JP2006331765A - Winding-terminal connection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding-terminal connection method for facilitating the connection work between a winding terminal and a connector of a terminal by omitting the work for peeling off an insulation coating layer of a winding. <P>SOLUTION: The terminals 3 of a plurality of the windings have the insulation coating layer, and brazing filler metal 4; and are windingly surrounded at the connector 6 of the terminal 5 and heated by flowing a current I into the connector 6. The insulation coating layer 1 is meltingly removed and the brazing filler metal 4 is melted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a winding terminal connection method, and more particularly to a winding terminal connection method used for a winding coil of a motor or the like.

Conventionally, in an electromagnetic device such as a motor and an electromagnetic electroacoustic device in which a winding coil is used, soldering is used for connection between the terminal of the winding and the connection portion of the terminal.
Since the winding has an insulating coating layer, it is necessary to remove the insulating coating layer of the winding at the terminal when soldering the terminal of the winding and the connecting portion of the terminal.
In recent years, a heat-resistant winding having an insulating coating layer that can withstand higher temperatures (for example, an insulating coating layer having a melting temperature of 250 ° C. to 350 ° C.) has been used. It has been difficult to remove the insulating coating layer of the winding by heating when melting the solder. For this reason, conventionally, before the work of connecting the terminal of the winding and the connection portion of the terminal, it is necessary to peel off the insulating coating layer of the winding. In order to peel off the insulating coating layer of this winding, a mechanical peeling method or other methods have been employed (for example, see Patent Document 1).

In Patent Document 1, the step of arranging the end of the winding on the terminal, the step of removing the insulating coating layer of the winding with the heating light of the laser beam to expose the core wire, and soldering the connection portion of the terminal and the terminal And a terminal connection method for windings including the step of:
JP-A-9-84192

As described above, in the conventional method for connecting terminals of windings, it is necessary to mechanically remove the insulating coating layer of the winding or to remove the insulating coating layer of the winding with the heating light of the laser beam. The connection work between the end of the winding and the connection portion of the terminal takes time and is complicated.
Accordingly, an object of the present invention is to provide a method for connecting a terminal of a winding that can omit the work of peeling off the insulating coating layer of the winding and can easily perform a connecting operation between the terminal of the winding and the connecting portion of the terminal. To do.

In order to achieve the above object, a winding terminal connecting method according to the present invention includes a plurality of winding ends having an insulating coating layer and brazing material surrounded by a winding at a terminal connecting portion. Then, an electric current is passed through the connecting portion and heated to melt and remove the insulating coating layer and to melt the brazing material.
Further, the terminals of the plurality of windings having the insulating coating layer are installed together with the brazing material at the terminal connection portion, and then the terminal and the brazing material are temporarily held by plastic working of the connection portion, Next, a pair of electrodes are brought close to each other, and while pressing the terminal and the brazing material so as to be wound and plastically deformed at the connecting portion, an electric current is passed through the connecting portion to heat the insulating member. The coating layer is melted and removed, and the brazing material is melted.

Also, a plurality of winding terminals having an insulating coating layer are installed together with a brazing material at a terminal connection portion, and then a pair of electrodes are brought close to each other to connect the terminal and the brazing material. While being pressed so as to be wound and plastically deformed at the portion, an electric current is passed through the connecting portion and heated to melt and remove the insulating coating layer and to melt the brazing material.
In addition, the connecting portion is placed on the left and right sides of the placement portion before the winding in the cross-sectional view, and on the placement portion on which the terminal and the brazing material are placed. And a pair of side wall portions disposed symmetrically on the side surface of the wire.

The present invention has the following remarkable effects.
The winding terminal connection method according to the present invention can omit the work of peeling off the insulating coating layer of the winding, and can easily perform the connection work between the terminal of the winding and the connection portion of the terminal. Further, the insulating coating layer of the heat-resistant winding can be easily melted and removed. Further, the work time can be shortened by omitting the work of stripping the insulating coating layer of the winding.
In addition, the electrical conductivity is improved as compared with the conventional soldering, and the mechanical strength can be increased.

