CN103594243A - Manufacturing method capable of preventing sintered neodymium iron boron magnet from cracking - Google Patents
Manufacturing method capable of preventing sintered neodymium iron boron magnet from cracking Download PDFInfo
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Abstract
A manufacturing method capable of preventing a sintered neodymium iron boron magnet from cracking includes the steps of manufacturing a cast piece through conventional accelerator according to the composition ratio, manufacturing rough powder in a hydrogen decrepitation furnace with the hydrogen content lower than or equal to 400PPM, then, grinding the rough powder into fine powder in an air current mill, conducting twice pressing on a magnet which has undergone magnetic field orientation through different magnitudes of pressure so as to reduce internal stress, conducting temperature raising sintering on a product undergoing twice mold pressing in three sections at different temperature raising speeds and different vacuum degrees, removing moisture and organic additives respectively, eliminating gas and the internal stress in holes of the magnet, eliminating internal hidden dangers causing the magnet to crack, and lowering the temperature in three sections at different cooling speeds so that the large-sized magnet can be prevented from cracks caused by too rapid cooling. The contrast detection shows that the method can prevent the large-sized permanent magnet from cracking and can ensure the high performance magnetic characteristic of the sintered neodymium iron boron magnet.
Description
Technical field
The present invention relates to the preparation method of Sintered NdFeB magnet, particularly a kind of manufacture method that prevents the high-performance neodymium-iron-boron magnet cracking of monolithic weight over 10 kilograms.
Background technology
Bulk magnet is widely used in the fields such as the large-scale magnetic force apparatus in engineering, therapeutic medical nuclear magnetic resonance image instrument, but the preparation of bulk Sintered NdFeB magnet is very difficult, related application or the bonding mode of employing fritter, but will cause Magnetic field inhomogeneity like this, affect result of use; Or adopt electric excitation mode, but equipment becomes huge like this, heaviness, and not easy to operate.
Sintered NdFeB magnet is to adopt powder metallurgical technique preparation, and work flow is: break-airflow milling-orientation of raw material-melting-hydrogen, moulding-sintering.Powder pressed compact relative density before sintering is generally between 40%-60%, simultaneously due to through after series of processes above, pressed compact there will be some defects, comprising: the organic substance of interpolation, the steam of particle surface absorption, the internal stress that the hydrogen of bringing into when hydrogen is broken and moulding compacting cause etc.If can not eliminate well some above-mentioned defects in sintering densification process, magnet pole is prone to cracking situation, cannot produce bulk sintered NdFeB magnet steel at all.Therefore, Sintered NdFeB magnet, especially bulk Sintered NdFeB magnet magnet cracking has become the general character difficult problem in industry, study a kind of preparation method of bulk sintered NdFeB, improve the bulk sintered NdFeB level of production, meet the application of large-scale magnetic force apparatus, medical field, particularly important.
Summary of the invention
The present invention be directed to the above-mentioned state of the art and a kind of manufacture method that prevents Sintered NdFeB magnet cracking is provided, can effectively overcome the problem of Cracking of bulk magnet steel in preparation process, make the bulk Sintered NdFeB magnet that weight surpasses 10kg.
The technical solution adopted in the present invention is: prevent the manufacture method of Sintered NdFeB magnet cracking, comprise the following steps:
(1) press product grade proportioning, with conventional strip casting, prepare slab, make the slab that thickness is 0.25～0.50mm;
(2) above-mentioned slab is put into hydrogen broken furnace hydrogen break process, controlled hydrogen content≤400PPM, make powder particles≤500um meal material;
(3) the broken powder of above-mentioned hydrogen is put into airflow milling, control separation wheel rotating speed at inferior 3500～5500 revs/min, oxygen content≤10PP, makes the fine powder material that powder is 2.0～5.0um;
(4) by product different size, weight, choose suitable mould, the fine powder that air-flow is worn into is packed in mould, in the magnetic field of >=2.0T, be orientated;
(5) to carrying out the magnetic of magnetic field orientating, carried out secondary compacting, molding pressure is 3～5 Mpa for the first time, and 5～10 seconds press times, mold pressing density is controlled at 3.95～4.10 gram per centimeters
3, molding pressure is 1～3 Mpa for the second time, the press time is 8～15 seconds;
(6) to carry out three stages intensification sintering through secondary mould pressing product, first stage heats up, and while rising to 350 ℃ from normal temperature, controls 2.5 ℃/minute of programming rates, second stage heats up, while rising to 700 ℃ from 350 ℃, vacuum degree control≤5pa, programming rate is controlled at 1.5 ℃/minute, phase III heats up, while rising to 1030 ℃～1100 ℃ of sintering temperatures from 700 ℃, vacuum degree control≤3pa, programming rate is controlled at 1 ℃/minute;
(7) to above-mentioned cooling in three stages through three stages intensification sintered products, while being cooled to 700 ℃ from 1030～1100 ℃ of sintering temperatures, controlling cooling rate is 1 ℃/minute, from 700 ℃, being down to 500 ℃ is with the self cooling cooling of stove, while being cooled to room temperature from 500 ℃, adopt frequency conversion air-cooled to control 1.5 ℃/minute of chilling temperatures.
