CN210614397U - Gear quality detection line - Google Patents
Gear quality detection line Download PDFInfo
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- CN210614397U CN210614397U CN201921501315.9U CN201921501315U CN210614397U CN 210614397 U CN210614397 U CN 210614397U CN 201921501315 U CN201921501315 U CN 201921501315U CN 210614397 U CN210614397 U CN 210614397U
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Abstract
The utility model discloses a gear quality detection line, material loading wiper mechanism, gear parameter detection mechanism and gear unloading mechanism including the order sets up, material loading wiper mechanism including the clamping jaw that snatchs the gear, the clamping jaw passes through clamping jaw cylinder drive, the mounting panel of clamping jaw cylinder still sets up the first cylinder in the frame with the level and links to each other, still be equipped with the conveying chain of conveying gear in the frame, the conveying chain middle part is equipped with washing station and dry station, gear parameter detection mechanism includes that three stations are synchronous to be got the mechanism, three stations are synchronous to be got the mechanism below and correspond three station, wherein two stations all detect the gear parameter and feed back parameter testing result to the industrial control computer through the gear measuring apparatu, gear unloading mechanism includes certified products storage mechanism, reprocesses product district and nonconforming product district. This device can detect batch production's finished product gear, selects nonconforming product and can reprocess the article, ensures that every certified products assembles back noise of operation and life-span and accords with the designing requirement.
Description
Technical Field
The utility model relates to a gear precision detection device designs technical field, especially relates to a gear quality detection line.
Background
In the prior art, gear transmission refers to a device which directly transmits motion and power by using gear teeth of a driving wheel and a driven wheel. Among all the mechanical transmissions, the gear transmission is most widely used and can be used for transmitting motion and power between two shafts which are not far away from each other. The gear transmission is characterized in that: the gear transmission is stable, the transmission ratio is accurate, the work is reliable, the efficiency is high, the service life is long, and the used power, speed and size ranges are large. For example, the transfer power may be from very small to hundreds of thousands of kilowatts; the highest speed can reach 300 m/s; the gear diameter may be from a few millimeters to twenty more meters. However, the manufacture of the gears requires special equipment and the meshing transmission can produce noise. The gear transmission is a mechanical transmission which transmits power and movement by utilizing the mutual meshing of gear teeth of two gears. According to the relative position of gear axis, it is divided into parallel shaft cylindrical gear transmission, crossed shaft conical gear transmission and cross shaft helical gear transmission. Has the characteristics of compact structure, high efficiency, long service life and the like.
Among the various forms of transmission, gear transmissions are most widely used in modern machinery. This is because the gear transmission has the following characteristics: 1) the transmission precision is high. As mentioned above, belt transmission cannot guarantee accurate transmission ratio, chain transmission cannot realize constant instantaneous transmission ratio, but the transmission ratio of the involute gear commonly used in modern times is accurate and constant in theory. The method is not only a key requirement for precision machinery and instruments, but also an important condition for lightening the dynamic load and realizing stable transmission under high-speed heavy load; 2) the application range is wide. The power range of gear transmission is extremely wide and can be from 0.001W to 60000 kW; the peripheral speed can be very low and can also be as high as 150m/s, and belt transmission and chain transmission are difficult to compare; 3) the transmission between any two spatial shafts such as a parallel shaft, an intersecting shaft, a staggered shaft and the like can be realized, which cannot be realized by belt transmission and chain transmission; 4) the work is reliable, and the service life is long; 5) the transmission efficiency is high and is generally 0.94-0.99; 6) the manufacturing and installation requirements are high, so the cost is also high; 7) the requirements on environmental conditions are strict, except for the conditions of few low speed and low precision, the lubricating oil is generally required to be arranged in a box cover for dust prevention and scale prevention, and the lubrication is also required to be considered; 8) the transmission device is not suitable for transmission between two shafts which are far away; 9) the vibration damping and impact resistance are not as good as flexible transmission such as belt transmission.
