehicle interior parts of the present invention may be composed of a control test part (see fig. 4), an adjustment test object test orientation part (fig. 5), and a fixed test object part (fig. 6) in actual manufacturing.
The linear lifting cylinder of the control test part adopts a vertical push-pull servo linear electric cylinder 1, the connecting part of the linear lifting cylinder comprises a first connecting plate 2, a conversion shaft 3, a sensor 4, a first screw and a nut 5, and the first connecting plate 2 is provided with four inner hexagon bolts and four T-shaped sliding nuts 6.
The vertical push-pull servo linear electric cylinder 1 is fixed on a movable cross beam 8 of a T-shaped groove slide rail through a first connecting plate 2, the head end of a lifting rod of a vertical push-pull servo actuator is connected with one end of a sensor 4 through a conversion shaft 3, and the other end of the sensor 4 is connected with a test operation head into a whole through a first screw and a nut 5.
The rated output force of the vertical push-pull servo linear electric cylinder 1 of the control test part is 1KN, and the effective stroke is 300mm. The effective value of the sensor 4 matched with the vertical push-pull servo linear electric cylinder 1 is 0-1 KN, the T-shaped sliding nut 6 on the first connecting plate 2 connected with the vertical push-pull servo linear electric cylinder 1 can slide in the T-shaped groove sliding rail in the movable cross beam 8, and meanwhile, the control test part is driven to slide back and forth along the movable cross beam 8, and the effective stroke is 0-800 mm.
The component for adjusting the test object testing azimuth takes an I-shaped component formed by two upright posts 7 with T-shaped groove sliding rails and a movable cross beam 8 with T-shaped groove sliding rails as a main body, and the connecting component consists of two circular adjusting plates 9, two second connecting plates 10 and two third connecting plates 11. The second connecting plate 10 is provided with four socket head cap screws and four T-shaped slip nuts 12. The circular adjusting plate 9 is provided with four socket head cap screws 13. The third connection plate 11 is provided with four countersunk bolts and four T-shaped slip nuts 14.
Two ends of the movable cross beam 8 are respectively and vertically fixed on the two upright posts 7 through a round adjusting plate 9 and a second connecting plate 10, and the bottom ends of the two upright posts 7 are respectively connected with the fixed bottom plate 15 into a whole through a third connecting plate 11 and a semicircular adjusting plate 16.
The movable cross beam 8 and the upright post 7 for adjusting the azimuth component for testing the test object are both made of 6060 European standard industrial aluminum profiles, the length of the movable cross beam 8 is 900mm, the length of the upright post 7 is 1500mm, the inner hexagon bolts 13 in the two circular adjusting plates 9 respectively connected with the two ends of the movable cross beam 8 can rotate in the arc grooves of the circular adjusting plates 9, and meanwhile, the movable cross beam 8 and the control test component fixed with the movable cross beam 8 into a whole are driven to rotate together, and the adjustable range of the rotation angle is 0-120 degrees. T-shaped sliding nuts 12 on second connecting plates 10 respectively connected with two ends of the movable cross beam 8 through angle adjusting plates can slide in T-shaped groove sliding rails of the two upright posts 7 at the same time, and meanwhile the movable cross beam 8 is driven to slide up and down along the upright posts 7, and the effective stroke is 0-1200 mm. The bottoms of the two upright posts 7 are respectively connected to a semicircular adjusting plate 16 through a third connecting plate 11, and the angle adjustable range between the bottoms and the X axis is 0-180 degrees.
The fixed test object part takes a fixed bottom plate 15 with a T-shaped groove sliding rail as a main body, the connecting part comprises two semicircular adjusting plates 16, a detachable test object clamp 17, four fixed bottom plate supporting feet 18, a plurality of inner hexagon bolts and T-shaped sliding nuts 19 with the same number, the two semicircular adjusting plates 16 are respectively provided with three inner hexagon bolts 20, and four inner hexagon bolts and four T-shaped nuts 21 which move forwards and backwards at the bottom of the adjusting plates.