The method of described three stages intensification sintering is:
First stage, while being warming up to 350 ℃ from normal temperature, when temperature rises to 150～200 ℃, is incubated 3～5 hours vapour that anhydrates, and when temperature rises to 300～350 ℃, is incubated 3～5 hours and removes organic additive;
Second stage, is warming up to 700 ℃ from 350 ℃, keeps vacuum degree≤5Pa, when temperature rises to 580 ℃, is incubated 3～6 hours and carries out dehydrogenation;
Phase III, from 700 ℃, be warming up to 1030 ℃～1100 ℃ of sintering temperatures, maintenance vacuum degree≤3Pa, when temperature rises to 800 ℃, be incubated 5～8 hours, eliminate gas and internal stress in hole, be warming up to after 1030 ℃～1100 ℃ of sintering temperatures, be incubated 3～6.5 hours.
From the frequency conversion air-cooled of 500 ℃ of cooling room temperatures, for frequency conversion cooling controller to be installed at sintering furnace, control sintering rotation speed of fan, guarantee 1.5 ℃/minute of cooling mean temperatures.
The invention has the beneficial effects as follows: the principal element that causes bulk magnet sintering cracking has: aqueous vapor, surperficial organic attachment, hydrogen and internal stress.(1) the broken powder process time control hydrogen manufacturing content≤500PPm of hydrogen, because if hydrogen content is too high, in sintering process, the hydrogen of bulk magnet core is difficult to de-clean, final magnet cracking.(2) adopt the compressing mode of secondary pressing process, adopt high pressure to guarantee that powder pressing becomes green compact while suppressing for the first time, compacting for the second time suitably reduces pressure, improves the density uniformity of each portion of green compact, simultaneously release portion internal stress.(3) adopt heating process stage by stage: while being warming up to 350 ℃ from normal temperature, because magnet each several part changes little, programming rate is relatively very fast, control 2.5 ℃/min of programming rate, for eliminating the organic substance of particle surface aqueous vapor and removal surface attachment, therefore in the time of 150 ℃～200 ℃, be incubated 3～5h vapour that anhydrates, at 300～350 ℃ of insulation 3～5h, remove organic additives; While being warming up to 700 ℃ from 350 ℃, owing to having dehydrogenation and eutectic reaction, grain boundary structure changes needs suitably to lower programming rate, therefore controls 1.5 ℃/min of programming rate, is incubated 3～6h and carries out dehydrogenation in the time of 580 ℃, guarantees vacuum degree≤5Pa during this section simultaneously; From 700 ℃, be warming up to 1030-1100 ℃ of sintering temperature, this stage is the fast densified stage of magnet liquid-phase sintering, and this stage magnet each several part shrinks fast, so programming rate is adjusted to down 1 ℃/min once again, in the time of 800 ℃, be incubated 5～8h, the gas in elimination hole and internal stress etc. simultaneously.By heating process stage by stage, removed well the unfavorable factors such as steam that magnet surface adheres to and organic substance, hydrogen, internal stress, eliminated because of the caused cracking of above-mentioned factor.(4) owing to the reason such as expanding with heat and contract with cold, if the cooling too fast cooling cracking that easily causes.Bosher's artistic skill guarantees that chunk products is not because of the cooling too fast cooling cracking that causes stage by stage.
