JPH05244755A - Coil forming device - Google Patents

Abstract

PURPOSE:To form a coil in a circular arc shape after forming the coil in a hexagonal shape by providing a supporting block and cylinder which support and guide clampers so that the clampers can be rotated in the form of a circular arc in the up-down and front-rear directions from the clamping position of a coil and another cylinder which moves the supporting block in the up-down and front-rear directions. CONSTITUTION:A coil 1 is supported by grasping the upper and lower linear sections of the coil 1 by means of a first and a second clampers 11 and 17 and fitting a left and right support metallic fixtures 22 to semicircular sections at both ends of the coil 1. Then the coil 1 is opened by actuating a cylinder 21 and moving a second supporting block 18 forward, and, at the same time, the clampers 11 and 17 are made to grasp the linear sections of the coil 1 by actuating cylinders 13 and 19, sliding the clampers 11 and 17 in the opposite directions. When the linear sections of the coil 1 are grasped, the fixtures 22 move to arbitrary positions on guide rails 23 following the opening motion of the coil 1. Then the heights of the left and right linear sections of the coil 1 are corrected by actuating a cylinder 6 and lowering a first supporting block 12 and the clampers 11 so that the upper linear section of the coil 1 can be moved downward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil forming apparatus mounted on, for example, a stationary portion and a rotor of an electric motor.

[0002]

2. Description of the Related Art FIG. 4 is a plan view showing a conventional coil forming apparatus, and FIG. 5 is a sectional view of a coil formed by the conventional coil forming apparatus. In the figure, 1 is a coil, 2a and 2b are coils 1. The grips 3a and 3b for gripping the straight portion are clampers for clamping the coil 1, and the grips 2a and 2b are
Is installed. Reference numeral 4 is a guide for moving the clampers 3a, 3b in parallel, 5a, 5b are cylinders for moving the clampers 3a, 3b, 6a, 6b are a pair of holding metal fittings for holding the semicircular portions at both ends of the coil 1, 7
Reference numerals a and 7b are guides for moving the holding metal fittings 6a and 6b to the left and right, respectively, and 8 is a base for supporting the guides 4, 7a and 7b and the cylinders 5a and 5b. 6 is a perspective view showing the coil 1 before forming the hexagonal shape, FIG. 7 is a perspective view showing an example of the formed coil 1, and FIG. 8 is a sectional view taken along line YY in FIG.

Next, the operation will be described. Cylinder 5
The clamper 3 is moved by the feeding operation of the rods a and 5b.
The a and 3b move forward, and the metal fittings 2a and 2b are vertically overlapped on the center lines of the holding metal fittings 6a and 6b.
In this state, the clampers 3a and 3b are opened, and the coil 1 is set so that the straight portions face up and down.
3b is closed and the coil 1 is fixed. Next, the holding metal fittings 6a and 6b are attached to the semicircular portions at both ends of the coil 1, respectively. Next, when the clampers 3a and 3b are retracted by retracting the cylinders 5a and 5b and the coil 1 is opened, the holding metal fittings 6a and 6b follow each other and move inward, so that the coil 1 becomes a hexagonal shape. As shown in FIG. 6, the cross-sectional shape of the coil 1 at this stage is such that the vertically facing wires are straight lines. Therefore, in order to form an arc shape as shown in FIG. 9, the coil 1 is removed from the apparatus and the arc forming die is used. It is molded by hammering, etc.

[0004]

Since the conventional coil forming device is constructed as described above, in order to make the hexagonal shaped coil into an arc shape, the coil is removed from the device and then another coil is formed. There is a problem that secondary molding must be performed using a molding die or the like.

The present invention has been made in order to solve the above problems, and provides a coil forming device capable of forming a hexagonal shape by opening a coil and continuously forming an arc shape by the same device. The purpose is to get.

