JP2013176198A - Connection method for lead wire and welding device for lead wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely connect a connection terminal and a lead wire to each other.SOLUTION: A method for connecting a lead wire 14 includes: holding the lead wire 14 inside a bent portion 18c between a terminal base end 18a and a terminal tip 18b; applying electric power to between both ends of the bent portion 18c while pressing the bent portion 18c holding the lead wire 14 toward the inside in a terminal bending direction; and applying electric power to between the terminal base end 18a and terminal tip 18b while relatively pressing the terminal base end 18a and terminal tip 18b toward the inside in the terminal bending direction.

Description

  The present invention relates to a method for connecting lead wires incorporated in an electric motor or the like and a lead wire welding apparatus.

  Conventionally, for example, connecting a lead wire to a connection terminal, such as connecting a commutator riser and a rotor winding in an electric motor, leads the lead after bending one end of the connection terminal into a J-shape. The wire is engaged with one end of the connection terminal, and in this state, the connection terminal and the lead wire are fusing (heat caulking).

  During fusing, as shown in FIG. 6, a J-shaped connection terminal 201 engaged with one end of the lead wire 200 is sandwiched between a pair of electrodes 202 and 203. Then, the connection terminal 201 and one end of the lead wire 200 are crimped and temporarily fixed by the pair of electrodes 202 and 203, and a first current path of one electrode 202-connection terminal 201-the other electrode 203 is formed. It is formed. In this state, a current is supplied to the connection terminal 201 through the pair of electrodes 202 and 203 (first current supply). Then, the connection terminal 201 generates heat and heats one end of the lead wire 200. Then, the coating resin (insulator) 204 covering the lead wire 200 is vaporized and diffused at one end of the lead wire 200, or the coating resin 204 is softened and pushed out from one end of the pressurized lead wire 200. It is. As a result, the lead body 200 (copper wire or the like) 205 at one end of the lead wire 200 and the connection terminal 201 are in direct contact with each other in a pressure-bonded state, whereby one electrode 202 -the connection terminal 201 -one end of the lead wire 200 -connection. A second current path of the terminal 201 and the other electrode 203 is formed. Since the allowable current amount between the pair of electrodes 202 and 203 is increased by forming the second current path in addition to the first current path, it is determined that this state has been reached. By causing a larger current to flow between 202 and 203 (second current supply), the connection terminal 201 and one end of the lead wire 200 are welded.

JP 2010-206998 A

  However, the above-described conventional example has the following problems. When the J-shaped connection terminal 201 is sandwiched between the pair of electrodes 202 and 203 and the connection terminal 201 and the lead wire 200 are temporarily fixed, the lead wire 200 is reliably positioned inside the bent portion 201a of the connection terminal 201. The temporary fixing position of the lead wire 200 varies. Therefore, the position of the lead wire 200 at the time of welding the lead wire 200 (at the time of supplying the second current) varies for each welding. Then, the amount of energy transmitted to one end of the lead wire 200 by the second current supply fluctuates for each welding, resulting in variations in welding, and the bonding strength is not stable.

  Furthermore, in the conventional method, although the connection terminal 201 and the lead wire 200 are temporarily fixed by clamping, the gap α generated between the connection terminal 201 and the lead wire 200 cannot be completely eliminated. When the above welding is performed in a state where such a gap remains, a resin-modified product 204a such as a molten coating resin or a vaporized substance (mainly carbide) of the coating resin generated when the coating resin is removed from one end of the lead wire is converted into the gap. It enters and remains. These modified resins 204a adversely affect the electrical characteristics at the connection site between the lead wire 200 and the connection terminal 201, and also deteriorate the durability of the connection site.

  In the connection of the lead wire 200 incorporated in a device installed in an installation place with less vibration, there is not much trouble even with the conventional method described above. However, in a device installed in a place where vibration is intense, such as an in-vehicle device (such as a drive motor), higher connection strength and durability are required for the connection portion of the lead wire 200. The lead wire connection method cannot satisfy the connection strength and durability required for such a device.

