WO2003056593A1 - Components of thermostatic units and laser welding method for producing the components - Google Patents
Components of thermostatic units and laser welding method for producing the components Download PDFInfo
- Publication number
- WO2003056593A1 WO2003056593A1 PCT/EP2002/014404 EP0214404W WO03056593A1 WO 2003056593 A1 WO2003056593 A1 WO 2003056593A1 EP 0214404 W EP0214404 W EP 0214404W WO 03056593 A1 WO03056593 A1 WO 03056593A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- components
- face
- voltage circuit
- low
- circuit breakers
- Prior art date
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
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/244—Overlap seam 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
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/28—Seam welding of curved planar seams
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H2011/0087—Welding switch parts by use of a laser beam
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H2037/525—Details of manufacturing of the bimetals, e.g. connection to non bimetallic elements or insulating coatings
Definitions
- the present invention relates to components for thermostatic units (of the kind used in thermostatic systems with a bimetallic element for environments or technical systems or in thermal protection relays for low-voltage circuit breakers), particularly to bimetallic elements and their connections to other components of said thermostatic units, and to a method for producing them.
- the present invention relates to a method for joining the bimetallic elements to other components of the thermostatic units by means of a laser welding process.
- the bimetallic element can generally be joined to the other components of thermostatic units, for example braids or terminal connection elements of a thermostat or the moving contacts of a circuit breaker, by mechanical coupling or by braze welding.
- the mechanical joining of said bimetallic elements is performed traditionally by using rivets, nails, pressure-based systems or similar joining systems.
- this method provides an efficient joining system, it has drawbacks.
- electrical conductivity proximate to the contact points is not ideal and can vary among parts.
- the mechanical joining operation still requires a larger number of parts (for example rivets or nails) than strictly required for the functionality of the thermostatic unit, thus introducing complications in the assembly process and entailing in any case an increase in production costs.
- the bimetallic element and the other components of the thermostatic units can be joined by virtue of conventional braze welding processes.
- thermostatic units that have a uniform behavior and can be manufactured efficiently. It is also evident that the current art needs to have an efficient method for joining components of thermostatic systems and thermal relays for low-voltage circuit breakers and particularly for joining bimetallic elements to the other components of the corresponding thermostatic units.
- the aim of the present invention is to provide components of thermostatic units that can be manufactured efficiently and have a uniform behavior.
- an object of the present invention is to provide a method for joining components of thermostatic units, and particularly bimetallic elements to the other components of thermostatic systems and thermal relays for low-voltage circuit breakers that does not entail metallic joining systems.
- Another object of the present invention is to provide a method for joining components of thermostatic systems and thermal relays for low- voltage circuit breakers and particularly bimetallic elements to the other components of thermostatic systems and thermal relays for low-voltage circuit breakers that has a modest cost and is economically competitive.
- a method for joining components of thermostatic units said components being constituted by at least one bimetallic element constituted by a lamina with a first face and a second face and at least one connection element that has a substantially flat end part with a third face and a fourth face, characterized in that it comprises the steps that consist in: ⁇ overlapping and coupling the end part of the first face of said bimetallic element with respect to the third face of the end part of said connection element; « subjecting the end part of the second face of said bimetallic element to the welding action of laser means to provide a weld between said bimetallic element and said connection element.
- the bimetallic element is designated by the reference numeral 1.
- Said element is constituted by a lamina with a first face 10 and a second face 20.
- a connection element for example the connection of a thermostatic system or relay, is designated by the reference numeral 2.
- the connection element 2 has a flat end part with a third face 30 and a fourth face 40.
- the end part of the first face 10 of the bimetallic element is superimposed and coupled to the third face 30 of the end part of the connection element.
- the end part of the second face 20 of the bimetallic element is subjected to the welding action of laser means 50, so as to provide a weld between the bimetallic element and said connection element.
- the laser weld is not a spot weld but a continuous weld.
- the laser means 50 scan the second face 20 of the bimetallic element according to a predefined path. It is evident to the person skilled in the art that said scan can be performed by virtue of a relative movement of the laser means with respect to the components to be welded during the welding operation. In practice, said relative movement can be performed by keeping the components to be welded motionless and moving the laser means, or by keeping the laser means motionless and moving the components to be welded, or by moving both.
- said scan according to a preset path follows a curved profile, as shown in the figure.
- the speed, power, angle of incidence, frequency, amplitude and other physical characteristics of the scanning beam can be chosen and modulated according to the characteristics of the elements to be welded, such as for example their chemical nature or their thickness.
- a solid-state laser for example a Nd-crystal laser.
- the characteristics of use of the laser such as for example the frequency, power and angle of incidence, can be chosen and modulated as a function of the characteristics of the elements to be welded and of the results to be obtained.
