CN102706520A - Full-automatic testing system for air tightness of housing of transmission and detection method thereof - Google Patents

Full-automatic testing system for air tightness of housing of transmission and detection method thereof Download PDF

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Publication number
CN102706520A
CN102706520A CN2012101797549A CN201210179754A CN102706520A CN 102706520 A CN102706520 A CN 102706520A CN 2012101797549 A CN2012101797549 A CN 2012101797549A CN 201210179754 A CN201210179754 A CN 201210179754A CN 102706520 A CN102706520 A CN 102706520A
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test
transmission
signal
case
chassis
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CN2012101797549A
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CN102706520B (en
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骆正龙
顾荣荣
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上海汽车变速器有限公司
上海众骋机械设备制造有限公司
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Priority to CN201210179754.9A priority Critical patent/CN102706520B/en
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Abstract

The invention relates to a full-automatic testing system for air tightness of a housing of a transmission, which belongs to the technical field of detection of automobile parts. The full-automatic testing system comprises a system frame with a plugging framework, a workpiece identification device, a leakage testing instrument and a control system, wherein the workpiece identification device, the leakage testing instrument and the control system are respectively fixedly arranged above the system frame, the workpiece identification device and the leakage testing instrument are respectively connected with the control system and can output a trigger signal, a housing riveting force signal and a displacement signal, and the control system is respectively connected with the leakage testing instrument and Internet and can output a test command and various test situation data packets of the housing of the transmission to be tested. According to the full-automatic testing system disclosed by the invention, through an integral structure, all plugs are centralized on an intermediate plate, the plugging is performed by relying on an oil cylinder, and the structure is more stable than that in the prior art; and the full-automatic testing system is of an universal type housing air tightness leakage detection device which is developed for meeting the production requirements of large-batch, multi-variety and high-precision detection.

Description

Case of transmission impermeability full-automatic test system and detection method thereof

Technical field

What the present invention relates to is the device and method in a kind of auto parts and components detection technique field, specifically is a kind of case of transmission impermeability full-automatic test system and detection method thereof.

Background technology

It is the necessary link in its production technology that the sealing of automotive transmission housing detects; Airtight detection has a special cover airtight detecting apparatus, like the leak-testing instrument airtight detecting apparatus of the U.S., and the ATEQ airtight detecting apparatus of France; Existing airtight detection range is badly in need of a kind of system that can smooth full automatic Control and Feedback; Comprise the generation of airtight data, gather a series of process informations such as feedback.

Retrieval through to prior art is found, Chinese patent document number CN 201331418, and open day 2009-10-21 has put down in writing a kind of " housing air-tightness detection device "; This technology comprises frame, and upper rack is provided with first oil cylinder, and the bottom is provided with uncovered tank; Be provided with aerating device in the tank, be fixedly connected with vertical lift device on the base plate of tank, vertical lift device is provided with worktable; Worktable is provided with silica gel plate and air hole, workpiece is placed on the silica gel plate of worktable, compresses with first oil cylinder; Make silica gel plate produce distortion, and then guarantee the surface of contact good seal of workpiece and silica gel plate, through aerating device workpiece lumen is inflated then; When inflation reaches certain pressure,, the workpiece defectiveness is described then if the water in the tank emits bubble; This workpiece is a substandard product, if do not emit bubble, explains that then workpiece is specification product.But just observe not science, do not have the data judging foundation of science through naked eyes.Can not reach the detection requirement.

