ES2045718T3 - Procedimiento para la fabricacion de unas valvulas selectoras de gas huecas para las maquinas de piston alternativo. - Google Patents
Procedimiento para la fabricacion de unas valvulas selectoras de gas huecas para las maquinas de piston alternativo.Info
- Publication number
- ES2045718T3 ES2045718T3 ES90121253T ES90121253T ES2045718T3 ES 2045718 T3 ES2045718 T3 ES 2045718T3 ES 90121253 T ES90121253 T ES 90121253T ES 90121253 T ES90121253 T ES 90121253T ES 2045718 T3 ES2045718 T3 ES 2045718T3
- Authority
- ES
- Spain
- Prior art keywords
- welding
- procedure
- manufacture
- hollow
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/206—Laser sealing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/0006—Electron-beam welding or cutting specially adapted for particular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K15/00—Electron-beam welding or cutting
- B23K15/0046—Welding
- B23K15/0086—Welding welding for purposes other than joining, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/34—Laser welding for purposes other than joining
- B23K26/342—Build-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
- B23K35/0244—Powders, particles or spheres; Preforms made therefrom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/32—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C
- B23K35/322—Selection of soldering or welding materials proper with the principal constituent melting at more than 1550 degrees C a Pt-group metal as principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K5/00—Gas flame welding
- B23K5/18—Gas flame welding for purposes other than joining parts, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
- B23P15/002—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings poppet valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/12—Cooling of valves
- F01L3/14—Cooling of valves by means of a liquid or solid coolant, e.g. sodium, in a closed chamber in a valve
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/003—Pistons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- Laser Beam Processing (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Valve Housings (AREA)
- Fluid-Driven Valves (AREA)
Abstract
LA INVENCION SE REFIERE A UN PROCEDIMIENTO PARA LA FABRICACION DE VALVULAS HUECAS DE INTERCAMBIO DE GASES, ESPECIALMENTE CON UN MEDIO REFRIGERANTE INTRODUCIDO EN EL VASTAGO HUECO DE LA VALVULA. EL HUECO DEL VASTAGO SE PRODUCE, PREFERENTEMENTE, MEDIANTE PERFORACION DESDE LA CABEZA DE LA VALVULA Y PUEDE, DADO EL CASO, SER CERRADO POR SOLDADURA, UNA VEZ INTRODUCIDO EL REFRIGERANTE. UNA PIEZA DELGADA DE RELLENO, INTRODUCIDA A PROFUNDIDAD DEFINIDA DENTRO DE LA PERFORACION, MANTIENE TRANSITORIAMENTE EL BAÑO DE FUSION DE LA SOLDADURA. EL PROCESO DE SOLDADURA PUEDE ORIGINAR COSTES FRENTE A OTROS PROCEDIMIENTOS DE CIERRE. EL PROCEDIMIENTO DE LA SOLDADURA SE LLEVA A CABO DE MODO QUE LA PIEZA A TRABAJAR NO ESTA COMPRENDIDA DENTRO DE UN CIRCUITO ELECTRICO ATRAVESADO POR LA ENERGIA DE LA SOLDADURA. A ESTE TIPO DE PROCEDIMIENTO CORRESPONDE LA SOLDADURA AUTOGENA, LA SOLDADURA POR RAYOS ELECTRONICOS O LA SOLDADURA POR LASER. CON ESTOS PROCEDIMIENTOS PUEDEN EVITARSE EFECTOS DE CANTOS.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3939348 | 1989-11-29 | ||
