CN109764840A - A kind of Vehicular hub bounce testing machine verifying simulation wheel hub and verification method - Google Patents
A kind of Vehicular hub bounce testing machine verifying simulation wheel hub and verification method Download PDFInfo
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Abstract
The invention discloses a kind of Vehicular hub bounce testing machine verifying simulation wheel hub and verification methods, the Vehicular hub bounce testing machine verifying simulation wheel hub includes the outer toroid being fixed to each other, end plate and clamping portion, the end plate is located at one end of the outer toroid, and the end plate is fixed on by dismountable mode in the clamping portion；The clamping portion includes the first positioning hole of at least one positioning and clamping, and the first positioning hole is cylindrical hole, and the cylindricity of the first positioning hole is less than preset value；The excircle of the outer toroid includes that two circles preset axial length, and bus is parallel to the measurement cylindrical surface of the axis of the first positioning hole, and the circle glitch detection value on the measurement cylindrical surface is preset second harmonic jerk value.Vehicular hub of the invention beats testing machine verifying with wheel hub and verification method, energy accurate validation bounce testing machine, and long service life is simulated, and will not obscure with ordinary motor vehicle wheel hub.
Description
Technical Field
The invention relates to a motor vehicle wheel manufacturing technology, in particular to a simulation wheel hub for motor vehicle wheel hub jumping testing machine verification and a verification method.
Background
The wheel hub jump tester for motor vehicle is a special detector for detecting the wheel hub jump amount of motor vehicle. Since a wheel hub of a vehicle (hereinafter, referred to as a wheel hub) is deformed during machining and heat treatment, and the shape of the wheel hub is deviated, it is required to perform detection by a run-out tester. The most common shape deviation is that the outer circle of the hub is oval, and after the outer circumference of the hub is oval, the circular run-out fluctuation increase of the outer circle of the hub can be measured through a run-out testing machine. Specifically, when the hub with the oval outer circle is detected on a run-out tester, a maximum value (peak value) of 2 run-out values and a minimum value (valley value) of 2 run-out values appear in a rotating circle, and the circular run-out values with 2 peak values and 2 valley values in one rotating cycle are called second harmonic run-out values in engineering. The hub with the second harmonic runout can cause the phenomenon of jolting in the driving process of the motor vehicle, and is not safe and comfortable enough for users. Such hubs should be detected to avoid mounting to the vehicle. Therefore, the general hub finished products need to be subjected to the runout detection, and hub manufacturers are provided with the motor vehicle hub runout testing machine.
The motor vehicle hub jump testing machine is divided into a contact type and a non-contact type according to a detection mode. The contact type detection principle is that the measuring component is in contact with the inner side bead seat and the outer side bead seat of the detected hub, and when the hub rotates, the jumping amount of the inner side bead seat and the outer side bead seat is transmitted to the displacement sensor through the measuring component, so that the detection of the jumping amount of the hub is realized. The non-contact type jumping detection testing machine adopts laser as a detection source, directly projects the laser on the inner and outer side tire bead seats of the detected wheel hub, and calculates the jumping amount of the wheel hub when rotating by detecting reflected light.
However, since all wheel hubs are to be detected, the detection amount is relatively large, and any type of wheel hub testing machine for a motor vehicle gradually wears during use to lose the detection precision, so that a verification wheel hub (i.e., a defective product) with a determined second harmonic runout value is required to verify the accuracy and stability of the second harmonic runout of the runout testing machine, so as to ensure that the detection data of the runout testing machine are accurate and reliable. Meanwhile, when different hub runout testing machines need to be detected and compared, a verification hub with a confirmed second harmonic runout value is also needed to complete comparison of detection results of the second harmonic runout values among different devices.
However, the following problems arise when using a conventional hub directly for verification:
1) the common hubs are produced in batches, the quality is stable, a certain second harmonic runout value needs to be found, and the second harmonic runout value is relatively large and is not easy to find;
2) the verification hub that ordinary hub does changes the second harmonic volume of beating numerical value easily because of wearing and tearing after detecting many times on the testing machine that beats, leads to verifying inaccurately.
