JP2007160386A - Electric joining terminal, welding method using the terminal, and structure using the joining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal equipped with a storing part capable of storing a connecting part for connecting to a conducting wire or the like and molten metal, and also to provide a method and a structure for electrically connecting a conductive base material with a conductive wire or the like by using this terminal. <P>SOLUTION: A conductive wire 4 and the connecting part 3 of the terminal 1 are connected by pressure, with the conductive wire 4 and the terminal 1 arranged. In this instance, the orifice of the storing part 2 opposing the orifice closely adhering to a crucible 10 is in close contact with the surface of the electrically conductive base material, making the storing part hermetically sealed state except a notched part 5. Successively, with metal inside a combustion furnace 11 fused, and with the molten metal made to flow out to a runner 12, the molten metal flows in from the notched part 5 into the hollow part 6 of the storing part 2 through the runner 12. The molten metal is filled in the storing part 2, fusing the inner surface of the storing part 2 by heat. In the fused part on the inner surface, the molten metal and the member of the storing part 2 are mixed and in fused contact with each other, and then, after being cooled, they are melt-stuck to form the welded part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a novel electrical joining terminal and an electrical joining method using the terminal, and in particular, a terminal, a joining method, and a joining method for electrically joining a conductor and a conductive base material through a molten metal are used. It relates to structures.

  As a method for welding a conductive base material and another conductor such as an electric wire through a weld metal, there is a thermite welding method. Thermite welding ignites a mixed powder of aluminum and copper oxide (or iron oxide) near the surface of the base metal and melts copper (or iron) and a part of the base metal by the heat generated by the chemical reaction. Welding.

  The thermite welding method is generally performed by using a thermite welding apparatus called a crucible, and a conductive wire or the like is disposed in a predetermined-shaped housing portion that is integral with the crucible, and the conductive base material surface and the housing portion are disposed. The container is sealed to seal, and the molten metal generated in the crucible is poured into the container. After the molten metal is cooled, the weld metal formed in a predetermined shape is welded at the melted portion on the surface of the conductive base material, and the conductive wire and the like are fixed inside the welded portion. In this way, the conductive base material and the conducting wire or the like are electrically joined.

Hereinafter, general thermite welding will be described with reference to FIGS. In thermite welding, in order to expand the welding area with the thermit material, a welding terminal electrically connected to a conductor wire or the like is used, and a material having good affinity with the conductor wire or thermit material is selected.
FIG. 6 is a perspective view showing an example of the thermite welding apparatus. The thermite welding apparatus 10 ′ includes a combustion furnace 11 therein. Inside the combustion furnace 11, a hole communicating with the runner 12 is provided at the bottom, but the thermit material and the igniting agent are deposited in powder form by being blocked by a lid. The runner 12 is formed so as to be guided below the combustion furnace 11 and into the cavity 13. On the side of the cavity 13, a recess 15 is formed to accommodate the welding terminal 14 that is crimp-connected to the conductor 4, and communicates with the cavity 13. The cavity 13 and the recess 15 have an opening 16 that opens to the surface of a conductive base material (not shown), and when the welding terminal 14 is arranged at a predetermined position, one surface of the welding terminal 14 17 and the opening surface of the opening portion 16 are flush with each other, and the inside of the cavity portion 13 is completely sealed by bringing the surface into close contact with the surface of the conductive base material.

Subsequently, the ignition agent in the combustion furnace 11 is ignited to cause a combustion reaction in the thermite material, and the metal components constituting the thermite material are melted by the heat generated at this time. At the same time, the lid is melted, and the molten metal flows downward through the runner 12 and is guided to the cavity 13. Eventually, the molten metal is filled in the cavity 13 to cover a part of the welding terminal 14 disposed in the cavity 13 and welded via the molten part with the surface of the conductive base material. To do. After cooling, a welded portion having the shape of the cavity portion 13 is formed.
Japanese Patent No. 3619168

However, a general thermite welding apparatus has the following problems.
First, the cavity forming the welded portion is usually formed integrally with the thermite welding apparatus main body, and as shown in FIG. 7, a part of the portion forming the cavity of the thermite welding apparatus is worn or damaged. If it does, the sealing performance of the cavity part at the time of thermite welding will be impaired, and there exists a problem that a molten metal will leak.