- the end part of the connecting braids must be machined and shaped appropriately so as to allow coupling to one face of the bimetallic element and its welding thereto.
- the method according to the invention solves the problems of the known art and has many advantages over it.
- the use of laser means allows to avoid applications of heat that would be critical and damaging for the bimetallic element.
- the efficiency and reproducibility from part to part of the method according to the invention are greater than those of the methods of the known art, thus reducing the number of rejects and substandard parts and increasing the overall economy of the production process.
- the method according to the invention it is therefore possible to obtain components of thermostatic systems and thermal relays for low-voltage circuit breakers that have improved characteristics with respect to the components of the known art.
- These components like the devices (for example circuit breakers) that comprise them, constitute an additional aspect of the present invention.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Laser Beam Processing (AREA)
- Manufacture Of Switches (AREA)
- Thermally Actuated Switches (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60231146T DE60231146D1 (en) | 2001-12-28 | 2002-12-17 | COMPONENTS OF A THERMOSTATIC UNIT AND LASER WELDING METHOD FOR THEIR PRODUCTION |
EP02798341A EP1459342B1 (en) | 2001-12-28 | 2002-12-17 | Components of thermostatic units and laser welding method for producing the components |
AU2002363877A AU2002363877A1 (en) | 2001-12-28 | 2002-12-17 | Components of thermostatic units and laser welding method for producing the components |
US10/500,367 US7253375B2 (en) | 2001-12-28 | 2002-12-17 | Components of thermostatic units and laser welding method for producing the components |
JP2003557019A JP2005513748A (en) | 2001-12-28 | 2002-12-17 | Component of constant temperature unit and laser welding method for manufacturing the component |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI2001A002836 | 2001-12-28 | ||
IT2001MI002836A ITMI20012836A1 (en) | 2001-12-28 | 2001-12-28 | THERMOSTATIC UNIT COMPONENTS AND LASER WELDING METHOD FOR THEIR OBTAINING |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003056593A1 true WO2003056593A1 (en) | 2003-07-10 |
Family
ID=11448771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/014404 WO2003056593A1 (en) | 2001-12-28 | 2002-12-17 | Components of thermostatic units and laser welding method for producing the components |
Country Status (11)
Country | Link |
---|---|
US (1) | US7253375B2 (en) |
EP (1) | EP1459342B1 (en) |
JP (1) | JP2005513748A (en) |
CN (1) | CN100338707C (en) |
AT (1) | ATE422705T1 (en) |
AU (1) | AU2002363877A1 (en) |
DE (1) | DE60231146D1 (en) |
ES (1) | ES2321700T3 (en) |
IT (1) | ITMI20012836A1 (en) |
RU (1) | RU2304320C2 (en) |
WO (1) | WO2003056593A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1025340C2 (en) * | 2004-01-28 | 2005-08-01 | Capax B V | Switch has laser welding or soldering connections and controls electric motor and contains metal components which are connected by smelting with energy required for smelting being provided by laser |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090038150A1 (en) * | 2006-03-07 | 2009-02-12 | Daikin Industries, Ltd. | Method for producing compressor, and compressor |
JP5633687B2 (en) | 2010-10-25 | 2014-12-03 | スズキ株式会社 | Laser lap welding method for galvanized steel plate parts |
JP5630699B2 (en) * | 2010-10-25 | 2014-11-26 | スズキ株式会社 | Laser lap welding method for galvanized steel plate parts |
JP5880032B2 (en) * | 2011-12-27 | 2016-03-08 | トヨタ自動車株式会社 | Laser welding method |
JP6051595B2 (en) * | 2012-05-21 | 2016-12-27 | セイコーエプソン株式会社 | cartridge |
EP2754530B1 (en) * | 2013-01-11 | 2017-03-29 | Siemens Aktiengesellschaft | Method for remelting cracks |
WO2017035729A1 (en) * | 2015-08-31 | 2017-03-09 | GM Global Technology Operations LLC | Method for laser welding aluminum workpieces |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4661677A (en) * | 1984-08-20 | 1987-04-28 | Fiat Auto S.P.A. | Deep penetration laser welding of sheet metal |
EP0327320A1 (en) * | 1988-02-02 | 1989-08-09 | Raycon Corporation | Method for welding galvanised material |