  In order to prevent such welding variation and increase the bonding strength, it is also conceivable to increase the force with which the connection terminal 201 is sandwiched between the pair of electrodes 202 and 203. However, if it does so, one end of the lead wire 200 will be crushed and deform | transformed by the sandwiching of the electrodes 202 and 203. Since deformation of the lead wire 200 adversely affects electrical characteristics and durability at the connection portion between the lead wire 200 and the connection terminal 201, such a solution (increased clamping force) cannot be executed.

  Therefore, the main object of the present invention is to make it possible to reliably connect the connection terminal and the lead wire.

  Therefore, the present invention provides a lead wire connecting method in which a bent portion is provided between a terminal base end and one end of the terminal and a lead wire is sandwiched and connected to the bent portion of the connecting terminal formed into a J-shape. Take the configuration.

That is, the lead wire connecting method of the present invention is:
A first step of sandwiching the lead wire inside the bent portion;
A second step of energizing between both ends of the bent portion while relatively pressing both ends of the bent portion sandwiching the lead wire toward the inside of the terminal bending direction;
The terminal base end and the terminal front end while relatively pressurizing the terminal base end and the terminal front end toward the inside in the terminal bending direction while performing the pressurization energization process in the second step or after the execution. A third step of energizing during
including.

Furthermore, in the lead wire connecting method of the present invention,
In the second step, the first electrode is disposed at the terminal proximal end of the bent portion, and the second electrode is disposed at the terminal distal end of the bent portion, and then the first, Energizing between the first and second electrodes while relatively pressing the bent portion toward the inside of the terminal bending direction with the two electrodes,
In the third step, a third electrode is disposed at the terminal proximal end and a fourth electrode is disposed at the terminal distal end, and then the terminal proximal end and the terminal distal end are disposed by the third and fourth electrodes. And energizing between the third and fourth electrodes while relatively pressing toward the inside of the terminal bending direction,
Is preferred.

The lead wire welding apparatus of the present invention has the following configuration. That is,
A welding apparatus for a lead wire, wherein a bending portion is provided between a terminal proximal end and a terminal distal end, and a lead wire is sandwiched and welded to the bending portion of the connection terminal bent into a J shape,
A first electrode in contact with the outer side of the terminal proximal end of the bent portion;
A second electrode in contact with the outer side of the terminal tip side end of the bent portion;
A third electrode that contacts the outside of the terminal base end;
A fourth electrode that contacts the outside of the terminal tip;
A first pressurization energization is applied to the bent portion through the first and second electrodes while the first and second electrodes relatively pressurize the bent portion toward the inside of the terminal bending direction. And
The terminal proximal end and the terminal distal end are relatively applied to the inner side in the terminal bending direction with the third and fourth electrodes while or after the pressurization energization process by the first pressurization energization unit. A second pressurizing energization section that energizes the terminal base end and the terminal tip end through the third and fourth electrodes while pressing,
Is provided.

The present invention described above preferably has the following configuration. That is, in the lead wire connecting method of the present invention,
The lead wire is covered with an insulating resin layer,
In the second step, by heating, the bent portion is heated to heat and soften the insulating resin layer, and then the heat softened state of the insulating resin layer is pushed out from the bent portion by pressurization.
In the third step, the gap between the bent portion and the lead wire is eliminated as much as possible by pressurization, and the terminal base end and the terminal tip are welded by energization. .

In the lead wire welding apparatus of the present invention,
The lead wire is covered with an insulating resin layer,
The first pressure energization unit heats and softens the insulating resin layer by applying heat to the bent portion, and then pressurizes the insulating resin layer in the heat-softened state from the bent portion by pressurization. ,
The second pressurizing energization unit eliminates the gap between the bent portion and the lead wire as much as possible by pressurization, and then energizes the terminal proximal end and the terminal distal end. Weld.

