WO2021100173A1 - Dispositif de brasage et échangeur de chaleur - Google Patents

Dispositif de brasage et échangeur de chaleur Download PDF

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Publication number
WO2021100173A1
WO2021100173A1 PCT/JP2019/045629 JP2019045629W WO2021100173A1 WO 2021100173 A1 WO2021100173 A1 WO 2021100173A1 JP 2019045629 W JP2019045629 W JP 2019045629W WO 2021100173 A1 WO2021100173 A1 WO 2021100173A1
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WO
WIPO (PCT)
Prior art keywords
brazing
heating
pipe
shape measuring
diameter
Prior art date
Application number
PCT/JP2019/045629
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English (en)
Japanese (ja)
Inventor
計憲 足達
隆 金谷
洋輔 藤森
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2019/045629 priority Critical patent/WO2021100173A1/fr
Publication of WO2021100173A1 publication Critical patent/WO2021100173A1/fr

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    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering

Definitions

  • the present invention relates to a brazing device and a heat exchanger provided with a shape measuring device.
  • Patent Document 1 discloses a brazing device that uses a radiation thermometer to measure the timing of charging a brazing material into a brazing portion.
  • the brazing device of Patent Document 1 measures the infrared rays emitted from the heated brazing portion by using a radiation thermometer, and measures the temperature of the brazing portion.
  • the brazing device of Patent Document 1 attempts to measure an appropriate brazing timing by this.
  • the brazing device disclosed in Patent Document 1 measures the temperature of the brazing portion using a radiation thermometer. Therefore, in the brazing device of Patent Document 1, for example, when a burner is used when heating the brazing portion, the radiation thermometer may measure the infrared rays of the flame emitted from the burner in contact with the brazing portion. There is. In this case, the radiation thermometer shows a temperature higher than the temperature of the brazed portion. As described above, the measurement result of the radiation thermometer is easily influenced by factors other than the temperature of the brazed portion. Therefore, in the brazing device of Patent Document 1, there is a possibility that an error may occur in the measurement result of the temperature of the brazing portion.
  • the present invention has been made to solve the above problems, and provides a brazing device and a heat exchanger that accurately measure the temperature of a brazing portion.
  • the brazing device receives a heating device that heats a brazed portion to which a metal pipe is brazed, a light projecting unit that projects light onto the brazing portion, and light projected from the light projecting unit.
  • the pre-heating pipe diameter which is the pipe diameter of the metal pipe before the brazed part is heated
  • the heating pipe diameter which is the pipe diameter of the metal pipe when the brazed part is heated.
  • the calculation means calculates the heating temperature based on the difference between the diameter of the preheating pipe and the diameter of the heating pipe measured by the shape measuring device.
  • the pipe diameter of the brazed portion is unlikely to change in the brazing operation except that the brazed portion is heated. Therefore, the amount of change in the pipe diameter of the brazed portion due to heating and the amount of increase in the temperature of the brazed portion have a high correlation. Therefore, the brazing device can accurately measure the temperature of the brazing portion based on the difference between the diameter of the brazing portion before heating and the diameter of the heating pipe.
  • FIG. 1 It is a block diagram which shows the brazing apparatus 1 which concerns on Embodiment 1.
  • FIG. It is a block diagram which shows the shape measuring apparatus 12 which concerns on Embodiment 1.
  • FIG. It is a block diagram which shows the shape measuring apparatus 12 which concerns on Embodiment 1.
  • FIG. It is a block diagram which shows the shape measuring apparatus 12 which concerns on Embodiment 1.
  • FIG. It is a functional block diagram which shows the control device 13 which concerns on Embodiment 1.
  • FIG. It is a flowchart which shows the brazing procedure which concerns on Embodiment 1.
  • FIG. It is a block diagram which shows the shape measuring apparatus 212 of the brazing apparatus 201 which concerns on a comparative example.
  • FIG. 1 is a configuration diagram showing a brazing device 1 according to the first embodiment.
  • the brazing device 1 brazes the metal pipe 32 in the heat exchanger 2 having the heat exchanger main body 31 and the metal pipe 32.
  • the heat exchanger main body 31 constitutes the frame of the heat exchanger 2.
  • the heat exchanger main body 31 is placed on the carriage 4 when the metal pipe 32 is brazed.
  • the metal pipe 32 is a pipe through which the refrigerant flows, and is made of copper, for example.
  • the metal pipe 32 has a brazed portion 33.
  • the brazing portion 33 is a portion where the brazing material 3 is charged and applied.
  • the brazing device 1 includes a heating device 11, a shape measuring device 12, a control device 13, and a notification device 14.
  • the brazing device 1 illustrates the case where the metal pipe 32 of the heat exchanger 2 is brazed, but the brazing device 1 is for brazing the heat exchanger main body 31. It may be the one that brazes the metal pipe of another device.
  • the heating device 11 includes an arm 21 and a burner 22.
  • the arm 21 is installed in a work place where a burner 22 is connected to the tip and brazing is performed.
  • the arm 21 has a plurality of joint portions 28, and the angle of the burner 22 can be freely changed and fixed at an arbitrary angle.
  • the arm 21 is not limited to the above mode.