Second, the surface area of the conductive base material and the welding terminal is limited in the area welded or welded to the weld metal welded with thermite depending on the position of the welding terminal into the cavity.
For example, when most of the welding terminals are arranged in the cavity, as shown in FIG. 8 (a), the fusion-bonding region 81 between the weld metal and the conductive base material surface becomes small, and fusion welding is performed. The strength tends to be insufficient. On the other hand, when only the tip of the welding terminal is disposed in the cavity, as shown in FIG. 8 (b), the fusion welding region 81 between the weld metal and the conductive base material surface becomes large, The welding area 82 between the weld metal and the welding terminal becomes small, and their welding strength tends to be insufficient. Generally, as shown in FIG. 8C, the fusion welding region 81 between the weld metal and the conductive base material surface is half of the contact surface between the weld metal and the conductive base material surface. Degree.

  The present invention relates to a terminal provided with a connecting portion connected to a conducting wire or the like and a housing portion capable of containing molten metal, and a method and structure for electrically joining a conductive base material to the conducting wire or the like using the terminal. The purpose is to provide.

(1) In order to achieve the above-mentioned object, the present invention is a terminal for joining a lead wire and a base material via a weld metal, and a housing part for housing a weld material to be a weld metal, And a connecting portion for connecting the conducting wire.
(2) Moreover, it is preferable that the said accommodating part in the terminal of this invention is formed in a cylinder shape so that the said weld metal may be covered in the circumferential direction.
(3) Of the two openings of the cylindrical housing portion in the terminal of the present invention, one opening portion opens with respect to the surface of the base material, and the other opening portion places the molten material in the housing portion. It is characterized by having an opening for supplying to the battery.
(4) Further, in the terminal of the present invention, one opening of the cylindrical housing portion opens with respect to the surface of the base material, and the molten material is supplied into the housing portion on the circumference of the housing portion. An opening is provided for the purpose.
(5) Moreover, the other opening part of the said cylindrical accommodating part in the terminal of this invention is obstruct | occluded, and the bottom part is formed.
(6) Moreover, the said connection part of the terminal of this invention can guide a conducting wire inside through an insertion hole, It is characterized by the above-mentioned.
(7) Moreover, the said hole of the said connection part in the terminal of this invention has penetrated the said bottom part, It is characterized by the above-mentioned.
(8) Further, the terminal of the present invention is for thermite welding.
(9) In order to achieve the above-mentioned object, the present invention uses a terminal provided with a housing portion for housing a metal and a connection portion for connecting to the conducting wire, and connects the conducting wire and the base material via a weld metal. A step of connecting the conducting wire and the connecting portion, and a step of supplying the molten metal into the housing portion.
(10) Furthermore, in order to achieve the above-described object, the structure according to the present invention uses a terminal provided with a connection portion to which a conductor is connected and a housing portion in which molten metal is housed, to provide electrical connection between the conductor and the conductor. Connected structure.
(11) Furthermore, in order to achieve the above-described object, the present invention is electrically connected to the lead wire using a terminal including a connection portion to which the lead wire is connected and a housing portion in which molten metal is accommodated. It is also possible to target railway rails having different structures.