Chinese patent document number CN101936800A, open day 2011-01-05 relates to and detects the housing air tightness detection equipment, and its technical scheme is: the cylinder body of following oil cylinder is fixed on the underframe of steel framework, and the piston rod of following oil cylinder upwards is connected on the tank; Be provided with down guidance set between the underframe of tank and steel member; The both sides of tank are equipped with the up-down roller, and the up-down roller is embedded in the channel-section steel of steel framework column; The pressure-bearing cape is suspended on the suspension bracket of steel framework; Slide unit mechanism has passed through the roller wheel bearing of bottom setting on the pressure-bearing cape; Suppress frame mechanism and be arranged on slide unit mechanism top; The cylinder body of upper cylinder is fixed on the upper frame of steel framework, and the piston rod of upper cylinder is connected downwards and suppresses in the frame mechanism; Be provided with guidance set between the said upper frame that suppresses frame mechanism and steel framework; Push cylinder is horizontally disposed with, and the cylinder body of push cylinder is fixed on the steel framework, and the piston rod of push cylinder connects slide unit mechanism.Because more the stable of equipment that just have influence on more easily of mechanism, airtight test machine is also quite high to the stability requirement of equipment, and said structure is relatively loaded down with trivial details, and gear train is more, is difficult to satisfy existing test request.

Summary of the invention

The present invention is directed to the above-mentioned deficiency that prior art exists; A kind of case of transmission impermeability full-automatic test system and detection method thereof are provided,, all concentrate on each shutoff on the intermediate plate through monolithic construction; Rely on oil cylinder to carry out shutoff, it is more stable that structure is compared prior art; Can satisfy in enormous quantities, many kinds, the production demand of high Precision Detection and the universal housing impermeability leakage detection equipment developed.

The present invention realizes through following technical scheme:

The present invention relates to a kind of case of transmission impermeability full-automatic test system; Comprise: the system chassis, workpiece identification device, leak-testing instrument and the control system that have the shutoff framework; Wherein: workpiece identification device, leak-testing instrument and control system are fixedly set in the system chassis top respectively; The workpiece identification device links to each other with control system respectively with the leak-testing instrument and exports trigger pip, housing rivet force signal and displacement signal, and control system links to each other with the internet with the leak-testing instrument respectively and exports the test case packet of test instruction and each case of transmission to be measured.

Described system chassis comprises: have the lathe bed framework of driving mechanism and be set in turn in its inner shutoff framework, station platform, cistern assembly; Wherein: driving mechanism is fixedly set in lathe bed framework inside and is connected with cistern assembly, station platform and shutoff framework respectively; Realize cistern assembly and the elevating movement of shutoff framework and the tangential movement of station platform; Worktable is arranged at the lathe bed framework outside and is rigidly connected with lathe bed, and the occluder frame chord position is in the top of cistern assembly and over against case of transmission to be measured.

Described workpiece identification device comprises: be arranged on the system chassis a plurality of positions several post a letter switch be attached thereto and be arranged at the signal receiving unit on the system chassis; Said post a letter switch by housing to be tested pass through and the motion realization of system chassis triggers; And the output trigger pip exports trigger pip and triggered time to control system to signal receiving unit by signal receiving unit in the lump.

Described control system comprises: the recognition unit of signal resolution unit, built-in timer and output unit; Wherein: the signal resolution unit receives the trigger pip and the triggered time of workpiece identification system output; And according to recognition unit read the detecting information that obtains number check, test position is checked and test event is checked, and exports checked result to recognition unit; Recognition unit receives the checked result of signal resolution unit output and exports driving command and test instruction to system chassis and leak-testing instrument respectively; And regularly receive the housing rivet force signal and the displacement signal of leak-testing instrument output according to built-in timer, after analog to digital conversion, compare back output test item result to output unit with preset value; The test item result that output unit is exported according to numbering, current test duration, checked result and the recognition unit of the case of transmission of signal resolution unit output merges coding and processes the test case packet, and through internet output.

The present invention relates to the detection method of said system, may further comprise the steps:

The first step, system chassis startup also receive case of transmission to be measured one by one; The workpiece identification device is exported corresponding trigger pip to control system according to the switch of posting a letter that case of transmission to be measured triggers on each different running orbits; Receive to contain when control system and check digit and test item after surveying the trigger pip that case of transmission puts in place, and output test instruction to leak-testing instrument.

