WO2021100173A1 - Brazing device and heat exchanger - Google Patents

Brazing device and heat exchanger 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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WIPO (PCT)
Prior art keywords
brazing
heating
pipe
shape measuring
diameter
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PCT/JP2019/045629
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French (fr)
Japanese (ja)
Inventor
計憲 足達
隆 金谷
洋輔 藤森
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三菱電機株式会社
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Priority to PCT/JP2019/045629 priority Critical patent/WO2021100173A1/en
Publication of WO2021100173A1 publication Critical patent/WO2021100173A1/en

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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

This brazing device is provided with: a heating device for heating a brazing portion in which metal pipes are to be brazed; a shape measuring device which includes a light projecting portion for projecting light onto the brazing portion, and a light receiving portion for receiving the light projected from the light projecting portion, and which measures a pre-heating pipe diameter, being the pipe diameter of the metal pipe before the brazing portion is heated, and a heated pipe diameter, being the pipe diameter of the metal pipe when the brazing portion is being heated; and a control device which calculates a heating temperature, being the temperature when the brazing portion is being heated, on the basis of the difference between the pre-heating pipe diameter and the heated pipe diameter measured by the shape measuring device, and which controls the heating device such that the heating temperature lies within a threshold temperature range.

Description

ロウ付け装置及び熱交換器Brazing device and heat exchanger
　本発明は、形状測定装置を備えるロウ付け装置及び熱交換器に関する。 The present invention relates to a brazing device and a heat exchanger provided with a shape measuring device.
　従来、熱交換器の配管のロウ付けを行うロウ付け装置が知られている。このようなロウ付け装置には、ロウ材をロウ付け部に投入する適切なタイミングを計る方法として、種々の方法が採用されうる。特許文献１には、放射温度計を用いて、ロウ材をロウ付け部に投入するタイミングを計るロウ付け装置が開示されている。特許文献１のロウ付け装置は、放射温度計を用いることで、加熱されているロウ付け部から発せられる赤外線を測定し、ロウ付け部の温度を計測する。特許文献１のロウ付け装置は、これにより、適切なロウ付けのタイミングを計ろうとするものである。 Conventionally, a brazing device for brazing the piping of a heat exchanger is known. In such a brazing device, various methods can be adopted as a method of measuring an appropriate timing for charging the brazing material into the brazing portion. 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.
特開２００９－１９５９１９号公報Japanese Unexamined Patent Publication No. 2009-195919
　しかしながら、特許文献１に開示されたロウ付け装置は、放射温度計を用いて、ロウ付け部の温度を計測する。このため、特許文献１のロウ付け装置において、例えば、ロウ付け部を加熱する際にバーナーが用いられた場合、放射温度計は、ロウ付け部に当たっているバーナーから発せられる火炎の赤外線を測定する虞がある。この場合、放射温度計は、ロウ付け部の温度よりも高温を示してしまう。このように、放射温度計は、ロウ付け部の温度以外の要素に計測結果が左右されやすい。したがって、特許文献１のロウ付け装置は、ロウ付け部の温度の計測結果に誤差が出てしまう虞がある。 However, 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.
　本発明は、上記のような課題を解決するためになされたもので、ロウ付け部の温度を精度よく計測するロウ付け装置及び熱交換器を提供するものである。 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.
　本発明に係るロウ付け装置は、金属配管のロウ付けがされるロウ付け部を加熱する加熱装置と、ロウ付け部に光を投射する投光部と、投光部から投射された光を受ける受光部とを有し、ロウ付け部が加熱される前における金属配管の配管径である加熱前配管径と、ロウ付け部が加熱されている際における金属配管の配管径である加熱配管径とを測定する形状測定装置と、形状測定装置が測定した加熱前配管径と加熱配管径との差に基づき、ロウ付け部が加熱されている際の温度である加熱温度を算出し、加熱温度が閾値温度帯の範囲内となるように加熱装置を制御する制御装置と、を備える。 The brazing device according to the present invention 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, and the heating pipe diameter, which is the pipe diameter of the metal pipe when the brazed part is heated. Based on the difference between the shape measuring device that measures and the pre-heating pipe diameter and the heating pipe diameter measured by the shape measuring device, the heating temperature, which is the temperature when the brazed part is heated, is calculated, and the heating temperature is A control device for controlling the heating device so as to be within the threshold temperature range is provided.
