CN116735123A - Method for testing surface rigidity of automobile body outer covering part - Google Patents
Method for testing surface rigidity of automobile body outer covering part Download PDFInfo
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- CN116735123A CN116735123A CN202310423891.0A CN202310423891A CN116735123A CN 116735123 A CN116735123 A CN 116735123A CN 202310423891 A CN202310423891 A CN 202310423891A CN 116735123 A CN116735123 A CN 116735123A
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
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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
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0075—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by means of external apparatus, e.g. test benches or portable test systems
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Abstract
The invention relates to a surface rigidity test method of an automobile body outer covering part, which comprises the steps of fixing a displacement sensor on an external fixed support, using a loading head, stably and uniformly applying 400N load along the normal direction of a selected test point on the automobile body outer covering part, and then uniformly unloading; measuring the corresponding deformation in the loading process along the loading direction; collecting test data, drawing a force-deformation curve, and recording residual deformation after unloading; and calculates the unstable region of the point according to the curve. Unstable region calculation: selecting a first unstable point A and a second unstable point B from the force-deformation curve, and calculating A, B the distance between the two points on the X axis, namely the unstable area of the point; the deformation of the measured point is checked by using a light transmission method. The method is simple and convenient, the operation is easy, the spherical loading head can simulate most of contact working conditions encountered by the automobile outer covering part, the universality of the test is ensured, and the accuracy of test data is ensured; and (5) the front and rear outer covering parts are measured by clamping the automobile body at one time.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a method for testing the surface rigidity of an automobile body outer covering part.
Background
With the development of the automobile industry, subjective evaluation of automobiles by consumers is an important evaluation point of purchase, wherein the consumers want to subjectively evaluate the firmness of the automobiles, and the primary contact is the automobile body outer panel. The automobile body outer covering piece is characterized in that the supporting pieces are few, different deformation can be generated along with the size of the load when the supporting pieces are subjected to external load, and when a consumer touches, presses and supports the automobile body outer covering piece, the consumer sees that the larger deformation can subjectively consider that the rigidity is insufficient. The test method for the surface rigidity of the outer covering part of the automobile body is an important test method for detecting the firmness of the outer covering part of the automobile body, and can simulate the change of the outer covering part of the automobile under the external load.
The most common test method in the prior art is that after a loading pressure plate is installed by a force measuring device, pressure is applied to the surface of the outer covering piece of the automobile body, and then the deformation of the surface of the outer covering piece of the automobile body is obtained through the measured displacement. Because the loading pressure plate is a plane, after the loading pressure plate contacts with the outer covering piece and applies load, the pressure plate is in line contact with the surface of the loading pressure plate due to the deformation of the outer covering piece, and the pressure plate is different from the actual working condition, so that the inaccuracy of a test result is caused; and the universal loading pressure heads are not available, so that the test data of various vehicle types cannot be marked. During measurement, the shape of the outer covering piece of the automobile body is changeable, the curvature is different, the measuring device is required to be reinstalled at each point, and the measurement cannot be performed because some parts cannot provide supporting positions. After the load-deformation curve is obtained after the test, only the maximum deformation and the residual deformation are recorded, and a uniform calculation method is not adopted for the instability interval; there is no unified determination method for pits caused by permanent deformation on the vehicle body outer panel.
Disclosure of Invention
The invention aims to provide a surface rigidity test method for an automobile body outer covering part, which aims to solve the problems that the existing test method is inaccurate in result, test data of various automobile types cannot be marked, the shape of the automobile body outer covering part is changeable, the curvature is different, the surface of a tested piece cannot be completely attached during measurement, and the measurement of the front and rear outer covering parts cannot be completed by clamping the automobile body once.
The invention aims at realizing the following technical scheme:
a method for testing the surface rigidity of an automobile body outer covering part comprises the following steps:
a, fixing a displacement sensor on an external fixed support, keeping the measuring direction of the displacement sensor consistent with the loading direction, then using a loading head 1, stably and uniformly applying 400N load along the normal direction of a selected test point on an outer covering piece of a vehicle body, and then uniformly unloading;
B. measuring the corresponding deformation in the loading process along the loading direction;
C. collecting test data, drawing a force-deformation curve, and recording residual deformation after unloading; and calculates the unstable region of the point according to the curve.
