KR101934001B1 - High frequency welding method for noble metals - Google Patents

Abstract

The present invention relates to a high frequency welding method for precious metals which is advantageous for mass production since a number of precious metal connection portions can be welded at once. That is, the present invention includes a plurality of graphite trays. After that, a plurality of precious metals (for instance, precious metal pins and precious metal rings) are arranged on the graphite trays, and then, solder is arranged at the connection portions of the precious metals. After that, high frequency is applied to the graphite trays in a state where the graphite trays are piled up. Then, the graphite trays generate heat by the high frequency and the solder arranged at the connection portions of the precious metals is melted by heat to be easily fused. Finally, the high frequency welding method is advantageous for mass production since a number of the precious metal connection portions are welded at the same time.

Description

Technical Field [0001] The present invention relates to a high frequency welding method for noble metals,

The present invention relates to a high frequency welding method for a noble metal, more particularly, to a method of welding a noble metal by using a high frequency welding method, and a noble metal can be welded at a time, To a high frequency welding method for a precious metal.

Generally, a method of manufacturing a noble metal ornaments includes a step of producing a noble metal having a desired shape through a casting process, a step of processing the produced noble metal (for example, a noble metal pin and a noble metal ring) into a desired shape or shape, And a solder welding process for soldering a connection portion between a noble metal (e.g., a noble metal pin and a noble metal ring).

However, in the process of welding the connection portion of the noble metal by using solder, there is a need for skilled soldering skilled workers, and also there is a problem of reproducibility in which a product of the same quality can not be obtained according to skill of a skilled worker. Especially, the worker has to solder the precious metal one by one There is a disadvantage that it is disadvantageous to mass production due to an increase in the time required for the water treatment according to the increase in the productivity and the economical efficiency.

Accordingly, an electric welder for automatically welding the connection portion of the noble metal outside the manual work of the operator is used, and such an electric welder is disclosed in Japanese Patent Application Laid-Open No. 10-2003-0064691.

Generally, the noble metal welding method using the electric welding machine includes a process of transferring a noble metal through a belt, a process of reaching a current applying portion located at an intermediate portion of the belt, a process of applying a noble metal to the noble metal The solder is melted and fused.

However, in the conventional welding method using the electric welding machine, since a large amount of current is instantaneously outputted at the current application portion, there is a problem that defects such as the formation of holes in the noble metal of the flexible material due to the heat due to the instantaneous current increase occur Similarly, there is a limit in welding a large amount of precious metals at a time as the noble metal passes through the current application portion along the belt by aligning the heat.

Open Patent No. 10-2008-0084522 (September 19, 2008) Open Patent No. 10-2003-0064691 (2003.08.02)

Disclosure of the Invention The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method for manufacturing a graphite tray having a plurality of graphite trays and then arranging a plurality of precious metals (e.g., precious metal pins and precious metal rings) The graphite tray is heated by the high frequency and the solder disposed at the connection portion of each noble metal is heated by the heat. And it is an object of the present invention to provide a high frequency welding method for a precious metal which is very advantageous for mass production because it can be easily welded while melting and can simultaneously weld a large number of precious metal connection parts at the same time.

In order to achieve the above object, the present invention provides a method for manufacturing a honeycomb structure, comprising: providing a plurality of precious metal mounting grooves machined into a shape of a precious metal; Placing two pieces of noble metal to be welded in the noble metal seating groove portion of the graphite tray and placing a solder as a kind of welding material in a noble metal boundary portion of two pieces; Stacking a plurality of graphite trays on which the noble metal to be welded is placed, and placing the graphite trays in a high frequency heating chamber; And heating the graphite tray by applying a high frequency to the graphite tray, and welding the noble metal connecting portion while melting the solder placed on the connecting portion of the noble metal placed on the graphite tray; The present invention also provides a high frequency welding method for a precious metal.

Preferably, when the graphite tray is stacked in the high-frequency heating chamber, the graphite tray is disposed inside a hollow high-frequency heating tower in which a high-frequency generating coil is placed, and high frequency is applied from the high- .

Particularly, before the high frequency is applied to the graphite tray, the vacuum suction step of removing the internal oxygen of the high frequency heating chamber and the step of injecting nitrogen into the high frequency heating chamber proceed, and the inside of the high frequency heating chamber 20 is evacuated to a vacuum nitrogen atmosphere As shown in FIG.

