CN112414652A - Efficient high-precision white car body static rigidity measurement system and test method - Google Patents
Efficient high-precision white car body static rigidity measurement system and test method Download PDFInfo
- Publication number
- CN112414652A CN112414652A CN202011370160.7A CN202011370160A CN112414652A CN 112414652 A CN112414652 A CN 112414652A CN 202011370160 A CN202011370160 A CN 202011370160A CN 112414652 A CN112414652 A CN 112414652A
- Authority
- CN
- China
- Prior art keywords
- white
- supporting device
- rear suspension
- measuring
- front suspension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
Abstract
The invention relates to a high-efficiency high-precision white vehicle body static stiffness measuring system and a testing method, wherein the measuring system comprises a front suspension restraining and supporting device, a rear suspension restraining and supporting device, a pre-supporting device and a servo loading system, the XY position of the front suspension restraining and supporting device is adjustable, the height and the left and right positions of an upper front suspension supporting device are adjustable, a T-shaped table can rotate around a Z axis, the XY position of the rear suspension restraining and supporting device is adjustable, the height of the rear suspension restraining and supporting device is adjustable, the pre-supporting device is respectively erected below left and right threshold beams of a white vehicle body in a test, the height of the pre-supporting device is adjustable, and the servo loading system is used for carrying out bending loading or torsion loading. The invention can be convenient for centering the white body with the test bed after being hoisted and adjusting the white body posture to be horizontal to the ground, can effectively avoid the generation of internal stress in the installation process and enables the measurement result to be more accurate.
Description
Technical Field
The invention relates to the technical field of automobile body-in-white static rigidity measurement, in particular to a high-efficiency high-precision body-in-white static rigidity measurement system and a test method;
background
The white body static stiffness of the automobile is an important performance index of a passenger automobile body structure, and the quality of the white body static stiffness can influence the safety, stability, comfort, NVH (noise vibration harshness) and other performance indexes of the automobile, so that the design, simulation and test of the white body static stiffness have important significance. At present, the static rigidity value of a white automobile body obtained by calculation and simulation is more ideal. The actual white car body is influenced by manufacturing and processing technologies, and the integral static rigidity performance of the white car body has a certain difference with a simulation result, so that the static rigidity evaluation of the white car body structure still needs test data information of the actual white car body, and therefore, a passenger car body static rigidity test system is still necessary equipment for developing the passenger car body.
Chinese patent CN102455250A discloses a system and a method for testing bending stiffness of a body-in-white of an automobile, wherein the system for testing bending stiffness of the body-in-white of the automobile comprises a constraint subsystem and a loading subsystem, and particularly a front suspension rack and a rear suspension rack in the constraint subsystem can be adaptively adjusted in a testing process. The patent only considers the device and the method for restraining and loading, but the current test equipment is used, the central axis of the white body and the central axis of the test bed are not on the same plane due to white body hoisting operation, and the threshold beam of the white body is not horizontal to the ground after the white body is hoisted, so that the mounting internal stress of the white body cannot be eliminated, the load of bending loading and the body cannot keep a plumb, and the test result is not accurate enough.
Chinese patent CN203745209U discloses a bending static stiffness testing system for a white car body structure, wherein a front suspension restraint device and a rear suspension restraint device are disclosed for restraining and fixing a front suspension shock absorber and a rear suspension spring mounting support on a white car body and adjusting the supporting height of the white car body, and a torsional stiffness loading device, a bending stiffness loading device and a manual-automatic integrated loading mechanism are used for applying required torsional or bending load to the white car body. However, the patent does not mention the following: 1. the device measures and the method for eliminating the internal stress in the fixed mounting process of the white automobile body in the static rigidity test of the white automobile body. 2. The measurement error of the displacement detection equipment in the white vehicle body static rigidity test is reduced.
In summary, the following steps: firstly, the existing white vehicle body static rigidity testing system only considers the device and the method of restraint and loading, but the existing testing equipment is used, because the central axis of the white vehicle body and the central axis of the test bed are not on the same plane due to white vehicle body hoisting operation, and the sill beam of the vehicle body is not horizontal to the ground after the white vehicle body is hoisted, the installation internal stress can not be eliminated, the load of bending loading and the vehicle body can not keep a plumb bob, and the testing result is not accurate enough. Secondly, because displacement measurement device adopts amesdial or displacement sensor mostly in the test, displacement sensor quality is light, the installation of being convenient for, but because the output is voltage signal, receives signal interference at the laboratory scene more easily. Although the dial gauge is high in precision, the dial gauge is large in mass, and the stability of the existing support is poor. Thirdly, because the displacement measuring device requires the axis of the measuring telescopic rod to be kept horizontal with the lateral displacement direction, the actual installation process of the existing device is difficult to realize, the measured displacement value is not accurate enough due to the fact that the two points are all, and the rigidity value can not be calculated accurately. At present, a great amount of manpower and time are spent for centering and leveling a body-in-white and a test bed as far as possible and adjusting the axis of a telescopic rod of a measuring device to be vertical, and the adjusting result is not ideal.
For the three points, no mature technical scheme patent application exists, however, with the development of the automobile industry, more and more automobile types are put into research and development, so that a whole set of white automobile body static stiffness test system with high efficiency and accurate and reliable test data and a corresponding test operation method are urgently needed.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides an efficient high-precision white body static stiffness measuring system and a testing method.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-efficiency high-precision white vehicle body static stiffness measuring system comprises a constraint supporting system and a servo loading system, wherein the constraint supporting system comprises a front suspension constraint supporting device and a rear suspension constraint supporting device;
the front suspension constraint supporting device comprises a T-shaped platform, a front suspension sliding rail assembly, a front suspension supporting device and a base; the T-shaped table comprises a transverse arm and a vertical arm, the lower end of the vertical arm is hinged with the base through a Z-direction rotating shaft, and the upper end of the vertical arm is hinged with the transverse arm through an X-direction rotating shaft; the base is matched with the front suspension sliding rail assembly and can move in the X direction and the Y direction; the upper end of the cross arm is provided with a Y-direction slide rail; the front suspension supporting device comprises a lower half-section structure and an upper half-section structure which are detachably mounted, wherein the bottom end of the lower half-section structure is mounted on a Y-direction slide rail to realize Y-direction movement, and the top end of the upper half-section structure is connected with a fixed point of a white vehicle body front suspension;
the rear suspension restraining and supporting device comprises a rear suspension supporting device and a rear suspension sliding rail assembly, the rear suspension supporting device comprises a lower half-section structure and an upper half-section structure which are detachably mounted, the bottom end of the lower half-section structure is mounted on the rear suspension sliding rail assembly and can move in the X direction and the Y direction, and the lower half-section structure comprises a first telescopic stand column used for adjusting the height of the rear suspension supporting device;
the restraint support system also comprises a pre-support device, wherein the pre-support device is respectively erected below left and right threshold beams of a body-in-white in a test and comprises a second telescopic upright post for adjusting the height of the pre-support device;
the servo loading system is used for bending loading or torsion loading on the body-in-white.