　本発明によれば、算出手段は、形状測定装置が計測した加熱前配管径と加熱配管径との差に基づいて、加熱温度を算出する。ここで、ロウ付け部の配管径は、ロウ付け作業において、ロウ付け部が加熱されること以外によっては、変化しづらい。このため、加熱によるロウ付け部の配管径の変化量とロウ付け部の温度の上昇量とは、高い相関を有する。したがって、ロウ付け装置は、ロウ付け部の加熱前配管径と加熱配管径との差に基づいて、ロウ付け部の温度を精度よく計測することができる。 According to the present invention, 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. Here, 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.
実施の形態１に係るロウ付け装置１を示す構成図である。It is a block diagram which shows the brazing apparatus 1 which concerns on Embodiment 1. FIG. 実施の形態１に係る形状測定装置１２を示す構成図である。It is a block diagram which shows the shape measuring apparatus 12 which concerns on Embodiment 1. FIG. 実施の形態１に係る形状測定装置１２を示す構成図である。It is a block diagram which shows the shape measuring apparatus 12 which concerns on Embodiment 1. FIG. 実施の形態１に係る形状測定装置１２を示す構成図である。It is a block diagram which shows the shape measuring apparatus 12 which concerns on Embodiment 1. FIG. 実施の形態１に係る制御装置１３を示す機能ブロック図である。It is a functional block diagram which shows the control device 13 which concerns on Embodiment 1. FIG. 実施の形態１に係るロウ付けの手順を示すフローチャートである。It is a flowchart which shows the brazing procedure which concerns on Embodiment 1. FIG. 比較例に係るロウ付け装置２０１の形状測定装置２１２を示す構成図である。It is a block diagram which shows the shape measuring apparatus 212 of the brazing apparatus 201 which concerns on a comparative example. 実施の形態２に係る形状測定装置１１２を示す構成図である。It is a block diagram which shows the shape measuring apparatus 112 which concerns on Embodiment 2. FIG.
　実施の形態１．
　（ロウ付け装置１及び熱交換器２）
　以下、実施の形態１に係るロウ付け装置１について、図面を参照しながら説明する。図１は、実施の形態１に係るロウ付け装置１を示す構成図である。図１に示すように、ロウ付け装置１は、熱交換器本体３１及び金属配管３２を有する熱交換器２において、金属配管３２のロウ付けを行うものである。熱交換器本体３１は、熱交換器２の枠体を構成するものである。熱交換器本体３１は、金属配管３２がロウ付けされる際に、台車４に載置される。金属配管３２は、冷媒が流れる配管であり、例えば、銅製である。金属配管３２は、ロウ付け部３３を有する。ロウ付け部３３は、ロウ材３が投入及び塗布される部分である。ロウ付け装置１は、加熱装置１１、形状測定装置１２、制御装置１３及び報知装置１４を有する。なお、本実施の形態１において、ロウ付け装置１は、熱交換器２の金属配管３２のロウ付けを行う場合について例示をしているが、熱交換器本体３１のロウ付けを行うものであってもよいし、他の機器の金属配管のロウ付けを行うものであってもよい。 Embodiment 1.
(Brazing device 1 and heat exchanger 2)
Hereinafter, the brazing device 1 according to the first embodiment will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a brazing device 1 according to the first embodiment. As shown in FIG. 1, 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. In the first embodiment, 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.
