JPH0583820A - Compression/pressure adhesion clamping tool - Google Patents

Abstract

PURPOSE:To provide a compression/pressure adhesion clamping tool provided with a light clamp head having high Young's modulus and fatigue resistance. CONSTITUTION:The compression/pressure adhesion clamping tool comprises a clamp head 22, a cylinder member fixed to an end of the clamp head 22, a ram member disposed movably in the cylinder member, one dies 31, fixed to the clamp head 22, and the other dies 312 disposed oppositely to one dies 311 and retractively by means of the ram member. At least the clamp head 22 among the clamp head 22, the cylinder member and the ram member is made of a composite material wherein reinforcing member 23, i.e., ceramic whiskers, is dispersed into a matrix metal 24 of aluminum alloy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression / crimping clamp tool used for cutting an electric wire or the like, and more particularly to a compression / crimping clamp tool in which a material of a clamp head is improved.

[0002]

2. Description of the Related Art Generally, a compression / crimping clamp tool having a structure shown in FIG. 5 is known. That is, reference numeral 1 in the drawing is a clamp tool. The clamp tool 1 includes a clamp head 2. The clamp head 2 is provided with a hollow portion 3 having a substantially oval shape with a front surface cut out. A cylinder member is provided below the clamp head 2. The cylinder member includes a cylinder body 4 that is inserted into the lower portion of the clamp head 2 and a piston rod 5 that is inserted into the cylinder body 4 and that reciprocates by a hydraulic system or the like (not shown). In the cylinder body 4, a ram head 6 and a bottomed cylindrical ram body 7 which are vertically connected to each other by screws or the like.
The ram member consisting of is inserted. The piston rod 5 is connected to the bottomed cylindrical bottom portion of the ram body 7. A spring 8 for returning the ram body 7 to its original position when the pressing force by the piston rod 5 is released is arranged in the ram body 7 so as to wind the piston rod 5. Cavity 3 of the clamp head 2
One die 9 ₁ is attached to the. The other die 9 ₂ is attached to the upper surface of the ram head 5 so as to face the _one die 9 ₁ .

In the compression / crimping clamp tool having the above-described structure, for example, to cut an electric wire laid on a utility pole, the electric wire is passed through the front notch of the clamp head 2 and a pair of soybeans 9 are arranged in the cavity 3. Put it between ₁ and 9 ₂ ,
The piston rod of the cylinder member is moved upward, the ram head 6 and the ram body 7 connected to the piston rod are moved in the same direction, and the other die 9 ₂ attached to the ram head 6 is directed toward the _one die 9 _1. By moving, the electric wire located between the dice 9 ₁ and 9 ₂ is compressed and cut. Specifically, as shown in FIG. 6, the clamp tool 1 is attached to the tip of a long hollow rod 11, one end of a hose 12 is connected to the cylinder body 4 of the clamp tool 1, and the other end is passed through the hollow rod 11. It is connected to the hydraulic compressor 13. The operator 14 moves the hollow rod 11 on the ground, engages the clamp tool 1 at the tip thereof with the electric wire 16 at a high place installed on the electric pole 15, and then operates the compressor 13. The electric wire 16 is cut by the same operation as described above.

To connect an electric wire erected on a utility pole with a connector, two electric wires are butted, and the butted portion is covered with the connector, and then the clamp tool is used to perform the same operation as described above. The connector is compressed to make a connection.

By the way, since the clamp head of the conventional compression / crimping clamp tool receives a high load during use,
It was formed of a material that can be used repeatedly, for example, Cr-Mo steel having high tensile strength and high fatigue strength. However, as described above, the clamp tool is used for cutting an electric wire or the like at a high place by a worker on the ground, or is used for connecting a connector at a high place. Mo steel (specific gravity; 7.8)
Therefore, when the clamp head is formed, there is a problem that the burden on the operator increases. For example, if the clamp tool is heavy, the operator is tired and the work efficiency is reduced. If the clamp tool shakes and positioning is difficult, the work efficiency is similarly reduced. Further, in recent years, there has been a demand for mechanization and automation of the above-mentioned work, and a weight reduction is inevitably required.