In the above scheme, the measurement system further comprises a vehicle body posture horizontal detection device, the vehicle body posture horizontal detection device comprises four laser distance detection devices, and the four laser distance detection devices are arranged right below four vehicle body point positions by respectively taking two bilaterally symmetrical points in front of and behind the white vehicle body so as to correct the horizontal posture of the white vehicle body.
In the above scheme, the measuring system further comprises a displacement measuring device arranged below the measured point, the displacement measuring device comprises a dial indicator and a supporting device thereof, the dial indicator is mounted on the supporting device through a dial indicator clamp, and a liquid bubble type level gauge perpendicular to the axis of the measuring sliding rod of the dial indicator is arranged on the dial indicator clamp.
In the scheme, the measurement system further comprises a data acquisition and processing system, the data acquisition and processing system comprises an acquisition bus, corresponding data acquisition equipment and a computer, the dial indicator is connected with the data acquisition equipment through the acquisition bus, the data acquisition equipment is connected with the computer, the data acquisition equipment acquires digital signals and then transmits displacement data to the computer control unit, and the white body bending and torsional rigidity calculation system reads the displacement values and then outputs the bending and torsional rigidity values of the white body through a calculation processing program.
In the above scheme, the lower half section structure of the front suspension support device comprises a sliding block and a first lower flange plate, the bottom end of the sliding block is provided with a groove matched with the Y-direction sliding rail, and the top end of the sliding block is provided with the first lower flange plate; the first section structure of the front overhang supporting device comprises a first upper flange plate, a first stand column and a first spherical hinge, bolt holes matched with the first upper flange plate and the first lower flange plate are arranged on the first upper flange plate and the first lower flange plate, the first upper flange plate and the first lower flange plate are connected through bolts, the first stand column is arranged on the first upper flange plate, the first spherical hinge is arranged at the top end of the first stand column, and the first spherical hinge is used for being connected with a fixed point of a front overhang of a white automobile body.
In the above scheme, the front suspension slide rail assembly comprises a front suspension Y-direction slide rail mounted on the ground and a front suspension X-direction slide rail mounted on the front suspension Y-direction slide rail, and the base is mounted on the front suspension X-direction slide rail.
In the above scheme, the lower half structure of the rear suspension support device further comprises a first box body, a first motor and a second lower flange plate, a screw rod structure is arranged in the first box body, the first telescopic upright post is mounted at the output end of the screw rod structure, the screw rod structure is driven by the first motor to move so as to drive the first telescopic upright post to adjust the height, and the second lower flange plate is mounted at the upper end of the first telescopic upright post; the first half section structure of the rear overhang supporting device comprises a second upper flange, a second stand column and a second spherical hinge, bolt holes matched with the bolt holes are formed in the second upper flange and a second lower flange, the second upper flange and the second lower flange are connected through bolts, the second stand column is installed on the second upper flange, the second spherical hinge is installed at the top end of the second stand column, and the second spherical hinge is used for being connected with a fixed point of a rear overhang of a white automobile body.
In the above scheme, the rear suspension sliding rail assembly comprises a rear suspension X-direction sliding rail mounted on the ground and a rear suspension Y-direction sliding rail mounted on the rear suspension X-direction sliding rail, and the rear suspension supporting device is mounted on the rear suspension Y-direction sliding rail.
In the above scheme, strutting arrangement still includes second box, second motor and positioning mechanism in advance, be equipped with the lead screw structure in the second box, the flexible stand of second is installed in the output of lead screw structure, thereby drives the flexible stand height-adjusting of second through the motion of second motor drive lead screw structure, and positioning mechanism installs in the flexible stand top of second to with the installation of threshold roof beam panel beating turn-ups adaptation of white automobile body.
