CN102706520B - 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
CN102706520B
CN102706520B CN201210179754.9A CN201210179754A CN102706520B CN 102706520 B CN102706520 B CN 102706520B CN 201210179754 A CN201210179754 A CN 201210179754A CN 102706520 B CN102706520 B CN 102706520B
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test
transmission
signal
case
chassis
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CN201210179754.9A
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CN102706520A (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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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 a kind of case of transmission impermeability full-automatic test system and detection method thereof.

Background technology

The sealing propertytest of automobile speed variator is the necessary links in its production technology, airtight detection has special a set of airtight detecting apparatus, as the leak-testing instrument airtight detecting apparatus of the U.S., the ATEQ airtight detecting apparatus of France, existing airtight detection field is badly in need of a kind of system that can smooth full automatic control feedback, comprise the generation of airtight data, gather a series of process informations such as feedback.

Through the retrieval of prior art is found, Chinese patent literature CN 201331418, open day 2009-10-21, recorded a kind of " air-tightness detection device of shell body ", this technology comprises frame, upper rack is provided with the first oil cylinder, bottom is provided with uncovered tank, in tank, be provided with aerating device, on the base plate of tank, be fixedly connected with vertical lift device, in vertical lift device, be provided with worktable, on worktable, be provided with silica gel plate and air hole, workpiece is placed on the silica gel plate of worktable, use the first oil cylinder press, make silica gel plate produce distortion, and then the surface of contact good seal of assurance workpiece and silica gel plate, then by aerating device, workpiece lumen is inflated, when inflation reaches certain pressure, if the water in tank emits bubble, workpiece defectiveness is described, this workpiece is substandard product, if do not emit bubble, illustrate that workpiece is specification product.But just by naked eyes, observe not science, there is no the data judging foundation of science.Can not reach testing requirement.

Chinese patent literature CN101936800A, open day 2011-01-05, relates to detection housing airtightness detection apparatus, and its technical scheme is: the cylinder body of lower oil cylinder is fixed on the underframe of steel framework, and the piston rod of lower oil cylinder is upwards connected on tank; Between the underframe of tank and steel member, be provided with lower guidance set; The both sides of tank are provided with lifting roller, and lifting roller is embedded in the channel-section steel of steel framework column; Pressure-bearing cape is suspended on the suspension bracket of steel framework; Slipway mechanism has passed through the roller wheel bearing of bottom setting on pressure-bearing cape; Elastic-pressing frame mechanism is arranged on slipway 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 on elastic-pressing frame mechanism downwards; Between the upper frame of described elastic-pressing frame mechanism and steel framework, be provided with guidance set; Push cylinder is horizontally disposed with, and the cylinder body of push cylinder is fixed on steel framework, and the piston rod of push cylinder connects slipway mechanism.Because mechanism is more, just more easily have influence on the stable of equipment, 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 meet existing test request.

Summary of the invention

The present invention is directed to prior art above shortcomings, a kind of case of transmission impermeability full-automatic test system and detection method thereof are provided, by monolithic construction, each shutoff are all concentrated on intermediate plate, rely on oil cylinder to carry out shutoff, structure is more stable compared to existing technology; Can meet in enormous quantities, many kinds, the Production requirement that high precision detects and the General type casing Air leak test equipment developed.

The present invention is achieved by the following technical solutions:

The present invention relates to a kind of case of transmission impermeability full-automatic test system, comprise: with the system chassis of shutoff framework, workpiece identification device, leak-testing instrument and control system, wherein: workpiece identification device, leak-testing instrument and control system are fixedly installed on respectively system chassis top, workpiece identification device is connected with control system respectively and exports trigger pip with leak-testing instrument, housing rivet force signal and displacement signal, control system is connected with internet with 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: with 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 installed on 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 lathe bed framework outside and is rigidly connected with lathe bed, and 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 system chassis several switches and be attached thereto and be arranged at the signal receiving unit on system chassis of posting a letter of a plurality of positions, described post a letter switch by housing to be tested pass through and the motion of system chassis realizes and triggering, and export trigger pip to signal receiving unit, by signal receiving unit, export in the lump trigger pip and triggered time to control system.

Described control system comprises: the recognition unit of signal resolution unit, built-in timer and output unit, wherein: signal resolution unit receives trigger pip and the triggered time of workpiece identification system output, and according to recognition unit read the detecting information obtaining be numbered 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 respectively and drives instruction and test instruction to system chassis and leak-testing instrument, and regularly receive according to built-in timer housing rivet force signal and the displacement signal that leak-testing instrument is exported, after comparing with preset value, export test item result to output unit after analog to digital conversion; Output unit merges coding according to the test item result of the numbering of the case of transmission of signal resolution unit output, current test duration, checked result and recognition unit output and makes test case packet, and exports by internet.

