KR102109501B1 - Jig apparatus for hairpin welding of rotary electric machine and hairpin welding method using same - Google Patents

Abstract

In the present invention, the hairpin welding of the rotating electric machine arranged to closely contact the hairpin ends 110 to be paired in order to weld the hairpin end 110 arranged on the armature or stator core 200 to be mounted on the rotating electric machine. Regarding a jig apparatus and a hairpin welding method using the same, the upper plate 10 and the lower plate 20 each having passages 11 and 21 for inserting the hairpin end groups 110s in the radial direction d3 before alignment ) Coaxially with the core 200 to rotate in opposite directions, thereby narrowing the circumferential direction d2 of the fitting space consisting of the overlapping spaces of the lower plate passage 11 and the upper plate passage 21, and the lower plate passage ( 21) and the width (d3) of the upper plate passage (11) becomes smaller in the direction opposite to the rotational direction, so the width (d3) of the radial direction of the fitting space is also narrowed.

Description

Jig apparatus for hairpin welding of rotating electric equipment and hairpin welding method using the same {JIG APPARATUS FOR HAIRPIN WELDING OF ROTARY ELECTRIC MACHINE AND HAIRPIN WELDING METHOD USING SAME}

The present invention is a jig device for welding a hairpin of a rotating electric machine and a hairpin welding method using the same, so that the ends of the hairpins to be paired are in close contact with each other to weld the ends of the hairpins arranged on the armature or stator core to be mounted on the rotating electric machine. It is about.

As shown in Figure 1, the hairpin (hairpin, 100) is an insulation-coated 'U' shaped copper wire, so that the two sides of the straight conductor portion 120 and the both ends of the straight conductor portion 120 are interconnected. A turn part 130 to be provided, and a hairpin end portion 110 with an insulating coating peeled off as an upper end of the straight conductor portions 120 on both sides. As shown in Figure 2, the hairpin 100 is used to form a coil by winding the core 200 of the armature or stator.

The hairpin 100 inserts and secures both sides of the straight conductor portion 120 into the slot 210 of the core 200, exposes the upper portion of a predetermined length to the upper axial direction d1 of the core 200, and turns 130 ) Is mounted on the core 200 in such a way that it is exposed under the axial direction of the core 200. Then, the upper portions of the straight conductor portions 120 on both sides exposed to the axial upper portion of the core 200 are bent and aligned according to a winding method. Looking at the aligned state, the hairpin end group 110s composed of a plurality of hairpin ends 110 arranged in the radial direction d3 of the core 200 has a predetermined angular spacing along the circumferential direction d2 of the core 200 It is arranged to be repeated.

In addition, the hairpin ends 110 belonging to each hairpin end group 110s are welded so as to be electrically connected in pairs of two to form a coil part of the core 200.

However, the hairpin ends of the hairpin end groups 110s arranged by bending are not aligned enough to be suitable for welding.

Accordingly, in order to increase the welding quality, it is necessary to perform welding after performing an alignment process in which the pair of hairpin ends 110 to be welded are in close contact, and for this purpose, Korean Patent Publication Nos. 10-2005-0061522 and Korean Registered Patent Nos. 10-0493609 Means for pressing the hairpin end group 110s from the inside and outside of the radial direction d3, means for pressing the hairpin end group 110s from both sides in the circumferential direction d2, and the hairpin ends of the hairpin end group 110s ( 110) It includes a means to insert between the pair.

However, Korean Patent Publication No. 10-2005-0061522 and Korean Patent Registration No. 10-0493609 are constructed to install and install each means separately, or to be individually driven to be configured in a complex structure and interlocked in a complicated driving manner. Should be, and a plurality of hairpin end groups (110s) arranged along the circumferential direction (d2) must be aligned and welded one by one, thus delaying welding time and deteriorating process efficiency. In addition, if the engagement between the respective means is not elaborated, the problem of not properly aligning the hairpin end groups 110s may also cause the welding defect.

KR 10-2005-0061522 A 2005.06.22. KR 10-0493609 B1 2005.05.26.

Therefore, the present invention operates a simple pressing structure by a simple driving method, and it is possible to stably pressurize both the circumferential and radial both sides of the hairpin end groups 110s simultaneously, and all hairpin end groups in the core 200. An object of the present invention is to provide a jig device for welding hairpins of a rotary electric machine capable of aligning (110s) with a single drive and a hairpin welding method using the same.

