JP5513924B2 - Compression die - Google Patents

Description

  The present invention relates to a compression die, and more particularly, to a compression die used when compressing a compression sleeve in which ends of two electric wires are inserted from both end openings and electrically connecting the two wires with the compression sleeve.

When connecting the conductors of two electric wires, a connecting sleeve between the two conductors is covered with a compression sleeve made of a metal having excellent conductivity such as copper into a cylindrical shape, and this is applied to a hydraulic or manual compressor. It is connected by compressing with a compression die.
The compression die is composed of, for example, a pair of split dies having a bowl-shaped compression recess as in Patent Document 1. In the compression recesses of both split dies, the recessed inner peripheral surface is the compression acting surface of the compression sleeve, and the flat side edges are the joint surfaces to the other split die.
At the time of sleeve compression, a compression sleeve placed on the connecting portion of both conductors is disposed between the compression recesses of both partial dies, and both divided dies are gradually brought close to each other by a compressor. As a result, the compression acting surfaces of both compression recesses are pressed against the outer peripheral surface of the compression sleeve, and the compression sleeve is compressed.

JP-A-8-213141

However, in the compression die described in Patent Document 1, when the sleeve is compressed, the surplus portion of the compression sleeve to which external pressure acts escapes to the outside of both compression recesses, and this expansion portion is the both compression recesses. There is a possibility that a part of the compression sleeve may be cracked by being caught in the gap between the joint surfaces. In particular, when a coated sleeve covered with an electrically insulating coating is employed, coating cracks are likely to occur due to sandwiching of the coating between the joint surfaces of both compression recesses.
Therefore, in order to solve this problem, conventionally, measures have been taken to round the end portions of both compression recesses over the entire length in the length direction of the compression die (corner R processing). However, in this method, the amount of escape to the outer side of both compression recesses of the surplus portion of the compression sleeve is increased, and the compression rate of the compression sleeve may be reduced.

  Therefore, as a result of diligent research, the inventor provided one fitting portion continuous with the compression action surface on the compression action surface side of the joint surface of one compression recess, and the compression action surface of the joint surface of the other compression recess. It has been found that the above-mentioned problem can be solved by providing the other fitting part on the side that is continuous with the compression acting surface and can be fitted to one fitting part. That is, with this configuration, when the sleeve is compressed, both fitting portions disposed on the joint surfaces of both compression recesses serve as damming members, and the compression sleeve during compression cannot escape to the outside, and both The present invention was completed by discovering that the surplus portion of the compression sleeve was not caught between the joint surfaces of the compression recesses.

  According to the present invention, the excess portion of the compression sleeve generated by the compression can be prevented from being caught between the joint surfaces of the both compression recesses, thereby increasing the compression ratio of the compression sleeve and reducing the compression of the compression sleeve. It aims at providing the compression die | dye which can also reduce the frequency | count.

According to the first aspect of the present invention, the compression sleeve in which the end portions of the two electric wires are inserted from the openings at both ends is compressed by a pair of split dies having hook-shaped compression recesses, whereby the compression sleeve allows the in the compression die is used to electrically connect the two wires, compressed recesses of the pair of split die, a compressed working surface of the inner circumferential surface the compression sleeve, and both side edge surface thereof and the other wherein a junction surface of the split die, the compression operation surface side of the joint surface of one of the compressed recess, the mating portion of one continuous with the compressed working surface is provided, the other junction of said compression recess On the compression acting surface side of the surface, there is provided the other fitting portion that is continuous with the compression acting surface and fits with the one fitting portion, and the one fitting portion and the other fitting portion with one or deviation There is formed as a fitting convex portion, the remaining A compression die which the other is formed as a fitting recess.

  According to the first aspect of the present invention, one joint portion is provided continuously with the compression acting surface on the joint surface of one compression recess, and one joint portion is provided on the joint surface of the other compression recess. The other fitting part fitted to the fitting part is provided continuously with the compression acting surface. Therefore, when the sleeve is compressed, the two fitting portions fitted to each other block the surplus portion of the compression sleeve from moving to the outside of the both compression recesses. As a result, the surplus portion cannot escape to the outside, and it is difficult for the surplus portion to bite between the joint surfaces of both compression recesses. As a result, the compression ratio of the compression sleeve increases and the number of compressions of the compression sleeve also decreases.