Preferably, the high frequency generating coil for applying a high frequency to the graphite tray is adopted as a copper tube, and after the step of welding the connection portion of the noble metal is completed, the cooling water is circulated from the cooling water circulation supply means into the copper tube, The step of cooling the tray and the noble metal is further performed.

Through the above-mentioned means for solving the problems, the present invention provides the following effects.

First, a plurality of noble metals (for example, noble metal fins and noble metal rings) are disposed on a graphite tray, solder is disposed at a connection portion of each noble metal, and then a plurality of graphite trays are laminated, The tray is heated by the high frequency and the solder disposed at the connecting portion of each noble metal can be easily fused while melting.

Second, since a large number of noble metal connection parts at a time (for example, a connection part between a noble metal pin and a precious metal ring) can be simultaneously welded by using a high frequency, it is advantageous for mass production of precious metal welding products.

1 is a front sectional view showing a welding apparatus for a high frequency welding method for a precious metal according to the present invention,
2 is a side sectional view showing a welding apparatus for a high frequency welding method for a precious metal according to the present invention,
3 is a plan view showing a welding apparatus for a high frequency welding method for a precious metal according to the present invention,
4 is a schematic view showing a process of welding a connection portion of a noble metal by a high frequency welding method for a noble metal according to the present invention,
5 is a front sectional view showing a state in which a sealing lid is opened and a graphite tray is raised in a welding apparatus for a high-frequency welding method for a precious metal according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show a welding apparatus for a high frequency welding method for a noble metal according to the present invention. In each figure, reference numeral 10 denotes a support frame to which the respective components of the high frequency welding apparatus for noble metal are supported and mounted .

A high frequency heating chamber 20 having a predetermined volume is hermetically mounted in a lower portion of the support frame 10 and a high frequency generator 30 is mounted in the high frequency heating chamber 20.

More specifically, the high-frequency generator 30 includes a hollow high-frequency heating tower 32 vertically erected and fixed to the bottom of the high-frequency heating chamber 20, And a high-frequency generating coil 34 for generating substantial high-frequency waves.

A high frequency applying line 36 is connected to the high frequency generating coil 34 and a high frequency applying line entering port 22 through which the high frequency applying line 36 enters is formed at one side of the high frequency heating chamber 20 .

When a high frequency current is applied to the high frequency applying line 36 from an external high frequency power supply device (not shown), a high frequency current is applied from the high frequency applying line 36 to the high frequency generating coil 34, And the high frequency is generated in the generating coil (34).

At this time, an air cylinder 40 is mounted on the bottom of the high frequency heating chamber 20, and the air cylinder 40 is connected to the bottom of the high frequency heating chamber 20, The piston rod 42 is airtightly inserted.

A cradle 44 disposed inside the high-frequency heating tower 32 is mounted on the upper end of the piston rod 42 which has entered into the high-frequency heating chamber 20 in such a manner that the graphite tray 50 can be stacked thereon .

When the piston rod 42 is lifted or lowered by the driving of the air cylinder 40, the holder 44 connected to the piston rod 42 is lifted or lowered in the internal space of the high-frequency heating tower 32 do.

In particular, a graphite tray 50 on which a plurality of noble metal targets 100 to be welded are placed is stacked on the cradle 44.

That is, the graphite tray 50 has a structure in which a plurality of noble metals 100 to be welded are seated, and a plurality of the noble metals 100 are stacked on the upper surface of the cradle 44.

At this time, a plurality of noble metal seating grooves 52, which are processed in the shape of the noble metal 100 to be welded, are formed on the upper surface of the graphite tray 50 at regular intervals.

More specifically, a plurality of noble metal seating grooves 52 on which a noble metal pin 102 and a noble metal ring 104 are seated are formed as a noble metal 100 to be welded on the upper surface of the graphite tray 50, And a solder, which is a welding material, is placed at a connection portion (boundary portion) between the noble metal pin 102 and the noble metal ring 104, as described later.

When a high frequency is applied to the graphite tray 50 in a state in which a plurality of the graphite trays 50 on which the plurality of noble metals 100 are placed are stacked on the cradle 44 in the upper and lower positions, The noble metal 100 can be welded at a time while the solder 110 placed on the connecting portion of the plurality of noble metals 100 seated on the graphite tray 50 is melted.

On the other hand, a driving shaft 62 for opening and closing the closing lid is mounted on one side of the upper side of the support frame 10 by means of a normal driving means such as an air cylinder and a motor, and the driving shaft 62 A sealing lid 60 for opening and closing the upper opening of the high frequency heating chamber 20 is connected via a connection link 64. [

At this time, a sealing member 66, which is in close contact with the upper opening of the high-frequency heating chamber 20, is mounted on the bottom edge of the sealing lid 60. When the noble metal 100 is welded by the high- And serves to maintain the inside of the high-frequency heating chamber 20 in a vacuum state.