  • the brazing device 1 does not have to have the arm 21. In this case, the operator holds the burner 22 and brazes the brazing portion 33.
  • the burner 22 injects a flame onto the brazed portion 33 of the metal pipe 32 to heat the brazed portion 33.
  • the burner 22 can handle a brazed portion having a complicated shape while having a low equipment cost.
  • the heating device 11 does not heat the brazing portion 33 by the burner 22, but may heat the brazing portion 33 by irradiating, for example, near infrared rays.
  • the shape measuring device 12 includes a light emitting unit 23 and a light receiving unit 24, and the pre-heating pipe diameter, which is the pipe diameter of the metal pipe 32 before the brazing unit 33 is heated, and the brazing unit 33 are heated.
  • the heating pipe diameter which is the pipe diameter of the metal pipe 32 at the time, is measured.
  • the light projecting unit 23 projects light L onto the brazing unit 33.
  • the light L projected by the light projecting unit 23 is, for example, laser light.
  • the light receiving unit 24 is provided at a position away from the light projecting unit 23, and receives the light projected from the light projecting unit 23.
  • FIG. 2 is a configuration diagram showing a shape measuring device 12 according to the first embodiment.
  • a method of measuring the pipe diameter of the brazed portion 33 will be described with reference to FIG.
  • the metal pipe 32 is arranged between the light emitting unit 23 and the light receiving unit 24.
  • the light projecting unit 23 projects a band-shaped light L.
  • the band-shaped light L projected from the light projecting unit 23 reaches the light receiving unit 24 after the LA is partially blocked by the metal pipe 32. That is, the light receiving unit 24 receives the other portion LB of the band-shaped light L projected from the light projecting unit 23 that is not blocked by the metal pipe 32.
  • the light receiving unit 24 recognizes the portion where the light L is detected and the portion where the light L is not detected by the difference in luminous intensity, and extracts the position and contour of the brazing unit 33. Then, the shape measuring device 12 measures the pipe diameter based on the extracted contour. In this way, the shape measuring device 12 measures the diameter of the pre-heating pipe and the diameter of the heating pipe without contacting the metal pipe 32.
  • FIG. 3 is a configuration diagram showing a shape measuring device 12 according to the first embodiment.
  • FIG. 4 is a configuration diagram showing a shape measuring device 12 according to the first embodiment.
  • the shape measuring device 12 rotates in the circumferential C direction of the metal pipe 32, and measures the pipe diameter of the brazed portion 33 from a plurality of positions of the metal pipe 32 in the circumferential C direction. Further, the shape measuring device 12 moves in parallel with the shaft A of the metal pipe 32, and measures the pipe diameter of the brazed portion 33 from a plurality of positions along the shaft A of the metal pipe 32.
  • the pipe diameter of the brazing portion 33 may be measured from a plurality of positions by providing a plurality of shape measuring devices 12.
  • FIG. 5 is a functional block diagram showing the control device 13 according to the first embodiment.
  • the control device 13 calculates the heating temperature, which is the temperature during heating of the brazing portion 33, based on the difference between the pre-heating pipe diameter and the heating pipe diameter measured by the shape measuring device 12, and the heating temperature is defined as the threshold temperature.
  • the heating device 11 is controlled so as to be.
  • the control device 13 includes a calculation means 25, a control means 26, and a notification means 27.
  • the calculation means 25, the control means 26, and the notification means 27 are made of an algorithm.
  • the control device 13 is also referred to as a CPU (Central Processing Unit, central processing unit, processing device, arithmetic unit, microprocessor, microcomputer or processor) that executes a program stored in dedicated hardware or a storage device (not shown). ).
  • the control device 13 is dedicated hardware, the control device 13 is, for example, a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a combination thereof. Applies to.
  • Each of the functional units realized by the control device 13 may be realized by individual hardware, or each functional unit may be realized by one hardware.
  • each function executed by the control device 13 is realized by software, firmware, or a combination of software and firmware.
  • Software and firmware are written as programs and stored in a storage device (not shown).
  • the CPU realizes each function by reading and executing the program stored in the storage device.
  • the storage device is, for example, a non-volatile or volatile semiconductor memory such as a RAM, a ROM, a flash memory, an EPROM, or an EEPROM.
  • a part of the function of the control device 13 may be realized by dedicated hardware, and a part may be realized by software or firmware.
  • the calculation means 25 calculates the heating temperature, which is the temperature during heating of the brazing portion 33, based on the difference between the diameter of the pre-heating pipe and the diameter of the heating pipe measured by the shape measuring device 12. Generally, when the metal pipe 32 is heated, the diameter of the metal pipe 32 is increased due to thermal expansion. Further, the pipe diameter of the brazing portion 33 is unlikely to change in the brazing operation except that the brazing portion 33 is heated. Therefore, the heating temperature T2 is the pre-heating temperature T1 which is the temperature before heating of the brazing portion 33, the amount of dimensional change ⁇ D of the pipe diameter of the brazing portion 33 due to heating, the pre-heating pipe diameter D, and the coefficient of thermal expansion of the pipe material.