D. Unstable region calculation: selecting a first unstable point A and a second unstable point B from the force-deformation curve, and calculating A, B the distance between the two points on the X axis, namely the unstable area of the point;
E. checking the concave deformation of the measured point by using a light transmission method:
e1, clinging to a car body at one side of the test point, and illuminating by using an incandescent lamp;
e2, the test personnel stands up the steel plate ruler on the other side of the test point, and the ruler is closely attached to the surface of the test point vehicle body and slowly rotates and moves;
e3, the tester clings to the car body for backlight inspection, and lamplight is transmitted from the space between the ruler and the surface of the car body to indicate that the surface near the point has concave deformation; the light-tight is not deformed by the depression.
Further, in the step a, the loading head 1 has a curvature, the main body 11 is made of aluminum alloy, the spherical diameter of the spherical part is 25mm, the diameter of the cylindrical part is 80mm, and the surface of the loading head 1 is covered with a layer of hard rubber 12 with the diameter of 2-3 mm.
Furthermore, the loading head 1 is provided with a threaded hole with the diameter of 10mm on the non-loading surface, and can be connected to a force sensor of the loading mechanism 2, the loading mechanism 2 consists of an angle adjusting device 22, an X-axis motion system 23, a Z-axis motion system 24, a hydraulic system 25, a pressure loading system 26 and a Y-axis motion system 27, and the pressure loading system 26 is moved to a required position and fixed through a X, Y, Z three-direction motion system, so that the rigidity test can be performed.
Furthermore, the angle adjusting device 22 is connected to the head end of the square tube through a flange and an expansion sleeve, and is internally provided with a hydraulic device, when the hydraulic pressure is more than or equal to 3MPa, the angle adjusting device can be manually and freely adjusted, so that the loading head can freely rotate around the X, Y, Z shaft; when the pressure is less than 3MPa, the angle adjusting device is locked.
Furthermore, the X-axis movement system 23 consists of a supporting plate, a motor, a guide rail sliding block, a gear rack, a reduction gearbox of a worm gear and a bottom plate, and is driven by the gear rack during movement and is reduced by the reduction gearbox of the worm gear and the worm; the bottom plate is arranged on the iron platform 21, and is provided with two guide rails and a rack; the support plate is provided with a reduction gearbox and a sliding block, the motor is arranged on the reduction gearbox, an input shaft of the reduction gearbox is connected with an output shaft of the motor, a gear is arranged on the output shaft of the reduction gearbox, and the guide rail is matched with the sliding block to be used as a support through motor driving and gear rack meshing transmission.
Still further, the Z-axis moving system 24 is composed of a Z-axis bracket, a worm gear lifter, a motor, a sleeve and a guide rail slider, the Z-axis bracket is fixed on a pallet of the X-axis moving system 23, two guide rails are installed on a stand column of the bracket, the worm gear lifter is installed and fixed on the top end of the Z-axis, the support and the transmission are performed through a screw-nut pair, the motor is installed on the lifter, the nut and the Z-axis slider are installed on the sleeve, the support and the Z-axis direction movement are performed through the screw-nut pair, and the guide is performed through the guide rail slider.
Furthermore, the hydraulic system 25 is installed at the tail end of the square tube, and uses 45# hydraulic oil to provide a variable pressure value for the angle adjusting device, so as to control the adjustment and locking of the angle adjusting device.
Further, the pressure loading system 26 uses an electric cylinder to provide pressure for the loading head 1 to ensure the completion of the test, the tail end of the pressure loading system is connected to the angle adjusting device 22 through a flange, the head end is provided with a sensor for testing the pressure, the other end of the pressure loading system is provided with the loading head 1, and the loading head 1 applies pressure to the vehicle body.
Further, the Y-axis motion system 27 is composed of a sleeve, a screw nut pair, a square tube, a guide rail slide block, a motor and a loading system, and an adjustable plum blossom coupling is adopted between the Y-axis motor and the screw for transmission; the Y-axis angle adjusting device adopts hydraulic control, can control oil pressure to perform angle adjustment and locking, is stepless in adjustment, and has no dead angle; a sliding block is fixed on the sleeve in the Y-axis direction; a nut is fixed on the sleeve in the Y-axis direction; the square tube is provided with a guide rail and a screw rod which are respectively matched with a sliding block and a nut on the sleeve to form a guide rail sliding block and a screw rod nut pair, wherein the screw rod is connected with a motor fixed at one end of the square tube through a coupler and is driven by the motor.