Correspondingly, the invention also provides a high-efficiency high-precision white vehicle body static rigidity measuring method, which is carried out by adopting the measuring system and comprises the following steps:
step S1, mounting the white body for the test, which comprises the following steps:
s1.1, respectively connecting the upper half-section structures of a front suspension supporting device and a rear suspension supporting device with front and rear suspension fixing points of a body-in-white in a ball hinge mode to enable the upper half-section support to keep natural sagging;
s1.2, measuring the sheet metal flanging distance of left and right threshold beams of a body in white and the distance between upper half-section structures of a front suspension supporting device, symmetrically arranging a pre-supporting device on a test bed in a left-right mode by taking the center line of a floor of the test bed as a symmetry axis, and controlling a second motor to lift a second telescopic upright post of the pre-supporting device to enable the bilaterally symmetrical pre-supporting device to be at the same height to form four supporting points;
s1.3, hanging the body-in-white over a test bed, placing the body-in-white on a pre-supporting device, enabling flanges of the body-in-white to be located in a positioning mechanism, and enabling a front suspension of the body-in-white to be basically located over a front suspension restraining and supporting device;
s1.4, adjusting X, Y direction positions of a front suspension restraint support device and a rear suspension restraint support device through a front suspension slide rail assembly and a rear suspension slide rail assembly respectively, and adjusting the Y-direction distance of a lower half structure of the front suspension support device through a Y-direction slide rail to align an upper half structure and a lower half structure of the front suspension support device and the rear suspension support device on the same Z-direction axis, so that the center line of a white automobile body and the center line of a test bed are in the same plane;
s1.5, descending a second telescopic upright post of the pre-supporting device to enable upper and lower half-section structures of the front and rear suspension supporting devices to be in contact with each other, fixedly connecting the upper and lower half-section structures together through a connecting piece, and then descending the second telescopic upright post of the pre-supporting device and evacuating the second telescopic upright post from a test area;
s1.6, selecting N pairs of bilaterally symmetrical detection points at the bottom of a body-in-white, arranging N independent laser distance detection devices on the ground, respectively aligning the detection points, and adjusting the height of a rear suspension support device by comparing the distances from the symmetrical detection points to the laser distance detection devices to ensure the body-in-white to be horizontal;
step S2, measuring point arrangement: measuring points are arranged at the front longitudinal beam, the threshold beam and the rear longitudinal beam of the white automobile body at equal intervals, and a displacement measuring device is arranged under each measuring point, so that a measuring head of a measuring slide rod of a dial indicator is in contact with each measuring point of the white automobile body;
step S3, bending rigidity test: the computer control unit controls the servo loading device to load the body-in-white, and the body-in-white is restrained and fixed on the test bed to enable the body-in-white to generate Z-direction bending deformation; a load numerical value is obtained through a tension pressure sensor of the servo loading device, and a bending load is transmitted to a computer control unit through a signal line so as to realize servo control on a loading mechanism; the bending deformation of the body-in-white is obtained through a dial indicator at a measuring point below the body-in-white, the bending deformation is transmitted to a computer control unit through a CAN line and data acquisition equipment, the computer control unit carries out data processing on the load and the deformation according to a set operation program, and the bending rigidity value and the corresponding bending line of the body-in-white are output;
step S4, torsional rigidity test: the servo loading device is controlled by the computer control unit to load the body-in-white, and the body-in-white is restrained and fixed on the test bed, so that the T-shaped table drives the body-in-white to generate torsional deformation; a load numerical value is obtained through a tension pressure sensor of the servo loading device, and a torsional load is transmitted to a computer control unit through a signal line so as to realize servo control on a loading mechanism; the torsional deformation of the body-in-white is obtained through a dial indicator at a measuring point below the body-in-white, the torsional deformation is transmitted to the computer control unit through a CAN line and a data acquisition device, the computer control unit processes the deformation according to a set operation program to obtain the torsional angle of the body-in-white, and then the torsional rigidity value of the tested body-in-white is calculated according to the torsional angle and the torsional load.
The invention has the beneficial effects that:
1. through the cooperation of the front suspension constraint supporting device, the rear suspension constraint supporting device and the pre-supporting device, the lifting connection between the body-in-white and the test system is quicker, the centering and leveling of the body-in-white and the test bed are more accurate and convenient, the internal stress generated in the installation process of the body-in-white is eliminated, and the measurement result is more accurate.
2. The measuring device of the system adopts the bus dial indicator, reduces the interference of electromagnetic interference on electric signals, can directly output stable displacement numerical signals, and enables the measuring result to be more accurate.
3. The measuring device of the system has stable support, and is convenient to adjust until the axis of the measuring slide bar is parallel to the detection displacement direction, so that the measuring accuracy is improved. Meanwhile, the arrangement of the measuring device is quicker, the test efficiency is improved on the whole, and the test preparation time is greatly shortened.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is an overall block diagram of the body-in-white static stiffness measurement system of the present invention;
FIG. 2 is a block diagram of a front suspension restraint support arrangement of the body-in-white static stiffness measurement system of FIG. 1;
FIG. 3 is a block diagram of a rear overhang restraint support arrangement of the body-in-white static stiffness measurement system of FIG. 1;
FIG. 4 is a block diagram of a pre-support arrangement of the body-in-white static stiffness measurement system of FIG. 1;
FIG. 5 is a block diagram of a servo loading unit of the body-in-white static stiffness measurement system of FIG. 1;
fig. 6 is a schematic view of the installation position of a body attitude level detecting device of the white static rigidity measuring system shown in fig. 1;
FIG. 7 is a block diagram of a displacement measuring device of the body-in-white static stiffness measurement system of FIG. 1;
FIG. 8 is a detailed structural view of the displacement measuring device shown in FIG. 1;
FIG. 9 is a schematic view of a body-in-white bending stiffness test using the present measurement system;
FIG. 10 is a schematic view of a body-in-white torsional stiffness test using the present measurement system;
FIG. 11 is a flow chart of the method for measuring the static rigidity of the body-in-white according to the invention.
10. A front overhang restraint support; 11. a T-shaped table; 111. a cross arm; 112. a vertical arm; 12. a front overhang slide rail assembly; 121. front suspension X-direction slide rails; 122. front suspension Y-direction slide rails; 13. a front overhang support; 131. a slider; 132. a first lower flange; 133. a first upper flange; 134. a first upright post; 135. a first spherical hinge; 14. a Y-direction slide rail; 15. a Z-direction rotating shaft; 16. an X-direction rotating shaft; 17. a base;
20. a rear overhang restraint support device; 21. a rear overhang support; 211. a first case; 212. a first motor; 213. a first telescopic column; 214. a second lower flange; 215. a second upper flange; 216. a second upright post; 217. a second spherical hinge; 22. a rear overhang slide rail assembly; 221. a rear suspension X-direction slide rail; 222. rear suspension Y-direction slide rails;
30. a pre-support device; 31. a second case; 32. a second motor; 33. a second telescopic upright post; 34. a positioning mechanism;
40. a servo loading device; 41. adding a carrier; 42. a servo motor; 43. a force sensor; 44. bending and loading the screw rod; 45. bending the loading beam; 46. twisting the loading screw rod;
50. a vehicle body attitude leveling device;
60. a displacement measuring device; 61. a magnetic base; 62. a first arm; 63. a second arm; 64. adjustable support ribs; 65. a dial gauge clamp; 66. a dial indicator; 661. measuring a slide bar; 662. a measuring head; 67. an adjustable ball head; 68. a bubble level; 69. a fastening device;
200. a measured body-in-white; 300. an iron floor.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the scheme described below, the longitudinal axis of the measured body-in-white 200 is the X direction, the left and right of the body-in-white is the Y direction, and the direction perpendicular to the iron floor of the test bed is the Z direction.