The detection method that the present invention relates to said system, comprises the following steps:

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

First second step, leak-testing instrument adopt the frequency of 1kHz to carry out cycle criterion to rivet force signal, when the rivet force of continuous 10 points is greater than 0.1kN, by control system, send instruction and start respectively LOAD CELLS and displacement transducer and start force signal and the collection of displacement signal, when the rivet force of continuous 30 points fluctuates within the scope of 0.1kN, finish power and displacement signal collection 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 the housing rivet force signal and the displacement signal that detect; Then by reperformance test obtains to several times force-time curve and displacement-time curve, determine characteristic window and feature tolerances band; Finally according to characteristic window and feature tolerances, obtain test result.

The 4th step, the test result obtaining when the 3rd step detection meet test impermeability standard, recognition unit output drives instruction to system chassis and exits case of transmission to be measured, otherwise output drive instruction to system chassis and by cistern assembly by whole motor body submergence and repeat second step and the 3rd step, be wet type test, the concrete defective locations of location positioning housing of revealing by bubble.

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

Accompanying drawing explanation

Fig. 1 is invention system architecture schematic diagram.

Fig. 2 is system chassis schematic diagram.

Embodiment

Below embodiments of the invention are elaborated, the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.

As depicted in figs. 1 and 2, the case of transmission impermeability full-automatic test system that the present embodiment relates to, comprise: with the system chassis of shutoff framework, workpiece identification device, leak-testing instrument and control system, wherein: workpiece identification device, leak-testing instrument and control system are fixedly installed on respectively system chassis top, workpiece identification device is connected with control system respectively and exports trigger pip with leak-testing instrument, housing rivet force signal and displacement signal, control system is connected with internet with 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: Work position information as current run location of case of transmission to be measured etc. with workpiece identification information as numbering of 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 time domain simulation signal.

Described system chassis comprises: with 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 installed on 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 being connected 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 surrounding is fixedly connected with hydraulic mechanism 6 respectively, hydraulic mechanism 6 is arranged at lifting mechanism 7 inside and rises by its inner oil cylinder pushing lifting device 7.

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

Described workpiece identification device (not shown) comprises: be arranged on system chassis several switches and be attached thereto and be arranged at the signal receiving unit on system chassis of posting a letter of a plurality of positions, described post a letter switch by housing to be tested pass through and the motion of system chassis realizes and triggering, and export trigger pip to signal receiving unit, by signal receiving unit, export in the lump trigger pip and triggered time to control system.

The described switch of posting a letter is specifically 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: signal resolution unit receives trigger pip and the triggered time of workpiece identification system output, and according to recognition unit read the detecting information obtaining be numbered 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 respectively and drives instruction and test instruction to system chassis and leak-testing instrument, and regularly receive according to built-in timer housing rivet force signal and the displacement signal that leak-testing instrument is exported, after comparing with preset value, export test item result to output unit after analog to digital conversion; Output unit merges coding according to the test item result of the numbering of the case of transmission of signal resolution unit output, current test duration, checked result and recognition unit output and makes test case packet, and exports by internet.

Described leak-testing instrument is 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 detection by following steps:

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

First second step, leak-testing instrument adopt the frequency of 1kHz to carry out cycle criterion to rivet force signal, when the rivet force of continuous 10 points is greater than 0.1kN, by control system, send instruction and start respectively LOAD CELLS and displacement transducer and start force signal and the collection of displacement signal, when the rivet force of continuous 30 points fluctuates within the scope of 0.1kN, finish power and displacement signal collection 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 the housing rivet force signal and the displacement signal that detect; Then by reperformance test obtains to several times force-time curve and displacement-time curve, determine characteristic window and feature tolerances band; Finally according to characteristic window and feature tolerances, obtain test result.

The 4th step, the test result obtaining when the 3rd step detection meet test impermeability standard, recognition unit output drives instruction to system chassis and exits case of transmission to be measured, otherwise output drive instruction to system chassis and by cistern assembly 3 by whole motor body submergence and repeat second step and the 3rd step, be wet type test, the concrete defective locations of location positioning housing of revealing by bubble.

Implementation: during work, workpiece is placed on the fixture of loading and unloading station, be pushed to after assigned address, manually press both hands start button, workpiece is sent to coarse positioning position together with pre-determined bit fixture, and plug rack drops to test position, and main compressed oil cylinder compresses latch is inserted to the fine positioning hole on clamp bottom board, angling cylinder, by Workpiece clamping, completes the clamping completely of workpiece test position.

