JP2015118893A - Heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact heating apparatus without using an inert gas such as nitrogen by concurrently using super heated steam and high-frequency induction heating.SOLUTION: A heating apparatus comprises a heating chamber, a super heated steam shield, a high-frequency induction heater, a heater control device, a super heated steam generator, an exhaust device, a temperature measuring instrument and a heating control device. By supplying super heated steam from the super heated steam generator instead of an inert gas such as nitrogen to create a hypoxic state and directly and inductively heating the heating object by the high-frequency induction heater in order to prevent oxydation of a heated object, a compact heating apparatus can be provided.

Description

  The present invention relates to a heating apparatus that heats members in order to join the members, which are a combination of a plurality of members, by brazing.

  As an example of a conventional brazing heating apparatus, there is an apparatus disclosed in Patent Document 1.

  FIG. 6 shows a conventional heating device described in Patent Document 1. As shown in FIG. In the figure, a heating device 10 that performs brazing fills the inside of the heating device 10 with an inert gas from an inert gas supply source 54. While preventing the formation of an oxide film on the surface of the structure 22 by the inert gas, the structure 22 is heated in the combustion device 50 in a very long furnace structure so as to be called a continuous furnace, Brazing is performed.

  Moreover, there exists an apparatus shown by patent document 2 as a conventional heating apparatus. FIG. 7 shows a conventional heating device described in Patent Document 2. As shown in FIG.

  In this figure, this heating device is a device in which an object to be heated is put in a crucible 6 and heated by an electric resistance heater 7 to completely melt it, but in order to prevent the melted object from being oxidized. , Nitrogen, argon gas and superheated steam are sealed in the crucible 6 of the apparatus at a pressure of 10 Pascals or more.

JP 2004-009133 A JP 2008-215794 A

  Among the above conventional examples, Patent Document 1 cannot be heated rapidly because the object to be heated is heated by radiant heat from a heater or the like. Therefore, it becomes a large device called a continuous furnace. Moreover, since it is necessary to maintain the inside of a large apparatus in a low oxygen state, it is necessary to continue filling with an inert gas such as nitrogen.

  Moreover, also about patent document 2, since it heat-transfer-heats by the heat_generation | fever of an electrical resistance type heater, it cannot heat rapidly.

  An object of the present invention is to solve the above-described conventional problems, and to provide a compact heating device that enables direct and rapid heating of an object to be heated.

  A heating device according to a first invention for achieving the above object includes a heating chamber that houses an object to be heated, a superheated steam generator that supplies superheated steam from a supply port provided at a lower portion of the heating chamber, and a heating device. An exhaust device that exhausts air from an exhaust port provided on the upper surface of the chamber, a work holding table that is provided inside the heating chamber and holds an object to be heated, a coil disposed so as to surround the work holding table, and a coil A superheated steam shield disposed outside the heater, and a heater disposed on the wall surface of the heating chamber.

  In this heating device, a high-frequency induction heater that controls high-frequency induction heating by supplying a high-frequency current to the coil, a heater control device that controls the temperature of the heater, and a temperature measurement that monitors the temperature of the heating chamber and the temperature of the object to be heated And a temperature control device for controlling the superheated steam generator and the high-frequency induction heater from the data of the temperature measuring device.

  In order to achieve the above object, a heating device according to a second aspect of the present invention is the heating control device, wherein the superheated steam generator, the high-frequency induction heater, the heater control device, and the exhaust device operating parameter setting and A control device capable of performing an operation command and having a function of storing temperature input from the temperature measuring device and performing feedback control to the high frequency induction heater, the heater control device, and the exhaust device from the temperature input data It is characterized by providing.

  A heating device according to a third aspect of the present invention for achieving the above object is to cool the heating chamber by heating in advance in the heater control device before supplying superheated steam from the superheated steam generator. Further, it is possible to prevent dew condensation due to the superheated steam hitting the heating.

  A heating device according to a fourth aspect of the present invention for achieving the above object is characterized in that the superheat is directly applied to the heating object which is carried from the outside of the heating chamber and the coil through which the cooling water of the high frequency induction heater flows and is cooled. In order to prevent dew condensation due to direct contact with the superheated steam from the steam generator, a superheated steam shield is provided.

  A heating device according to a fifth aspect of the present invention for achieving the above object provides heating without supplying an inert gas such as nitrogen by bringing the heating chamber into a low oxygen state with superheated steam from the superheated steamer. It is characterized by preventing oxidation of the object.

  A heating apparatus according to a sixth invention for achieving the above object eliminates the need for a structure like a continuous furnace by directly and rapidly heating an object to be heated by the coil of the high-frequency inductor. .

  A heating device according to a seventh aspect of the invention for achieving the above object is characterized in that the superheated steam shield is made of a material, ceramics, ferrite, or the like that is not affected by the magnetic field due to the high-frequency heating.

  A heating device according to an eighth invention for achieving the above object comprises a supply port for the superheated steam from the superheated steam generator at a lower portion of the heating chamber, and an exhaust of the exhaust device at the upper portion of the heating chamber. The structure is characterized by having a mouth.

