CN107228744B - A kind of device and method of wheel hub air-leakage test - Google Patents

A kind of device and method of wheel hub air-leakage test Download PDF

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Publication number
CN107228744B
CN107228744B CN201710660146.2A CN201710660146A CN107228744B CN 107228744 B CN107228744 B CN 107228744B CN 201710660146 A CN201710660146 A CN 201710660146A CN 107228744 B CN107228744 B CN 107228744B
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CN
China
Prior art keywords
briquetting
wheel hub
air
charge
pressure
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CN201710660146.2A
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Chinese (zh)
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CN107228744A (en
Inventor
刘志豪
胡宗祥
楼淑华
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浙江奥通铝轮有限公司
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Publication of CN107228744A publication Critical patent/CN107228744A/en
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Publication of CN107228744B publication Critical patent/CN107228744B/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3236Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
    • G01M3/3263Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a differential pressure detector
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/40Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges

Abstract

The invention discloses a kind of device and method of wheel hub air-leakage test, including rack, power supply, gas source, conveying mechanism, sealing pressing mechanism and charge detection mechanism are provided in rack;Sealing pressing mechanism includes the first briquetting, shaft is fixedly connected on first briquetting, shaft is rotatablely connected on the rack, turntable and stepper motor are additionally provided in rack, turntable is driven by stepper motor to be rotated, cylinder is fixedly connected on turntable, the second briquetting is fixedly connected on cylinder, first briquetting and the second briquetting are equipped with, first briquetting is provided with gas tube and the first spray point close to the side of the second briquetting, gas tube is connected to gas source, second briquetting is provided with the second spray point close to the side of the first briquetting, first spray point is electrically connected to one of electrode of power supply, second spray point is electrically connected to another electrode of power supply.The present invention can carry out high-precision detection to the air-tightness of wheel hub, and the cost detected compared with prior art is lower.

Description

A kind of device and method of wheel hub air-leakage test

Technical field

The present invention relates to the equipment and side of automotive parts manufacturing technology more particularly to a kind of wheel hub air-leakage test Method.

Background technique

With flourishing for automobile industry, the aluminium alloy wheel hub part indispensable as automobile has wide city Field prospect.But come since aluminium alloy wheel hub is cast out, it is possible that sand holes, these sand holes are with the naked eye in casting process It is difficult to find out, if there are sand holes on wheel hub, be just easy to gas leakage after loading onto tire, automobile is to run at high speed, and just has safety hidden Suffer from, it is therefore desirable to which quality safety detection is carried out to aluminium alloy wheel hub.

The aluminium alloy wheel hub air-tightness detection method being widely used both at home and abroad at present has wet type air-leakage test method and helium Air-leakage test method.Wet type air-leakage test method is that whether have bubble generation by manual identified, and this method efficiency is relatively low, no Conducive to realization automatic detection, while wet type air-tightness detection method is higher to staff's Capability Requirement, for continuous obvious The generation of bubble easily determines that there are sand holes on aluminium wheels surface, but the bubble that small sand holes generate is difficult to area with interference bubble Point, then it is easy to appear erroneous judgement, causes detection accuracy low.It is needed when being detected using helium using inert gas-helium and helium mass spectrum Instrument, helium is needed for wheel hub to be placed in confined space, be vacuumized to hub inner lumen when detecting, right when vacuum values are sufficiently small The helium of certain pressure value is filled on the outside of wheel hub, if wheel hub wheel rim, there are leak source, helium gas molecules can pass through leak source, reach wheel hub Inner cavity;Since hub inner lumen is vacuum environment, the helium gas molecules of entrance can be pumped in helium mass analyzer, be detected by helium mass analyzer Helium molecular number out, therefore, it is determined that within an acceptable range whether the air-tightness of wheel hub.Although the precision of this detection method detection It is higher compared to bubble method, but helium air-leakage test method has the disadvantage in that 1, helium air-leakage test method is adopted in use Detection device is expensive, and in the detection, the loss of helium is also bigger, and helium is as rare gas, expensive, therefore Overall testing cost is high;2, inherently there is certain density helium in air, if misoperation in operation, it is easy to detect Helium into air causes the detection of air-tightness inaccurate;3, when detecting each wheel hub, it is also necessary to which entire wheel hub is close It is enclosed among the sealing space of vacuum, the operation that will lead to detection in this way is more complicated, and the working efficiency of detection is relatively low.