The gear transmission has a lot of advantages, but the manufacturing of the gear is a very tedious process, the gear can be finished through a plurality of machining processes, the machining of the gear has precision requirements, and once a problem occurs in a certain link or a production error of a certain parameter affects the use of the gear. Therefore, the quality of the gear determines the using effect, and a high-quality gear depends on the processed material, the quality and the precision, but the precision of the gear, such as tooth profile, modulus, roundness and other parameters, is difficult and inefficient to detect manually. And the parameters of the gear are professional data and can be measured by a professional tool. Therefore, it is necessary to develop an automatic measuring and sorting system in the market to detect the gears, so that the efficiency of the gear manufacturing industry can be improved, and the measuring accuracy can be ensured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a gear quality detection line, can detect batch production's finished product gear, select the defective work and can reprocess the article, ensure that each certified products equipment back operating noise accords with the designing requirement with the life-span.
In order to achieve the above purpose, the utility model discloses a technical scheme is: a gear quality detection line comprises a feeding cleaning mechanism, a gear parameter detection mechanism and a gear blanking mechanism which are sequentially arranged, wherein the feeding cleaning mechanism comprises a clamping jaw for grabbing a gear, the clamping jaw is driven by a clamping jaw cylinder, a mounting plate of the clamping jaw cylinder is positioned on a sliding rail, the sliding rail is mounted on a rack of the cleaning mechanism, the mounting plate of the clamping jaw cylinder is also connected with a first cylinder horizontally arranged on the rack, a conveying chain for conveying the gear is further arranged on the rack, the front end of the conveying chain is positioned below the sliding rail, a supplementary air blowing nozzle is mounted at the rear end of the conveying chain, a cleaning station and a drying station are arranged in the middle of the conveying chain, door leaves are respectively arranged at the front end and the rear end of the cleaning station and the drying station, the door leaves are controlled to lift by a second cylinder, a plurality of cleaning nozzles for discharging water from multiple angles;
the gear parameter detection mechanism comprises a three-station synchronous clamping mechanism, the three-station synchronous clamping mechanism is controlled to lift through a third air cylinder, a mounting plate of the third air cylinder is positioned on a slide rail, the slide rail is arranged on a rack of the gear parameter detection mechanism, the mounting plate of the third air cylinder is also connected with a fourth air cylinder horizontally arranged on the rack, three stations correspond to the lower part of the three-station synchronous clamping mechanism, two stations detect gear parameters through a gear measuring instrument and feed back the parameter detection result to an industrial personal computer, and the tail end of the three-station synchronous clamping mechanism corresponds to a fifth air cylinder for gear blanking;
the gear blanking mechanism comprises a qualified product storage mechanism, a repair product area and an unqualified product area, the qualified product storage mechanism is connected with a qualified product blanking cylinder, the repair product area is connected with the repair blanking cylinder, the unqualified product area is connected with the unqualified product blanking cylinder, a clamping plate connected with a fifth cylinder is provided with three lattices, and the three lattices respectively correspond to the qualified product blanking cylinder, the repair blanking cylinder and the unqualified product blanking cylinder and extend material moving blocks.
Furthermore, as above, the conveying chain comprises two chains arranged side by side, a plurality of supporting plates are arranged between the two chains, clamping blocks matched with the inner ring of the gear are arranged on the supporting plates, and the upper parts of the clamping blocks are cross-shaped bulges.
Further, the conveying chain is driven by a plurality of coaxial chain wheels, a transmission mechanism is arranged on a shaft of each chain wheel, and the transmission mechanism is driven by a motor.
Further, the transmission mechanism as described above is one of a gear engagement mechanism, a chain sprocket mechanism, or a belt mechanism.
Furthermore, the supplementary blowing nozzle and the drying nozzle are connected with the air compressor through pipelines, and the cleaning nozzle is connected with the water tank through a pipeline and a water pump.
Furthermore, the gear measuring instruments are arranged on the first detection station in three numbers, and are respectively contacted with the gear to measure three parameters of upper end face runout, lower end face runout and shaft shoulder outer diameter runout, and the gear measuring instruments are contacted with the inner diameter of the gear on the second detection station to detect the roundness of the inner diameter of the gear and the comprehensive error data of runout, tooth profile, tooth direction and radial runout.
Further, the industrial personal computer controls the lattice motion displacement of the fifth cylinder.