The two sides of the face of the fixed bottom plate 15 parallel to the X axis are respectively connected with the upright posts 7 into a whole through a semicircular adjusting plate 16 and a third connecting plate 11, and the positions of the two upright posts 7 along the X axis direction are adjusted at the same time and the two upright posts 7 are fixed at the required positions of the fixed bottom plate 15. The test object clamp 17 is a detachable movable test object fixing clamp, and the test object clamp 17 on the face of the fixing bottom plate 15 is adjusted in position along the X axis direction through a T-shaped sliding nut 19 in a T-shaped groove sliding rail of the fixing bottom plate 15 and is fixed at a required position of the fixing bottom plate 15. Four fixed bottom plate supporting feet 18 are arranged at the bottom of the fixed bottom plate 15.
The fixing base 15 for fixing the test object parts is made of 30150 European standard industrial aluminum profile with dimensions of 1000mm×900mm×30mm. The hexagon socket head cap screws 20 in the two semicircular adjusting plates 16 respectively connected with the fixed bottom plate 15 can rotate in the arc grooves of the semicircular adjusting plates 16, and simultaneously drive the two upright posts 7 connected with the semicircular adjusting plates 16 to rotate together, and the adjustable range of the rotation angle is 0-180 degrees. The angle adjustment range of the two upright posts 7 connected with the fixed bottom plate 15 and the X axis is 0-180 degrees, and the effective travel of the two upright posts along the X axis direction is 0-860 mm. The bottoms of the two upright posts 7 are respectively connected to a semicircular adjusting plate 16 through a third connecting plate 11, and the angle adjustable range is 0-180 degrees. The test object fixtures 17 are arranged on the fixed bottom plate 15, and the number of the test object fixtures is 2-16. Four T-shaped sliding nuts 19 are arranged in each T-shaped groove sliding rail of the fixed bottom plate 15.
The fatigue resistance testing machine for the automotive vehicle interior trim part makes the following tests according to the testing requirements:
referring to fig. 7, a fatigue resistance test of a plastic handle spring of a spare tire cover plate of a car trunk.
Experimental conditions: 1000 times under normal temperature.
Experiment requirements: during and after the experiment, visual and audible changes such as abnormal sound, abrasion, fracture, assembly gaps and the like are not allowed to occur.
The tested trunk spare tire cover plate assembly A is folded at the hinge for 180 ℃, then is horizontally placed on the fixed bottom plate 15, the folded tested trunk spare tire cover plate assembly A is fixed on the fixed bottom plate 15 by the test object clamp 17, and the sensor 4 is installed on the test operation head by the first screw and the nut 5. The test operation head is driven to move forward through the vertical push-pull servo linear electric cylinder 1 to push against the movable plastic part on the handle of the spare tire cover plate assembly A of the tested trunk, when the pushing pressure reaches 40N, the pushing is stopped, after 1s, the test operation head is driven to retract through the vertical push-pull servo linear electric cylinder 1, and after the set position is reached, the test operation head stops. After the above actions are repeated 1000 times, after the experiment is neutralized, whether the measured sample has abnormal sound, abrasion, fracture, assembly gap and other visual and auditory changes are evaluated. The recorded stress-time curve graph can be used for a customer to track the change trend of the dismounting force or the opening and closing force of the tested sample each time in the rectifying and modifying test process so as to analyze and evaluate the service life of the product.
Referring to fig. 8, a plastic handle of a spare tire cover plate of a car trunk is subjected to an open-close fatigue test.
The fatigue resistance testing machine for the automotive vehicle interior trim part is transferred into a climate experiment box for testing.
Experimental conditions: the open-close fatigue resistance test is performed 1000 times in sequence from-20 ℃ (100 times), 60 ℃ (100 times), 38 ℃/95% relative (100 times), and 20 ℃ (700 times).
Experiment requirements: during and after the experiment, visual and audible changes such as abnormal sound, abrasion, fracture, assembly gaps and the like are not allowed to occur.
One side of the spare tire cover plate assembly A of the tested luggage case is fixed on the fixed bottom plate 15 by using the test object clamp 17, then one end of the test operation head is installed on the sensor 4 by the first screw and the nut 5, the other end of the test operation head is connected to the handle of the spare tire cover plate assembly A of the tested luggage case, and before the experiment starts, the spare tire cover plate assembly A of the tested luggage case is in a horizontal placement state on the fixed bottom plate 15.