　（加熱装置１１）
　加熱装置１１は、アーム２１及びバーナー２２からなる。アーム２１は、先端にバーナー２２が接続され、ロウ付けが行われる作業場所に設置される。アーム２１は、複数の関節部２８を有しており、バーナー２２の角度を自在に変更し、任意の角度で固定する。なお、アーム２１は、上記の態様に限定されるものではない。また、ロウ付け装置１は、アーム２１を有していなくてもよい。この場合、作業者がバーナー２２を握持して、ロウ付け部３３に対し、ロウ付けを行う。バーナー２２は、金属配管３２のロウ付け部３３に対して、火炎を噴射し、ロウ付け部３３を加熱するものである。バーナー２２は、設備コストが安価でありながら、複雑な形状のロウ付け部に対応が可能である。なお、加熱装置１１は、バーナー２２によってロウ付け部３３を加熱するものではなく、例えば、近赤外線を照射することによってロウ付け部３３を加熱するものであってもよい。 (Heating device 11)
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. Further, 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.
　（形状測定装置１２）
　形状測定装置１２は、投光部２３及び受光部２４からなり、ロウ付け部３３が加熱される前における金属配管３２の配管径である加熱前配管径及び、ロウ付け部３３が加熱されている際における金属配管３２の配管径である加熱配管径を測定する。投光部２３は、ロウ付け部３３に光Ｌを投射するものである。投光部２３が投射する光Ｌは、例えば、レーザー光である。受光部２４は、投光部２３と離れた位置に設けられ、投光部２３から投射された光を受けるものである。 (Shape measuring device 12)
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.
　図２は、実施の形態１に係る形状測定装置１２を示す構成図である。ここで、ロウ付け部３３の配管径の測定方法について、図２を用いて説明する。まず、金属配管３２は、投光部２３と受光部２４との間に配置される。次に、投光部２３は、帯状の光Ｌを投射する。そして、投光部２３から投射された帯状の光Ｌは、金属配管３２によって一部ＬＡが遮られ、受光部２４に届く。即ち、受光部２４は、投光部２３から投射された帯状の光Ｌのうち、金属配管３２に遮られなかった他部ＬＢを受ける。この際に、受光部２４は、光Ｌを検知した部分と光Ｌを検知しなかった部分とを光度差によって認識し、ロウ付け部３３の位置及び輪郭を抽出する。そして、形状測定装置１２は、抽出された輪郭をもとに配管径を測定する。このように、形状測定装置１２は、加熱前配管径及び加熱配管径の測定を金属配管３２に接触せずに行う。 FIG. 2 is a configuration diagram showing a shape measuring device 12 according to the first embodiment. Here, a method of measuring the pipe diameter of the brazed portion 33 will be described with reference to FIG. First, the metal pipe 32 is arranged between the light emitting unit 23 and the light receiving unit 24. Next, the light projecting unit 23 projects a band-shaped light L. Then, 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. At this time, 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.
　図３は、実施の形態１に係る形状測定装置１２を示す構成図である。図４は、実施の形態１に係る形状測定装置１２を示す構成図である。図３に示すように、形状測定装置１２は、金属配管３２の円周Ｃ方向に回転し、ロウ付け部３３の配管径を金属配管３２の円周Ｃ方向の複数の位置から測定する。また、形状測定装置１２は、金属配管３２の軸Ａに並行して動き、ロウ付け部３３の配管径を金属配管３２の軸Ａに沿った複数の位置から測定する。なお、ロウ付け部３３の配管径は、図４に示すように、形状測定装置１２が複数台設けられることで、複数の位置から測定されるようにしてもよい。 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. As shown in FIG. 3, 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. As shown in FIG. 4, 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.
