WO2011115591A1 - Induction heater - Google Patents
Induction heater Download PDFInfo
- Publication number
- WO2011115591A1 WO2011115591A1 PCT/TH2010/000012 TH2010000012W WO2011115591A1 WO 2011115591 A1 WO2011115591 A1 WO 2011115591A1 TH 2010000012 W TH2010000012 W TH 2010000012W WO 2011115591 A1 WO2011115591 A1 WO 2011115591A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- induction
- heater
- metal
- welding process
- induction heater
- 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
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/015—Butt 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
- B23K23/00—Alumino-thermic welding
-
- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
-
- 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
- B23K2101/26—Railway- or like rails
-
- 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
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Definitions
- the present invention relates generally to welding apparatus and methods, and more particularly to apparatus and methods for exothermic welding without martensite such as in railway signaling bond.
- the lenticular (lens-shaped) crystal grains When viewed in cross-section, the lenticular (lens-shaped) crystal grains appear acicular (needle-shaped). Martensite can be affected to the rail with increasing risk of cracking and brittle, so it becomes to a critically trouble on rail.
- FIG.l is a perspective view of the induction heater which is composed of 2 parts, i.e., controller, heater;
- FIG.2 is an enlarged fragmentary view of the controller
- FIG.3 is an enlarged fragmentary view of the heating part
- FIG.4 shows the induction heater control circuit thereof.
- the mainly purpose of this invention is to reduce risk in railway cracking which possibly occurred in Heat Affected Zone (HAZ) around welding area.
- HAZ Heat Affected Zone
- the rail will be increased of hardness and brittleness in structure and lowing stretch for rail. Because of this, we need to control the heating and cooling thoroughly by the induction heater which consists of 2 parts: (1) Controller controls properly temperature and shows the status of each process and (2) Induction heater generates thermal energy smoothly.
- FIG.l is a perspective view of the present invention which is composed of 2 parts, i.e., controller and heater as shown an enlarged fragmentary in FIG.2 and 3.
- FIG.2 and 4 show the details of the control part of the invention.
- the controller consists of 9 control buttons: (1) On/Off button, 3 alert light to show status, i.e., (2) Green lamp lights, meanwhile the welding process finished, (3) Yellow lamp lights, meanwhile the ignition is ready, (4) Red lamp lights, meanwhile it is now in process, (5) Buzzer is used to urge before welding process, (6) ,(7) and (8) Timers and (9) Dimmer is used to adjust properly voltage.
- the invention includes a housing (11) made of metal and coated on an inner surface thereof with a ceramic fiber insulator (14), so that the heat induction to the outside is prevented.
- the AF coil (10) obtains electricity energy from supply and transforms to thermal energy in order to provide properly heat on railway via the wire duct (13).
- the induction heater has a fixing support (12) installed at the base of the device and made of metal.
- the mainly purpose of this invention is to reduce risk in railway cracking which possibly occurred in Heat Affected Zone (HAZ) around welding area.
- HAZ Heat Affected Zone
Abstract
An induction heater includes a housing (11) made of metal and coated on an inner surface thereof with a ceramic fiber insulator (14), so that the induction heat to the outside is prevented. The induction heater has a fixing support (12) made of metal installed at the base of the heater. The heater assorts with the control part for showing and urging the status of the welding process. Exothermic bonding is a popular method of railway signaling bond. The molecular chemical reaction generates a superheat with molten metal. The induction heater provides proper heat and prevents thermal energy induction on railway. So the martensite in welding process which can affect to the rail with increasing risk of cracking and brittle can be prevented.
Description
INDUCTION HEATER
BACKGROUND OF THE INVENTION FIELD OF THE INVENTION
The present invention relates generally to welding apparatus and methods, and more particularly to apparatus and methods for exothermic welding without martensite such as in railway signaling bond.
DESCRIPTION OF THE PRIOR ART
Welding by exothermic chemical reaction was originally devised in about 1897. In a typical process, the resultant of an exothermic chemical reaction is achieved superheated, molten metal is about 2600°C that the contacting surface layers of the substrate or joint melt becomes homogeneous metal.Railway signaling is a system used to control railway traffic safely, essentially to prevent trains from colliding. Exothermic bonding is one of the most popular methods of railway signaling bond. The molecular chemical reaction generates a superheat with molten metal. In welding process, the martensite is formed by rapid cooling, quenching, of austenite which traps carbon atoms that have not got enough time to diffuse out of the crystal structure. When viewed in cross-section, the lenticular (lens-shaped) crystal grains appear acicular (needle-shaped). Martensite can be affected to the rail with increasing risk of cracking and brittle, so it becomes to a critically trouble on rail.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects features and advantages of the present invention will become more apparent from the following detail description taken in conjunction with the accompanying drawing, in which:
FIG.l is a perspective view of the induction heater which is composed of 2 parts, i.e., controller, heater;
FIG.2 is an enlarged fragmentary view of the controller;
FIG.3 is an enlarged fragmentary view of the heating part; and
FIG.4 shows the induction heater control circuit thereof.