Moreover, since a pair of electrodes are used to wind and plastically deform the terminal and the brazing material at the connecting portion and to heat the terminal and the brazing material at the connecting portion, the terminal and the connecting portion are connected. Can be simplified.
Further, the working time can be further shortened by omitting the step of temporarily holding the terminal and the brazing material by plastic working of the connecting portion.
Further, the current can flow evenly along the pair of side wall portions, and the terminal and the brazing material can be heated in a well-balanced manner as a whole.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
Referring to FIG. 1, a winding terminal connection method according to the first embodiment of the present invention includes, for example, terminals 3 of a plurality of windings 10 used as winding coils of an electromagnetic device such as a motor. Used to connect the connecting portion 6 of the terminal 5.
Specifically, in the winding terminal connection method according to the first embodiment, the terminals 3 and the brazing material 4 of the plurality of windings 10 having the insulating coating layer 1 are connected to the connection portion 6 of the terminal 5. Then, it is surrounded by a winding shape (in the direction of arrow B in FIG. 1), and the current I is supplied to the connecting portion 6 and heated (see FIG. 3) to melt and remove the insulating coating layer 1 and melt the brazing material 4. Is the method.
Each of the windings 10 is a heat-resistant winding 10 and is formed by coating a conductive core wire 2 with a resin insulating coating layer 1 having a melting temperature of, for example, 250 ° C. to 350 ° C.

As the brazing material 4, a material having a melting temperature of 600 ° C. to 1000 ° C. is used, for example, phosphor copper solder. The brazing material 4 is a plate-like material.
The terminal 5 is made of brass. In addition, the connection portion 6 is provided with a placement portion 8 on which the terminal 3 and the brazing material 4 are placed, and on the left and right sides (upright) of the placement portion 8 before winding in a cross-sectional view, and the terminal 3 and a pair of side wall portions 9, 9 which are wound around the side surfaces of the brazing material 4 and have the same shape. That is, the pair of side wall portions 9 and 9 are disposed symmetrically. The side wall parts 9 and 9 are flat form.
As shown in FIG. 2, during the connection work, the terminal 5 is placed on the lower electrode 7b with the connecting portion 6 positioned between the pair of upper and lower electrodes 7a and 7b. The electrodes 7a and 7b are configured to be close to and away from each other (in the direction of arrow C in FIG. 2). The electrodes 7a and 7b are made of a metal having a large electric resistance. The electrodes 7a and 7b are connected to a power supply (not shown) in order to cause the current I to flow through the connecting portion 6 and raise the temperature of the connecting portion 6. The tip surface of the lower electrode 7b is planar, but a vertically split semi-elliptical concave 11 is formed on the tip surface of the upper electrode 7a.

Next, details of the winding terminal connection method according to the first embodiment of the present invention will be described in order based on FIGS.
First, as shown in FIG. 1, the terminals 3 of the plurality of windings 10 having the insulating coating layer 1 are installed together with the brazing material 4 on the connection portion 6 of the terminal 5 (in the direction of arrow A in FIG. 1). More specifically, the terminals 3 of the plurality of windings 10 are placed side by side on the placement portion 8 of the connection portion 6, and the plate-like brazing material 4 is placed on the terminals 3. In addition, the size of the terminal 3 and the brazing material 4 installed on the mounting portion 8 is just large enough to fit between the pair of side wall portions 9 and 9 (a size that does not cause large rattling on the left and right). Is set.
Next, the pair of side wall portions 9 and 9 of the connecting portion 6 are bent inward (arrow B side in FIG. 1) with a caulking tool (not shown). The terminal 3 and the brazing material 4 are temporarily held by the plastic working of the connecting portion 6.

