JPH0937524A - Apparatus for forming hexagonal coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a coil with high precision while the coil is not removed until the forming is completed by a method wherein a pair of forming arms are inclined outward and straight part clamping tools and an end clamping tool are made to descend. SOLUTION: A pair of forming arms 3a and 3b of a straight part forming unit U1 are in standing postures. The straight parts 92 and 93 of an original coil K are clamped by respective straight part clamping tools C1 and C2 and the end part of the coil K is clamped by an end clamping tool C3 . In this state, if the forming arms 3a and 3b are inclined outward by angles α1 and α2 respectively with a horizontal fulcrum shaft 4 as the center of inclinations, the respective straight parts 92 and 93 of the original coil K which are positioned vertically are moved in directions separating them from each other and a hexagonal coil is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a hexagonal coil used in a large rotating electric machine.

[0002]

2. Description of the Related Art A coil used in a large rotating electric machine is
Its shape is a three-dimensional hexagonal shape, and its molding is bending,
It is performed in a complicated process such as twisting. 13 to 16 show a conventional method for forming the original coil K into the hexagonal coil K ₂ . In the conventional device, the basic base 91
A pair of end part molding units U ₅ are arranged at opposite ends of the base end face to face each other, and at the center thereof, a pair of straight part molding units U ₆ are formed in a width of the basic base 91. They are arranged to face each other along the direction. Each end portion forming unit U _5, are respectively mounted the end clamp fixture C _5, each forming A constituting the linear portion forming unit U ₆ - attached to the arm 96, the linear portion clamp fixture C _6, C _7, respectively Has been. A guide rail 97 is arranged in the width direction of the basic base 91, and each linear portion forming unit U ₆
Has a mechanism that moves in the width direction of the base 91. Also, straight portions clamp fixture C ₆ is formed A through the pivot shaft 98 - have been supported on arm 96, and has a mechanism that rotates about the pivot axis 98.

The original coil K has a trapezoidal shape,
Each of the lower mouth side and upper mouth side linear portions 92, 93, a loop-shaped end portion 94 provided at both ends of the upper mouth side linear portion 93, and the lower mouth side linear portion 92 and both end portions 94. The curved portion 95 is formed between the curved portions. Raw coil K
The end portions 94 at both ends of each of the lower end straight portions 92 are clamped by the end clamps C ₅ , and the both ends of the lower mouth side linear portion 92 are respectively clamped by the lower mouth side linear portion clamps C _6. While the portions of 93 corresponding to both ends of the lower mouth side linear portion 92 are clamped by the upper mouth side linear portion clamps C ₇ , respectively, two sets of the respective molding arms 96 are separated from each other. To move. Next, each straight part clamp tool C ₆ , C
₇ , with the fulcrum axis 98 as the center, outward at a predetermined angle α ₅ ,
Rotate by α ₆ to make an angle. Finally, the inside of the curved portion 95 of the hexagonal coil K ₂ is hammered from below with a hammer 99.
The curved portion 95 is formed by hitting. Therefore, the conventional coil forming device described above has the following problems. (1) The original coil is composed by aligning a number of strands regularly and taping the strands. Since there are multiple independent coil forming processes, the strands are loaded differently. As a result, the strands of the original coil are misaligned, and problems such as disconnection are likely to occur. (2) Since the curved part is molded by human hands, it takes a lot of time for molding and the shape is not constant. (3) When the coil is removed from the device after molding, spring back may occur and the shape of the coil may change. Therefore, it has to be corrected again.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional coil forming apparatus, and does not remove the coil once attached to the apparatus to the end, and also considers springback and the like. The object is to make it possible to perform molding automatically and at almost the same time with high accuracy.