  As described above, according to the heating device of the present invention, it is possible to reduce the incidental facilities and suppress nitrogen leakage without requiring an inert gas supply source without requiring a long continuous furnace exceeding 20 m. An object is to provide a heating device that is possible and compact.

Schematic diagram of the heating apparatus of the present invention Form figure of form 1 of superheated steam shield of heating apparatus of implementation of this invention Form figure of form 2 of superheated steam shield of heating apparatus of implementation of this invention Form figure of form 3 of superheated steam shield of heating apparatus of implementation of this invention Form figure of form 4 of superheated steam shield of heating apparatus of implementation of this invention The figure which shows the conventional heating apparatus described in patent document 1 The figure which shows the conventional heating apparatus described in patent document 2

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a heating apparatus according to the present invention. First, the configuration of the heating device according to the present invention will be described.

  The heating apparatus according to the present invention includes a heating chamber 100, a work holding base 103 that holds a heating target object 101 in the heating chamber 100, and a high-frequency induction that is disposed so as to surround the heating target object 101 and the work holding base 103. The heating coil 105, the superheated steam shield 102 disposed outside the coil 105, and the heater 110 disposed on the wall surface of the heating chamber 100 are configured.

  At this time, a superheated steam supply port 112 is provided in the lower portion of the heating chamber 100, and an exhaust port 113 is disposed in the upper portion of the heating chamber 100. In addition, the heating device according to the present invention includes a temperature measuring element 104 for measuring the temperature in the vicinity of the object to be heated 101 on the work holder 103, a high-frequency induction heater 106 electrically connected to the coil 105, and a heater. A heater control device 109 that controls 110, an overheated steam generator 107, an exhaust device 108, a temperature probe 114 that measures the indoor temperature of the heating chamber 100, a temperature measuring device 120, and a heating control device 111. Provided.

  In FIG. 1, a heating object 101 can be arranged on a work holding table 103 in a heating chamber 100, and a temperature measuring element 104 is arranged on the work holding table 103. A high frequency induction heating coil 105 is disposed so as to surround the heating object 101 and the work holding table 103, and an overheated steam shield 102 is disposed outside the coil 105. A high frequency induction heater 106 is connected to the tip of the coil 105, and a high frequency induction current and cooling water for cooling flow through the coil 105. A heater 110 is disposed on the wall surface of the heating chamber 100, and the temperature is controlled by the heater control device 109.

  Further, a superheated steam supply port 112 is arranged at the lower part of the heating chamber 100 and a superheated steam generator 107 is connected thereto, and an exhaust port 113 is arranged at the upper part of the heating chamber 100 and an exhaust device 108 is connected. . The temperature measuring element 104 arranged on the work holder 103 and the temperature measuring element 114 measuring the room temperature of the heating chamber 100 are connected to the temperature measuring instrument 120, and the temperature measuring instrument 120 inputs temperature information. ing.

  The high-frequency induction heater 106, the superheated steam generator 107, the exhaust device 108, the heater control device 109, and the temperature measuring device 120 are connected to the heating control device 111, and can set each operation parameter and operation command of these devices. Thus, feedback control to the high frequency induction heater 106, the superheated steam generator 107, the exhaust device 108, and the heater control device 109 can be performed from the temperature input data from the temperature measuring device 120.

  Next, the heating procedure and operation contents in the heating apparatus according to the present invention will be described with reference to FIG.

  First, in the heating control device 111, the heating temperature in the heater 110 of the heating chamber 100, the superheated steam temperature and superheated steam supply amount and supply timing of the superheated steam generator 107, the induction heating timing and heating time of the high frequency induction heater 106, and so on. In addition, current output setting, exhaust timing of the exhaust device 108 and exhaust time are set.

  At this time, the set temperature of the heater and the set temperature of the superheated steam are set to 605 ° C. ± 10 ° C., which is the melting point of the brazing material of aluminum.

  Thereafter, the object to be heated 101 is placed on a workpiece holder 103 made of a material that is not affected by the magnetic field due to induction heating from the coil 105, for example, ceramic, ferrite, etc., and a heating start instruction is heated. This is performed from the control device 111. Then, in order not to create an oxidation condition by condensation due to the temperature difference between the superheated steam from the superheated steam generator 107 and the furnace wall of the heating chamber 100 from the heating control device 111, first, the heater control device 109 is commanded, Heating is performed until the room temperature of the heating chamber 100 reaches the set temperature, and the temperature is maintained at the set temperature.

  After heating the heating chamber with the heater 110, the heating control device 111 issues a command to the superheated steam generator 107 and the exhaust device 108, and the superheated steam generator 107 supplies superheated steam to the heating chamber 100 through the superheated steam supply port 112 and exhausts it. Exhaust from the opening 113 is performed to reduce the oxygen concentration in the heating chamber 100. At this time, in order to braze aluminum, the oxygen concentration needs to be 30 ppm or less. When this superheated steam is supplied, if it directly hits the coil 105 for high frequency induction heating, the cooling water for cooling the coil flows through the coil 105, and condensation occurs in the coil, creating an oxidizing condition. The superheated steam shield 102 prevents the superheated steam from hitting the coil 105.

