CN109182717B - Bending heat treatment process for bracket pipe fitting of aircraft engine - Google Patents
Bending heat treatment process for bracket pipe fitting of aircraft engine Download PDFInfo
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- CN109182717B CN109182717B CN201810996576.6A CN201810996576A CN109182717B CN 109182717 B CN109182717 B CN 109182717B CN 201810996576 A CN201810996576 A CN 201810996576A CN 109182717 B CN109182717 B CN 109182717B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005452 bending Methods 0.000 title claims abstract description 37
- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 238000010791 quenching Methods 0.000 claims abstract description 28
- 230000000171 quenching effect Effects 0.000 claims abstract description 28
- 238000005488 sandblasting Methods 0.000 claims abstract description 17
- 238000005496 tempering Methods 0.000 claims abstract description 17
- 238000005507 spraying Methods 0.000 claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 9
- 238000004321 preservation Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 7
- 229910001566 austenite Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
- B21D9/15—Bending tubes using mandrels or the like using filling material of indefinite shape, e.g. sand, plastic material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A bending heat treatment process for an aircraft engine support pipe fitting comprises the following steps: blanking, bending parts, austenitizing and heating treatment, water spraying and quenching, sand blasting treatment and tempering and cooling. The aviation support is not guaranteed by guaranteeing the strength of the workpiece and reducing the hardness of the workpiece in the traditional process in the treatment process, after the aviation support is treated by the process, the strength is improved by 10 percent, the fatigue resistance can be improved by more than 28 percent, and the service life is improved by more than 35 percent; the process is simple to operate, can realize automatic production, is low in cost and long in service life, solves the problems of short service life and low fatigue strength of the conventional aviation support, and ensures the precision of parts processed by the process by using a protection piece in the process.
Description
Technical Field
The invention relates to a process for processing a metal pipe fitting, in particular to a heat treatment process for bending an aircraft engine bracket pipe fitting.
Background
With the development of technology and economy, more and more civilian airlines are established and more private airplanes are used, and the demand for aviation components is increased year by year. The aircraft engine support is an important support part on the aircraft engine without leaving the aircraft engine, the aircraft engine support is generally a spatial frame structure formed by connecting hollow steel pipes after bending deformation, the quality of the bent pipe in the process is very critical to the whole support, for the treatment of aviation pipe fittings, no exact and effective method for achieving the high-quality and high-standard technology required by aviation parts is available at home, but the existing treatment cost for the pipe fittings is too high, or the fatigue strength is often too low and the service life is too short in the conventional pipe fitting processing technology, and along with the development of the aviation technology, when the fatigue resistance of other parts is stronger and the service life is longer and longer, the method is particularly important for improving the service life and the fatigue strength of the bracket pipe fitting of the aero-engine.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a bending heat treatment process for an aircraft engine bracket pipe fitting, which solves the technical problems of low fatigue strength and short service life of an aircraft engine bracket.
The problems of the present invention are not limited to the above-mentioned objects, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.
In order to achieve the purpose, the technical scheme of the invention is as follows: a bending heat treatment process for an aircraft engine support pipe fitting comprises the following steps:
(1) blanking: cleaning a pipe fitting which takes the hypoeutectoid steel with the C content of 0.38-0.45 as a raw material, keeping the raw material dry, and cutting the pipe fitting with a corresponding length as required;
(2) bending parts: putting the cut raw materials with corresponding lengths into a hydraulic pipe bender, performing simulation bending on a pipe fitting to be bent, bending an original part with a core after confirming that the bending is correct, and sleeving a special anti-rebound device at the bending position of the bent pipe fitting;
(3) austenitizing heat treatment: the bent original piece is timely sent to a heat treatment workshop, a rebound device is dismounted and hung below a guide rail of a closed combustion furnace through a special hanger, the original piece is loaded into a heating furnace at 650-680 ℃ along with the movement of the guide rail, the combustion furnace is heated to 890 +/-10 ℃ within 15 minutes, and the original piece is discharged after heat preservation for 60 +/-5 minutes;
(4) water spray quenching and surface shot blasting: after the workpiece is taken out of the furnace, the rail is changed into a rapid rail, the heated workpiece is transported to a quenching chamber within 15 seconds, a PAG water-soluble quenching agent is adopted as a quenching agent, the concentration of the quenching agent is 5 percent, and the temperature of the solution is kept between 2 ℃ and 10 ℃; putting a quenching agent into spraying equipment, and spraying the pipe fittings within 5 seconds; then conveying the workpiece to an adjacent sand blasting chamber within 10 seconds, carrying out high-speed sand blasting treatment on the outer wall of the pipe fitting, and correspondingly carrying out sand blasting treatment on the inner wall of the pipe at the corresponding pipe orifice; after the sand blasting is finished, the workpiece enters an adjacent cooling chamber, and the cooling chamber performs spray cooling on the workpiece in a normal-temperature water solution spraying mode until the pipe fitting is cooled to room temperature;
(5) tempering: and (3) conveying the cooled pipe fitting to a tempering furnace, wherein the temperature of the tempering furnace is 160 ℃, the temperature of the tempering furnace is heated to 280 +/-5 ℃ within 15 minutes, and the tempering and heat preservation are carried out for 150 +/-5 minutes.