Embodiment
Embodiment 1
1, raw material melting: N48 trade mark product is pressed to Nd31Dy1.0Cu0.2Al0.2Co1.0B1.0Fe66.6
(wt%) proportioning, configuration 600kg raw material are put into vacuum induction melting furnace, be evacuated to≤5Pa of vaccum sensitive stove, add hot smelting rubescent to raw material, during drop to once again≤5Pa of the vacuum degree of induction furnace, stop vacuumizing, applying argon gas, reaches after-0.03 M Pa to the interior argon pressure of stove, adds the high-power melting of carrying out.Treat the solidifying casting of all molten clear laggard scanning frequency of raw material, during casting, water-cooled copper roller rotating speed is 1.0～2.5m/s, makes the slab that thickness is 0.25～0.50mm;
2, slab hydrogen is broken: 2.1 original techniques: slab is put into hydrogen broken furnace and carry out hydrogen break process, control hydrogen and contain
Amount≤1000PPm, the broken powder A of hydrogen that makes powder particles≤500 μ m expects.2.2 techniques of the present invention: slab is put into hydrogen broken furnace and carry out hydrogen break process, control hydrogen content≤400PPm, make the broken powder B material of hydrogen of powder particles≤500 μ m.
3, airflow milling powder: the A of above-mentioned preparation, two kinds of powder of B are carried out separately to airflow milling powder, separation wheel
Rotating speed is controlled at 3500～5500r/min, and Control for Oxygen Content≤10PPm makes powder particles 2.0～5.0 μ m; In powder, add 2.0ml/kg gasoline, 1ml/kg poly(ethylene oxide) allyl ether antioxidant.
4, orientation, moulding: according to product specification Φ 190*53, product weight 12kg, chooses suitable mould, pack A, B material into mould and be orientated in the orientation field of >=2.0T, is then pressed.4.1 adopt original technique orientation by A material, moulding, and moulding pressing pressure is 3～5MPa, the dwell time is 5～10s; Mold pressing density is controlled at 3.90～4.14g/cm3; 4.2 adopt secondary pressing process by B material; Compacting for the first time adopts pressure 3～5MPa, and the press time is controlled at 5～10s, and mold pressing density is controlled at 3.95～4.10g/cm3, guarantees that powder pressing becomes green compact; While suppressing for the second time, the pressure of employing is 1～3MPa, and the press time is 8～15s, improves the density uniformity of green compact, simultaneously the internal stress of release portion.
5, sintering is cooling: 5.1 A material adopt original technique, heat up: from normal temperature, to sintering temperature heating rate, be controlled at 1.5～5.0 ℃/min, at 300 ℃, 550 ℃, 800 ℃ are incubated respectively 1-3h, simultaneously whole temperature-rise period is controlled vacuum degree≤15Pa, 1030～1080 ℃ of sintering temperatures, insulation 3-8h; Cooling: cooling employing is cooled to 500 ℃ with stove, fill nitrogen from being as cold as 100 ℃, air-cooledly to room temperature, come out of the stove.
B material adopts heat up in three stages sintering and process for cooling in three stages.During intensification, while being warming up to 350 ℃ from normal temperature, because magnet each several part changes little, programming rate is relatively very fast, control 2.5 ℃/min of programming rate, for eliminating particle surface aqueous vapor and removing the organic substance of surface attachment, at 150 ℃～200 ℃ insulation 3～5h vapour that anhydrates, at 300～350 ℃ of insulation 3～5h, remove organic additives.
While being warming up to 700 ℃ from 350 ℃, owing to having dehydrogenation and eutectic reaction, grain boundary structure changes needs suitably to lower programming rate, controls 1.5 ℃/min of programming rate, is incubated 3～6h and carries out dehydrogenation in the time of 580 ℃, guarantees vacuum degree≤5Pa during this section simultaneously.
From 700 ℃, be warming up to 1030～1100 ℃ of sintering temperatures, this stage is the fast densified stage of magnet liquid-phase sintering, this stage magnet each several part shrinks fast, therefore programming rate is adjusted to down 1 ℃/min once again, keep vacuum degree≤3Pa, in the time of 800 ℃, be incubated 5～8h, to eliminate gas in hole and internal stress etc.When being warming up to 1030～1100 ℃ of sintering temperatures, be incubated 3～6.5 hours.