　（制御装置１３）
　図５は、実施の形態１に係る制御装置１３を示す機能ブロック図である。制御装置１３は、形状測定装置１２が計測した加熱前配管径と加熱配管径との差に基づき、前記ロウ付け部３３の加熱中の温度である加熱温度を算出し、加熱温度が閾値温度となるように加熱装置１１を制御する。図５に示すように、制御装置１３は、算出手段２５、制御手段２６及び報知手段２７を有する。算出手段２５、制御手段２６及び報知手段２７は、アルゴリズムからなる。 (Control device 13)
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. As shown in FIG. 5, 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.
　制御装置１３は、専用のハードウェア又は記憶装置（図示せず）に格納されるプログラムを実行するＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ、中央処理装置、処理装置、演算装置、マイクロプロセッサ、マイクロコンピュータ又はプロセッサともいう）で構成される。制御装置１３が専用のハードウェアである場合、制御装置１３は、例えば、単一回路、複合回路、ＡＳＩＣ（Ａｐｐｌｉｃａｔｉｏｎ　Ｓｐｅｃｉｆｉｃ　Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）、ＦＰＧＡ（Ｆｉｅｌｄ－Ｐｒｏｇｒａｍｍａｂｌｅ　Ｇａｔｅ　Ａｒｒａｙ）、又は、これらを組み合わせたものが該当する。制御装置１３が実現する各機能部のそれぞれを、個別のハードウェアで実現してもよいし、各機能部を一つのハードウェアで実現してもよい。 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). ). When 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.
　制御装置１３がＣＰＵの場合、制御装置１３が実行する各機能は、ソフトウェア、ファームウェア、又はソフトウェアとファームウェアとの組み合わせにより実現される。ソフトウェア及びファームウェアはプログラムとして記述され、記憶装置（図示せず）に格納される。ＣＰＵは、記憶装置に格納されたプログラムを読み出して実行することにより、各機能を実現する。ここで、記憶装置は、例えば、ＲＡＭ、ＲＯＭ、フラッシュメモリ、ＥＰＲＯＭ、ＥＥＰＲＯＭ等の不揮発性又は揮発性の半導体メモリである。なお、制御装置１３の機能の一部を専用のハードウェアで実現し、一部をソフトウェア又はファームウェアで実現するようにしてもよい。 When the control device 13 is a CPU, 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. Here, 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.
　（算出手段２５）
　算出手段２５は、形状測定装置１２が測定した加熱前配管径と加熱配管径との差に基づき、ロウ付け部３３の加熱中の温度である加熱温度を算出する。概して、金属配管３２は、加熱されることで、熱膨張により配管径が拡大する。また、ロウ付け部３３の配管径は、ロウ付け作業において、ロウ付け部３３が加熱されること以外によっては、変化しづらい。このため、加熱温度Ｔ２は、ロウ付け部３３の加熱前の温度である加熱前温度Ｔ１、加熱によるロウ付け部３３の配管径の寸法変化量ΔＤ、加熱前配管径Ｄ及び管材の熱膨張係数αとの間に成立する関係式Ｔ２＝ΔＤ／（α×Ｄ）＋Ｔ１から算出される。なお、加熱前温度Ｔ１は、ロウ付けを行う作業空間の室温であってもよい。また、加熱前温度Ｔ１は、ロウ付け部３３又は熱交換器２の他の部分の温度であってもよい。この場合、加熱前温度Ｔ１は、熱電対又は非接触式の温度センサによって測定される。なお、形状測定装置１２によって複数の配管径の値が測定された場合、算出手段２５は、配管径の最小値又は最大値を用いて加熱温度Ｔ２を算出してもよいし、平均値を用いて加熱温度Ｔ２を算出してもよい。また、管材の熱膨張係数αは、金属配管３２の購入時に公開されているデータ等が用いられ、ロウ付けを行う際に、作業者による計測を要しない。 (Calculation means 25)
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 ΔD 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. It is calculated from the relational expression T2 = ΔD / (α × D) + T1 that holds with α. 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 α 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.