3) The verification hub made by the common hub is easy to be confused with the common hub after verification and flows into a next channel, so that the verified hub is lost and a defective product flows into the next channel.
Disclosure of Invention
In view of this, the embodiment of the invention is expected to provide a simulated hub for verifying a hub runout tester of a motor vehicle and a verification method, which can accurately verify the runout tester, have long service life and cannot be confused with a common motor vehicle hub.
In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:
the embodiment of the invention provides a simulation hub for verifying a hub run-out tester of a motor vehicle, which comprises an outer ring, an end plate and a clamping part, wherein the outer ring, the end plate and the clamping part are fixed with each other; the clamping part comprises at least one first positioning hole for positioning and clamping, the first positioning hole is a cylindrical hole, and the cylindricity of the first positioning hole is smaller than a preset value; the outer circumference of the outer ring comprises two circles of measuring cylindrical surfaces with preset axial lengths, the generatrix of each measuring cylindrical surface is parallel to the axis of the first positioning hole, and the circle run-out detection values of the measuring cylindrical surfaces are preset second harmonic run-out values.
In the above scheme, the clamping part further comprises a boss assembled with the end plate, the end plate comprises a second positioning hole matched with the boss, and after the boss is installed in the second positioning hole, the parallelism between the generatrix of the measurement cylindrical surface and the axis of the first positioning hole is smaller than a preset value.
In the above scheme, two circles of the measuring cylindrical surfaces are aligned at the radial outer ends, and the radial size of the outer circumference of the outer ring between the two circles of the measuring cylindrical surfaces is smaller than that of the measuring cylindrical surfaces.
In the scheme, the outer sides of the two circles of the measurement cylindrical surfaces are provided with measurement vertical surfaces, and the included angle between each measurement vertical surface and the corresponding measurement cylindrical surface is 80-90 degrees.
In the above scheme, clamping part still include with jump testing machine complex terminal surface locating surface, the terminal surface locating surface is located clamping part's one end, the terminal surface locating surface with the straightness that hangs down of the axis in first locating hole is less than the default.
In the above scheme, the clamping part further comprises at least two threaded holes, the axial direction of the threaded holes is the same as the axial direction of the first positioning holes, and the end plate further comprises screw through holes matched with the threaded holes in position; the fixing of the clamping part and the end plate comprises: and after the boss and the second positioning hole are assembled, a screw penetrates through the screw through hole and is screwed into the threaded hole for fixing.
In the above scheme, the end plate is provided with at least two weight-reducing holes which are uniformly distributed along the circumference, and the radial distance between the weight-reducing holes and the measuring cylindrical surface is greater than a preset value.
The embodiment of the invention also provides a verification method of the motor vehicle hub run-out testing machine, which comprises the following steps:
clamping the simulated hub to a first run-out testing machine to measure circular run-out and perform data processing to obtain first data;
when the first data meet the preset requirements, clamping the simulation wheel hub to a second run-out testing machine for measurement and verification, and obtaining second data;
when the second data meet the preset requirement, determining that the measurement precision of the second jitter tester meets the first preset requirement, otherwise, determining that the measurement precision of the second jitter tester does not meet the first preset requirement; wherein,
the first jump testing machine accords with the jump testing machine of predetermineeing the second requirement for known measurement accuracy, the second jump testing machine is unknown measurement accuracy's jump testing machine.
In the above-mentioned scheme, will simulate wheel hub clamping and survey circle to beat and data processing to first testing machine of beating, obtain first data, include:
clamping the simulation hub to the first run-out testing machine, wherein the first run-out testing machine respectively measures circular run-out of a preset part of the simulation hub in the radial direction and the axial direction, at least 64 points are measured in each direction, and the detection is repeated for at least 3 times to obtain a first circular run-out value;
performing Fourier transform on the first circle run-out value to obtain a second circle run-out value after the clamping error of the simulated hub is removed;
and carrying out preset statistical processing on the second circle run-out value to obtain first data for simulating the fluctuation conditions of the circle run-out values of the hub in the radial direction and the axial direction.