In order to achieve the above object, the present invention is for welding a hairpin end group (110s) comprising a plurality of hairpin ends (110) arranged in a radial direction (d3) from the top of a cylindrical core (200) to be mounted on a rotary electric machine. In the jig apparatus for welding hairpins for alignment, the upper plate member 10 and the lower plate member 20 each having passages 11 and 21 for inserting the hairpin end groups 110s before alignment are coaxial with the core 200. By rotating means 40 rotating in opposite directions, the circumferential direction (d2) of the fitting space consisting of the overlapping spaces of the lower plate passage 21 and the upper plate passage 11 is narrowed to decrease the width of the hairpin end groups 110s. The circumferential direction (d2) of both sides is pressed, as well as the width (d3) of the lower plate passage (21) and the upper plate passage (11) in the radial direction (d3) becomes smaller in the direction opposite to the rotational direction. The radial direction of space (d3) Radial direction (d3) both sides of the tongue portion groups hairpin end (110s) can also be pressed.

According to an embodiment of the present invention, the upper plate 10 and the lower plate 20 is a plurality of passages (11, 21) to receive the hairpin end group (110s) arranged in the circumferential direction on top of the core 200 one by one ), It is possible to align all the hairpin end groups (110s) at the same time.

According to an embodiment of the present invention, in at least one of the passages of the upper plate 10 passage 11 and the lower plate 20 passage 21, the radial direction d3 has the smallest circumferential direction d2. ) One side boundary (11a, 21a) is a plurality of hairpin ends 110 belonging to the hairpin end group (110s) in order to be in close contact with each other in pairs, the wedge 12 is inserted between the pair of hairpin ends to widen the gap, 22).

According to an embodiment of the present invention, the lower plate 20 passage 21 and the upper plate 10 passage 11 are formed in a trapezoid.

In addition, in order to achieve the above object, the present invention is a hairpin end group 110s composed of a plurality of hairpin ends 110 arranged in the radial direction d3 of the core 200 arranged at an isometric angle along the circumferential direction d2. For the hairpin welding of the core 200, the passages 11 are aligned with the arrangement of the hairpin end groups 110s in the upper plate member 10 and the lower plate member 20 to be rotated coaxially with the core 200 in opposite directions. , 21) is formed, the fitting space consisting of the overlapping space of the lower plate passage 21 and the upper plate passage 11 is composed of the number of the hairpin end groups 110s, and the lower plate passage 21 and the upper plate In the method for welding hairpins using a jig device for welding hairpins in which the width of the passageway 11 becomes smaller in the direction opposite to the direction in which the width of the radius d3 is rotated, the upper plate 10 and the lower plate 20 are Placed on top of the core 200, before alignment Eopin end portion groups the insertion step (S10) to be (110s) is received in one respective fitting space; Alignment step of rotating the upper plate 10 and the lower plate 20 in opposite directions, pressing and aligning both sides of the circumferential direction d2 and radial direction d3 of the hairpin end group 110s at the same time (S30) ; A welding step (S60) of sequentially welding the hairpin end groups 110s arranged in the circumferential direction d2; It includes; the separation step (S70) for separating the upper plate 10 and the lower plate 20 from the top of the core 200.

According to an embodiment of the present invention, the alignment step (S30), while rotating the upper plate 10 and the lower plate 20 in opposite directions, the wedge between hairpin end pairs belonging to the hairpin end group 110s ( 12, 22).

According to an embodiment of the present invention, the upper pressing step (S20) to equalize the height by pressing the hairpin end group 110s from the upper side with the pressing means 50; is performed before the alignment step (S30), and pressing The pressure release step (S40) for releasing the pressure by the means (50); is performed after the alignment step (S30).

According to an embodiment of the present invention, an inspection step (S50) for inspecting the alignment of the hairpin end groups 110s; is performed before the welding step (S60).

In the present invention, the circumferential direction and the radius of the upper plate 10 and the lower plate 20 are rotated in the fitting space formed by the overlapping region of the upper plate 10 passage 11 and the lower plate 20 passage 21. By simultaneously narrowing in the direction, the hairpin end groups 110s are simultaneously pressurized on both sides in the circumferential direction and on both sides in the radial direction, so that compared to the prior art separated by the circumferential pressing means and the radial pressing means, the hairpin end groups are welded. It can be properly aligned, can guarantee welding quality, and is easy to operate.

In addition, the present invention can align all the hairpin ends at the top of the core 200 by rotating the upper plate member 10 and the lower plate member 20, so that when welding the hairpin ends, only the welding process is performed without alignment. It is operated to perform, accordingly, it is possible to significantly shorten the welding time compared to prior art welding after sorting by the end group of the hairpin.

In addition, since the present invention aligns the ends of the hairpins in a pressurized state, the height of the hairpin ends can be made uniform, thereby minimizing welding defects.

In addition, the present invention also serves to protect the lower portion with the upper plate member 10 and the lower plate member 20 so that spatters generated during welding do not fall to the lower portion, thereby protecting the insulating film of the hairpin and welding To do.