A vacuum inlet 24 and a nitrogen inlet 26 for vacuuming the inside of the high frequency heating chamber 20 are formed on the other side of the high frequency heating chamber 20 in order to prevent oxidation of the graphite tray 50 .

More specifically, when oxygen is present around the graphite tray 50 due to the high frequency, the oxidation of the graphite tray 50 is promoted and the lifetime of the graphite tray 50 can be greatly shortened. Therefore, The inside of the high-frequency heating chamber 20 should be made to have a vacuum nitrogen atmosphere when the graphite tray 50 is heated. To this end, a vacuum inlet 24 And a nitrogen inlet 26 for injecting nitrogen into the high frequency heating chamber 20 is formed.

The high-frequency generating coil 34 is used as a conductive copper pipe. The cooling water circulating and supplying means 70 is connected to both ends of the copper pipe. When the noble metal welding process by high frequency is finished, Cooling of the solder portions of the graphite tray 50 and the noble metal 100 can be performed by allowing the cooling water from the supply means 70 to circulate.

Hereinafter, a noble metal high frequency welding method based on the high frequency welding apparatus for a noble metal according to the present invention will be described.

FIG. 4 is a schematic view illustrating a process of welding a connection portion of a noble metal by a welding apparatus for a high frequency welding method for a noble metal according to the present invention.

First, two pieces of noble metal 100 to be welded are placed on a plurality of noble metal seating grooves 52 formed on the upper surface of the graphite tray 50, and a solder 110, which is a kind of welding material, is placed on the noble metal interface of two pieces .

For example, the noble metal pin 102 and the noble metal ring 104 are seated in the noble metal seating groove 52, and solder, which is a welding material, is placed at the connection portion (boundary portion) between the noble metal pin 102 and the noble metal ring 104 .

At this time, the operator can place the noble metal 100 in the noble metal seating groove 52 of the graphite tray 50 and the operation of placing the solder 110 on the noble metal boundary of the two pieces, The grip of a conventional small robot arm connected to a machine can be automatically and repeatedly performed.

Next, a plurality of graphite trays 50 on which the noble metal 100 to be welded is placed are stacked on the cradle 44, and then the air cylinder 40 is driven to lower the piston rod 42, The state where the holder 44 connected to the piston rod 42 is lowered into the internal space of the high frequency heating tower 32 and the graphite tray 50 is disposed in the hollow high frequency heating tower 32 of the high frequency generator 30 do.

Subsequently, the upper opening of the high-frequency heating chamber 20 is sealed with the sealing lid 60, the inner oxygen of the high-frequency heating chamber 20 is removed through the vacuum suction port 24, and nitrogen The inside of the high frequency heating chamber 20 is made to be a vacuum nitrogen atmosphere for preventing oxidation of the graphite tray.

Next, when a high-frequency current is applied to the high-frequency applying line 36 from the high-frequency power supply device (not shown) disposed outside, a high-frequency current is applied from the high-frequency applying line 36 to the high- A high frequency is generated in the high frequency generating coil 34.

The graphite tray 50 is heated by the high frequency generated by the high frequency generating coil 34 and the solder 110 placed on the connecting portion of the noble metal 100 mounted on the graphite tray 50 melts, The connecting portion of the welding wire 100 is easily welded.

When a high frequency is applied to the graphite tray 50 in a state in which a plurality of the graphite trays 50 on which the plurality of noble metals 100 are placed are stacked on the cradle 44 in the upper and lower positions, The noble metal 100 can be welded at a time while the solder 110 placed on the connecting portion of the plurality of noble metals 100 seated on the graphite tray 50 is melted.

In this way, it is possible to simultaneously weld a large number of noble metal joints (eg, joints between noble metal pins and noble metal rings) at the same time using a high frequency wave, thereby reducing labor and air pollution and providing mass production of precious metal welded products can do.

When the noble metal welding process is completed as described above, the graphite tray 50 and the noble metal 100 are in a high-temperature state. Therefore, it is necessary to cool the product to a temperature for taking out the product. For this purpose, Cooling of the solder portions of the graphite tray 50 and the noble metal 100 can be performed by allowing the cooling water from the cooling water circulating and supplying means 70 to be circulated and supplied to the inside of the copper tube adopted as the cooling water circulating means.