When cooling, from 1030 ℃～1100 ℃ of sintering temperatures, be cooled to 700 ℃, adopt equipment temperature control self cooling, controlling cooling rate is 1 ℃/min; While being cooled to 500 ℃ from 700 ℃, adopt self cooling with stove; Be cooled to room temperature from 500 ℃, adopt frequency conversion air-cooled, frequency conversion cooling controller is installed on sintering furnace, control sintering rotation speed of fan, guarantee 1.5 ℃/min of cooling mean temperature.
The A material cracking that adopts original technique to make, adopts the B material that the inventive method makes there is no cracking.
A material, the performance test of B material adopt NIM-200C HYSTERESIGRAPH TEST REPORT test, test is undertaken by < < GB/T 3217 permanent magnetism (Hard Magnetic) magnetism of material energy test method > > standard, and the A material and the B material property that make can all meet trade mark standard.
| Method | Goods | B r/kGs | H cj/kOe | (BH) m/MGOe |
| Former method | A | 13.8 | 12.5 | 47.0 |
| The inventive method | B | 13.8 | 13.0 | 47.0 |
embodiment 2
1, proportioning raw material melting: 38H trade mark product is pressed to Nd30.5Dy2.0Cu0.2Al0.4Co0.5B1.0Fe65.4(wt%), configuration 600kg raw material are put into vacuum induction melting furnace, be evacuated to≤5Pa of vaccum sensitive stove, add hot smelting rubescent to raw material, during drop to once again≤5Pa of the vacuum degree of induction furnace, stop vacuumizing, applying argon gas, reaches after-0.03 M Pa to the interior argon pressure of stove, adds the high-power melting of carrying out.Treat the solidifying casting of all molten clear laggard scanning frequency of raw material, during cast, water-cooled copper roller rotating speed is 1.0-2.5m/s, makes the slab that thickness is 0.25～0.50mm.
2, slab hydrogen is broken: 2.1 original techniques: slab is put into hydrogen broken furnace and carry out hydrogen break process, control hydrogen content≤1000PPm, make the broken powder A material of hydrogen of powder particles≤500 μ m.2.2 techniques of the present invention: slab is put into hydrogen broken furnace and carry out hydrogen break process, control hydrogen content≤500PPm, make the broken powder B material of hydrogen of powder particles≤500 μ m.
3, airflow milling powder: the A of above-mentioned preparation, two kinds of powder of B are carried out separately to airflow milling powder, and the rotating speed of separation wheel is controlled at 3500-5500r/min, Control for Oxygen Content≤10PPm makes powder particles 2.0～5.0 μ m; In powder, add 2.0ml/kg gasoline, 1ml/kg poly(ethylene oxide) allyl ether antioxidant.
, orientation, moulding; According to product specification Φ 200 * 39, product weight 10kg, chooses suitable mould, packs A, B material into mould, and be orientated in the orientation field of >=2.0T, be then pressed, 4.1 adopt original technique orientation by A material, moulding, moulding pressing pressure is 3-5MPa, the dwell time is 5-10s; Mold pressing density is controlled at 3.90-4.14g/cm3; 4.2 adopt secondary pressing process by B material; Compacting for the first time adopts pressure 3～5MPa, and the press time is controlled at 5～10s, and mold pressing density is controlled at 3.95～4.10g/cm3, guarantees that powder pressing becomes green compact; While suppressing for the second time, the pressure of employing is 1～3MPa, and the press time is 8～15s, improves the density uniformity of each portion of green compact, simultaneously the internal stress of release portion.
5, sintering is cooling; 5.1 A material adopt original technique, heat up: from normal temperature, to sintering temperature heating rate, be controlled at 1.5-5.0 ℃/min, at 300 ℃, 550 ℃, 800 ℃ are incubated respectively 1-3h, and simultaneously whole temperature-rise period is controlled vacuum degree≤15Pa, sintering temperature 1030-1080 ℃, insulation 3-8h; Cooling: cooling employing is cooled to 500 ℃ with stove, fill nitrogen from being as cold as 100 ℃, air-cooledly to room temperature, come out of the stove.
5
.2b material adopts heat up in three stages sintering and process for cooling in three stages.During intensification, while being warming up to 350 ℃ from normal temperature, because magnet each several part changes little, programming rate is relatively very fast, control 2.5 ℃/min of programming rate, for eliminating particle surface aqueous vapor and removing the organic substance of surface attachment, between 150 ℃～200 ℃, be incubated 3～5h vapour that anhydrates, at 300～350 ℃ of insulation 3～5h, remove organic additives.