1 is an exemplary view of a hairpin 100.
Figure 2 is an exemplary view of the cylindrical core 200 with the hairpin 100 inserted into the slot 210.
3 is a perspective view of a jig device for welding hairpins of a rotary electric machine according to an embodiment of the present invention.
4 is a perspective view of a jig device for welding hairpins separated from the upper plate 10 and the lower plate 20.
5 is a top view of a jig device for welding hairpins.
Figure 6 is a state diagram of using a jig device for welding hairpins disposed on the upper portion of the cylindrical core 200.
Fig. 7 is a top view of the state shown in Fig. 6;
8 is a top view of a state in which the upper plate 10 and the lower plate 20 are rotated in opposite directions in the state shown in FIG. 6.
9 is a flow chart of a hairpin welding method of a rotary electric machine according to an embodiment of the present invention.

The jig device for welding hairpins according to the present invention aligns the hairpin end groups 110s arranged on the upper part of the core 200 prior to the welding process, maintains the alignment during welding, and finishes the welding from the core 200 It is a device that can be used to separate and improve welding quality.

Since the hairpin 100 to be aligned has been described with reference to FIGS. 1 and 2 in [Technology as the Background of the Invention], a description thereof is omitted, and terms used to describe an embodiment of the present invention are defined. .

The axial direction d1 is the rotational axis direction of the rotary electric machine, and is the axial direction of the core 200. The axial direction d1 when describing the components of the present invention includes a direction parallel to the axis of the cylindrical core 200.

The circumferential direction d2 is a circumferential direction based on the axis of the core 200. The circumferential direction d2 may be divided into clockwise or counterclockwise directions according to the rotational direction.

The radial direction d3 is a radial direction around the axis of the core 200, and also includes a direction toward the axis of the core 200 from the outer circumferential side of the core 200. In order to distinguish the radial direction d3, the direction toward the axis is referred to as an inner circumferential direction, and the radial direction at the axis may be referred to as an outer circumferential direction.

The hairpin end group 110s is a set consisting of a plurality of hairpin ends 110 arranged in a line along a radial direction d3 from the top of the core 200 to be mounted on a rotary electric machine. These hairpin end groups 110s are arranged to be repeated at an equal angle along the circumferential direction d2 on the top of the core 200.

The hairpin end pair is a pair of two hairpin ends adjacent to a plurality of hairpin ends belonging to the hairpin end group 110s, which will be welded and electrically joined.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described so that those skilled in the art can easily carry out.

<Jig device for welding hairpins of rotary electric equipment>

3 is a perspective view of a jig device for welding hairpins according to an embodiment of the present invention, Figure 4 is a partially exploded perspective view of a jig device for welding hairpins separated from the upper plate 10 and the lower plate 20, Figure 5 is It is a top view of the jig device for hairpin welding.

The jig apparatus for welding hairpins according to an embodiment of the present invention allows the hairpin end groups 110s before alignment to face the passages 11 and 21 to be inserted in a circumferential direction and a radial direction, and faces the upper and lower passages 11 , 21) by narrowing the overlapping space between the circumferential sides and radially opposite sides, the hairpin ends 110s are configured to be pressed. Accordingly, a plurality of hairpin ends 110 constituting the hairpin end groups 110s can be brought into close contact.

The jig device for welding hairpins for this purpose includes an upper plate 10, a lower plate 20, a bearing means 30, a rotating means 40, a pressing means 50, a table 60 and a controller 70. .

The upper plate member 10 and the lower plate member 20 are discs having the axis of the core 200 as a central axis, and are stacked facing each other vertically and coaxially with the core 200 by the rotating means 40 in opposite directions to each other. It can be rotated.

According to an embodiment of the present invention, in order to facilitate the relative motion of the upper plate member 10 and the lower plate member 20 to be rotated in the opposite direction, the bearing means between the upper plate member 10 and the lower plate member 20 ( 30) was installed to face up and down at intervals. However, since the angle to rotate the upper plate 10 and the lower plate 20 is very small and does not need to be rotated at high speed, the upper plate 10 may be placed on the lower plate 20 without bearing means 30.

In addition, the upper plate 10 and the lower plate 20 are provided with passages 11 and 21 facing each other to accommodate the hairpin end groups 110s. Accordingly, the hairpin end group 110s may be sequentially inserted into the lower plate 20 passage 21 and the upper plate 10 passage 11.

Here, the passage 11 of the upper plate 10 and the passage 21 of the lower plate 20 are smaller in width in the direction opposite to the direction to be rotated by the rotation means 40 in the radial direction d3. Is formed.

Referring to FIG. 4, since the upper plate 10 will be rotated clockwise by the rotation means 40, the width of the radial direction d3 of the passage 11 formed in the upper plate 10 is counterclockwise. It becomes small. Since the lower plate 20 is to be rotated counterclockwise by the rotation means 40, the width of the passageway 21 of the passage 21 formed in the lower plate 20 is smaller in the clockwise direction.