[0005]

The present invention for solving this problem is an apparatus for forming a trapezoidal original coil into a hexagonal shape that can be inserted into a stator of a rotating electric machine by twisting and bending. A pair of forming arms arranged to face each other are rotatably supported in a vertical plane about a common horizontal fulcrum axis, and the phases of the straight portions of the upper coil side and the lower coil side of the original coil are aligned. Two linear part forming units, one pair each having a configuration in which each linear part clamp tool for clamping the corresponding part is mounted inside each of the forming arms so as to be movable along the longitudinal direction thereof, and An end clamp tool for clamping the end parts of both ends of the coil is installed inside the support post so that it can be moved up and down, and a pair of end part forming units, and a pair of left and right end parts for forming the curved part of the hexagonal coil. Equipped with a mold The pair of linear portion forming units are arranged in the central portion of the space at an interval corresponding to the length of the linear portion of the hexagonal coil to be formed, and the end clamps face each other. The pair of end portion molding units are disposed outside each linear portion molding unit, and the molding die is disposed between each linear portion molding unit and each end portion molding unit. With the pair of forming arms in an upright posture, the linear parts clamps attached to the parts clamp the corresponding parts of the linear parts of the original coil, and end the end parts of both ends of the original coil. In the state of being clamped by the respective end clamps of the section forming unit, the operation of tilting each pair of the two forming arms in a pair to the outside and By the operation of lowering pump device and the end clamp fixture, respectively, it is that which is adapted to automatically molded insertable hexagonal shaped coil in the stator of the rotating electric machine original coil trapezoidal.

[0006] The straight lines mounted on the pair of molding arms are set in a standing posture with the pair of molding arms forming the one-to-one pair of straight-line molding units arranged at the center of the base. The part clamp tool is positioned at the rising end, and the end clamp tool mounted inside the support column forming the end molding unit is positioned at the rising end. When the linear part clamps attached to the pair of forming arms are located at the rising ends, the one that clamps the straight part on the lower mouth side of the original coil is more than the one that clamps the upper mouth side. It is located above.

The trapezoidal original coil is provided with a straight-line clamp on each of the linear portions on the lower opening side and the upper opening side, which correspond to each other. When the end portions at both ends of the original coil are clamped together with the end clamps, the original coil is arranged substantially vertically. In this state, when the two pairs of forming arms, which are one-to-one, are tilted outward about the common horizontal fulcrum axis, the straight parts of the original coil located in the up-down direction are outwardly directed from each other. And bent by the tilting angle of each forming arm, and at the same time, the bent portions at both ends of the original coil are twisted to form a loop. Simultaneously with the tilting operation of the two pairs of forming arms, which are one-to-one, or by shifting a predetermined time, the former linear clamps and the respective end clamps are moved by the former more than the latter. When each of the coils is lowered by a set amount so as to be large, the inner portions of the curved portions at both ends of the original coil are pressed by the molding dies during the descent and are bent in accordance with the molding dies.

As a result, the curved portions are formed at both ends of the straight portions on the lower opening side and the upper opening side which are parallel to each other, and the loop portions are formed on the outer ends of the curved portions. Is molded, and each part of the coil whose overall shape is a hexagonal shape is molded almost at the same time.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples. 1 is a front view of a coil forming apparatus according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a side view thereof. FIG. 4 is a side view showing a state in which the original coil is attached to the coil forming device according to the present invention. FIG. 5 is a cross-sectional view taken along the line WW of FIG. 4, showing the configuration of the straight-line forming unit and the forming die base. FIG. 6 is a cross-sectional view taken along the line XX of FIG. 1, and is a view showing the configuration of the linear part clamp tool. FIG. 7 is a view on arrow A of FIG. FIG. 8 is a cross-sectional view taken along the line YY of FIG. 1, showing the configuration of the end clamp tool. FIG. 9 shows ZZ of FIG.
It is a line sectional view. FIG. 10 is a view on arrow B of FIG. 11 and 12 are a side view and a front view, respectively, showing a coil forming state by the coil forming apparatus according to the present invention.