(6) And (3) cooling: and (3) carrying out low-temperature air cooling on the tempered pipe fitting, conveying the tempered pipe fitting to a cooling channel, wherein the temperature of the cooling channel is-5-10 ℃, and moving out the cooling channel until the workpiece is cooled to room temperature after cooling for 15 minutes +/-5 minutes.
Further, in the bending process, the bending is cored bending, wherein the specific steps are that hot sand is added into the pipe fitting, the temperature of the hot sand is 120-135 ℃, the hot sand is filled in the pipe fitting, and two openings of the pipe fitting are blocked.
Furthermore, after the bent pipe is successfully bent, a protection piece matched with the shape and the angle of the bent part of the pipe fitting is selected and sleeved on the bent pipe fitting to prevent the bent pipe fitting from rebounding, and the protection piece is taken down when the bent pipe fitting needs to be heated.
Further, the pipe fitting is quenched only on the surface thereof by using the PAG water-soluble quenching agent, and is cooled in all directions when entering the cooling chamber.
Further, a waste water recovery system is arranged below the spraying of the aqueous solution in the quenching process.
The invention has the following advantages:
the aviation support is not guaranteed by guaranteeing the strength of the workpiece and reducing the hardness of the workpiece in the traditional process in the treatment process, after the aviation support is treated by the process, the strength is improved by 10 percent, the fatigue resistance can be improved by more than 28 percent, and the service life is improved by more than 35 percent; the process is simple to operate, can realize automatic production, is low in cost and long in service life, solves the problems of short service life and low fatigue strength of the conventional aviation support, and ensures the precision of parts processed by the process by using a protection piece in the process.
Detailed Description
The present invention will be described in detail below.
A bending heat treatment process for an aircraft engine support pipe fitting comprises the following steps:
(1) blanking: cleaning a pipe fitting which takes the hypoeutectoid steel with the C content of 0.38-0.45 as a raw material, keeping the raw material dry, and cutting the pipe fitting with a corresponding length as required. The former process of pipe bending ensures that the pipe is free of oil stains and enables the pipe to be bent. The pipe fitting is cleaned before being bent, so that the phenomenon of sliding parts can not occur when the part is bent, and the rejection rate of the part is reduced.
(2) Bending parts: the cut raw materials with corresponding lengths are put into a hydraulic pipe bender, the pipe fitting to be bent is simulated and bent, and the original piece is bent after the bending is confirmed to be correct. The bending simulation processing mainly comprises the steps of verifying the bending force and the bending speed, collecting and integrating data to find the most appropriate data for bending so as to reduce the rejection rate of the pipe fittings.
(3) Austenitizing heat treatment: the bent original piece is timely sent to a heat treatment workshop, a rebound device is dismounted and hung below a guide rail of a closed combustion furnace through a special hanger, the original piece is loaded into a heating furnace at 650-680 ℃ along with the movement of the guide rail, the combustion furnace is heated to 890 +/-10 ℃ within 15 minutes, and the original piece is discharged after heat preservation for 60 +/-5 minutes; the austenite can be more stably obtained by heating within the range of 890 +/-10 ℃, the heat preservation is carried out for 60 +/-5 minutes so as to enable the state of the austenite in the pipe fitting and the transformation of the austenite to be more complete, and after the heat preservation is carried out for more than 60 +/-5 minutes, resources are wasted on one hand, and the transformation of the austenite is complete on the other hand.
(4) Water spray quenching and surface sand blasting treatment: after the workpiece is taken out of the furnace, the rail is changed into a rapid rail, the heated workpiece is transported to a quenching chamber within 15 seconds, a PAG water-soluble quenching agent is adopted as a quenching agent, the concentration of the quenching agent is 5-10%, and the temperature of the solution is kept between 2 ℃ and 10 ℃; putting a quenching agent into spraying equipment, and spraying the pipe fittings within 5 seconds; then conveying the workpiece to an adjacent sand blasting chamber within 10 seconds, carrying out high-speed sand blasting treatment on the outer wall of the pipe fitting, and correspondingly carrying out sand blasting treatment on the inner wall of the pipe at the corresponding pipe orifice; and after the sand blasting is finished, the workpiece enters an adjacent cooling chamber, and the cooling chamber performs spray cooling on the workpiece in a normal-temperature water solution spraying mode until the pipe fitting is cooled to room temperature. The treatment makes the outer surface of the pipe fitting have stronger hardness, and the inner surface of the pipe fitting keeps good shaping, so that the fatigue resistance of the workpiece is stronger, and the service life is longer. The concentration of the quenching agent is 5-10% in order to save the spraying cost and reduce the load of spraying equipment to the maximum extent besides the normal spraying and the cooling effect. After heating, the tensile stress and the pressure on the pipe fitting during bending are eliminated, and a pre-pressing stress and a strengthening layer are generated on the surface of the pipe fitting in a subsequent process sand blasting process, so that the service life of the pipe fitting is prolonged.