  • the temperature T1 before heating may be the room temperature of the work space where brazing is performed. Further, the pre-heating temperature T1 may be the temperature of the brazing portion 33 or another portion of the heat exchanger 2. In this case, the preheating temperature T1 is measured by a thermocouple or a non-contact temperature sensor. When a plurality of pipe diameter values are measured by the shape measuring device 12, the calculation means 25 may calculate the heating temperature T2 using the minimum or maximum value of the pipe diameter, or use the average value. The heating temperature T2 may be calculated. Further, the coefficient of thermal expansion ⁇ of the pipe material uses data or the like published at the time of purchase of the metal pipe 32, and does not require measurement by an operator when brazing.
  • the control means 26 controls the heating device 11 so that the heating temperature is within the threshold temperature range.
  • the threshold temperature zone is a temperature zone suitable for brazing. That is, the threshold temperature zone is a temperature zone in which the brazing material 3 having a melting point lower than that of the brazing portion 33 melts, but the brazing portion 33 does not melt.
  • the heating device 11 is a burner 22
  • the heating temperature is adjusted by, for example, changing the gas injection amount of the burner 22 and the distance between the burner 22 and the brazing portion 33. Further, the fine arrangement of the heating device 11 and the like may be adjusted by the operator.
  • the notification means 27 causes the notification device 14 to display that the heating temperature has reached the threshold temperature range.
  • the notification means 27 may display the heating temperature itself on the notification device 14.
  • the notification device 14 is, for example, a display.
  • the notification device 14 displays that the heating temperature has reached the threshold temperature range, the heating temperature itself, or the like, and notifies the user. Further, the notification device 14 may display that the heating temperature has reached the threshold temperature range by emitting a voice or turning on the sound.
  • FIG. 6 is a flowchart showing a brazing procedure according to the first embodiment.
  • the brazing procedure will be described with reference to FIG.
  • the heat exchanger main body 31 is set on the carriage 4 (step S1), and the carriage 4 is manually moved to the working position by a belt conveyor or a man (step S2).
  • the metal pipe 32 is inserted into the heat exchanger main body 31, and the heat exchanger 2 is assembled (step S3).
  • the shape measuring device 12 measures the diameter of the brazed portion 33 before heating (step S4).
  • the heating device 11 adjusts the gas flow rate and position of the burner 22 (step S5), and heats the brazing portion 33 (step S6).
  • the shape measuring device 12 measures the diameter of the heating pipe of the brazing portion 33 (step S7).
  • the calculation means 25 calculates the heating temperature based on the difference between the diameter of the pre-heating pipe and the diameter of the heating pipe (step S8).
  • the notification means 27 notifies that the heating temperature has reached the threshold temperature range (step S10). After that, the burner 22 melts the brazing material 3 charged into the brazing portion 33, and the brazing portion 33 is joined (step S11). Finally, the burner 22 is retracted (step S12), and the brazing device 1 completes the brazing (step S13). If the heating temperature has not reached the threshold temperature range (NO in step S9), the control means 26 readjusts the gas flow rate and position of the burner 22 (step S5).
  • Step S4 and S7 Operations other than the measurement of the pre-heating pipe diameter and the heating pipe diameter (steps S4 and S7), the calculation of the heating temperature (step S8), and the notification that the heating temperature has reached the threshold temperature range (step S10) are performed. It may be manual work by a person or a robot.
  • the calculation means 25 calculates the heating temperature based on the difference between the diameter of the pre-heating pipe and the diameter of the heating pipe measured by the shape measuring device 12.
  • the pipe diameter of the brazing portion 33 is unlikely to change in the brazing operation except that the brazing portion 33 is heated. Therefore, the amount of change in the pipe diameter of the brazing portion 33 due to heating and the amount of increase in temperature of the brazing portion 33 have a high correlation. Therefore, the brazing device 1 can accurately measure the temperature of the brazing portion 33 based on the difference between the diameter of the pre-heating pipe and the diameter of the heating pipe of the brazing portion 33.
  • the pipe diameter of the brazing portion 33 is measured from a plurality of positions. Therefore, the calculation means 25 uses the value most suitable for the condition in which brazing is performed from the values of the plurality of pipe diameters in the calculation of the heating temperature. Therefore, the brazing device 1 can measure the temperature of the brazing unit 33 more accurately.
  • the shape measuring device 12 rotates in the circumferential C direction of the metal pipe 32. Therefore, the pipe diameter of the brazed portion 33 is measured from a plurality of positions in the circumferential C direction of the metal pipe 32. That is, the calculation means 25 uses the value most suitable for the condition in which brazing is performed from the values of the plurality of pipe diameters in the calculation of the heating temperature. Therefore, the brazing device 1 can measure the temperature of the brazing unit 33 more accurately.