5, when the piston rod 42 is lifted and operated by reversely driving the air cylinder 40 after the sealing lid 60 is opened, the cradle (not shown) connected to the piston rod 42 44 are raised and lowered above the inner space of the high frequency heating tower 32 and the graphite tray 50 is elevated and withdrawn to the outside of the high frequency heating chamber 20 so that the operator takes out the graphite tray 50, So that the welded precious metal product is separated from the train 50.

As described above, according to the present invention, a high frequency is applied while a plurality of graphite trays 50 are laminated so that the graphite tray 50 generates heat by the high frequency and the solder 110) of the precious metal can be easily welded while melting the precious metal, so that a large number of noble metal connection parts (for example, a connection part between the noble metal pin and the noble metal ring) can be simultaneously welded at a high frequency, It provides a very advantageous advantage for mass production of products.

On the other hand, the corrosion inhibiting coating layer may be applied to the drive shaft 62 for opening and closing the closed lid. The coating material of the corrosion inhibiting coating layer may be 20 wt% of a tolyl triazole, 15 wt% of benzimidazole, 10% by weight of trioctylamine, 15% by weight of hafnium and 40% by weight of aluminum oxide, and the coating thickness is 8 μm.

Toluetriazole, benzimizazole, and trioctylamine serve to prevent corrosion and prevent discoloration.

Hafnium is a corrosion-resistant transition metal element that plays a role in providing excellent waterproofness and corrosion resistance.

 Aluminum oxide is added for the purpose of refractoriness and chemical stability.

The reason why the ratio of the constituent components and the thickness of the coating are limited as described above is that the present inventor has analyzed through several test results, and as a result, showed the optimum corrosion inhibiting effect at the above ratios.

In addition, the graphite tray 50 may be provided with an anti-fouling coating layer coated with a composition for preventing fouling to effectively prevent and remove the adhesion of the fouling material.

The anti-contamination coating composition contains alkanolamide and amphopropionate in a molar ratio of 1: 0.01 to 1: 2, and the total content of alkanolamide and amphopropionate is 1 to 10 Weight%.

The molar ratio of alkanolamide and amphopropionate is preferably in the range of 1: 0.01 to 1: 2. When the molar ratio is out of the range, the coating property of the base material is lowered or the moisture adsorption on the surface is increased, There is a problem to be removed.

The alkanolamide and amphopropionate are preferably used in an amount of 1 to 10% by weight in the aqueous solution of the total composition. When the amount is less than 1% by weight, the applicability of the base material is deteriorated. When the amount is more than 10% by weight, So that crystal precipitation is likely to occur.

On the other hand, as a method of applying the present anti-fouling coating composition onto the graphite tray 50, it is preferable to coat it by spraying. In addition, the thickness of the final coated film on the graphite tray 50 is preferably 500 to 2000 angstroms, more preferably 1000 to 2000 angstroms. When the thickness of the coating film is less than 500 ANGSTROM, there is a problem that it deteriorates in the case of a high-temperature heat treatment. When the thickness is more than 2000 ANGSTROM, crystallization of a coated surface tends to occur.

The anti-contamination coating composition may be prepared by adding 0.1 mol of alkanolamide and 0.05 mol of amphopropionate to 1000 mL of distilled water, followed by stirring.

The sealing member 66 may be made of a rubber material. The raw material content ratio of the sealing member 66 may be 60 wt% of rubber, 33-36 wt% of carbon black, 2-5 wt% of antioxidant, 1 to 3% by weight of sulfur is mixed.

When the content is less than 33% by weight, the elasticity and abrasion resistance are reduced. When the content is more than 36% by weight, the rubber content of the main component is relatively small and the elasticity may be lowered. , And 33 to 36% by weight.

The antioxidant is selected from 3C (N-PHENYL-N'-ISOPROPYL-P-PHENYLENEDIAMINE) or RD (POLYMERIZED 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE) If the content is less than 5% by weight, the content of the rubber as a main component may be relatively small and the elasticity may be lowered. Further, since the cost of the antioxidant is high, To 5% by weight is appropriate.

Sulfur, which is an accelerator, is mixed in an amount of 1 to 3% by weight. When less than 1% by weight, the effect of vulcanization is insignificant in the heating process during molding, so 1% by weight or more is added. If the content is more than 3% by weight, the content of the rubber as the main component may be relatively small and the elasticity may be lowered. Therefore, 1 to 3% by weight is appropriate.

