JP5586498B2 - Terminal manufacturing method, manufacturing apparatus, and terminal - Google Patents

Description

The present invention relates to a manufacturing method and a manufacturing apparatus and terminal pins to manufacture a terminal of a predetermined shape by bending a wire having a rectangular cross-section.

  A square wire terminal used for a stator of an electric motor, for example, a flat wire terminal is manufactured by a manufacturing apparatus as disclosed in Patent Document 1, for example. This manufacturing apparatus includes a feed mechanism that continuously feeds a coated conductor whose outer periphery is coated with a plastic insulating layer, and a transition terminal provided with a required length at the end of the coated conductor that is fed by the feed mechanism. The first bending mechanism that bends the portion in the same plane in a Z-shape and the surface formed by the Z-shaped portion between the two corner portions of the Z-shaped portion of the coated conductor bent in the Z-shape are orthogonal to each other. A second bending mechanism that bends in the direction, a cutter mechanism that cuts the end of the coated conductor when it is fed to the required length, and a portion after the bent portion at the tip of the coated conductor is wound around the outer periphery of the reel A coil winding machine for forming a coil body, a binder spraying machine for spraying a binder for bonding the layers of the plastic insulating layer to the coil body supported by the coil winding machine, and a coil supported by the coil winding machine Hot air that blows hot air on the body And with machines, and a third bending mechanism to form a bending the coated conductive wire end of the coil body pins.

  In addition, the flat wire is bent by approximately 90 ° with respect to one terminal portion, and then bent at a predetermined position by approximately 180 ° to form a folded portion, and the other terminal portion is approximately opposite to the one terminal portion. A device that forms a rectangular wire terminal by bending by 90 ° is also disclosed (for example, see Patent Document 2).

JP-A-61-199443 JP 2009-254203 A

  In the prior art such as Patent Document 1, when a square line is bent into a Z-shape, the square line is held by a feed mechanism with reference to the tip of the square line. Therefore, it is necessary to bend in order from the bending of the front end side of the square wire, and there is a problem that it takes time and the processing cost is high.

  In addition, since the bending mechanism that bends the square wire into a Z shape and the bending mechanism that bends the coil into a coil shape to form the terminal portion are at different locations of the line, it is necessary to move the square wire, which takes time, There is a problem that the processing cost is high.

  Further, Patent Document 2 does not specifically disclose an apparatus for manufacturing a square wire terminal. Such a rectangular wire terminal can be manufactured by using a wire forming machine. However, the wire forming machine is a large and expensive machine and has a demerit that requires a large installation space.

The present invention has been made to solve the above-described problems, and provides a manufacturing method and a manufacturing apparatus capable of manufacturing a terminal that can simplify processing, reduce processing cost, and have stable quality. For the purpose.

The terminal manufacturing method of the present invention is a method of manufacturing a terminal having a predetermined shape by bending a square wire, and after cutting the square wire to a predetermined length , one end of the cut square wire is formed. By simultaneously moving one bending block that bends in one direction and the other bending block that bends the other end of the cut square line in a direction opposite to the one direction in directions opposite to each other on the base surface Bending the ends of both sides approximately 90 ° with the central portion of the cut square line fixed, and bending the cut square line into a Z shape within the same plane; Forming a terminal by bending the central part of the molded product into a U-shape by pushing it into a long hole having a depth direction perpendicular to the base surface with a bending plate .

In addition, the terminal manufacturing apparatus according to the present invention is an apparatus for manufacturing a terminal having a predetermined shape by bending a square wire.
A base having a groove-like guide into which the square line is inserted, a slot provided in a direction orthogonal to the guide, and a convex square holding part provided with the guide and the slot;
A holding block for fixing the central portion of the square line;
Simultaneously move in opposite directions on the base, bend the free ends on both sides of the cut square line cut to a predetermined length by about 90 °, and cut the square line in the same plane to Z Two bending blocks that bend in a shape,
A bending plate for pushing the square line bent into the Z shape into the elongated hole and bending it into a U shape;
It is equipped with.

  By configuring as described above, the square line after cutting by two bending blocks is simultaneously bent in the same plane to be formed into a Z shape, and then the Z-shaped molded product is pushed into the long hole with a bending plate. Since it is bent in a U shape, there is an effect that processing time can be shortened and processing cost can be reduced.

It is a perspective view which shows schematic structure of the square wire terminal manufacturing apparatus which concerns on embodiment of this invention. It is a figure which shows the state which set the square wire to the base of the square wire terminal manufacturing apparatus. It is a figure which shows the state which cut | disconnected the square line. (A) is the elements on larger scale which show the state which bent the both ends of the square line in Z shape, (b) is a figure which shows the Z-shaped primary molded product. It is a figure which shows the state which bent the square line in the U shape. It is a figure which shows a square wire terminal. It is a figure which shows the manufacturing process of a square wire terminal.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing a schematic configuration of a rectangular terminal manufacturing apparatus 100 according to an embodiment of the present invention.
As shown in FIG. 1, the square terminal manufacturing apparatus 100 is configured to bend a square 1 after cutting into a base 1, a holding block 2 for fixing a square wire (a wire having a square cross section), and a square shape after cutting. The bending blocks 3 and 4, the bending plate 5 for bending the Z-shaped square line into a U-shape, a cutting mechanism for cutting the square line (not shown), and sending the square line A feeding mechanism.