Second step, leak-testing instrument at first adopt the frequency of 1kHz that the rivet force signal is carried out cycle criterion; When the rivet force of continuous 10 points during greater than 0.1kN; Send instruction through control system and start LOAD CELLS and displacement transducer respectively and begin force signal and the collection of displacement signal, when the rivet force of continuous 30 points fluctuates, finish power and displacement signal collection in the 0.1kN scope when front connector;

The 3rd step, recognition unit adopt arithmetic mean filter method or middle position value filtering method to calculate force-time curve and displacement-time curve according to detected housing rivet force signal and displacement signal; The force-time curve and the displacement-time curve that obtain through the reperformance test to several times are then confirmed characteristic window and feature tolerances band; Obtain test result according to characteristic window and feature tolerances at last.

The 4th step, the test result that obtains when the detection of the 3rd step meet test impermeability standard then; Then recognition unit is exported driving command to system chassis and is withdrawed from case of transmission to be measured; Otherwise then export driving command to system chassis and by cistern assembly with whole motor body submergence and repeat second the step and the 3rd step; Be the wet type test, confirm the concrete defective locations of housing through the position that bubble is revealed.

Native system is furnished with hydraulic pressure and pneumatic system simultaneously, can realize the gas inspection and water inspection of case of transmission, and through electric unit PLC control, the Equipment Inspection precision is high, and stability is strong.

Description of drawings

Fig. 1 is invention system architecture synoptic diagram.

Fig. 2 is the system chassis synoptic diagram.

Embodiment

Elaborate in the face of embodiments of the invention down, present embodiment provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.

As depicted in figs. 1 and 2; The case of transmission impermeability full-automatic test system that present embodiment relates to; Comprise: the system chassis, workpiece identification device, leak-testing instrument and the control system that have the shutoff framework; Wherein: workpiece identification device, leak-testing instrument and control system are fixedly set in the system chassis top respectively; The workpiece identification device links to each other with control system respectively with the leak-testing instrument and exports trigger pip, housing rivet force signal and displacement signal, and control system links to each other with the internet with the leak-testing instrument respectively and exports the test case packet of test instruction and each case of transmission to be measured.

Described trigger pip comprises: the numbering of the current run location of Work position information such as case of transmission to be measured etc. and workpiece identification information such as case of transmission to be measured etc.

Described test case packet comprises: the test item result of the numbering of case of transmission to be measured, current test duration, checked result and recognition unit output.

Described housing rivet force signal and displacement signal are the time domain simulation signal.

Described system chassis comprises: have the lathe bed framework 0 of driving mechanism 4 and be set in turn in its inner shutoff framework 1, station platform 2, cistern assembly 3; Wherein: driving mechanism 4 is fixedly set in lathe bed framework 0 inside and is connected with cistern assembly 3, station platform and shutoff framework 1 respectively; Realize cistern assembly 3 and the elevating movement of shutoff framework 1 and the tangential movement of station platform; Worktable 2 is arranged at lathe bed framework 0 outside and is rigidly connected with lathe bed, and shutoff framework 1 is positioned at the top of cistern assembly 3 and over against case of transmission to be measured.

Described shutoff framework 1 comprises: the closeouts combination that links to each other with driving mechanism 4 respectively, this closeouts combination comprises: large end face shutoff, the shutoff of small-sized chamber, the shutoff of lateral row pore, the shutoff of oblique hole and top side vent port shutoff.

Described cistern assembly 3 comprises: casing 5, hydraulic mechanism 6 and lifting mechanism 7; Wherein: casing 5 is positioned at 0 bottom of lathe bed frame and is fixedly connected with hydraulic mechanism 6 respectively all around, and it is inner also through its inner oil cylinder promotion lifting device 7 risings that hydraulic mechanism 6 is arranged at lifting mechanism 7.

Described driving mechanism 4 comprises: have the Hydraulic Station 9 and cylinder assembly 10 of drive motor 8 and sundstrand pump, wherein: drive motor 8 is arranged on the Hydraulic Station 9, and each cylinder assembly 10 is connected with the closeouts of shutoff framework 1.

Described workpiece identification device (not shown) comprises: be arranged on the system chassis a plurality of positions several post a letter switch be attached thereto and be arranged at the signal receiving unit on the system chassis; Said post a letter switch by housing to be tested pass through and the motion realization of system chassis triggers; And the output trigger pip exports trigger pip and triggered time to control system to signal receiving unit by signal receiving unit in the lump.