In addition, in the passage 11 of the upper plate 10 and the passage 21 of the lower plate 20, at least one of the circumferential boundaries 11a and 21a having the smallest width in the radial direction d3 is the hairpin end group 110s. Since it will pressurize the circumferential side of), it is formed in a shape cut in the radial direction d3.

Referring to the top view of FIG. 5, the passage 11 of the upper plate 10 and the passage 21 of the lower plate 20 are each formed in a trapezoidal shape. The upper plate 10 and the lower plate 20 will accommodate the hairpin end groups 110s after allowing large areas of the radial direction d3 to face each other in the passages 11 and 21, if possible, so that both boundary surfaces in the circumferential direction It is preferable that all of these are formed in a surface cut in the radial direction d3.

Here, the radial (d3) width and the circumferential (d2) width of the upper plate (10) passage (11) and the lower plate (20) passage (21) can penetrate the hairpin end groups (110s) before alignment. However, the radial direction d3 width gradually decreasing along the circumferential direction d2 is formed to decrease by at least the width of the radial direction d3 of the hairpin end groups 110s after alignment.

Accordingly, as the space where the upper plate 10 passage 11 and the lower plate 20 passage 21 overlap and overlap, the circumferential direction (d2) of the fitting space formed to fit the hairpin end groups 110s ) Width and radial (d3) width can be reduced simultaneously by rotating the upper plate 10 and the lower plate 20 in opposite directions.

In addition, the passage 21 of the lower plate 20 is formed to be wider toward the lower portion, so that the hairpin end group 110s can be smoothly inserted from below. The passage 21 of the upper plate 10 is formed to be wider toward the upper portion, so that it does not interfere with welding when welding the upper surface of the hairpin end 110.

Accordingly, after receiving the lower portion in the passages 11 and 21 among the hairpin ends 110 from which the insulating coating has been peeled off, even if it is pressed as described later, the upper plate member 10 and the lower plate member 20 exclude the pressing portion. The thickness of the rest of the parts can be made large and firmly constructed.

In addition, the wedges 12 and 22 are provided in at least one of the passage 11 of the upper plate 10 and the passage 21 of the lower plate 20.

The wedges 12 and 22 are formed at one of the circumferential borders 11a and 21a in the radial direction d3 having the smallest width in the passages 11 and 21, but between the hairpin end pairs belonging to the hairpin end group 110s. It is configured to fit in a position that can be fitted to, it is possible to widen between the end pair of the hairpin. Thus, the two hairpin ends of the hairpin end pair can be in close contact with each other. At this time, the wedges 12 and 22 are formed to protrude so that the width of the radial direction d3 becomes smaller in the circumferential direction d2, so that they can be smoothly fitted between the hairpin end pairs.

On the other hand, as shown in Fig. 4, the wedges 12 and 22 are formed to extend so as to be formed thicker than the thicknesses of the circumferential boundaries 11a and 21a of the passages 11 and 21. That is, the wedge 12 provided in the passage 11 of the upper plate 10 is formed to extend upward, and the wedge 22 provided in the passage 21 of the lower plate 20 extends downward. Is formed. Thus, the wedges 12 and 22 can be configured to be rigid in the form of a triangular prism.

As described above, passages 11 and 21 provided in the upper plate 10 and the lower plate 20 are provided in plural according to the positions of the plurality of hairpin end groups 110s arranged in a circumferential direction on the upper portion of the core 200. Thus, it is possible to accommodate all the hairpin end groups 110s of the core 200 one by one. That is, as described later, by rotating the upper plate 10 and the lower plate 20, all the hairpin end groups 110s can be aligned.

And, the upper plate 10 and the lower plate 20 is formed of a disk, to guide the rotational movement to the guide portion 41 below, and provided with a gripping portion 23 extending outwardly on the outer circumferential side By doing so, it is possible to hold and hold the gripping parts 13 and 23 with the following driving device 42.

The bearing means 30 is a component for smoothly moving the upper plate 10 and the lower plate 20 in opposite directions.

4, the bearing means 30 may be configured as a ball. On the upper surface of the lower plate 20, a groove 24 for drawing a circle around a rotation axis (rotation axis of the core) is formed, and although not shown in FIG. 4, the lower plate 20 on the bottom surface of the upper plate 10 The same grooves facing the grooves 24 of are formed. In addition, a plurality of balls 30 fitted to each of the grooves 24 of the lower plate 20 and the grooves of the upper plate 10 less than half each are arranged to draw a circle with each other, so that the upper plate 10 It is possible to smoothly move the relative motion while not directly contacting the lower plate 20 with.

The bearing means 30 need not be limited to a ball, and may be made of, for example, a lubricating paper or resin paper impregnated with a lubricant or adhered to a surface, or a thin sheet material having low friction.

