JPH07256448A - Production of vessel of pan, pot, kettle and the other - Google Patents

Abstract

PURPOSE:To excellently weld in a production of a vessel to weld by butting a bottom member and a drum member. CONSTITUTION:In a jig 11 which fits a bottom member 3 and a drum member 4 by making them in a butting state, a heat transfer member 14 with a large thermal conductivity is installed at a part facing the butting parts 5, 6. The butting parts 5, 6 are heated with a welding burner 21 and welded. Therefore, because the temperature distribution of the butting parts 5, 6 in a welding time can be uniformly made, welding can be excellently executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing containers such as pots and kettles.

[0002]

2. Description of the Related Art Generally, in a hotel, a restaurant, a Japanese restaurant, etc., it is necessary for a hot pot to be served in front of a customer to have a high-class feeling.
For this reason, copper pots with a unique luster are widely used. By the way, in recent years, an electromagnetic cooker capable of cooking without using fire is widely used, but the copper pot cannot be used because it has no magnetism.

For this purpose, a pot is conceivable in which the bottom of the container is formed of a magnetic bottom member such as iron, the body of the container is formed of copper, and the bottom member and the body member are butt-welded together.

[0004]

However, since copper has a higher thermal conductivity than iron or the like, when the bottom member and the body member are butted and welded, the butted portion has a uniform temperature distribution. Therefore, there is a problem that good welding cannot be performed as a result.

Therefore, the present invention solves the above problem and forms at least the bottom of the container by a magnetic bottom member,
In the method of manufacturing a container such as a pot or a kettle in which the body of the container is formed from a body member having a thermal conductivity larger than that of the bottom member and the bottom member and the body member are butt-welded together, the welding is preferably performed. It is an object of the present invention to provide a method for producing containers such as pots and kettles that can be used.

[0006]

According to a first aspect of the present invention, there is provided a method for manufacturing a container such as a pot or a kettle in which at least the bottom of the container is formed of a magnetic bottom member, and the body of the container is heated from the bottom member. A method of manufacturing a container, such as a pot or a kettle, which is formed of a body member having high conductivity and in which the bottom member and the body member are butted and welded to each other, wherein the bottom member and the body member are fitted in a butt state. The holding jig to be joined is provided with a heat transfer member having a large thermal conductivity at a portion facing the abutting portion, and the abutting portion is welded by heating from the inside of the abutting portion.

According to a second aspect of the present invention, there is provided a method for manufacturing a container such as a pot or a kettle in which at least the bottom of the container is formed of a magnetic bottom member, and the body of the container has a higher thermal conductivity than the bottom member. A method of manufacturing a container such as a pot or a kettle in which the bottom member and the body member are butted and welded to each other, the holding member having the bottom member and the body member fitted to each other in the butted state. The tool is characterized in that a heat transfer member having a large thermal conductivity is provided at a portion facing the butt portion, and the butt portion is welded by heating from the outside of the butt portion.

[0008]

According to the structure of the first aspect, the body member has a high thermal conductivity and therefore the heat is swirled quickly, whereas the bottom member has a low thermal conductivity and therefore the heat is slow. Therefore, the butted portion will not have a uniform temperature distribution,
The heat of the butt portion is transferred to the bottom member side by the heat transfer member, so that the butt portion has a uniform temperature distribution and good welding can be performed.

According to the structure of the second aspect, the body member has high heat conductivity so that the heat is quickly rotated, while the bottom member has low heat conductivity and therefore, the heat is slowly rotated. Therefore,
The butt portion does not have a uniform temperature distribution, but the heat on the butt portion side is transferred to the bottom member side by the heat transfer member, and the butt portion has a uniform temperature distribution and welds well. be able to.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. The pot 1, which is a container, is composed of a bottom member 3 having a rising wall 2 on the outer circumference, and a substantially cylindrical body portion 4 that is connected to the rising wall 2. The bottom member 3 is made of a magnetic material that is magnetized when placed in a magnetic field, for example, steel such as iron and stainless steel (thermal conductivity 18 kcal / mh ° C.), or aluminum sandwiched between iron or steel and superposed. It is formed of a clad material or the like. In particular, stainless steel has excellent corrosion resistance, and the superposed materials have excellent thermal conductivity. Further, the body member 4 is made of a material having a higher thermal conductivity than the material of the bottom member 3, such as copper (heat conductivity of 0.94 cal / c).
ms), copper alloy, aluminum or the like. In particular, when the body 4 is made of copper or a copper alloy, not only good thermal conductivity but also a unique luster can be obtained and a high-grade feeling can be obtained.