In this manner, with the terminal 3 and the brazing material 4 temporarily held at the connection portion 6, the terminal 5 is placed on the lower electrode 7b as shown in FIG. At this time, the connecting portion 6 is positioned at a predetermined location between the pair of upper and lower electrodes 7a and 7b.
Next, as shown in FIG. 3, the pair of electrodes 7a and 7b are brought close to each other and pressed so that the terminal 3 and the brazing material 4 are wound and plastically deformed at the connecting portion 6 (arrow F in FIG. 3). Direction), a current I (in the direction of arrow I in FIG. 3) is passed through the connecting portion 6 and heated to melt and remove the insulating coating layers 1 and melt the brazing material 4.
At this time, the current I flows evenly along the pair of side wall portions 9 and 9. Thereby, the temperature of the side wall parts 9 and 9 rises with a good balance as a whole. Moreover, since the side wall parts 9 and 9 are wound around the side surfaces of the terminal 3 and the brazing material 4, the terminal 3 and the brazing material 4 are heated with a good balance as a whole. This heating is performed at the melting temperature (600 ° C. to 1000 ° C.) of the brazing material 4, and the insulating coating layer 1 (melting temperature 250 ° C. to 350 ° C.) of the windings 10 at the terminal 3 is almost completely melted. Removed. Further, the brazing material 4 in a molten state spreads uniformly by this heating, and closes the space between the terminal 3 and the side wall portions 9 and 9 and the mounting portion 8 surrounded by the terminal 3.
Thus, the connection work between the terminal 3 of the windings 10 and the connection portion 6 of the terminal 5 is completed, and the state shown in FIG. 4 is obtained.

FIG. 5 to FIG. 8 are diagrams for explaining a winding terminal connection method according to the second embodiment of the present invention. Unlike the first embodiment, the second embodiment exemplifies a case where the work of temporarily holding the terminal 3 and the brazing material 4 is omitted. Moreover, in 2nd Embodiment, the shape of the connection part 6 of the terminal 5 differs compared with 1st Embodiment. Specifically, each side wall 9 has a shape slightly inclined inward from the beginning. Further, a rounded portion 9 a is formed on the outer side of the distal end portion of each side wall portion 9. Other shapes of the terminal 5 (such as the placement portion 8) are the same as those in the first embodiment.
Moreover, the shape of the terminal 3 of the brazing material 4 and the windings 10 installed on the mounting portion 8 of the connection portion 6 is the same as that of the first embodiment. The structure of the pair of upper and lower electrodes 7a and 7b is the same as that of the first embodiment.

Next, based on FIGS. 5-8, the detail of the terminal connection method of the coil | winding which concerns on 2nd Embodiment of this invention is demonstrated later on.
First, as shown in FIG. 5, the terminals 3 of the plurality of windings 10 having the insulating coating layer 1 are installed together with the brazing material 4 on the connection portion 6 of the terminal 5 (in the direction of arrow D in FIG. 5). More specifically, the terminal 3 is placed on the placement portion 8 of the connection portion 6, and the plate-like brazing material 4 is placed on the terminal 3. In addition, the size of the terminal 3 and the brazing material 4 installed on the mounting portion 8 is just large enough to fit between the pair of side wall portions 9 and 9 (a size that does not cause large rattling on the left and right). Is set.

Next, as illustrated in FIG. 6, the terminal 5 is placed on the lower electrode 7 b in a state where the terminal 3 and the brazing material 4 are installed in the connection portion 6. At this time, the connecting portion 6 is positioned at a predetermined location between the pair of upper and lower electrodes 7a and 7b.
Next, as shown in FIGS. 6 and 7, the pair of electrodes 7 a and 7 b are brought close to each other (in the direction of arrow G in FIG. 6), and the terminal 3 and the brazing material 4 are wound around the connecting portion 6. While pressing so as to deform (in the direction of arrow F in FIG. 7), current I (in the direction of arrow I in FIG. 7) is passed through the connecting portion 6 and heated to melt and remove the insulating coating layer 1 and melt the brazing material 4 To do.
More specifically, the pair of electrodes 7a and 7b are brought close to each other so that the tip end portions of the side wall portions 9 and 9 of the connecting portion 6 enter the recessed portion 11 of the upper electrode 7a. And after the front-end | tip part of the side wall parts 9 and 9 contacted the wall surface which forms the hollow part 11, the electrode 7a and 7b are made to approach mutually, and the side wall parts 9 and 9 are made inside (arrow E of FIG. 6). Bend to the side). At this time, each side wall 9 is smoothly bent by the rounded portion 9a provided outside the tip. That is, in the second embodiment, the temporary holding operation (folding the side walls 9 and 9 with a caulking tool) of the first embodiment is omitted.