(5) Tempering: and (3) conveying the cooled pipe fitting to a tempering furnace, wherein the temperature of the tempering furnace is 160 ℃, the temperature of the tempering furnace is heated to 280 +/-5 ℃ within 15 minutes, and the tempering and heat preservation are carried out for 150 +/-5 minutes.
(6) And (3) cooling: and (3) carrying out low-temperature air cooling on the tempered pipe fitting, conveying the tempered pipe fitting to a cooling channel, wherein the temperature of the cooling channel is-5-10 ℃, and moving out the cooling channel until the workpiece is cooled to room temperature after cooling for 15 minutes +/-5 minutes.
Furthermore, after the bent pipe is successfully bent, a protection piece matched with the shape and the angle of the bent part of the pipe fitting is selected and sleeved on the bent pipe fitting to prevent the bent pipe fitting from rebounding, and the protection piece is taken down when the bent pipe fitting needs to be heated. The protection piece prevents the pipe fittings from being stacked after being bent and avoids the rebound of the bent part during transportation.
Further, the surface of the pipe fitting is quenched only when the pipe fitting is quenched by using the PAG water-soluble quenching agent, and the pipe fitting is cooled in all directions when the pipe fitting enters the cooling chamber, that is, the surface of the pipe fitting is quenched only when the pipe fitting is quenched, and the whole pipe fitting is cooled integrally when the pipe fitting is cooled. The quenching process eliminates the compressive stress and the tensile stress inside the pipe fitting and improves the fatigue strength of the pipe fitting, and forms a strengthening layer outside the pipe fitting and generates the pre-compressive stress on the surface to further improve the fatigue strength.
Further, a waste water recovery system is arranged below the spraying of the aqueous solution in the quenching process. The water resource consumed in the process is recycled, can be reused, and is more environment-friendly and economical.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (5)
1. The bending heat treatment process for the support pipe fitting of the aero-engine is characterized by comprising the following steps:
(1) blanking: cleaning a pipe fitting which takes the hypoeutectoid steel with the C content of 0.38-0.45 as a raw material, keeping the raw material dry, and cutting the pipe fitting with a corresponding length as required;
(2) bending parts: putting the raw material cut into a corresponding length into a hydraulic pipe bender, performing simulation bending on a pipe fitting to be bent, and bending an original piece after confirming that the bending is correct;
(3) austenitizing heat treatment: the bent original piece is timely conveyed to a heat treatment workshop, hung below a guide rail of a closed combustion furnace through a hanger, and loaded into a heating furnace at 660-670 ℃ along with the movement of the guide rail, the combustion furnace is heated to 890 +/-10 ℃ within 15 minutes, and the temperature is preserved for 60 +/-5 minutes to be discharged;
(4) water spray quenching and surface sand blasting treatment: after the workpiece is taken out of the furnace, the rail is changed into a rapid rail, the heated workpiece is transported to a quenching chamber within 15 seconds, a PAG water-soluble quenching agent is adopted as a quenching agent, the concentration of the quenching agent is 7-9%, and the temperature of the solution is kept between 2 ℃ and 10 ℃; putting a quenching agent into spraying equipment, and spraying the pipe fittings within 5 seconds; then conveying the workpiece to an adjacent sand blasting chamber within 10 seconds, carrying out high-speed sand blasting on the outer wall of the pipe fitting, and carrying out inward sand blasting towards the port of each pipe fitting so as to realize sand blasting on the inner wall of each pipe fitting; after the sand blasting is finished, the workpiece enters an adjacent cooling chamber, and the cooling chamber performs spray cooling on the workpiece in a normal-temperature water solution spraying mode until the pipe fitting is cooled to room temperature;
(5) tempering: conveying the cooled pipe fitting to a tempering furnace, wherein the temperature of the tempering furnace is 160 ℃, the temperature of the tempering furnace is heated to 280 +/-5 ℃ within 15 minutes, and the tempering heat preservation time is 150 +/-5 min;
(6) and (3) cooling: and (3) cooling at low temperature after tempering, conveying the tempered pipe fitting to a cooling channel, controlling the temperature range of each part in the cooling channel to be between-5 and 10 ℃, cooling for 15min +/-5 min, then moving the workpiece out of the cooling channel, and continuing natural cooling to ensure that the workpiece is cooled to room temperature.
