KR0154234B1 - Rotor manufacturing method of canned pump using high frequency welding - Google Patents
Rotor manufacturing method of canned pump using high frequency welding Download PDFInfo
- Publication number
- KR0154234B1 KR0154234B1 KR1019950022069A KR19950022069A KR0154234B1 KR 0154234 B1 KR0154234 B1 KR 0154234B1 KR 1019950022069 A KR1019950022069 A KR 1019950022069A KR 19950022069 A KR19950022069 A KR 19950022069A KR 0154234 B1 KR0154234 B1 KR 0154234B1
- Authority
- KR
- South Korea
- Prior art keywords
- silicon steel
- steel sheet
- rota
- high frequency
- copper plate
- Prior art date
Links
- 238000003466 welding Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052802 copper Inorganic materials 0.000 claims abstract description 28
- 239000010949 copper Substances 0.000 claims abstract description 28
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 26
- 229910000679 solder Inorganic materials 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 6
- 239000010935 stainless steel Substances 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- 239000012530 fluid Substances 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005219 brazing Methods 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000003475 lamination Methods 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 238000002788 crimping Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/02—Cores, Yokes, or armatures made from sheets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Frames (AREA)
Abstract
본 발명은 유체를 강제 순환시키도록 된 캔드형 펌프에 있어서 모터하우징의 샤프트에 고정되어지는 로타의 제조방법에 관한 것으로,The present invention relates to a method for manufacturing a rotor fixed to a shaft of a motor housing in a canned pump for forced circulation of a fluid.
규소강판을 프레싱하고 적층시켜 로타를 제조하는 것에 있어서 상기 규소강판적층부(11)의 상하측에 구리플레트(23)를 연접시키고 그 외측에 스테인레스튜브(21)를 씌우며 상기 구리플레이트(23)와 스테인레스튜부(21)의 내향경사부(22) 사이에 은납링(26)을 재치시켜 통상의 고주파용착 방법에 의해 은납링(26)을 800∼900℃의 고온으로 용융 압착시켜 은납브레이징부(25)로 형성시키는 것인바,In manufacturing a rota by pressing and laminating a silicon steel sheet, the copper plate 23 is connected to the upper and lower sides of the silicon steel sheet laminated portion 11, and the stainless steel tube 21 is covered on the outside thereof, and the copper plate 23 is formed. ) And the silver solder ring 26 is placed between the inward inclined portion 22 of the stainless tubing 21, and the silver solder ring 26 is melt-pressed at a high temperature of 800 to 900 ° C. by a common high-frequency welding method. It is formed by (25),
효율이 향상되고 내식성 및 방수성이 뛰어난 로타를 제공할 수 있다.Rota can be provided with improved efficiency and excellent corrosion resistance and water resistance.
Description
제1도는 캔드형 펌프의 구조를 보인 종단면도.1 is a longitudinal sectional view showing the structure of a canned pump.
제2도는 종래의 로타를 보인 예시도.Figure 2 is an exemplary view showing a conventional rota.
제3도는 본 발명에 의해 제조된 로타의 구조를 보인 예시도.3 is an exemplary view showing a structure of a rota manufactured by the present invention.
제4도는 본 발명에 의해 제조된 로타의 평면도.4 is a plan view of a rota manufactured according to the present invention.
제5도는 제조상태를 보인 예시도.5 is an exemplary view showing a manufacturing state.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 캔드형 펌프 2 : 펌프하우징1: canned pump 2: pump housing
3 : 유입구 4 : 유출구3: inlet 4: outlet
5 : 임펠러 6 : 모터앤드쉴드5: impeller 6: motor and shield
7 : 모터하우징 8 : 고정자7: motor housing 8: stator
11 : 규소강판적층부 12 : 알루미늄외피11: silicon steel laminated part 12: aluminum shell
13 : 스테이터캔 20 : 로타13: stator can 20: rota
21 : 스테인레스튜브 22 : 내향경사부21: stainless tube 22: inclined portion
23 : 구리플레이트 24 : 만곡접착부23: copper plate 24: curved adhesive portion
25 : 은납브레이징부 26 : 은납링25: silver solder brazing unit 26: silver solder ring
27 : 고주파발생코일 28, 29 : 압착치구27: high frequency generating coil 28, 29: crimping jig
본 발명은 유체를 강제 순환시키도록 된 캔드형 펌프에 있어서 모터하우징의 샤프트에 고정되어지는 로타의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a rotor that is fixed to a shaft of a motor housing in a canned pump for forced circulation of a fluid.