DE4024084A DE4024084A1 (de) | 1989-11-29 | 1990-07-28 | Verfahren zum herstellen von hohlen gaswechselventilen fuer hubkolbenmaschinen |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2045718T3 true ES2045718T3 (es) | 1994-01-16 |
Family
ID=25887463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES90121253T Expired - Lifetime ES2045718T3 (es) | 1989-11-29 | 1990-11-07 | Procedimiento para la fabricacion de unas valvulas selectoras de gas huecas para las maquinas de piston alternativo. |
Country Status (5)
Country | Link |
---|---|
US (1) | US5126530A (es) |
EP (1) | EP0429900B1 (es) |
JP (1) | JPH0686009B2 (es) |
DE (2) | DE4024084A1 (es) |
ES (1) | ES2045718T3 (es) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109434288A (zh) * | 2018-12-04 | 2019-03-08 | 上海交通大学 | 超快激光锥孔打孔装置及打孔工艺 |
CN110449737A (zh) * | 2019-08-19 | 2019-11-15 | 芜湖天弋能源科技有限公司 | 一种修复动力电池壳体和顶盖激光焊炸点的方法 |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5245155A (en) * | 1992-03-06 | 1993-09-14 | General Electric Company | Single point powder feed nozzle for use in laser welding |
DE19803294A1 (de) * | 1998-01-29 | 1999-08-05 | Mwp Mahle J Wizemann Pleuco Gm | Einen Hohlraum aufweisendes Gaswechselventil |
DE10256274A1 (de) * | 2001-12-27 | 2003-07-17 | Mahle Ventiltrieb Gmbh | Verfahren zur Herstellung eines Gaswechselventils eines Verbrennungsmotors |
WO2003100223A1 (de) * | 2002-05-28 | 2003-12-04 | Daimlerchrysler Ag | Verfahren zur herstellung eines gebauten ventils mit hohlschaft für hubkolbenmaschinen |
JP3925491B2 (ja) * | 2003-11-20 | 2007-06-06 | 株式会社デンソー | レーザ溶着方法、構造およびスロットルバルブ装置 |
GB2418166A (en) * | 2004-09-15 | 2006-03-22 | Rolls Royce Plc | Component fabrication using electron beam deposition welding |
JP2011179327A (ja) * | 2010-02-26 | 2011-09-15 | Mitsubishi Heavy Ind Ltd | 金属ナトリウム封入エンジンバルブの製造方法 |
CN102601507A (zh) * | 2012-03-22 | 2012-07-25 | 镇江维纳特气门有限公司 | 一种气门等离子堆焊焊接方法 |
BR102013021206A2 (pt) | 2012-12-11 | 2014-09-09 | Wärtsilä Schweiz AG | Válvula de troca de gás bem como método para fabricação de válvula de troca de gás |
DE102013210897A1 (de) * | 2013-06-11 | 2014-12-11 | Mahle International Gmbh | Verfahren zur Herstellung eines gebauten Hohlventils einer Brennkraftmaschine |
DE102013210899A1 (de) * | 2013-06-11 | 2014-12-11 | Mahle International Gmbh | Verfahren zur Herstellung eines gebauten Hohlventils |
DE102013218488A1 (de) * | 2013-09-16 | 2015-03-19 | Mahle International Gmbh | Hohlventil, insbesondere für eine Brennkraftmaschine |
WO2015075795A1 (ja) * | 2013-11-21 | 2015-05-28 | 日鍛バルブ株式会社 | 中空ポペットバルブの製造方法 |
KR101458189B1 (ko) * | 2014-01-02 | 2014-11-05 | 문명성 | 중공밸브 제조방법 |
CN105215570A (zh) * | 2014-06-24 | 2016-01-06 | 盐城环宇汽车零部件制造有限公司 | 一种平面密封新方法 |
DE102014225618A1 (de) * | 2014-12-11 | 2016-06-16 | Mahle International Gmbh | Verfahren zur Herstellung eines Hohlventils |
CN106077914B (zh) * | 2016-07-15 | 2019-07-09 | 南京国际船舶设备配件有限公司 | 一种船用低速机气阀盘底及其焊接工艺 |
CN106563863A (zh) * | 2016-10-20 | 2017-04-19 | 重庆跃进机械厂有限公司 | 中速机气阀阀面mig堆焊方法 |
CN108817716B (zh) * | 2018-09-18 | 2020-12-11 | 上海交通大学 | 一种适用于小规格孔内激光堆焊的送粉装置 |
CN109202365B (zh) * | 2018-11-12 | 2020-08-18 | 湖北秦鸿新材料股份有限公司 | 一种磨煤机辊套的在线堆焊修复方法 |
JP7325194B2 (ja) * | 2019-02-19 | 2023-08-14 | 三菱重工業株式会社 | 溶接物製造方法、溶接物製造システム及び溶接物 |
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US1628911A (en) * | 1926-11-05 | 1927-05-17 | George R Rich | Electrically-welded valve tappet |
