CN114291291B - Method for controlling high-low temperature time error performance of automatic unlocking device - Google Patents
Method for controlling high-low temperature time error performance of automatic unlocking device Download PDFInfo
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- CN114291291B CN114291291B CN202111472450.7A CN202111472450A CN114291291B CN 114291291 B CN114291291 B CN 114291291B CN 202111472450 A CN202111472450 A CN 202111472450A CN 114291291 B CN114291291 B CN 114291291B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000000047 product Substances 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 6
- 238000007689 inspection Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of unlocking devices, and discloses a method for controlling the high-low temperature time error performance of an automatic unlocking device, which is used for testing the time error of the high-low temperature of the automatic unlocking device, selecting an unqualified automatic unlocking device and recording the time error value; and decomposing the unqualified automatic unlocking device, carrying out dynamic balance measurement on the adjusting swing piece and the balance wheel in the unqualified automatic unlocking device, carrying out balance restoration on the unbalance amount after finding out the unbalance amount, and carrying out time error test at normal temperature again after returning the automatic unlocking device until the test passes. The invention integrates tin absorption and heating, and a single device can implement the work which is completed by two persons through the cooperation of the two devices in the past; the invention can realize uniform overall heating, uniform strength, no deformation of pins, no damage to devices, and very convenient and fast cleaning of tin particles after detaching the desoldering tool.
Description
Technical Field
The invention belongs to the technical field of unlocking devices, relates to a control method of an automatic unlocking device of an aircraft, and particularly relates to a method for controlling high-low temperature time error performance of the automatic unlocking device.
Background
In order to ensure that a life saving system on an aircraft can work normally under extreme environmental conditions, an automatic unlocking device on an aircraft ejection seat is required to be qualified in time error performance under the conditions of low temperature (55+/-2), high temperature (70+/-2) and normal temperature (25+/-10). After the automatic unlocking device is assembled, the high-low temperature and normal-temperature time errors of the product are required to be tested, the conventional automatic unlocking device assembling and debugging method only can debug and control the normal-temperature time errors of the automatic unlocking device, the normal-temperature time errors of the automatic unlocking device are guaranteed to meet the requirements, debugging and controlling cannot be performed on the high-low temperature time errors of the automatic unlocking device, no effective solution exists for the problems that the automatic unlocking device is qualified in normal-temperature time error debugging and the high-low temperature time errors are unqualified, only the automatic unlocking device with unqualified scrapped high-low temperature time errors can be adopted, and the automatic unlocking device with qualified high-low temperature and normal-temperature errors is selected to be submitted to an airplane for use.
The production and assembly period of the automatic unlocking device is longer, more than one hundred parts are involved, the automatic unlocking device is scrapped only because of unqualified high-low temperature time errors in the final product debugging stage, and the automatic unlocking device is extremely wasted in manpower and material resources and seriously affects the production and delivery efficiency of the automatic unlocking device.
Disclosure of Invention
The invention aims to:
in order to solve the problems, the invention provides a method for controlling the high-low temperature time error performance of an automatic unlocking device, which can obviously improve the product qualification rate.
The technical proposal of the invention is as follows:
a method for controlling the high-low temperature time error performance of an automatic unlocking device tests the time error of the high-low normal temperature of the automatic unlocking device, selects out unqualified automatic unlocking device, and records the time error value; and decomposing the unqualified automatic unlocking device, carrying out dynamic balance measurement on the adjusting swing piece and the balance wheel in the unqualified automatic unlocking device, carrying out balance restoration on the unbalance amount after finding out the unbalance amount, and carrying out time error test at normal temperature again after returning the automatic unlocking device until the test passes.
