Welding device

Abstract

To provide a welding device which suppresses generation of interference between a clamper and a welding jig.SOLUTION: A welding device 1 welds a power line 21 and a coil 22 which are used for a stator 2. The welding device comprises: a clamper 12 which operates in a perpendicular direction with respect to an axial direction of the stator 2 and is disposed above one end of the power line 21, thereby fixing the power line 21 in the axial direction while holding it with a set jig 11 disposed on the lower side of the power line 21; and a processing jig 13 which moves in the perpendicular direction with respect to the axial direction while passing the upper side of the clamper 12, thereby approaching a position where the power line 21 and the coil line 22 are abutted and performing ultrasonic welding on the power line 21 and the coil line 22.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a power line welding device. [Background technology]

[0002] In recent years, ultrasonic joining has been used in the processing of stators, in which a coil wire and a power line are joined using ultrasonic waves.

[0003] For example, in this ultrasonic bonding, with a portion of the power line placed on the terminal, a clamper is lowered from above to abut against and press the power line to fix it on the terminal, and then a processing jig welds the coil wire and the power line fixed by the clamper at a joint location that is different from the terminal. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-036557 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when ultrasonic bonding is performed, the processing jig generally moves laterally to approach the joint. At this time, the clamper, which is pressing the power line from above with its terminal, may be positioned on the path of the processing jig, which may cause interference between the clamper and the processing jig.

[0006] The present disclosure provides a welding device that suppresses interference between a clamper and a processing jig. [Means for solving the problem]

[0007] The welding apparatus according to the present disclosure is a welding apparatus for welding a power line and a coil wire used in a stator, and includes a clamper that operates in a direction perpendicular to the axial direction of the stator, and is arranged above one end of the power line, thereby clamping and fixing the power line in the axial direction between it and a setting jig arranged below the power line, and a processing jig that moves in a direction perpendicular to the axial direction while passing above the clamper, approaches the position where the power line and the coil wire abut, and performs ultrasonic welding of the power line and the coil wire. This allows welding to be performed without the clamper being positioned on the movement path of the processing jig. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to provide a welding device that suppresses interference between a clamper and a processing jig. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating an example of a configuration of a welding device and a power line according to a first embodiment. [Figure 2] 3 is a diagram showing a part of the state of the welding device in the welding process according to the first embodiment. FIG. [Figure 3] FIG. 2 is a diagram showing an example of a welding flow according to the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Embodiment 1 Hereinafter, a welding device according to this embodiment will be described with reference to the drawings. Welding device 1 is a device for ultrasonically joining power line 21 and coil wire 22 used in stator 2. In the following description, the location where power line 21 is fixed by welding device 1 will be referred to as terminal portion 21a, and the location where power line 21 is ultrasonically joined to coil wire 22 will be referred to as joint portion 21b.

[0011] 1A and 1B are diagrams showing the configuration of a welding device 1 and examples of three shapes of power lines, which will be described later. As shown in Fig. 1A, the welding device 1 includes a setting jig 11 disposed below a terminal portion 21a of a power line 21, a clamper 12 disposed above the terminal portion 21a of the power line 21 to fix the power line 21, and a processing unit (processing jig) 13 that ultrasonically joins a joint portion 21b of the power line 21 and a coil wire 22.

[0012] 1(a) is a schematic diagram showing the locations where the power lines 21 and coil wires 22 provided on the stator 2 are arranged, viewed from the side, i.e., from a direction perpendicular to the axial direction of the stator 2. In the following description, the axial direction of the stator 2 is the vertical direction, and the direction perpendicular to the axial direction is the horizontal direction.

[0013] 1(a), the power line 21 will be described as being formed in an L-shape when viewed from the side. Here, the tip end of the power line 21 is designated as a terminal portion 21a, and the terminal portion 21a is disposed so as to extend horizontally. Meanwhile, among the portions of the power line 21 extending in the vertical direction, the portion that abuts the coil wire 22 is designated as a joint portion 21b.

[0014] The shape of the power line 21 can be changed as appropriate, and as an example, as shown in Fig. 1(b), the terminal portion 21a can have a surface in the vertical direction and a hole penetrating the surface in the vertical direction. Furthermore, the shape of the power line 21 between the terminal portion 21a and the joint portion 21b can be changed as desired.

[0015] 1(a) and 1(b), power line 21 can be slightly bent toward the side where coil wire 22 contacts, at the location where processing jig 13 contacts. That is, a step is provided at joint 21b, and processing jig 13 and joint 21b can be brought into contact at this step, which makes it easy to adjust the positions of processing jig 13 and joint 21b in welding device 1. At the same time, this bending brings joint 21b of power line 21 and coil wire 22 closer to each other, making them more likely to come into contact with each other.

[0016] 2(a) to 2(d) are diagrams showing examples of states of the welding device 1 during the welding process. Specifically, Fig. 2(a) to 2(d) show an example of the operation from fixing the terminal portion 21a of the power line 21 and performing welding until the fixing of the terminal portion 21a is released.