2. The aircraft engine bracket pipe bending heat treatment process according to claim 1, wherein in the bending process, the bending is cored bending, and the specific steps are that hot sand is added into the pipe, the temperature of the hot sand is 120-135 ℃, the hot sand is filled into the pipe, and two open ends of the pipe are blocked.
3. The heat treatment process for bending the pipe of the bracket of the aircraft engine according to claim 1, wherein after the bent pipe is successfully bent, a protection piece matched with the shape and the angle of the bent part of the pipe is selected and sleeved on the bent pipe, so as to prevent the bent pipe from rebounding, and the protection piece is removed when heating is needed.
4. The aircraft engine bracket pipe bending heat treatment process according to claim 1, wherein the quenching is performed by using a PAG water-soluble quenching agent, only the surface of the pipe is quenched, and the pipe is cooled omnidirectionally when entering the cooling chamber.
5. The aircraft engine bracket pipe bending heat treatment process according to claim 1, wherein a waste water recovery system is arranged below the water solution spray in the quenching process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810996576.6A CN109182717B (en) | 2018-08-29 | 2018-08-29 | Bending heat treatment process for bracket pipe fitting of aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810996576.6A CN109182717B (en) | 2018-08-29 | 2018-08-29 | Bending heat treatment process for bracket pipe fitting of aircraft engine |
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| Publication Number | Publication Date |
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| CN109182717A CN109182717A (en) | 2019-01-11 |
| CN109182717B true CN109182717B (en) | 2020-05-15 |
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| CN110405023B (en) * | 2019-08-21 | 2021-06-15 | 青岛越洋工程咨询有限公司 | Pipeline heat treatment process |
| CN112893561A (en) * | 2021-01-15 | 2021-06-04 | 滁州美杰精密部件制造有限公司 | Top cover bending process convenient to install |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5636330A (en) * | 1979-08-31 | 1981-04-09 | Sumitomo Metal Ind Ltd | Manufacture of elbow provided with straight pipe |
| JPH0247290B2 (en) * | 1984-06-20 | 1990-10-19 | Daiichi Koshuha Kogyo Kk | NETSUSHORISARETACHOKUKANBUTSUKIMAGEKANNOSEIZOHOHO |
| JP3856687B2 (en) * | 2001-11-15 | 2006-12-13 | アイシン高丘株式会社 | Manufacturing method of pipe-shaped impact reinforcement |
| CN101962707B (en) * | 2010-10-28 | 2012-05-30 | 攀钢集团钢铁钒钛股份有限公司 | Method for producing 42CrMo steel seamless steel tube |
| CN103088270A (en) * | 2011-11-03 | 2013-05-08 | 中国石油天然气集团公司 | Manufacturing method of X70 large-deformation steel fire-bent pipe |
| CN102837159B (en) * | 2012-07-30 | 2015-04-08 | 沈阳黎明航空发动机(集团)有限责任公司 | Method using 0 chromium (Cr) 17 nickel (Ni) 4 copper (Cu) 4 niobium (Nb) thin wall square pipes to machine and manufacture linkage ring guide pipe parts |
| CN104191174B (en) * | 2014-08-19 | 2017-02-15 | 北京北方车辆集团有限公司 | Hot bending-quenching compound forming technology for lower front arc deck |
| JP6784476B2 (en) * | 2015-03-24 | 2020-11-11 | 日本発條株式会社 | Manufacturing method of hollow stabilizer |
| JP6210172B2 (en) * | 2016-03-09 | 2017-10-11 | 新日鐵住金株式会社 | Hardened steel manufacturing method |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: A Heat Treatment Process for Bending Aircraft Engine Support Pipe Fitting Effective date of registration: 20230802 Granted publication date: 20200515 Pledgee: Jingzhou Tiansheng Financing Guarantee Co.,Ltd. Pledgor: JINGZHOU JIANGHAN ZHONGLI INDUSTRIAL Co.,Ltd. Registration number: Y2023980050633 |
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Granted publication date: 20200515 Pledgee: Jingzhou Tiansheng Financing Guarantee Co.,Ltd. Pledgor: JINGZHOU JIANGHAN ZHONGLI INDUSTRIAL Co.,Ltd. Registration number: Y2023980050633 |
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Denomination of invention: A bending heat treatment process for aviation engine bracket fittings Granted publication date: 20200515 Pledgee: Hubei Science and Technology Financing Guarantee Co.,Ltd. Pledgor: JINGZHOU JIANGHAN ZHONGLI INDUSTRIAL Co.,Ltd. Registration number: Y2024980039039 |