　（制御手段２６）
　制御手段２６は、加熱温度が閾値温度帯の範囲内となるように加熱装置１１を制御する。閾値温度帯は、ロウ付けに適した温度帯である。即ち、閾値温度帯は、ロウ付け部３３より融点の低いロウ材３が溶融する一方で、ロウ付け部３３が溶融しない温度帯である。加熱温度は、加熱装置１１がバーナー２２である場合、例えば、バーナー２２のガス噴射量及びバーナー２２とロウ付け部３３との距離を変更することで調整される。また、加熱装置１１の細かい配置等は、作業者によって調整されるようにしてもよい。 (Control means 26)
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. When 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.
　（報知手段２７）
　報知手段２７は、加熱温度が閾値温度帯に達したことを報知装置１４に表示させる。なお、報知手段２７は、加熱温度そのものを報知装置１４に表示させてもよい。 (Notification means 27)
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.
　（報知装置１４）
　報知装置１４は、例えば、ディスプレイである。報知装置１４は、加熱温度が閾値温度帯に達したこと又は加熱温度そのもの等を表示し、報知を行うものである。また、報知装置１４は、音声を発したり、点灯したりすることで、加熱温度が閾値温度帯に達したことを表示するものであってもよい。 (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.
　（ロウ付けの手順）
　図６は、実施の形態１に係るロウ付けの手順を示すフローチャートである。図６を用いて、ロウ付けの手順について説明する。まず、熱交換器本体３１は、台車４にセットされ（ステップＳ１）、台車４がベルトコンベア又は人手によって作業位置まで移動される（ステップＳ２）。次に、金属配管３２が熱交換器本体３１に挿入され、熱交換器２が組み立てられる（ステップＳ３）。ここで、形状測定装置１２は、ロウ付け部３３の加熱前配管径を測定する（ステップＳ４）。そして、加熱装置１１は、バーナー２２のガス流量及び位置が調整され（ステップＳ５）、ロウ付け部３３を加熱する（ステップＳ６）。ロウ付け部３３が加熱されている際に、形状測定装置１２は、ロウ付け部３３の加熱配管径を測定する（ステップＳ７）。この際に、算出手段２５は、加熱前配管径と加熱配管径との差に基づき、加熱温度を算出する（ステップＳ８）。 (Brazing procedure)
FIG. 6 is a flowchart showing a brazing procedure according to the first embodiment. The brazing procedure will be described with reference to FIG. First, 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). Next, the metal pipe 32 is inserted into the heat exchanger main body 31, and the heat exchanger 2 is assembled (step S3). Here, the shape measuring device 12 measures the diameter of the brazed portion 33 before heating (step S4). Then, 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). When the brazing portion 33 is heated, the shape measuring device 12 measures the diameter of the heating pipe of the brazing portion 33 (step S7). At this time, 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).
　加熱温度が閾値温度帯に達した場合（ステップＳ９のＹＥＳ）、報知手段２７は、加熱温度が閾値温度帯に達したことを報知する（ステップＳ１０）。その後、バーナー２２は、ロウ付け部３３に投入されたロウ材３を溶融させ、ロウ付け部３３が接合される（ステップＳ１１）。最後に、バーナー２２が退避され（ステップＳ１２）、ロウ付け装置１は、ロウ付けを完了する（ステップＳ１３）。また、加熱温度が閾値温度帯に達していない場合（ステップＳ９のＮＯ）、制御手段２６は、バーナー２２のガス流量及び位置を再度調整する（ステップＳ５）。なお、加熱前配管径及び加熱配管径の測定（ステップＳ４及びＳ７）、加熱温度の算出（ステップＳ８）及び加熱温度が閾値温度帯に達したことの報知（ステップＳ１０）以外の動作は、作業者の手作業によるものであっても、ロボットによるものであってもよい。 When the heating temperature reaches the threshold temperature range (YES in step S9), 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). 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.