The base 1 is formed in a quadrangular shape, and a square line holding portion 1a formed by a flat convex portion having a step is provided in the central portion of the upper surface thereof. In this square wire holding portion 1a, a groove-like guide 1b for inserting and setting the supplied square wire 10, and a long hole 1c provided so as to penetrate the base 1 in a direction perpendicular to the guide 1b, A bending guide 1d provided with a chamfer is formed in the substantially central portion of the long hole 1c.
The step of the rectangular wire holding portion 1 a, that is, the depth of the guide 1 b is formed slightly smaller than the thickness of the rectangular wire 10. For example, when the square wire 10 is a flat wire having a cross-sectional dimension of 0.5 mm in thickness and 1.5 mm in width, the depth of the guide 1b corresponds to the cross-sectional thickness of the flat wire, and the width of the guide 1b is a flat wire. It is formed so as to correspond to the cross-sectional width.

  As shown in FIG. 2, the pressing block 2 is for pressing and fixing the square line 10 set on the guide 1 b to the base 1 from above. A slit 2 a is formed in the holding block 2. A bending plate 5 described later is inserted into the long hole 1c through the slit 2a.

The two bending blocks 3 and 4 are each formed of a square block, and are provided on the lower lower surface on both sides of the square holding portion 1a so as to simultaneously move on the base 1 in opposite directions. . On the lower surface (sliding surface) of one bending block 3, a 90 ° bending guide 3a that is continuous in an L shape is formed on the front portion in the moving direction and on the side portion that faces the step portion of the rectangular wire holding portion 1a. Has been. Similarly, an L-shaped continuous 90 ° bending guide 4 a is also formed on the lower surface (sliding surface) of the other bending block 4.
As for the height (depth) and width of the 90 ° bending guides 3a and 4a, the height (depth) is slightly larger than the thickness of the square wire 10 and the width is slightly smaller than the width of the square wire 10. .
Further, appropriate corners (R) are attached to corner portions of the guide 1b, particularly corner portions 1e and 1f on the side opposite to the moving direction of the bending blocks 3 and 4 that serve as fulcrums for bending the square wire. .
By simultaneously moving the bending blocks 3 and 4 in opposite directions, as shown in FIG. 4, both end portions of the square wire 10a after cutting are bent approximately 90 ° in the same plane and bent into a Z shape. Can do.

  A method of manufacturing a rectangular wire terminal using the rectangular wire terminal manufacturing apparatus 100 configured as described above will be described with reference to FIGS. 2 to 5 and 7.

First, as shown in FIG. 2, the square wire 10 is sent out by a feed mechanism (not shown), passed through the guide 1b of the base 1 to a predetermined length (step S1 in FIG. 7).
Next, as shown in FIG. 3, the pressing block 2 is lowered by a pneumatic cylinder or the like (not shown), and the central portion of the square wire 10 is pressed against the base 1 and fixed.
Next, as shown in FIG. 3, the square wire 10 is cut into a predetermined length by a cutting mechanism (not shown). At the time of cutting, cutting is performed so that the cut surface is inclined with respect to the axis of the square line 10 (step S2 in FIG. 7). As a result, the tip is formed in a sharp shape, and the cut corner wire 10a is formed such that one of the end portions is the insulating insertion portion 10b and the other is the substrate insertion portion 10c.

  Next, as shown in FIG. 4A, the two bending blocks 3 and 4 are illustrated in directions opposite to each other (directions of arrows A and B) in a state where the cut square wire 10 a is pressed by the pressing block 2. Do not move at the same time with a pneumatic cylinder. As a result, the horizontal portions of the L-shaped 90 ° bending guides 3a and 4a formed on the lower surfaces (sliding surfaces) of the respective bending blocks 3 and 4 are arranged in front and rear of the post-cut square line 10a to which the central portion is fixed. The end portions (free end portions 10d and 10e) are pushed to the opposite sides, and the free end portions 10d and 10e are bent with the corner portions 1e and 1f of the guide 1b as fulcrums. As the bending blocks 3 and 4 move forward, the free end portions 10d and 10e gradually increase in bending angle. Finally, the free end portions 10d and 10e have L-shaped 90 ° bending guides 3a, It is sandwiched between the vertical portion of 4a and the step portion of the square line holding portion 1a, and each is bent to approximately 90 ° (step S3 in FIG. 7). Thus, the cut corner line 10a is bent in a Z shape within the same plane. That is, a Z-shaped primary molded product 10B as shown in FIG. 4B is produced.