For this reason, it has been partially put into practical use to form the clamp head of the compression / crimping clamp tool from a lightweight Ti alloy (for example, Ti-6Al-4V, specific gravity: 4.5). There is. However, since the Ti alloy is inferior in fatigue strength, the clamp head made of the Ti alloy is liable to be cracked by repeated load, and the performance which is not necessarily satisfactory in reliability cannot be obtained. Further, since the clamp head made of the Ti alloy has a high propagation speed when the cracks occur, it may fly 20 to 30 m during the work, and there is a problem that dangerous work is forced. Further, since the clamp head made of the Ti alloy is more expensive than the Cr-Mo steel, there is a problem that the cost of the clamp tool becomes high.

An object of the present invention is to provide a clamp head that is lightweight, has a high Young's modulus and fatigue resistance, and is free from the risk of cracking and scattering, so that work can be performed in a safe environment and the work load is reduced. It is intended to provide a compression / crimping clamp tool capable of improving work efficiency.

Another object of the present invention is to provide a compression / crimping clamping tool which is further lightweight and which prevents the cylinder member and the ram member from being bitten.

[0009]

A clamp tool for compression / crimping according to the present invention comprises a clamp head, a cylinder member inserted into an end portion of the clamp head, and the cylinder member attached to the cylinder member. A ram member movably arranged therein, one die attached to the clamp head, and the other die arranged so as to face the one die and movable in the forward and backward directions by the ram member. In the provided clamp tool, at least the clamp head among the clamp head, the cylinder member and the ram member is made of an aluminum alloy or a magnesium alloy containing one or more kinds of reinforcing materials selected from ceramic fibers, ceramic whiskers and ceramic particles. It is formed by a composite material that is composited with a matrix metal. The one in which the features.

The compression / crimping clamping tool according to the present invention will be described in detail below with reference to FIG.

The clamp tool 21 includes a clamp head 22.
Is equipped with. The clamp head 22 is made of an aluminum alloy or a magnesium alloy (matrix metal) 2 containing one or more reinforcing materials 23 selected from ceramic fibers, ceramic whiskers and ceramic particles.
4 is formed from a composite material dispersed therein. The clamp head 22 is formed with a hollow portion 25 having a substantially oval shape with a front surface cut out. A cylinder member is provided below the clamp head 22. The cylinder member is inserted into the lower portion of the clamp head 12 and is inserted into the cylinder body 26, and the piston rod 27 is reciprocated by a hydraulic system (not shown).
It consists of and. In the cylinder body 26,
A ram member including a ram head 28 and a bottomed cylindrical ram body 29 that are vertically connected to each other by screws or the like is inserted. The piston rod 27 is connected to the bottomed cylindrical bottom portion of the ram body 29. The ram body 29
Inside, a spring 3 for returning the ram body 29 to the original position when the pressing force by the piston rod 27 is released.
0 is arranged so as to wind the piston rod 27. One die 31 ₁ is attached to the hollow portion 25 of the clamp head 22. The other die 31 ₂ is attached to the upper surface of the ram head 28 so as to face the _one die 31 ₁ .

As an aluminum alloy which is a matrix metal constituting the composite material, for example, Al-Cu-M is used.
High-strength alloys such as g-based alloys and Al-Zn-Mg-based alloys, A
1-Mg-Si alloy, Al-Mn alloy, Al-Si
A system alloy etc. can be used. The aluminum alloy is specifically AA2024, AA5052, AA60.
61, AA7075 and the like. In particular, AA7075 is preferable because it has higher strength than other aluminum alloys. As the magnesium alloy, for example, ASTM-AZ91C or the like can be used. These alloys are selected in consideration of the usage environment of the clamp tool.