Further, in step D, the unstable point a is a point with a slope of zero, and the second unstable point B is a point that tends to be stable after the slope changes from zero to a positive value.
Compared with the prior art, the invention has the beneficial effects that:
the method for testing the surface rigidity of the automobile body outer covering part is simple and convenient and is easy to operate; the spherical loading head is mainly designed, so that most of contact working conditions of an automobile outer covering part can be simulated, the universality of a test is ensured, and the accuracy of test data is ensured;
the loading mode that the loading head can rotate within a 360-degree range and the XYZ three directions can move within a large range is designed, and the problem that the shape of the outer covering piece of the automobile body is changeable, the curvature is different, and the surface of a tested piece cannot be completely attached during measurement is solved; the surface rigidity measuring points are wide in range, the equipment cannot be considered in a limited position, all measuring points cannot be reached, and the problem that the outer covering parts can not be measured before and after the automobile body is clamped once can not be solved;
the method can intuitively judge the surface rigidity instability of the tested piece, determine the size of the instability zone and provide a direct basis for the quality improvement of products;
a light transmission method inspection method is designed for inspecting the dent resistance of the surface of the automobile body outer covering piece, and the method is simple to operate and can be used for subjective evaluation, so that time and labor are saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a loader head;
FIG. 2 is a general diagram of a loading mechanism;
FIG. 3 is a block diagram of the shaft motion system of FIG. X;
FIG. 4 is a block diagram of a Z axis motion system;
FIG. 5 is a block diagram of a Y axis motion system;
FIG. 6 is a schematic diagram of an unstable region.
In the figure, 11, the main body of the loading head 12, the hard rubber 21, the test bed iron floor 22, the angle adjusting device 23, the X-axis movement system 24, the Z-axis movement system 25, the hydraulic system 26, the pressure loading system 27 and the Y-axis movement system.
Detailed Description
The invention is further illustrated by the following examples:
the invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.
The method for testing the surface rigidity of the automobile body outer covering part comprises a surface dent resistance test and a surface rigidity instability test. The surface concavity resistance is tested, and the characteristic that the surface of a test point on the outer surface of a tested piece is not sunken after the test point is subjected to the action process of external forward pressure with a certain value is tested; and (3) testing the fluctuation and change characteristics of the deformation curve of the test point on the outer surface of the tested piece in the process of being subjected to external forward pressure with a certain value by the surface rigidity instability test.
The method for testing the surface rigidity of the automobile body outer covering part is simple and convenient and is easy to operate. The spherical loading head is mainly designed, so that most of contact working conditions of an automobile outer covering part can be simulated, the universality of a test is ensured, and the accuracy of test data is ensured; the loading mode that the loading head can rotate within a 360-degree range and the XYZ three directions can move within a large range is designed, and the problem that the shape of the outer covering piece of the automobile body is changeable, the curvature is different, and the surface of a tested piece cannot be completely attached during measurement is solved; the surface rigidity measuring points are wide in range, the equipment cannot be considered in a limited position, all measuring points cannot be reached, and the problem that the outer covering parts can not be measured before and after the automobile body is clamped once can not be solved; the method can intuitively judge the surface rigidity instability of the tested piece, determine the size of the instability zone and provide a direct basis for the quality improvement of products; a light transmission method inspection method is designed for inspecting the dent resistance of the surface of the automobile body outer covering piece, and the method is simple to operate and can be used for subjective evaluation, so that time and labor are saved.
Specifically, the method for testing the surface rigidity of the automobile body outer covering part comprises the following steps:
1. mounting sample
Fixing the tested piece on the test bed iron floor 21, and ensuring the freedom degree 123456 of the tested piece to be fully restrained;
2. site selection
The test point selection method comprises the following steps:
1. selecting loading measuring points according to CAE analysis results;
2. the subjective feeling of a manual finger pressure method is adopted, a tested piece is pressed by fingers, and a point with weaker rigidity on the tested piece is determined to be a loading measuring point;
3. when selecting test points, the oil filling port, the outline marker lamp, the reinforcing ribs, the edge and corner protrusions and the concave parts are required to be avoided.