The test operation head is driven by the vertical push-pull servo linear electric cylinder 1, the handle of the spare tire cover plate assembly A of the tested trunk is pulled together, the handle is contracted and moved, and the handle is pulled away by a certain angle under the action of the gravity of the spare tire cover plate assembly A. And stopping after reaching a preset position, wherein the lifted surface of the spare tire cover plate assembly A of the tested trunk forms an included angle of 45 degrees with the fixed bottom plate 15. Then, the vertical push-pull servo linear electric cylinder 1 is driven again to move forwards until the spare tire cover plate assembly A is restored to be flat, namely, the pulling force becomes zero, and the movement is stopped. The above movement is repeated a prescribed number of times. And after the experiment, evaluating whether the measured sample has abnormal sound, abrasion, fracture, assembly gap and other visual and audible changes. The recorded stress-displacement curve graph can be used for a customer to track the change trend of each dismounting force or opening and closing force of the tested sample in the rectifying and modifying test process so as to analyze and evaluate the service life of the product.
Referring to fig. 9, the hat rack of the car trunk was subjected to a plurality of disassembly and assembly durability tests.
The fatigue resistance testing machine for the automotive vehicle interior trim part is transferred into a climate experiment box, the whole sedan body is also in the climate experiment box, and two sides of the tested trunk hat rack B are installed and fixed in the sedan trunk through plastic parts for testing.
Experimental conditions: (1) 600 times of disassembly and assembly under the normal temperature state; (2) 200 times of disassembly and assembly at the temperature of +80 ℃; (3) -30 ℃ and 200 times of disassembly and assembly. And total 1000 times of disassembly and assembly durability tests.
Experiment requirements: during and after the experiment, visual and audible changes such as abnormal sound, abrasion, fracture, assembly gaps and the like are not allowed to occur.
One end of the test operation head is installed on the sensor 4 through the first screw and the nut 5, the other end of the test operation head is used for being fixedly connected with the tested trunk hat rack B, the test operation head is driven by the vertical push-pull servo linear electric cylinder 1, the tested trunk hat rack B is pulled together, the test operation head contracts, the tested trunk hat rack B is detached from a car body, after reaching a preset position, the test operation head stops moving, then the vertical push-pull servo linear electric cylinder 1 is driven again to move forwards, and the tested trunk hat rack B is reinstalled on the car body, namely, after reaching the preset position, the test operation head stops moving. The above movement is repeated a prescribed number of times. And after the experiment, evaluating whether the measured sample has abnormal sound, abrasion, fracture, assembly gap and other visual and audible changes. The recorded stress-displacement curve graph can be used for a customer to track the change trend of each dismounting force or opening and closing force of the tested sample in the rectifying and modifying test process so as to analyze and evaluate the service life of the product.
In summary, the fatigue resistance testing machine for automotive vehicle interior trim parts can perform strong tests on repeated disassembly, assembly, repeated opening and closing and the like of the connecting pieces or the assembly parts of the automotive vehicle interior trim parts, and can also test the mechanical properties such as stripping, pulling-off, shearing, torque and the like of the connecting pieces or the assembly parts of the automotive vehicle interior trim parts by matching with different operation testing heads.
The fatigue resistance testing machine for the automotive vehicle interior trim part can test under three conditions of high temperature and high humidity, normal temperature and low temperature; the fatigue test can be performed back and forth; compared with manual operation, the consistency of each experiment is good, and the force and the speed applied to the tested sample are constant; the sample to be tested does not need to be cut into small samples, the integrity of the sample to be tested is reserved, and the requirement of experimental standard is met; the device can be adjusted in two angles and three directions, is flexible and changeable, and can meet the simulation loading tests of different postures; the testing machine is self-developed and low in cost.
Of course, those skilled in the art will recognize that the above-described embodiments are for illustrative purposes only and are not meant to be limiting, as variations, modifications, etc. of the above-described embodiments will fall within the scope of the appended claims, as long as they are within the true spirit of the invention.
