JPH07143629A - Wire compressor - Google Patents

Abstract

PURPOSE:To reduce a weight by forming a wire compressor having a head member, a cylinder member, a ram member and a compression die of at least high strength Al-base composite material in which a strengthening material made of at least one the of ceramic short fiber and ceramic whisker is combined with high strength Al matrix. CONSTITUTION:A wire compressor 6 has a compression die 4a fixed to the opening of the head member 1 of a substantially U shape via a die clamper 5. Further, a cylinder member 2 and a ram member 3 telescopically inserted into the member 2 are disposed at a lower side opposed to the die 4a, and a compression die 4b is fixed to the member 3. The members 1, 2, 3 and the dies 4a, 4b are formed of a high strength Al-base material in which a strengthening material made of at least one type of ceramic short fiber and ceramic whisker is combined with high strength Al matrix. Thus, the entirety is reduced in weight, its durability is improved, and an operation at a high place is safely conducted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire compressor used for compression connection of erected electric wires.

[0002]

2. Description of the Related Art Generally, an electric wire compressor having a structure shown in FIG. 1 is known. That is, the head member 1 is substantially U-shaped, the compression die 4a is fixed to the opening by the die fixture 5, and the cylinder member 2 is provided at the lower end portion facing the compression die 4a.
And the ram member 3 which is freely movable back and forth is arranged therein, and the compression die 4b is fixed to the ram member 3 to form the electric wire compressor 6. Then, pass the wire through the sleeve and insert it into the compression die 4
It is sandwiched between a and the compression die 4b for compression connection.

In the electric wire compressor 6, for example, when making a compression connection of an electric wire erected on a steel tower, an operator carries the electric wire compressor 6 to a portion of the erected electric wire to be compressed, and the electric wire is compressed. The region to be compressed is sandwiched between the compression dies 4a and 4b, and compression processing is performed by a hydraulic mechanism or the like. Conventionally, the compression dies 4a and 4b have been manufactured from high-strength Cr-Mo steel or Ti alloy.

[0004]

As described above, when the electric wire compressor 6 performs the electric wire compressing work, the worker carries the electric wire compressor 6 to a portion of the installed electric wire to be compressed, Since the work of sandwiching the wire between the compression dies 4a and 4b is required, the conventional electric wire compressor made of steel is too heavy, has poor workability, and is dangerous.

Therefore, in recent years, it has been considered to form the constituent members of the electric wire compressor from a Ti alloy or the like to reduce the weight of the electric wire compressor itself and improve the workability.
However, when the constituent members of the electric wire compressor are made of Ti alloy, fatigue strength and abrasion resistance are insufficient, and there is a problem in reliability as an electric wire compressor. Especially for the compression die
When an alloy is used, Ti alloy has a problem because it has poor wear resistance.

[0006]

SUMMARY OF THE INVENTION The present invention has been made as a result of intensive studies in view of such circumstances, and an object thereof is to provide an electric wire compressor which is lightweight and has a high Young's modulus and fatigue strength. It is intended to reduce the work load and improve safety in the. That is, the invention according to claim 1 is a head member, a cylinder member mounted inside the head member, and attached to the cylinder member,
A ram member movably arranged in the cylinder member, one compression die movable in advance and retreat by the ram member, and one compression die arranged to face the one compression die and fixed to the head member. In the electric wire compressor including the other compression die, the head member, the cylinder member, the ram member or the compression die is a high strength Al matrix in which a reinforcing material made of at least one of ceramic short fibers or ceramic whiskers is used. It is an electric wire compressor characterized by being formed from a high-strength Al-based composite material.

According to a second aspect of the present invention, the high-strength Al-based composite material constituting the compression die according to the first aspect is a composite of high-strength Al matrix and ceramic long fibers as a reinforcing material, and The electric wire compressor according to claim 1, wherein the reinforcing material is oriented in a direction perpendicular to the electric wire sandwiched between the compression dies.

According to a third aspect of the present invention, the high-strength Al-based composite material constituting the compression die according to the first aspect is a composite of high-strength Al matrix and ceramic short fibers or ceramic whiskers as a reinforcing material. The electric wire compressor according to claim 1, wherein the reinforcing material is oriented in a longitudinal direction of an electric wire sandwiched between the compression dies.