In the above-mentioned scheme, when first data accord with and predetermine the requirement, will simulation wheel hub clamping arrives the second testing machine that beats and measures and verifies to obtain the second data, include:
when the first data meet the preset requirements, the simulation wheel hub is clamped to the second jumping testing machine, the second jumping testing machine respectively measures circle jumping of the preset position of the simulation wheel hub in the radial direction and the axial direction, at least 64 points are measured in each direction, then the clamping is repeated at least 3 times, the clamping is detected every time, the detection data are subjected to preset analysis processing, and the second data are obtained.
The invention discloses a simulation hub for verifying a wheel hub run-out tester of a motor vehicle and a verification method, wherein the simulation hub comprises an outer circular ring, an end plate and a clamping part which are fixed with each other, the end plate is positioned at one end of the outer circular ring, and the clamping part is fixed on the end plate in a detachable mode; the clamping part comprises at least one first positioning hole for positioning and clamping, the first positioning hole is a cylindrical hole, and the cylindricity of the first positioning hole is smaller than a preset value; the outer circumference of the outer ring comprises two circles of measuring cylindrical surfaces with preset axial lengths, the generatrix of each measuring cylindrical surface is parallel to the axis of the first positioning hole, and the circular runout detection values of the measuring cylindrical surfaces are preset second harmonic runout amounts; therefore, the simulated hub and the verification method for verifying the wheel hub jumping tester of the motor vehicle disclosed by the embodiment of the invention can accurately verify the jumping tester, have long service life and cannot be confused with a common motor vehicle hub.
Other beneficial effects of the embodiments of the present invention will be further described in conjunction with the specific technical solutions in the detailed description.
Drawings
FIG. 1 is a schematic view of a simulated hub for verification of a hub runout tester of a motor vehicle according to an embodiment of the invention;
FIG. 2 is a schematic view of the right side view of FIG. 1;
FIG. 3 is a schematic view of a clamping portion in a simulated hub for verification of a hub runout testing machine of a motor vehicle according to an embodiment of the invention;
fig. 4 is a schematic flow chart illustrating a verification method of a wheel hub runout tester according to a second embodiment of the present invention.
Detailed Description
It should be noted that, unless otherwise specified and limited, the term "connected" in the description of the embodiments of the present invention is to be understood broadly, and for example, the term may be an electrical connection, a communication between two elements, a direct connection, or an indirect connection through an intermediate medium, and a specific meaning of the term may be understood by those skilled in the art according to specific situations.
It should be noted that the terms "first \ second \ third" related to the embodiments of the present invention merely distinguish similar objects, and do not represent a specific ordering for the objects, and it should be understood that "first \ second \ third" may exchange a specific order or sequence when allowed.
The embodiment of the invention provides a simulation hub for verifying a hub run-out tester of a motor vehicle, which comprises an outer ring, an end plate and a clamping part, wherein the outer ring, the end plate and the clamping part are fixed with each other; the clamping part comprises at least one first positioning hole for positioning and clamping, the first positioning hole is a cylindrical hole, and the cylindricity of the first positioning hole is smaller than a preset value; the outer circumference of the outer ring comprises two circles of measuring cylindrical surfaces with preset axial lengths, the generatrix of each measuring cylindrical surface is parallel to the axis of the first positioning hole, and the circle run-out detection values of the measuring cylindrical surfaces are preset second harmonic run-out values.
Here, the measurement cylindrical surface is a surface for measuring circular run-out; the simulation wheel hub passes through first locating hole is fixed in motor vehicle wheel hub run-out testing machine, motor vehicle wheel hub run-out testing machine is provided with the anchor clamps that include the tight post that rises, the tight post that rises inserts rise after the first locating hole, will simulation wheel hub presss from both sides tightly. The outer ring and the end plate can be integrally formed, so that the position accuracy of the outer ring and the end plate is higher, and the manufacturing cost is low.