As shown in fig. 1, the high-efficiency high-precision white body static stiffness measurement system provided in the embodiment of the present invention includes a constraint support system, a servo loading system, a body attitude level detection device 50, a displacement measurement device 60, and a data acquisition and processing system. The constraint support system comprises a front suspension constraint support device 10, a rear suspension constraint support device 20 and a pre-support device 30. The servo loading system is used for carrying out bending loading or torsion loading on the body-in-white.
As shown in fig. 2, front overhang restraint support 10 includes a T-shaped table 11, a front overhang slide rail assembly 12, a front overhang support 13, and a base 17. The T-shaped table 11 comprises a cross arm 111 and a vertical arm 112, the lower end of the vertical arm 112 is hinged with the base 17 through a Z-direction rotating shaft 15, the upper end of the vertical arm 112 is hinged with the cross arm 111 through an X-direction rotating shaft 16, and the upper end of the cross arm 111 is provided with a Y-direction sliding rail 14. The front suspension slide rail assembly 12 includes a front suspension Y-direction slide rail 122 mounted on the test bed iron floor 300 and a front suspension X-direction slide rail 121 mounted on the front suspension Y-direction slide rail 122, and the base 17 is mounted on the front suspension X-direction slide rail 121, so that the front suspension restraint support device 10 can move in the X direction and the Y direction through the front suspension slide rail assembly 12. Front overhang strutting arrangement 13 includes demountable installation's half section structure and half section structure on, and half section structure includes slider 131 and first ring flange 132 down, and the slider 131 bottom is equipped with the recess with Y direction slide rail 14 adaptation, can realize through Y direction slide rail 14 that front overhang strutting arrangement 13 is half section down and remove in the Y direction. The top end of the sliding block 131 is provided with a first lower flange 132. The first half section structure comprises a first upper flange plate 133, a first upright post 134 and a first spherical hinge 135, bolt holes matched with the first upper flange plate 133 and the first lower flange plate 132 are installed on the first upper flange plate 133 and the first lower flange plate 132, the first upright post 134 is installed on the first upper flange plate 133, the first spherical hinge 135 is installed at the top end of the first upright post 134, and the first spherical hinge 135 is used for being connected with a fixed point of a front suspension of a body in white.
As shown in fig. 3, rear overhang restraint support apparatus 20 includes a rear overhang support apparatus 21 and a rear overhang slide rail assembly 22. The rear suspension slide rail assembly 22 comprises a rear suspension X-direction slide rail 221 mounted on the iron floor of the test bed and a rear suspension Y-direction slide rail 222 mounted on the rear suspension X-direction slide rail 221. The rear overhang support 21 includes a lower half structure and an upper half structure that are detachably mounted. The lower half section structure of rear overhang strutting arrangement 21 includes first box 211, first motor 212, first flexible stand 213, flange 214 under the second, and first box 211 bottom is installed on rear overhang Y direction slide rail 222, realizes rear overhang restraint strutting arrangement 20X direction and Y direction removal through rear overhang slide rail set spare 22. Be equipped with the lead screw structure in the first box 211, first flexible stand 213 is installed in the output of lead screw structure, thereby drives the lead screw structure motion through first motor 212 and drives first flexible stand 213 height-adjusting, and second lower flange 214 is installed in first flexible stand 213 upper end. The upper half section structure of the rear overhang supporting device 21 comprises a second upper flange plate 215, a second upright post 216 and a second spherical hinge 217, wherein bolt holes matched with the second upper flange plate 215 and the second lower flange plate 214 are arranged on the second upper flange plate 215 and the second lower flange plate 214, the second upper flange plate and the second lower flange plate are connected through bolts, the second upright post 216 is arranged on the second upper flange plate 215, the second spherical hinge 217 is arranged at the top end of the second upright post 216, and the second spherical hinge 217 is used for being connected with a fixed point of a rear overhang of a white vehicle body.
The pre-supporting devices 30 are respectively arranged at the multi-layer sheet metal flanging positions of the left and right threshold beams of the white car body in a test. As shown in fig. 4, the pre-supporting device 30 includes a second box 31, a second motor 32, a second telescopic column 33 and a positioning mechanism 34, the bottom of the second box 31 is fastened to the iron floor of the test bed, a screw rod structure is disposed in the second box 31, the second telescopic column 33 is mounted at the output end of the screw rod structure, and the second motor 32 drives the screw rod structure to move so as to drive the second telescopic column 33 to adjust the height. A horizontal disc is installed at the upper end of the second telescopic upright post 33, a positioning mechanism 34 is installed on the horizontal disc, the positioning mechanism 34 is composed of two metal protrusions, and a middle gap is used for placing a threshold beam metal plate flanging of a white automobile body.
The servo loading system includes a plurality of servo loading devices 40, as shown in fig. 5, the servo loading devices 40 include a loading body 41, a servo motor 42, and a force sensor 43. As shown in fig. 9, during bending loading, the loading end is a cross bar with high rigidity, and is placed on the rear-row sill beam, and two ends of a bending loading cross bar 45 are connected with a tension and pressure sensor 43 through bending loading screw rods 44. The two bending servo loading devices 40 are respectively arranged on the left and right of the body-in-white symmetrically and fixed on the iron floor. As shown in fig. 10, during the torsion loading, a servo loading device 40 is fixed on the iron floor of the test bed, a tension and pressure sensor 43 on the servo loading device 40 is connected with a mounting point on the T-shaped table 11 through a torsion loading screw rod 46, and the mounting point on the T-shaped table 11 is 1m away from the X-direction rotating shaft 16.
As shown in fig. 6, the vehicle body posture level detecting device 50 includes four laser distance detecting devices, which are arranged right below four vehicle body point locations by taking two bilaterally symmetric points at the front and rear of the body-in-white, respectively, to correct the body-in-white horizontal posture.
As shown in fig. 7-8, the displacement measuring device 60 includes a dial indicator 66 and a supporting device thereof, the supporting device includes a magnetic base 61, a first arm 62, a second arm 63 and an adjustable supporting rib 64, the first arm 62 is vertically installed on the magnetic base 61, the second arm 63 is horizontally installed on the first arm 62 and can move relatively, and the adjustable supporting rib 64 is installed between the two arms so that the supporting device forms a stable triangular structure. The dial indicator 66 is arranged on the supporting device through the dial indicator clamp 65, and the dial indicator clamp 65 is arranged at the tail end of the second arm 63 through the adjustable ball head 67 and can be adjusted in a universal mode. The dial indicator clamp 65 is provided with a vacuole level gauge 68 which is perpendicular to the axis of the measuring slide rod 661 of the dial indicator 66. The dial indicator 66 and the dial indicator clamp 65 are fixedly connected through a fastening device 69.