좀더 상세하게는 로타를 구성하는 규소강판 적층부의 상하측에 구리 플레이트(COPPER PLATE)를 연접시키고 외측에 스텐레스튜브 씌운 후 상측외주연에 은납브레이징부로 구성된 로타 및 상기 로타를 고주파 용접에 의해 제조하도록 된 것이다.More specifically, the copper plate (COPPER PLATE) is connected to the upper and lower sides of the silicon steel sheet laminated part constituting the rotor, and the stainless steel tube is covered on the outer side, and the rotor and the rotor formed of silver solder brazing parts on the upper and outer edges are manufactured by high frequency welding. will be.
본 발명에 따른 상기 고주파용접 방법은 은납브레이징부와 상하구리플레이트의 일부용융시켜서 용착되어지도록 하는데 주지적인 특징이 있다.The high frequency welding method according to the present invention has a well-known feature to be welded by melting part of the silver brazing part and the upper and lower copper plates.
제1도는 캔드형펌프(1)의 구조를 보인 종단면도이다.1 is a longitudinal cross-sectional view showing the structure of a canned pump (1).
모터하우징(7)의 고정자에 전원이 압력되면 회전자인 로타(10)가 회전되고 모터앤드쉴드(6)의 상측에 축착된 임펠러(5)도 회전된다. 임펠러(5)가 회전되면 펌프하우징(2)의 유입구(3)를 통하여 유입된 유체는 상기 임펠러(5)에 의해 강제 순환되어진 후 유출구(4)를 통하여 배출된다.When power is applied to the stator of the motor housing 7, the rotor 10, which is a rotor, is rotated, and the impeller 5, which is condensed on the upper side of the motor and shield 6, is also rotated. When the impeller 5 is rotated, the fluid introduced through the inlet 3 of the pump housing 2 is forcedly circulated by the impeller 5 and then discharged through the outlet 4.
이와 같이 캔드형펌프(1)가 작동되는 동안 펌프하우징(2)의 임펠러실에 있던 유체가 임펠러(5)의 회전에 의해 발생되는 압력에 의해 그 일부가 샤프트(9)와 베어링 및 모터앤드쉴드(6)의 연접부를 통하여 스테이터캔(13)의 내부로 유입되어져 충진되며 스테이터캔(16)의 내부로 유입된 유체는 그 일부가 역류되어 배출된다.In this way, the fluid in the impeller chamber of the pump housing 2 during the operation of the canned pump 1 is partially caused by the pressure generated by the rotation of the impeller 5 and the shaft 9, the bearing and the motor and shield. The fluid introduced into the stator can 13 through the junction portion 6 is filled, and the fluid introduced into the stator can 16 is discharged by counterflowing part thereof.
제2도는 종래의 로타(10)의 구조를 보인 예시도 이며, 상기 로타(10)는 규소강판을 적층시킨 후 스쿠(SKEW)작업을 실시하여 규소강판 적층부(11)의 형상을 완료한 후 알루미늄외피(12) 즉 알루미늄으로 다이케스팅(DIE CASTING)을 실시하며 샤프트(9)가 강한 결합력으로 스테이킹(STAKIGN)되어진다.2 is an exemplary view showing the structure of a conventional rota 10, the rota 10 after the lamination of the silicon steel sheet to perform the SKEW (SKEW) work to complete the shape of the silicon steel sheet lamination 11 Die casting (DIE CASTING) is made of aluminum sheath 12, that is, aluminum, and the shaft 9 is staked with strong bonding force.
이와 같은 구조로 된 로타(10)는 다음의 문제가 단점으로 지적된다.Rota 10 having such a structure is pointed out as a disadvantage of the following problem.
규소강판 적층부(11)의 외측이 전기 및 열전도가 구리보다 휠씬 낮은 알루미늄으로 씌워져 있기 때문에 모타의 효율이 낮고, 상기 알루미늄은 물과 접촉될 경우 방식 특성이 불량하여 쉽게 부식된다.Since the outside of the silicon steel laminate 11 is covered with aluminum, which is much lower in electrical and thermal conductivity than copper, the efficiency of the motor is low, and when the aluminum is in contact with water, the corrosion resistance is poor due to poor corrosion resistance.