Furthermore, the telescopic material moving block comprises a semicircular clamping jaw, the upper part of the clamping jaw is connected with a telescopic shaft of the cylinder, and the lower part of the clamping jaw is provided with a transverse plate which is parallel to the bottom of the grid of the fifth cylinder.
Compared with the prior art, the beneficial effects of the utility model are that: this device can carry out intelligent full detection to batch production's finished product gear, selects nonconforming product and can reprocess the article, ensures that every certified products post-assembly operating noise accords with the designing requirement with the life-span, the gear product of the arbitrary modulus of detectable and the number of teeth.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the feeding and cleaning mechanism of the present invention;
FIG. 3 is a schematic view of the gear parameter detecting mechanism of the present invention;
fig. 4 is the schematic view of the gear blanking mechanism of the present invention.
The labels in the figures are: 1. a feeding and cleaning mechanism; 2. a gear parameter detection mechanism; 3. a gear blanking mechanism; 11. a clamping jaw cylinder; 12. a first cylinder; 13. a second cylinder; 14. supplementing a blowing nozzle; 21. a three-station synchronous clamping mechanism; 22. a third cylinder; 23. a fourth cylinder; 24. a fifth cylinder; 31. a qualified product storage mechanism; 32. qualified product blanking cylinder; 33. repairing a blanking cylinder; 34. unqualified product unloading cylinder.
Detailed Description
The following detailed description is provided to further explain the technical features and advantages of the present invention by referring to the accompanying drawings in combination with the embodiments.
As shown in figures 1-4, the gear quality detection line of the utility model comprises a feeding cleaning mechanism 2, a gear parameter detection mechanism 2 and a gear blanking mechanism 3 which are arranged in sequence, wherein the feeding cleaning mechanism comprises a clamping jaw for grabbing a gear, the clamping jaw is driven by a clamping jaw cylinder 11, a mounting plate of the clamping jaw cylinder is positioned on a slide rail, the slide rail is arranged on a frame of the cleaning mechanism, the mounting plate of the clamping jaw cylinder is also connected with a first cylinder 12 which is horizontally arranged on the frame, a conveying chain for conveying the gear is also arranged on the frame, the front end of the conveying chain is positioned below the slide rail, a supplementary air blowing nozzle 14 is arranged at the rear end of the conveying chain, a cleaning station and a drying station are arranged in the middle of the conveying chain, door leaves are respectively arranged at the front end and the rear end of the cleaning station and the drying station, the door leaves are controlled to lift by a second cylinder, a plurality of drying nozzles for blowing air are arranged on the drying station;
the gear parameter detection mechanism comprises a three-station synchronous clamping mechanism 21, the three-station synchronous clamping mechanism is controlled to ascend and descend through a third air cylinder 22, a mounting plate of the third air cylinder is located on a sliding rail, the sliding rail is arranged on a rack of the gear parameter detection mechanism, the mounting plate of the third air cylinder is further connected with a fourth air cylinder 23 horizontally arranged on the rack, the three-station synchronous clamping mechanism corresponds to three stations below the three-station synchronous clamping mechanism, two stations detect gear parameters through a gear measurement instrument and feed back the parameter detection result to an industrial control computer, the tail end of the three-station synchronous clamping mechanism corresponds to a fifth air cylinder 24 for gear blanking, and the gear measurement instrument selects an east-to-west engineering measurement instrument.
The gear blanking mechanism comprises a qualified product storage machine 31, a repair product area and an unqualified product area, the qualified product storage mechanism is connected with a qualified product blanking cylinder 32, the repair product area is connected with a repair blanking cylinder 33, the unqualified product area is connected with an unqualified product blanking cylinder 34, a clamping plate connected with a fifth cylinder is provided with three lattices, and the three lattices respectively correspond to the qualified product blanking cylinder, the repair blanking cylinder and the unqualified product blanking cylinder and extend material moving blocks.