Further, the method specifically comprises the following steps:
step one, testing time errors of high temperature, low temperature and normal temperature of an automatic unlocking device, selecting out unqualified automatic unlocking device, and recording a certain height Wen Shijian measured value X of the automatic unlocking device 1 Also low temperature time measurement X 2 Calculating the measured value variable delta=X of the time test point of the product under the high and low temperature conditions 1 -X 2 ；
Decomposing the automatic unlocking device, and taking out the adjusting swing piece connected with the balance wheel;
measuring the adjusting swing piece and the balance wheel through a dynamic balancing machine, and recording the angle alpha of the gravity center deviation and the first unbalance amount delta displayed on the dynamic balancing machine;
step four, after the measurement is completed, the adjusting swing piece and the balance wheel are taken down, the adjusting swing piece and the balance wheel are placed on V-shaped iron, a part with an angle of alpha+180 DEG is found on the adjusting swing piece and the balance wheel, and weight adjustment is carried out on the part, so that the weight of the part is reduced by a certain amount smaller than delta;
step five, after drilling holes, the adjusting swing piece and the balance wheel are replaced on a dynamic balancing machine, re-measurement is carried out, if the second unbalance lambda of the adjusting swing piece and the balance wheel is reduced to a value smaller than a certain proportion of the first unbalance delta and the measured value variable delta, the next step is carried out, and if the requirements are not met, the step three to the step four are reworked;
step six: and (3) loading the adjusting swing piece and the balance wheel into an automatic unlocking device, rechecking the time errors of the high temperature, the low temperature and the normal temperature, and repeating the second to the fifth steps until the time errors are qualified if the time errors are unqualified.
Further, the period of time in the step one is 6.5s.
In the fourth step, the weight adjustment is performed by drilling the blind hole phi 2 plus or minus 0.2 with a drill bit, and the depth is determined according to the first unbalance amount delta.
Further, the amount in step four is 0.8 Δ.
Further, in the fifth step, the value smaller than the first imbalance amount delta to the measured variable delta is a certain ratio, specifically < (0.2 x delta/delta) g.
Further, in the third step, the specific method for measuring the adjusting swing piece and the balance wheel through the dynamic balancing machine is as follows: the adjusting swing piece and the balance wheel are erected on the upper surface of the dynamic balancing machine through the bracket and fixed, and then dynamic balance test is carried out on the adjusting swing piece and the balance wheel.
Further, the dynamic balance device used in the third step comprises a dynamic balance machine (1), a support (2) and a fixing screw (3), wherein the dynamic balance machine (1) is a test platform, the support (2) is of a structure with a U-shaped section, holes and grooves for installing and adjusting the balance piece and the balance wheel (4) are formed in two sides of the opening, the bottom of the support (2) is a plane, the support is fixedly arranged on the dynamic balance machine (1) through the fixing screw (3), the balance piece and the balance wheel (4) are arranged on the support (2), and the dynamic balance performance of the support is measured through the dynamic balance machine (1).
Drawings
FIG. 1 is a schematic diagram of a structure of an adjusting wobble plate with a balance wheel;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of a support structure;
FIG. 4 is a top view of FIG. 3;
fig. 5 is a schematic structural diagram for adjusting dynamic balance performance of the wobble plate and balance wheel.
Wherein, 1-dynamic balancing machine, 2-support, 3-set screw, 4-regulation pendulum piece link balance wheel.
Detailed Description
This section is an embodiment of the present invention for explaining and explaining the technical solution of the present invention.
An automatic unlocking device on an aircraft is required to be capable of meeting the requirements of time error performance under the conditions of low temperature (55+/-2), high temperature (70+/-2) and normal temperature (25+/-10) in order to ensure normal operation under extreme environmental conditions.
As shown in figures 1-3, the high-low temperature time error performance debugging system comprises a dynamic balancing machine 1, a support 2, a fixing screw 3 and an adjusting swing piece and balance wheel 4. The dynamic balancing machine consists of a test platform, a display screen and a test host.