Therefore, it is badly in need of that a kind of detection accuracy is high, detection is easy to operate now, work efficiency is high, and testing cost is lower The device and method of new wheel hub air-leakage test.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of device and method of wheel hub air-leakage test, it can be to wheel hub Air-tightness carry out high-precision detection, the cost detected compared with prior art is lower, and also detect it is easy to operate, detection Work efficiency is high.

The present invention solves above-mentioned technical problem by following technological means:

A kind of equipment of wheel hub air-leakage test, including rack are provided with power supply, gas source, conveying mechanism, sealing in rack One end of conveying mechanism is arranged in pressing mechanism and charge detection mechanism, sealing pressing mechanism, and charge detection mechanism is arranged close Seal the side of pressing mechanism;Sealing pressing mechanism includes the first briquetting, and shaft is fixedly connected on the first briquetting, and shaft rotation connects It connects on the rack, turntable and stepper motor is additionally provided in rack, turntable is driven by stepper motor to be rotated, and is fixedly connected on turntable There is cylinder, the second briquetting is fixedly connected on cylinder, the first briquetting and the second briquetting are equipped with, and the first briquetting is close to the second pressure The side of block is provided with gas tube and the first spray point, and gas tube is connected to gas source, and the second briquetting is close to the side of the first briquetting It is provided with the second spray point, the needle point of the first spray point and the second spray point is in a straight line, the electrical connection of the first spray point In one of electrode of power supply, the second spray point is electrically connected to another electrode of power supply, the charge detection mechanism installation In the side of the second briquetting.

Further, charge detection mechanism includes negative-pressure air fan, the rim clearance cooperation of negative-pressure air fan and wheel hub, negative-pressure air fan Side far from wheel rim is provided with charge amplifier, and connecting tube, charge amplification are communicated between charge amplifier and negative-pressure air fan Charge tester is provided on device.

Further, it is additionally provided with bleeder pipe on first briquetting, the first solenoid valve is provided on the bleeder pipe.When right After wheel hub detection finishes, the first solenoid valve opens bleeder pipe, and the gas in hub inner lumen can be released by bleeder pipe.

Further, motor switch is electrically connected between the power supply and the first spray point, between the gas source and gas tube It is connected with second solenoid valve, the motor switch, the first solenoid valve, second solenoid valve, stepper motor, cylinder and negative-pressure air fan are equal It is connected with the same controller.Controller can be started by sequence according to the program being previously set motor switch, the first solenoid valve, Second solenoid valve, stepper motor, cylinder and negative-pressure air fan so that the present apparatus to wheel hub carry out air-leakage test when more from Dynamicization and intelligence, more saving labour.

Further, first briquetting is provided with pressure sensor, the pressure sensor close to the side of the second briquetting It is electrically connected with the controller.When gas source, which is inflated by gas tube into wheel hub, reaches preset pressure value, pressure sensor When sensing upper pressure limit value, signal is passed into controller, controller issues signal-off second solenoid valve, whole process intelligence Energyization control, will not cause danger because of operation error.

Further, the conveying mechanism includes conveyer belt and several rollers, and the conveying belt tension is on roller.Roller turns Wheel hub is transported close to one end of the first briquetting and the second briquetting by conveyer belt, reaches end by dynamic driving conveying belt transmission When, wheel hub is entered under the action of inertia force on the second briquetting.

Further, the charge tester, which powers on, is connected with alarm.When charge tester is detected with charge Gas when reaching acceptable definite value, alarm issues alarm, the air-tightness for the wheel hub for reminding staff detecting It does not reach requirement, is handled by the wheel hub that staff does not reach requirement air-tightness.

Further, rolling bearing is lined at the rotation connection of the shaft and rack.The setting of rolling bearing is so that turn For axis when relatively rotating with rack, frictional force and noise are smaller, extend the service life of shaft.