3. Loading device selection
In order to ensure better simulation of the conditions of pressing, object extrusion, test piece and the like, a loading head 1 with curvature is adopted, as shown in fig. 1, a main body 11 of the loading head is made of aluminum alloy, the spherical diameter of a spherical part is 25mm, the diameter of a cylindrical part is 80mm, and the surface of the loading head needs to be covered with a layer of hard rubber 12 with the diameter of 2-3 mm, so that the conditions of lower hardness of an object or a body part which is applied with load under the conditions of simulation of pressing and the like can be simulated, and the surface of a vehicle body can be protected from being damaged. The hard rubber 12 is adhered to the spherical surface of the loading end of the loading head and is attached to the whole loading surface, and the hardness of the rubber 12 is as follows: the Shore A hardness was 50.
The loading head 1 is provided with a threaded hole with the diameter of 10mm on the non-loading surface, and can be directly or through a bolt connected to a force sensor of the loading mechanism 2, and the loading mechanism 2 consists of an angle adjusting device 22, an X-axis motion system 23, a Z-axis motion system 24, a hydraulic system 25, a pressure loading system 26 and a Y-axis motion system 27, as shown in figure 2. The stiffness test can be performed by moving the pressure loading system 26 to its desired position and securing it by a X, Y, Z three-way motion system.
The angle adjusting device 22 is connected to the head end of the square tube through a flange and an expansion sleeve, and a hydraulic device is arranged in the angle adjusting device, so that the angle adjusting device can be manually and freely adjusted when the hydraulic pressure is more than or equal to 3MPa, and the loading head can freely rotate around a X, Y, Z shaft; when the pressure is less than 3MPa, the angle adjusting device is locked;
the hydraulic system 25 is arranged at the tail end of the square pipe, uses 45# hydraulic oil, and mainly provides a variable pressure value for the angle adjusting device so as to control the adjustment and locking of the angle adjusting device;
the pressure loading system 26 is characterized in that an electric cylinder provides pressure for the loading head 1 to ensure the completion of a test, the tail end of the pressure loading system is connected to the angle adjusting device 22 through a flange, a sensor is arranged at the head end of the pressure loading system for testing the pressure, the loading head 1 is arranged at the other end of the pressure loading system, and the loading head 1 applies pressure to a vehicle body.
The X-axis motion system 23 consists of a supporting plate, a motor, a guide rail sliding block, a gear rack, a reduction gearbox of a worm gear and a bottom plate, as shown in fig. 3. During movement, the gear and rack is adopted for transmission, and the speed is reduced through a worm gear and worm zero-clearance gearbox, so that the positioning accuracy is ensured, and the control error is within a reasonable range.
The bottom plate is arranged on the iron platform 21, and two guide rails and one rack are arranged on the bottom plate;
the supporting plate is provided with a reduction gearbox and a sliding block, the motor is arranged on the reduction gearbox, and an input shaft of the reduction gearbox is connected with an output shaft of the motor. The gear is arranged on the output shaft of the reduction gearbox, and is driven by a motor, and the gear and the rack are meshed for transmission. The guide rail is matched with the sliding block to be used as a support;
the Z-axis motion system 24 consists of a Z-axis bracket, a worm and gear lifter, a motor, a sleeve, a guide rail slide block and other parts. The Z-axis angle replacing device can enable the loading system to be misplaced with the main shaft of the Y-axis 27 by 300mm to 500mm, and loading of the loading head 1 at a position with smaller space is facilitated.
The Z-axis bracket is fixed on the supporting plate of the X-axis movement system 23, can realize movement in the X direction, and two guide rails are arranged on the stand column of the bracket to play a role in guiding. The top end of the Z shaft is provided with a fixed worm gear lifter, the worm gear lifter is supported and driven through a screw nut pair, and a motor is arranged on the lifter to play a driving role.
The sleeve is provided with a nut and a Z-axis sliding block, supports and moves in the Z-axis direction through a screw nut pair, and guides through a guide rail sliding block.
The sleeve movement speed can be determined according to the adjustment motor rotation speed.
The Y-axis motion system 27 is composed of a sleeve, a screw nut pair, a square tube, a guide rail slider, a motor and a loading system, as shown in fig. 5. An adjustable plum blossom shaft coupling is adopted for transmission between the Y-axis motor and the screw rod; the Y-axis angle adjusting device adopts hydraulic control, can control oil pressure to carry out angle adjustment and locking, is stepless in adjustment, and has no dead angle.