While being warming up to 700 ℃ from 350 ℃, owing to having dehydrogenation and eutectic reaction, grain boundary structure changes needs suitably to lower programming rate, controls 1.5 ℃/min of programming rate, is incubated 3～6h and carries out dehydrogenation in the time of 580 ℃, guarantees vacuum degree≤5Pa during this section simultaneously.
From 700 ℃, be warming up to 1030～1100 ℃ of sintering temperatures, this stage is the fast densified stage of magnet liquid-phase sintering, this stage magnet each several part shrinks fast, therefore programming rate is adjusted to down 1 ℃/min once again, keep vacuum degree≤3Pa, insulation 5～8h is set in the time of 800 ℃ simultaneously, to eliminate gas in hole and internal stress etc.When being warming up to 1030～1100 ℃ of sintering temperatures, be incubated 3～6.5 hours.
When cooling, from 1030 ℃～1100 ℃ of sintering temperatures, be cooled to 700 ℃, adopt equipment temperature control self cooling, controlling cooling rate is 1 ℃/min; While being cooled to 500 ℃ from 700 ℃, adopt self cooling with stove; Be cooled to room temperature from 500 ℃, adopt frequency conversion air-cooled, frequency conversion cooling controller is installed on sintering furnace, control sintering rotation speed of fan, guarantee 1.5 ℃/min of cooling mean temperature.
The A material cracking that adopts original technique to make, adopts the B material that the inventive method makes there is no cracking.
A material, the performance test of B material adopt NIM-200C HYSTERESIGRAPH TEST REPORT test, test is undertaken by < < GB/T 3217 permanent magnetism (Hard Magnetic) magnetism of material energy test method > > standard, and the A material and the B material property that make can all meet trade mark standard.
| Method | Goods | B r/kGs | H cj/kOe | (BH) m/MGOe |
| Former method | A | 12.6 | 17.8 | 38.0 |
| This test method | B | 12.6 | 18.2 | 38.0 |
Claims (5)
1. the manufacture method that prevents Sintered NdFeB magnet cracking, its feature comprises the following steps:
(1) press product grade proportioning, with conventional strip casting, prepare slab, make the slab that thickness is 0.25～0.50mm;
(2) above-mentioned slab is put into hydrogen broken furnace hydrogen break process, controlled hydrogen content≤400PPM, make powder particles≤500um meal material;
(3) the broken powder of above-mentioned hydrogen is put into airflow milling, control separation wheel rotating speed at inferior 3500～5500 revs/min, oxygen content≤10PPM, makes the fine powder material that powder particles is 2.0～5.0um;
(4) by product different size, weight, choose suitable mould, the fine powder that air-flow is worn into is packed in mould, in the magnetic field of >=2.0T, be orientated;
(5) to carrying out the powder of magnetic field orientating, carried out secondary compacting, molding pressure is 3～5 Mpa for the first time, and 5～10 seconds press times, mold pressing density is controlled at 3.95～4.10 gram per centimeters
3, the second molding pressure is 1～3 Mpa, the press time is 8～15 seconds;
(6) to carry out three stages intensification sintering through secondary mould pressing product, first stage heats up, and while rising to 350 ℃ from normal temperature, controls 2.5 ℃/minute of programming rates, second stage heats up, while rising to 700 ℃ from 350 ℃, vacuum degree control≤5pa, programming rate is controlled at 1.5 ℃/minute, phase III heats up, while rising to 1030 ℃～1100 ℃ of sintering temperatures from 700 ℃, vacuum degree control≤3pa, programming rate is controlled at 1 ℃/minute;
(7) to above-mentioned cooling in three stages through three stages intensification sintered products, while being cooled to 700 ℃ from 1030～1100 ℃ of sintering temperatures, controlling cooling rate is 1 ℃/minute, from 700 ℃, being down to 500 ℃ is with the self cooling cooling of stove, while being cooled to room temperature from 500 ℃, adopt frequency conversion air-cooled, control 1.5 ℃/minute of chilling temperatures.
2. the manufacture method that prevents Sintered NdFeB magnet cracking according to claim 1, the first stage that it is characterized in that described three stages intensification sintering heats up, when temperature rises to 150 ℃～200 ℃, be incubated 3～5 hours vapour that anhydrates, when temperature rises to 300～350 ℃, be incubated 3～5 hours and remove organic additive.