GB471605A (en) * | 1935-08-17 | 1937-09-08 | Teves Kg Alfred | Improvements in or relating to hollow poppet valves |
GB489384A (en) * | 1937-02-03 | 1938-07-26 | Harold Ernest Gresham | Improvements in mushroom valves for internal combustion engines |
GB532184A (en) * | 1939-08-19 | 1941-01-20 | British Aero Components Ltd | Improvements in poppet valves and their manufacture |
US2440461A (en) * | 1944-04-22 | 1948-04-27 | Eaton Mfg Co | Method of sealing the stem of hollow valves |
FR917196A (fr) * | 1944-06-26 | 1946-12-27 | Thompson Prod Inc | Procédé de fabrication de soupapes creuses à soulèvement renfermant un agent de refroidissement tel que le sodium |
DE903017C (de) * | 1951-01-31 | 1954-02-01 | Sueddeutsche Lab G M B H | Herstellung kleiner Kugeln aus hochschmelzbaren Materialien |
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FR1533755A (fr) * | 1966-08-16 | 1968-07-19 | Jeol Ltd | Dispositif pour le réglage du point de traitement dans un appareil à faisceau électrique ou analogue |
DE1927613A1 (de) * | 1969-05-30 | 1970-12-03 | Essener Schweisselektroden Wer | Elektrisches Lichtbogenschweissverfahren |
US3699334A (en) * | 1969-06-16 | 1972-10-17 | Kollsman Instr Corp | Apparatus using a beam of positive ions for controlled erosion of surfaces |
DE1960331A1 (de) * | 1969-12-02 | 1971-06-03 | Porsche Kg | Kegelventil,insbesondere fuer Brennkraftmaschinen |
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US3644700A (en) * | 1969-12-15 | 1972-02-22 | Ibm | Method and apparatus for controlling an electron beam |
IT1046261B (it) * | 1973-07-11 | 1980-06-30 | Eaton Spa | Procedimento per la fabbricazione di valvole cave e valvole cosi ottenute per motori a combustione interna ed altre macchine in genere |
US3894271A (en) * | 1973-08-31 | 1975-07-08 | Ibm | Method and apparatus for aligning electron beams |
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US4406046A (en) * | 1979-09-08 | 1983-09-27 | Mtu Motoren- Und Turbinen-Union Munchen, Gmbh | Process for the production of a sodium-filled valve |
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US4789770A (en) * | 1987-07-15 | 1988-12-06 | Westinghouse Electric Corp. | Controlled depth laser drilling system |
-
1990
- 1990-07-28 DE DE4024084A patent/DE4024084A1/de active Granted
- 1990-11-07 ES ES90121253T patent/ES2045718T3/es not_active Expired - Lifetime
- 1990-11-07 EP EP90121253A patent/EP0429900B1/de not_active Expired - Lifetime
- 1990-11-07 DE DE9090121253T patent/DE59002302D1/de not_active Expired - Fee Related
- 1990-11-22 JP JP2315710A patent/JPH0686009B2/ja not_active Expired - Fee Related
- 1990-11-29 US US07/619,517 patent/US5126530A/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109434288A (zh) * | 2018-12-04 | 2019-03-08 | 上海交通大学 | 超快激光锥孔打孔装置及打孔工艺 |
CN110449737A (zh) * | 2019-08-19 | 2019-11-15 | 芜湖天弋能源科技有限公司 | 一种修复动力电池壳体和顶盖激光焊炸点的方法 |
Also Published As
Publication number | Publication date |
---|---|
EP0429900A2 (de) | 1991-06-05 |
DE4024084C2 (es) | 1992-02-27 |
US5126530A (en) | 1992-06-30 |
DE59002302D1 (de) | 1993-09-16 |
JPH0686009B2 (ja) | 1994-11-02 |
EP0429900A3 (en) | 1991-10-16 |
EP0429900B1 (de) | 1993-08-11 |
JPH03180272A (ja) | 1991-08-06 |
DE4024084A1 (de) | 1991-06-06 |
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