As shown in FIG. 1, in the central portion of the basic base 1, two linear portion forming units U ₁ which are paired one by one are provided.
Are arranged at predetermined intervals along the longitudinal direction of the basic base 1, and a pair of end portion forming units U ₂ are arranged on both outer sides thereof. A pair of left and right curved portion forming dies U ₃ are attached to the outside of each linear portion forming unit U ₁ . Each straight line forming unit U ₁
Straight part forming base 2, pair of forming arms 3a, 3
b, horizontal fulcrum shaft 4, etc., as well as linear part clamps C ₁ , C ₂
It is configured by each end molding unit U ₂
Is composed of an end forming column 5 and an end clamp tool C ₃ . The trapezoidal original coil K has a straight portion clamp tool C ₁ disposed in each straight portion forming unit U ₁ with the lower mouth side straight portion 92 facing upward and the upper mouth side straight portion 93 facing downward. Each is clamped by C ₂ . Further, the respective end portions 94 at both ends of the original coil K are clamped by the end clamp tools C ₃ arranged in the respective end portion forming units U ₂ .

As shown in FIG. 2, a pair of guide rails 6 are provided at a predetermined interval on the basic base 1 to form a basic base 1.
Mounted in the longitudinal direction of the guide rails 6, one pair of end forming columns 5 is provided on the outside of the guide rails 6, and one pair of two linear forming bases 2 is provided on the inside of each end forming column 5. , Are arranged so as to be linearly movable. Further, two ball screws 8 and 9 are formed inside the pair of guide rails 6 via bearings 7 from the central portion to the opposite sides, and two ball screws 8 and 9 are provided in the longitudinal direction of the basic base 1. And a ball nut 11 mounted on the upper surface of each straight portion forming base 2 and each end forming column 5 respectively.
It is screwed with the ball nut 12 attached to the lower surface of the. The drive shafts 13 and _{1 of} the respective motors M ₁ and M ₂
Chains 15, 20 are mounted between the chain gears 15, 17 attached to the No. 4 and the chain gears 16, 18 attached to one end of the ball screws 8, 9, respectively. M ₁ , M ₂
Driving the respective ball screws 8, 9
Rotates in the normal and reverse directions, but since the ball screws 8 and 9 are composed of the normal screw and the reverse screw, a pair of straight part forming bases 2 are formed.
If a set of end shaping column 5, each motor - motor -M _1, M
_{When the two} drive, they move closer to each other or move away from each other by the same amount.

First, the straight line forming unit U ₁ will be described. As shown in FIG. 2 and FIG.
On the base 2, a lower mouth side forming arm 3a whose side surface has an inverted L-shape and an upper mouth side forming arm 3b whose side surface has an L shape are formed as a basic base 1. Two units are arranged in a vertical plane orthogonal to the longitudinal direction of. Regarding the longitudinal length of each of the forming arms 3a and 3b, the lower mouth side forming arm 3a that clamps the lower mouth side straight line portion 92 of the original coil K clamps the upper mouth side straight line portion 93. It is longer than the upper opening side molding arm 3b. As shown in FIGS. 4 and 5, guide plates 21 are vertically fixed to both sides of each straight part forming base 2, and a pair of forming arms are provided inside each guide plate 21.
The bases 10 of the frames 3a and 3b are orthogonal to the longitudinal direction thereof.
With a minute gap in the direction in which a and 10b face each other,
In addition, one base end portion 10b is arranged so as to enter the other base end portion 10a. Proximal end portions 10 of a pair of forming arms 3a, 3b arranged to face each other from one guide plate 21 of each straight portion forming base 2 to the other guide plate 21.
A horizontal fulcrum shaft 4 is provided so as to extend through a and 10b.
Hydraulic cylinders 22 are arranged below the forming arms 3a and 3b, respectively, with a distance that does not interfere with each other. The free ends 22b of the rods 22a are separated from the horizontal fulcrum shaft 4 by the horizontal fulcrum shaft 4. At a predetermined position separated outward, it is rotatably supported by a shaft 23 provided on the pair of molding arms 3a and 3b. The fixed end 22c of the rod 22a of each hydraulic cylinder 22 is rotatably held by a common fulcrum shaft 24 below the horizontal fulcrum shaft 4. Therefore, the pair of forming arms 3a and 3b are connected to the hydraulic cylinder-22.
By the operation of, each can independently tilt about the horizontal fulcrum shaft 4. Further, the base end portions 10a, 10b of the pair of forming arms 3a, 3b are arranged with a minute gap with respect to the guide plates 21 provided on both sides of each linear portion forming base 2. Therefore, when the forming arms 3a and 3b tilt about the horizontal fulcrum shaft 4, the forming arms 3a and 3b do not deviate from the vertical plane and tilt.