Subsequently, the leak on workpiece is blocked in side direction and axial plug action, complete the shutoff of workpiece, after putting in place, to being filled with pressurized air in tested cavity volume, tests shutoff settling signal, as leak, pond can be promoted to test position, check the particular location of leakage, circulation finishes.

Claims (9)

1. a case of transmission impermeability full-automatic test system, it is characterized in that, comprise: with the system chassis of shutoff framework, workpiece identification device, leak-testing instrument and control system, wherein: workpiece identification device, leak-testing instrument and control system are fixedly installed on respectively system chassis top, workpiece identification device is connected with control system respectively and exports trigger pip with leak-testing instrument, housing rivet force signal and displacement signal, control system is connected with internet with 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: signal resolution unit receives trigger pip and the triggered time of workpiece identification system output, and according to recognition unit read the detecting information obtaining be numbered 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 respectively and drives instruction and test instruction to system chassis and leak-testing instrument, and regularly receive according to built-in timer housing rivet force signal and the displacement signal that leak-testing instrument is exported, after comparing with preset value, export test item result to output unit after analog to digital conversion; Output unit merges coding according to the test item result of the numbering of the case of transmission of signal resolution unit output, current test duration, checked result and recognition unit output and makes test case packet, and exports by internet;
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 time domain simulation signal;
Described system chassis comprises: with 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 installed on 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 lathe bed framework outside and is rigidly connected with lathe bed, and occluder frame chord position is in the top of cistern assembly and over against case of transmission to be measured.
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 shutoff framework comprises: the closeouts combination being connected 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.
4. system according to claim 1, it is characterized in that, described cistern assembly comprises: casing, hydraulic mechanism and lifting mechanism, wherein: casing is positioned at lathe bed base of frame and surrounding is fixedly connected with hydraulic mechanism respectively, hydraulic mechanism is arranged at lifting mechanism inside and rises by its inner oil cylinder pushing lifting device.
5. system according to claim 1, it is characterized in that, described driving mechanism comprises: with Hydraulic Station and the cylinder assembly of drive motor and sundstrand pump, wherein: drive motor is arranged on Hydraulic Station, each cylinder assembly is connected with the closeouts of shutoff framework.
6. system according to claim 1, it is characterized in that, described workpiece identification device comprises: be arranged on system chassis several switches and be attached thereto and be arranged at the signal receiving unit on system chassis of posting a letter of a plurality of positions, described post a letter switch by housing to be tested pass through and the motion of system chassis realizes and triggering, and export trigger pip to signal receiving unit, by signal receiving unit, export in the lump trigger pip and triggered time to control system.
7. system according to claim 6, 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.
8. system according to claim 1, it is characterized in that, described leak-testing instrument is capacitive character differential pressure pickup, comprise LOAD CELLS, displacement transducer, the resolution of this sensor is 0.01-0.1Mbar, test specification is 0-19.9Mbar, and linear test specification is ± 1% measurement range, i.e. 0-19.9Mbar and support Dp/Dt pattern (mbar/s).
9. according to a detection method for system described in claim 6 or 7, it is characterized in that, comprise the following steps:
The first step, system chassis startup also receive case of transmission to be measured one by one, the switch of posting a letter that workpiece identification device triggers on each different running orbits according to case of transmission to be measured is exported corresponding trigger pip to control system, when control system, receive to contain after surveying the trigger pip that case of transmission puts in place and check digit and test item, and export test instruction to leak-testing instrument;
First second step, leak-testing instrument adopt the frequency of 1kHz to carry out cycle criterion to rivet force signal, when the rivet force of continuous 10 points is greater than 0.1kN, by control system, send instruction and start respectively LOAD CELLS and displacement transducer and start force signal and the collection of displacement signal, when the rivet force of continuous 30 points fluctuates within the scope of 0.1kN, finish power and displacement signal collection 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 the housing rivet force signal and the displacement signal that detect; Then by reperformance test obtains to several times force-time curve and displacement-time curve, determine characteristic window and feature tolerances band; Finally according to characteristic window and feature tolerances, obtain test result;
The 4th step, the test result obtaining when the 3rd step detection meet test impermeability standard, recognition unit output drives instruction to system chassis and exits case of transmission to be measured, otherwise output drive instruction to system chassis and by cistern assembly by whole motor body submergence and repeat second step and the 3rd step, be wet type test, the concrete defective locations of location positioning housing of revealing by bubble.
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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