The butt portion 5 provided at the upper end of the rising wall 2 and the butt portion 6 provided at the lower end of the body member 4 are butted and welded.

A holding jig 11 made of iron or steel for manufacturing the pot 1 has a substantially similar shape which is slightly larger than the pot 1, and a rising wall 13 expands from the outer periphery of the bottom 12. Is provided. Further, the butting portion 5,
A heat transfer member 14 is provided on the rising wall 13 so as to face 6. The heat transfer member 14 is made of a material having a large thermal conductivity, such as copper and a copper alloy, and is provided in a strip shape.
The recess 15 is formed inside the rising wall 13 and is formed in the same plane. The heat transfer member
Reference numeral 14 is formed so that the length X on the rising wall 2 side is larger than the length Y on the body member 4 side.

Next, a method for manufacturing the pot 1 will be described. First, the bottom member 3 and the body member 4 are formed by pressing. It should be noted that the body member 4 may be formed by pressing a bottomed member once and then removing the bottom. Next, the bottom member 3 and the body member 4 are set in the jig 11. At this time, the bottom member 3 is fitted to the bottom portion 12 of the jig 11, and the butting portion 5,
6 so that they are in close contact with each other, and the body member 4 is further fitted to the rising wall 13 of the jig 11. The rising wall 2 and the body member 4 are formed so that the inner and outer surfaces thereof are flush with each other.

Next, the abutting portions 5, 6 for temporary fixing.
Spot welding is performed with a welding burner (not shown) at intervals. Then, the burner 21 for welding is arranged inside to weld the entire circumferences of the abutting portions 5, 6. At this time, the direction of the burner 21 is rotated or the jig 11 is rotated. At the time of this welding, the butting portions 5, 6 become hot due to the heat of the flame from the burner 21. However, since the heat conductivity is high on the butting portion 5 side, the heat travels quickly, but on the butting portion 6 side, the heat conduction occurs. Due to the low rate, heat travels slowly. Therefore, the butting portions 5 and 6 do not have a uniform temperature distribution, but the heat of the butting portion 5 side is transferred to the butting portion 6 side by the heat transfer member 14.
The butting portions 5 and 6 have a uniform temperature distribution and can be welded well. As a result, a single line-shaped welded portion 22 is formed at the abutting portions 5 and 6.

After this, the welded pot 1 is taken out, and a hammer is applied to the welded portion 22 to crush it, or a hammer is formed to make the welded portion 22 inconspicuous. Moreover, the welded part 22 is made inconspicuous by polishing. Thereafter, if necessary, the rising wall 2, the bottom member 3, and the body member 4 are plated with tin or the like (not shown) to make the welded portion 22 more inconspicuous and improve the appearance. be able to.

As described above, in the above-described embodiment, the jig 11 for fitting the bottom member 3 and the body member 4 to each other in the abutting state, has a large heat conductivity at the portion facing the abutting portions 5 and 6. By providing the member 14 and heating the butt portions 5, 6 from the inside of the butt portions 5, 6 by welding with the welding burner 21, the temperature distribution of the butt portions 5, 6 during welding can be made uniform. , Good welding can be done.

Further, since the heat transfer member 14 has a length Y on the butt section 6 side larger than a length X on the butt section 5 side, the heat of the butt section 5 is widely transferred to the butt section 6 side. Therefore, the temperature distribution of the abutting portions 5 and 6 during welding can be surely made uniform.