  • the shape measuring device 12 moves in parallel with the axis of the metal pipe 32. Therefore, the pipe diameter of the brazed portion 33 is measured from a plurality of positions in the direction along the axis A of the metal pipe 32. That is, the calculation means 25 uses the value most suitable for the condition in which brazing is performed from the values of the plurality of pipe diameters in the calculation of the heating temperature. Therefore, the brazing device 1 can measure the temperature of the brazing unit 33 with higher accuracy.
  • a plurality of shape measuring devices 12 may be provided.
  • the pipe diameter of the brazed portion 33 is measured from a plurality of positions. That is, the calculation means 25 uses the value most suitable for the condition in which brazing is performed from the values of the plurality of pipe diameters in the calculation of the heating temperature. Therefore, the brazing device 1 can measure the temperature of the brazing unit 33 more accurately.
  • FIG. 7 is a configuration diagram showing a shape measuring device 212 of the brazing device 201 according to the comparative example.
  • the effect of the first embodiment will be described in detail by comparing with the comparative example of FIG.
  • the shape measuring device 212 according to the comparative example is different from the first embodiment in that a radiation thermometer that detects infrared rays T emitted from the brazing unit 33 is used for measuring the temperature of the brazing unit 33. Therefore, the shape measuring device 212 according to the comparative example is affected by changes in emissivity due to the color, gloss, roughness, etc. of the tube material when measuring the heating temperature. Therefore, the shape measuring device 212 according to the comparative example needs to measure and set the emissivity even if the materials are the same. In addition, since there are many factors that affect the emissivity, there is a possibility that an error may occur in the measurement result of the heating temperature.
  • the calculation means 25 calculates the heating temperature based on the difference between the pre-heating pipe diameter and the heating pipe diameter measured by the shape measuring device 12. Therefore, in the brazing device 1, only the coefficient of thermal expansion needs to be set from the data or the like published at the time of purchasing the metal pipe 32. Therefore, the procedure for measuring the heating temperature is simple. Further, the pipe diameter of the brazing portion 33 is unlikely to change in the brazing operation except that the brazing portion 33 is heated. Therefore, the amount of change in the pipe diameter of the brazing portion 33 due to heating and the amount of increase in temperature of the brazing portion 33 have a high correlation. Therefore, the brazing device 1 can accurately measure the temperature of the brazing portion 33 based on the difference between the diameter of the pre-heating pipe and the diameter of the heating pipe of the brazing portion 33.
  • FIG. 8 is a configuration diagram showing the shape measuring device 112 according to the second embodiment.
  • the second embodiment is different from the first embodiment in that the light receiving unit 124 is provided integrally with the light emitting unit 123.
  • the same parts as those in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and the differences from the first embodiment will be mainly described.
  • the light receiving unit 124 is provided integrally with the light emitting unit 123.
  • the light receiving unit 124 receives the light M2 reflected from the brazing unit 33 among the light M1 emitted from the light emitting unit 123.
  • the shape measuring device 112 can measure the change in the pipe diameter of the brazing portion 33 from one direction. Therefore, even if the shape measuring device 112 has a portion where the brazing portion 33 overlaps when viewed from one direction, such as a U-shaped metal pipe, the shape measuring device 112 can accurately determine the pipe diameter when viewed from the other direction. Measure. Therefore, the brazing device 101 can accurately measure the temperature of the brazing portion 33 based on the difference between the diameter of the pre-heating pipe and the diameter of the heating pipe, even if the metal pipe 132 has a complicated shape.
  • brazing device 1 brazing device, 2 heat exchanger, 3 brazing material, 4 trolley, 11 heating device, 12 shape measuring device, 13 control device, 14 notification device, 21 arm, 22 burner, 23 floodlight section, 24 light receiving section, 25 Calculation means, 26 control means, 27 notification means, 28 joints, 31 heat exchanger body, 32 metal pipes, 33 brazing parts, 101 brazing devices, 112 shape measuring devices, 123 light emitting parts, 124 light receiving parts, 201 Rowing device, 212 shape measuring device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un dispositif de brasage pourvu : d'un dispositif de chauffage pour chauffer une partie de brasage dans laquelle des tuyaux métalliques doivent être brasés ; d'un dispositif de mesure de forme qui comprend une partie de projection de lumière pour projeter de la lumière sur la partie de brasage et une partie de réception de lumière pour recevoir la lumière projetée à partir de la partie de projection de lumière et qui mesure un diamètre de tuyau de préchauffage qui est le diamètre de tuyau du tuyau métallique avant que la partie de brasage ne soit chauffée et un diamètre de tuyau chauffé qui est le diamètre de tuyau du tuyau métallique lorsque la partie de brasage est chauffée ; et d'un dispositif de commande qui calcule une température de chauffage qui est la température lorsque la partie de brasage est chauffée, sur la base de la différence entre le diamètre de tuyau de préchauffage et le diamètre de tuyau chauffé mesurés par le dispositif de mesure de forme, et qui commande le dispositif de chauffage de telle sorte que la température de chauffage se situe dans une plage de température seuil.
PCT/JP2019/045629 2019-11-21 2019-11-21 Dispositif de brasage et échangeur de chaleur WO2021100173A1 (fr)