As shown in FIG. 4, each molding arm 3a, 3
A pair of guide rails 25 are attached to each of the guide rails 25b at predetermined intervals in the longitudinal direction of the molding arms 3a and 3b. 26 is mounted so as to be linearly movable in this direction. A ball screw 27 is attached to each of the forming arms 3a and 3b via a bearing 28.
The ball screws 29 are supported in the longitudinal direction of a and 3b, and the ball nuts 29 attached to the linear clamp bases 26 and the ball screws 27 are screwed together. Each board
The upper end of the screw 27 is formed on each of the forming arms 3a and 3a.
Projected from the upper end of b, chain gears 31 are attached to the respective parts, and motors M ₃ are attached to the opposite sides thereof. Chains 34 are respectively hung between the chain gear 32 attached to the drive shaft 33 of each motor M ₃ and the chain gear 31 attached to one end of the ball screw 27, and each chain 34 is attached. The respective ball screws 27 are rotated in the forward and reverse directions by driving the motor M ₃ . As a result, each straight part clamp base 26 has a pair of forming arms 3.
It moves up and down along the longitudinal direction of a and 3b.

[0014] forming A - The arm 3a, the lower port side linear section clamp fixture C ₁ is formed A - The arm 3b, which are equipped with Kamiguchi side straight portion clamp fixture C _2, to FIGS. 6 to 8 The linear part clamps C ₁ and C ₂ will be described in detail with reference to FIG.
The linear part clamps C ₁ and C ₂ have the same structure,
It is mainly composed of a straight part clamp base 26, a pressing tool 36, and a hydraulic cylinder 37. Comb-shaped teeth 38 are provided at the tip of the straight portion clamp base 26 perpendicularly to the bottom surface of the straight portion clamp base 26. Furthermore, above the straight part clamp base 26,
The mounting surface 26a inclined so that the inside is lowered is provided, and the bracket 40 having the guide groove 39 is
It is fixed vertically to the mounting surface 26a, and in this guide groove 39, a cylinder-holding tool 41 having a hydraulic cylinder-37 mounted on the rear side is mounted with a minute gap. Since the adjusting screw 42 is provided above the cylinder-holding tool 41 and is held by the handle 43 via the bracket 40, the cylinder-holding tool 41 can be rotated by turning the handle 43. It moves up and down along the guide groove 39. The pressing tool 36 is attached to the tip of the cylinder-rod 44 of the hydraulic cylinder 37. A plurality of comb-shaped teeth 45 are provided at the tip of the pressing tool 36. The teeth 45 of the pressing tool 36 are cut so as to form a rectangular space 46 when engaged with the teeth 38 provided at the tip of the linear clamp base 26. When the hydraulic cylinder-37 is operated, the pressing tool 36 descends in parallel to the mounting surface 26a. Comb teeth 45 at the tip of the pressing tool 36
Are alternately fitted into the gaps between the teeth 38 and the teeth 38, which are provided at the tip of the straight portion clamp base 26, and have teeth 38 of the straight portion clamp base 26 and the pressing tool 36.
The teeth 45 form a rectangular space 46 and stop.
The lower opening side linear portion 92 or the upper opening side linear portion 93 of the original coil K to be molded is set in the rectangular space portion 46. Further, the size of the rectangular space 46 can be changed by rotating the handle 43 to change the position of the cylinder-holding tool 41. Each of the linear part clamps C ₁ and C ₂ has the above-described structure, and is always arranged in a direction facing each other with respect to the pair of molding arms 3 a and 3 b.