The described switch of posting a letter specifically is arranged on the housing test zone periphery and case of transmission running orbit to be measured of system chassis.

The described switch of posting a letter comprises: trigger switch, barcode scanner and optical diode vision switch.

Described control system (not shown) comprises: the recognition unit of signal resolution unit, built-in timer and output unit; Wherein: the signal resolution unit receives the trigger pip and the triggered time of workpiece identification system output; And according to recognition unit read the detecting information that obtains number check, test position is checked and test event is checked, and exports checked result to recognition unit; Recognition unit receives the checked result of signal resolution unit output and exports driving command and test instruction to system chassis and leak-testing instrument respectively; And regularly receive the housing rivet force signal and the displacement signal of leak-testing instrument output according to built-in timer, after analog to digital conversion, compare back output test item result to output unit with preset value; The test item result that output unit is exported according to numbering, current test duration, checked result and the recognition unit of the case of transmission of signal resolution unit output merges coding and processes the test case packet, and through internet output.

Described leak-testing instrument is the capacitive character differential pressure pickup; Comprise LOAD CELLS, displacement transducer; The resolution of this sensor is 0.01-0.1Mbar, and test specification is 0-19.9Mbar, and linear test specification is ± 1% measurement range and supports Dp/Dt pattern (mbar/s).

Said system realizes detecting through following steps:

The first step, system chassis startup also receive case of transmission to be measured one by one; The workpiece identification device is exported corresponding trigger pip to control system according to the switch of posting a letter that case of transmission to be measured triggers on each different running orbits; Receive to contain when control system and check digit and test item after surveying the trigger pip that case of transmission puts in place, and output test instruction to leak-testing instrument.

Second step, leak-testing instrument at first adopt the frequency of 1kHz that the rivet force signal is carried out cycle criterion; When the rivet force of continuous 10 points during greater than 0.1kN; Send instruction through control system and start LOAD CELLS and displacement transducer respectively and begin force signal and the collection of displacement signal, when the rivet force of continuous 30 points fluctuates, finish power and displacement signal collection in the 0.1kN scope when front connector;

The 3rd step, recognition unit adopt arithmetic mean filter method or middle position value filtering method to calculate force-time curve and displacement-time curve according to detected housing rivet force signal and displacement signal; The force-time curve and the displacement-time curve that obtain through the reperformance test to several times are then confirmed characteristic window and feature tolerances band; Obtain test result according to characteristic window and feature tolerances at last.

The 4th step, the test result that obtains when the detection of the 3rd step meet test impermeability standard then; Then recognition unit is exported driving command to system chassis and is withdrawed from case of transmission to be measured; Otherwise then export driving command to system chassis and by cistern assembly 3 with whole motor body submergence and repeat second the step and the 3rd step; Be the wet type test, confirm the concrete defective locations of housing through the position that bubble is revealed.

Implement explanation: during work, workpiece is placed on the anchor clamps of loading and unloading station, be pushed to assigned address after; Manually press the both hands start button; Workpiece and pre-determined bit anchor clamps are sent to the coarse positioning position together, and plug rack drops to test position, and main compressed oil cylinder compresses latch is inserted the fine positioning hole on the anchor clamps base plate; Angling cylinder clamps workpiece, accomplishes the clamping fully of workpiece test position.

Subsequently; The leak on the workpiece is blocked in side direction and axial plug action, accomplishes the shutoff of workpiece, and shutoff is accomplished and promptly made an experiment to charging into pressurized air in the cavity volume of being tested after signal puts in place; As leak; Then can the pond be promoted to test position, check the particular location of leakage, loop ends.