As another example, the bearing means 30 may be configured to reduce friction by blowing gas (air, argon, nitrogen, etc.) between the upper plate member 10 and the lower plate member 20, and for this purpose, the upper plate member ( 10) and a lower plate (20) to create a hole in any one, it is possible to install an air pump to blow air through the hole. As described above, a gas layer may be formed between the upper plate member 10 and the lower plate member 20 to reduce friction, and in addition, it may function to cool during welding and prevent metal oxidation.

However, according to the present invention, since the upper plate 10 and the lower plate 20 are rotated at an angle smaller than the angle difference between the adjacent end groups of hairpins in the circumferential direction, it is not necessary to make the bearing means 30 an essential component. That is, the bearing means 30 is not provided, and instead, the upper plate 10 may be placed on the lower plate 20. Of course, the contact surface between the upper plate member 10 and the lower plate member 20 may be plated to minimize friction, and in addition, a lubricant may be applied.

The table 60 is provided with a window 60a of which the upper end of the core 200, that is, the hairpin end group 110s arranged along the circumferential direction d2 is inserted from the bottom to the top, and the window ( The rotation means 40 is mounted along the circumferential direction of 60a).

The table 60 is installed on the base plate 62 by the pillars 61. The base plate 62 is formed with a window 62a facing up and down with the window 60a of the table 60. Accordingly, the core 200 may be inserted into the window 62a of the base plate 62 to protrude the upper portion of the hairpin end group 110s upward through the window 60a of the table 60. In this way, the fitting position of the core 200 formed by the upper and lower windows 60a and 62a is set to a fixed position, and an overlapping region between the upper plate 10 passage 11 and the lower plate 20 passage 21 is formed. The hairpin end group 110s can be accurately inserted into the fitting space.

The rotation means 40 is disposed along the circumferential direction of the table 60 and the window 60a so that the upper plate 10 and the lower plate 20 can be stably rotated at the top of the table 60 window 60a. It includes a driving unit 42 capable of holding and holding the guide portion 41 and the gripping portion 13 of the upper plate member 10 and the gripping portion 23 of the lower plate member 20.

The guide portion 41 is installed at intervals along the circumferential direction of the table 60, the window 60a, and freely rotates in the rotational axis in the axial direction d1 while supporting the edge portion of the lower plate 20 from below. It is composed of a guide roller for this purpose. Since the upper plate 10 and the lower plate 20 will rotate in opposite directions, the upper side 41a of the guide portion 41 in contact with the upper plate 10 is the lower side in contact with the lower plate 20 It is separated so that it can rotate coaxially to (41b).

The driving device 42 can hold the gripping portion 13 of the upper plate 10 and push or pull it in the circumferential direction to rotate it forward and backward, and hold the gripping portion 23 of the lower plate 20 and follow the circumferential direction It is classified as being able to rotate forward or backward by pushing or pulling. According to the shape of the passages 11 and 21 partially enlarged in FIG. 4, the forward rotation direction of the upper plate 10 is clockwise, the forward rotation direction of the lower plate 20 is counterclockwise, and accordingly The driving device 42 is arranged. Here, the forward rotation is a rotation for reducing the above-mentioned fitting space, and the reverse rotation is a rotation for expanding the above-mentioned fitting space, and is rotated forward to release the pressure after completion of welding in the state where the hairpin end groups 110s are aligned. need.

The driving device 42 may be configured as a hydraulic cylinder or a pneumatic cylinder.

However, the configuration for rotating the upper plate 10 and the lower plate 20 forward and backward may not be limited to this. For example, the upper plate 10 and the lower plate 20 may be configured with pinions having teeth on the outer circumferential side, and the driving device 42 may be configured with a rack to rotate the pinion. As another example, the upper plate 10 and the lower plate 20 may be composed of gears with teeth on the outer circumference side, and the driving device 42 may be configured with a motor that rotates other gears meshed with the gears. That is, an appropriate configuration may be selected from various configurations for forward and reverse rotation of the upper plate 10 and the lower plate 20.

The pressing means (50) is configured to simultaneously press the plurality of hairpin end groups (110s) arranged along the circumferential direction (d2) on the top of the core (200) from the top, to equally match the heights of all hairpin ends (110). Element.

The pressing means 50 is operated to press the hairpin end 110 during the process of aligning the hairpin end 110 by rotating the upper plate member 10 and the lower plate member 20.

The plate material for pressing the hairpin end group 110s in the pressing means 50 may be formed of any one of a transparent plate, a translucent plate, and an opaque plate.