The cylindricity of the first positioning hole is smaller than a preset value, so that the positioning is more accurate; the axial length of the measuring cylindrical surface is preset so as to facilitate the contact of a measuring head for measuring circular run-out; the circle run-out detection values of the measurement cylindrical surfaces are all preset second harmonic run-out values, namely the simulation wheel hub is an unqualified product, and the reason of the unqualified product is an ellipse, so that the wheel hub run-out testing machine of the motor vehicle can be verified.
The simulated hub for verifying the wheel hub jumping tester of the motor vehicle hub provided by the embodiment of the invention can accurately verify the jumping tester, has long service life and cannot be confused with a common motor vehicle hub.
In an embodiment, the clamping part further includes a boss assembled with the end plate, the end plate includes a second positioning hole matched with the boss, and after the boss is installed in the second positioning hole, the parallelism between the generatrix of the measurement cylindrical surface and the axis of the first positioning hole is smaller than a preset value. Thus, the clamping part and the end plate are assembled more easily, and the mutual position relation is positioned more accurately. After the boss is arranged in the second positioning hole, the parallelism between the generatrix of the measuring cylindrical surface and the axis of the first positioning hole is smaller than a preset value, which puts requirements on the size, the shape and the position of the boss and the second positioning hole.
In one embodiment, two turns of the measuring cylinder are aligned at the radially outer end, and the outer circumference of the outer ring between the two turns of the measuring cylinder has a smaller radial dimension than the measuring cylinder. The two circles of measuring cylindrical surfaces are aligned at the radial outer ends, namely the outer circular surfaces are equal in height on the horizontal plane, so that the measuring is convenient, and the circular runout detecting head is easier to arrange. The radial size of the outer circumference between the two circles of the measuring cylindrical surfaces is smaller than that of the measuring cylindrical surfaces, so that the situation that the measuring precision is influenced due to the fact that the circle run-out detecting head is touched is avoided.
In one embodiment, the outer sides of the two circles of the measuring cylindrical surfaces are provided with measuring vertical surfaces, and the included angle between each measuring vertical surface and the measuring cylindrical surface is 80-90 degrees. In this way, in addition to measuring radial circular run-out, also axial circular run-out, i.e. outer circular run-out, can be measured, i.e. end circular run-out. The included angle between the vertical measuring surface and the cylindrical measuring surface is 80-90 degrees, so that a radial measuring head for measuring radial circular runout and an axial measuring head for measuring axial circular runout can be conveniently and simultaneously placed.
In an embodiment, clamping portion still include with jump testing machine complex terminal surface locating surface, the terminal surface locating surface is located clamping portion's one end, the terminal surface locating surface with the straightness that hangs down of the axis of first locating hole is less than the default, and good straightness that hangs down promptly enables simulation wheel hub's location more accurate. On the basis of positioning through the first positioning hole, the end face positioning surface is added, so that the positioning is more reliable. It can be understood that if the cylindricity of the first positioning hole and the parallelism of the measuring cylindrical surface meet the preset requirement, only the first positioning hole can be accurately positioned.
In one embodiment, the clamping part further comprises at least two threaded holes, the axial direction of each threaded hole is the same as that of the first positioning hole, and the end plate further comprises a screw through hole matched with the position of each threaded hole; the fixing of the clamping part and the end plate comprises: and after the boss and the second positioning hole are assembled, a screw penetrates through the screw through hole and is screwed into the threaded hole for fixing. Thus, the fixing is simple and the assembly and disassembly are convenient.
In one embodiment, the end plate is provided with at least two weight-reducing holes which are uniformly distributed along the circumference, and the radial distance between the weight-reducing holes and the measuring cylindrical surface is larger than a preset value. Therefore, the phenomenon that the simulated hub is too heavy and the load of the hub jump testing machine of the motor vehicle is increased is avoided, and the clamp is easy to loosen and the position is deviated due to too heavy weight. And the radial distance between the lightening hole and the measuring cylindrical surface is larger than a preset value, so that the strength of the simulated hub is ensured.