Claims (10)

1. case of transmission impermeability full-automatic test system; It is characterized in that; Comprise: the system chassis, workpiece identification device, leak-testing instrument and the control system that have the shutoff framework; Wherein: workpiece identification device, leak-testing instrument and control system are fixedly set in the system chassis top respectively; The workpiece identification device links to each other with control system respectively with the leak-testing instrument and exports trigger pip, housing rivet force signal and displacement signal, and control system links to each other with the internet with the leak-testing instrument respectively and exports the test case packet of test instruction and each case of transmission to be measured;
Described control system comprises: the recognition unit of signal resolution unit, built-in timer and output unit; Wherein: the signal resolution unit receives the trigger pip and the triggered time of workpiece identification system output; And according to recognition unit read the detecting information that obtains number check, test position is checked and test event is checked, and exports checked result to recognition unit; Recognition unit receives the checked result of signal resolution unit output and exports driving command and test instruction to system chassis and leak-testing instrument respectively; And regularly receive the housing rivet force signal and the displacement signal of leak-testing instrument output according to built-in timer, after analog to digital conversion, compare back output test item result to output unit with preset value; The test item result that output unit is exported according to numbering, current test duration, checked result and the recognition unit of the case of transmission of signal resolution unit output merges coding and processes the test case packet, and through internet output;
Described trigger pip comprises: Work position information and workpiece identification information;
Described test case packet comprises: the test item result of the numbering of case of transmission to be measured, current test duration, checked result and recognition unit output;
Described housing rivet force signal and displacement signal are the time domain simulation signal.
2. system according to claim 1 is characterized in that, described Work position information comprises: the current run location of case of transmission to be measured; Described workpiece identification information comprises: the numbering of case of transmission to be measured.
3. system according to claim 1; It is characterized in that; Described system chassis comprises: have the lathe bed framework of driving mechanism and be set in turn in its inner shutoff framework, station platform, cistern assembly; Wherein: driving mechanism is fixedly set in lathe bed framework inside and is connected with cistern assembly, station platform and shutoff framework respectively; Realize cistern assembly and the elevating movement of shutoff framework and the tangential movement of station platform, worktable is arranged at the lathe bed framework outside and is rigidly connected with lathe bed, and the occluder frame chord position is in the top of cistern assembly and over against case of transmission to be measured.
4. system according to claim 3; It is characterized in that; Described shutoff framework comprises: the closeouts combination that links to each other with driving mechanism respectively, this closeouts combination comprises: large end face shutoff, the shutoff of small-sized chamber, the shutoff of lateral row pore, the shutoff of oblique hole and top side vent port shutoff.
5. system according to claim 3; It is characterized in that; Described cistern assembly comprises: casing, hydraulic mechanism and lifting mechanism; Wherein: casing is positioned at the lathe bed base of frame and is fixedly connected with hydraulic mechanism respectively all around, and it is inner also through its inner oil cylinder promotion lifting device rising that hydraulic mechanism is arranged at lifting mechanism.
6. system according to claim 3; It is characterized in that; Described driving mechanism comprises: have the Hydraulic Station and the cylinder assembly of drive motor and sundstrand pump, wherein: drive motor is arranged on the Hydraulic Station, and each cylinder assembly 10 is connected with the closeouts of shutoff framework 1.
7. system according to claim 1; It is characterized in that; Described workpiece identification device comprises: be arranged on the system chassis a plurality of positions several post a letter switch be attached thereto and be arranged at the signal receiving unit on the system chassis; Said post a letter switch by housing to be tested pass through and the motion realization of system chassis triggers, and the output trigger pip exports trigger pip and triggered time to control system to signal receiving unit by signal receiving unit in the lump.
8. system according to claim 7; It is characterized in that; The described switch of posting a letter is arranged on the housing test zone periphery and case of transmission running orbit to be measured of system chassis, and this switch of posting a letter comprises: trigger switch, barcode scanner and optical diode vision switch.
9. system according to claim 1; It is characterized in that; Described leak-testing instrument is the capacitive character differential pressure pickup, comprises LOAD CELLS, displacement transducer, and the resolution of this sensor is 0.01-0.1Mbar; Test specification is 0-19.9Mbar, and linear test specification is ± 1% measurement range and supports Dp/Dt pattern (mbar/s).
10. the detection method according to the said system of above-mentioned arbitrary claim is characterized in that, may further comprise the steps:
The first step, system chassis startup also receive case of transmission to be measured one by one; The workpiece identification device is exported corresponding trigger pip to control system according to the switch of posting a letter that case of transmission to be measured triggers on each different running orbits; Receive to contain when control system and check digit and test item after surveying the trigger pip that case of transmission puts in place, and output test instruction to leak-testing instrument;
Second step, leak-testing instrument at first adopt the frequency of 1kHz that the rivet force signal is carried out cycle criterion; When the rivet force of continuous 10 points during greater than 0.1kN; Send instruction through control system and start LOAD CELLS and displacement transducer respectively and begin force signal and the collection of displacement signal, when the rivet force of continuous 30 points fluctuates, finish power and displacement signal collection in the 0.1kN scope when front connector;
The 3rd step, recognition unit adopt arithmetic mean filter method or middle position value filtering method to calculate force-time curve and displacement-time curve according to detected housing rivet force signal and displacement signal; The force-time curve and the displacement-time curve that obtain through the reperformance test to several times are then confirmed characteristic window and feature tolerances band; Obtain test result according to characteristic window and feature tolerances at last;
The 4th step, the test result that obtains when the detection of the 3rd step meet test impermeability standard then; Then recognition unit is exported driving command to system chassis and is withdrawed from case of transmission to be measured; Otherwise then export driving command to system chassis and by cistern assembly with whole motor body submergence and repeat second the step and the 3rd step; Be the wet type test, confirm the concrete defective locations of housing through the position that bubble is revealed.
CN201210179754.9A 2012-06-01 2012-06-01 Full-automatic testing system for air tightness of housing of transmission and detection method thereof CN102706520B (en)

