CN116878737A - Hub dynamic balance detection method and detection device - Google Patents
Hub dynamic balance detection method and detection device Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 63
- 238000012545 processing Methods 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims abstract description 8
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining unbalance
- G01M1/16—Determining unbalance by oscillating or rotating the body to be tested
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/30—Compensating unbalance
- G01M1/34—Compensating unbalance by removing material from the body to be tested, e.g. from the tread of tyres
Abstract
The utility model relates to a hub dynamic balance detection method and a detection device, and relates to the technical field of hub detection, wherein the hub dynamic balance detection method comprises the steps of obtaining hub data, detecting, calculating eccentricity, calculating actual eccentricity, primary judging, secondary judging, estimating cutting quality and the like; the hub dynamic balance detection device comprises a frame, a hub, a driving mechanism, a detection mechanism and a processing system. According to the utility model, the unqualified wheel hub caused by the installation error in the wheel hub detection can be eliminated through calculation, so that the accuracy of wheel detection is improved, and the unqualified wheel hub probability caused by the installation error is further reduced.
Description
Technical Field
The utility model relates to the technical field of hub detection, in particular to a hub dynamic balance detection method and device.
Background
With the improvement of living standard, the automobile becomes a common riding instead of walking tool, the rapid increase of the demand for the number of automobiles also directly promotes the rapid development of automobile manufacturing industry, under the background, people have a larger pursuit on the quality of automobiles, an automobile hub is used as one of automobile accessories, the dynamic balance test of the automobile hub is an important step of automobile hub detection, and the hub dynamic balance detection is about whether the automobile is stable in running.
At present, the publication day is 2021, 12 months and 14 days, and the Chinese utility model patent with publication number CN215178365U proposes an automobile hub dynamic balance detection device, and it includes the box, the chamber door is installed to the terminal surface before the box, the box left end face is connected with the erection column, the control box is installed to the erection column upper end, install display screen and control panel on the control box, the box upper end is connected with the case lid, the pivot is installed in the rotation of box right-hand member, the detection dish is equipped with to pivot surface cover, detection dish right-hand member face is connected with side vibration telecommunication sensor.
When the dynamic balance detection is carried out, the hub is arranged on the rotating shaft through the nut, the rotating shaft rotates and drives the hub to rotate, the side edge and the peripheral surface of the hub are respectively contacted with the side vibration telecommunication sensor and the upper vibration telecommunication sensor in the rotating process, the dynamic balance information in the rotating process of the hub is detected through the side vibration telecommunication sensor and the upper vibration telecommunication sensor, and the dynamic balance test result of the hub is displayed through the display screen.
However, at present, when the automobile manufacturer produces the hub, a large number of dynamic balances of the hub are required to be detected, because the hub is assembled and disassembled on the rotating shaft for many times, the rotating shaft is worn, the diameter of the rotating shaft is reduced, when the hub is assembled on the rotating shaft, the gap between the rotating shaft and the threaded hole on the hub is enlarged, and when the assembled position of the center of the hub is not coaxial with the axis of the rotating shaft, the detection error of the dynamic balance of the hub is increased, and the accuracy of the dynamic balance detection of the hub is reduced.
Disclosure of Invention
The utility model provides a hub dynamic balance detection method and a detection system, which can improve the accuracy of hub dynamic balance detection.
In a first aspect, the utility model provides a method for detecting dynamic balance of a hub, which adopts the following technical scheme:
a method for detecting dynamic balance of a hub comprises the following steps:
acquiring hub data: obtaining the mass m of the hub and the radius r of the hub;
and (3) primary detection: the hub is arranged on a rotating shaft of the detecting instrument, the hub rotates through rotating the rotating shaft, and then centrifugal force F born by the rotating shaft, angular speed omega rotated by the rotating shaft, maximum distance D between the peripheral surface of the hub and the rotating shaft and minimum distance D between the peripheral surface of the hub and the rotating shaft are measured;
eccentricity calculation: the calculation model for calculating the distance e between the center of mass of the hub and the axle center of the hub is as follows:
；
wherein L is the distance between the mounting point and the center of the hub, R is the distance between the center of gravity of the hub and the mounting point, and alpha is the included angle between the direction of centrifugal force F and the direction of the mounting point towards the center of the hub;
wherein, the calculation model of L and R is as follows:
；
；
actual eccentric force calculation: calculating the actual eccentric force F of the hub 2 ，F 2 The calculation model of (2) is as follows:
；
and (3) primary judgment: setting a first threshold F of centrifugal force when the qualified hub rotates m1 If F 2 Less than or equal to F m1 If F, judging that the hub production is qualified 2 Greater than F m1 And judging that the hub production is not qualified.