The compression die is constituted by a pair of divided dies, for example. As a material of both split dies, for example, die steel (SKD11, SKD1, etc.) can be employed. Both split dies have a compression recess.
A compression recessed part is a part by the side of the compression action surface which contacts a compression sleeve among division dies. A compression recessed part is a bowl-shaped member, and can be integrally provided with the same material as a split die. In addition, you may provide as a separate body with the same material as a division | segmentation die | dies, or another material. The compression recesses of the two split dies are arranged as an assembled cylindrical body with the compression acting surfaces facing each other so that the cylindrical compression sleeve can be compressed.
Thus, since the compression concave portion has a bowl shape, the surface on the side to be fitted (matched) with the other compression concave portion among the formation surfaces of the compression concave portion constitutes a central region portion of the surface and forms a half cylinder. And a flat one side edge surface and the other side edge surface constituting both side region portions thereof.

“The compression acting surface side of the joint surface of one compression recess” refers to the side (side portion) of the joining surface of one compression recess that is in contact with the compression action surface of one compression recess.
“One fitting portion continuous with the compression acting surface is provided on the compression acting surface side of the joining surface of one compression recessed portion” directly on the compression acting surface side of the joining surface of this one compression recessed portion ( It means a state in which one fitting portion is formed. In this way, there is no step between the compression acting surface and the surface on the compression acting surface side of one of the fitting portions (the gap in which the surplus portion of the compression sleeve is bitten), so the inside of one compression recess When one fitting portion is viewed from the space, it is generally difficult to determine where the compression acting surface is and where the one fitting portion is.

“The compression acting surface side of the joint surface of the other compression recess” means the compression acting surface side (side portion) in contact with this joining surface among the joining surfaces of the other compression recess.
“The other fitting portion continuous with the compression acting surface is provided on the compression acting surface side of the joining surface of the other compressing recess” is directly (on the compression acting surface side of the joining surface of the other compressing recess ( This means a state in which the other fitting portion is formed.

The shape of one fitting part and the other fitting part is a fitting convex part and a fitting concave part. For example, one fitting portion may be a fitting convex portion (plate shape, rod shape, cylindrical shape, etc.), and the other fitting portion may be a fitting concave portion (hole shape, groove shape, etc.). The opposite is also possible.
Although both fitting parts may be formed in a part of the length direction of the compression recess, in order to effectively prevent the surplus portion of the compression sleeve from bulging, the entire length of the compression recess is extended over the entire length. It is preferable to form it. Moreover, although it is preferable to arrange | position a fitting part on both the joint surfaces of a compression recessed part, you may form only in one joint surface. In that case, the effect of blocking the surplus portion of the compression sleeve to the outside of both compression recesses can be expected only on one side of the compression recess.
Examples of the electric wire include a copper wire and an aluminum wire according to the material of the conductor, a single wire and a stranded wire according to the structure of the conductor, and a bare wire and a covered wire according to the presence or absence of the coating. Furthermore, the electric wire may be single-core or multi-core.
Examples of the covering material (electrically insulating material) of the coated wire include synthetic resins such as polyethylene (including flame-resistant polyethylene), vinyl chloride, and polyamide, natural rubber, styrene butadiene rubber, chloroprene rubber, silicon rubber, and chlorosulfone. Polyethylene etc. can be adopted.

As a material of the compression sleeve, for example, a conductive material such as aluminum or copper can be employed.
The shape of the compression sleeve is arbitrary. However, a straight body is common.
In the in-cylinder space of the compression sleeve, a partition wall may be provided at an intermediate portion in the length direction of the compression sleeve. Thereby, the length of the conductor of the two electric wires connected can be made equal automatically. In addition, a conductive compound may be injected into the in-cylinder space.
The compression sleeve may be a compression sleeve with a coating covered with an insulating coating made of an electrically insulating material.

  The invention according to claim 2 is that the one split die and the other split die are made of the same member, and the one fitting portion is a fitting convex portion and the other fitting die. The joint portion is a fitting recess, and the one fitting surface of the one compression recess is provided with the one fitting portion, and the other fitting surface of the one compression recess is the other fitting portion. The other fitting portion is provided on one joint surface of the other compression recess, and the one fitting portion is provided on the other joint surface of the other compression recess. The compression die according to Item 1.