The data acquisition processing system comprises a CAN acquisition bus, corresponding data acquisition equipment and a computer. Arranging a bus type dial indicator 66 under each measured point, wherein the dial indicator 66 is connected with data acquisition equipment through a CAN (controller area network) acquisition bus, the data acquisition equipment is connected with a computer, and Z-direction displacement data of each measured point of the white car body are acquired in test software; obtaining a static rigidity test result of the body-in-white according to the acquired Z-direction displacement, coordinate data of the body-in-white measuring points and a body-in-white bending and torsional rigidity calculation module in the system, and generating a corresponding curve of the body-in-white Z-direction and torsional angle along with the position change of the measuring points in the X direction according to the data result; and finally generating a body-in-white bending and torsional rigidity test report according to the template of the system.
Correspondingly, the invention also provides a high-efficiency high-precision white vehicle body static stiffness measurement method, which is carried out by adopting the measurement system, and as shown in fig. 11, the method comprises the following steps:
step S1, mounting the white body for the test, which comprises the following steps:
s1.1, respectively connecting the upper half structure of the front suspension supporting device 13 and the rear suspension supporting device 21 with the front and rear suspension fixing points of the body-in-white in a ball hinge mode, so that the upper half support keeps natural sagging.
S1.2, measuring the sheet metal flanging distance of left and right threshold beams of a body-in-white and the distance between upper half structures of a front suspension supporting device 13 by using a measuring tape, arranging the pre-supporting device 30 on a test bed in a bilateral symmetry mode by taking the center line of the floor of the test bed as a symmetry axis, and controlling a second motor 32 to lift a second telescopic upright column 33 of the pre-supporting device 30 to enable the bilaterally symmetrical pre-supporting device 30 to be at the same height to form four supporting points.
S1.3, using a crown block to hoist the body-in-white to the position right above the test bed, placing the body-in-white on the pre-supporting device 30, enabling flanges of the body-in-white to be located in the positioning mechanism, and enabling a front suspension of the body-in-white to be basically located right above the front suspension restraining and supporting device 10.
S1.4, X, Y direction positions of the front suspension constraint supporting device 10 and the rear suspension constraint supporting device 20 are adjusted through the front suspension sliding rail assembly 12 and the rear suspension sliding rail assembly 22 respectively, and the Y-direction distance of the flange plates in the lower half section structure of the front suspension supporting device 13 is adjusted through the Y-direction sliding rail 14, so that the flange plates in the upper half section structure and the lower half section structure of the supporting device corresponding to the front suspension and the rear suspension are aligned and are on the same Z-direction axis, and therefore the center line of a white automobile body and the center line of a test bed are ensured to be in the same plane.
S1.5, descending the second telescopic upright column 33 of the pre-support device 30 to enable the upper and lower half sections of flanges of the front and rear suspension support devices to be in contact, fastening the upper and lower half sections of structures by using bolts, and then descending the second telescopic upright column 33 of the pre-support device 30 and withdrawing the second telescopic upright column from the test area.
S1.6, selecting two pairs of bilaterally symmetrical detection points at the bottom of the body-in-white, arranging four independent laser distance detection devices on the ground, respectively aligning the four detection points, and adjusting the height of the rear suspension support device 21 by comparing the distances from the symmetrical detection points to the laser distance detection devices to ensure the body-in-white to be horizontal.
The mounting mode can ensure that the body-in-white can not generate internal stress in the mounting process.
Step S2, measuring point arrangement: the measuring points are arranged at the front longitudinal beam, the threshold beam and the rear longitudinal beam of the white automobile body at equal intervals, the dial indicator is fixed on the gauge clamp, the magnetic base of the supporting device is connected with the iron floor in a magnetic mode, the measuring head 662 of the measuring slide rod 661 of the dial indicator 66 is in contact with each measuring point of the white automobile body by adjusting the second arm of the dial indicator supporting device, and the gauge clamp on the second arm is adjusted according to the liquid bubble type level gauge, so that the measuring telescopic rod of the dial indicator is perpendicular to the floor pasted on the test bed.
Step S3, bending rigidity test: the computer control unit controls the servo loading device to load the body-in-white, and the body-in-white is restrained and fixed on the test bed to enable the body-in-white to generate Z-direction bending deformation. Load numerical values are obtained through a tension pressure sensor of the servo loading device, and bending loads are transmitted to a computer control unit through a signal line so as to realize servo control on the loading mechanism. The bending deformation of the body-in-white is obtained through a dial indicator at a measuring point below the body-in-white, the bending deformation is transmitted to the computer control unit through the CAN line and the data acquisition equipment, the computer control unit carries out data processing on the load and the deformation according to a set operation program, and the bending rigidity value and the corresponding bending line of the body-in-white are output.