Advantages of the Invention (1) A terminal according to the present invention has an accommodating portion for accommodating a molten material to be a weld metal and a connecting portion for connecting a conductive wire.
Therefore, since the terminal according to the present invention can be used as a fusion-welded region with the majority of the contact surface between the surface of the conductive base material and the weld metal as a fusion weld portion, the conductive base material and the weld metal In addition to improving the bonding strength and conductivity of the weld metal, the majority of the contact area between the weld metal and the inner surface of the housing portion can be used as a fusion weld region, so that the bond strength and conductivity between the weld metal and the terminal can be increased. It has the effect of improving the property. Accordingly, the bonding strength and conductivity between the conductive wire and the conductive base material can be improved.
(2) Since the terminal accommodating portion according to the present invention is formed in a cylindrical shape, the accommodating portion can be formed by casting of an arbitrary shape such as a cylinder or a rectangular tube in consideration of manufacturing cost and ease of manufacturing. It has the effect.
(3) In the terminal accommodating portion according to the present invention, one opening portion opens to the surface of the conductive base material, and the other opening portion opens to supply the molten material into the accommodating portion. Therefore, when performing electrical joining, one opening is brought into close contact with the surface of the conductive base material, and the surface having the molten metal runner outlet at the other opening is accommodated in the opening. When the molten metal is supplied from the runner into the accommodating portion, the lead wire and the conductive base material are electrically joined via the weld metal. Terminals can be provided. Further, the terminal can be easily manufactured.
(4) In the terminal accommodating portion according to the present invention, one opening portion opens to the surface of the conductive base material, and an opening for supplying the molten material into the accommodating portion on the circumference of the accommodating portion. When the electrical bonding is performed, one opening is brought into close contact with the surface of the conductive base material and sealed, and the other opening is brought into close contact with, for example, a part of a crucible or the like. Then, the conductive base material and the conductive wire are electrically joined to each other through the weld metal by flowing molten metal into the housing portion from a hole portion such as a notch provided on the circumference of the housing portion. Form terminals can be provided.
(5) In the terminal accommodating portion according to the present invention, one opening portion opens to the surface of the conductive base material, and an opening for supplying the molten material into the accommodating portion on the circumference of the accommodating portion. In addition to the provision of the portion, the other opening in the housing portion is closed to form the bottom, so as long as one opening is brought into close contact with the surface of the conductive base material, the supply of molten metal It is possible to provide a form of terminal which is in a sealed state except for the opening and electrically joins the conductive base material and the conductive wire through the weld metal by flowing molten metal from the supply port of the housing portion. .
(6) Since the connecting portion of the terminal according to the present invention can guide the conducting wire inside through the insertion hole, for example, by inserting the conducting wire into the connecting portion and then crimping, the conducting wire and the terminal are connected. An electrical connection is made. At that time, if the lead wire can be inserted into the housing portion, it will be in direct contact with the molten metal, so that electrical connection is ensured even if the housing portion is selected from a member having heat resistance and low conductivity. This has the effect of expanding the range of selection of the material for forming the accommodating portion.
(7) In the terminal according to the present invention, one opening of the housing portion opens to the surface of the conductive base material, the other opening is closed to form a bottom, and molten metal is supplied to the periphery. In the accommodating portion provided with the opening, if the insertion hole of the connecting portion penetrates the bottom portion of the accommodating portion, it is possible to insert the conductive wire into the connecting portion from a direction substantially perpendicular to the base material surface. The terminal of the form which can be provided can be provided.
(8) Since the terminal according to the present invention is used for thermite welding, it is possible to perform thermite welding with the molten metal housing portion sealed by using a predetermined thermite welding apparatus.
(9) Moreover, the electrical joining method according to the present invention includes a step of connecting a lead wire and a connection portion using a terminal provided with a storage portion for storing a metal and a connection portion for connecting to the conductive wire, and the inside of the storage portion. Supplying a molten metal to the substrate.
Therefore, the method of the present invention eliminates the need to provide a cavity for forming molten metal in the thermite welding apparatus, so that the combustion furnace and the runner are not affected even if damaged outside the thermite welding apparatus. It has the effect that it can be tolerated.
In the method of the present invention, most of the contact surface between the surface of the conductive base material and the weld metal can be used as a fusion weld region, and the contact between the weld metal and the housing portion. Since a large part of the area can be used as a fusion-bonding region, it is possible to provide a strong electrical bonding structure with excellent conductivity between the conductive base material, the terminal, and the weld metal. It has the effect of being able to.
Furthermore, the method of the present invention is not limited to thermite welding, and includes all of the technical ideas of electrically connecting two conductors by accommodating molten metal in the terminal accommodating portion.
(10) Since the structure electrically connected to the conductor according to the present invention uses a terminal provided with a connection portion to which the conductor is connected and a storage portion in which molten metal is stored, a novel joining is performed. Providing a structure, the contact area between the terminal and the molten metal and the fusion contact area between the structure and the molten metal can be increased as compared with the conventional structure, and the bonding strength and conductivity between the conductor and the structure can be increased. Improvements can be made. Moreover, it can be applied to other fields.
(11) Since the rail electrically connected to the conducting wire according to the present invention uses a terminal provided with a connecting portion to which the conducting wire is connected and an accommodating portion in which the molten metal is accommodated, the terminal and the molten metal The contact area and the fusion-bonding area between the rail and the molten metal are made larger than before, and the bonding strength and conductivity between the conductor and the rail are improved. The rail according to the present invention is an example in which it is applied in the railway field.