  According to the method and apparatus of the present invention, the insulating resin layer of the lead wire is heated and softened and pushed out of the bent portion, and in this state, the gap between the bent portion and the lead wire disappears. The end and the terminal tip are welded. Therefore, the terminal proximal end and the terminal distal end are firmly welded in a state where the lead wire body and the bent portion are in close contact with each other.

  In order to obtain the above effects, the present invention more preferably includes the following configuration. That is, the pressurization energization process is performed in a state where the first electrode and the third electrode are integrated, or in a state where the second electrode and the fourth electrode are integrated. According to this configuration, the number of electrodes can be reduced.

  In the lead wire welding apparatus of the present invention, it is preferable that the first pressurization energization unit and the second pressurization energization unit share an energization unit, and then the configuration of the energization unit is configured. It becomes possible to simplify.

  The lead wire connection method of the present invention preferably further comprises the following configuration. That is, in the third step, at least the pressurization process of the pressurization process and the energization process is performed simultaneously with the second step. According to this configuration, the second step can be performed in a state where the winding is pushed into the bent portion by the pressurizing process in the third step, and the positioning of the winding is further ensured.

  The lead wire welding apparatus of the present invention preferably further comprises the following configuration. That is, the second pressurization energization unit performs at least the pressurization process of the pressurization process and the energization process simultaneously with the pressurization energization process of the first pressurization energization part. According to this configuration, it is possible to perform the processing of the first heating energization unit in a state where the winding is pushed into the inside of the bent portion by the pressurizing process by the second heating energization unit, and the positioning of the winding Is even more certain.

  According to the present invention, the connection terminal and the lead wire can be reliably connected.

It is sectional drawing which shows the structure of the DC motor which is an example of the apparatus which can implement the lead wire welding apparatus and lead wire connection method of this invention. It is a principal part enlarged plan view which shows the connection structure of the riser and winding | winding of a DC motor which are the implementation object of the lead wire welding apparatus and lead wire connection method of this invention. It is a figure which shows the structure of the lead wire welding apparatus of one Embodiment of this invention. It is a principal part enlarged view which shows the state in the middle of the process of the lead wire connection method using the lead wire welding apparatus of one Embodiment. It is a figure which shows the structure of the lead wire welding apparatus of the modification of the lead wire welding apparatus of this invention. It is a principal part enlarged view which shows the conventional method.

  First, referring to FIG. 1 and FIG. 2, the structure of a DC motor (electric motor) 1 for connecting a winding as a lead wire to a commutator as a connection terminal by the lead wire welding apparatus and the lead wire connection method of the present invention will be described. To explain. The DC motor 1 includes a case 2, a permanent magnet 3 fixed in the case 2, an annular cap 6 that closes the opening of the case 2, and a rotor 9 that is rotatably mounted in the case 2. A commutator 4 that is one of connection terminals provided at one end of the rotor 9 and a brush 5 that is in sliding contact with the commutator 4 are provided.

  The permanent magnet 3 is fixed to the case 2 such that the magnetic poles on the inner peripheral side alternately appear with N poles and S poles in the circumferential direction of the case 2. The rotor 9 includes a shaft 12, a rotor core 13 fixed to the outer periphery of the shaft 12, and a winding 14 wound around a slot of the rotor core 13. A winding 14 that is one of the lead wires is connected to the commutator 4. As shown in FIG. 2A, the winding 14 includes a winding main body 14a made of a copper wire and an insulating resin layer 14b made of a thermoplastic insulating resin such as polyamideimide that covers the winding main body 14a. . The brush 5 is in sliding contact with the outer periphery of the commutator 4 and is connected to an external power source (not shown), and supplies current to the winding 14 via the commutator 4 in contact therewith.