Accordingly, since the present invention is reinforced with synthetic rubber having elasticity in various directions, the elasticity, toughness and rigidity of the sealing member 66 are increased, thereby improving the durability and thus the service life of the sealing member 66 is increased.

In addition, the outer surface of the case of the high-frequency heating chamber 20 can be coated with a discoloring portion whose color changes according to the temperature. This discoloring portion is applied to the case surface of the high-frequency heating chamber 20 by separating two or more temperature-color-changing substances whose color changes when the temperature becomes a predetermined temperature or more into two or more intervals according to the temperature change, And a protective film layer is applied on the discolored portion to prevent the discolored portion from being damaged.

Here, the discoloring portion may be formed by applying a temperature discoloring material having a discoloration temperature of not less than 40 DEG C and not less than 60 DEG C, respectively. The discoloring portion is for detecting a change in the temperature of the paint due to the color change depending on the case temperature of the high frequency heating chamber 20. [

The discoloring unit may be formed by applying a temperature-coloring material whose color changes when the temperature of the discoloring unit becomes a predetermined temperature or more to the surface of the case of the high-frequency heating chamber 20. [ In addition, the temperature discoloring substance is generally composed of a microcapsule structure having a size of 1 to 10 탆, and the microcapsules can exhibit a colored and transparent color due to the bonding and separation phenomenon depending on the temperature of the electron donor and the electron acceptor.

In addition, the temperature-changing materials can change color quickly and have various coloring temperatures such as 40 ° C, 60 ° C, 70 ° C, and 80 ° C, and such coloring temperature can be easily adjusted by various methods. Such a temperature-coloring material may be various kinds of temperature-coloring materials based on principles such as molecular rearrangement of an organic compound and spatial rearrangement of an atomic group.

For this purpose, it is preferable that the discoloring unit is formed so as to be divided into two or more sections according to the temperature change by applying two or more temperature-coloring materials having different discoloration temperatures. The temperature-coloring layer preferably uses a temperature-coloring material having a relatively low temperature of the discoloration temperature and a temperature-discoloring material having a relatively high discoloration temperature, more preferably a discoloration temperature of not lower than 40 ° C and not lower than 60 ° C A color change portion can be formed by using a temperature coloring material.

Accordingly, the change in temperature of the high-frequency heating chamber 20 can be detected step by step, thereby detecting the change in the temperature of the paint. Accordingly, the high-frequency heating chamber 20 can be operated in an optimum state, So that damage to the heating chamber 20 can be prevented in advance.

In addition, the protective film layer is coated on the discolored portion, thereby preventing the discolored portion from being damaged due to external impact, easily recognizing discoloration of the discolored portion, and considering the weakness of the temperature discolored material, Is preferably used.

Further, since the sealing lid 60 is coated with a fragrance material having a function of treating respiratory diseases, etc., it has effects on the user's fatigue recovery and health promotion.

The functional oil may be mixed with 95 to 97% by weight of a perfume, 3 to 5% by weight of a functional oil, 50% by weight of a functional oil, 50% by weight of a tangerine oil, And 50% by weight of palmitoleic acid oil.

Here, the functional oil is preferably mixed with 3 to 5% by weight based on the perfume. If the mixing ratio of the functional oil is less than 3% by weight, the effect is insignificant. If the mixing ratio of the functional oil exceeds 3 to 5% by weight, the function is not greatly improved, but the manufacturing cost is greatly increased.

Tangerine oil in functional oil is citronellol, linalool, cital, etc. It has good effect on relieving stress by preserving, shaking and sedating.

 Palmitoleic acid oil is antioxidant, good for dry or aged skin, and has excellent effects on cell regeneration, sterilization, skin inflammation treatment.

As the functional oil is coated on the sealing lid 60, it contributes to recovery of fatigue and health improvement of the operator.