The embodiment of the invention also provides a verification method of the motor vehicle hub run-out testing machine, which comprises the following steps:
clamping the simulated hub to a first run-out testing machine to measure circular run-out and perform data processing to obtain first data;
when the first data meet the preset requirements, clamping the simulation wheel hub to a second run-out testing machine for measurement and verification, and obtaining second data;
when the second data meet the preset requirement, determining that the measurement precision of the second jitter tester meets the first preset requirement, otherwise, determining that the measurement precision of the second jitter tester does not meet the first preset requirement; wherein,
the first jump testing machine accords with the jump testing machine of predetermineeing the second requirement for known measurement accuracy, the second jump testing machine is unknown measurement accuracy's jump testing machine.
Here, the first data is used for detecting whether the simulated hub meets a preset requirement, and the first run-out testing machine which is used for measuring work is of known measuring precision; the preset requirement is that the fluctuation of the circular runout amount of the simulation hub meets the preset requirement, and specifically, the circular runout detection value of the measurement cylindrical surface of the simulation hub is a preset second harmonic runout amount, namely a typical unqualified product.
The second data meet the preset requirements, that is, the fluctuation condition of the circular run-out of the simulated hub detected by the run-out testing machine with unknown measurement accuracy meets the actual circular run-out fluctuation condition of the simulated hub, namely, the second data are very close to the first data.
The first predetermined requirement is an accuracy required for normal inspection of the wheel hub of the motor vehicle, and the second predetermined requirement is an accuracy one level higher than the accuracy required for normal inspection of the wheel hub of the motor vehicle. Just as a standard weight can verify the accuracy of the balance.
In one embodiment, the clamping of the simulated hub to the first run-out testing machine for measuring circular run-out and data processing to obtain first data includes:
clamping the simulation hub to the first run-out testing machine, wherein the first run-out testing machine respectively measures circular run-out of a preset part of the simulation hub in the radial direction and the axial direction, at least 64 points are measured in each direction, and the detection is repeated for at least 3 times to obtain a first circular run-out value; because the measuring points are more in number and the detection is carried out for many times, more accurate detection data can be obtained;
performing Fourier transform on the first circle run-out value to obtain a second circle run-out value after the clamping error of the simulated hub is removed; the clamping error is an error caused by inaccurate positioning in clamping;
and carrying out preset statistical processing on the second circle run-out value to obtain first data for simulating the fluctuation conditions of the circle run-out values of the hub in the radial direction and the axial direction.
Here, the preset portion may be the measurement cylindrical surface and the measurement vertical surface, that is, the circular runout of the simulated hub in both the radial direction and the axial direction may be detected simultaneously; the preset statistical processing is to perform statistical processing such as calculating standard deviation on the obtained circular runout data, and draw a sine curve according to the statistical processing. At least 64 points are measured in each direction because calculation requirements are expanded according to Fourier functions, and the number of the points is the N power of 2; the coarse measurement may be 64, 128, strictly 512, more strictly 1024 or 2048. The detection is repeated 3 times to avoid errors in detection, such as dust on the probe. The more times, the more accurate.
In one embodiment, when the first data meets the preset requirement, clamping the simulation wheel hub to a second run-out testing machine for measurement and verification, and obtaining second data includes:
when the first data meet the preset requirements, the simulation wheel hub is clamped to the second jumping testing machine, the second jumping testing machine respectively measures circle jumping of the preset position of the simulation wheel hub in the radial direction and the axial direction, at least 64 points are measured in each direction, then the clamping is repeated at least 3 times, the clamping is detected every time, the detection data are subjected to preset analysis processing, and the second data are obtained.
At least 64 points are measured to meet the calculation requirement of the Fourier function; the clamping is repeated at least 3 times to avoid the influence of clamping errors.
The preset analysis processing includes not only the fourier transform described above but also statistical processing such as a line calculation standard deviation.
Through measurement after clamping for many times, the measurement accuracy of the second run-out testing machine can be verified, and the clamping reliability of the second run-out testing machine can also be verified.