Step S4, torsional rigidity test: the servo loading device is controlled by the computer control unit to load the body-in-white, and the body-in-white is restrained and fixed on the test bed, so that the T-shaped table 11 drives the body-in-white to generate torsional deformation. Load numerical values are obtained through a tension pressure sensor of the servo loading device, and torsional loads are transmitted to the computer control unit through a signal line so as to realize servo control on the loading mechanism. The torsional deformation of the body-in-white is obtained through a dial indicator at a measuring point below the body-in-white, the torsional deformation is transmitted to the computer control unit through a CAN line and a data acquisition device, the computer control unit processes the deformation according to a set operation program to obtain the torsional angle of the body-in-white, and then the torsional rigidity value of the tested body-in-white is calculated according to the torsional angle and the torsional load.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An efficient high-precision white body static stiffness measuring system comprises a constraint support system and a servo loading system, wherein the constraint support system comprises a front suspension constraint support device (10) and a rear suspension constraint support device (20); it is characterized in that the preparation method is characterized in that,
the front suspension constraint supporting device (10) comprises a T-shaped table (11), a front suspension sliding rail assembly (12), a front suspension supporting device (13) and a base (17); the T-shaped table (11) comprises a cross arm (111) and a vertical arm (112), the lower end of the vertical arm (112) is hinged with the base (17) through a Z-direction rotating shaft (15), and the upper end of the vertical arm (112) is hinged with the cross arm (111) through an X-direction rotating shaft (16); the base (17) is matched with the front suspension sliding rail assembly (12) and can move in the X direction and the Y direction; the upper end of the cross arm (111) is provided with a Y-direction slide rail (14); the front suspension supporting device (13) comprises a lower half-section structure and an upper half-section structure which are detachably mounted, wherein the bottom end of the lower half-section structure is mounted on a Y-direction sliding rail (14) to realize Y-direction movement, and the top end of the upper half-section structure is connected with a fixed point of a white vehicle body front suspension;
the rear suspension constraint supporting device (20) comprises a rear suspension supporting device (21) and a rear suspension sliding rail assembly (22), wherein the rear suspension supporting device (21) comprises a lower half-section structure and an upper half-section structure which are detachably mounted, the bottom end of the lower half-section structure is mounted on the rear suspension sliding rail assembly (22) and can move in the X direction and the Y direction, and the lower half-section structure comprises a first telescopic upright post (213) for adjusting the height of the rear suspension supporting device (21);
the restraint support system further comprises a pre-support device (30), the pre-support device (30) is erected below the left and right threshold beams of the body-in-white respectively in a test, and the pre-support device (30) comprises a second telescopic upright post (33) used for adjusting the height of the pre-support device (30);
the servo loading system is used for bending loading or torsion loading on the body-in-white.
2. The efficient high-precision white body static stiffness measuring system according to claim 1, wherein the measuring system further comprises a body attitude level detecting device (50), and the body attitude level detecting device (50) comprises four laser distance detecting devices, and the four laser distance detecting devices are arranged right below four body point positions by taking two bilaterally symmetrical points in front of and behind the white body to correct the white body horizontal attitude.
3. The system for measuring the static stiffness of the white vehicle body with high efficiency and high precision according to claim 1 is characterized by further comprising a displacement measuring device (60) arranged below the measured point, wherein the displacement measuring device (60) comprises a dial indicator (66) and a supporting device thereof, the dial indicator (66) is installed on the supporting device through a dial indicator clamp (65), and a vacuole type level gauge (68) perpendicular to the axis of a measuring slide rod (661) of the dial indicator (66) is arranged on the dial indicator clamp (65).
4. The system for measuring the static stiffness of the white body with high efficiency and high precision according to claim 3 is characterized by further comprising a data acquisition and processing system, wherein the data acquisition and processing system comprises an acquisition bus, corresponding data acquisition equipment and a computer, the dial indicator (66) is connected with the data acquisition equipment through the acquisition bus, the data acquisition equipment is connected with the computer, the data acquisition equipment acquires digital signals and then transmits displacement data to the computer control unit, and the white body bending and torsional stiffness calculating system reads the displacement values and then outputs the bending and torsional stiffness values of the white body through a calculation processing program.
5. The efficient high-precision white body static stiffness measuring system according to claim 1, wherein the lower half structure of the front suspension supporting device (13) comprises a sliding block (131) and a first lower flange (132), the bottom end of the sliding block (131) is provided with a groove matched with the Y-direction sliding rail (14), and the top end of the sliding block (131) is provided with the first lower flange (132); the upper half section structure of the front overhang supporting device (13) comprises a first upper flange plate (133), a first upright post (134) and a first spherical hinge (135), bolt holes matched with the first upper flange plate (133) and the first lower flange plate (132) are arranged on the first upper flange plate (133) and the first lower flange plate (132), the first upper flange plate and the first lower flange plate are connected through bolts, the first upright post (134) is arranged on the first upper flange plate (133), the first spherical hinge (135) is arranged at the top end of the first upright post (134), and the first spherical hinge (135) is used for being connected with a fixed point of a front overhang of a white automobile body.
6. The efficient high-precision body-in-white stiffness measurement system according to claim 1, wherein the front suspension slide rail assembly (12) comprises a front suspension Y-direction slide rail (122) mounted on the ground and a front suspension X-direction slide rail (121) mounted on the front suspension Y-direction slide rail (122), and the base (17) is mounted on the front suspension X-direction slide rail (121).
7. The system for measuring the static stiffness of the white vehicle body with high efficiency and high precision according to claim 1, wherein the lower half section structure of the rear suspension supporting device (21) further comprises a first box body (211), a first motor (212) and a second lower flange plate (214), a screw rod structure is arranged in the first box body (211), the first telescopic upright post (213) is installed at the output end of the screw rod structure, the screw rod structure is driven by the first motor (212) to move so as to drive the first telescopic upright post (213) to adjust the height, and the second lower flange plate (214) is installed at the upper end of the first telescopic upright post (213); the upper half section structure of the rear overhang supporting device (21) comprises a second upper flange plate (215), a second upright post (216) and a second spherical hinge (217), bolt holes matched with the bolt holes are formed in the second upper flange plate (215) and a second lower flange plate (214) and connected through bolts, the second upright post (216) is installed on the second upper flange plate (215), the second spherical hinge (217) is installed at the top end of the second upright post (216), and the second spherical hinge (217) is used for being connected with a fixed point of a rear overhang of a body in white.
8. The efficient high-precision body-in-white static stiffness measurement system according to claim 1, wherein the rear suspension slide rail assembly (22) comprises a rear suspension X-direction slide rail (221) mounted on the ground and a rear suspension Y-direction slide rail (222) mounted on the rear suspension X-direction slide rail (221), and the rear suspension support device (21) is mounted on the rear suspension Y-direction slide rail (222).
9. The high-efficiency high-precision white vehicle body static stiffness measuring system according to claim 1, wherein the pre-supporting device (30) further comprises a second box body (31), a second motor (32) and a positioning mechanism (34), a screw rod structure is arranged in the second box body (31), the second telescopic upright post (33) is installed at the output end of the screw rod structure, the second motor (32) drives the screw rod structure to move so as to drive the second telescopic upright post (33) to adjust the height, and the positioning mechanism (34) is installed at the top end of the second telescopic upright post (33) and is installed in a matched mode with a threshold beam metal plate flanging of a white vehicle body.