After the hub is produced, the hub needs to be detected, when the hub is mounted on the rotating shaft, the bolts and nuts on the rotating shaft can be worn due to long-time disassembly, so that mounting errors are generated when the hub is detected; through adopting above-mentioned technical scheme, the inspector measures the radius of wheel hub through the slide caliper rule to weigh the quality of wheel hub, perhaps directly obtain wheel hub radius and quality information through the data information on the wheel hub, with the radius and the quality data input system of wheel hub, centrifugal force first threshold F when rotating qualified wheel hub simultaneously m1 The input system obtains the maximum distance D between the outer peripheral surface of the hub and the rotating shaft and the minimum distance D between the outer peripheral surface of the hub and the rotating shaft, calculates the distance L between the mounting point and the center of the hub, calculates the distance R between the center of gravity of the hub and the mounting point by displaying the actual centripetal force F of the detected hub on a display, detects the stress direction of the rotating shaft and the included angle alpha between the stress direction of the rotating shaft and the mounting point and the center of the hub by a sensor on the rotating shaft, determines the eccentric direction of the hub, calculates the distance eccentric distance e between the center of gravity of the hub and the center of the hub, and calculates the centrifugal force F when the center of the hub is arranged on the rotating shaft by the eccentric distance e 2 F is to F 2 And F is equal to m1 Comparing if F 2 Less than or equal to F m1 If F, judging that the hub production is qualified 2 Greater than F m1 Judging that the hub production is unqualified; through the detection of the steps, the condition that the hub is unqualified due to the installation error during hub detection is eliminated, and the centrifugal force F of the hub during rotation is obtained according to the calculated eccentricity of the hub 2 And a first threshold F of centrifugal force when the qualified hub rotates is set m1 And comparing to judge whether the production of the hub is qualified or not, and because the installation error of workers during the installation of the hub is eliminated when the hub is detected, the detection precision of the hub is improved, and the probability of the hub failure caused by the installation error is reduced.
Optionally, the method further comprises a secondary judgment step, wherein F m1 <F 2 Executing secondary judgment when the first judgment is performed;
and (3) secondary judgment: setting a centrifugal force second threshold F when the hub rotates m2 If F 2 ≤F m2 Judging the hub as defective, if F 2 >F m2 And judging the hub as waste.
Through adopting above-mentioned technical scheme, through the judgement of secondary judgement step, can confirm whether wheel hub has the prosthetic necessity to reduce the quantity of wheel hub report waste product, and then reduce the loss of wheel hub production material.
Optionally, after the secondary judging step, a step of estimating the excision quality is further provided;
estimating the ablation quality: according to the direction of the eccentricity measured in the primary detection step, punching is performed at a length N from the center of the hub along the direction of the eccentricity, and the mass removed by punching on the hub is set to be m 1 The mass removed by punching on the hub is m 1 The estimation model of (2) is as follows:
。
through adopting above-mentioned technical scheme, when excision is directly fallen and is calculated for the pivot receives the power for zero on being the plane, according to the eccentric direction that detects in the initial detection step, is N apart from the wheel hub center length department punching along eccentric direction, makes the wheel hub quality of deflection focus one side reduce, and then makes wheel hub centrobaric position be close to wheel hub center, and then improves wheel hub's utilization ratio, and then reduces wheel hub production material's loss.
Optionally, after the excision quality is estimated, an excision step, a secondary detection step and a tertiary judgment step are further provided;
a cutting step; drilling a hole in the hub so that the mass removed from the hub is m 1 ；
And (3) secondary detection: when the hub is repaired through the step of estimating the excision quality, repeating the steps of obtaining hub data, primary detection, calculating the eccentricity and calculating the actual eccentricity;
three judging steps: if F 2 Less than or equal to F m1 Judging the hub as qualified in production, if F 2 Greater than F m1 And judging that the hub is unqualified in production.
By adopting the technical scheme, when the hub cutting mass is m 1 After that, F is detected in the secondary detection step 2 Less than or equal to F m1 Judging that the hub production is qualified, and if the F is detected in the secondary detection step 2 Greater than F m1 And judging that the hub production is not qualified.