　本実施の形態１によれば、算出手段２５は、形状測定装置１２が計測した加熱前配管径と加熱配管径との差に基づいて、加熱温度を算出する。ここで、ロウ付け部３３の配管径は、ロウ付け作業において、ロウ付け部３３が加熱されること以外によっては、変化しづらい。このため、加熱によるロウ付け部３３の配管径の変化量とロウ付け部３３の温度の上昇量とは、高い相関を有する。したがって、ロウ付け装置１は、ロウ付け部３３の加熱前配管径と加熱配管径との差に基づいて、ロウ付け部３３の温度を精度よく計測することができる。 According to the first embodiment, 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. Here, 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.
　また、本実施の形態１によれば、ロウ付け部３３の配管径は、複数の位置から測定される。このため、算出手段２５は、複数の配管径の値からロウ付けが行われる条件に最も適した値を加熱温度の算出に用いる。したがって、ロウ付け装置１は、ロウ付け部３３の温度をより精度よく計測することができる。 Further, according to the first embodiment, 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.
　また、本実施の形態１によれば、形状測定装置１２は、金属配管３２の円周Ｃ方向に回転する。このため、ロウ付け部３３の配管径は、金属配管３２の円周Ｃ方向において複数の位置から測定される。即ち、算出手段２５は、複数の配管径の値からロウ付けが行われる条件に最も適した値を加熱温度の算出に用いる。したがって、ロウ付け装置１は、ロウ付け部３３の温度をより精度よく計測することができる。 Further, according to the first embodiment, 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.
　また、更に、本実施の形態１によれば、形状測定装置１２は、金属配管３２の軸に並行して動く。このため、ロウ付け部３３の配管径は、金属配管３２の軸Ａに沿う方向において複数の位置から測定される。即ち、算出手段２５は、複数の配管径の値からロウ付けが行われる条件に最も適した値を加熱温度の算出に用いる。したがって、ロウ付け装置１は、ロウ付け部３３の温度を更に精度よく計測することができる。 Further, according to the first embodiment, 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.
　なお、形状測定装置１２は、複数台設けられてもよい。この場合、ロウ付け部３３の配管径は、複数の位置から測定される。即ち、算出手段２５は、複数の配管径の値からロウ付けが行われる条件に最も適した値を加熱温度の算出に用いる。したがって、ロウ付け装置１は、ロウ付け部３３の温度をより精度よく計測することができる。 A plurality of shape measuring devices 12 may be provided. In this case, 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.
　図７は、比較例に係るロウ付け装置２０１の形状測定装置２１２を示す構成図である。本実施の形態１の効果について、図７の比較例と比較することで詳細に説明する。比較例に係る形状測定装置２１２は、ロウ付け部３３の温度の計測に、ロウ付け部３３から放射される赤外線Ｔを検知する放射温度計を用いる点で本実施の形態１と相違する。このため、比較例に係る形状測定装置２１２は、加熱温度を計測する際に、管材の色、光沢及び粗さ等による放射率の変化の影響を受ける。したがって、比較例に係る形状測定装置２１２は、同一の素材であったとしても、放射率を計測し、設定する必要がある。また、放射率に影響を与える要素が多いため、加熱温度の計測結果には、誤差が生じる虞がある。 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.
　これに対して、本実施の形態１によれば、算出手段２５は、形状測定装置１２が計測した加熱前配管径と加熱配管径との差に基づいて、加熱温度を算出する。このため、ロウ付け装置１は、金属配管３２の購入時に公開されているデータ等から熱膨張率のみが設定されればよい。したがって、加熱温度を計測する手順は、簡便である。また、ロウ付け部３３の配管径は、ロウ付け作業において、ロウ付け部３３が加熱されること以外によっては、変化しづらい。このため、加熱によるロウ付け部３３の配管径の変化量とロウ付け部３３の温度の上昇量とは、高い相関を有する。したがって、ロウ付け装置１は、ロウ付け部３３の加熱前配管径と加熱配管径との差に基づいて、ロウ付け部３３の温度を精度よく計測することができる。 On the other hand, according to the first embodiment, 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.