The controller 70 is a component that controls the driving device 42 of the rotating means 40 and the pressing means 50 to press the upper part, the upper plate 10 passage 11 and the lower plate 20 passage ( 21) is operated in a state in which the hairpin end group 110s is fitted in the fitting space, which is the overlapping area, and the process of pressing the hairpin end group 110s with the pressing means 50, the driving device 42 is operated to move the upper part The process of rotating the plate 10 and the lower plate 20 in opposite directions to each other, and sequentially releasing the pressure by the pressing means 50 are controlled.

The controller 70 rotates the lower plate 20 and the upper plate 10 simultaneously in the same direction, the same rotational speed, and the same rotation range during the process of fitting the hairpin end groups 110s into the fitting space, thereby making the hairpin end groups ( 110s) to be accommodated smoothly in the fitting space. Here, the forward and reverse rotation range will be about the width of the circumferential direction from the lower end of the passage 21 of the lower plate 20.

Then, when the welding process is completed, the controller 70 further performs a process of rotating the upper plate 10 and the lower plate 20 by operating the driving device 42, thereby completing the welding hairpin end group 110s. It can be removed from the fitting space.

6 to 8, look at before and after the alignment of the hairpin end group (110s).

FIG. 6 is a state diagram of a jig device for welding hairpins disposed on an upper portion of a cylindrical core 200, FIG. 7 is a top view of the state shown in FIG. 6, and FIG. 8 is an upper plate material in the state shown in FIG. 10) and the lower plate 20 is a top view of the state rotated in opposite directions.

As shown in FIG. 6, the upper plate 10 and the lower plate 20 of the jig device for welding hairpins are disposed on the upper portion of the core 200, so that the hairpin end group 110s passes through the lower plate 20 passage ( 21) and the upper plate 10 can be sequentially fitted into the passage (11).

At this time, the fitting space, which is an overlapped space between the lower plate 20 passage 21 and the upper plate 10 passage 11, can be inserted into the hairpin end group 110s before alignment, as shown in FIG. 7. It is widened.

Next, as shown in FIG. 8, the driving devices 42-1 and 42-2 for rotating the upper plate 10 are operated to rotate the upper plate 10 clockwise (CW), and the lower plate If the lower plate 20 is rotated counterclockwise (CCW) by actuating the driving devices 42-3, 42-4 for rotation of the 20, the upper plate 10 passage 11 and the lower plate ( 20) In the passage 21, the distance between the circumferential one-sided borders 11a and 21a having the smallest radial d3 width is reduced.

Accordingly, since the hairpin end groups 110s are compressed by pressing on both sides in the circumferential direction d2, a plurality of hairpins 110 are aligned in a line along the radial direction.

In addition, the width in the radial direction (d3) of the fitting space is narrowed, and the hairpin end groups 110s are pressed and pressed from both sides in the radial direction (d3), and the wedges 12 and 22 are opened between the hairpin end pairs. Since the hairpin ends 110, the hairpin ends 110 are arranged in close contact with each other. In this state, by welding the hairpin ends 110 to be joined to each hairpin end pair, it is possible to ensure welding quality.

<Hairpin welding method for rotary electric equipment>

9 is a flow chart of a hairpin welding method according to an embodiment of the present invention.

The hairpin welding method is a welding method using the above-described jig device for welding hairpins, the insertion step (S10), the upper pressing step (S20), the alignment step (S30), the pressure release step (S40), the inspection step (S50), welding It is made in the order of step S60 and separation step S70.

First, an insertion step (S10) is performed.

In the insertion step (S10), the hairpin welding jig as shown in FIGS. 6 and 7 shows the core 200 unaligned before welding the hairpin end group 110s arranged along the circumferential direction d2 on the upper part. By arranging according to the insertion position of the device, the upper plate 10 and the lower plate 20 are placed on top of the core 200. Accordingly, a plurality of hairpin end groups 110s arranged at equal angles along the circumferential direction d2 is accommodated one in each fitting space.

Here, the fitting space is an overlapping space between the upper plate 10 passage 11 and the lower plate 20 passage 21, as described above, so that the hairpin end groups 110s are fitted in the expanded state if possible. The upper side of the hairpin end group 110s protrudes over the fitting space, so that welding can be performed as described below, and only the lower side of the hairpin end group 110s is inserted into the fitting space.

On the other hand, when inserting the hairpin end group 110s into the fitting space, the fitting space is fluctuated along the circumferential direction, so that even if there is a slight deviation from the position of the fitting space among the plurality of unaligned hairpin end groups 110s To be inserted into the fitting space. The method of swinging the fitting space is a method of controlling the rotating means 40 so as to rotate the upper plate 10 and the lower plate 20 simultaneously in the same direction, the same rotation speed, and the same rotation range as described above. do.

Next, the upper pressing step (S20) is performed.

In the upper pressing step (S20), the plurality of hairpin end groups 110s arranged at equal angles along the circumferential direction d2 is simultaneously pressed using the pressing means 50. Accordingly, a plurality of hairpin end groups 110s as well as a plurality of hairpin end groups 110 belonging to each hairpin end group 110s are placed at a uniform height.