A sliding block is fixed on the sleeve in the Y-axis direction, so that the sliding block plays a role in supporting and guiding the movement of the square pipe; a nut is fixed on the sleeve in the Y-axis direction, and the motion of the square tube is driven;
the square tube is provided with a guide rail and a screw rod which are respectively matched with a sliding block and a nut on the sleeve to form a guide rail sliding block and a screw rod nut pair, wherein the screw rod is connected with a motor fixed at one end of the square tube through a coupler and is driven by the motor.
4. Test procedure
1. Fixing a displacement sensor on an external fixed support, keeping the measuring direction of the displacement sensor consistent with the loading direction, using a standard loading head, stably and uniformly applying 400N load along the normal direction of a selected test point on the outer covering piece of the automobile body, and uniformly unloading;
2. measuring the corresponding deformation in the loading process along the loading direction;
3. collecting test data, drawing a force-deformation curve, and recording residual deformation after unloading; and calculates the unstable region of the point according to the curve as shown in fig. 6.
4. Unstable region calculation: selecting a first unstable point A (a point with zero slope) and a second unstable point B (a point which tends to be stable after the slope changes from zero to a positive value) on the force-deformation curve, and calculating the distance between the two points A, B on the X axis, namely an unstable area of the point, as shown in fig. 5;
5. checking the concave deformation of the measured point: inspection was performed by a light transmission method.
51. One side of the test point is tightly attached to the car body and is illuminated by an incandescent lamp;
52. the test personnel stands up the steel plate ruler on the other side of the test point, and the ruler is clung to the surface of the test point vehicle body and slowly rotates and moves;
53. the tester clings to the car body for backlight inspection, and lamplight is transmitted from the space between the ruler and the car body surface to indicate that the surface near the point has concave deformation; the light-tight is not deformed by the depression.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. The method for testing the surface rigidity of the automobile body outer covering part is characterized by comprising the following steps of:
a, fixing a displacement sensor on an external fixed support, keeping the measuring direction of the displacement sensor consistent with the loading direction, then using a loading head (1), stably and uniformly applying 400N load along the normal direction of a selected test point on an outer covering piece of a vehicle body, and then uniformly unloading;
B. measuring the corresponding deformation in the loading process along the loading direction;
C. collecting test data, drawing a force-deformation curve, and recording residual deformation after unloading; and calculates the unstable region of the point according to the curve.
D. Unstable region calculation: selecting a first unstable point A and a second unstable point B from the force-deformation curve, and calculating A, B the distance between the two points on the X axis, namely the unstable area of the point;
E. checking the concave deformation of the measured point by using a light transmission method:
e1, clinging to a car body at one side of the test point, and illuminating by using an incandescent lamp;
e2, the test personnel stands up the steel plate ruler on the other side of the test point, and the ruler is closely attached to the surface of the test point vehicle body and slowly rotates and moves;
e3, the tester clings to the car body for backlight inspection, and lamplight is transmitted from the space between the ruler and the surface of the car body to indicate that the surface near the point has concave deformation; the light-tight is not deformed by the depression.
2. A method of testing the surface stiffness of an automotive body outer panel according to claim 1, wherein: and A, the loading head (1) has curvature, the main body (11) of the loading head is made of aluminum alloy, the spherical diameter of the spherical part is 25mm, the diameter of the cylindrical part is 80mm, and the surface of the loading head 1 is covered with a layer of hard rubber (12) with the thickness of 2-3 mm.
3. A method of testing the surface stiffness of an automotive body outer panel according to claim 2, wherein: the loading head (1) is provided with a threaded hole with the diameter of 10mm on the non-loading surface, the threaded hole can be connected to a force sensor of the loading mechanism (2), the loading mechanism (2) is composed of an angle adjusting device (22), an X-axis moving system (23), a Z-axis moving system (24), a hydraulic system (25), a pressure loading system (26) and a Y-axis moving system (27), and the pressure loading system (26) is moved to a required position and fixed through the X, Y, Z three-direction moving system, so that a rigidity test can be performed.