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CN103557996A (en) * 2013-11-14 2014-02-05 河北科技大学 Device and method for visually detecting leakproofness of four-station bearing part
CN104236824A (en) * 2014-09-05 2014-12-24 安徽伟嘉装备技术有限公司 Speed changer DCT assembly gas tightness detecting technology
CN104634513A (en) * 2014-12-12 2015-05-20 中国一拖集团有限公司 Tractor gearbox oil passage hole leakage detecting device and method
CN104697789A (en) * 2015-04-01 2015-06-10 上海汽车变速器有限公司 End-of-line detecting device for electronic driving unit
CN105300621A (en) * 2015-10-13 2016-02-03 上海正源汽车附件有限公司 Assembly air-tightness testing machine
CN106840528A (en) * 2016-12-28 2017-06-13 宁波考比锐特汽车科技有限公司 A kind of housing air tightness test platform
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CN108572071A (en) * 2017-12-04 2018-09-25 湖南吉盛国际动力传动系统有限公司 A kind of automatic transmission assembly test method

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557996A (en) * 2013-11-14 2014-02-05 河北科技大学 Device and method for visually detecting leakproofness of four-station bearing part
CN104236824A (en) * 2014-09-05 2014-12-24 安徽伟嘉装备技术有限公司 Speed changer DCT assembly gas tightness detecting technology
CN104634513A (en) * 2014-12-12 2015-05-20 中国一拖集团有限公司 Tractor gearbox oil passage hole leakage detecting device and method
CN104634513B (en) * 2014-12-12 2017-06-06 中国一拖集团有限公司 A kind of tractor gearbox body oil hole leak detecting device and detection method
CN104697789A (en) * 2015-04-01 2015-06-10 上海汽车变速器有限公司 End-of-line detecting device for electronic driving unit
CN104697789B (en) * 2015-04-01 2017-12-19 上海汽车变速器有限公司 Hybrid gearbox off-line test method
CN105300621A (en) * 2015-10-13 2016-02-03 上海正源汽车附件有限公司 Assembly air-tightness testing machine
CN106840528A (en) * 2016-12-28 2017-06-13 宁波考比锐特汽车科技有限公司 A kind of housing air tightness test platform
CN108572071A (en) * 2017-12-04 2018-09-25 湖南吉盛国际动力传动系统有限公司 A kind of automatic transmission assembly test method
CN108195526A (en) * 2017-12-30 2018-06-22 盛瑞传动股份有限公司 A kind of speed changer air-tightness Auto-Test System and its test method

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