According to the second aspect of the present invention, since the pair of split dies are the same member that can be forged with one mold, the manufacturing cost of both split dies can be reduced. In addition, since the fitting projections and fitting depressions that can be fitted between the two compression depressions are arranged on the respective joint surfaces of the two compression depressions, the compression acting surfaces of the flange-shaped compression depressions are arranged at the time of sleeve compression. By simply disposing both divided dies so as to face each other, one kind of divided dies can be used as one divided dies and the other divided dies.
Each shape of a fitting convex part and a fitting recessed part is arbitrary if it is a shape which can be mutually fitted. Moreover, the number of formation is not limited.

Furthermore, the invention according to claim 3 is the compression die according to claim 1 or claim 2, wherein the compression sleeve is a compression sleeve with a coating whose outer peripheral surface is covered with an insulation coating made of an electrically insulating material. is there.

  According to the third aspect of the present invention, when a compression sleeve with a sheath whose outer peripheral surface is covered with an insulating coating is adopted as the insulating sleeve, the outer peripheral surface of the compression sleeve is formed by both fitting portions fitted to each other. Movement of the surplus portion of the insulation coating covering the outside of both compression recesses is prevented. As a result, the surplus portion of the insulating coating cannot escape to the outside, and it is difficult for the surplus portion to bite between the joint surfaces of both compression recesses. As a result, it is possible to prevent coating cracks caused by this biting.

  For example, polyethylene, polyacetal, polycarbonate, polyether sulfone, hard polyvinyl chloride, polyphenylene ether, or the like can be used as the electrical insulating material for the insulating coating.

  According to the first aspect of the present invention, one fitting portion is provided continuously with the compression acting surface on the joint surface of one compression recess, and the other compression recess is provided with the other compression recess. The fitting portion is provided continuously with the compression acting surface. Therefore, when the sleeve is compressed, it is possible to prevent the excess portion of the compression sleeve from moving to the outside of the both compression recesses by the two fitting portions fitted to each other. As a result, it is possible to suppress biting of the surplus portion between the joint surfaces of both compression recesses. As a result, the compression ratio of the compression sleeve increases and the number of compressions of the compression sleeve also decreases.

  In particular, according to the invention described in claim 2, since the pair of split dies are the same member that can be forged with one mold, the manufacturing cost of both split dies can be reduced. In addition, since the fitting projections and fitting depressions that can be fitted between the two compression depressions are arranged on the joint surfaces of the two compression depressions, the compression acting surfaces face each other when the sleeve is compressed. Only by arranging both split dies, one kind of split dies can be used as one split dies and the other split dies.

  According to the third aspect of the present invention, when a compression sleeve with a sheath whose outer peripheral surface is covered with an insulation coating is adopted as the insulation sleeve, the compression sleeve is formed by both fitting portions fitted to each other. The surplus portion of the covered insulating coating is prevented from moving outside the compression recesses. As a result, the surplus portion of the insulating coating cannot escape to the outside, and it is difficult for the surplus portion to bite between the joint surfaces of both compression recesses. As a result, it is possible to prevent coating cracks caused by this biting.

It is a front view including the partial cross section figure which shows the sleeve compression completion state of the compression die concerning Example 1 of this invention. It is a longitudinal cross-sectional view along the die length direction which shows the sleeve compression completion state of the compression die concerning Example 1 of this invention. It is a front view of the division die which constitutes a part of compression die concerning Example 1 of this invention. It is S4-S4 sectional drawing in FIG. It is a longitudinal cross-sectional view orthogonal to the die length direction which shows the sleeve compression start state of the compression die concerning Example 1 of this invention. It is a longitudinal cross-sectional view orthogonal to the die length direction which shows the fitting start state of the both fitting parts of the compression die concerning Example 1 of this invention. It is a longitudinal cross-sectional view orthogonal to the length direction of the compression sleeve compressed with the compression die | dye which concerns on Example 1 of this invention.

  Examples of the present invention will be specifically described below. Each direction described in the description is based on each direction of the compression sleeve shown in FIG.

  1 and 2, reference numeral 10 denotes a compression die according to the first embodiment of the present invention. The compression die 10 is formed on both sides of an intermediate portion of a compression sleeve 12 in which ends of two electric wires 11 are inserted from both end openings. Is compressed by a pair of upper and lower divided dies 14 and 15 having a compression recess 13 and is used when the electric wires 11 are electrically connected by the compression sleeve 12. When the compression die 10 is attached to the compressor, the lower split die 15 becomes the movable side, and the upper split die 14 becomes the fixed side.