In a second aspect, the utility model provides a hub dynamic balance detection device, which adopts the following technical scheme:
the utility model provides a wheel hub dynamic balance detection device, includes frame, distance sensor, tension sensor actuating mechanism, processing system and guiding mechanism, actuating mechanism sets up in the frame, actuating mechanism is used for driving the wheel hub rotation, distance sensor passes through guiding mechanism activity and sets up in the frame, tension sensor sets up on actuating mechanism's output, processing system includes central processing unit and display, the output of distance sensor and tension sensor all is connected with central processing unit's input signal of telecommunication, central processing unit's output with the display is connected.
By adopting the technical scheme, when the hub is detected, a worker measures the radius information of the hub through a caliper and obtains the weight information of the hub through weighing, or directly reads the weight and the radius information of the hub through information on the hub, inputs the weight and the radius information of the hub into a central processing unit, inputs the centrifugal force threshold range of the qualified hub into the central processing unit, then fixes the hub on a driving mechanism, drives the hub to rotate, monitors the maximum distance and the minimum distance between the peripheral surface of the hub and the distance sensor when the hub rotates, transmits the maximum distance and the minimum distance information to the central processing unit, monitors the centrifugal force of the hub on the driving mechanism and the direction information of the centrifugal force, and transmits the information to the central processing unit, and the central processing unit calculates the position of a mounting point of the hub, the gravity center position of the hub and the actual eccentric force of the hub; the central processing unit compares the actual eccentric force of the hub with a first centrifugal force threshold value when the qualified hub rotates, when the actual eccentric force of the hub is smaller than or equal to the first centrifugal force threshold value when the qualified hub rotates, the hub is judged to be a qualified product, when the actual eccentric force of the hub is larger than the first centrifugal force threshold value when the qualified hub rotates, the actual eccentric force of the central processing unit compares the actual eccentric force of the hub with a second threshold value, when the actual eccentric force of the hub is smaller than the second threshold value, the hub is judged to be a defective product, when the actual eccentric force of the hub is smaller than the second threshold value, the hub is judged to be a waste product, and the display displays the result calculated by the central processing unit; the central processing unit judges whether the hub has the repairing necessity or not, so that the number of waste products of the hub is reduced, and the loss of hub production materials is further reduced.
Optionally, actuating mechanism includes driving motor, transmission case, pivot and coupling assembling, driving motor and transmission case all set up in the frame, driving motor's input with the input transmission of transmission case is connected, the coaxial fixed connection of pivot is on the output shaft of transmission case, tension sensor sets up on the one end that the transmission case was kept away from in the pivot, coupling assembling is used for connecting wheel hub on tension sensor.
Through adopting above-mentioned technical scheme, with wheel hub through coupling assembling connection on tension sensor, with tension sensor connection in the pivot, driving motor drives the transmission case and rotates, and the transmission case drives the pivot and rotates, and the pivot drives wheel hub and rotates, and tension sensor detects wheel hub and rotates the centrifugal force of wheel hub to the pivot.
Optionally, the coupling assembling includes fixed disk, screw thread post and nut, the fixed disk sets up on tension sensor, the screw thread post sets up on the fixed disk, the screw thread post is provided with a plurality ofly, nut threaded connection is on the screw thread post.
Through adopting above-mentioned technical scheme, place wheel hub on the fixed disk for in the screw hole of screw thread post on wheel hub worn to establish, with nut threaded connection on the screw thread post, make wheel hub fix on the fixed disk.
Optionally, the adjustment mechanism includes an electric push cylinder and a rotating assembly, the rotating assembly is arranged on the frame, the electric push cylinder is arranged on the rotating assembly, and the distance sensor is arranged on the output end of the electric push cylinder.
Through adopting above-mentioned technical scheme, when the wheel hub width that is detected is different, drive distance sensor through the output shaft of electricity push away the jar and go up and down for distance sensor removes to different heights, and then makes distance sensor can adapt to the global and distance between the distance sensor of wheel hub to different width and measure.
Optionally, the rotating assembly includes gear motor and rotary disk, gear motor sets up in the frame, rotary disk coaxial coupling is on gear motor's output shaft, the electricity pushes away the jar setting on the rotary disk.
Through adopting above-mentioned technical scheme, when the transmission point of distance sensor and the non-correspondence of pivot, drive the rotary disk through gear motor and rotate for distance sensor's axle center department that can shine the pivot, and then make distance sensor measuring distance more accurate.