이와 같이 알루미늄외피(12)가 부식되면 부식부위가 스테이터캔(13)에 까지 전이될 우려가 있고, 상기 스테이터캔(13)이 부식되면 방수 효과는 완전히 떨어져 버린다.As such, when the aluminum shell 12 is corroded, the corrosion portion may be transferred to the stator can 13, and when the stator can 13 is corroded, the waterproofing effect is completely lost.
본 발명은 상기와 같은 문제를 해소할 수 있는 상기 로타의 제조방법을 제조하는데 그 목적이 있다.It is an object of the present invention to manufacture a method for producing a rota that can solve the above problems.
본 발명의 목적은 모타의 효율을 향상시킬 수 있는 로타를 제공하며, 본 발명의 또 다른 목적은 방수성이 뛰어난 로타를 제공하는데 있다.An object of the present invention is to provide a rotor that can improve the efficiency of the motor, another object of the present invention is to provide a rotor having excellent waterproof.
본 발명의 또다른 목적은 복잡하지 않으면서도 효율이 향상되고 방수성이 뛰어난 로타의 제조방법을 제공하는데 있다.Still another object of the present invention is to provide a method for manufacturing rota, which is not complicated and has improved efficiency and excellent waterproofness.
본 발명은 모타의 효율을 향상시키기 위하여 규소강판 적층부의 상하부에 동판(COPPER PLATE)를 적층하는 특징이 있다.The present invention has a feature of laminating a copper plate (COPPER PLATE) on the upper and lower parts of the silicon steel sheet laminated portion in order to improve the efficiency of the motor.
본 발명의 또 다른 특징은 은납링을 고주파용접에 의해 브레이징부로 형성시키는 것이다.Another feature of the present invention is to form the silver solder ring into the brazing portion by high frequency welding.
본 발명의 상기 및 기타 목적은,The above and other objects of the present invention,
① 규소강판을 프레싱(PRESSIGN)하여 원하는 크기(SIZE)로 만들고 프레싱된 규소강판을 62층으로 적층시키는 단계.① Pressing the silicon steel sheet (PRESSIGN) to the desired size (SIZE) and laminating the pressed silicon steel sheet in 62 layers.
② 규소강판 적층부의 상하측에 동일형상으로 된 강판(COPPER PLATE)을 적층시키는 단계.② Laminating the steel plate (COPPER PLATE) of the same shape on the upper and lower sides of the silicon steel sheet lamination.
③ 동판이 적층된 규소강판 적층부에 18개의 동바를 억지 끼움하여 로타의 외형을 완성시키는 단계.③ Completion of the appearance of the rotor by forcibly fitting 18 copper bars to the laminated silicon steel sheet lamination.
④ 한 슬롯(1 SLOT)으로 스쿠(SKEW)를 실시한 후 적정사이즈의 스테인레스튜브(STAIN LESS TUBE)를 로타의 외부에 억지 끼움하는 단계.④ Squeeze into one slot and insert a stainless steel tube of appropriate size to the outside of the rotor.
⑤ 상기 제품의 상하부에 은냅링(BRAGING RING)을 놓고 고주파용접에 의해 상기 은납링을 브레이징(BRAGING) 하는 단계에 의해 달성된다.⑤ It is achieved by brazing the silver solder ring by placing high frequency welding on top and bottom of the product.
본 발명은 상기와 같이 복잡하지 않는 단계로 이루어지며 모타의 효율을 향상시킬 수 있고 방수성이 우수한 로타를 제공할 수 있다.The present invention is composed of the steps that are not complicated as described above can improve the efficiency of the motor and can provide a rota excellent waterproof.
이하 본 발명을 보다 상세히 설명한다.Hereinafter, the present invention will be described in more detail.
통상적으로 평판상으로 되어 있는 규소강판을 통상의 프레스기에 의해 원판형으로 타발하여 형성시키며 통상적으로 0.5㎜ 두께의 규소강판이 사용된다.Usually, a silicon steel sheet having a flat plate is punched out in a disk shape by a conventional press, and a silicon steel sheet having a thickness of 0.5 mm is usually used.