Next, the end portion molding unit U ₂ will be described. As shown in FIGS. 1 and 3, a pair of guide rails 51 are attached to each end forming column 5 at predetermined intervals in the longitudinal direction of the end forming column 5, and these guide rails 51 are attached to each other. An end clamp base 52 is attached to each of the rails 51 so as to be linearly movable in that direction. A ball screw 53 is supported on each end forming column 5 through a bearing 54 in the longitudinal direction of the end forming column 5, and each ball nut attached to each end clamp base 52. 55
And the ball screw 53 are screwed together. As shown in FIG. 3, the upper end of each ball screw 53 protrudes from the upper end of each end forming column 5, and a chain gear 58 is attached to this part, and on the opposite side thereof,
Each mode - are data -M ₄ is attached. Chain gear 58 attached to the drive shaft 59 of each motor M ₄ and chain gear 57 attached to one end of the ball screw 53.
Each chain 60 is hung between each motor - driven by the motor -M _4, each of the ball - ball screw 53 is rotated normally and reversely. As a result, each end clamp base 52 moves up and down along the longitudinal direction of each end molding column 5.

As shown in FIG. 1, each end forming column 5
Each has an end clamp tool C ₃ ,
The end clamp tool C ₃ will be described in detail with reference to FIGS. 1, 8, 9, and 10. Each end clamp tool C ₃
Mainly end clamp base 52, fulcrum shaft 62, rotary shaft 6
3, a pressing tool 64, and a hydraulic cylinder-65. A fulcrum shaft 62 is supported by a bearing 66 on the end clamp base 52. A rod 69 of a pneumatic cylinder-68 is attached to one end of the fulcrum shaft 62 via a bracket 67, and a coil holder 70 is attached to the other end thereof via a rotary shaft 63. The fulcrum shaft 62 is movable in the longitudinal direction P of the basic base 1 by operating the pneumatic cylinder 68. The coil holder 70 can be rotated by a bearing 71 attached to one end of the rotating shaft 63, but a stop 72 is attached to the rotating shaft 63.
But also a cap 62a fixed to one end of the fulcrum shaft 62
Since the two stop pins 73 are provided in the coil holder 70, the coil holder 70 can be rotated within the range of the angle β formed by the two stop pins 73 of the rotary shaft 63, as shown in FIG. 9. is there. A hydraulic cylinder-65 is fixed to the coil holder 70, and a pressing tool 64 is attached to the tip of a rod 65a of the hydraulic cylinder-65. Further, in the coil holder 70, the support rod 74 has the pressing surface 6 of the pressing member 64.
It is arranged perpendicular to 4a. Hydraulic cylinder-6
When 5 is operated, the pressing tool 64 moves along the inner side surface of the coil holding tool 70 while being guided by the support rod 74 from the middle, and the pressing tool 64 contacts the coil holding tool 70 and stops. Each of the end clamp tools C ₃ has the above-described structure, and for the pair of end forming columns 5,
It is always arranged to face each other.