Examples of the ceramic fiber which is a reinforcing material constituting the above composite material include, for example, alumina continuous fiber, carbon continuous fiber, silicon carbide continuous fiber, boron continuous fiber, alumina short fiber, and alumina silica short fiber as a ceramic whisker. Examples thereof include silicon carbide whiskers, titanium boride whiskers, potassium titanate whiskers, aluminum borate whiskers, and the like, and examples of the ceramic particles include alumina particles, silicon carbide particles, silicon nitride particles, and the like. These can be used in the form of one kind or a mixture of two or more kinds. In particular, from the viewpoint of improving the strength of the composite material and reducing the cost, it is preferable to use at least one selected from silicon carbide whiskers and silicon carbide particles in the reinforcing material.

The reinforcing material is formed by adding 5 to the matrix metal.
It is desirable to disperse at a space filling rate of ~ 50%. The reason is that if the space filling rate of the reinforcing material is less than 5%, it becomes difficult to obtain a composite material having sufficiently high strength, while if the space filling rate of the reinforcing material exceeds 50%, die casting, forging, etc. Molding process becomes difficult. The more preferable space filling rate of the reinforcing material with respect to the matrix metal is in the range of 15 to 35%.

More preferably, the clamp head is formed of a composite material in which the reinforcing material is dispersed in the metal matrix in the forms shown in (1) to (3) below.

(1) At least one selected from ceramic short fibers and ceramic whiskers as the reinforcing material.
A clamp head is formed of a composite material in which the reinforcing material is oriented and dispersed along the curved portion in the matrix metal by using a seed material. Specifically, as shown in FIG. 1 described above, the clamp head 22 includes a reinforcing material (for example, ceramic whiskers) 23 and an aluminum alloy or a magnesium alloy (matrix metal) 2
4 is formed from a composite material that is oriented and dispersed along the curved portion.

The ceramic short fibers and ceramic whiskers used as the reinforcing material are particularly preferably silicon carbide short fibers and silicon carbide whiskers.

The space filling ratio of the reinforcing material to the matrix metal is 5 to 5 for the same reason as described above.
It is desirable to set it to 0%, more preferably 15 to 35%.

(2) A clamp head is formed of a composite material in which the reinforcing material is partially dispersed in the metal matrix on the inner peripheral portion of the curved portion. Specifically, as shown in FIG. 2, the clamp head 22 includes a reinforcing material (for example, ceramic whiskers) 23 and an aluminum alloy or magnesium alloy (matrix metal) 2 in the inner peripheral portion of the curved portion.
4 partly dispersed composite material.

As the above-mentioned reinforcing material, it is preferable to use at least one selected from silicon carbide whiskers and silicon carbide particles, particularly from the viewpoint of improving the strength and cost of the composite material.

The reinforcing material is added to the matrix metal by 1
It is desirable to partially disperse at a space fill factor of 0-50%. The reason is that the space filling rate of the reinforcement is 10%.
If it is less than the above range, it becomes difficult to obtain a composite material having a sufficiently high strength suitable for a clamp head. On the other hand, if the space filling rate of the reinforcing material exceeds 50%, molding processes such as die casting and forging become difficult. The more preferable space filling rate of the reinforcing material with respect to the matrix metal is in the range of 15 to 45%.

When the reinforcing material is partially dispersed in the metal matrix of the inner peripheral portion of the curved portion, it is allowed to be oriented and dispersed along the curved portion.

(3) The space filling ratio of the reinforcing material to the metal matrix is highest in the inner peripheral portion of the curved portion, and the space filling ratio of the reinforcing material to the metal matrix is from the inner peripheral portion to the outer peripheral portion of the bending portion. The clamp head is formed of a composite material having a configuration that is temporarily reduced toward the.

As the reinforcing material, it is preferable to use at least one kind selected from silicon carbide whiskers and silicon carbide particles, particularly from the viewpoint of improving the strength and cost of the composite material.

The space filling rate of the reinforcing material dispersed in the inner peripheral portion of the curved portion is 10 to 50%, more preferably 1
It is desirable to set it in the range of 5 to 45%.