Hereinafter, with reference to FIGS. 1-4, these structures are demonstrated in detail.
As shown in FIGS. 1 and 2, both electric wires 11 are covered wires in which a metal conductor 16 is covered with a coating 17 made of an electrically insulating olefin resin. The coating 17 is peeled off at the end of the connection side of the two electric wires 11.
The compression sleeve 12 is a thick straight tube made of aluminum, and an insulation coating 18 made of polyacetal is in close contact with the outer peripheral surface thereof to constitute a compression sleeve with coating. The length of the compression sleeve 12 varies depending on the application, for example, for a jumper portion or for an overhead wire.

As shown in FIGS. 3 and 4, both split dies 14 and 15 are made of the same member that can be used together. Here, the same member means that the material is the same die steel and has the same size and the same shape.
Both split dies 14 and 15 have a flange-shaped compression recess 13 on the side in contact with the compression sleeve 12.
In both compression recesses 13, the recessed inner peripheral surface serves as a compression acting surface 13 a for the compression sleeve 12, and the flat both side edge surfaces of the flange serve as a joint surface 13 b with the other split die. The pair of compression action surfaces 13a are curved surfaces having a constant curvature at the back (center portion), and both side portions continuous to the back are flat slopes whose intervals gradually increase outward. ing. Therefore, the contact between both joint surfaces 13b and the compression acting surface 13a is an obtuse contact between the flat surfaces. Arc-shaped grooves 13c are formed in the inner peripheral portions of both end faces in the length direction of both divided dies 14 and 15, respectively.

  Further, in the compression recess 13 (one compression recess) of the upper split die 14 (one split die), on the compression acting surface 13a side (right end side) of the left joint surface 13b (one joint surface), A plate-like fitting convex portion (one fitting portion) 19 that is continuous with the compression acting surface 13a is suspended over the entire length of the joining surface 13b. Moreover, on the compression acting surface 13a side (left end side) of the right joining surface 13b (the other joining surface), the compression acting surface 13a is continuous over the entire length of the joining surface 13b and the fitting convex portion 19 is connected. A vertical groove-shaped fitting concave portion (the other fitting portion) 20 having a fitting shape is provided.

  As shown in FIGS. 1 and 2, the lower split die 15 (the other split die) is made of the same member as the upper split die 14 as described above, and can be used as the upper split die 14. ing. Therefore, another upper divided die 14 is turned upside down and used as the lower divided die 15. Specifically, in the compression recess (the other compression recess) 13 of the lower split die 15 (the other split die), the compression acting surface 13a side (right end side) of the left joint surface (one joint surface) 13b. Is provided with a vertical groove-shaped fitting recess (the other fitting portion) 20 continuous with the compression acting surface 13a over the entire length of the joint surface 13b. Moreover, the compression acting surface 13a side (left end side) of the right joining surface (the other joining surface) 13b of the lower compression recess 13 is continuous with the compression acting surface 13a over the entire length of the joining surface 13b. A vertical fitting convex portion (one fitting portion) 19 having a shape that can be fitted to the fitting concave portion 20 on the right side of the compression concave portion 13 is provided.

Next, with reference to FIGS. 1-6, the compression operation | work of the compression sleeve 12 by the compression die | dye 10 which concerns on Example 1 of this invention is demonstrated.
First, the upper divided die 14 is mounted on the fixing member of the compression operation portion of the hydraulic compressor, and the lower divided die 15 is separated from the fixing member so that the compression acting surfaces 13a of both compression recesses 13 face each other. Then, it is mounted on the opposed movable member. Thereafter, one side portion of the intermediate portion in the length direction of the compression sleeve 12 in which the end portions of the two electric wires 11 are inserted from the openings at both ends is inserted into the compression concave portion 13 of the upper split die 14 and gripped (see FIG. 5).

Next, the compression operation unit of the compressor is operated, and the lower split die 15 is gradually raised to approach the split die 14. As a result, the tip of the fitting convex portion 19 formed on the left joint surface 13b of the upper compression recess 13 is inserted into the fitting recess 20 formed on the left joint surface 13b of the lower compression recess 13. (FIG. 6). At the same time, the tip of the fitting convex portion 19 formed on the right joint surface 13b of the lower compression concave portion 13 is inserted into the fitting concave portion 20 formed on the right joint of the upper compression concave portion 13. . Immediately thereafter, both the slopes of the compression acting surface 13 a of the lower split die 15 abut against both lower side portions of the insulating coating 18 of the compression sleeve 12.
After that, the operation on the compression side by the compression operation unit is continued and the lower divided die 15 is raised. As a result, the surplus portion 12 a of the compression sleeve 12 generated by the compression moves to a substantially triangular gap in a cross-sectional view formed between the slopes of the compression acting surface 13 a of both compression recesses 13. Therefore, the compression sleeve 12 having a cylindrical shape is compressed into an eye shape with a circle extending left and right in a cross section perpendicular to the length direction of the compression sleeve 12 (FIGS. 2 and 7).