Further the conveying chain include two chains that set up side by side, install a plurality of backup pads between two chains, be equipped with in the backup pad with gear inner circle matched with fixture block, fixture block upper portion is the cross arch. The conveying chain is driven by a plurality of coaxial chain wheels, a transmission mechanism is arranged on a shaft of each chain wheel, and the transmission mechanism is driven by a motor. The transmission mechanism is one of a gear meshing mechanism, a chain and sprocket mechanism or a belt mechanism. The supplementary blow shower nozzle and dry shower nozzle all link to each other with the air compressor machine through the pipeline, wash the shower nozzle and pass through pipeline and water pump connection water tank.
The gear measuring instruments are in contact with the gear on the second detection station to detect the roundness of the inner diameter of the gear and the comprehensive error data of the run-out, the tooth profile, the tooth direction and the radial run-out. And the industrial control computer controls the lattice motion displacement of the fifth cylinder. The telescopic material moving block comprises a semicircular clamping jaw, the upper part of the clamping jaw is connected with a telescopic shaft of the cylinder, and the lower part of the clamping jaw is provided with a transverse plate which is parallel to the bottom of the grid of the fifth cylinder.
The utility model discloses the theory of operation of device does, and at first the second cylinder action stretches out and makes the clamping jaw get into the supplied materials district, and clamping jaw cylinder action drives clamping jaw cylinder downstream, and clamping jaw cylinder shrink is got the gear, presss from both sides tight back clamping jaw cylinder and first cylinder shrink, places on grabbing the gear fixture block of conveying chain to the gear, carries by the conveying chain and gets into clean district. The second cylinder contracts, the first door rises, the gear enters a cleaning station, the cleaning sprayer works to clean the gear, the second cylinder acts after the completion, the second door is opened, the transmission chain transmission gear enters a drying station, the drying sprayer works to dry the gear, the second cylinder acts after the drying is completed, the third door rises to be opened, the transmission chain is continuously conveyed forwards, the gear leaves a cleaning area, the supplementary blowing sprayer acts, supplementary blowing is carried out on the gear leaving the cleaning area, the drying is ensured, the gear feeding is clean and completed, and the detection feeding area waits.
When the gear parameter detection mechanism detects that a gear exists in the detection feeding area, the third air cylinder and the fourth air cylinder act together to enable the first station of the three-station synchronous clamping mechanism to come to the feeding area, the second station comes to the first detection station, and the third station comes to the second detection station. The three-station synchronous clamping mechanism acts to simultaneously grab the gears corresponding to the three stations, the third air cylinder and the fourth air cylinder are started again, the three-station synchronous clamping mechanism transplants the gear in the feeding area to the first detection station, transplants the gear in the first detection station to the second detection station, and transplants the gear in the second detection station to the discharging area, synchronous transplanting is achieved, and detection efficiency is improved. When the gear comes to a detection station I, the detection propulsion cylinder pushes three east fine engineering measuring instruments on the detection station I to contact the gear, three parameters of upper end face run-out, lower end face run-out and shaft shoulder outer diameter run-out are measured, the measurement result is output to an industrial control computer, the propulsion cylinder II is detected to act at the same time, the east fine engineering measuring instruments on the detection station II are pushed to contact the inner diameter of the gear, meanwhile, a standard gear on the comprehensive error detection mechanism is meshed with the detected gear to detect, the measurement of the roundness of the inner diameter of the gear and the comprehensive errors of run-out, tooth shape, tooth direction, radial run-out and the like is carried out, and the measurement. And when the detection is finished, the three-station synchronous clamping mechanism clamps the gear to a blanking waiting station. And the fifth cylinder is conveyed to a corresponding area according to a measurement result fed back by the industrial control computer.
After the detection is finished, the gear blanking mechanism carries out blanking according to the measurement result, if the result is unqualified, the gear is conveyed to an unqualified output position, and an unqualified product blanking cylinder acts to hook the unqualified gear to an unqualified area; if the result is qualified, the gear is conveyed to a qualified product storage structure, and a qualified blanking cylinder acts to clamp the qualified gear to a qualified product storage area; if the gear is repairable, the gear is conveyed to a repair output position, and the repair blanking cylinder acts to hook the repairable gear to a repair area.