10. An efficient high-precision white body static stiffness measurement method is characterized by being carried out by adopting the measurement system of any one of claims 1-7, and comprising the following steps of:
step S1, mounting the white body for the test, which comprises the following steps:
s1.1, respectively connecting the upper half-section structures of a front suspension supporting device (13) and a rear suspension supporting device (21) with front and rear suspension fixing points of a body-in-white in a ball hinge mode to enable the upper half-section support to keep natural sagging;
s1.2, measuring the sheet metal flanging distance of left and right threshold beams of a body-in-white and the distance between upper half structures of a front suspension supporting device (13), arranging a pre-supporting device (30) on a test bench in a bilateral symmetry manner by taking the center line of the floor of the test bench as a symmetry axis, and controlling a second motor (32) to lift a second telescopic upright post (33) of the pre-supporting device (30) to enable the bilaterally symmetrical pre-supporting device (30) to be at the same height to form four supporting points;
s1.3, hanging the body-in-white over a test bed, placing the body-in-white on a pre-supporting device (30), enabling flanges of the body-in-white to be located in a positioning mechanism, and enabling a front suspension of the body-in-white to be basically located over a front suspension restraining and supporting device (10);
s1.4, X, Y direction positions of a front suspension restraint supporting device (10) and a rear suspension restraint supporting device (20) are adjusted through a front suspension sliding rail assembly (12) and a rear suspension sliding rail assembly (22) respectively, and the Y-direction distance of the lower half structure of the front suspension supporting device (13) is adjusted through a Y-direction sliding rail (14), so that the upper half structure and the lower half structure of the front suspension supporting device and the lower half structure of the rear suspension supporting device are aligned and are on the same Z-direction axis, and therefore the center line of a white vehicle body and the center line of a test bed are guaranteed to be in the same plane;
s1.5, descending a second telescopic upright post (33) of the pre-supporting device (30), enabling upper and lower half-section structures of the front and rear suspension supporting devices to be in contact, fixedly connecting the upper and lower half-section structures together through a connecting piece, then descending the second telescopic upright post (33) of the pre-supporting device (30), and withdrawing the second telescopic upright post from a test area;
s1.6, selecting N pairs of bilaterally symmetrical detection points at the bottom of a body-in-white, arranging 2N independent laser distance detection devices on the ground, respectively aligning the detection points, and adjusting the height of a rear suspension support device (21) by comparing the distances from the symmetrical detection points to the laser distance detection devices to ensure that the body-in-white is horizontal;
step S2, measuring point arrangement: measuring points are arranged at the front longitudinal beam, the threshold beam and the rear longitudinal beam of the white automobile body at equal intervals, and a displacement measuring device is arranged under each measuring point, so that a measuring head (662) of a measuring slide rod (661) of a dial indicator (66) is in contact with each measuring point of the white automobile body;
step S3, bending rigidity test: the computer control unit controls the servo loading device to load the body-in-white, and the body-in-white is restrained and fixed on the test bed to enable the body-in-white to generate Z-direction bending deformation; a load numerical value is obtained through a tension pressure sensor of the servo loading device, and a bending load is transmitted to a computer control unit through a signal line so as to realize servo control on a loading mechanism; the bending deformation of the body-in-white is obtained through a dial indicator at a measuring point below the body-in-white, the bending deformation is transmitted to a computer control unit through a CAN line and data acquisition equipment, the computer control unit carries out data processing on the load and the deformation according to a set operation program, and the bending rigidity value and the corresponding bending line of the body-in-white are output;
step S4, torsional rigidity test: the servo loading device is controlled by the computer control unit to load the body-in-white, and the body-in-white is restrained and fixed on the test bed, so that the T-shaped table (11) drives the body-in-white to generate torsional deformation; a load numerical value is obtained through a tension pressure sensor of the servo loading device, and a torsional load is transmitted to a computer control unit through a signal line so as to realize servo control on a loading mechanism; the torsional deformation of the body-in-white is obtained through a dial indicator at a measuring point below the body-in-white, the torsional deformation is transmitted to the computer control unit through a CAN line and a data acquisition device, the computer control unit processes the deformation according to a set operation program to obtain the torsional angle of the body-in-white, and then the torsional rigidity value of the tested body-in-white is calculated according to the torsional angle and the torsional load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370160.7A CN112414652B (en) | 2020-11-30 | 2020-11-30 | Efficient high-precision white car body static rigidity measurement system and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011370160.7A CN112414652B (en) | 2020-11-30 | 2020-11-30 | Efficient high-precision white car body static rigidity measurement system and test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112414652A true CN112414652A (en) | 2021-02-26 |
| CN112414652B CN112414652B (en) | 2021-09-07 |
Family
ID=74830510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011370160.7A Active CN112414652B (en) | 2020-11-30 | 2020-11-30 | Efficient high-precision white car body static rigidity measurement system and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112414652B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112861265A (en) * | 2021-03-03 | 2021-05-28 | 东风汽车集团股份有限公司 | White vehicle body torsional rigidity simulation calculation method |
| CN113432891A (en) * | 2021-06-29 | 2021-09-24 | 江铃汽车股份有限公司 | Device and method for testing static bending rigidity of cab of flat-head truck |
| CN113834619A (en) * | 2021-09-29 | 2021-12-24 | 安徽江淮汽车集团股份有限公司 | Method and system for testing bending stiffness of body-in-white |