The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Fig. 1 is a schematic view of a simulation hub for verifying a hub runout tester of a motor vehicle according to an embodiment of the present invention, and fig. 2 is a schematic view of a right side view of fig. 1, as shown in fig. 1 and 2, the simulation hub for verifying a hub runout tester of a motor vehicle includes an outer ring 11, an end plate 12 and a clamping portion 13, which are fixed to each other, the end plate 12 is located at one end of the outer ring 11, and the clamping portion 13 is detachably fixed to the end plate 12; the clamping part 13 comprises a first positioning hole 131 for positioning and clamping, the first positioning hole 131 is a cylindrical hole, and the first positioning hole 131 is used for being matched with a clamp of the motor vehicle hub run-out testing machine; the cylindricity of the first positioning hole 131 is smaller than a preset value, so that accurate positioning can be realized; the outer circumference of the outer ring 11 comprises two circles of measuring cylindrical surfaces 111 with preset axial length, the generatrix of each measuring cylindrical surface 111 is parallel to the axis of the first positioning hole 131, the circle run-out detection values of the measuring cylindrical surfaces 111 are preset second harmonic run-out values, namely the measuring cylindrical surfaces 111 are used for measuring circle run-out, the simulated hub is an unqualified product, the unqualified reason is an ellipse, and therefore the hub run-out testing machine for the motor vehicle can be verified.
In this embodiment, the outer ring 11 and the end plate 12 are integrally formed, so that the position accuracy of the two is higher, and the manufacturing cost is low.
In this embodiment, the clamping portion 13 further includes a boss 132 assembled with the end plate 12, the end plate 12 includes a second positioning hole 121 matched with the boss 132, and after the boss 132 is installed in the second positioning hole 121, the parallelism between the generatrix of the measurement cylindrical surface 111 and the axis of the first positioning hole 131 is smaller than a preset value, that is, requirements on the size, shape and position of the boss 132 and the second positioning hole 121 are provided. In this way, the mounting of the holder 13 and the end plate 12 is facilitated, and the positional relationship therebetween is more accurately positioned.
In this embodiment, two circles of the measuring cylindrical surfaces 111 are aligned at the outer ends in the radial direction, and the radial dimension of the outer circumference of the outer ring 11 between two circles of the measuring cylindrical surfaces 111 is smaller than that of the measuring cylindrical surfaces 111. Two circles of the measuring cylindrical surfaces 111 are aligned at the radial outer ends, namely the outer circular surfaces are equal in height on the horizontal plane, so that the measurement is convenient, and the circular runout detecting head is easier to arrange. The radial dimension of the outer circumference between the two circles of the measurement cylindrical surfaces 111 is smaller than that of the measurement cylindrical surfaces 111, and the abdication is performed, namely, the circular runout detection head is prevented from being touched to influence the measurement precision.
In this embodiment, the outer sides of the two circles of the measurement cylindrical surfaces 111 are both provided with the measurement vertical surface 112, and an included angle between the measurement vertical surface 112 and the measurement cylindrical surfaces 111 is 80 to 90 degrees, so that a radial measuring head for measuring radial circular runout and an axial measuring head for measuring axial circular runout can be conveniently placed at the same time. In this way, in addition to measuring radial circular run-out, also axial circular run-out, i.e. outer circular run-out, can be measured, i.e. end circular run-out.
In this embodiment, as shown in fig. 3, the clamping portion 13 further includes an end surface positioning surface 133 engaged with the jump testing machine, the end surface positioning surface 133 is located at one end of the clamping portion 13, and a perpendicularity between the end surface positioning surface 133 and an axis of the first positioning hole 131 is smaller than a preset value. On the basis of positioning through the first positioning hole 131, the end face positioning surface 133 is added, so that the positioning is more reliable.
In this embodiment, the clamping portion 13 further includes 5 threaded holes 134, an axial direction of the threaded holes 134 is the same as an axial direction of the first positioning holes 131, and the end plate 12 further includes screw through holes whose positions match the threaded holes 134; the fixing of the clamping portion 13 and the end plate 12 includes: after the boss 132 and the second positioning hole 121 are assembled, a screw 14 is inserted through the screw through hole and screwed into the threaded hole 134 for fixing. Thus, the fixing is simple and the assembly and disassembly are convenient.