According to a fourth aspect of the present invention, the high-strength Al-based composite material according to the first, second or third aspect is obtained by compounding the high-strength Al matrix with the reinforcing material, and the high-strength A matrix.
4. The electric wire compressor according to claim 1, 2 or 3, wherein the l matrix is subjected to sub-aging treatment or over-aging treatment.

The invention according to claim 5 is the invention as defined in claims 1, 2, and 3.
Or the high-strength Al that constitutes the compression die according to item 4.
The base composite material is SiC whiskers or alumina short fibers in a high-strength Al matrix at a volume composite ratio of 20 to 30 vo.
4. A composite of 1% and claim 1, 2, 3
Alternatively, it is the electric wire compressor described in 4.

The invention according to claim 6 is the invention according to claims 1, 2 and
The high-strength Al-based composite material forming the head member, the cylinder member, and the ram member described in 3, 4, or 5 is SiC whisker or alumina short fiber having a high-strength A.
The electric wire compressor according to any one of claims 1 to 5, wherein the electric wire compressor is composited in an amount of 15 to 25 vol% in a volume ratio of 1 matrix.

[0012]

In the electric wire compressor of the present invention, the head member, the cylinder member, the ram member, or the compression die has a high-strength Al-based matrix in which a reinforcing material composed of at least one of ceramic fibers or ceramic whiskers is combined with a high-strength Al matrix. Since it is made of a composite material, the electric wire compressor is lightweight and has good workability. Further, since the reinforcing material is compounded in the high-strength Al matrix, the head member, the cylinder member, the ram member, and the compression die have high strength and high Young's modulus, and high fatigue resistance strength that can withstand long-term use. Will be a member having. Further, normally, the compression die is inevitably worn due to friction with the electric wire to be processed, but the compression die constituting the electric wire compressor of the present invention has Since the wear of the Al matrix is suppressed, the compression die has good wear resistance and a long life.

As a method of compounding the reinforcing material with the high-strength Al matrix, a molten metal forging method, a powder metallurgy method or the like can be applied. Further, in order to process it into a shape such as a compression die, a method of subjecting the composite billet manufactured by the above method to cutting or die forging, and the method of near net shape are also effective.

For the high-strength Al matrix of the present invention, it is desirable to use, for example, an Al-Cu-Mg-based alloy or an Al-Zn-Mg-based alloy. For the reinforcing material of the present invention, for example, SiC whiskers, alumina short fibers, carbon short fibers, titanium boride short fibers, potassium titanate whiskers, aluminum borate whiskers, and the like can be used. These may be used alone or in combination of two or more. Particularly, in the head member, the cylinder member, and the ram member, the SiC whiskers have a volumetric composition ratio of 15 to 25 vol.
% Composite is desirable from the viewpoint of strength, machinability, toughness and the like. If it is less than 15 vol%, the strength is insufficient, while if it exceeds 25 vol%, the cutting process becomes difficult and the toughness deteriorates. In the case of a compression die, S
It is desirable that iC whiskers are compounded in a volumetric composition ratio of 20 to 30 vol%, particularly from the viewpoint of improving wear resistance. If it is less than 20 vol%, the wear resistance and strength as a compression die are insufficient, while if it exceeds 30 vol%, it does not contribute much to the improvement of strength, but the workability deteriorates in molten metal forging and die forging. Is.

The main purpose of compounding long ceramic fibers as a reinforcing material is to improve strength. In the invention of claim 2, as shown in FIG. 4, the ceramic long fibers are compounded so as to be oriented in the direction perpendicular to the electric wire sandwiched between the compression dies. The vertical strength of the strongly applied wire is particularly improved. Note that FIG. 4 is an explanatory view showing the orientation state of the composite ceramic long fibers 16, and a part of the ceramic long fibers 16 is drawn.

On the other hand, the main purpose of compounding ceramic short fibers or ceramic whiskers as a reinforcing material is to improve the strength and wear resistance. In the invention according to claim 3, it is the use of an electric wire compressor that ceramic short fibers or ceramic whiskers are compounded so as to be oriented in the longitudinal direction of an electric wire sandwiched between compression dies as shown in FIG. 2 (A). This is to improve the wear resistance in the longitudinal direction of the electric wire, which is the direction in which the wire is particularly worn. In addition, as a method of orienting, for example, in a molten metal forging method, a method of orienting the reinforcing material by forging the produced composite billet is effective. Note that FIG. 2A is an explanatory diagram showing the orientation state of the SiC whiskers 8 compounded as a reinforcing material, and a part of the SiC whiskers 8 is drawn.