상기 규소강판은 종래의 로타에서도 적용되고 있는 통상의 규소강판이다.The said silicon steel sheet is a normal silicon steel plate applied also to the conventional rotor.
상기 원판상으로 타발하여 성형할 때 중앙에는 샤프트(9)를 삽입할 수 있는 구멍과 차후에서 설명되는 동바를 삽입할 수 있는 18개의 구멍이 원형으로 통공된다.When punching and shaping into the disc, a hole through which a shaft 9 can be inserted and an 18 hole through which a copper bar described later will be inserted are circularly formed in the center.
상기 규소강판은 적절한 높이 층으로 적층되며 상기 캔드형 펌프에 적용되는 로타는 62층으로 적층시켜 규소강판 적층부(11)로 형성된다.The silicon steel sheet is laminated in an appropriate height layer, and the rotor applied to the canned pump is formed of a silicon steel sheet lamination part 11 by laminating in 62 layers.
상기 규소강판적층부(11)의 상하측에는 구리플레이트(COPPER PLATE)가 연접되며, 상기 구리플레이트(23)는 다소 두꺼운 형태로 된다. 구리플레이트(23)를 포함한 규소강판적층부(11)의 외측에는 스테인레스튜브(STAINLESS TUBE : SUS304)가 억지끼움된다. 상기 스테인레스튜브(21)는 내식성이 우수하여 부식현상이 방지된다. 상기 스테인레스튜브(21)는 0.15∼0.35㎜으 두께를 유지하며 바람직하기로는 0.20∼0.30㎜ 더욱 바람직하기로는 0.22∼0.28㎜이다.Copper plates (COPPER PLATE) are connected to the upper and lower sides of the silicon steel laminate portion 11, the copper plate 23 is a rather thick form. On the outside of the silicon steel sheet laminated portion 11 including the copper plate 23, a stainless tube (STAINLESS TUBE: SUS304) is fitted. The stainless tube 21 is excellent in corrosion resistance to prevent corrosion. The stainless tube 21 has a thickness of 0.15 to 0.35 mm, preferably 0.20 to 0.30 mm, more preferably 0.22 to 0.28 mm.
상기 스테인레스튜브(21)의 상하단은 내측으로 절곡되어 내향경사부로 된다.Upper and lower ends of the stainless tube 21 are bent inward to form an inwardly inclined portion.
스테인레스튜부(21)가 억지끼움된 로타(20)의 상하측에 은납링(26)을 안치하여 고주파용접장치에 장착된다.The stainless steel tubing 21 is mounted on the high frequency welding device by placing the silver solder ring 26 on the upper and lower sides of the rotor 20 in which the stainless tubing 21 is fitted.
상기 로타(20)는 그 상하측에 압착치구(28)(29)가 위치되며 외측으로는 고주파발생코일(27)이 구비된다. 상기 고주파발생코일(27)은 통상 구리코일이며 고온을 발생시켜 은납링(26)을 용융시켜 은납브레이징(BRAGING)부(25)로 하며, 상기 열을 전도받은 압착치구(28)(29)에 의해 구리플레이트도 적정하게 용융된 상태에서 압착치구(28)(29)를 분리시키는 것에 의해 내측 공간이 외향으로 약간 돌설되는 만곡접착부(24)가 형성된다. 상기 고주파발생코일(27)에서 발생되는 열기는 700∼1000℃의 고온이 바람직하며 더욱 바람직하기로는 800∼900℃로 유지되는 것이다.Rota 20 is the compression jig 28, 29 is located on the upper and lower sides and the high frequency generating coil 27 is provided on the outside. The high frequency generating coil 27 is a copper coil and generates a high temperature to melt the silver solder ring 26 to form a silver brazing portion 25, and to the crimping jig 28 and 29 that conducts the heat. By separating the crimping fixtures 28 and 29 in a state where the copper plate is also properly melted, a curved adhesive portion 24 is formed in which the inner space slightly protrudes outward. The heat generated by the high frequency generating coil 27 is preferably a high temperature of 700 to 1000 ℃, more preferably maintained at 800 to 900 ℃.
다음의 실시예는 본 발명을 구체적인 설명으로 나타낸 것이다.The following examples illustrate the invention by specific description.
그러나 본 발명은 다음의 실시예에 설정된 특정세부사항에 한정되지는 않는다.However, the present invention is not limited to the specific details set in the following embodiments.