The utility model discloses the step-by-step beat 20s ~ 30 s/piece of detection of device detects the flow as follows:
1. cleaning the surface of a finished gear to be detected by a feeding and cleaning mechanism;
2. transmitting the measurement data result to an industrial control computer CPU for processing in real time by using the Dongjing engineering measuring instrument;
3. screening out: qualified products, unqualified products, repairable products and the like, and automatically stacking the products in corresponding storage areas.
The device can measure a plurality of data of the gear, and the currently developed gear detector can measure the run-out of the upper end face, the run-out of the lower end face, the run-out of the outer diameter of the shaft shoulder, the roundness and the run-out of the inner diameter of the gear, the run-out of the tooth thickness error (O.B.D), the pitch circle error (P.C.D) and the like. The gear measuring instrument is a high-precision east-precision engineering measuring instrument E-DT-173F (TOKYO SEMITS), the minimum detection precision of the detection system is more than or equal to 0.02mm, and the precision resolution is 0.01 mm. The parameters of each gear can be measured very accurately.
The utility model discloses the device replaces artifical the detection completely, and material loading, washing, detection and unloading rely on equipment automatic operation entirely, realize that full automaton gear detects. The gear intelligent detection machine adopts a high-precision east-precision engineering measuring instrument to measure specific parameters of various gears, the measuring result is accurate and reliable, and human errors are completely avoided. And automatically analyzing the measured gears, and automatically classifying and storing the gears. The intelligent gear detection machine has the advantages of continuous beat, convenience and rapidness in detection, and great improvement in efficiency, and is suitable for large-batch gear detection requirements. The motor, the cylinder, the water pump, the air compressor, the Dongjing engineering measuring instrument, the industrial control computer and the software program thereof are the prior art or materials, and the technical personnel can directly purchase or order from the market according to the required product model and specification.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
The present invention is described in detail in the above embodiments, and it should be understood that the described embodiments are not limited to the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (8)
1. A gear quality detection line is characterized by comprising a feeding and cleaning mechanism, a gear parameter detection mechanism and a gear discharging mechanism which are sequentially arranged, the feeding and cleaning mechanism comprises a clamping jaw for grabbing a gear, the clamping jaw is driven by a clamping jaw air cylinder, a mounting plate of the clamping jaw air cylinder is positioned on a sliding rail, the sliding rail is mounted on a rack of the cleaning mechanism, the mounting plate of the clamping jaw air cylinder is also connected with a first air cylinder horizontally arranged on the rack, a conveying chain for conveying the gear is further arranged on the rack, the front end of the conveying chain is positioned below the sliding rail, a supplementary air blowing nozzle is mounted at the rear end of the conveying chain, a cleaning station and a drying station are arranged in the middle of the conveying chain, door leaves are respectively arranged at the front end and the rear end of the cleaning station and the front end and the rear end of the drying station, the door leaves are controlled to lift through a second air cylinder;
the gear parameter detection mechanism comprises a three-station synchronous clamping mechanism, the three-station synchronous clamping mechanism is controlled to lift through a third air cylinder, a mounting plate of the third air cylinder is positioned on a slide rail, the slide rail is arranged on a rack of the gear parameter detection mechanism, the mounting plate of the third air cylinder is also connected with a fourth air cylinder horizontally arranged on the rack, three stations correspond to the lower part of the three-station synchronous clamping mechanism, two stations detect gear parameters through a gear measuring instrument and feed back the parameter detection result to an industrial personal computer, and the tail end of the three-station synchronous clamping mechanism corresponds to a fifth air cylinder for gear blanking;
the gear blanking mechanism comprises a qualified product storage mechanism, a repair product area and an unqualified product area, the qualified product storage mechanism is connected with a qualified product blanking cylinder, the repair product area is connected with the repair blanking cylinder, the unqualified product area is connected with the unqualified product blanking cylinder, a clamping plate connected with a fifth cylinder is provided with three lattices, and the three lattices respectively correspond to the qualified product blanking cylinder, the repair blanking cylinder and the unqualified product blanking cylinder and extend material moving blocks.
2. The gear quality detection line according to claim 1, wherein the conveying chain comprises two chains arranged side by side, a plurality of supporting plates are arranged between the two chains, clamping blocks matched with the inner ring of the gear are arranged on the supporting plates, and the upper parts of the clamping blocks are cross-shaped protrusions.