Further, electronic pressure gauge is also communicated on the bleeder pipe.In the detection process of air-tightness, if charge measures Examination instrument damages and staff does not have found, also continues the missing inspection that will lead to wheel hub with charge tester detection air-tightness, In this way, the wheel hub of gas leakage, which uses, will cause serious consequence on automobile, so when detecting, staff can also pass through sight Examine electronic pressure gauge whether pressure drop come judge wheel hub whether gas leakage, reach the dual fail-safe purpose of air-leakage test.

A kind of method of wheel hub air-leakage test: the following steps are included:

A: wheel hub is transported to close to one end of the first briquetting and the second briquetting using conveyer belt, and by wheel hub movement Inertia enters between the first briquetting and the second briquetting;

B: controller control starting cylinder, the telescopic rod elongation of cylinder push the second briquetting and with runner hub to close to the The direction of one briquetting moves, and the inner cavity of wheel hub is compressed sealing using the first briquetting and the second briquetting;

C: after wheel hub compresses sealing, second solenoid valve is opened in controller control, passes through gas tube to hub inner lumen from gas source In be filled with air, when pressure threshold, pressure sensor issues signal, signal is passed to controller, controller issues Signal-off second solenoid valve;

D: motor switch is opened in controller control, using the first spray point and the second electric discharge needle-discharging, to hub inner lumen Air ionization has charge after the air ionization of hub inner lumen;

E: controller controls stepper motor and drives turntable rotation, thus rotated with runner hub, if wheel hub air-tightness is bad, wheel The electrically charged air of hub inner cavity will be escaped from the wheel rim of wheel hub, be drawn in charge amplifier by negative-pressure air fan, by electricity Lotus amplifier to charge signal amplify, then reach charge tester, by charge tester detect charged particle and by Alarm sounds an alarm, and the electronic pressure gauge by being connected on bleeder pipe has seen whether pressure drop, if pressure has pressure drop, Illustrate that wheel hub air-tightness is bad;

F: after detection, motor switch and stepper motor are closed in controller control, and the first solenoid valve, wheel hub are opened in control The air of inner cavity is discharged by bleeder pipe, when pressure sensor senses that hub inner lumen pressure is 0, control starting cylinder, and cylinder It drives the second briquetting to decline, after wheel hub is unclamped, takes out wheel hub.

Beneficial effects of the present invention:

(1), the present invention only need to inject air to hub inner lumen, compared to existing when the air-tightness to wheel hub detects Helium is used in technology, price is cheaper, and the present invention detects electrically charged air using charge tester, And the use cost of charge tester is far below helium mass analyzer, so that lower to the cost of the air-leakage test of wheel hub;

(2), the present invention is ionized by the air to hub inner lumen, is made the air of hub inner lumen with charge, is had The gas of charge by sand holes on the bad wheel hub of air-tightness or gap, by charge tester to electrically charged air into Row detection, is sounded an alarm after detection by alarm, compares bubble method and helium mass analyzer method, and entire detection process precision is high, and The case where capable of being carried out by double check, be not in missing inspection for wheel hub using electronic pressure gauge;

(3), the present invention controls each electric elements in apparatus of the present invention using controller, and controller can be according to prior Scheduled program starts by sequence motor switch, the first solenoid valve, second solenoid valve, stepper motor, cylinder and negative-pressure air fan etc., So that the present apparatus more automation and intelligence when carrying out air-leakage test to wheel hub, not only more saves labour, peace Overall coefficient is high, when detecting, does not also need for wheel hub to be enclosed in confined space, and operation is simpler, can also improve to wheel The working efficiency of hub air-leakage test.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the equipment of wheel hub air-leakage test of the present invention;

Fig. 2 is that Fig. 1 carries out the structural schematic diagram after compression sealing to wheel hub;

Fig. 3 is that the partial schematic diagram after rack is removed in Fig. 1;

Wherein, rack 1, power supply 2, gas source 3, the first briquetting 4, shaft 5, turntable 6, stepper motor 7, cylinder 8, the second briquetting 9, gas tube 10, the first spray point 11, the second spray point 12, negative-pressure air fan 13, charge amplifier 14, charge tester 15, It is bleeder pipe 16, the first solenoid valve 17, motor switch 18, second solenoid valve 19, controller 20, pressure sensor 21, roller 22, defeated Send band 23, alarm 24, rolling bearing 25, electronic pressure gauge 26, wheel hub 27.