The compression / crimping clamp tool according to the present invention comprises at least one of the clamp head, the cylinder member and the ram member selected from the group consisting of ceramic fibers, ceramic whiskers and ceramic particles. It is preferable to form the reinforcing material by a composite material in which a matrix metal composed of an aluminum alloy or a magnesium alloy is dispersed. Particularly, it is preferable that all of the clamp head, the cylinder member, and the ram member are formed of the composite material.

[0027]

The function of the compression / crimping clamp tool according to the present invention is as follows.
A composite in which at least one of the clamp head, the cylinder member and the ram member is dispersed in a matrix metal made of an aluminum alloy or a magnesium alloy and one or more kinds of reinforcing materials selected from ceramic fibers, ceramic whiskers and ceramic particles. It is formed of a material. Since the composite material is lightweight and has a high Young's modulus and fatigue resistance, the clamp head made of the composite material is unlikely to be cracked by a repeated load, and can be prevented from scattering due to the cracking. Therefore, when the electric wire installed on the utility pole is cut by the clamp tool having the clamp head, it is possible to perform the work in a safe environment without the risk of cracks and scattering of the clamp head and to reduce the work load. It is possible to reduce and improve work efficiency.

Further, as the reinforcing material, at least one material selected from ceramic short fibers and ceramic whiskers is used, and the clamp head is made of a composite material in which the reinforcing material is oriented and distributed along a curved portion in a matrix metal. By forming the clamp head, it is possible to reduce the weight of the clamp head and further improve the Young's modulus and the fatigue strength. Therefore, it is possible to remarkably suppress the occurrence of cracks due to repeated loads.

Further, by forming the clamp head from the composite material in which the reinforcing material is partially dispersed in the metal matrix of the inner peripheral portion of the curved portion, the clamp head can be reduced in weight and cost and required. It is possible to improve Young's modulus and fatigue strength of the area where

Further, the space filling ratio of the reinforcing material to the metal matrix is highest in the inner peripheral portion of the curved portion, and the space filling ratio of the reinforcing material to the metal matrix is from the inner peripheral portion to the outer peripheral portion of the bending portion. By forming the clamp head from the composite material of which the construction is temporarily reduced, the clamp head can be lightened and the Young's modulus and fatigue strength can be remarkably improved. As a result, cracking due to repeated load can be remarkably prevented, and a long-life clamp tool can be obtained.

Further, not only the clamp head,
By forming at least the cylinder member of the cylinder member and the ram member from the composite material, the ram is attached to the cylinder body during operation of the clamp tool incorporating the respective members due to the excellent wear resistance of the composite material. The phenomenon of biting can be surely prevented, and the work such as cutting of the electric wire can be smoothly performed for a long period of time.

That is, since the Ti alloy used as the conventional clamp head has a slightly low Young's modulus,
The clamp head made of the Ti alloy has a greater flexure when subjected to a load than the clamp head made of Cr-Mo steel. Further, the Ti alloy also has poor wear resistance. Therefore, in the clamp tool incorporating the clamp head and the cylinder member (particularly, the cylinder body) made of the Ti alloy, the ram in the cylinder body is impaired in the linear motion due to the bending of the clamp head during the operation. Then, since the cylinder body is made of a Ti alloy having poor wear resistance, the ram bites into the cylinder body. Therefore, conventionally, the biting phenomenon is prevented by improving the structures of the cylinder member and the ram member. However, such a clamping tool not only has a complicated structure, but also has a problem of high cost.

From the above, by forming the clamp head and the cylinder member from the composite material having excellent wear resistance as described above, the ram has the above-mentioned characteristics when the clamp tool incorporating the respective members is operated. The phenomenon of biting into the cylinder body can be surely prevented, and the structure of the cylinder member and ram member is simplified without improving the structure as in the past, and the work such as cutting of the electric wire can be smoothly performed for a long period of time. be able to. Further, by forming the clamp head and the cylinder member from the composite material, it is possible to provide a clamp tool which is further reduced in weight.

[0034]

EXAMPLES Examples of the present invention will be described in detail below.