Further, in the invention of claim 4, the reason why the high-strength Al matrix is subjected to the sub-aging treatment or the over-aging treatment is for improving the toughness, and the resistance to the propagation of cracks generated by stress is applied. Is increasing.

It is effective that the compression die forming the electric wire compressor of the present invention is made of a composite of a large amount of reinforcing material particularly in a portion sandwiching the electric wire, which is a portion to which stress is applied during use. Alternatively, if the reinforcing material is compounded only at the portions sandwiching the electric wire, the expensive reinforcing material can be saved.

[0019]

EXAMPLE An electric wire compressor produced in an example of the present invention is one in which an electric wire is passed through a sleeve for compression, and an electric wire having a diameter of 28.5 mm is targeted, and as a method for compounding a reinforcing material with a high-strength Al matrix. The molten metal forging method was adopted.

Example 1 In Example 1, the compression die shown in FIG.
The head member shown in (B) was manufactured by a near net shape by a molten metal forging method. As a reinforcing material, SiC whiskers (average diameter 0.1 to 1.0 μm, average length 15 μm
Whiskers, tensile strength of about 14 GPa, Young's modulus of 48
(About 0 GPa) was used, and this was put into an aqueous solution containing an organic binder, stirred, put in a mold, and vacuum sucked to prepare a preform. The volume filling rate of the preform was adjusted by vacuum suction and pressing. Next 800
The preform preheated to ℃ was installed in the mold of the heated molten metal forging machine, and the high-strength Al matrix molten metal shown in Table 1 was pressure-impregnated, and then solidified under pressure (100 MPa) to perform composite casting. A lump was made. Table 1 shows the SiC whisker composite ratio in the composite ingot.

Next, the composite ingot thus prepared was subjected to a cutting finishing process to prepare a compression die and a head member. Cemented carbide is used as the cutting tool, and the wear status of the cutting tool due to wear is also shown in Table 1. The test pieces were sampled from the test piece collecting portions 12 and 14 shown in FIG. 3 of the compression die and the head member thus manufactured, and subjected to JIST6 heat treatment, and then the tensile strength and the fatigue strength (according to JIS Z2273) were measured. The results are also shown in Table 1. Regarding Examples No. 8 and No. 18, Young's modulus, 0.2% proof stress, and specific gravity were measured from the above test pieces. The results are shown in Table 2 together with those of the conventional materials (steel and Ti). Since the shape of the composite ingot manufactured by the near net shape is different, the test piece sampling portion 12,
There were some differences in the properties of 14.

Example 2 A composite ingot was prepared in the same manner as in Example 1 except that the prepared composite ingot had a cylindrical shape. The composite ingot thus prepared was die forged to prepare a head member and a compression die. Si
Table 3 shows the C whisker composite ratio and the high strength Al matrix. Further, in the case of the head member, die forging with a high SiC whisker composite ratio (30 vol% or more) could not be performed. Table 3 shows that the die forging was possible, and Table 3 shows that it was broken during the die forging.

Next, the compression dies of Examples Nos. 21 to 30 described above were installed in an existing electric wire compressor (a conventional electric wire compressor made of steel), and a round bar made of steel was coated with pure Al (diameter 48).
(mm) was sandwiched between compression dies and subjected to a durability test in which a load of 100 tons was repeatedly applied. And the number of repetitions is 30
The wear depth of the wear surface of the die at the time of reaching 000 times was examined. The results are also shown in Table 3.

When the compression die and the head member produced above were cut and examined with a microscope, it was confirmed that the SiC whiskers 8 and 10 were oriented in parts a and b of FIG. 2 as shown in the figure. It was Note that FIG. 2 is an explanatory view showing the produced compression die and head member, and the SiC whiskers 8 and 10 are drawn in a larger scale than they actually are, and only a part thereof is drawn. Regarding Example Nos. 23, 28, 33, 38,
The test piece collecting portion 1 of FIG. 3 corresponding to the portions a and b of FIG.
Test pieces were sampled from Nos. 2 and 14 in the direction in which the SiC whiskers were oriented, subjected to JIST6 heat treatment, and then measured for tensile strength and fatigue strength (according to JIS Z2273).
For Nos. 23 and 28, 0.2% proof stress, Young's modulus, and true compression fracture stress (according to JIS G4805) were also measured. The results are shown in Table 4.