  The commutator 4 is disposed on the outer periphery of a cylindrical insulating layer 16 formed of phenol resin or the like that is fitted and fixed to the outer periphery of the shaft 12. The commutator 4 is made of copper, and includes a conduction bar 17 that is disposed to face the brush 5 and is in sliding contact with the brush 5, and a riser 18 that extends from one end of the conduction bar 17. The riser 18 is a connection terminal of the commutator 15, and the winding 14 is connected to the riser 18 by welding. Specifically, as shown in FIGS. 2A and 2B, the riser 18 is bent and formed into a J shape by providing a bent portion 18c between the terminal proximal end 18a and the terminal distal end 18b. One end of the winding 14 is welded to the riser 18 while being sandwiched inside the bent portion 18c.

Next, the welding apparatus 1 of the present invention for welding the winding 14 described above to the riser 18 will be described with reference to FIG. The welding apparatus 100 includes an electrode unit 101, a first pressurizing energization unit 102A, and a second pressurization energizing unit 102B. The electrode portion 101 includes a terminal proximal end electrode 101a, a first terminal distal end side electrode 101b, and a second terminal distal end side electrode 101c. The first terminal tip side electrode 101b and the second terminal tip side electrode 101c are arranged in parallel. Further, the first and second terminal tip side electrodes 101b and 101c and the terminal base end side electrode 101a are arranged to face each other with a predetermined gap. The distal end surface 101b ₁ of the first terminal distal end side electrode 101b is a flat surface, and the size (length dimension W1 and width not shown) of the distal end surface 101b ₁ is the terminal distal end side end of the bent portion 18c of the riser 18. It has a size to cover the parts 18c _1. The distal end surface 101c ₁ of the second terminal distal end side electrode 101c is a flat surface, and the size (length dimension W2 and width not shown) of the distal end surface 101c ₁ is large enough to cover the terminal distal end 18b of the riser 18. ing. The distal end surface 101a of the terminal base-end-side electrode 101a ₁ is a flat surface, the size of the distal end surface 101a ₁ (length W3 and not shown width) and the terminal base end side end portion 18c ₂ of the bent portion 18c The size is such that it covers the terminal base end 18 a of the riser 18.

  The first pressurizing energization unit 102A includes a first pressurization unit 103A and a first energization unit 104A. The second pressurization energization unit 102B includes a second pressurization unit 103B and a second energization unit 104B. 103 A of 1st pressurization parts press the 1st terminal front end side electrode 101b toward the terminal base end side electrode 101a. The second pressurizing unit 103B presses the second terminal distal end side electrode 101c toward the terminal proximal end side electrode 101a. 103 A of 1st pressurization parts and the 2nd pressurization part 103B press the 1st terminal front end side electrode 101b and the 2nd terminal front end side electrode 101c separately, Comprising: It consists of a drive body such as a controllable air cylinder.

  104 A of 1st electricity supply parts supply a 1st constant current between the 1st terminal front end side electrode 101b and the terminal base end side electrode 101a. The first energization section 104A is generated by the first transformer 105A that supplies a first constant current between the first terminal distal end side electrode 101b and the terminal proximal end electrode 101a, and the first transformer 105A. And a first energization controller 106A that adjusts the first constant current to a predetermined value. The second energization unit 104B supplies a second constant current between the second terminal distal end side electrode 101b and the terminal proximal end electrode 101a. The second energization unit 104B is generated by the second transformer 105B that supplies a second constant current between the second terminal distal end side electrode 101b and the terminal proximal end electrode 101a, and the second transformer 105B. A second energization controller 106B that adjusts the second constant current to a predetermined value.

  Hereinafter, a welding operation between the winding 14 and the riser 18 using the welding apparatus 100 will be described with reference to FIGS. 3 and 4.