[0006]

SUMMARY OF THE INVENTION A coil forming apparatus according to the present invention is a first clamper for gripping an upper linear portion of a coil, and an upper and lower circular arc shape centering on a clamp position of the coil which supports the first clamper. A support block and an operating cylinder that guide the support block to rotate, a frame and an operating cylinder that guide and support the support block to slide up and down, a second clamper that holds the lower linear portion of the coil,
A support block and an operating cylinder that supports the second clamper and guides it to rotate back and forth in an arc shape about the clamp position of the coil, a cylinder that moves the support block forward and backward, and a semicircular portion at both ends of the coil. It is provided with a pair of support fittings that follow the movement during coil forming.

[0007]

In the coil forming device according to the present invention, the first and second clampers grip the upper and lower straight portions of the coil, and the second clamper is moved forward together with the second support block to open the coil. In the process, the coil is twist-formed by rotating the first and second clampers in a predetermined direction. Further, by lowering the first clamper together with the first support block, the upper linear portion of the coil is pushed down, and the height difference between the left and right linear portions of the coil is corrected.

[0008]

EXAMPLES Example 1. An embodiment of the present invention will be described below with reference to FIG.
2 and 3 will be described. In FIGS. 1, 2, and 3, reference numeral 11 denotes a first clamper for gripping the upper linear portion of the coil 1, which has a metal plate 2a on the fixed side and a metal plate 2b on the movable side. Then, the aforesaid dowel 2a of the first clamper 11 is tightened and released by operating the lever,
Further, the money 2b can be opened and closed with its base as a fulcrum. Reference numeral 12 is a first support block for supporting the first clamper 11, and arc-shaped guides 12a are provided on both sides of the front surface of the first clamper 11, and projections 11a on both rear sides of the first clamper 11 are fitted to the guides 12a. The first clamper 11 with the first clamp position as the center.
It is slidably supported in the circumferential direction. Thirteen
Is a cylinder, which is provided on the first support block 12 and has its rod tip end connected to the rear end of the first clamper 11. 14 is a frame, which is a pedestal 8 on the base 8.
It is mounted and fixed on a. Reference numeral 15 is a guide rail provided on the front surface of the frame 14, to which a sliding piece 12b provided at the rear end of the first support block 12 is slidably fitted. Are supported so as to move vertically with the first clamper 11. Reference numeral 16 is a cylinder, which is attached to the frame 14 and has its rod tip connected to a connecting fitting 12c protruding from the first support block 12 toward the frame 14. Reference numeral 17 is a second clamper for gripping the lower straight part of the coil 1, and has a fixed plate 2a attached to the fixed side and a movable plate 2b attached to the movable side. It is similar to that provided in the first clamper 11. 1
Reference numeral 8 is a second support block that supports the second clamper 17, and arc-shaped guides 18a are provided on both sides of the upper surface of the second support block.
The ridges 17 on both sides of the lower part of the second clamper 17 are
a is fitted and the second clamper 17 is slidably supported in the circumferential direction along the guide 18a around the clamp position of the coil 1. 19 is a cylinder,
The rod is provided on the second support block 18, and the tip of the rod is connected to the second clamper 17. Two
Reference numeral 0 is a guide rail, which is provided on a pedestal 8a on the base 8 and a sliding piece 18b provided on the second support block 18 is slidably fitted to the guide rail 8a. Is supported so as to slide in the front-rear horizontal direction together with the clamper 17. 21 is a cylinder,
The rod tip is attached to the frame 14 and is connected to the second support block 18. Reference numeral 22 is a support metal fitting for supporting the semicircular portions at both ends of the coil 1, which are arranged on the left and right. Reference numeral 23 denotes a guide rail arranged in parallel on a mounting plate 24, on which a slide base 22a having the support metal fittings 22 attached is mounted, and the left and right support metal fittings 22 are respectively supported slidably in the front-rear direction. 25 is a guide rail for mounting and supporting the mounting plate 24,
The mounting plates 24 are slidably supported in the left and right directions, respectively.