  When the Z-shaped bending of the cut corner line 10a is thus completed, the bending blocks 3 and 4 are retracted to the original position, and the holding block 2 is raised to the original position (step S4 in FIG. 7).

Next, as shown in FIG. 5, the bending plate 5 is guided by the slit 2a of the holding block 2 by a pneumatic cylinder or the like (not shown) and descends in the direction of arrow C. As a result, the bent plate 5 pushes the central portion of the Z-shaped portion of the primary molded product 10 </ b> B and pushes the primary molded product 10 </ b> B into the long hole 1 c of the base 1. Therefore, since the primary molded product 10B is sandwiched between the folding plate 5 and the elongated hole 1c, a U-shaped folded portion 10f is formed (step S5 in FIG. 7).
Here, since the pressing portion 5a which is the lower end portion of the bent plate 5 has a shape with an appropriate R in the cross section in the plate thickness direction, a U-shaped wire hooking portion 10g having an arc portion corresponding to this R. Is formed.

Finally, when the folding plate 5 is further lowered and passes through the long hole 1c, the square terminal 10A (see FIG. 6) bent into a U-shape is separated from the folding plate 5 and falls downward (FIG. 7). Step S6). In FIG. 6, the square terminal 10 </ b> A is shown sideways, but when ejected from the base 1, the insulating insertion portion 10 b and the substrate insertion portion 10 c are turned up and the folded portion 10 f is turned down as shown in FIG. 5. And fall.
As described above, the rectangular terminal 10A as shown in FIG. 6 is produced.

  As described above, when the wire 10 is bent into a Z shape, the square wire 10 is cut first, and the center portion of the cut square wire 10a is pressed by the holding block 2, so that the insulating insertion portion 10b of the square wire terminal 10A is pressed. And the substrate insertion portion 10c can be processed at the same time, so that the processing time can be shortened.

  In addition, since the step of bending in the Z-shape and the step of bending in the U-shape are performed on one base 1 as described above, it is not necessary to transport the square line to each bending step. Processing time can be shortened.

  Moreover, since it forms using the bending board 5 when forming the wire hook part 10g as mentioned above, since the circular arc shape of the wire hook part 10g is stabilized, the position of the hooked wire (crossover line) Therefore, it is possible to obtain an electric motor stator that is stable and of good quality.

  1 base, 1a square wire holding part, 1b guide, 1c long hole, 1d bending guide, 1e corner, 1f corner, 2 holding block, 2a slit, 3 bending block, 3a 90 ° bending guide, 4 bending block, 4a 90 ° bending guide, 5 bending plate, 5a pressing part, 10 square wire, 10a square wire after cutting, 10b insulating insertion part, 10c substrate insertion part, 10d free end part, 10e free end part, 10f folding part, 10g wire Hook, 10A square wire terminal, 10B primary molded product, 100 square wire terminal manufacturing device.

Claims (5)

In a method of manufacturing a terminal having a predetermined shape by bending a square wire,
After cutting the square line to a predetermined length , one bending block that bends one end of the cut square line in one direction, and the other end of the cut square line is the one direction. The other bending block that bends in the opposite direction is simultaneously moved in the opposite direction on the base surface, so that the ends on both sides are bent by approximately 90 ° with the center portion of the cut square line fixed, and then cut. Bending the subsequent square line into a Z-shape in the same plane;
Bending the center part of the molded product bent into the Z shape into a long hole having a depth direction perpendicular to the base surface with a bending plate to form a terminal by bending it into a U shape;
The manufacturing method of the terminal characterized by having.   2. The method of manufacturing a terminal according to claim 1, wherein when the square line is cut into a predetermined length, the square line is cut obliquely with respect to the axis. In an apparatus for manufacturing a terminal having a predetermined shape by bending a square wire,
A base having a groove-like guide into which the square line is inserted, a slot provided in a direction orthogonal to the guide, and a convex square holding part provided with the guide and the slot;
A holding block for fixing the central portion of the square line;
Simultaneously move in opposite directions on the base, bend the free ends on both sides of the cut square line cut to a predetermined length by about 90 °, and cut the square line in the same plane to Z Two bending blocks that bend in a shape,
A bending plate for pushing the square line bent into the Z shape into the elongated hole and bending it into a U shape;
An apparatus for manufacturing a terminal, comprising:   4. The terminal according to claim 3, wherein each of the bending blocks has an L-shaped 90 ° bending guide at a front portion in a moving direction on a lower surface and a side portion facing a step of the rectangular holding portion. manufacturing device.   The terminal manufactured by the manufacturing method of the terminal of Claim 1 or 2, or the terminal manufacturing apparatus of Claim 3 or 4.

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