(First Step): Processing for Clamping Winding 14 by Bending Part 18c First, after removing the commutator 4 from the DC motor 1, the removed commutator 4 is connected to the terminal proximal side as shown in FIG. It is placed between the electrode 101a and the first and second terminal tip side electrodes 101b and 101c. The commutator 4 is arranged in the following direction. That is, the terminal base end 18a of the riser 18 faces the terminal base end side electrode 101a, The commutator 4 is arranged so that the terminal tip side end 18c ₁ of the bent portion 18c faces the first terminal tip side electrode 101b and the terminal tip 18b faces the second terminal tip side electrode 101c. In this way, one end of the winding 14 is sandwiched inside the bent portion 18c of the riser 18 of the commutator 4 placed between the first and second terminal tip electrodes 101b and 101c. Note that the riser 18 may be placed between the first and second terminal tip side electrodes 101b and 101c after one end of the winding 14 is sandwiched inside the bent portion 18c.

(Second Step): First Pressurization Energization Process Next, as shown in FIG. 4A, the first pressurizing portion 103A causes the first terminal distal end side electrode 101b to be connected to the terminal proximal end side electrode 101a. The first constant current is supplied to the bent portion 18c via the first terminal distal end side electrode 101b and the terminal proximal end side electrode 101a by the first energizing portion 104A while being relatively pressurized toward. At this time, the first energizing section 104A generates a current that causes the insulating resin layer 14b to be softened or melted by heating the winding 14 that is sandwiched by the bending section 18c by heating the bending section 18c. 1 is supplied to the bent portion 18c as a constant current. Furthermore, although the first pressurizing part 103A does not cause compressive deformation due to pressurization in the winding body 14a, the first terminal distal end side electrode 101b is applied to the bent part 18c with a force that causes further bending deformation. Pressure is applied toward the terminal proximal end electrode 101a. Thereby, the bent portion 18c generates heat, and the insulating resin layer 14b made of the thermoplastic insulating resin is heated and softened or melted. Further, the bent portion 18c is further bent in a state where the winding 14 is sandwiched. Accordingly, in the winding 14 at the bent portion contact portion, the insulating resin layer 14b protrudes to the outside of the bent portion 18c, and the winding main body 14a comes into direct contact with the inner surface of the bent portion 18c. Thereby, the coil | winding main body 14a and the riser 18 are electrically connected firmly.

(Third Step): Second Pressurization Energization Process While continuing the first pressurization energization process described above, a second pressurization energization process described below is further performed. That is, as shown in FIG. 4B, the second pressurizing portion 103B relatively pressurizes the second terminal distal end side electrode 101c against the terminal proximal end side electrode 101a. Further, a second constant current is supplied to the terminal proximal end 18a and the terminal distal end 18b via the second terminal distal end side electrode 101c and the terminal proximal end side electrode 101a by the second energization unit 104B.

  In the above description, it is described that the second pressurization energization process is performed while continuing the first pressurization energization process. However, during the best mode process, the first pressurization energization process and the second pressurization energization process are performed. Simultaneously with the energization process. By doing so, it is possible to perform the first pressurization energization process in a state where the winding 14 is pushed into the inside of the bent portion 18c by the pressurization process by the second pressurization energization process. Positioning is further ensured. In addition, in order to obtain the effect of pushing the winding 14 into the inner part of the bent portion 18c, only the pressurization process of the second pressurization energization process may be performed in the first pressurization energization process.

  On the other hand, the first pressurization energization process may be stopped during the second pressurization energization process, and the pressurization process or energization in the first pressurization energization process may be stopped during the second pressurization energization process. Only the processing may be continued, and the second pressurization energization processing can be performed even in such a state.