Further, by making the body member 4 of copper or copper alloy, it has a unique luster of copper, and it is possible to obtain a high-grade feeling most suitable for hotels, restaurants, restaurants, etc., and the bottom member 3 By using a magnetic material,
It can be used in electromagnetic cookers.

Next, a second embodiment of the present invention will be described with reference to FIG. The pot 1A, which is a container, is composed of a bottom member 3A having a rising wall 2A on the outer periphery thereof, and a substantially cylindrical body 4A continuously provided on the rising wall 2A. The bottom member 3A is formed of, for example, steel such as iron or stainless steel (heat conductivity 18 kcal / mh ° C.), or aluminum, or a material in which steel is sandwiched and overlapped. In particular, stainless steel has excellent corrosion resistance, and the superposed stainless steel has excellent thermal conductivity. The body member 4A is made of a material having a higher thermal conductivity than the material of the bottom member 3A, for example, copper (heat conductivity 0.94cal).
/ Cms ° C.), copper alloy, aluminum or the like. In particular, when the body portion 4A is made of copper or a copper alloy, not only the thermal conductivity is good, but also a unique luster is obtained and a high-class feeling can be obtained.

A butting portion 5A provided at the upper end of the rising wall 2A and a butting portion 6A provided at the lower end of the body member 4A are butted and welded.

A holding jig 11A made of iron or steel for manufacturing the pot 1A has a substantially similar shape which is slightly smaller than the pot 1A, and has a rising wall 13A from the outer periphery of the bottom 12A.
Are provided so as to expand the diameter. Further, a heat transfer member 14A is provided on the rising wall 13A so as to face the butting portions 5A and 6A. The heat transfer member 14A is made of a material having a high thermal conductivity, for example, copper or a copper alloy, and is provided in a strip shape. The heat transfer member 14A is fitted in the recess 15A formed outside the rising wall 13A and has the same surface. It is formed into a shape. The heat transfer member 14A is formed so that the length X on the rising wall 2A side is larger than the length Y on the body member 4A side.

Next, a method of manufacturing the pot 1A will be described. First, the bottom member 3A and the body member 4A are formed by pressing. It should be noted that the body member 4A may be formed by pressing a bottomed member and then removing the bottom. Next jig
The bottom member 3A and the body member 4A are set on the outside of 11A. At this time, the bottom member 3A is fitted to the bottom portion 12A of the jig 11A, and the body member 4A is fitted to the rising wall 13A of the jig 11A so that the abutting portions 5A and 6A are in close contact with each other. To During the fitting, the bottom member 3A and the body member 4A are held by a holding tool (not shown) such as a clamp.

Next, the abutting portion 5A, for temporary fixing,
6A welding burners spaced apart (not shown)
Spot welding. Then, a burner 21A for welding is arranged on the outside to weld the entire circumference of the abutting portions 5A, 6A. At this time, the direction of the burner 21A is rotated or the jig 11A is rotated. At the time of this welding, the butt portion 5 is caused by the heat of the flame from the burner 21A.
Although the temperature of A and 6A becomes high, the heat around the abutting portion 5A is high because the heat conductivity is high, but the heat around the abutting portion 6A is low because the heat conductivity is low. Therefore, the heat on the butt portion 5A side is transferred to the butt portion 6A side by the heat transfer member 14A, and the butt portions 5A and 6A have a uniform temperature distribution and can be welded well. As a result, a single line welded portion is formed at the butting portions 5A and 6A.
22A is to be formed.

After that, the welded pot 1A is taken out,
A wrench is applied to the welded portion 22A to crush it, or a hammer is formed to make the welded portion 22A inconspicuous. Also, the welded portion 22A is made inconspicuous by polishing. Thereafter, if necessary, plating (not shown) such as tin is applied to the inside of the rising wall 2A, the bottom member 3A, and the body member 4A to make the welded portion 22A more inconspicuous and improve the appearance. be able to.