In summary, the present utility model includes at least one of the following beneficial technical effects:
1. the condition that the hub is unqualified due to the installation error during hub detection is eliminated through calculation, according to the meterCalculating the eccentricity of the hub to obtain the centrifugal force F of the hub during rotation 2 And a first threshold F of centrifugal force when the qualified hub rotates is set m1 And comparing to judge whether the production of the hub is qualified or not, and because the installation error of workers during the installation of the hub is eliminated when the hub is detected, the detection precision of the hub is improved, and the probability of the hub failure caused by the installation error is reduced.
2. Through the judgment of the secondary judgment step, whether the hub has the repairing necessity can be determined, so that the number of waste products of the hub is reduced, and the loss of hub production materials is further reduced.
3. Whether the wheel hub has restoration necessity is detected, the wheel hub is subjected to gravity center correction, the utilization rate of the wheel hub is improved, and the loss of production materials of the wheel hub is reduced.
Drawings
FIG. 1 is a flow chart of embodiment 1 of the present utility model;
FIG. 2 is a schematic overall structure of embodiment 2 of the present utility model;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a logic diagram of a processing system according to embodiment 2 of the present utility model.
Reference numerals: 100. a frame; 200. a driving mechanism; 210. a driving motor; 220. a transmission case; 230. a rotating shaft; 240. a connection assembly; 241. a fixed plate; 242. a threaded column; 243. a nut; 300. a detection mechanism; 310. a tension sensor; 320. a distance sensor; 400. a display; 500. an adjusting mechanism; 510. an electric pushing cylinder; 520. a rotating assembly; 521. a speed reducing motor; 522. and (5) rotating the disc.
Detailed Description
The utility model is described in further detail below in connection with fig. 1 to 4.
Example 1: the embodiment discloses a hub dynamic balance detection method, referring to fig. 1, the hub dynamic balance detection method comprises the following steps:
s1: acquiring hub data: obtaining the mass m of the hub and the radius r of the hub;
s2: and (3) detection: the hub is arranged on a rotating shaft of the detecting instrument, the hub rotates through rotating the rotating shaft, and then centrifugal force F born by the rotating shaft, angular speed omega rotated by the rotating shaft, maximum distance D between the peripheral surface of the hub and the rotating shaft and minimum distance D between the peripheral surface of the hub and the rotating shaft are measured;
s3: eccentricity calculation: the calculation model for calculating the distance e between the center of mass of the hub and the axle center of the hub is as follows:
；
wherein L is the distance between the mounting point and the center of the hub, R is the distance between the center of gravity of the hub and the mounting point, and alpha is the included angle between the direction of centrifugal force F and the direction of the mounting point towards the center of the hub;
wherein, the calculation model of L and R is as follows:
；
；
s4: actual eccentric force calculation: calculating the actual eccentric force F of the hub 2 ，F 2 The calculation model of (2) is as follows:
；
s5: and (3) primary judgment: setting a first threshold F of centrifugal force when the qualified hub rotates m1 If F 2 Less than or equal to F m1 If F, judging that the hub production is qualified 2 Greater than F m1 S6, executing the step;
s6: and (3) secondary judgment: setting a centrifugal force second threshold F when the hub rotates m2 If F 2 ≤F m2 Step S7 is executed if F 2 >F m2 Judging the hub as a waste product;
s7: estimating the excision quality: punching a hole at a length N from the center of the hub along the direction of the eccentricity according to the direction of the eccentricity measured in the detecting step, providingThe mass removed by punching on the hub is m 1 The mass removed by punching on the hub is m 1 The estimation model of (2) is as follows:
the method comprises the steps of carrying out a first treatment on the surface of the Wherein e<<N；
S8: a cutting step; drilling a hole in the hub so that the mass removed from the hub is m 1 ；
S9: and (3) secondary detection: when the hub is repaired through the step of estimating the excision quality, repeating the steps of obtaining hub data, primary detection, calculating the eccentricity and calculating the actual eccentricity;
s10: and (3) three times of judgment: if F 2 Less than or equal to F m1 Judging the hub as qualified in production, if F 2 Greater than F m1 And judging that the hub is unqualified in production.