10: Support frame
20: High frequency heating chamber
22: High frequency line entry
24: Vacuum suction inlet
26: Nitrogen inlet
30: High frequency generator
32: High frequency heating tower
34: High frequency generating coil
36: High frequency application line
40: Air cylinder
42: Piston rod
44: Cradle
50: Graphite tray
52: noble metal seating groove
60: sealing lid
62: Drive shaft for closing and closing the lid
64: connection link
66: sealing member
70: cooling water circulation supply means
100: Precious metal
102: Precious metal pin
104: Precious metal ring
110: solder

Claims (3)

A support frame (10); A high frequency heating chamber (20) hermetically mounted on a lower portion of the support frame (10); A high frequency generator (30) having a structure in which a high frequency generating coil (34) is wound inside a hollow type high frequency heating tower (32) and installed in the high frequency heating chamber (20); A cradle (44) mounted on a piston rod (42) mounted through the bottom of the high - frequency heating chamber (20) and arranged so as to be able to move up and down within the high frequency heating tower (32); An air cylinder (40) mounted on the bottom of the high frequency heating chamber (20) while being connected to the lower end of the piston rod (42); A plurality of graphite trays (50) stacked on the upper surface of the cradle (44), the plurality of graphite trays being provided in a structure in which a plurality of noble metal targets to be welded are seated; A driving shaft (62) for closing and opening the sealing lid mounted on one side of the upper portion of the support frame (10); A sealing lid 60 connected to the drive shaft 62 for opening and closing the lid by a connection link 64 to open and close the upper opening of the high frequency heating chamber 20;
On the upper surface of the graphite tray 50, a plurality of noble metal seating grooves 52 formed in the shape of a noble metal 100 are formed at regular intervals;
A high frequency applying line 36 is connected to the high frequency generating coil 34 and a high frequency applying line entrance 22 through which the high frequency applying line 36 enters is formed at one side of the high frequency heating chamber 20;
A vacuum inlet 24 and a nitrogen inlet 26 for vacuuming the inside of the high frequency heating chamber 20 are formed on the other side of the high frequency heating chamber 20 to prevent oxidation of the graphite tray 50;
The high-frequency generating coil 34 is adopted as a copper tube, and cooling water circulating and supplying means 70 is connected to both end portions of the copper tube so as to cool the graphite tray and the noble metal at the time when the noble metal welding process is completed. And the cooling water is circulated and supplied to the heat exchanger;
The graphite tray 50 is heated by the high frequency generated in the high frequency generating coil 34 and the solder 110 placed on the connecting portion of the noble metal 100 mounted on the graphite tray 50 is melted and the noble metal 100 ) Are welded;
A sealing member (66) which is in close contact with the upper opening of the high-frequency heating chamber (20) is mounted on the bottom edge of the sealing lid (60);
The drive shaft 62 for opening and closing the hermetic lid is installed to move up and down and rotate by the driving means such as an air cylinder and a motor so as to lift and rotate the hermetic lid 60 and the connection link 64 in the horizontal direction;
The sealing lid 60 is provided on the upper side of the upper plate of the support frame 10 and the high frequency heating chamber 20 is provided on the upper side of the support frame 10, When the piston rod 42 is lifted up by reversing the air cylinder 40 after the sealing lid 60 is first opened, the holder 44 connected to the piston rod 42 is moved to the high- And the graphite tray 50 is drawn out of the high frequency heating chamber 20 to be exposed to the upper side of the upper frame of the support frame 10 while being raised to the upper space of the tower 32, As a high frequency welding method,
A step of providing a graphite tray (50) having a plurality of noble metal seating grooves (52) formed in a shape of a noble metal and formed at regular intervals;
Placing two pieces of noble metal (100) to be welded on a noble metal seating groove (50) of the graphite tray (50) and placing a solder (110)
Stacking a plurality of graphite trays (50) on which the noble metal (100) to be welded is placed, and placing them in the high frequency heating chamber (20); And
A high frequency is applied to the graphite tray 50 disposed in the high frequency heating chamber 20 to heat the respective graphite trays 50 and at the same time the solder 50 placed on the connecting portion of the noble metal 100 seated on each graphite tray 50 A step of welding a connection portion of a noble metal while melting the melt 110;
Wherein the high frequency welding method comprises the steps of:
The method according to claim 1,
When the graphite tray 50 is stacked in the high frequency heating chamber 20, the graphite tray 50 is disposed inside the hollow high frequency heating tower 32 in which the high frequency generating coil 34 is placed, And a high frequency is applied from the high frequency generating coil (34).
The method according to claim 1,
The vacuum suction step for removing the internal oxygen of the high frequency heating chamber 20 and the step for injecting nitrogen into the high frequency heating chamber 20 are performed before the high frequency is applied to the graphite tray 50, To a vacuum nitrogen atmosphere;
The high frequency generating coil 34 for applying a high frequency to the graphite tray 50 is adopted as a copper tube and after the step of welding the connecting portion of the noble metal 100 is completed, Wherein the step of cooling the graphite tray (50) and the noble metal (100) is performed by circulating the cooling water from the cooling water inlet (70).

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