In this embodiment, the end plate 12 is provided with a plurality of weight-reducing holes 123 uniformly distributed along the circumference, and the radial distance between the weight-reducing holes 123 and the measuring cylindrical surface 111 is greater than a preset value, so as to ensure the strength of the simulated hub. Therefore, the phenomenon that the simulated hub is too heavy and the load of the hub jump testing machine of the motor vehicle is increased is avoided, and the clamp is easy to loosen and the position is deviated due to too heavy weight.
Example two
Fig. 4 is a schematic diagram of a verification method of a wheel hub runout tester of a second vehicle according to an embodiment of the present invention, as shown in fig. 4, the method includes the following steps:
step 401: clamping the simulation hub to the first run-out testing machine, wherein the first run-out testing machine respectively measures circular run-out of a preset part of the simulation hub in the radial direction and the axial direction, and 512 points are measured in each direction to obtain 1 circular run-out value; here, the preset portions are a measurement cylindrical surface 111 and a measurement vertical surface 112;
step 402: repeating the step 401 for 10 times to obtain 10 circle run-out values, namely a first circle run-out value; because the measurement points are many and the detection is repeated, more accurate detection data can be obtained
Step 403: performing Fourier transform on the first circle run-out value to obtain a second circle run-out value after the clamping error of the simulated hub is removed; the clamping error is an error caused by inaccurate positioning in clamping;
step 404: carrying out statistical processing on the second circular runout value to obtain first data for simulating the fluctuation conditions of the circular runout values of the hub in the radial direction and the axial direction; specifically, the fluctuation condition is a sine curve, specifically, the analysis method is a runout harmonic analysis method, and the method is a common method for analyzing the circular runout of the wheel hub of the motor vehicle, and is not described in detail, and can be referred to a study of an aluminum alloy wheel hub runout tester calibration method in a paper of journal 2013 of engineering and experiment, namely, the paper;
step 405: when the first data meet preset requirements, clamping the simulated hub to the second run-out testing machine, wherein the second run-out testing machine respectively measures the circular run-out of the preset part of the simulated hub in the radial direction and the axial direction, and 512 points are measured in each direction to obtain 1 circular run-out value;
step 406: repeatedly clamping the simulated hub for 10 times, detecting in a step 405 mode after each clamping, and performing preset analysis processing on detection data to obtain second data; in the same step 404, the second data also reflects the fluctuation condition of the simulated hub circular runout and is a sine curve; here, through measuring after clamping many times, except can verifying the measurement accuracy of second run-out test machine, also can verify the clamping reliability of second run-out test machine.
Through the verification method, the simulated hub can accurately verify the run-out testing machine, is long in service life and cannot be confused with a common motor vehicle hub.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A simulation wheel hub for verification of a motor vehicle wheel hub jumping tester is characterized by comprising an outer circular ring, an end plate and a clamping part, wherein the outer circular ring, the end plate and the clamping part are fixed to each other; the clamping part comprises at least one first positioning hole for positioning and clamping, the first positioning hole is a cylindrical hole, and the cylindricity of the first positioning hole is smaller than a preset value; the outer circumference of the outer ring comprises two circles of measuring cylindrical surfaces with preset axial lengths, the generatrix of each measuring cylindrical surface is parallel to the axis of the first positioning hole, and the circle run-out detection values of the measuring cylindrical surfaces are preset second harmonic run-out values.
2. The simulated hub for verifying the hub pulsation testing machine of the motor vehicle as claimed in claim 1, wherein the clamping portion further comprises a boss assembled with the end plate, the end plate comprises a second positioning hole matched with the boss, and after the boss is assembled in the second positioning hole, the parallelism between the generatrix of the measuring cylindrical surface and the axis of the first positioning hole is smaller than a preset value.