Regarding Examples Nos. 23, 28, 33 and 38, the fracture toughness of the specimens subjected to the JIST6 heat treatment and the specimens subjected to the solution heat treatment followed by the sub-aging or the over-aging were measured. The results are shown in Table 5.

Example 3 Alumina filaments (average diameter 17 to 17) were used as ceramic filaments.
18 μm, average length 20 mm, tensile strength 1.8 GPa
The Young's modulus is about 210 GPa). A preform was produced by bundling this into a shape of a compression die and a head member similar to those in Example 1. At this time, the alumina long fibers were bundled as shown in FIG. 4 (in FIG. 4, the ceramic long fibers 16 are read as alumina long fibers). Next, using this preform, A70 was formed as a high-strength Al matrix.
No. 75, a compression die and a head member were manufactured by a near net shape by a molten metal forging method in the same manner as in Example 1 (the composite ratio of alumina long fibers is defined as the reinforcing material composite ratio in Table 6).
Shown in). From the compression die of Example No. 41 thus manufactured, a test piece is collected at the test piece collecting portion 12 shown in FIG. 3, and a test piece is collected from the head member of the example No. 42 at a test piece collecting portion 18 shown in FIG. did. Then, the test piece was subjected to JIST6 heat treatment, and then the tensile strength was 0.2%.
The yield strength, Young's modulus, fatigue strength (according to JIS Z2273), and specific gravity were measured. The results are shown in Table 6. Since the shapes of the preforms were different, there was a slight difference in the characteristics of the test piece collecting portions 12 and 18 having the shape of the composite ingot produced.

It is installed in an existing electric wire compressor (a conventional electric wire compressor made of steel), a rod (diameter 30 mm) in which a pure Cu is coated on a SUS round rod is sandwiched between compression dies, and a load of 100 tons is repeatedly applied. The endurance test is performed as described above in Examples 1, 2, and 3.
Example No. 8, 28, 41 among the compression dies manufactured in
And Example No. 18, 38, 42 among the head members. Then, the above durability test was performed until cracking occurred. The number of N was set to 5, and Table 7 shows the average value of the number of repetitions at the time of crack occurrence. For comparison, Table 7 also shows the results of the durability test on the conventional compression die and head member made of Cr-Mo steel and the results of the durability test on the compression die and head member made of Ti-6Al-4V.

[0028]

[Table 1]

[0029]

[Table 2]

[0030]

[Table 3]

[0031]

[Table 4]

[0032]

[Table 5]

[0033]

[Table 6]

[0034]

[Table 7]

According to the results of Table 1, N is used as the compression die.
o3, 4, 8, and 9 were particularly excellent in strength characteristics. No. 1 with higher SiC whisker composite ratio than these
In Nos. 0, 15 and 20, it was not found that the strength characteristics were further improved, and the wear consumption of the cutting tool during cutting was large. Therefore, as a compression die, in terms of efficiency of improvement of strength characteristics and cutting cost, the SiC composite rate is 20 to
About 25 vol% was suitable. Table 2 shows the Young's modulus, 0.2% proof stress, and specific gravity of Nos. 7 and 18.

Looking at the results in Table 3, in the case of the compression die,
No. 25, 30 with a SiC whisker composite rate of 40 wt%
Could not be die forged. In the case of the head member, since the shape is more complicated than that of the compression die, the die forging processing could not be performed on Nos. 34, 35, 39 and 40 having a SiC whisker composite ratio of 30 wt%. The wear depth of the compression die according to the durability test of the compression die is 0.1 m for No23 and No28.
m, No. 24, and No. 29 were almost 0, indicating high wear resistance.

Table 4 shows the results of measuring the strength characteristics of Nos. 23 and 28 in Table 3, which were superior to the strength characteristics of the near net shape compression die shown in Table 1. This is probably because the SiC whiskers, which are the reinforcing material, were oriented by the die forging.