4. A method of testing the surface stiffness of an automotive body outer panel according to claim 3, wherein: the angle adjusting device (22) is connected to the head end of the square tube through a flange and an expansion sleeve, a hydraulic device is arranged in the angle adjusting device, and when the hydraulic pressure is more than or equal to 3MPa, the angle adjusting device can be manually and freely adjusted, so that the loading head can freely rotate around a X, Y, Z shaft; when the pressure is less than 3MPa, the angle adjusting device is locked.
5. A method of testing the surface stiffness of an automotive body outer panel according to claim 3, wherein: the X-axis movement system (23) consists of a supporting plate, a motor, a guide rail sliding block, a gear rack, a reduction gearbox of a worm gear and a bottom plate, and is driven by the gear rack during movement and is reduced by the reduction gearbox of the worm gear and the worm; the bottom plate is arranged on the iron platform (21), and is provided with two guide rails and a rack; the support plate is provided with a reduction gearbox and a sliding block, the motor is arranged on the reduction gearbox, an input shaft of the reduction gearbox is connected with an output shaft of the motor, a gear is arranged on the output shaft of the reduction gearbox, and the guide rail is matched with the sliding block to be used as a support through motor driving and gear rack meshing transmission.
6. A method of testing the surface stiffness of an automotive body outer panel according to claim 3, wherein: the Z-axis motion system (24) is composed of a Z-axis support, a worm gear lifter, a motor, a sleeve and a guide rail sliding block, wherein the Z-axis support is fixed on a supporting plate of the X-axis motion system (23), two guide rails are arranged on a support upright post, the worm gear lifter is fixedly arranged at the top end of the Z-axis, the support and the transmission are carried out through a screw-nut pair, the motor is arranged on the lifter, the nut and the Z-axis sliding block are arranged on the sleeve, the support and the Z-axis direction motion are carried out through the screw-nut pair, and the guide is carried out through the guide rail sliding block.
7. A method of testing the surface stiffness of an automotive body outer panel according to claim 3, wherein: the hydraulic system (25) is arranged at the tail end of the square pipe, 45# hydraulic oil is used for providing a variable pressure value for the angle adjusting device and is used for controlling the adjustment and locking of the angle adjusting device.
8. A method of testing the surface stiffness of an automotive body outer panel according to claim 3, wherein: the pressure loading system (26) is characterized in that an electric cylinder provides pressure for the loading head (1) to ensure the completion of a test, the tail end of the pressure loading system is connected to the angle adjusting device (22) through a flange, a sensor is arranged at the head end of the pressure loading system and used for testing the pressure, the loading head (1) is arranged at the other end of the pressure loading system, and the loading head (1) applies pressure to a vehicle body.
9. A method of testing the surface stiffness of an automotive body outer panel according to claim 3, wherein: the Y-axis motion system (27) consists of a sleeve, a screw nut pair, a square tube, a guide rail sliding block, a motor and a loading system, and an adjustable plum blossom coupling is adopted between the Y-axis motor and the screw for transmission; the Y-axis angle adjusting device adopts hydraulic control, can control oil pressure to perform angle adjustment and locking, is stepless in adjustment, and has no dead angle; a sliding block is fixed on the sleeve in the Y-axis direction; a nut is fixed on the sleeve in the Y-axis direction; the square tube is provided with a guide rail and a screw rod which are respectively matched with a sliding block and a nut on the sleeve to form a guide rail sliding block and a screw rod nut pair, wherein the screw rod is connected with a motor fixed at one end of the square tube through a coupler and is driven by the motor.
10. A method of testing the surface stiffness of an automotive body outer panel according to claim 1, wherein: and D, the unstable point A is a point with a slope of zero, and the second unstable point B is a point which is stabilized after the slope is changed from zero to a positive value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310423891.0A CN116735123A (en) | 2023-04-20 | 2023-04-20 | Method for testing surface rigidity of automobile body outer covering part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310423891.0A CN116735123A (en) | 2023-04-20 | 2023-04-20 | Method for testing surface rigidity of automobile body outer covering part |
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| Publication Number | Publication Date |
|---|---|
| CN116735123A true CN116735123A (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310423891.0A Pending CN116735123A (en) | 2023-04-20 | 2023-04-20 | Method for testing surface rigidity of automobile body outer covering part |
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| Country | Link |
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| CN (1) | CN116735123A (en) |
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2023
- 2023-04-20 CN CN202310423891.0A patent/CN116735123A/en active Pending
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