[0017] As shown in FIG. 2(a), the terminal portion 21a of the power line 21 is placed on the setting jig 11. The clamper 12 is provided above the setting jig 11. The clamper 12 is capable of rotating about a shaft 31 provided horizontally on the setting jig 11. This allows the clamper 12 to move horizontally from a position on the setting jig 11 away from the location where the terminal portion 21a is placed to a position above the terminal portion 21a placed on the setting jig 11.

[0018] Therefore, as shown in Fig. 2(b), the clamper 12 can clamp and fix the terminal portion 21a of the power line 21 in the vertical direction between itself and the setting jig 11 arranged below. In the following, as shown in Fig. 2(a), the state in which the clamper 12 is arranged at a position away from the position where the terminal portion 21a is to be placed on the setting jig 11 is referred to as the released state, and as shown in Fig. 2(b), the state in which the clamper 12 operates from the released state and is arranged above the terminal portion 21a to fix the terminal portion 21a is referred to as the fixed state.

[0019] As shown in Fig. 2(b), after the terminal portion 21a has been fixed by the clamper 12, the processing jig 13 approaches the joint portion 21b of the power line 21 to join the power line 21 and the coil wire 22. Fig. 2(c) is a diagram showing the state of ultrasonic bonding by the processing jig 13. Fig. 2(d) shows the state after ultrasonic bonding by the processing jig 13, in which the clamper 12 has moved horizontally by rotating, changing from the fixed state to the released state.

[0020] As shown in FIG. 2(b), the processing jig 13 passes above the clamper 12 while moving horizontally, and can approach the joint 21b of the power line 21.

[0021] Next, a description will be given of the operation of the welding device 1. Fig. 3 shows an example of the flow of the operation of the welding device 1.

[0022] First, the stator 2 arrives at a processing position of processing equipment (not shown) (step S1). The processing equipment has a parts box containing a plurality of power lines 21, each of which has a terminal portion 21a. The processing equipment also has a loader for moving the power lines 21.

[0023] Next, the loader removes the power line 21 from the parts box and moves it to a state where it is placed on the setting jig 11 (step S2).

[0024] The processing equipment moves the setting jig 11 on which the power line 21 is placed to the processing position of the stator 2 (step S3).

[0025] 2(a) and 2(b), the clamper 12 is rotated so as to change from the released state to the fixed state (step S4). As a result, the terminal portion 21a of the power line 21 is sandwiched and fixed between the setting jig 11 and the clamper 12. The power for rotating the clamper 12 can be a servo or the like, but other power sources may also be used.

[0026] 2(b), the processing jig 13 moves horizontally to approach the joint 21b (step S5). At this time, the coil wire 22 is in contact with the joint 21b of the power line 21.

[0027] 2(c), after the processing jig 13 comes into contact with the joint portion 21b, the processing jig 13 starts ultrasonic vibration (step S6), thereby performing ultrasonic joining of the power line 21 and the coil wire 22.

[0028] 2(d), the processing jig 13 moves and retreats after the joining is completed (step S7). Typically, the processing jig 13 moves in the opposite direction to the movement direction in step S5. Furthermore, the clamper 12 moves horizontally by rotating so as to change from the fixed state to the released state.

[0029] The processing equipment moves the setting jig 11 away from the processing position of the stator 2 (step S8).

[0030] In this way, in the welding device 1, the clamper 12 can be moved horizontally by rotating around an axis extending horizontally, thereby switching between a fixed state in which the terminal portion 21a of the power line 21 is fixed on the setting jig 11 and a released state in which the fixed state is released.

[0031] Therefore, in the welding device 1, it is not necessary to configure the clamper 12 so that it extends long upward, and it is possible to suppress interference with the processing jig 13 that passes above the clamper 12. Furthermore, the processing equipment does not need to have the clamper 12 long in the vertical direction, and has a lift-less structure, which allows for space saving in the height direction.

[0032] The present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention. In other words, the above description has been omitted or simplified as appropriate for the sake of clarity, and a person skilled in the art can easily modify, add, or convert each element of the embodiment within the scope of the present invention. [Explanation of symbols]

[0033] 1. Welding equipment 2 stator 11 sets of jigs 12 Clamper 13 Processing section (processing jig) 21 Power line 21a Terminal section 21b Joint 22 Coil wire

Claims

[Claim 1] A welding device for welding a power line and a coil wire used in a stator, a clamper that operates in a direction perpendicular to the axial direction of the stator, and is disposed above one end of the power line, thereby clamping and fixing the power line in the axial direction between the clamper and a setting jig that is disposed below the power line; a processing jig that moves in a direction perpendicular to the axial direction while passing above the clamper, approaches a position where the power line and the coil wire are in contact with each other, and performs ultrasonic welding on the power line and the coil wire. Welding equipment.

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