The invention discloses a method for controlling the high-low temperature time error performance of an automatic unlocking device, which comprises the following specific steps:
step 1: testing the time errors of high temperature, low temperature and normal temperature of the automatic unlocking device, sorting out unqualified products, and recording the measured value X of 6.5S high Wen Shijian of the products 1 6.5S Low temperature time measurement X 2 Calculating the measured variable delta=X of the 6.5S time test point of the product under the high and low temperature conditions 1 -X 2 ；
Step 2: decomposing the product, and taking out the regulating swing piece connected with the balance wheel 4;
step 3: the support 2 is fixedly arranged on the dynamic balancing machine 1 through the fixing screw 3, the adjusting swing piece and the balance wheel 4 are placed on the support 2, and the angle alpha of the gravity center deviation and the unbalance delta displayed on the dynamic balancing machine 1 are recorded through the measurement of the dynamic balancing machine 1;
step 4: after the measurement is completed, the adjusting swing piece and the balance wheel 4 are taken down from the support 2 and placed on the V-shaped iron, a part with an angle of alpha+180 DEG is found on the adjusting swing piece and the balance wheel 4, and a blind hole phi 2+/-0.2 is drilled at the part, so that the weight of the part is reduced by 0.8 delta;
step 5: after drilling holes, the adjusting swing piece and the balance wheel 4 are replaced on the dynamic balancing machine 1, re-measurement is carried out, if the unbalance lambda of the adjusting swing piece and the balance wheel is reduced to < (0.2 delta/delta) g, the next step is carried out, and if the unbalance lambda does not meet the requirements, the steps 2-4 are reworked;
step 6: and (5) loading the adjusting swing piece and the balance wheel 4 into an automatic unlocking device, and rechecking the time errors of high temperature, low temperature and normal temperature.
Examples:
when the high-low temperature and normal temperature time error performance of the automatic unlocking device is tested for a certain time, the inspection results of the three normal temperature 4S, 6S and 6.5S time test points of the automatic unlocking device are found to be 4.05S, 6.08S and 6.50S, the normal temperature time error requirement (see table 1) is met, the normal temperature time error is qualified, the inspection results of the high temperature time error are found to be 4.20S, 6.41S and 6.93S, the inspection results of the low temperature time error are found to be 3.81S, 5.53 and 6.09S, the high-low temperature time error performance is unqualified, and the product is debugged according to the following steps:
step 1: the product has a measurement value X of 6.5S height Wen Shijian 1 For a low temperature time measurement of 6.93,6.5S X 2 Calculating the measured value variable delta=0.84 of the 6.5S time test point of the product under the high and low temperature conditions for 6.09;
step 2: decomposing the product, and taking out the regulating swing piece connected with the balance wheel 4;
step 3: the support 2 is fixedly arranged on the dynamic balancing machine 1 through the fixing screw 3, the adjusting swing piece and the balance wheel 4 are placed on the support 2, the dynamic balancing performance of the dynamic balancing machine is measured through the dynamic balancing machine 1, the unbalanced quantity delta is 0.305g, and the gravity center offset angle alpha is 74.47 degrees;
step 4: after the measurement is completed, the adjusting swing piece and the balance wheel 4 are taken down from the support 2 and placed on V-shaped iron, the angle and the offset of the gravity center offset displayed on the dynamic balancing machine 1 are pressed, the position with the angle of 254.47 degrees is found on the adjusting swing piece and the balance wheel 4, and the weight of the position is reduced by 0.244g by using a blind hole phi 2+/-0.2 of a drill bit at the position 2.8+/-0.2 away from the end face of the adjusting swing piece and the balance wheel 4;
step 5: after the hole is drilled, the adjusting swing piece and the balance wheel 4 are replaced on the dynamic balancing machine 1, the measurement is carried out again, the unbalance amount lambda=0.057g is less than 0.072g, and the gravity center offset angle is 21.35 degrees;
step 6: and (3) loading the adjusting swing piece and the balance wheel 4 into an automatic unlocking device, and rechecking the high-low temperature and normal temperature time errors, wherein the checking result is shown in a table 2, the requirements are met, and the products are qualified in debugging of the high-low temperature and normal temperature time errors.