  The preferred embodiments of the present invention will be described with reference to the accompanying drawings. In each drawing, the same reference numerals are used for the same components, and the description thereof may be omitted as appropriate.

FIG. 1 shows an embodiment for performing electrical joining between a base material (not shown) made of a conductive member and a conducting wire 4 using a crucible 10 having a combustion furnace 11 and a runner 12 and a terminal 1 according to the present invention. The form is shown.
The combustion furnace 11 of the crucible 10 is filled with powdered metal and an igniter deposited on the upper layer.
The terminal 1 of the present invention is used to join the lead wire 4 and a base material (not shown) via a weld metal, and connects the housing portion 2 and the lead wire 4 for housing the weld material to be the weld metal. And a connecting portion 3 for this purpose. The accommodating part 2 needs to select the material which has heat resistance.
The accommodating portion 2 is formed in a cylindrical shape, and is formed in a cylindrical shape as an example in consideration of manufacturing cost and ease of manufacturing. In addition, the accommodating portion 2 is provided with a notch portion 5 having a width substantially equal to the runner 12 on the circumference thereof, and the notch portion 5 is inserted through the cavity portion 6 of the accommodating portion 2.
The connecting portion 3 has a hole that is inserted into the cavity portion 6 of the housing portion 2, and the conductive wire 4 is inserted and guided into the hole and is fixed by crimping at the connecting portion. The leading end of the conducting wire 4 may be projected to a position that is flush with the inner surface of the accommodating portion 2 or to the inside of the hollow portion 6. One of the opposing openings of the housing part opens to the surface of the base material, and the other opens to the surface 8 including the end of the runner 12 in the crucible 10 and is in close contact therewith.

  Next, an example of a method of joining the conductive wire 4 and a conductive base material (not shown) via a weld metal will be described. First, the conducting wire 4 and the connection part 3 of the terminal 1 are crimped and connected, and the conducting wire 4 and the terminal 1 are arranged as shown in FIG. However, although not shown, the opening portion of the housing portion 2 facing the opening portion in close contact with the crucible 10 is in close contact with the surface of the conductive base material, and the housing portion is in a sealed state except for the notch portion 5. Subsequently, the ignition agent is ignited to melt the metal in the combustion furnace 11, and the molten metal flows out to the runner 12. Then, the molten metal flows through the runner 12 from the notch 5 into the cavity 6 of the housing 2. The molten metal is filled in the housing part 2 and melts the inner surface of the housing part 2 with heat. At the melted portion of the inner surface, the molten metal and the member of the housing portion 2 are mixed and fused together, and after cooling, they are welded together to form a welded portion. Note that the crucible has heat resistance and is not melted by the weld metal, so it does not weld to the weld metal.

  In FIG. 2, the conductive base material is not shown, but the state where the conducting wire 4, the terminal 1 and the weld metal 7 are joined is illustrated. The weld metal 7 is fusion-bonded to the inner peripheral surface of the housing portion 2 together with the lead wire 4 in almost the entire region. Particularly, when the housing portion 2 is a highly conductive member, the welding wire 7 has a good electrical connection relationship. Have. However, even if the accommodating portion 2 is a member having low conductivity, the conductive wire 4 is inserted into the accommodating portion 2 and bonded to the weld metal 7, so that the electrical connection relationship is maintained.