At this time, the corresponding fitting convex part 19 and the fitting concave part 20 are provided on the joint surfaces 13b of the both compression concave parts 13 continuously with the compression action surface 13a without any step. Therefore, when the sleeve is compressed, the two fitting portions 19 and 20 fitted to each other block the movement of the surplus portion 12a generated by the compression to the outside of the both compression recesses 13. As a result, the surplus portion 12a cannot escape to the outside, and it is difficult for the surplus portion 12a to bite between the joint surfaces 13b of both compression recesses 13. As a result, the compression rate of the compression sleeve 12 increases and the number of compressions of the compression sleeve 12 also decreases.
Moreover, since both the split dies 14 and 15 are the same member that can be forged with one mold, the manufacturing cost of the split dies 14 and 15 can be reduced. In addition, since the fitting convex portion 19 is provided on one joint surface 13b of both compression concave portions 13 and the fitting concave portion 20 is provided on the other joint surface 13b of both compression concave portions 13, a flange-shaped compression concave portion is provided when the sleeve is compressed. By simply disposing the two divided dies 14 and 15 so that the 13 compression acting surfaces 13a face each other, one type of divided die can be used as both the upper divided die 14 and the lower divided die 15.

Furthermore, since the compression sleeve 12 is a compression sleeve with a sheath whose outer peripheral surface is covered with an insulating coating 18, the compression portion of the insulating coating 18 is compressed by the fitting portions 19 and 20 fitted to each other when the sleeve is compressed. The surplus covering portion 18 a that covers the surplus portion 12 a of the sleeve 12 is not moved to the outside of the compression recesses 13. As a result, the surplus covering portion 18a cannot escape to the outside, and it is difficult for the surplus covering portion 18a to bite between the joint surfaces 13b of both compression recesses 13. As a result, it is possible to prevent coating cracks caused by this biting.
Thereafter, the compression position of the compression sleeve 12 by the compression die 10 is moved to the other side portion of the intermediate portion in the length direction of the compression sleeve 12, and the same compression operation is performed (the two-dot chain line portion in FIG. 2).

  The present invention is a compression die for compression of a linear sleeve (linear compression sleeve) that electrically connects two electric wires, and for compression of a coated linear sleeve in which the outer peripheral surface of the linear sleeve is covered with an insulating coating. Useful.

10 compression dies,
11 Electric wire,
12 compression sleeve,
13 compression recess,
13a compression working surface,
13b joint surface,
14,15 Divided dies,
18 Insulation coating,
19 fitting convex part (one fitting part),
20 Fitting recess (the other fitting portion).

Claims (3)

By compressing the compression sleeve in which the end portions of the two electric wires are inserted from the openings at both ends with a pair of split dies having a flange-shaped compression recess, the two electric wires are electrically connected by the compression sleeve. In the compression die used when
Compression recesses of the pair of split die, a compressed working surface of the inner circumferential surface the compression sleeve, and a joint surface of the both side edge surface thereof and the other of said split die,
On the compression acting surface side of the joint surface of one of the compression recesses, one fitting portion continuous with the compression acting surface is provided,
On the compression acting surface side of the joint surface of the other compression recess, the other fitting portion that is continuous with the compression acting surface and fits with the one fitting portion is provided ,
A compression die in which one of the one fitting part and the other fitting part is formed as a fitting convex part, and the other is formed as a fitting concave part . The one split die and the other split die are made of the same member that can be used together,
The one fitting part is a fitting convex part, and the other fitting part is a fitting concave part,
The one fitting surface of the one compression recess is provided with the one fitting portion, and the other fitting surface of the one compression recess is provided with the other fitting portion,
The one fitting surface of the other compression recess is provided with the other fitting portion, and the other fitting surface of the other compression recess is provided with the one fitting portion. Compression dice.   The compression die according to claim 1 or 2, wherein the compression sleeve is a compression sleeve with a coating whose outer peripheral surface is covered with an insulating coating made of an electrically insulating material.

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