Example 1 First, an alumina fiber (Al ₂ O ₃ ; 85%, Si
O ₂ ; 15%, average fiber diameter 17 to 18 μm, tensile strength; 1.8 GPa, Young's modulus; 210 GPa) are bundled in an arc shape, and then a small amount of a binder having a silica component is added to form a space filling rate. Produced a 50% preform. Then, after drying the preform, the preform is placed in a mold of a molten metal forging machine, the molten metal of aluminum alloy (AA7075) at 750 ° C. is pressure-impregnated into the preform, and solidified under a high pressure of 100 MPa. A clamp head made of composite material was produced.

The obtained clamp head is formed of a composite material in which alumina fiber which is a reinforcing material is dispersed in aluminum alloy (AA7075) which is a matrix metal. Take a sample from the clamp head and
Various properties after S, T6 treatment (Young's modulus, tensile strength, 0.
2% proof stress, fatigue strength and specific gravity) were investigated. The results are shown in Table 1 below. The fatigue strength was measured according to the JIS Z2273 rotating bending fatigue strength test. In addition, Table 1 below shows the Cr-Mo steel (SCM435), Ti alloy (Ti
Various characteristics of -6Al-4V) are also shown.

Table 1 Example 1 (Note) Cr-Mo steel Ti alloy Young's modulus (GPa) 150 (120) 195 110 Tensile strength (MPa) 900 (170)> 980 980 0.2% yield strength (MPa) 830 (> 140) )> 830 920 Fatigue strength (MPa) 760 540 490 Specific gravity 2.9 7.8 4.5 (Note) The measured values of Example 1 in Table 1 above are values in the direction parallel to the alumina fiber, in parentheses. The measured value indicates the value in the direction perpendicular to the fiber.

Example 2 SiC fiber (average fiber diameter 10 to 15 μm, tensile strength;
2500 MPa, Young's modulus; 190 GPa) were bundled in an arc shape, a small amount of a binder having a silica component was added and molded, and a preform having a space filling rate of 50% was placed in a mold of a molten metal forging machine, and aluminum at 750 ° C. Alloy (AA5
The molten metal of 052) was pressure-impregnated into the preform, and 1
A clamp head made of a composite material was produced by solidifying under a high pressure of 00 MPa.

A sample was taken from the obtained clamp head and various characteristics after JIS and T6 treatment were examined. The results are shown in Table 2 below.

Table 2 Example 2 (Note) Young's modulus (GPa) 120 (100) Tensile strength (MPa) 880 (90) 0.2% yield strength (MPa)> 830 (> 70) Fatigue strength (MPa) 650 Specific gravity 2. 7 (Note) In Table 2, the measured values of Example 2 are values in the direction parallel to the SiC fibers, and the measured values in parentheses are the values in the direction perpendicular to the fibers.

As is clear from Tables 1 and 2, the clamp head incorporated in the clamp tool of the present invention is comparable in strength to the conventional clamp head made of Cr-Mo steel and made of Ti alloy. It can be seen that the Young's modulus and fatigue strength are higher than those of No. 1, and the weight is reduced to 1/3 to 2/3 as compared with the conventional clamp head.

Example 3 First, SiC whiskers (average diameter: 0.1 to 1.0 μm)
m, tensile strength; 14 GPa, Young's modulus; 480 GP
After a) is immersed in an organic binder and vacuum-suctioned to form a columnar shape, the powder is pressed into a space filling rate of 10%,
Four types of preforms of 17%, 25% and 40% were produced. Subsequently, each of the above preforms is dried to 800 ° C.
After being sintered in, it is placed in the mold of a molten metal forging machine, and is made of aluminum alloys AA2024, AA5052, AA6.
The preform was pressure-impregnated with the molten metal of 061 and AA7075 and solidified under a high pressure of 100 MPa, and the molded body was taken out from the mold. The resulting billet is 420 ° C
Then, 16 types of clamp heads were manufactured by performing hot forging.