3. the manufacture method that prevents Sintered NdFeB magnet cracking according to claim 1, is characterized in that second stage heats up, and is warming up to 700 ℃ from 350, keeps vacuum degree≤5pa, when temperature rises to 580 ℃, is incubated 3～6 hours and carries out dehydrogenation.
4. the manufacture method that prevents Sintered NdFeB magnet cracking according to claim 1, it is characterized in that phase III intensification, from 700 ℃, rise to 1030～1100 ℃ of sintering temperatures, keep vacuum degree≤3pa, when temperature rises to 800 ℃, be incubated 5～8 hours, eliminate gas and internal stress in hole, be warming up to after 1030～1100 ℃ of sintering temperatures, be incubated 3～6.5 hours.
5. the manufacture method that prevents Sintered NdFeB magnet cracking according to claim 1, it is characterized in that from 500 ℃ of frequency conversion air-cooleds that are cooled to room temperature for frequency conversion cooling controller to be installed at sintering furnace, control sintering rotation speed of fan, guarantee that cooling mean temperature is 1.5 ℃/minute.
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| CN103962555A (en) * | 2014-04-04 | 2014-08-06 | 徐州金石彭源稀土材料厂 | Method for sintering cylindrical or annular sintered NdFeB with height <= 30 mm |
| CN104128604A (en) * | 2014-07-01 | 2014-11-05 | 中磁科技股份有限公司 | Method for controlling atmosphere of sintering furnace |
| CN106399731A (en) * | 2015-07-27 | 2017-02-15 | 三环瓦克华（北京）磁性器件有限公司 | Degassing method for producing sintered neodymium-iron-boron |
| WO2017210957A1 (en) * | 2016-06-08 | 2017-12-14 | 浙江东阳东磁稀土有限公司 | Method for manufacturing rare-earth permanent magnetic material |
| CN108417375A (en) * | 2018-02-05 | 2018-08-17 | 宁波松科磁材有限公司 | A kind of preparation method without heavy rare earth sintered Nd-Fe-B permanent magnet |
| CN108806912A (en) * | 2018-05-02 | 2018-11-13 | 宁波科田磁业有限公司 | A kind of no heavy rare earth Sintered NdFeB magnet and preparation method thereof |
| TWI650432B (en) * | 2018-02-09 | 2019-02-11 | 中國鋼鐵股份有限公司 | METHOD FOR FABRICATING NdFeB MAGNET |
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| CN106399731A (en) * | 2015-07-27 | 2017-02-15 | 三环瓦克华（北京）磁性器件有限公司 | Degassing method for producing sintered neodymium-iron-boron |
| CN106399731B (en) * | 2015-07-27 | 2019-10-25 | 三环瓦克华（北京）磁性器件有限公司 | A kind of degassing method producing sintered NdFeB |
| WO2017210957A1 (en) * | 2016-06-08 | 2017-12-14 | 浙江东阳东磁稀土有限公司 | Method for manufacturing rare-earth permanent magnetic material |
| CN108417375A (en) * | 2018-02-05 | 2018-08-17 | 宁波松科磁材有限公司 | A kind of preparation method without heavy rare earth sintered Nd-Fe-B permanent magnet |
| TWI650432B (en) * | 2018-02-09 | 2019-02-11 | 中國鋼鐵股份有限公司 | METHOD FOR FABRICATING NdFeB MAGNET |
| CN108806912A (en) * | 2018-05-02 | 2018-11-13 | 宁波科田磁业有限公司 | A kind of no heavy rare earth Sintered NdFeB magnet and preparation method thereof |
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Address after: 315031 Cicheng Town West Gate, Jiangbei District, Ningbo City, Zhejiang Province Patentee after: Ningbo Ketian Magnetic Industry Co.,Ltd. Patentee after: NINGBO JINTIAN COPPER (GROUP) Co.,Ltd. Address before: 315034, No. 1 Chengxi West Road, Jiangbei District, Jiangbei District, Zhejiang, Ningbo Patentee before: NINGBO KETIAN MAGNET Co.,Ltd. Patentee before: NINGBO JINTIAN COPPER (GROUP) Co.,Ltd. |