  The superheated steam shield 102 is made of a material that is not affected by a magnetic field due to induction heating from the coil 105, ceramics, ferrite, or the like. After sufficiently reducing the oxygen concentration in the heating chamber 100 with superheated steam and increasing the temperature in the heating chamber 100 together, the heating controller 111 instructs the high-frequency induction heater 106 to The object to be heated is directly heated by induction heating.

  As described above, the heating device according to the present invention can provide a heating device that is compact and does not require an inert gas such as nitrogen.

  In the present embodiment, the heater control device 109 and the heater 110 are provided for heating the heating chamber. Instead, a high frequency induction heater may be disposed and the heating chamber may be heated by a coil.

(Overheated steam shield form 1)
FIG. 2 is a schematic diagram of the shape of the superheated steam shield according to the first embodiment of the heating device of the present invention. In FIG. 2, the same components as those in FIG.

  In FIG. 2, the side surface of the superheated steam shield 102 is a lattice or punching metal 201 as shown by the arrow A, and has a structure that allows superheated steam to be taken in from the side surface.

(Overheated steam shield form 2)
FIG. 3 is a schematic diagram of the shape of the superheated steam shield according to the second embodiment of the heating device of the present invention. In FIG. 3, the same components as those in FIG.

  In FIG. 3, the side surface of the superheated steam shield 102 is a louver 301 as shown by the arrow A, and has a structure in which superheated steam can be taken in from the side surface.

  The superheated steam shield form 2 is superior to the superheated steam shield form 1 when the object to be heated 101 is positively heated with the heat of the superheated steam.

(Overheated steam shield form 3)
FIG. 4 is a schematic diagram of the shape of the superheated steam shield according to the second embodiment of the heating device of the present invention. 4, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 4, the bottom surface of the superheated steam shield 102 has a shape like an inverted quadrangular pyramid, and has a structure in which superheated steam from the superheated steam supply port 112 easily flows toward the exhaust port 113. The side surface has a lattice-like or punching metal 201 structure as shown by the arrow A, and has a structure in which superheated steam can be taken from the side surface.

  Note that the superheated steam shield mode 3 is superior to the superheated steam shield modes 1 and 2 when superheated steam flows from the superheated steam supply port 112 to the exhaust port 113 more efficiently.

(Superheated steam shield form 4)
FIG. 5 is a schematic diagram of the shape of the superheated steam shield according to the second embodiment of the heating device of the present invention. 5, the same components as those in FIGS. 1 and 3 are denoted by the same reference numerals, and the description thereof is omitted.

  In FIG. 5, the bottom surface of the superheated steam shield 102 has a shape like an inverted quadrangular pyramid, and has a structure in which superheated steam from the superheated steam supply port 112 easily flows toward the exhaust port 113. The side surface has a structure like a louver 301 as shown by the arrow A, and has a structure in which superheated steam can be taken in from the side surface.

  The superheated steam shield form 4 is superior to the superheated steam shield form 1 and form 2 when the superheated steam is allowed to flow from the superheated steam supply port 112 to the exhaust port 113 more efficiently. It is superior to the case where the object to be heated 101 is positively heated by the heat of superheated steam.

  The heating device of the present invention has a heating function that is compact and does not require an inert gas such as nitrogen, and can be applied to the production of aluminum heat exchangers such as automobile radiators and air conditioner condensers.

DESCRIPTION OF SYMBOLS 100 Heating chamber 101 Heating object 102 Superheated steam shield 103 Work holding stand 104 Temperature probe 105 Coil 106 High frequency induction heater 107 Superheated steam generator 108 Exhaust device 109 Heater control device 110 Heater 111 Heating control device 112 Superheated steam supply port 113 Exhaust port 114 Temperature probe 201 Lattice or punching metal 301 Louver

Claims (4)

A heating chamber for storing an object to be heated;
A superheated steam generator for supplying superheated steam from a supply port provided in a lower portion of the heating chamber;
An exhaust device for exhausting air from an exhaust port provided on the upper surface of the heating chamber;
A work holding stand provided inside the heating chamber and holding the heating object;
A coil disposed so as to surround the work holding table;
An overheated steam shield disposed outside the coil;
In a heating device comprising a heater disposed on a wall surface of the heating chamber,
A high-frequency induction heater for controlling high-frequency induction heating by passing a high-frequency current through the coil;
A heater control device for controlling the temperature of the heater;
A temperature measuring device for monitoring the temperature of the heating chamber and the temperature of the object to be heated;
A temperature control device for controlling the superheated steam generator and the high frequency induction heater from the data of the temperature measuring device,
A heating device characterized by. The heating apparatus according to claim 1, wherein the superheated steam shield is made of any material of ceramics and ferrite. The shape of the superheated steam shield is a shape obtained by rotating a U-shape by 90 degrees to the right, or a shape obtained by rotating the U-shape by 90 degrees to the right to form a V-shaped base. Or the heating apparatus of 2. The heating device according to any one of claims 1 to 3, wherein a side surface of the superheated steam shield is a lattice-shaped hole or a louver structure.

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