SUMMARY OF THE INVENTION
The mainly purpose of this invention is to reduce risk in railway cracking which possibly occurred in Heat Affected Zone (HAZ) around welding area. During the process of welding, in order to transformation to martensite in railway's microstructure, the rail will be increased of hardness and brittleness in structure and lowing stretch for rail. Because of this, we need to control the heating and cooling thoroughly by the induction heater which consists of 2 parts: (1) Controller controls properly temperature and shows the status of each process and (2) Induction heater generates thermal energy smoothly.
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
FIG.l is a perspective view of the present invention which is composed of 2 parts, i.e., controller and heater as shown an enlarged fragmentary in FIG.2 and 3.
FIG.2 and 4 show the details of the control part of the invention. The controller consists of 9 control buttons: (1) On/Off button, 3 alert light to show status, i.e., (2) Green lamp lights, meanwhile the welding process finished, (3) Yellow lamp lights, meanwhile the ignition is ready, (4) Red lamp lights, meanwhile it is now in process, (5) Buzzer is used to urge before welding process, (6) ,(7) and (8) Timers and (9) Dimmer is used to adjust properly voltage.
As shown in FIG.3, the invention includes a housing (11) made of metal and coated on an inner surface thereof with a ceramic fiber insulator (14), so that the heat induction to the outside is prevented. The AF coil (10) obtains electricity energy from supply and transforms to thermal energy in order to provide properly heat on railway via the wire duct (13). The induction heater has a fixing support (12) installed at the base of the device and made of metal.
The mainly purpose of this invention is to reduce risk in railway cracking which possibly occurred in Heat Affected Zone (HAZ) around welding area. During the process of welding, HAZ will be affected with high temperature in welding and quenching or rapidly cooling when welding process has been finished. That is the significant reason why railway microstructure will be
transforming to Martensite and be caused of increasing of hardness and brittleness in structure and lowing stretch for rail. Because of this, we need to control the heating and cooling thoroughly.
Claims
1. Controller consists of control buttons: (1) On/Off button, 3 alert light to show status, i.e., (2) Green lamp lights, meanwhile the welding process finished, (3) Yellow lamp lights, meanwhile the ignition is ready, (4) Red lamp lights, meanwhile it is now in process, (5) Buzzer is used to urge before welding process, (6) ,(7) and (8) Timers and (9) Dimmer is used to adjust properly voltage.
2. Heater includes a housing (11) made of metal and coated on an inner surface thereof with a ceramic fiber insulator (14), so that the heat induction to the outside is prevented. The AF coil (10) obtains electricity energy from supply and transforms to thermal energy in order to provide properly heat on railway via the wire duct (13). The induction heater has a fixing support (12) installed at the base of the device and made of metal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TH1001000430A TH1001000430A (en) | 2010-03-17 | The patent has not yet been announced. | |
| TH1001000430 | 2010-03-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011115591A1 true WO2011115591A1 (en) | 2011-09-22 |
Family
ID=45816036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TH2010/000012 WO2011115591A1 (en) | 2010-03-17 | 2010-03-23 | Induction heater |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2011115591A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797870A (en) * | 1980-12-09 | 1982-06-17 | Mitsubishi Electric Corp | Welding controller |
| CN85200739U (en) * | 1985-04-12 | 1986-02-05 | 吉林化学工业公司设计院 | No iron core explosion venting type frequency inductance is answered heater |
| CN2253264Y (en) * | 1996-04-12 | 1997-04-30 | 杨立国 | Power-saving protector for electric welder |
| CN201306827Y (en) * | 2008-11-25 | 2009-09-09 | 范警民 | Electric induction heater and heating device equipped therewith |
| CN101578021A (en) * | 2009-06-10 | 2009-11-11 | 无锡威华电焊机制造有限公司 | Remote control box of gas shield welding machine |
-
2010
- 2010-03-23 WO PCT/TH2010/000012 patent/WO2011115591A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797870A (en) * | 1980-12-09 | 1982-06-17 | Mitsubishi Electric Corp | Welding controller |
| CN85200739U (en) * | 1985-04-12 | 1986-02-05 | 吉林化学工业公司设计院 | No iron core explosion venting type frequency inductance is answered heater |
| CN2253264Y (en) * | 1996-04-12 | 1997-04-30 | 杨立国 | Power-saving protector for electric welder |
| CN201306827Y (en) * | 2008-11-25 | 2009-09-09 | 范警民 | Electric induction heater and heating device equipped therewith |
| CN101578021A (en) * | 2009-06-10 | 2009-11-11 | 无锡威华电焊机制造有限公司 | Remote control box of gas shield welding machine |
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