[실시예]EXAMPLE
(1) 0.5㎜ 두께의 규소강판을 프레싱(PRESSING)하여 원하는 크기(SIZE)로 타발하고 파발된 규소강판을 62층으로 적층시켜 규소강판 적층부(11)를 형성한다.(1) The silicon steel sheet laminated part 11 is formed by pressing a silicon steel sheet having a thickness of 0.5 mm and punching it to a desired size and stacking the broken silicon steel sheet in 62 layers.
(2) 상기 규정강판적층부(11)의 상하측에 동일한 모양으로 된 구리플레이트(COPPER PLATE)을 일체로 접측시킨다.(2) Copper plates (COPPER PLATE) of the same shape are integrally brought into contact with the upper and lower sides of the prescribed steel sheet laminated portion 11.
(3) 구리플레이트(23)가 접층된 규소강판적층부(11)에 18개의 동바를 통상의 억지 끼움하여 로타의 외형을 완성시킨다.(3) 18 copper bars are normally inserted into the silicon steel sheet laminated portion 11 on which the copper plate 23 is laminated to complete the outer appearance of the rotor.
(4) 상기 외형상의 로타에 스쿠(SKEW)를 실시한 후 스테인레스튜브(21)를 억지 끼움하여 고정시킨다.(4) After performing SKEW on the rota of the outer shape, the stainless tube 21 is clamped and fixed.
(5) 스테인레스튜브(21)가 억지 끼움된 로타의 상하측에 은납링(BRAGING RING : 26)을 안치시키고 통상의 고주파용접장치에 의해 상기 은납링(26)을 용융시켜 은납브레이징부(25)로 형성하여 줌으로써 소정의 로타(20)를 얻을 수 있다.(5) A silver brazing ring (26) is placed on the upper and lower sides of the rotor where the stainless tube (21) is forcibly inserted, and the silver brazing ring (26) is melted by a normal high frequency welding device. The predetermined Rota 20 can be obtained by forming a.
상기 실시예의 결과 상.하 구리플레이트(COPPER PLATE)로 탠드링을 실시하여 모타의 효율이 향상됨을 알 수 있었고, 연신 가공성이 우수한 동판을 사용하므로 샤프트압입후 컬킹(CAULKING) 작업시 압착의 효과가 우수하였으며, 로타의 외면에 내식성이 우수한 스테인레스 스틸튜브로 완전히 감싹으로써 방수효과와 부식방지효과가 크게 향상됨을 알 수 있었다.As a result of the above embodiment, it was found that the efficiency of the motor was improved by performing a standing ring with upper and lower copper plates (COPPER PLATE). It was excellent, and it was found that the stainless steel tube with excellent corrosion resistance on the outer surface of Rota was completely wrapped to improve the waterproof effect and the corrosion prevention effect.
특히 스테인레스튜브와 동판부 틈새 및 동바(COPPER BARR)와의 용접은 세 금 속의 용접이 모두 가능한 은납을 사용함으로써 브레이징(BRAGING)이 가능하도록 하였고, 고주파용착방법에 의해 SEALING 효과를 완벽하게 얻을 수 있어 물의 침입이 최대한 억제되므로 부식발생 또한 방지할 수 있다.In particular, the welding of stainless tube, copper plate gap and copper barr is made of brazing by using silver solder that can be welded in all metals, and the sealing effect is perfectly obtained by high frequency welding method. Intrusion is suppressed as much as possible to prevent the occurrence of corrosion.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950022069A KR0154234B1 (en) | 1995-07-25 | 1995-07-25 | Rotor manufacturing method of canned pump using high frequency welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950022069A KR0154234B1 (en) | 1995-07-25 | 1995-07-25 | Rotor manufacturing method of canned pump using high frequency welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970008782A KR970008782A (en) | 1997-02-24 |
| KR0154234B1 true KR0154234B1 (en) | 1998-12-15 |
Family
ID=19421531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950022069A KR0154234B1 (en) | 1995-07-25 | 1995-07-25 | Rotor manufacturing method of canned pump using high frequency welding |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0154234B1 (en) |
-
1995
- 1995-07-25 KR KR1019950022069A patent/KR0154234B1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR970008782A (en) | 1997-02-24 |
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