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PCT/JP2019/045629 WO2021100173A1 (fr) 2019-11-21 2019-11-21 Dispositif de brasage et échangeur de chaleur

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PCT/JP2019/045629 WO2021100173A1 (fr) 2019-11-21 2019-11-21 Dispositif de brasage et échangeur de chaleur

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7440788B1 (ja) 2022-08-26 2024-02-29 ダイキン工業株式会社 熱交換器の製造方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0172526U (fr) * 1987-11-02 1989-05-16
JPH08255819A (ja) * 1995-03-17 1996-10-01 Toshiba Corp 温度測定方法及びその装置
JPH11132729A (ja) * 1997-10-30 1999-05-21 Anritsu Corp 寸法測定装置
JP2001248995A (ja) * 2000-03-03 2001-09-14 Zexel Valeo Climate Control Corp 熱交換器
JP2001269705A (ja) * 2000-03-27 2001-10-02 Sumitomo Metal Ind Ltd 金属管の定径圧延装置および定径圧延方法
JP2010151503A (ja) * 2008-12-24 2010-07-08 Toto Sekisui Kk 外径測定装置
JP2014122734A (ja) * 2012-12-20 2014-07-03 Mitsubishi Electric Corp 熱交換器及び熱交換器の製造方法
JP2018065175A (ja) * 2016-10-19 2018-04-26 株式会社ケー・デー・イー ロウ付け装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0172526U (fr) * 1987-11-02 1989-05-16
JPH08255819A (ja) * 1995-03-17 1996-10-01 Toshiba Corp 温度測定方法及びその装置
JPH11132729A (ja) * 1997-10-30 1999-05-21 Anritsu Corp 寸法測定装置
JP2001248995A (ja) * 2000-03-03 2001-09-14 Zexel Valeo Climate Control Corp 熱交換器
JP2001269705A (ja) * 2000-03-27 2001-10-02 Sumitomo Metal Ind Ltd 金属管の定径圧延装置および定径圧延方法
JP2010151503A (ja) * 2008-12-24 2010-07-08 Toto Sekisui Kk 外径測定装置
JP2014122734A (ja) * 2012-12-20 2014-07-03 Mitsubishi Electric Corp 熱交換器及び熱交換器の製造方法
JP2018065175A (ja) * 2016-10-19 2018-04-26 株式会社ケー・デー・イー ロウ付け装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7440788B1 (ja) 2022-08-26 2024-02-29 ダイキン工業株式会社 熱交換器の製造方法
WO2024042772A1 (fr) * 2022-08-26 2024-02-29 ダイキン工業株式会社 Procédé de fabrication d'échangeur de chaleur

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