The implementation principle of the method for detecting the dynamic balance of the hub is as follows:
the method comprises the steps that a inspector measures the radius of a hub through a caliper, weighs the mass of the hub, inputs the radius and the mass of the hub into a system, or directly obtains the radius and the mass of the hub through data information on the hub, and simultaneously rotates a qualified hub by a centrifugal force first threshold F m1 A second threshold F m2 The input system is used for measuring the maximum distance D between the peripheral surface and the rotating shaft and the minimum distance D between the peripheral surface and the rotating shaft of the hub through the sensor, calculating the distance L between the mounting point and the hub center, displaying the actual centripetal force F of the detected hub on the display, calculating the distance R between the hub center of gravity and the mounting point, detecting the stress direction of the rotating shaft and the included angle alpha between the stress direction of the rotating shaft and the mounting point and the hub center through the sensor on the rotating shaft, determining the eccentric direction of the hub, calculating the distance eccentric distance e between the hub center of gravity and the hub center, and calculating the centrifugal force F when the hub center is arranged on the rotating shaft through the eccentric distance e 2 F is to F 2 And F is equal to m1 Comparing if F 2 Less than or equal to F m1 If F, judging that the hub production is qualified m1 <F 2 ≤F m2 If F, judging the hub as defective 2 >F m2 Judging the hub as waste, when F m1 <F 2 ≤F m2 Repairing the hub, punching a hole at a length of N from the center of the hub along the eccentric direction according to the eccentric direction measured in the detection step, wherein the removed mass of the hub is m 1 The mass of the hub which is deviated to one side of the gravity center is reduced, and the position of the gravity center of the hub is close to the center of the hub; when the hub is repaired through the step of estimating the excision quality, repeating the steps of obtaining hub data, primary detection, calculating the eccentricity, calculating the actual eccentricity and primary judgment; if F 2 Less than or equal to F m1 If F, judging that the hub production is qualified 2 Greater than F m1 Judging that the hub production is unqualified; the hub disqualification caused by the installation error during hub detection is eliminated through calculation, and the centrifugal force F of the hub during rotation is obtained according to the calculated eccentricity of the hub 2 And a first threshold F of centrifugal force when the qualified hub rotates is set m1 And comparing to judge whether the production of the hub is qualified or not, and because the installation error of workers during the installation of the hub is eliminated when the hub is detected, the detection precision of the hub is improved, and the probability of the hub failure caused by the installation error is reduced.
Example 2: the embodiment discloses a wheel hub dynamic balance detection device, refer to fig. 2 through 4, a wheel hub dynamic balance detection device includes frame 100, distance sensor 320, tension sensor 310 actuating mechanism 200, processing system and guiding mechanism 500, actuating mechanism 200 sets up on frame 100, actuating mechanism 200 is used for driving the wheel hub rotation, distance sensor 320 passes through guiding mechanism 500 activity setting on frame 100, tension sensor 310 sets up on actuating mechanism 200's output, processing system includes central processing unit and display 400, distance sensor 320 and tension sensor 310's output all are connected with central processing unit's input electrical signal, central processing unit's output with display 400 is connected.
Referring to fig. 2-4, the driving mechanism 200 includes a driving motor 210, a transmission case 220, a rotating shaft 230, and a connection assembly 240, the connection assembly 240 includes a fixing plate 241, a threaded post 242, and a nut 243, the driving motor 210 and the transmission case 220 are all connected to the frame 100 through bolts, an input end of the driving motor 210 is in driving connection with an input end of the transmission case 220, the rotating shaft 230 is coaxially and fixedly connected to an output shaft of the transmission case 220, the fixing plate 241 is connected to an end, far away from the transmission case 220, of the rotating shaft 230 through bolts, the threaded post 242 is fixedly connected to the fixing plate 241, the threaded post 242 is provided with a plurality of hubs, and the hubs are connected to the threaded post 242 through nuts 243.
The hub is placed on the fixed disc 241, the threaded column 242 is penetrated into a threaded hole on the hub, the nut 243 is connected to the threaded column 242 in a threaded manner, the hub is fixed on the fixed disc 241, the tension sensor 310 is connected to the rotating shaft 230, the driving motor 210 drives the transmission case 220 to rotate, the transmission case 220 drives the rotating shaft 230 to rotate, and the rotating shaft 230 drives the hub to rotate.