Further, when the terminal 3 and the brazing material 4 are pressed so as to be wound and plastically deformed at the connection portion 6, the current I flows along the pair of side wall portions 9 and 9 evenly. Thereby, the temperature of the side wall parts 9 and 9 rises with a good balance as a whole. Moreover, since the side wall parts 9 and 9 are wound around the side surfaces of the terminal 3 and the brazing material 4, the terminal 3 and the brazing material 4 are heated with a good balance as a whole. Since this heating is performed at the melting temperature of the brazing material 4 (600 ° C. to 1000 ° C.), the insulating coating layer 1 of the windings 10 at the terminal 3 (melting temperature 250 ° C. to 350 ° C.) is almost completely Melted and removed. Further, the brazing material 4 in a molten state spreads uniformly by this heating, and closes the space between the terminal 3 and the side wall portions 9 and 9 and the mounting portion 8 surrounded by the terminal 3.
Thus, the connection work between the terminal 3 of the windings 10 and the connection portion 6 of the terminal 5 is completed, and the state shown in FIG. 8 is obtained.

The present invention is not limited to the above-described embodiment, and the design can be changed without departing from the gist of the present invention. For example, in the present embodiment, the case where the brazing material 4 has a plate shape is illustrated, but the present invention is not limited to this, and the brazing material 4 may have a rod shape. Further, the number of brazing members 4 installed in the connection portion 6 of the terminal 5 together with the terminals 3 of the windings 10 may be plural.
Further, the brazing material 4 is not limited to phosphor copper brazing, and other types of brazing materials may be used. For example, silver wax may be used.

As described above, the terminal connection method of the winding according to the present invention is such that the terminal 3 and the brazing material 4 of the plurality of windings 10 having the insulating coating layer 1 are wound at the connection portion 6 of the terminal 5. , The current I is passed through the connection portion 6 and heated to melt and remove the insulating coating layers 1 and melt the brazing material 4, so that the insulating coating layers 1 of the windings 10 are melted by heating. Removal and melting of the brazing material 4 can be performed continuously. Thereby, the peeling operation | work of insulation coating layer 1 ... can be abbreviate | omitted, and the connection operation | work with the terminal 3 and the connection part 6 can be performed easily. Further, since the brazing material 4 having a melting temperature higher than that of the solder (for example, 600 ° C. to 1000 ° C.) is heated and melted, the heat-resistant winding 10 (the melting temperature of the insulating coating layer 1 is, for example, 250 ° C. to 350 ° C.) The insulating coating layer 1 can be easily melted and removed. Further, the work time can be shortened by omitting the peeling work of the insulating coating layers 1 of the windings 10.
In addition, since the current I can be supplied to the connection portion 6 to uniformly increase the temperature of the connection portion 6 as a whole, the brazing material 4 spreads more uniformly compared to the soldering solder, so that the terminal 3 and the connection portion 6 are spread. Can be connected. As a result, the electrical conductivity becomes better and the mechanical strength can be increased as compared with the case of conventional soldering.

Further, the terminals 3 of the plurality of windings 10 having the insulating coating layer 1 are installed together with the brazing material 4 at the connection portion 6 of the terminal 5, and then the terminals 3 and the brazing material 4 are plasticized at the connection portion 6. The connecting portion 6 is temporarily held by processing, and then the pair of electrodes 7a and 7b are brought close to each other and pressed so that the terminal 3 and the brazing material 4 are wound and plastically deformed by the connecting portion 6. The current I is passed through and heated to melt and remove the insulating coating layer 1... And melt the brazing material 4. Therefore, the heating removes the insulating coating layer 1 of the windings 10 and melts the brazing material 4. Can be performed continuously. Thereby, the peeling operation | work of insulation coating layer 1 ... can be abbreviate | omitted, and the connection operation | work with the terminal 3 and the connection part 6 can be performed easily. Further, the work time can be shortened by omitting the peeling work of the insulating coating layers 1 of the windings 10.
Furthermore, since the terminal 3 and the brazing material 4 are wound and plastically deformed at the connecting portion 6 and the terminal 3 and the brazing material 4 are heated at the connecting portion 6, a pair of electrodes 7a and 7b are used. The apparatus for connecting the terminal 3 and the connection unit 6 can be simplified.