When performing the second pressurization energization process, the second pressurizing part 103B is configured so that the terminal distal end 18b is deformed toward the inside of the bent part and is in contact with the terminal proximal end 18a. The terminal tip side electrode 101c is pressurized toward the terminal base end side electrode 101a. Further, the second energization section 104B applies a second constant current (second constant current ≧ first constant current) to the second terminal distal end side to such an extent that the terminal distal end 18b and the terminal proximal end 18a are welded by energization. It supplies between the electrode 101c and the terminal base end side electrode 101a. As a result, the terminal distal end 18b and the terminal distal end 18c ₁ of the bent portion 18c are deformed and firmly contact the terminal proximal end 18a. At this time, the terminal distal end 18c ₁ of the bent terminal tip 18b and the bent portion 18c is bent and deformed along the winding body 14a also contact with the winding body 14a. Therefore, the gap α formed between the terminal tip 18b, the terminal base end 18a, and the winding body 14a is a terminal tip side end of the terminal tip 18b and the bent portion 18c that are curved and deformed along the winding body 14a. It is blocked by 18c ₁ and disappears as much as possible. Therefore, the softened or molten insulating resin layer 14b remaining in the gap α is pushed out of the gap α, and the terminal tip 18b, the terminal base end 18a, and the winding body 14a come into close contact with each other. .

  In this state, the second current-carrying part 104B supplies the second constant current between the second terminal distal end side electrode 101c and the terminal proximal end electrode 101a, and therefore the terminal distal end 18b and the terminal proximal end 18a. Is tightly welded in close contact with the winding body 14a with the gap α eliminated as much as possible.

  In the welding apparatus 100 described above, the first energization unit 104A and the second energization unit 104B are individually provided in order to supply different constant currents (first constant current and second constant current). However, as shown in FIG. 5, the first energization unit 104A and the second energization unit 104B may be combined into one energization unit 104 (transformer 105, energization controller 106). If it does so, the number of parts can be reduced and cost reduction can be aimed at. In this case, a current path switching circuit 108 is provided in the current supply path 107 to switch between the first constant current supply and the second constant current supply. Then, although the first constant current and the second constant current having different current values cannot be supplied at the same time, constant currents having different current values (first currents) are supplied to the welded portion between the riser 18 and the winding 14. 1 constant current, second constant current) can be supplied from a single energization unit 104.

  Further, in the configuration in which the energization unit is integrated (the energization unit 104), the first constant current and the second constant current are set to the same value, and then the first and second values having the same value are supplied from the energization unit 104. Two constant currents may be simultaneously supplied to the connection site between the winding 14 and the riser. Then, although the current value strictly suitable for the first and second pressurizing and energizing processes cannot be set, the winding 14 is connected to the inside of the bent portion 18c by the pressurizing process by the second pressurizing and energizing process. The first pressurizing and energizing process can be performed in a state where the coil 14 is pushed into the back, and the positioning of the winding 14 is ensured. Furthermore, the current switching circuit 108 can be omitted.

  In the above-described embodiment, the terminal proximal end electrode 101a constitutes the first and third electrodes, the first terminal distal end side electrode 101b constitutes the second electrode, and the second terminal distal end side. A fourth electrode is formed from the electrode 101c. However, it is needless to say that the first and third electrodes may be provided separately by dividing the terminal proximal end electrode 101a into two.

DESCRIPTION OF SYMBOLS 1 DC motor 2 Case 3 Permanent magnet 4 Commutator 5 Brush 6 Cap 9 Rotor 12 Shaft 13 Rotor core 14 Winding 14a Winding body 14b Insulating resin layer 15 Commutator 16 Insulating layer 17 Conduction bar 18 Riser 18a Terminal base 18b Terminal tip 18c Bend portion 18c ₁ terminal distal end portion 18c ₂ terminal proximal end portion 100 welding apparatus 101 electrode portion 101a terminal proximal end electrode 101a ₁ distal end surface 101b first terminal distal end side electrode 101b ₁ distal end surface 101c second Terminal tip side electrode 101c ₁ tip face 102A first pressurizing energizing part 102B second pressurizing energizing part 103A first pressurizing part 103B second pressurizing part 104A first energizing part 104B second energizing part 105A First transformer 105B Second transformer 106A First energization controller 106B Second energization controller Roller 107 current supply path 108 current path switching circuit α clearance