Next, the curved portion forming die U ₃ will be described. As shown in FIG. 1, a pair of left and right curved portion forming dies U ₃ are arranged outside each straight portion forming base 2 and inside each end forming column 5. Each curved portion forming die U ₃ mainly includes a forming die base 76, a forming plate holder 77,
It is composed of a molding plate 78. Each mold base 7
As shown in FIG. 5, 6 is arranged on a pair of guide rails 6 of the basic base 1 and on a guide 79 mounted in the width direction of the basic base 1. Forming base for each straight line 2
Two guide grooves 80 are provided on the outer side surface of the guide plate 21 perpendicular to the horizontal plane of the basic base 1, and the end surfaces of the respective molding bases 76 are respectively arranged in the guide grooves 80. It is installed with a small gap. for that reason,
Each forming die base 76 has its own straight portion forming base 2.
Along with the movement of, the linear portion forming base 2 and the linear portion are moved. As shown in FIG. 1, the other end of each mold base 76 is held by an adjusting screw 81 provided vertically between each mold base 76 and each guide 79.
By turning the handle 82 attached to the bottom surface of each molding die base 76, each molding die base 76 moves up and down along the respective guide grooves 80. Each mold base 76
On the side of the straight part forming base 2 on the upper surface of the forming base 76
The forming plate holders 77 are attached vertically to the respective plate holders, and the adjusting screws 83 are provided vertically to the forming plate holders 77. Through these adjusting screws 83, a plurality of molding plates 78 having a long hole 84 in the central vertical direction and having different heights are passed,
The adjusting screw 83 is tightened and fixed by the handle 85. The height of each molding plate 78 can be adjusted by moving the molding plate 78 up and down along the elongated hole 84 and then tightening the handle 85.

Next, a coil forming operation by the coil forming apparatus will be described with reference to FIGS. 1, 4, and 8 to 12. First, depending on the length and shape of the straight portion of the original coil K to be molded, the positions of the two straight portion forming units U ₁ forming a one-to-one pair and the one-to-one pair of end portion forming units U ₂
Position, the respective positions in the height direction of the linear part clamp tools C ₁ and C ₂ and the end clamp tool C ₃ , and the respective moldings of the two curved part molding dies U ₃ which are paired left and right. Adjust the arrangement of the plates 78. The pneumatic cylinder-68 constituting each end clamp tool C ₃ is released so that each rod 69 can freely move.

As shown in FIG. 4, the pair of forming arms 3a and 3b forming each straight-line forming unit U ₁ are set in an upright posture, and the trapezoidal original coil K is connected to the straight line on the lower opening side having a short length. With the portion 92 standing up, the lower mouth side linear portion 92 is arranged on the comb-teeth-shaped teeth 45 at the tips of the two sets of linear portion clamp bases 26. In this state, when the hydraulic cylinder-37 of the lower mouth side linear part clamp tool C ₁ is operated, each pressing tool 36 descends, and the lower mouth side linear part 92 of the original coil K is firmly clamped. Similarly, the upper mouth side linear portion 93 at a position corresponding to the lower mouth side linear portion 92 of the original coil K is also firmly clamped. In the state where the original coil K is initially set, the lower mouth side linear portion clamp tool C ₁ that clamps the lower mouth side linear portion 92 of the original coil K is the upper mouth side linear portion that clamps the upper mouth side linear portion 93. It is located above the clamp tool C ₂ . Then, FIG. 8 and FIG.
As shown in 0, the end portions 94 at both ends of the original coil K are
It is inserted between the support rod 74 and the pressing tool 64 that constitute each end clamp tool C ₃ , and the loop-shaped end portions 94 of the original coil K are held in a state of being respectively wound around the support bar 74. When the hydraulic cylinder-65 is operated by
Is moved, and both end portions 94 of the original coil K are pushed by the pressing tool 64.
It is firmly clamped by the coil holder 70.
Further, since the respective end portions 94 are wound around the support rod 74, respectively, even if the end portions 94 of the coil are pulled inward during molding, the coil does not come off the end clamp tool C ₃ . By the above operation, the original coil K is set almost vertically to the device.