Watch 1 automatic unlocking time error (S)
Table 2 automatic unlocking device time error checking result (S)
| Working point | 4 | 6 | 6.5 |
| Normal temperature (25+ -10) deg.C | 4.02 | 6.05 | 6.49 |
| Low temperature (-55 + -2) deg.C | 3.95 | 5.91 | 6.44 |
| High temperature (70+ -2) deg.C | 4.12 | 6.19 | 6.58 |
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and are not intended to limit the scope of the present invention, but all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention. The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (8)
1. A method for controlling the high-low temperature time error performance of an automatic unlocking device is characterized in that the time error of the high-low normal temperature of the automatic unlocking device is tested, the unqualified automatic unlocking device is selected, and the time error value is recorded; and decomposing the unqualified automatic unlocking device, carrying out dynamic balance measurement on the adjusting swing piece and the balance wheel in the unqualified automatic unlocking device, carrying out balance restoration on the unbalance amount after finding out the unbalance amount, and carrying out time error testing at high and low temperatures and normal temperature again after returning the automatic unlocking device until the test passes.
2. The method for controlling the high-low temperature time error performance of an automatic unlocking device according to claim 1, comprising the following steps:
step one, testing time errors of high temperature, low temperature and normal temperature of an automatic unlocking device, selecting out unqualified automatic unlocking device, and recording a certain height Wen Shijian measured value X of the automatic unlocking device 1 Also low temperature time measurement X 2 Calculating the measured value variable delta=X of the time test point of the product under the high and low temperature conditions 1 -X 2 ；
Decomposing the automatic unlocking device, and taking out the adjusting swing piece connected with the balance wheel;
measuring the adjusting swing piece and the balance wheel through a dynamic balancing machine, and recording the angle alpha of the gravity center deviation and the first unbalance amount delta displayed on the dynamic balancing machine;
step four, after the measurement is completed, the adjusting swing piece and the balance wheel are taken down, the adjusting swing piece and the balance wheel are placed on the V-shaped iron, a part with an angle of alpha+180 DEG is found on the adjusting swing piece and the balance wheel, and the weight of the part is adjusted, so that the weight of the part is reduced by a certain amount smaller than the unbalance amount delta;
step five, after drilling holes, the adjusting swing piece and the balance wheel are replaced on a dynamic balancing machine, re-measurement is carried out, if the second unbalance lambda of the adjusting swing piece and the balance wheel is reduced to a value smaller than a certain proportion of the first unbalance delta and the measured value variable delta, the next step is carried out, and if the requirements are not met, the step three to the step four are reworked;
step six: and (3) loading the adjusting swing piece and the balance wheel into an automatic unlocking device, rechecking the time errors of the high temperature, the low temperature and the normal temperature, and repeating the second to the fifth steps until the time errors are qualified if the time errors are unqualified.
3. The method of claim 2, wherein the time period in the first step is 6.5s.
4. The method for controlling the high-low temperature time error performance of an automatic unlocking device according to claim 2, wherein in the fourth step, the weight adjustment is performed by drilling a blind hole phi 2 plus or minus 0.2 with a drill, and the depth is determined according to the first unbalance amount delta.
5. The method of claim 2, wherein the amount in step four is 0.8 delta.
6. The method according to claim 2, wherein the value of the first imbalance delta to measured variable delta ratio is less than the value of step five, in particular < (0.2 x delta/delta) g.
7. The method for controlling the high-low temperature time error performance of the automatic unlocking device according to claim 2, wherein in the third step, the specific method for measuring the adjusting swing piece and the balance wheel through the dynamic balancing machine is as follows: the adjusting swing piece and the balance wheel are erected on the upper surface of the dynamic balancing machine through the bracket and fixed, and then dynamic balance test is carried out on the adjusting swing piece and the balance wheel.
8. The method for controlling the high-low temperature time error performance of the automatic unlocking device according to claim 7, wherein the dynamic balancing device used in the third step comprises a dynamic balancing machine (1), a support (2) and a fixing screw (3), the dynamic balancing machine (1) is a testing platform, the support (2) is of a U-shaped section, holes and grooves for installing and adjusting the balance wheels (4) are formed in two sides of an opening, the bottom of the support (2) is a plane, the balance wheels (4) are installed and fixed on the dynamic balancing machine (1) through the fixing screw (3), the balance wheels (4) are placed on the support (2), and the dynamic balancing performance of the balance wheels is measured through the dynamic balancing machine (1).
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