　実施の形態２．
　図８は、実施の形態２に係る形状測定装置１１２を示す構成図である。図８に示すように、本実施の形態２は、受光部１２４が投光部１２３と一体的に設けられている点で実施の形態１と相違する。本実施の形態２では、実施の形態１と同一の部分は同一の符合を付して説明を省略し、実施の形態１との相違点を中心に説明する。 Embodiment 2.
FIG. 8 is a configuration diagram showing the shape measuring device 112 according to the second embodiment. As shown in FIG. 8, 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. In the second embodiment, 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.
　（形状測定装置１１２）
　受光部１２４は、投光部１２３と一体的に設けられている。受光部１２４は、投光部１２３から照射された光Ｍ１のうち、ロウ付け部３３から反射した光Ｍ２を受ける。 (Shape measuring device 112)
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.
　本実施の形態２によれば、投光部１２３と一体的に設けられ、投光部１２３から照射された光Ｍ１のうち、ロウ付け部３３から反射した光Ｍ２を受ける。即ち、形状測定装置１１２は、ロウ付け部３３の配管径の変化を一方向から測定することができる。このため、形状測定装置１１２は、Ｕ字形状の金属配管のように一方向から見た際にロウ付け部３３が重なる部分がある場合でも、他の方向から見ることで、配管径を正確に測定する。したがって、ロウ付け装置１０１は、複雑な形状の金属配管１３２であっても、加熱前配管径と加熱配管径との差に基づいて、ロウ付け部３３の温度を精度よく計測することができる。 According to the second embodiment, it is provided integrally with the light projecting unit 123, and among the light M1 emitted from the light projecting unit 123, the light M2 reflected from the brazing unit 33 is received. That is, 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.
　１　ロウ付け装置、２　熱交換器、３　ロウ材、４　台車、１１　加熱装置、１２　形状測定装置、１３　制御装置、１４　報知装置、２１　アーム、２２　バーナー、２３　投光部、２４　受光部、２５　算出手段、２６　制御手段、２７　報知手段、２８　関節部、３１　熱交換器本体、３２　金属配管、３３　ロウ付け部、１０１　ロウ付け装置、１１２　形状測定装置、１２３　投光部、１２４　受光部、２０１　ロウ付け装置、２１２　形状測定装置。 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.

Claims (8)

  1. 　金属配管のロウ付けがされるロウ付け部を加熱する加熱装置と、
    　前記ロウ付け部に光を投射する投光部と、前記投光部から投射された光を受ける受光部とを有し、前記ロウ付け部が加熱される前における前記金属配管の配管径である加熱前配管径と、前記ロウ付け部が加熱されている際における前記金属配管の配管径である加熱配管径とを測定する形状測定装置と、
    　前記形状測定装置が測定した前記加熱前配管径と前記加熱配管径との差に基づき、前記ロウ付け部が加熱されている際の温度である加熱温度を算出し、前記加熱温度が閾値温度帯の範囲内となるように前記加熱装置を制御する制御装置と、を備える
    　ロウ付け装置。     A heating device that heats the brazed part where metal pipes are brazed,
    It has a light projecting portion that projects light onto the brazed portion and a light receiving portion that receives the light projected from the brazing portion, and is the pipe diameter of the metal pipe before the brazing portion is heated. A shape measuring device that measures the diameter of the pipe before heating and the diameter of the heated pipe, which is the diameter of the metal pipe when the brazed portion is heated.
    Based on the difference between the pre-heating pipe diameter and the heating pipe diameter measured by the shape measuring device, the heating temperature, which is the temperature when the brazing portion is heated, is calculated, and the heating temperature is in the threshold temperature range. A brazing device comprising a control device for controlling the heating device so as to be within the range of.