In this state, as shown in FIG. 11, the two pairs of forming arms 3a and 3b, which are in a one-to-one pair, are rotated at predetermined angles α ₁ and α about the common horizontal fulcrum shaft 4. _When it is tilted outwardly by _{2, the} straight portions 92 and 93 of the original coil K, which were located in the up-down direction, are opened outwardly to form a hexagonal shape. In FIG. 11, the coil K ₁ which is being outwardly opened and has a hexagonal shape is shown by a chain double-dashed line. At the same time, the straight portions 92, 93 of the original coil K are twisted outward by the tilt angles α ₁ , α _{2 of the} forming arms 3a, 3b. That is, angulation is performed simultaneously. As shown in FIG. 12, since the coil K ₁ being formed is expanded outward, a force pulling inward acts on each end portion 94 of the original coil K, but the empty space of each end clamp tool C ₃ is preliminarily obtained. since the pressure cylinders -68 is released, the fulcrum shaft 62 constitute a pair of end clamp fixture C ₃ is moved inward with the molding of the coil. Further, since the coil K ₁ being formed receives a torsional force, the rotary shaft 63 constituting each end clamp tool C ₃ tries to rotate in the direction in which the coil is torsionally formed. However, as shown in FIGS. 8 and 9, each rotating shaft 63 is provided with a stop 72, and the stop pin 7 is provided at a predetermined angle with respect to the stop 72.
3 is provided, each rotary shaft 63 has a stop pin 73.
The coil ends 94 are formed by a predetermined angle.

[0021] These molding A - arm 3a, 3b tilt operation and at the same time, or by shifting a predetermined time, each of the mode - Start data -M _3, M _4, each straight line portions clamp fixture C _1, When C ₂ and each end clamp tool C ₃ are lowered by a set amount, as shown in FIGS. 11 and 12, the inner portions of the curved portions 95 at both ends of the coil K _{1 being} formed are being lowered. In each of the curved part forming mold U ₃
It is pressed by the plurality of molding plates 78 arranged in, and is bent and shaped according to the shape of the molding plates 78. In FIG. 11, at the same time as the tilting operation of each of the forming arms 3a and 3b, or by shifting a predetermined time, each linear part clamp tool C ₁ ,
The coil K ₂ in the final shape formed by lowering C ₂ and each end clamp tool C ₃ by a set amount is shown by a solid line. Further, the center of rotation of the tilting operation of each forming arm 3a, 3b is the center of the horizontal fulcrum shaft 4 common to the pair of forming arms 3a, 3b. This center is made to coincide with the center point of the rotating electric machine 87 to which the coil K ₂ is attached, and the coil K ₂
Mounting radius R _{1 of} the rotating electric machine 87 to which ₂ is mounted,
If R ₂ and the mounting angle θ (θ = α ₁ + α ₂ ) are set in advance and the linear part clamp tools C ₁ and C ₂ and the end clamp tools C ₃ are respectively lowered by a set amount, A coil shape K ₂ matching the stator of the rotating electric machine 87 is obtained. When removing the molded coil K ₂ from this device,
When there is a possibility that spring back will occur and the shape of the coil K ₂ will change, it is sufficient to tilt each forming arm 3a, 3b by an angle that allows for spring back in advance.
It is possible to easily deal with changes in shape after molding. Finished coil forming, After removing the molded coil K _2, each forming A - arm 3a, again returned to the upright posture 3b, by actuating the pneumatic cylinder -68 of each end clamp fixture C _3,
It is sufficient to return each fulcrum shaft 62 to the initial position.

The position of each straight-line forming unit U ₁ , the tilting angles of the forming arms 3a and 3b constituting the straight-line forming unit U ₁ , the position of each end forming unit U ₂ , the straight-line clamps C ₁ , C ₂ and each end. moving end position of the clamping device C ₃ (lowered end position), the size of the space 46 of the original coil K to be clamped, the axis of rotation of each end clamp fixture C ₃ 6
Since the rotation angle β of 3 and the height, position, and shape of each forming plate 78 can all be changed, the above respective amounts are set in accordance with the size of the original coil K to be formed and the shape of the curved portion 95. By changing the size, it is possible to form several types of hexagonal coils having different sizes and shapes with one device.

[0023]

As described above, when the hexagonal coil is formed by using the coil forming apparatus according to the present invention, the forming is completed in one step without removing the coil from the apparatus during forming. Further, it is possible to perform the molding in consideration of deformation such as springback. Therefore, the load applied to the wires forming the coil is small, and the coil after molding does not have a problem such as disconnection. Furthermore, since the coil formed by the present coil forming device matches the attachment radius and the attachment angle of the rotating electric machine to which the coil is attached, the attaching work to the rotating electric machine is also good.