3. The gear quality detection line of claim 2, wherein the conveyor chain is driven by a plurality of coaxial sprockets, and a transmission mechanism is mounted on a shaft of the sprocket and driven by a motor.
4. The gear quality detection line of claim 3, wherein the transmission mechanism is one of a gear engagement mechanism, a chain and sprocket mechanism, or a belt mechanism.
5. The gear quality detection line according to claim 4, wherein the supplementary blowing nozzle and the drying nozzle are connected with an air compressor through a pipeline, and the cleaning nozzle is connected with a water tank through a pipeline and a water pump.
6. The gear quality inspection line of claim 1, wherein the gear measurement instruments are three in number at the first inspection station, and are respectively in contact with the gear to measure three parameters of upper end face runout, lower end face runout and shaft shoulder outer diameter runout, and the gear measurement instruments are in contact with the gear inner diameter at the second inspection station to detect the roundness of the gear inner diameter and the comprehensive error data of runout, tooth profile, tooth direction and radial runout.
7. The gear mass sensing line of claim 6, wherein said industrial control computer controls the grid motion displacement of the fifth cylinder.
8. The gear quality detecting line according to claim 7, wherein the telescopic material moving block comprises a semicircular clamping jaw, the upper part of the clamping jaw is connected with a telescopic shaft of the cylinder, and the lower part of the clamping jaw is provided with a transverse plate which is flush with the bottom of the grid of the fifth cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921501315.9U CN210614397U (en) | 2019-09-10 | 2019-09-10 | Gear quality detection line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921501315.9U CN210614397U (en) | 2019-09-10 | 2019-09-10 | Gear quality detection line |
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| CN210614397U true CN210614397U (en) | 2020-05-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922904A (en) * | 2020-08-12 | 2020-11-13 | 浙江大学台州研究院 | Automatic feeding and discharging equipment for hub grinding machine machining |
| CN113000413A (en) * | 2021-05-06 | 2021-06-22 | 菲特（天津）检测技术有限公司 | System, method and terminal for detecting surface defects of synchronizer gear sleeve based on machine vision |
| CN113184518A (en) * | 2021-04-28 | 2021-07-30 | 邱占学 | Full-automatic extrusion-free feeding device |
| CN114570928A (en) * | 2022-02-24 | 2022-06-03 | 扬州钰能精密机械科技有限公司 | Automatic material taking and discharging mechanism of metal powder injection molding machine |
| CN114967395A (en) * | 2022-05-31 | 2022-08-30 | 珠海美景联合科技有限公司 | Selenium drum integration automatic assembly equipment of subsidiary NG detection function |
-
2019
- 2019-09-10 CN CN201921501315.9U patent/CN210614397U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922904A (en) * | 2020-08-12 | 2020-11-13 | 浙江大学台州研究院 | Automatic feeding and discharging equipment for hub grinding machine machining |
| CN113184518A (en) * | 2021-04-28 | 2021-07-30 | 邱占学 | Full-automatic extrusion-free feeding device |
| CN113000413A (en) * | 2021-05-06 | 2021-06-22 | 菲特（天津）检测技术有限公司 | System, method and terminal for detecting surface defects of synchronizer gear sleeve based on machine vision |
| CN113000413B (en) * | 2021-05-06 | 2022-07-05 | 菲特（天津）检测技术有限公司 | System, method and terminal for detecting surface defects of synchronizer gear sleeve based on machine vision |
| CN114570928A (en) * | 2022-02-24 | 2022-06-03 | 扬州钰能精密机械科技有限公司 | Automatic material taking and discharging mechanism of metal powder injection molding machine |
| CN114570928B (en) * | 2022-02-24 | 2023-01-03 | 扬州钰能精密机械科技有限公司 | Automatic material taking and discharging mechanism of metal powder injection molding machine |
| CN114967395A (en) * | 2022-05-31 | 2022-08-30 | 珠海美景联合科技有限公司 | Selenium drum integration automatic assembly equipment of subsidiary NG detection function |
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