Table 5 shows the compression dies and head members produced by die forging, when they were sub-aged and over-aged, and when they were JIST.
Comparison with the case of 6 treatments shows that the sub-aging or over-aging was superior in terms of fracture toughness. Therefore, an appropriate aging condition for the head member can be selected depending on the usage conditions of the wire compressor.

Table 7 shows No. 8, 28 and 4 of the above-mentioned examples.
1 is a table showing the results of the durability test of the compression die of No. 1 and the head members of Nos. 18, 38 and 42, and the results of the durability test of the compression die of the conventional material and the head member. The head member showed durability comparable to that of the conventional example. As shown in Tables 4 and 6, the compression dies and head members of the examples have specific gravities of about 1/3 of Cr-Mo steel and about 2/3 of Ti alloy.
It is lightweight. In the embodiment described above, the compression die and the head member are described among the members constituting the electric wire compressor of the present invention, but it is needless to say that the present invention can be applied to other cylinder members and ram members. The electric wire compressor assembled with these is lightweight and has excellent durability.

[0040]

As described in detail above, the electric wire compressor of the present invention is lightweight and highly durable. As described above, the electric wire compressor of the present invention is lightweight and has high durability, which reduces the work load on the operator and further contributes to the safety of the work, thus making a significant industrial contribution. .

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of an electric wire compressor of the present invention.

FIG. 2 is an explanatory diagram showing a compression die (A) and a head member (B) of Example 2 and showing an orientation state of SiC whiskers in a portion and b portion.

FIG. 3 shows a compression die (A) and a head member (B), and shows a test piece sampling portion.

FIG. 4 is an explanatory view showing a compression die of Example 3 and showing an orientation state of ceramic long fibers (alumina long fibers in Example 3).

FIG. 5 shows a test piece sampling portion of the compression die of Example 3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head member 2 Cylinder member 3 Ram member 4a Compression die 4b Compression die 5 Die fixing tool 6 Electric wire compressor 7 Compression die 8 SiC whiskers 9 Head member 10 SiC whiskers 11 Compression dies 12 Test piece sampling part 13 Head member 14 Test piece sampling Part 15 Compression die 16 Seramook long fiber 17 Compression die 18 Test piece collection part

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Naoshi Kikuchi 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Kenjiro Yamagata 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.

Claims (6)

[Claims] 1. A head member, a cylinder member mounted inside the head member, a ram member attached to the cylinder member and movably arranged in the cylinder member, and reciprocable by the ram member. In one of the compression dies, and the one compression die arranged to face the one compression die, and the other compression die fixed to the head member, wherein the head member, the cylinder member, Electric wire compression characterized in that the ram member or the compression die is formed of a high-strength Al-based composite material in which a reinforcing material made of at least one of ceramic fibers or ceramic whiskers is composited in a high-strength Al matrix. vessel. 2. The high-strength Al-based composite material forming the compression die according to claim 1, wherein ceramic long fibers are compounded as a reinforcing material in a high-strength Al matrix, and the reinforcing material is the compression die. The electric wire compressor according to claim 1, wherein the electric wire compressor is oriented in a direction perpendicular to the electric wire sandwiched between the electric wire compressors. 3. The high-strength Al-based composite material constituting the compression die according to claim 1, wherein ceramic short fibers or ceramic whiskers are composited as a reinforcing material in a high-strength Al matrix, and the reinforcing material is The electric wire compressor according to claim 1, wherein the electric wire is sandwiched between the compression dies and oriented in a longitudinal direction of the electric wire. 4. The high strength A according to claim 1, 2 or 3.
3. The l-based composite material, wherein the reinforcing material is compounded in a high-strength Al matrix, and the high-strength Al matrix is subjected to sub-aging treatment or over-aging treatment. The electric wire compressor described in 3. 5. The high-strength Al-based composite material forming the compression die according to claim 1, 2, 3 or 4.
The electric wire compressor according to claim 1, 2, 3 or 4, wherein whisker or alumina short fibers are compounded in a high-strength Al matrix in a volumetric composition ratio of 20 to 30 vol%. 6. The high-strength Al-based composite material forming the head member, the cylinder member, and the ram member according to claim 1, 2, 3, 4, or 5, wherein SiC whiskers or alumina short fibers have high strength. The electric wire compressor according to claim 1, wherein the electric wire compressor is composited in an Al matrix in a volume composite ratio of 15 to 25 vol%.