| CN113865881A (en) * | 2021-08-31 | 2021-12-31 | 东风柳州汽车有限公司 | Rigidity test device |
| CN114112263A (en) * | 2021-11-19 | 2022-03-01 | 西安航空学院 | Vibration testing device capable of adjusting automobile posture |
| CN114563198A (en) * | 2022-03-03 | 2022-05-31 | 北京汽车集团越野车有限公司 | Suspension device |
| DE102021125193A1 (en) | 2021-09-29 | 2023-03-30 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method and device for operating a measuring device for a component |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281085A (en) * | 2007-12-27 | 2008-10-08 | 奇瑞汽车股份有限公司 | Car white vehicle body structure static angular rigidity testing system and testing method thereof |
| CN201193971Y (en) * | 2007-12-27 | 2009-02-11 | 奇瑞汽车股份有限公司 | Car white vehicle body structure static angular rigidity testing system |
| CN205788214U (en) * | 2016-02-05 | 2016-12-07 | 上海筑邦测控科技有限公司 | A kind of online monitoring sensor based on image recognition principle |
| CN207881915U (en) * | 2018-03-14 | 2018-09-18 | 安徽江淮汽车集团股份有限公司 | Automobile Static stiffness test bracket |
| CN109186898A (en) * | 2018-06-28 | 2019-01-11 | 纽威数控装备（苏州）有限公司 | A kind of Static stiffness measuring device and its measurement method |
| CN110145999A (en) * | 2019-06-17 | 2019-08-20 | 郑州机械研究所有限公司 | A kind of method of the taper of circular conical surface on inspection center axis |
| CN211178280U (en) * | 2019-11-13 | 2020-08-04 | 青建集团股份公司 | Verticality detection device easy and convenient to operate |
| CN111964915A (en) * | 2020-07-03 | 2020-11-20 | 中国第一汽车股份有限公司 | System and method for testing torsional rigidity of whole passenger vehicle |
-
2020
- 2020-11-30 CN CN202011370160.7A patent/CN112414652B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281085A (en) * | 2007-12-27 | 2008-10-08 | 奇瑞汽车股份有限公司 | Car white vehicle body structure static angular rigidity testing system and testing method thereof |
| CN201193971Y (en) * | 2007-12-27 | 2009-02-11 | 奇瑞汽车股份有限公司 | Car white vehicle body structure static angular rigidity testing system |
| CN205788214U (en) * | 2016-02-05 | 2016-12-07 | 上海筑邦测控科技有限公司 | A kind of online monitoring sensor based on image recognition principle |
| CN207881915U (en) * | 2018-03-14 | 2018-09-18 | 安徽江淮汽车集团股份有限公司 | Automobile Static stiffness test bracket |
| CN109186898A (en) * | 2018-06-28 | 2019-01-11 | 纽威数控装备（苏州）有限公司 | A kind of Static stiffness measuring device and its measurement method |
| CN110145999A (en) * | 2019-06-17 | 2019-08-20 | 郑州机械研究所有限公司 | A kind of method of the taper of circular conical surface on inspection center axis |
| CN211178280U (en) * | 2019-11-13 | 2020-08-04 | 青建集团股份公司 | Verticality detection device easy and convenient to operate |
| CN111964915A (en) * | 2020-07-03 | 2020-11-20 | 中国第一汽车股份有限公司 | System and method for testing torsional rigidity of whole passenger vehicle |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112861265A (en) * | 2021-03-03 | 2021-05-28 | 东风汽车集团股份有限公司 | White vehicle body torsional rigidity simulation calculation method |
| CN113432891A (en) * | 2021-06-29 | 2021-09-24 | 江铃汽车股份有限公司 | Device and method for testing static bending rigidity of cab of flat-head truck |
| CN113432891B (en) * | 2021-06-29 | 2023-03-21 | 江铃汽车股份有限公司 | Device and method for testing static bending rigidity of cab of flat-head truck |
| CN113865881A (en) * | 2021-08-31 | 2021-12-31 | 东风柳州汽车有限公司 | Rigidity test device |
| CN113834619A (en) * | 2021-09-29 | 2021-12-24 | 安徽江淮汽车集团股份有限公司 | Method and system for testing bending stiffness of body-in-white |
| DE102021125193A1 (en) | 2021-09-29 | 2023-03-30 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method and device for operating a measuring device for a component |
| DE102021125193B4 (en) | 2021-09-29 | 2023-05-25 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method and device for operating a measuring device for a component |
| CN114112263A (en) * | 2021-11-19 | 2022-03-01 | 西安航空学院 | Vibration testing device capable of adjusting automobile posture |
| CN114112263B (en) * | 2021-11-19 | 2023-08-04 | 西安航空学院 | Vibration testing device capable of adjusting automobile posture |
| CN114563198A (en) * | 2022-03-03 | 2022-05-31 | 北京汽车集团越野车有限公司 | Suspension device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112414652B (en) | 2021-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112414652B (en) | Efficient high-precision white car body static rigidity measurement system and test method | |
| CN108801548B (en) | Vehicle mass center measuring tool and measuring method | |
| CN113029415A (en) | Non-interference multi-component solid rocket engine thrust measurement system and installation measurement method | |
| CN105784277A (en) | High-speed motor train unit train body center of mass measurement device and measurement method thereof | |
| CN107588892A (en) | A kind of panel assembly quality center of mass measuring system and measuring method | |
| CN105115685B (en) | Car body mass center test macro and method based on vehicle vibration test platform | |
| CN110954019A (en) | Large-inclination-angle free-form surface measuring method and device based on reference plane comparison measurement | |
| CN208333826U (en) | A kind of static submissive system safety testing device of industrial robot | |
| CN111964915B (en) | System and method for testing torsion rigidity of whole passenger vehicle | |
| CN202692959U (en) | Horizontal arm type three-dimensional measuring ruling machine | |
| CN111366384A (en) | Detection and adjustment equipment for bogie of high-speed rail and motor car | |
| CN103542818A (en) | Wallboard part detecting device | |
| CN210719489U (en) | Grid cell clamping force detection device | |
| CN106514526B (en) | The mounting and clamping system and method for bogie frame | |
| CN115628866A (en) | Full-automatic three-dimensional deformation measurement positioning loading system and using method thereof | |
| CN214120969U (en) | Detection apparatus for car battery support | |
| CN114905431A (en) | Body-in-white shock tower positioning device, positioning method and detection method | |
| CN207689072U (en) | A kind of panel assembly quality center of mass measuring system | |
| CN210375036U (en) | Large-scale part plane detection device | |
| CN114111716A (en) | System and method for detecting gradient of contact net positioner | |
| CN209147901U (en) | For detecting the detection device of torsion beam wheel side bracket | |
| CN111664997A (en) | Measuring equipment and measuring method for mass center coordinates of cab of commercial vehicle | |
| CN111795698A (en) | High-speed track detection and installation device | |
| CN216006458U (en) | Dynamic calibration device for inertia pack of train track detection system | |
| CN110261134A (en) | New-energy automobile power assembly off-line test platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |