JP6558766B2 - Test operation inspection method for drive unit - Google Patents

Description

  The present invention relates to a test operation inspection method for a drive device.

  For example, for a drive unit such as a transmission, in order to evaluate its performance (power transmission efficiency, etc.) after the assembly process, the drive unit is forcibly driven (test run) with a motor or the like to check its performance. (For example, refer to Patent Document 1).

JP-A-5-332883

  When performing this type of trial operation inspection, in order to perform inspection in an environment close to an actual driving situation, it is common to warm the drive device before the inspection. Since the test run inspection device is configured to be able to circulate and supply relatively high temperature oil into the drive device, it has been studied and actually used to warm the drive device using this test run test device. However, it takes a lot of time to heat the drive unit to the actual operating temperature (several tens of degrees) by circulating and supplying oil. It was necessary to prepare. This requires as much space in the factory as the number installed. Further, since the test run inspection apparatus has many expensive parts such as a motor, the equipment cost has been increased.

  On the other hand, with respect to this type of driving device, a leak test may be performed after the assembly process is completed. In this leak test, from the viewpoint of simplicity, an air leak test that checks the presence of air leaks (actually oil leaks) by measuring the change in air pressure when air is sent into an oil passage, In particular, there is a tendency to employ a differential pressure type leak test that can accurately inspect the presence or absence of air leakage at a minute level by measuring a differential pressure with a master workpiece (a workpiece having no leakage defect). Therefore, it seems that if the air leak test is used to send high-temperature air into the drive device, the drive device can be heated while performing the leak test.

  However, in the air leak test of the above-described method, even if high temperature air is simply sent into the inside of the drive device as a workpiece, the state where the air is sent is maintained until the pressure in the drive device reaches an equilibrium state (standby) ) In the meantime, the temperature of the drive device decreases. Therefore, it is necessary to set the temperature of the high-temperature air in anticipation of a temperature drop during this period, and it is difficult to stably raise the temperature of the drive device to a predetermined temperature. Further, since it is necessary to raise the temperature once exceeding a predetermined temperature and then lower the temperature to the predetermined temperature, it takes time and takes a long time to raise the temperature.

  In view of the above circumstances, the problem to be solved by the present invention is that the temperature of the drive device is raised to a predetermined temperature while the leak test is performed accurately and the time required for the test operation test is shortened. Thus, the necessary equipment cost and installation space are to be reduced.

  The solution to the above-described problem is achieved by the test operation test method for a drive device according to the present invention. That is, the test run inspection method includes a drive device assembly process, a submersion leak test process in which the drive apparatus is submerged in water to perform a leak test, a drying process in which the drive apparatus in which the submersion leak test has been performed is dried, and a drying process. And a test run inspection process in which the drive apparatus is tested and inspected, and is characterized by removing moisture from the drive apparatus and warming the drive apparatus in the drying process. In addition, high temperature air here shall mean the gas of temperature higher than normal temperature (a range of plus or minus 15 degreeC centering on 20 degreeC).

  According to the above method, the leak test of the drive device can be accurately performed by the submerged leak test. In addition, since the drive device can be dried immediately after the submergence leak test, there is no possibility of problems due to moisture adhesion and remaining. Of course, if the submersion leak test and the test run inspection are performed in the above-described order, it is ensured that the leak test is performed in a state where the oil supplied to the drive device during the test run blocks the hole of the drive device. Since this can be avoided, there is no possibility of causing a decrease in the accuracy of the leak test.

  Further, according to the above method, the water removal process after the submergence leak test and the temperature rising process before the test run test can be carried out in a common process (drying process), so that from the assembly process to the test run test process. Can be shortened. Also, when the temperature of the drive device is raised using a test run inspection device as in the prior art, the temperature is raised by circulating and supplying high-temperature oil to the oil passage inside the drive device. However, if the temperature is raised during the drying process, a direct and simple device dedicated to raising the temperature, such as a high-temperature air blowing device, can be employed. Can be shortened. Therefore, it is not necessary to install a plurality of temperature raising devices as in the prior art, and the equipment space can be reduced accordingly.

  Also, if the temperature of the drive device is raised in the drying process, a simple temperature rise device such as a high-temperature air blowing device is sufficient. It is not necessary to provide just for that. Therefore, the facility cost can be reduced as compared with the conventional case. Of course, the submerged leak test can be carried out at a relatively low cost among various leak tests, so there is no concern about the cost increase with respect to the equipment required for the leak test.

  As described above, according to the test operation inspection method according to the present invention, the leak test can be performed with high accuracy, but the time required from the assembly process to the test operation inspection is shortened, thereby reducing the necessary equipment cost and installation space. It becomes possible to reduce.

It is a flowchart which shows the flow of the test run inspection method which concerns on one Embodiment of this invention. It is a schematic diagram which shows typically a series of processes from the assembly process which concerns on one Embodiment of this invention to a test run inspection process.

  Hereinafter, the content of the test run inspection method according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the details will be described below by taking as an example a case where the target of the test run inspection is a transmission.

  As shown in FIG. 1, a test run inspection method according to an embodiment of the present invention includes (S1) an assembly process of a drive device, and (S2) a submerged leak test process in which a leak test is performed by submerging the assembled drive device in water. And (S3) a drying step of drying the drive device that has been subjected to the submergence leak test, and (S4) a test operation inspection step of performing a test run and inspecting the dried drive device. Hereinafter, details of each process will be described.

(S1) Assembly process First, each component of the transmission 1 manufactured individually is assembled in the process (process S1 in FIG. 2). The assembled transmission 1 is transported on the transport path 10 toward the submerged leak test process S2 which is the next process, for example, in a state of being placed on the pallet 2. In addition, the conveyance path 10 does not necessarily need to be continuously formed over each process S1-S4, and as long as the transmission 1 mounted in the pallet 2 can be continuously conveyed to the next process, arbitrary forms are possible. It is possible to take For example, although illustration is omitted, there is a structure in which a conveyance path is provided independently for each facility S1 to S4 and the transmission 1 placed on the pallet 2 can be delivered between these conveyance paths. It is also possible to take. At this time, the height of the conveyance path may be different from each other.

(S2) Submerged Leak Test Step Next, the transmission 1 is transported to the submerged leak test device 20 to perform a submerged leak test. Specifically, as shown in FIG. 2, the transmission 1 is lowered toward the water tank 21 provided below the conveyance path 10 and is submerged in the water 22 stored in the water tank 21. If possible, the transmission 1 together with the pallet 2 may be submerged in the water 22 as shown. In addition, an air supply component such as a coupler is attached to a predetermined portion of the transmission 1 before being lowered, and a predetermined opening is closed as necessary. At this time, a jig for preventing the components of the transmission 1 from falling off may be attached to the transmission 1 as necessary. In this way, after the transmission 1 is submerged in the water 22, air as a test fluid is sent into the interior of the transmission 1, for example, the oil passage from the air supply component, and air leakage from the transmission 1 at this time is prevented. Evaluate as the rise of water bubbles. It should be noted that the presence or absence of water bubbles may be visually confirmed by an operator, or the presence or absence of water bubbles may be automatically evaluated by analyzing an image obtained by imaging the inside of the water 22. It may be. Alternatively, the presence or absence of water bubbles may be automatically evaluated by detecting water bubbles with a sensor.

  When the submergence leak test is completed as described above, the transmission 1 together with the pallet 2 is raised, the pallet 2 is installed again on the conveyance path 10, and conveyance is started to the drying step S3 which is the next step. In addition, although the raising / lowering operation | movement of the transmission 1 mentioned above may be performed by an operator's hand, you may provide raising / lowering mechanisms, such as a lifter, for example.

(S3) Drying Step Next, the transmission 1 that has completed the submergence leak test is dried to remove moisture (such as water droplets) adhering to or remaining on the transmission 1. In the present embodiment, the moisture removing device 30 and the temperature raising device 40 are arranged side by side in the drying step S3, and after the moisture attached to or remaining on the transmission 1 is removed by the moisture removing device 30, the temperature raising device 40 is removed. To raise the temperature of the transmission 1. In detail, each of the devices includes a water removal device 30 having an air nozzle 31 attached to a casing, for example. The air removal device 30 has a predetermined pressure of air from the air nozzle 31 to the transmission 1 carried together with the pallet 2 into the water removal device 30. Spray. Thereby, moisture adhering to or remaining on the outer surface and inner surface of the transmission 1 is blown off and removed. The temperature raising device 40 also has, for example, an air nozzle 41 attached to the casing. The transmission 1 is carried out of the moisture removing device 30 and carried into the temperature raising device 40, and the temperature riser 40 is heated to a predetermined pressure from the air nozzle 41. Blow air (warm air). As a result, the temperatures of the parts constituting the outer surface such as the casing of the transmission 1 and the parts constituting the inner surface are raised.

  Note that the blow pressure and the blow time at the time of moisture removal by the moisture removal device 30 (at the time of air blowing) are arbitrary as long as the desired moisture removal can be achieved, and is appropriately determined depending on the form, size, etc. of the target transmission 1. Is set. Similarly, the blow pressure, the blow temperature, and the blow time at the time of temperature rise (during high-temperature air blow) by the temperature riser 40 are arbitrary as long as the target temperature rise can be achieved. The blow temperature is set to a predetermined temperature (for example, 60 ° C. to 120 ° C.) so that the transmission 1 is at a temperature during actual operation (for example, 40 ° C. to 80 ° C.) when transported to the inspection step S4. Note that, with the above configuration, a certain amount of moisture removing action can be expected even by the temperature raising device 40. Therefore, the blowing conditions by the moisture removing device 30 may be set in consideration of this point.

(S4) Test run inspection process The transmission 1 whose temperature has been increased as described above is conveyed to the test run test process S4, and the motor and shaft of the test run inspection apparatus are connected (not shown). Then, the test operation inspection device is started in a state where the fluid (lubricating oil) corresponding to the oil passage of the transmission 1 is supplied, and the transmission 1 is tested and its performance and durability are inspected. At this time, since the transmission 1 has already been heated to a predetermined temperature in the drying step S3, it is possible to immediately start trial operation and inspection without circulating high-temperature oil for a long time.

  Thus, according to the test run inspection method according to the present invention, the leak test of the transmission 1 can be accurately performed in the submerged leak test step S2. Moreover, since the transmission 1 can be dried immediately after the submergence leak test step S2, there is no possibility that a problem due to adhesion or remaining of moisture occurs. Further, according to the above method, the water removal process of the transmission 1 and the temperature raising process before the test run test can be performed together in the common process (drying process S3) after the submergence leak test process S2. The time required from the assembly step S1 to the test run inspection step S4 can be shortened. Also, by raising the temperature in the drying step S3, a direct and simple temperature-dedicated device such as a high-temperature air blowing device can be used for the temperature-raising device 40, so the time required for temperature-raising is shortened. it can. Therefore, it is not necessary to install a plurality of temperature raising devices as in the prior art, and the equipment space can be reduced accordingly. Further, if the temperature of the transmission 1 is raised in the drying step S3, a simple temperature riser 40 such as a high-temperature air blower is sufficient. It is not necessary to provide it only for temperature. Therefore, the facility cost can be reduced as compared with the conventional case.

  Further, in the present embodiment, in the drying step S3, the moisture removal process of the transmission 1 and the temperature raising process are performed by separate devices (moisture removing device 30 and temperature raising device 40). Blowing conditions suitable for each temperature are set, and as a result, the drying process including water removal and temperature rising can be completed in a shorter time.

  As mentioned above, although one Embodiment of this invention was described, this invention can also take a structure other than the above in the range which does not deviate from the meaning.

  For example, in the above-described embodiment, both the moisture removing device 30 and the temperature raising device 40 have been illustrated to remove moisture and raise the temperature of the transmission 1 by air blow from the air nozzles 31 and 41, but of course the invention is not limited to this configuration. . As long as moisture adhering to the transmission 1 can be removed, the moisture removing device 30 can take any configuration other than air blow. Similarly, the temperature raising device 40 can employ any configuration other than air blow as long as the transmission 1 can be raised to the temperature during actual operation.

  In addition, the transmission 1 that is the target of the test operation inspection method according to the present invention in the above embodiment may be manual (manual shift) or automatic (automatic shift). Further, the automatic transmission type may be any of so-called torque converter AT and CVT. The trial run inspection method according to the present invention can be applied to any type of transmission 1.

  In the above description, the transmission 1 is the target of the test operation inspection method according to the present invention. However, the present invention is not limited to this. The present invention can also be applied to other drive devices such as engines.

DESCRIPTION OF SYMBOLS 1 Transmission 2 Pallet 10 Conveyance path 20 Submerged leak test device 21 Water tank 22 Water 30 Water removal device 31, 41 Air nozzle 40 Temperature rising device S1 Assembly process S2 Submerged leak test process S3 Drying process S4 Trial operation inspection process

Claims (1)

Assembly process of the driving device;
A submerged leak test process in which the drive device is submerged in water to perform a leak test;
A drying step of drying the drive device that has performed the submersion leak test;
A test run inspection step of performing a test run and testing the dried drive device,
In the drying step, the moisture of the driving device is blown off by air blow and removed .
A test operation test method for a drive device, wherein the drive device is heated to a predetermined temperature by the air blow so that the drive device reaches a temperature during actual operation when transported to the test operation inspection step .

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