Specific embodiment

Below with reference to attached drawing, the present invention is described in detail:

It is as shown in Figs. 1-3:

A kind of equipment of wheel hub air-leakage test, including rack 1 are provided with power supply 2, the voltage of power supply 2 in rack 1 Conveying mechanism is arranged in 1500V, gas source 3, conveying mechanism, sealing pressing mechanism and charge detection mechanism, sealing pressing mechanism The side of sealing pressing mechanism is arranged in one end, charge detection mechanism;Sealing pressing mechanism includes the first briquetting 4, the first briquetting 4 On be fixedly connected with shaft 5, shaft 5 is rotatably connected in rack 1, and turntable 6 and stepper motor 7, turntable are additionally provided in rack 1 6 drive rotation by stepper motor 7, are fixedly connected with cylinder 8 on turntable 6, and the second briquetting 9, the first pressure are fixedly connected on cylinder 8 Block 4 and the second briquetting 9 are equipped with, and the first briquetting 4 is provided with gas tube 10 and the first spray point close to the side of the second briquetting 9 11, gas tube 10 is connected to gas source 3, and the second briquetting 9 is provided with the second spray point 12 close to the side of the first briquetting 4, and first puts The needle point of acusector 11 and the second spray point 12 is in a straight line, and the first spray point 11 is electrically connected to one of them of power supply 2 Electrode, the second spray point 12 are electrically connected to another electrode of power supply 2;Charge detection mechanism includes negative-pressure air fan 13, negative pressure wind The rim clearance of machine 13 and wheel hub 27 cooperates, and negative-pressure air fan 13 is provided with charge amplifier 14 far from the side of wheel rim, and charge is put It is communicated with connecting tube between big device 14 and negative-pressure air fan 13, charge tester 15, the quantity of electric charge are provided on charge amplifier 14 Tester is the MHY-07183 type charge tester of beauty Hua Yi.

It is additionally provided with bleeder pipe 16 on first briquetting 4, the first solenoid valve 17 is provided on bleeder pipe 16.It is examined when to wheel hub 27 After survey finishes, the first solenoid valve 17 opens bleeder pipe 16, and intracavitary gas can be released by bleeder pipe 16 in wheel hub 27.

It is electrically connected with motor switch 18 between power supply 2 and the first spray point 11, is connected between gas source 3 and gas tube 10 Two solenoid valves 19, motor switch 18, the first solenoid valve 17, second solenoid valve 19, stepper motor 7, cylinder 8 and negative-pressure air fan 13 are equal It is connected with the same controller 20.Controller 20 can start by sequence motor switch 18, first according to the program being previously set Solenoid valve 17, second solenoid valve 19, stepper motor 7, cylinder 8 and negative-pressure air fan 13, so that the present apparatus is carrying out gas to wheel hub 27 More automation and intelligence, more saving labour when close property detects.

First briquetting 4 is provided with pressure sensor 21, pressure sensor 21 and controller 20 close to the side of the second briquetting 9 Electrical connection.When gas source 3, which is inflated by gas tube 10 into wheel hub 27, reaches preset pressure value, pressure sensor 21 is felt When should arrive upper pressure limit value, signal is passed into controller 20, controller 20 issues signal-off second solenoid valve 19, entire mistake Journey intelligentized control method will not cause danger because of operation error.

Conveying mechanism includes conveyer belt 23 and several rollers 22, and conveyer belt 23 is stretched on roller 22.Roller 22 rotates band Dynamic conveyer belt 23 is driven, and is transported wheel hub 27 close to one end of the first briquetting 4 and the second briquetting 9 by conveyer belt 23, reached When end, wheel hub 27 is entered under the action of inertia force on the second briquetting 9.

Alarm 24 is electrically connected on charge tester 15.When charge tester 15 detects the gas with charge When reaching acceptable definite value, alarm 24 issues alarm, and the air-tightness for the wheel hub 27 for reminding staff detecting reaches Less than requiring, the wheel hub 27 that air-tightness does not reach requirement is handled by staff.