As described above, in the above embodiment, the bottom member 3A is used.
11A for fitting the body member 4A and the body member 4A to each other in an abutted state
In addition, a heat transfer member 14A having a high thermal conductivity is provided in a portion facing the abutting portions 5A and 6A, and the abutting portions 5A and 6A are provided.
By heating the abutting portions 5A and 6A by heating from the inside of A with the welding burner 21A, the temperature distribution of the abutting portions 5A and 6A during welding can be made uniform, and good welding can be performed. Moreover, in the above embodiment, the welded portion
Since 22A is formed on the outer side of the pot 1, it is possible to easily perform processing with a hammer and processing such as polishing.

Further, the heat transfer member 14A has a butt portion 5A.
By making the length Y on the butt portion 6A side larger than the side length X, the heat of the butt portion 5A can be widely transferred to the butt portion 6A side, and the butt portion 5 during welding can be reliably performed.
The temperature distribution of A and 6A can be made uniform.

Further, when the body member 4A is made of copper or a copper alloy, it is possible to obtain a high-grade feeling with a unique luster of copper, and the bottom member 3A is made of a magnetic material, so that electromagnetic Can be used in cookers.

The present invention is not limited to the above-described embodiment, but may be, for example, a kettle or the like, and only the bottom portion is made of a magnetic material, and the body portion rising from there is thermally conducted from the bottom member. Various modifications are possible such as being formed of a material having a high rate. Although the burner is shown as the welding means in the embodiments, electric welding means or laser welding may be used.

[0029]

According to the method of manufacturing a container for pots, kettles, etc. of claim 1, at least the bottom of the container is formed of a magnetic bottom member, and the body of the container has a higher thermal conductivity than the bottom member. A method of manufacturing a container, such as a pot or a kettle, which is formed from a body member and in which the bottom member and the body member are butted and welded to each other, for holding the bottom member and the body member in an abutted state inwardly. In the jig, a heat transfer member having a large thermal conductivity is provided at a portion facing the butt portion, and the butt portion is welded by heating from the inside of the butt portion,
The heat of the butt portion is transferred to the bottom member side by the heat transfer member,
The butted portion has a uniform temperature distribution and can be welded well.

According to a second aspect of the present invention, there is provided a method for manufacturing a container such as pots and kettles, in which at least the bottom of the container is formed of a magnetic bottom member, and the body of the container has a higher thermal conductivity than the bottom member. A method of manufacturing a container such as a pot or a kettle in which the bottom member and the body member are butted and welded to each other, the holding member having the bottom member and the body member fitted to each other in the butted state. The tool is provided with a heat transfer member having a large thermal conductivity at a portion facing the butted portion, and heats the butted portion from outside the butted portion to weld the butted portion. Heat is transferred to the bottom member side, the butt portion has a uniform temperature distribution and good welding can be performed, and since the weld portion appears on the outside, post-processing such as polishing after welding is easily performed. be able to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

 1 1A Pan (container) 3 3A Bottom member 4 4A Body member 5 5A 6 6A Butt part 11 Jig 14 Heat transfer member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location // B23K 103: 22

Claims (2)

[Claims] 1. At least the bottom of the container is formed of a magnetic bottom member, and the body of the container is formed of a body member having a thermal conductivity higher than that of the bottom member, and the bottom member and the body member are abutted to each other. A method for manufacturing containers such as welded pots and kettles, in which a holding jig for fitting the bottom member and the body member inside in a butt state, has a thermal conductivity at a portion facing the butt portion. A heat transfer member having a large size is provided, and the butt portion is welded by heating from the inside of the butt portion, and a method for manufacturing containers such as pots and kettles. 2. At least the bottom of the container is formed of a magnetic bottom member, and the body of the container is formed of a body member having a higher thermal conductivity than the bottom member, and the bottom member and the body member are abutted to each other. A method for manufacturing containers such as welded pots and kettles, in which a holding jig for fitting the bottom member and the body member to each other in an abutting state has a thermal conductivity at a portion facing the abutting portion. A heat transfer member having a large size is provided, and the butt portion is welded by heating from the outside of the butt portion, and a method for manufacturing a container such as pots and kettles.