Next, an alignment step (S30) is performed.

In the alignment step (S30), the hairpin end group 110s in the state of being pressed by the pressing means 50 from the top is aligned so that the hairpin ends 110 for each hairpin end pair are in close contact with each other. To this end, the rotating means 40 is controlled to rotate the upper plate 10 and the lower plate 20 forward in opposite directions. Accordingly, a plurality of hairpin end groups 110s arranged at an equal angle along the circumferential direction d2 may be aligned at the same time.

As described above, the upper plate 10 passage 11 and the lower plate 20 passage 21, which form a fitting space, become narrower in the radial direction (d3) and narrower in the opposite direction to the direction of forward rotation. The wedges 12 and 22 are formed according to the portion where the width of the direction d3 is minimal. Accordingly, the fitting space simultaneously narrows the circumferential (d2) width and the radial (d3) width and widens the hairpin end pairs with wedges (12, 13), so that the two hairpin ends belonging to each hairpin end pair Are in close contact with each other.

Next, the pressure release step (S40) is performed.

In the pressing release step (S40), the pressing by the pressing means 50 is released. To this end, after lifting the pressing means 50 to the top, the hairpin end group 110s is moved to the side so as not to cover the top. The hairpin end group 110s can be seen as the upper plate 10 and the lower end plate 20 pressed and held, so that even when the pressure is released from the upper portion, it maintains a uniform height.

Next, an inspection step (S50) is performed.

In the inspection step (S50), the alignment state of the hairpin ends 110 belonging to each hairpin end group 110s is inspected by the inspection device 300. For example, the inspection device 300 may be configured with a line laser to check whether the height of the hairpin end 110 and the distance between the hairpin ends 110 are uniformly aligned within a tolerance range. As another example, the inspection device 300 may be configured as an image reading device to inspect the contact state and spacing of the hairpin end pair.

As a result of the inspection, if the hairpin end pairs are aligned within a predetermined tolerance range, the next welding step (S60) is performed.

In the welding step S60, the hairpin ends are joined to each hairpin end pair by using the welding machine 400. The welding machine 400 may be a laser welding machine.

All the hairpin ends 110 on the upper part of the core 200 are aligned by the alignment step (S30) so as to be in close contact with each other in pairs, so only the welding process needs to be performed in the welding step (S60). Accordingly, compared to the prior art of welding by aligning one by one hairpin end groups 110s, welding time can be significantly shortened.

When the welding is completed, the following separation step (S70) is performed.

In the separating step (S70), the jig device for welding hairpins is separated from the core 200 to obtain the core 200 where hairpin welding is completed.

In the above, in order to illustrate the technical spirit of the present invention, a specific embodiment has been shown and described, but the present invention is not limited to the same configuration and operation as the specific embodiment as described above, and various modifications are within the scope of the present invention. Can be carried out in Therefore, such modifications should also be regarded as belonging to the scope of the present invention, and the scope of the present invention should be determined by the claims below.

d1: axial direction d2: circumferential direction d3: radial direction
10: upper plate
11: passage 11a: circumferential direction one side boundary
12: wedge 13: gripping part
20: lower plate
21: passage 21a: one side circumferential direction
22: wedge 23: gripping part
30: bearing means
40: rotating means
41: guide portion 42: driving device
50: pressing means
60: table
70: controller
100: hairpin
110: hairpin end 110s: hairpin end group
120: straight conductor portion 130: turn portion
200: core 210: slot

Claims (16)