US5276298A (en) * | 1992-08-31 | 1994-01-04 | General Electric Company | Apparatus and method for laser joining bimetallic materials to circuit breaker terminals and braid extensions |
US5389761A (en) * | 1993-09-17 | 1995-02-14 | General Motors Corporation | Method and apparatus for cleaning metal pieces prior to resistive seam welding or laser lap seam welding |
US6274843B1 (en) * | 1998-05-18 | 2001-08-14 | Alstom Holdings | Installation for laser welding of overlapping parts |
JP2002197954A (en) * | 2000-12-25 | 2002-07-12 | Alps Electric Co Ltd | Thermal switch |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3648014A (en) * | 1969-07-15 | 1972-03-07 | Gen Electric | Method of joining copper braid to aluminum and the joint formed thereby |
DE2528457A1 (en) * | 1975-06-26 | 1977-01-20 | Metallgesellschaft Ag | HIGH TEMPERATURE THERMOBIMETAL |
JPS54116356A (en) * | 1978-03-03 | 1979-09-10 | Hitachi Ltd | Welding method by laser |
JP2581574B2 (en) * | 1987-11-16 | 1997-02-12 | 三菱電機株式会社 | Laser processing method and apparatus |
US5093988A (en) * | 1991-01-24 | 1992-03-10 | Kohler Co. | Method for attaching a flexible connector |
FR2683675B1 (en) * | 1991-11-13 | 1993-12-31 | Merlin Gerin | METHOD AND DEVICE FOR ADJUSTING A TECHNICAL TRIGGER WITH BILAME. |
US5268555A (en) * | 1992-08-31 | 1993-12-07 | General Electric Company | Apparatus and method for laser joining 218 bimetal to molded case circuit breaker (MCCB) hooks and terminals |
FR2746542B1 (en) * | 1996-03-20 | 1998-04-24 | Schneider Electric Sa | DIFFERENTIAL THERMAL TRIGGER IN BILAMES |
JP2001068171A (en) * | 1999-08-30 | 2001-03-16 | Sumitomo Wiring Syst Ltd | Circuit conductor jointing structure of junction block |
-
2001
- 2001-12-28 IT IT2001MI002836A patent/ITMI20012836A1/en unknown
-
2002
- 2002-12-17 AU AU2002363877A patent/AU2002363877A1/en not_active Abandoned
- 2002-12-17 DE DE60231146T patent/DE60231146D1/en not_active Expired - Lifetime
- 2002-12-17 CN CNB028261712A patent/CN100338707C/en not_active Expired - Fee Related
- 2002-12-17 JP JP2003557019A patent/JP2005513748A/en active Pending
- 2002-12-17 EP EP02798341A patent/EP1459342B1/en not_active Revoked
- 2002-12-17 AT AT02798341T patent/ATE422705T1/en not_active IP Right Cessation
- 2002-12-17 US US10/500,367 patent/US7253375B2/en not_active Expired - Lifetime
- 2002-12-17 ES ES02798341T patent/ES2321700T3/en not_active Expired - Lifetime
- 2002-12-17 WO PCT/EP2002/014404 patent/WO2003056593A1/en active Application Filing
- 2002-12-17 RU RU2004123204/09A patent/RU2304320C2/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4661677A (en) * | 1984-08-20 | 1987-04-28 | Fiat Auto S.P.A. | Deep penetration laser welding of sheet metal |
EP0327320A1 (en) * | 1988-02-02 | 1989-08-09 | Raycon Corporation | Method for welding galvanised material |
US5276298A (en) * | 1992-08-31 | 1994-01-04 | General Electric Company | Apparatus and method for laser joining bimetallic materials to circuit breaker terminals and braid extensions |
US5389761A (en) * | 1993-09-17 | 1995-02-14 | General Motors Corporation | Method and apparatus for cleaning metal pieces prior to resistive seam welding or laser lap seam welding |
US6274843B1 (en) * | 1998-05-18 | 2001-08-14 | Alstom Holdings | Installation for laser welding of overlapping parts |
JP2002197954A (en) * | 2000-12-25 | 2002-07-12 | Alps Electric Co Ltd | Thermal switch |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 2002, no. 11 6 November 2002 (2002-11-06) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1025340C2 (en) * | 2004-01-28 | 2005-08-01 | Capax B V | Switch has laser welding or soldering connections and controls electric motor and contains metal components which are connected by smelting with energy required for smelting being provided by laser |
Also Published As
Publication number | Publication date |
---|---|
ATE422705T1 (en) | 2009-02-15 |
JP2005513748A (en) | 2005-05-12 |
DE60231146D1 (en) | 2009-03-26 |
US20050011869A1 (en) | 2005-01-20 |
EP1459342B1 (en) | 2009-02-11 |
ES2321700T3 (en) | 2009-06-10 |
AU2002363877A1 (en) | 2003-07-15 |
ITMI20012836A1 (en) | 2003-06-28 |
CN1608302A (en) | 2005-04-20 |
CN100338707C (en) | 2007-09-19 |
US7253375B2 (en) | 2007-08-07 |
RU2004123204A (en) | 2005-09-10 |
RU2304320C2 (en) | 2007-08-10 |
EP1459342A1 (en) | 2004-09-22 |
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