Rolling bearing 25 is lined at the rotation connection of shaft 5 and rack 1.The setting of rolling bearing 25 is so that shaft 5 exists When relatively rotating with rack 1, frictional force and noise are smaller, extend the service life of shaft 5.

Electronic pressure gauge 26 is also communicated on bleeder pipe 16.In the detection process of air-tightness, if charge tester 15 Damage and staff does not have found, also continue detecting air-tightness with charge tester 15 and will lead to the missing inspection of wheel hub 27, In this way, the wheel hub of gas leakage, which uses, will cause serious consequence on automobile, so when detecting, staff can also pass through sight Examine electronic pressure gauge 26 whether pressure drop come judge wheel hub whether gas leakage, reach the dual fail-safe purpose of air-leakage test.

A kind of method of wheel hub air-leakage test: the following steps are included:

A: wheel hub 27 is transported to close to one end of the first briquetting 4 and the second briquetting 9 using conveyer belt 23, and relies on wheel hub The inertia of 27 movements enters between the first briquetting 4 and the second briquetting 9, if positional shift, wheel hub 27 is ajusted;

B: controller 20 control starting cylinder 8, cylinder 8 telescopic rod elongation, push the second briquetting 9 and with runner hub 27 to It is moved close to the direction of the first briquetting 4, the inner cavity of wheel hub 27 is compressed into sealing using the first briquetting 4 and the second briquetting 9;

C: wheel hub 27 compress sealing after, controller 20 control open second solenoid valve 19, from gas source 3 by gas tube 10 to Wheel hub is filled with air in 27 inner cavity, and when pressure threshold, pressure sensor 21 issues signal, and signal is passed to controller 20, controller 20 issues signal-off second solenoid valve 19;

D: motor switch 18 is opened in the control of controller 20, is discharged using the first spray point 11 and the second spray point 12, to wheel The air ionization of 27 inner cavity of hub has charge after the air ionization of 27 inner cavity of wheel hub, forms charged particle;

E: controller 20 controls stepper motor 7 and turntable 6 is driven to rotate, to rotate with runner hub 27, if wheel hub 27 is airtight Property is bad, and the electrically charged air of 27 inner cavity of wheel hub will be escaped from the wheel rim of wheel hub 27, be drawn to charge by negative-pressure air fan 13 In amplifier 14, charge tester 15 is reached by charge amplifier 14, charged particle is detected by charge tester 15 And sounded an alarm by alarm 24, and the meter of the electron pressure 26 by being connected on bleeder pipe 16 has seen whether pressure drop, if pressure Power has pressure drop, then illustrates that 27 air-tightness of wheel hub is bad;

F: after detection, motor switch 18 and stepper motor 7 are closed in the control of controller 20, and the first solenoid valve is opened in control 17, the air of 27 inner cavity of wheel hub is discharged by bleeder pipe 16, when pressure sensor 21 senses that 27 chamber pressure of wheel hub is 0, control System starting cylinder 8, cylinder 8 drive the decline of the second briquetting 9, after wheel hub 27 is unclamped, take out wheel hub 27.

The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferred embodiment to this hair It is bright to be described in detail, those skilled in the art should understand that, it can modify to technical solution of the present invention Or equivalent replacement should all cover without departing from the objective and range of technical solution of the present invention in claim of the invention In range.Technology not described in detail in the present invention, shape, construction portion are well-known technique.

Claims (10)