Further, the terminals 3 of the plurality of windings 10 having the insulating coating layer 1 are installed together with the brazing material 4 at the connection portion 6 of the terminal 5, and then the pair of electrodes 7a and 7b are brought close to each other, While pressing the terminal 3 and the brazing material 4 at the connecting portion 6 so as to be wound and plastically deformed, the current I is supplied to the connecting portion 6 and heated to melt and remove the insulating coating layer 1. Since it melts, the removal of the insulating coating layer 1 of the windings 10 and the melting of the brazing material 4 can be performed continuously by heating. Thereby, the peeling operation | work of insulation coating layer 1 ... can be abbreviate | omitted, and the connection operation | work with the terminal 3 and the connection part 6 can be performed easily. Further, the work time can be shortened by omitting the peeling work of the insulating coating layers 1 of the windings 10.
Furthermore, since the terminal 3 and the brazing material 4 are wound and plastically deformed at the connecting portion 6 and the terminal 3 and the brazing material 4 are heated at the connecting portion 6, a pair of electrodes 7a and 7b are used. The apparatus used for the connection work between the terminal 3 and the connection unit 6 can be simplified. Further, the work time can be further shortened by omitting the work of temporarily holding the terminal 3 and the brazing material 4 by the plastic working of the connecting portion 6.

  Further, the connecting portion 6 of the terminal 5 is erected on both the left and right sides of the mounting portion 8 before winding and the mounting portion 8 on which the terminal 3 of the windings 10 and the brazing material 4 are mounted. And a pair of side wall portions 9 and 9 disposed symmetrically on the side surfaces of the terminal 3 and the brazing material 4, so that the current I flows along the pair of side wall portions 9 and 9. And can flow evenly. Thereby, the temperature of the side wall parts 9 and 9 can be raised with a good overall balance, and the terminal 3 and the brazing material 4 can be heated with a good overall balance.

In the winding terminal connection method according to the first embodiment of the present invention, it is a cross-sectional side view showing a state where the terminal of the winding is installed together with the brazing material at the terminal connection. It is a cross-sectional side view which shows the state which mounted the terminal of the temporary holding state in the lower electrode. It is a cross-sectional side view which shows the press state by an electrode. It is a cross-sectional side view which shows the state after completion | finish of a connection operation | work. In the terminal connection method of the winding concerning a 2nd embodiment of the present invention, it is a section side view showing the state where the terminal of winding was installed in the terminal connection part with the brazing material. It is a cross-sectional side view which shows the state which mounted the terminal in the lower electrode. It is a cross-sectional side view which shows the press state by an electrode. It is a cross-sectional side view which shows the state after completion | finish of a connection operation | work.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulation film layer 3 Terminal 4 Brazing material 5 Terminal 6 Connection part 7a, 7b Electrode 8 Mounting part 9 Side wall part
10 Winding I Current

Claims (4)

  The terminal (3) and the brazing material (4) of the plurality of windings (10) having the insulating coating layer (1) are surrounded in a winding shape by the connection portion (6) of the terminal (5), A method for connecting a terminal of a winding, characterized in that a current (I) is passed through the connecting portion (6) and heated to melt and remove the insulating coating layer (1) and to melt the brazing material (4).   A terminal (3) of a plurality of windings (10) having an insulating coating layer (1) is installed together with a brazing material (4) on a connection part (6) of a terminal (5), and then the terminal (3) ) And the brazing material (4) are temporarily held by plastic working of the connecting portion (6), and then the pair of electrodes (7a) and (7b) are brought close to each other so that the terminal (3) and While pressing the brazing material (4) so as to be wound and plastically deformed at the connection portion (6), current (I) is passed through the connection portion (6) and heated, and the insulating coating layer (1 ) Is melted and removed, and the brazing material (4) is melted.   A terminal (3) of a plurality of windings (10) having an insulating coating layer (1) is installed together with a brazing material (4) at a connection part (6) of a terminal (5), and then a pair of electrodes ( 7a) and 7b are brought close to each other, and the terminal (3) and the brazing material (4) are pressed by the connecting portion (6) so as to be wound and plastically deformed, while the connecting portion (6 ) Is applied with current (I) and heated to melt and remove the insulating coating layer (1) and to melt the brazing material (4).   The connection portion (6) includes a placement portion (8) on which the terminal (3) and the brazing material (4) are placed, and the left and right sides of the placement portion (8) before the winding in a cross-sectional view. A pair of side wall portions (9) and (9) which are provided on both sides and are symmetrically arranged on the side surfaces of the terminal (3) and the brazing material (4). The terminal connection method of the coil | winding of Claim 1, 2 or 3.

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