Referring to fig. 2, the adjusting mechanism 500 includes an electric push cylinder 510 and a rotating assembly 520, the rotating assembly 520 includes a gear motor 521 and a rotating disk 522, the gear motor 521 is disposed on the frame 100, the rotating disk 522 is coaxially connected to an output shaft of the gear motor 521, the electric push cylinder 510 is disposed on the rotating disk 522, and the distance sensor 320 is disposed on an output end of the electric push cylinder 510.
When the detected hub widths are different, the output shaft of the electric push cylinder 510 drives the distance sensor 320 to lift, so that the distance sensor 320 moves to different heights, and the distance sensor 320 can adapt to measuring the distances between the peripheral surfaces of hubs with different widths and the distance sensor 320. When the emission point of the distance sensor 320 does not correspond to the rotation shaft 230, the rotation disk 522 is driven to rotate by the gear motor 521, so that the distance sensor 320 can irradiate the axis of the rotation shaft 230, and the distance measured by the distance sensor 320 is more accurate.
The implementation principle of the wheel hub dynamic balance detection device in the embodiment is as follows:
the workman places the wheel hub on fixed disk 241 for screw thread post 242 wears to establish in the screw hole on the wheel hub, with nut 243 threaded connection on screw thread post 242, makes the wheel hub fix on fixed disk 241, connects tension sensor 310 on pivot 230, and driving motor 210 drives the transmission case 220 and rotates, and transmission case 220 drives pivot 230 and pivot 230 drives the wheel hub and rotate. Then, a worker measures radius information of the hub through a caliper and obtains hub weight information through weighing, or directly reads the hub weight and the radius information through information on the hub, inputs the hub weight and the radius information into a central processing unit, inputs a centrifugal force threshold range of a qualified hub into the central processing unit, then fixes the hub on a driving mechanism, drives the hub to rotate, monitors the maximum distance and the minimum distance between the peripheral surface of the hub and the distance sensor when the hub rotates, and transmits the maximum distance and the minimum distance information to the central processing unit, monitors the centrifugal force of the hub on the driving mechanism and the direction information of the centrifugal force, and transmits the information to the central processing unit, and the central processing unit calculates the position of a hub mounting point, the gravity center position of the hub and the actual eccentric force of the hub; the central processing unit compares the actual eccentric force of the hub with a first centrifugal force threshold value when the qualified hub rotates, when the actual eccentric force of the hub is smaller than or equal to the first centrifugal force threshold value when the qualified hub rotates, the hub is judged to be a qualified product, when the actual eccentric force of the hub is larger than the first centrifugal force threshold value when the qualified hub rotates, the central processing unit compares the actual eccentric force of the hub with a second threshold value, when the actual eccentric force of the hub is smaller than the second threshold value, the hub is judged to be a defective product, when the actual eccentric force of the hub is smaller than the second threshold value, the hub is judged to be a waste product, and the display displays the result calculated by the central processing unit; the central processing unit judges whether the hub has the repairing necessity or not, so that the number of waste products of the hub is reduced, and the loss of hub production materials is further reduced; when the detected hub widths are different, the output shaft of the electric push cylinder 510 drives the distance sensor 320 to lift, so that the distance sensor 320 moves to different heights, and the distance sensor 320 can adapt to measuring the distances between the peripheral surfaces of hubs with different widths and the distance sensor 320. When the emission point of the distance sensor 320 does not correspond to the rotation shaft 230, the rotation disk 522 is driven to rotate by the gear motor 521, so that the distance sensor 320 can irradiate the axis of the rotation shaft 230, and the distance measured by the distance sensor 320 is more accurate.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (9)
1. A method for detecting dynamic balance of a hub is characterized by comprising the following steps of: the method comprises the following steps:
acquiring hub data: obtaining the mass m of the hub and the radius r of the hub;
and (3) detection: the hub is arranged on a rotating shaft of the detecting instrument, the hub rotates through rotating the rotating shaft, and then centrifugal force F born by the rotating shaft, angular speed omega rotated by the rotating shaft, maximum distance D between the peripheral surface of the hub and the rotating shaft and minimum distance D between the peripheral surface of the hub and the rotating shaft are measured;
eccentricity calculation: the calculation model for calculating the distance e between the center of mass of the hub and the axle center of the hub is as follows:
；
wherein L is the distance between the mounting point and the center of the hub, R is the distance between the center of gravity of the hub and the mounting point, and alpha is the included angle between the direction of centrifugal force F and the direction of the mounting point towards the center of the hub;
wherein, the calculation model of L and R is as follows:
；
；
actual eccentric force calculation: calculating the actual eccentric force F of the hub 2 ，F 2 The calculation model of (2) is as follows:
；
and (3) primary judgment: setting a first threshold F of centrifugal force when the qualified hub rotates m1 If F 2 Less than or equal to F m1 If F, judging that the hub production is qualified 2 Greater than F m1 And judging that the hub production is not qualified.