FIGS. 3A to 3E illustrate various forms of terminals according to the present invention used to join a rail for rail (conductive base material) and a bond wire (conductive wire) through a molten metal. is doing.
FIG. 3A shows a terminal having a form different from the terminal shown in FIG. 1 in that a notch is provided in the direction in which the conducting wire is inserted. The terminal of this form is effective, for example, when it is necessary to wire the bond line below the bonding position of the terminal.
In FIG. 3 (b), one opening of the cylindrical housing is brought into close contact with the surface of the rail base material, the other opening is connected to the hole of the connecting portion and inserted into the housing, and the lead wire is connected to the rail. A terminal is shown that is guided in a substantially vertical direction with respect to the surface of the base material and is provided with a notch for introducing molten metal on the circumference of the cylinder. The terminal of this form is effective, for example, when the parallel rails are electrically connected to each other with a bond line, and a process of sealing the opening with the surface 8 of the crucible as shown in FIG. 1 is necessary. There is also an advantage of not.
FIG. 3 (c) shows a terminal having a configuration in which the accommodating portion is formed in a cylindrical shape with a bottom, the opening of the cylinder is in close contact with the surface of the rail base material, and a notch is provided on the circumference of the cylinder. ing. The terminal of this form has an advantage that the step of sealing the opening by the surface 8 of the crucible 10 as shown in FIG. 1 is not necessary.
In FIG. 3 (d), one opening of the cylindrical housing is in close contact with the surface of the rail base material, and the other opening is, for example, accommodates the runner outlet of the crucible as shown in FIG. The terminal has a structure in which the inside of the housing is sealed by being in close contact with the surface of the crucible, and the other opening also has a function as a molten metal supply port.
FIG. 3E is the same as the terminal in the form shown in FIG.
In addition, the crucible etc. which have various structures can be used for the apparatus for making molten metal flow in into the molten metal supply port provided in the terminal which concerns on Fig.3 (a) thru | or (e).

  4 (a) to 4 (e) are diagrams illustrating a state in which the joining process between the rail base material and the bond line in FIGS. 3 (a) to 3 (e) is completed.

  The present invention can also be applied to a structure bonded to a conductor by a method of bonding a conductor using the terminal and a conductive base material. For example, a ground wire is attached to a grounding copper plate, a gas pipe, a water pipe, or the like.

  As described above, the embodiment of the present invention has been described with reference to the examples. However, the present invention is not limited to the above-described examples, and the housing portion that accommodates the molten metal is integrated with the terminal, and the space between the two conductors. This includes the technical idea of electrically connecting the two, and can be appropriately added and modified within the scope of the gist of the present invention.

An embodiment for arranging a terminal according to the present invention in a crucible and performing electrical bonding between a base material (not shown) and a conducting wire 4 is shown. The welding figure of the terminal and welding metal by this invention which joined the base material (not shown) and conducting wire. The aspect figure before joining a bond line to a rail using the electric junction terminal of various forms by the present invention. The aspect figure after joining of FIG. The deformation | transformation aspect figure of the crucible used when joining with the electrical junction terminal which concerns on FIG.3 (d). The aspect figure which showed the Example which performs the conventional thermite welding. The aspect figure in which a part of crucible was damaged. It is the welding completion figure at the time of implementing the conventional thermite welding, Comprising: The aspect figure which showed the relationship between the welding area | region of a terminal and a welding part, and the fusion welding area | region of a base material surface and a welding part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electrical junction terminal 2 ... Accommodating part 3 ... Connection part 4 ... Conductor wire 5 ... Notch part 6 ... Hollow part 7 ... Welding part, welding metal 8 ... Surface 10.Crucible 10 '.. Thermite welding device 11..Combustion furnace 12..Runner 13..Cavity 14..Welding terminal 15..Recess 16..Opening 17..Surface 81..Fusion region 82 .. Welding area

Claims (10)

A terminal for joining a lead wire and a base material via a weld metal,
An accommodating portion for accommodating a welding material to be a deposited metal;
A connection for connecting the conductor;
A terminal configured to have.   The terminal according to claim 1, wherein the housing portion is formed in a cylindrical shape so as to cover the weld metal in the circumferential direction.   Of the two openings of the cylindrical housing, one opening is open to the surface of the base material, and the other opening is opened to supply the melt into the housing. The terminal according to claim 2.   One opening of the cylindrical storage part opens to the surface of the base material, and an opening for supplying the melt into the storage part is provided on the periphery of the storage part. The terminal according to claim 2.   The terminal according to claim 4, wherein the other opening of the cylindrical housing portion is closed to form a bottom portion.   The terminal according to any one of claims 1 to 5, wherein the connecting portion is capable of guiding the lead wire through the insertion hole.   The terminal according to claim 6, wherein the hole penetrates the bottom portion.   The terminal according to any one of claims 1 to 6, wherein the terminal is for thermite welding. A method of joining a lead wire and a base material via a weld metal using a terminal provided with a housing portion for housing a metal, and a connection portion for connecting to a lead wire,
Connecting the lead wire and the connecting portion;
Supplying molten metal into the container;
A joining method including:   A structure electrically connected to a conductor using a terminal provided with a connection portion to which a conductor is connected and a storage portion in which molten metal is stored.

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