Next, the operation will be described. First, the rod of the cylinder 21 is retracted, the second support block 18 is retracted, and the first clamper 11 and the second clamper 17 are placed in a state in which the metal fittings 2a and 2b are vertically overlapped. When the two clampers 11 and 17 are opened and the coil 1 is set, both clampers are closed to grip the upper and lower linear portions of the coil 1. Next, the left and right support fittings 22 are attached to and supported by the semicircular portions at both ends of the coil 1. Then, the rod of the cylinder 21 is sent out, and the second
Of the first clamper 1 by moving the support block 18 of the
1 is slid in the direction of arrow B in FIG. 3, and the second clamper 17 is slid in the direction of arrow C to twist the straight portion of the coil 1. At this time, the support fittings 22 on the left and right sides follow the opening operation of the coil 1 and move to arbitrary positions. Next, the cylinder 16 is operated to lower the first support block 12 together with the first clamper 11, lower the upper linear portion of the coil 1, and correct the height difference between the left and right linear portions of the coil 1. Molding is completed. When forming a parallel coil by the apparatus of the present invention, only the operation of opening the coil 1 needs to be performed.

In the above embodiment, the case where the opening operation and the twisting operation of the coil 1 are performed at the same time has been described. However, these two operations may be performed separately, and the cylinder mechanism is used as the power in the above embodiment. However, a mechanism in which other power, for example, a rack driven by a motor, a pinion, a screw, or the like is combined can be adopted, and the same effect can be obtained.

[0011]

As described above, according to the present invention, the first clamper for gripping the upper linear portion of the coil, and the first clamper for supporting the first clamper to guide the coil to rotate in an up-and-down circular arc shape. Supporting block and operating cylinder, a frame fixed on the pedestal for guiding and supporting the first supporting block to slide up and down, a second clamper for holding the lower linear portion of the coil, and A second support block and a working cylinder that supports and guides the second clamper to rotate back and forth in an arc shape, a cylinder that moves the second support block forward and backward, and a second cylinder that supports both ends of a coil. Since a pair of support fittings that follow the coil opening operation in the forward movement of the support block of No. 2 are provided, this device allows the linear portions of the coil to be opened in parallel at an arbitrary width, and It is possible to continuously perform the operation of twisting the wire portion around each clamp position and the height correction operation of the left and right straight portions of the coil, which enables easy and accurate molding and shortens the molding time. effective.

[Brief description of drawings]

FIG. 1 is a plan view of a coil forming device according to an embodiment of the present invention.

FIG. 2 is a front view of a coil forming device according to an embodiment of the present invention.

3 is a vertical cross-sectional side view taken along line XX in FIG.

FIG. 4 is a plan view showing a conventional coil forming device.

FIG. 5 is a cross-sectional view of a hexagonal coil formed by a conventional coil forming device.

FIG. 6 is a perspective view showing a state of a coil before molding.

FIG. 7 is a perspective view showing an example of a hexagonal coil attached to a stationary portion of an electric motor.

8 is a cross-sectional view of the coil taken along line YY in FIG.

[Explanation of symbols]

 1 Coil 2a, 2b Gold 11 First clamper 12 First support block 13 Cylinder 14 Frame 16 Cylinder 17 Second clamper 18 Second support block 19 Cylinder 21 Cylinder 22 Support bracket

Claims (1)

[Claims] 1. A device for forming an elliptical ring-shaped coil having a straight longitudinal direction into a hexagonal shape, a first clamper for gripping an upper linear portion of the coil, and a coil for supporting the first clamper. A first support block and an operating cylinder for guiding to rotate in an up-and-down arc shape around a clamp position, and a frame and an operating cylinder fixed to a pedestal for guiding and supporting the first supporting block to slide vertically. A second clamper for gripping the lower linear portion of the coil, a second support block for supporting the second clamper and guiding it to rotate in a front-back circular arc around the clamp position of the coil, A cylinder for moving the second support block forward and backward, and a pair of support fittings for supporting the semicircular portions at both ends of the coil and following the movement of the coil during molding are provided. Characteristic coil forming device.