1. a kind of equipment of wheel hub air-leakage test, including rack, power supply, gas tube, sealing pressing mechanism, the first spray point and Second spray point, the sealing pressing mechanism include the first briquetting and the second briquetting, and the power supply, sealing pressing mechanism are respectively provided with On the rack;It is characterized by: being additionally provided with gas source, conveying mechanism and charge detection mechanism in the rack, the sealing adds One end of conveying mechanism is arranged in press mechanism, and the side of sealing pressing mechanism is arranged in the charge detection mechanism;Described first Shaft is fixedly connected on briquetting, the shaft rotation connection on the rack, is additionally provided with turntable and stepping electricity in the rack Machine, the turntable is driven by stepper motor to be rotated, and is fixedly connected with cylinder on the turntable, the cylinder is fixed with the second briquetting Connection, first briquetting and the second briquetting are equipped with, and the gas tube and the setting of the first spray point are close in the first briquetting The side of second briquetting, the gas tube are connected to gas source, and second spray point is arranged in the second briquetting close to the first briquetting Side, the needle point of first spray point and the second spray point is in a straight line, and first spray point is electrically connected to One of electrode of power supply, second spray point are electrically connected to another electrode of power supply, the charge detection mechanism peace Mounted in the side of the second briquetting.
2. a kind of equipment of wheel hub air-leakage test according to claim 1, it is characterised in that: the charge detection mechanism Including negative-pressure air fan, the rim clearance of the negative-pressure air fan and wheel hub cooperates, and the negative-pressure air fan is arranged far from the side of wheel rim There is charge amplifier, connecting tube is communicated between the charge amplifier and negative-pressure air fan, is provided on the charge amplifier Charge tester.
3. a kind of equipment of wheel hub air-leakage test according to claim 2, it is characterised in that: on first briquetting also It is provided with bleeder pipe, the first solenoid valve is provided on the bleeder pipe.
4. a kind of equipment of wheel hub air-leakage test according to claim 3, it is characterised in that: the power supply is put with first It is electrically connected with motor switch between acusector, second solenoid valve, the motor switch, are connected between the gas source and gas tube One solenoid valve, second solenoid valve, stepper motor, cylinder and negative-pressure air fan are respectively connected with the same controller.
5. a kind of equipment of wheel hub air-leakage test according to claim 4, it is characterised in that: first briquetting is close The side of second briquetting is provided with pressure sensor, and the pressure sensor is electrically connected with the controller.
6. a kind of equipment of wheel hub air-leakage test according to claim 5, it is characterised in that: the conveying mechanism includes Conveyer belt and several rollers, the conveying belt tension is on roller.
7. a kind of equipment of wheel hub air-leakage test according to claim 6, it is characterised in that: the charge tester On be electrically connected with alarm.
8. a kind of equipment of wheel hub air-leakage test according to claim 7, it is characterised in that: the shaft and rack Rolling bearing is lined at rotation connection.
9. a kind of equipment of wheel hub air-leakage test according to claim 8, it is characterised in that: also connect on the bleeder pipe It is connected with electronic pressure gauge.
10. a kind of detection method of wheel hub air tightness detection equipment according to claim 9, it is characterised in that: including following Step:
A: wheel hub is transported to close to one end of the first briquetting and the second briquetting using conveyer belt, and by the inertia of wheel hub movement It enters between the first briquetting and the second briquetting;
B: controller control starting cylinder, the telescopic rod elongation of cylinder push the second briquetting and with runner hub to close to the first pressure The direction of block moves, and the inner cavity of wheel hub is compressed sealing using the first briquetting and the second briquetting;
C: after wheel hub compresses sealing, second solenoid valve is opened in controller control, is filled from gas source by gas tube into hub inner lumen Enter air, when pressure threshold, pressure sensor issues signal, signal is passed to controller, controller issues signal Close second solenoid valve;
D: motor switch is opened in controller control, using the first spray point and the second electric discharge needle-discharging, to the air of hub inner lumen It ionizes, charge is had after the air ionization of hub inner lumen;
E: controller controls stepper motor and drives turntable rotation, to rotate with runner hub, if wheel hub air-tightness is bad, in wheel hub The electrically charged air of chamber will be escaped from the wheel rim of wheel hub, be drawn in charge amplifier by negative-pressure air fan, put by charge Big device amplifies charge signal, then reaches charge tester, detects charged particle by charge tester and by alarming Device sounds an alarm, and the electronic pressure gauge by being connected on bleeder pipe has seen whether pressure drop, if pressure has pressure drop, illustrates Wheel hub air-tightness is bad;
F: after detection, motor switch and stepper motor are closed in controller control, and the first solenoid valve, hub inner lumen are opened in control Air by bleeder pipe be discharged, pressure sensor sense hub inner lumen pressure be 0 when, control starting cylinder, cylinder drive The decline of second briquetting after unclamping wheel hub, takes out wheel hub.
CN201710660146.2A 2017-08-04 2017-08-04 A kind of device and method of wheel hub air-leakage test CN107228744B (en)

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CN107228744B true CN107228744B (en) 2019-05-31

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