On the jig device for welding hairpins for arranging hairpin end groups 110s made of a plurality of hairpin ends 110 arranged in a radial direction (d3) from the top of the cylindrical core 200 to be mounted on a rotary electric machine for welding. In,
The upper plate 10 and the lower plate 20, respectively, provided with passages 11 and 21 facing the hairpin end groups 110s before and after the alignment, are rotated in the opposite direction to each other coaxially with the core 200. By the rotating means 40, the circumferential direction (d2) of the fitting space consisting of the overlapped spaces of the lower plate passage (21) and the upper plate passage (11) is narrowed, so that both sides of the circumferential direction (d2) of the hairpin end group (110s) In addition to pressing, the width of the radial direction (d3) of the lower plate passage (21) and the upper plate passage (11) becomes smaller in the direction opposite to the rotational direction, so that the radial direction (d3) of the fitting space The width is also narrowed, and both sides of the radial direction (d3) of the hairpin end group 110s are also pressed.
Jig device for welding hairpins of rotary electric equipment. According to claim 1,
The upper plate 10 and the lower plate 20 is
A plurality of passages 11 and 21 are provided to receive the hairpin end groups 110s arranged in a circumferential direction on the upper part of the core 200, so that all of the hairpin end groups 110s can be aligned at the same time.
Jig device for welding hairpins of rotary electric equipment. According to claim 1,
The lower plate 20, the passage 21 is formed to be wider toward the downward direction
Jig device for welding hairpins of rotary electric equipment. According to claim 1,
The upper plate 10, the passage 11 is formed to be wider toward the upward direction
Jig device for welding hairpins of rotary electric equipment. According to claim 1,
In at least one of the upper plate 10 passage 11 and the lower plate 20 passage 21, the radial direction (d3) has the smallest circumferential direction (d2) at least one circumference (11a, 21a). The
In order to make the plurality of hairpin ends 110 belonging to the hairpin end groups 110s in close contact with each other in pairs, the wedges 12 and 22 that are interposed between the hairpin end pairs and widen the gap are provided.
Jig device for welding hairpins of rotary electric equipment. According to claim 1,
The rotating means 40
In the process of sequentially fitting the hairpin end groups 110s into the lower plate 20 passage 21 and the upper plate 10 passage 11, the lower plate 20 and the upper plate 10 are the same at the same time. It is rotated forward and backward within the same direction, the same rotation speed and the same rotation range.
Jig device for welding hairpins of rotary electric equipment. According to claim 2,
The rotating means 40
The lower plate member 20 and the upper plate member 10 are rotatably supported from the outside to the guide unit 41, and the outer circumferential side is held and rotated.
Jig device for welding hairpins of rotary electric equipment. The method of claim 7,
The guide portion 41 of the rotation means 40 is
Consists of a guide roller that can be rotated in the axial direction (d1) of the core 200
Jig device for welding hairpins of rotary electric equipment. According to claim 1,
The lower plate 20 passage 21 and the upper plate 10 passage 11 are
Trapezoidal
Jig device for welding hairpins of rotary electric equipment. According to claim 1,
Further provided with a pressing means for pressing the hairpin end group (110s) fitted in the fitting space formed by the lower plate member (20) passage 21 and the upper plate member (10) passage (11) from the top
Jig device for welding hairpins of rotary electric equipment. For the hairpin welding of the core 200 in which the hairpin end groups 110s made up of the plurality of hairpin ends 110 arranged in the radial direction d3 of the core 200 are arranged at an equal angle along the circumferential direction d2, The passages 11 and 21 aligned with the arrangement of the hairpin end groups 110s are formed on the upper plate 10 and the lower plate 20 to be rotated coaxially with the core 200 in opposite directions, respectively, and the lower plate passages ( 21) and the fitting space consisting of the overlapping space of the upper plate passage 11 is formed as many as the number of the hairpin end groups 110s, and the width in the radial direction d3 of the lower plate passage 21 and the upper plate passage 11 In the hairpin welding method using a jig device for a hairpin welding that becomes smaller in the direction opposite to the direction to rotate,
An insertion step (S10) of arranging the upper plate member 10 and the lower plate member 20 at the top of the core 200 so that the hairpin end groups 110s are accommodated in each fitting space one by one before alignment;
Alignment step of rotating the upper plate 10 and the lower plate 20 in opposite directions, pressing and aligning both sides of the circumferential direction d2 and radial direction d3 of the hairpin end group 110s at the same time (S30) ;
A welding step (S60) of sequentially welding the hairpin end groups 110s arranged in the circumferential direction d2;
Separation step (S70) for separating the upper plate 10 and the lower plate 20 from the top of the core 200;
Containing
Method for welding hairpins of rotary electric equipment. The method of claim 11,
The insertion step (S10) is
The lower plate 20 and the upper plate 10 are rotated forward and backward in the same direction, and the hairpin end groups 110s are accommodated in the fitting space.
Method for welding hairpins of rotary electric equipment. The method of claim 11,
The alignment step (S30)
While rotating the upper plate 10 and the lower plate 20 in opposite directions, the wedges 12 and 22 are fitted between the pair of hairpin ends belonging to the hairpin end group 110s.
Method for welding hairpins of rotary electric equipment. The method of claim 13,
The alignment step (S30)
In at least one of the upper plate passage 11 and the lower plate passage 21, the wedges 12 and 22 formed at one boundary of the circumferential direction d2 having the smallest width in the radial direction d3 are used.
Method for welding hairpins of rotary electric equipment. The method of claim 11,
The pressurization means 50 to press the hairpin end group (110s) from the top to the upper pressing step (S20) to even the height; is performed before the alignment step (S30),
Pressure release step (S40) for releasing the pressure by the pressing means 50; to perform after the alignment step (S30)
Method for welding hairpins of rotary electric equipment. The method of claim 11,
Inspection step (S50) for checking the alignment of the hairpin end group (110s); is performed before the welding step (S60)
Method for welding hairpins of rotary electric equipment.

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