Claims (8)
1. A fatigue resistance testing machine for automotive vehicle interior spare, characterized in that: the test device comprises a bottom plate, upright posts, a cross beam, a connecting plate, a test operation head, an electric cylinder, a test object clamp and a control system;
the bottom plate is a fixed bottom plate (15) with T-shaped groove sliding rails, two sides of one end part of the fixed bottom plate (15) are provided with upright posts (7), and the inner sides of the upright posts (7) are provided with T-shaped groove sliding rails; a T-shaped groove sliding rail movable cross beam (8) is arranged between the upper parts of the two upright posts (7), two ends of the T-shaped groove sliding rail movable cross beam (8) are connected with the upright posts (7) through a round adjusting plate (9) and a second connecting plate (10), and the middle of the T-shaped groove sliding rail movable cross beam (8) is connected with a test operation head through a first connecting plate (2); the lower parts of the two upright posts (7) are respectively connected with a fixed bottom plate (15) through a third connecting plate (11) and a semicircular adjusting plate (16);
the surface of the fixed bottom plate (15) is provided with a plurality of T-shaped groove sliding rails and more than one row of detachable test object clamps (17), each row is provided with a plurality of test object clamps (17), and the test object clamps (17) realize position adjustment along the X-axis direction through inner hexagon bolts of the fixed bottom plate in the T-shaped groove sliding rails of the fixed bottom plate (15) and first T-shaped sliding nuts (19) and are fixed at the required positions of the fixed bottom plate (15);
the test operation head is provided with a vertical push-pull servo linear electric cylinder (1), a conversion shaft (3) and a sensor (4), the head end of a lifting rod of the test operation head is connected with one end of the sensor (4) through the conversion shaft (3), and the other end of the sensor (4) is connected with the test operation head into a whole through a first screw and a nut (5);
the control system comprises a controller and a control program, and the test operation head performs fatigue test on a tested object (22) fixed on the fixed bottom plate (15) by the tested object clamp (17) under the control of the control system.
2. The fatigue resistance tester for automotive vehicle interior parts according to claim 1, wherein: the first connecting plate (2) is provided with an inner hexagon bolt of the first connecting plate and a second T-shaped sliding nut (6), the T-shaped sliding nut on the first connecting plate (2) slides in a T-shaped groove sliding rail of the T-shaped groove sliding rail movable cross beam (8), and meanwhile, the test operation head is driven to slide back and forth along the T-shaped groove sliding rail movable cross beam (8).
3. The fatigue resistance tester for automotive vehicle interior parts according to claim 1, wherein: the circular adjusting plate (9) is provided with an inner hexagon bolt (13) of the circular adjusting plate, the inner hexagon bolt (13) of the circular adjusting plate rotates in an arc-shaped groove of the circular adjusting plate (9), and meanwhile the T-shaped groove sliding rail movable cross beam (8) and the test operation head fixed with the T-shaped groove sliding rail movable cross beam (8) are driven to rotate together.
4. The fatigue resistance tester for automotive vehicle interior parts according to claim 1, wherein: the second connecting plate (10) is provided with an inner hexagon bolt of the second connecting plate and a third T-shaped sliding nut (12), the inner side of the second connecting plate (10) is connected with the circular adjusting plate (9), the outer side of the second connecting plate (10) is connected with the upright post (7), the T-shaped sliding nut of the second connecting plate (10) slides in a T-shaped groove sliding rail of the upright post (7), and meanwhile, the T-shaped groove sliding rail movable cross beam (8) is driven to slide up and down along the upright post (7).
5. The fatigue resistance tester for automotive vehicle interior parts according to claim 1, wherein: the third connecting plate (11) is provided with a countersunk bolt and a fourth T-shaped sliding nut (14) so as to be fixed with the upright post (7) and connected with the semicircular adjusting plate (16).
6. The fatigue resistance tester for automotive vehicle interior parts according to claim 1, wherein: the semicircular adjusting plate (16) is provided with an inner hexagon bolt (20) of the semicircular adjusting plate, the inner hexagon bolt (20) of the semicircular adjusting plate rotates in an arc-shaped groove of the semicircular adjusting plate (16) and drives an upright post (7) connected with the semicircular adjusting plate (16) to rotate together.
7. The fatigue resistance tester for automotive vehicle interior parts according to claim 1, wherein: the semicircular adjusting plate (16) is provided with an inner hexagon bolt and a T-shaped nut (21) for adjusting the bottom to move forwards and backwards.
8. The fatigue resistance tester for automotive vehicle interior parts according to claim 1, wherein: four fixed bottom plate supporting feet (18) are arranged at the bottom of the fixed bottom plate (15).
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| CN201811631923.1A CN109489965B (en) | 2018-12-29 | 2018-12-29 | Fatigue resistance testing machine for automotive vehicle interior trim parts |
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