3. The simulated hub for verification of hub pulsation testing machine of a motor vehicle according to claim 2, wherein two circles of said measuring cylindrical surfaces are aligned at the outer ends in the radial direction, and the outer circumference of said outer ring between said two circles of said measuring cylindrical surfaces has a smaller radial dimension than said measuring cylindrical surfaces.
4. The simulation hub for verifying the wheel hub pulsation testing machine of the motor vehicle according to claim 3, wherein the outer sides of the two circles of the measurement cylindrical surfaces are provided with measurement vertical surfaces, and the included angle between each measurement vertical surface and the measurement cylindrical surface is 80-90 degrees.
5. The simulated hub for verifying the hub pulsation testing machine of the motor vehicle as claimed in claim 4, wherein the clamping portion further comprises an end face positioning surface matched with the pulsation testing machine, the end face positioning surface is located at one end of the clamping portion, and the perpendicularity between the end face positioning surface and the axis of the first positioning hole is smaller than a preset value.
6. The simulated hub for verifying the hub pulsation testing machine of the motor vehicle as claimed in claim 1, wherein the clamping portion further comprises at least two threaded holes, the axial direction of the threaded holes is the same as the axial direction of the first positioning holes, and the end plate further comprises screw through holes matched with the threaded holes in position; the fixing of the clamping part and the end plate comprises: and after the boss and the second positioning hole are assembled, a screw penetrates through the screw through hole and is screwed into the threaded hole for fixing.
7. The simulated hub for verifying the hub pulsation testing machine of the motor vehicle as claimed in claim 6, wherein the end plate is provided with at least two weight-reducing holes which are uniformly distributed along the circumference, and the radial distance between the weight-reducing holes and the measuring cylindrical surface is larger than a preset value.
8. A method of verifying a motor vehicle hub runout tester, the method comprising:
clamping the simulated hub to a first run-out testing machine to measure circular run-out and perform data processing to obtain first data;
when the first data meet the preset requirements, clamping the simulation wheel hub to a second run-out testing machine for measurement and verification, and obtaining second data;
when the second data meet the preset requirement, determining that the measurement precision of the second jitter tester meets the first preset requirement, otherwise, determining that the measurement precision of the second jitter tester does not meet the first preset requirement; wherein,
the first jump testing machine accords with the jump testing machine of predetermineeing the second requirement for known measurement accuracy, the second jump testing machine is unknown measurement accuracy's jump testing machine.
9. The method of claim 8, wherein clamping the simulated hub to the first run-out tester measures circular run-out and processes the data to obtain first data, comprising:
clamping the simulation hub to the first run-out testing machine, wherein the first run-out testing machine respectively measures circular run-out of a preset part of the simulation hub in the radial direction and the axial direction, at least 64 points are measured in each direction, and the detection is repeated for at least 3 times to obtain a first circular run-out value;
performing Fourier transform on the first circle run-out value to obtain a second circle run-out value after the clamping error of the simulated hub is removed;
and carrying out preset statistical processing on the second circle run-out value to obtain first data for simulating the fluctuation conditions of the circle run-out values of the hub in the radial direction and the axial direction.
10. The method according to claim 8, wherein when the first data meet preset requirements, clamping the simulated hub to a second run-out testing machine for measurement verification, and obtaining second data comprises:
when the first data meet the preset requirements, the simulation wheel hub is clamped to the second jumping testing machine, the second jumping testing machine respectively measures circle jumping of the preset position of the simulation wheel hub in the radial direction and the axial direction, at least 64 points are measured in each direction, then the clamping is repeated at least 3 times, the clamping is detected every time, the detection data are subjected to preset analysis processing, and the second data are obtained.
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| CN201910146192.XA CN109764840B (en) | 2019-02-27 | 2019-02-27 | Simulation hub for verifying motor vehicle hub runout testing machine and verification method |
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Cited By (1)
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| CN113670195A (en) * | 2021-07-26 | 2021-11-19 | 中信戴卡股份有限公司 | Wheel hub is with circle detection and school shape device of beating |
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