  2. 　前記受光部は、
    　前記投光部と離れた位置に設けられる
    　請求項１に記載のロウ付け装置。     The light receiving part is
    The brazing device according to claim 1, which is provided at a position away from the light projecting unit.
  3. 　前記受光部は、
    　前記投光部と一体的に設けられ、前記投光部から照射された光のうち、前記ロウ付け部から反射した光を受ける
    　請求項１又は２に記載のロウ付け装置。     The light receiving part is
    The brazing device according to claim 1 or 2, which is provided integrally with the light projecting unit and receives the light reflected from the brazing unit among the light emitted from the light projecting unit.
  4. 　前記形状測定装置は、
    　前記ロウ付け部の配管径を複数の位置から測定する
    　請求項１～３のいずれか１項に記載のロウ付け装置。     The shape measuring device is
    The brazing device according to any one of claims 1 to 3, wherein the pipe diameter of the brazing portion is measured from a plurality of positions.
  5. 　前記形状測定装置は、
    　前記金属配管の円周方向に回転する
    　請求項４に記載のロウ付け装置。     The shape measuring device is
    The brazing device according to claim 4, wherein the metal pipe rotates in the circumferential direction.
  6. 　前記形状測定装置は、
    　前記金属配管の軸に並行して動く
    　請求項４又は５に記載のロウ付け装置。     The shape measuring device is
    The brazing device according to claim 4 or 5, which moves in parallel with the shaft of the metal pipe.
  7. 　前記形状測定装置は、
    　複数台設けられる
    　請求項４～６のいずれか１項に記載のロウ付け装置。     The shape measuring device is
    The brazing device according to any one of claims 4 to 6, wherein a plurality of brazing devices are provided.
  8. 　請求項１～７のいずれか１項に記載のロウ付け装置を用いてロウ付けされた前記金属配管を備える
    　熱交換器。     A heat exchanger comprising the metal pipe brazed using the brazing device according to any one of claims 1 to 7.
PCT/JP2019/045629 2019-11-21 2019-11-21 Brazing device and heat exchanger WO2021100173A1 (en)

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JPH08255819A (en) * 1995-03-17 1996-10-01 Toshiba Corp Temperature measuring method and equipment
JPH11132729A (en) * 1997-10-30 1999-05-21 Anritsu Corp Dimension measuring device
JP2001248995A (en) * 2000-03-03 2001-09-14 Zexel Valeo Climate Control Corp Heat exchanger
JP2001269705A (en) * 2000-03-27 2001-10-02 Sumitomo Metal Ind Ltd Device and method for sizing metallic tube
JP2010151503A (en) * 2008-12-24 2010-07-08 Toto Sekisui Kk Device for measuring outer diameter
JP2014122734A (en) * 2012-12-20 2014-07-03 Mitsubishi Electric Corp Heat exchanger and heat exchanger manufacturing method
JP2018065175A (en) * 2016-10-19 2018-04-26 株式会社ケー・デー・イー Brazing device

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JPH0172526U (en) * 1987-11-02 1989-05-16
JPH08255819A (en) * 1995-03-17 1996-10-01 Toshiba Corp Temperature measuring method and equipment
JPH11132729A (en) * 1997-10-30 1999-05-21 Anritsu Corp Dimension measuring device
JP2001248995A (en) * 2000-03-03 2001-09-14 Zexel Valeo Climate Control Corp Heat exchanger
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JP2010151503A (en) * 2008-12-24 2010-07-08 Toto Sekisui Kk Device for measuring outer diameter
JP2014122734A (en) * 2012-12-20 2014-07-03 Mitsubishi Electric Corp Heat exchanger and heat exchanger manufacturing method
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Publication number Priority date Publication date Assignee Title
WO2024042772A1 (en) * 2022-08-26 2024-02-29 ダイキン工業株式会社 Manufacturing method for heat exchanger
JP7440788B1 (en) 2022-08-26 2024-02-29 ダイキン工業株式会社 Heat exchanger manufacturing method

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