Claims (10)

A lead wire connection method in which a bent portion is provided between a terminal base end and a terminal distal end and a lead wire is sandwiched and connected to the bent portion of the connection terminal bent into a J shape,
A first step of sandwiching the lead wire inside the bent portion;
A second step of energizing between both ends of the bent portion while relatively pressing both ends of the bent portion sandwiching the lead wire toward the inside of the terminal bending direction;
The terminal base end and the terminal front end while relatively pressurizing the terminal base end and the terminal front end toward the inside in the terminal bending direction while performing the pressurization energization process in the second step or after the execution. A third step of energizing during
A method for connecting lead wires, comprising: The lead wire is covered with an insulating resin layer,
In the second step, by heating, the bent portion is heated to heat and soften the insulating resin layer, and then the heat softened state of the insulating resin layer is pushed out from the bent portion by pressurization.
In the third step, the gap between the bent portion and the lead wire is eliminated as much as possible by pressurization, and the terminal base end and the terminal tip are welded by energization. ,
The lead wire connecting method according to claim 1. In the second step, the first electrode is disposed at the terminal proximal end of the bent portion, and the second electrode is disposed at the terminal distal end of the bent portion, and then the first, Energizing between the first and second electrodes while relatively pressing the bent portion toward the inside of the terminal bending direction with the two electrodes,
In the third step, a third electrode is disposed at the terminal proximal end and a fourth electrode is disposed at the terminal distal end, and then the terminal proximal end and the terminal distal end are disposed by the third and fourth electrodes. And energizing between the third and fourth electrodes while relatively pressing toward the inside of the terminal bending direction,
The lead wire connecting method according to claim 1 or 2. In the second and third steps, pressurization is performed in a state where the first electrode and the third electrode are integrated, or in a state where the second electrode and the fourth electrode are integrated. Energize processing,
The lead wire connecting method according to claim 3. The third step performs at least the pressurization process of the pressurization process and the energization process at the same time as the second step.
The lead wire connecting method according to claim 1. A welding apparatus for a lead wire, wherein a bending portion is provided between a terminal proximal end and a terminal distal end, and a lead wire is sandwiched and welded to the bending portion of the connection terminal bent into a J shape,
A first electrode in contact with the outer side of the terminal proximal end of the bent portion;
A second electrode in contact with the outer side of the terminal tip side end of the bent portion;
A third electrode that contacts the outside of the terminal base end;
A fourth electrode that contacts the outside of the terminal tip;
A first pressurization energization is applied to the bent portion through the first and second electrodes while the first and second electrodes relatively pressurize the bent portion toward the inside of the terminal bending direction. And
While performing or applying the pressurization energization process by the first pressurization energization unit, the terminal base end and the terminal tip end are relatively directed inwardly in the terminal bending direction with the third and fourth electrodes. A second pressurizing energization section for energizing the terminal base end and the terminal tip end through the third and fourth electrodes while applying pressure;
A lead wire welding apparatus comprising: The lead wire is covered with an insulating resin layer,
The first pressure energization unit heats and softens the insulating resin layer by applying heat to the bent portion, and then pressurizes the insulating resin layer in the heat-softened state from the bent portion by pressurization. ,
The second pressurizing energization unit eliminates the gap between the bent portion and the lead wire as much as possible by pressurization, and then energizes the terminal proximal end and the terminal distal end. Welding,
The lead wire welding apparatus according to claim 6. Integrating the first electrode and the third electrode, or integrating the second electrode and the fourth electrode;
The lead wire welding apparatus according to claim 6 or 7. The first pressurization energization unit and the second pressurization energization unit share an energization unit.
The lead wire welding apparatus according to claim 6. The second pressurization energization unit performs at least the pressurization process of the pressurization process and the energization process simultaneously with the pressurization energization process of the first pressurization energization part.
The lead wire welding apparatus according to any one of claims 6 to 9.

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