2. The method for detecting dynamic balance of a hub according to claim 1, wherein the method comprises the steps of: also comprises a secondary judging step, F in the primary judging step m1 <F 2 Executing secondary judgment when the first judgment is performed;
and (3) secondary judgment: setting a centrifugal force second threshold F when the hub rotates m2 If F 2 ≤F m2 Judging the hub as defective, if F 2 >F m2 And judging the hub as waste.
3. The method for detecting dynamic balance of a hub according to claim 2, wherein: after the secondary judging step, a step of estimating the cutting quality is further arranged;
estimating the ablation quality: according to the direction of the eccentricity measured in the detection step, punching is performed along the direction of the eccentricity at a length of N from the center of the hub, and the mass removed by punching on the hub is set to be m 1 The mass removed by punching on the hub is m 1 The estimation model of (2) is as follows:
。
4. a method for detecting dynamic balance of a hub according to claim 3, wherein: after the cutting quality is estimated, a cutting step, a secondary detection step and a tertiary judgment step are further arranged;
a cutting step; drilling a hole in the hub so that the mass removed from the hub is m 1 ；
And (3) secondary detection: when the hub is repaired through the step of estimating the excision quality, repeating the steps of obtaining hub data, primary detection, calculating the eccentricity and calculating the actual eccentricity;
three judging steps: if F 2 Less than or equal to F m1 Judging the hub as qualified in production, if F 2 Greater than F m1 And judging that the hub is unqualified in production.
5. The utility model provides a wheel hub dynamic balance detection device which characterized in that: including frame (100), distance sensor (320), tension sensor (310), actuating mechanism (200), processing system and guiding mechanism (500), actuating mechanism (200) set up on frame (100), actuating mechanism (200) are used for driving the hub rotation, distance sensor (320) set up on frame (100) through guiding mechanism (500) activity, tension sensor (310) set up on the output of actuating mechanism (200), processing system includes central processing unit and display (400), the output of distance sensor (320) and tension sensor (310) all is connected with central processing unit's input electrical signal, central processing unit's output with display (400) are connected.
6. The hub dynamic balance detection device according to claim 5, wherein: the driving mechanism (200) comprises a driving motor (210), a transmission box (220), a rotating shaft (230) and a connecting component (240), wherein the driving motor (210) and the transmission box (220) are arranged on the frame (100), the input end of the driving motor (210) is in transmission connection with the input end of the transmission box (220), the rotating shaft (230) is coaxially and fixedly connected to an output shaft of the transmission box (220), the tension sensor (310) is arranged at one end, far away from the transmission box (220), of the rotating shaft (230), and the connecting component (240) is used for connecting a hub to the tension sensor (310).
7. The hub dynamic balance detection device according to claim 6, wherein: the connecting assembly (240) comprises a fixed disc (241), a threaded column (242) and nuts (243), wherein the fixed disc (241) is arranged on the tension sensor (310), the threaded column (242) is arranged on the fixed disc (241), the threaded column (242) is provided with a plurality of threaded columns, and the nuts (243) are in threaded connection with the threaded column (242).
8. A hub dynamic balance detection apparatus according to any one of claims 5-7, wherein: the adjusting mechanism (500) comprises an electric pushing cylinder (510) and a rotating assembly (520), the rotating assembly (520) is arranged on the frame (100), the electric pushing cylinder (510) is arranged on the rotating assembly (520), and the distance sensor (320) is arranged on the output end of the electric pushing cylinder (510).
9. The hub dynamic balance detection device according to claim 8, wherein: the rotating assembly (520) comprises a speed reducing motor (521) and a rotating disk (522), the speed reducing motor (521) is arranged on the frame (100), the rotating disk (522) is coaxially connected to an output shaft of the speed reducing motor (521), and the electric push cylinder (510) is arranged on the rotating disk (522).
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Cited By (1)
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|---|---|---|---|---|
| CN117824923A (en) * | 2024-02-29 | 2024-04-05 | 武汉成华汽车饰件有限公司 | Dynamic balance process and welding equipment for automobile steel hub |
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