[Simple description of drawing]

FIG. 1 is a front view of a coil forming device according to the present invention.

FIG. 2 is a plan view of the same coil forming device.

FIG. 3 is a side view of the same coil forming device.

FIG. 4 is a side view of the coil forming device of the present invention, showing a state in which an original coil is attached to the coil forming device.

5 is a cross-sectional view taken along the line WW of FIG. 4, showing the configurations of the linear part forming unit and the forming die base.

FIG. 6 is a cross-sectional view taken along line XX of FIG. 1, showing the configuration of a linear portion clamp tool.

7 is a view as viewed in the direction of the arrow A in FIG. 6;

8 is a cross-sectional view taken along the line YY of FIG. 1, showing the configuration of the end clamp tool.

9 is a sectional view taken along line ZZ of FIG.

10 is a view on arrow B of FIG.

FIG. 11 is a side view showing the behavior of a coil when the coil is molded using the coil molding device according to the present invention.

FIG. 12 is a front view showing the behavior of the coil when the coil is molded using the coil molding apparatus according to the present invention.

FIG. 13 is a front view of a conventional coil forming device.

14 is a view showing a coil forming method by a conventional coil forming apparatus, and is a cross-sectional view taken along line VV of FIG.

FIG. 15 is a diagram showing a coil forming method by a conventional coil forming apparatus.

FIG. 16 is a perspective view showing a method for correcting a coil after the coil is formed by a conventional coil forming device.

[Explanation of symbols]

U ₁ : Straight part forming unit U ₂ : End part forming unit U ₃ : Curved part forming mold C ₁ : Lower mouth side linear part clamp tool C ₂ : Upper mouth side straight part clamp tool C ₃ : End clamp tool K: Original Coil K ₂ : Tortoiseshell-shaped coil 3 a: Lower opening side forming arm 3 b: Upper opening side forming arm 4: Horizontal fulcrum shaft 5: End forming column 87: Rotating electric machine 92: Lower opening side linear portion 93: Upper opening Side straight part 94: End part 95: Curved part

Claims (2)

[Claims] 1. A device for forming a trapezoidal original coil into a hexagonal shape that can be inserted into a stator of a rotating electric machine by twisting and bending, wherein a pair of forming arms arranged opposite to each other is common. The linear part clamps, which are rotatably supported in a vertical plane about a horizontal fulcrum axis, for clamping the corresponding parts of the linear parts on the upper opening side and the lower opening side of the original coil, are described above. Two linear part forming units, one pair each configured to be movable in the longitudinal direction inside each forming arm, and end clamps for clamping the end parts of both ends of the original coil. It is equipped with a pair of end part forming units mounted inside the pillar so as to be able to move up and down, and a pair of left and right forming dies for forming the curved part of the hexagonal coil, and the pair of straight lines at the center of the base. Part molding unit The pair of end portion forming units are arranged at intervals corresponding to the length of the straight portion of the hexagonal coil to be formed, and the pair of end portion forming units are arranged so that the end clamp tools face each other. The molding die is disposed outside, and the molding die is disposed between each linear portion molding unit and each end portion molding unit. In the state where the corresponding linear parts of the original coil are clamped by the attached linear part clamps, respectively, and the end parts of both ends of the original coil are clamped by the end clamps of the end forming unit, respectively. , The operation of tilting each of the two forming arms in a one-to-one pair to the outside, and lowering each of the linear part clamp tools and the end clamp tools, respectively. By the operation to, molding apparatus hexagonal shaped coil, characterized by automatically forming the source coil trapezoidal shape insertable hexagonal shaped coil in the stator of the rotary electric machine. 2. The distance between the pair of linear portion forming units and the pair of end portion forming units is adjustable according to the size of the original coil. Forming device for the hexagonal coil described in.