A sample was taken from each of the obtained clamp heads, and various characteristics after JIS and T6 treatment were examined. The results are shown in Table 3 below. In Table 3, the upper row indicates tensile strength (unit: MPa), and the lower row in parentheses indicates fatigue strength (unit: M).
Pa) is shown respectively.

Table 3 Space-filling rate of SiC whiskers Base material 10% 17% 25% 40% AA2024 620 660 780 760 (590) (610) (710) (700) AA5052 490 580 620 660 (460) (540) (540) ( 590) (600) AA6061 500 600 600 620 660 (470) (570) (580) (610) AA7075 660 720 810 780 (610) (660) (750) (710) Further, the space filling rate in the clamp head. 25% S
Table 4 below shows other characteristics (Young's modulus, 0.2% proof stress and specific gravity) of the clamp head made of the composite material of iC whiskers / AA7075.

[0045] As is clear from Tables 3 and 4, the clamp head incorporated in the clamp tool of the present invention is slightly inferior to the Ti alloy in tensile strength, but has a weight of about 2/3 and a specific strength. Thus, it is found that it is superior to the Ti alloy and further superior to the Ti alloy in terms of fatigue strength.

Example 4 SiC fiber (average fiber diameter 10 to 15 μm, tensile strength;
250 MPa, Young's modulus; 190 GPa) were bundled in an arc shape, a small amount of a binder having a silica component was added and molded, and a preform having a space filling rate of 50% was placed in a mold of a molten metal forging machine, and magnesium at 750 ° C. Alloy (ASTM
A clamp head made of a composite material was produced by impregnating the above preform with a molten metal of -AZ91C) under pressure in an argon gas atmosphere and solidifying it under a high pressure of 100 MPa.

A sample was taken from the obtained clamp head, and various characteristics after JIS, T6 treatment were examined. The results are shown in Table 5 below.

Table 5 Example 4 (Note) Young's modulus (GPa) 110 (100) Tensile strength (MPa) 820 (90) 0.2% proof stress (MPa)> 780 (> 80) Fatigue strength (MPa) 600 Specific gravity 2. 1 (Note) The measured values of Example 4 in Table 5 above are values in the direction parallel to the SiC fibers, and the measured values in parentheses are values in the direction perpendicular to the fibers.

Example 5 First, SiC whiskers (average diameter: 0.1 to 1.0 μm)
m, tensile strength; 14 GPa, Young's modulus; 480 GP
After a) was immersed in an organic binder, vacuum suction was performed to form a columnar shape, and the powder was pressed into a preform having a space filling rate of 30%. Subsequently, the preform is dried and sintered at 800 ° C., and then placed in a mold of a molten metal forging machine, and a magnesium alloy at 750 ° C. (ASTM-
A molten metal of AZ91C) was pressure-impregnated in an argon gas atmosphere and solidified under a high pressure of 100 MPa, and a molded body was taken out from the mold. The obtained billet was extruded at 420 ° C. and further subjected to high temperature die forging to produce a clamp head.

A sample was taken from the obtained clamp head and various characteristics after JIS and T6 treatment were examined. The results are shown in Table 6 below.

[0051] As is clear from Tables 5 and 6, Examples 4, 5
It can be seen that even in the case of (1), a clamp head having higher strength and lighter weight than the conventional material can be realized.

Example 6 SiC particles (SiC; 99% or more, average particle diameter 4.6 μ)
m, specific gravity 3.20) and aluminum alloy (AA707
The powder of 5) was mixed so that the space filling rate of SiC particles was 25%, and the mixture was uniformly mixed by a vibrating ball mill.
Extrusion was performed at 20 ° C., sintering was performed, and further high temperature die forging was performed to produce a clamp head.

A sample was taken from the obtained clamp head, and various characteristics after JIS and T6 treatment were examined. The results are shown in Table 7 below.

[0054] As is clear from Table 7, the clamp head made of the SiC particle reinforced aluminum alloy composite material incorporated in the clamp tool of the present invention has higher strength and lighter weight than the conventional material.

Examples 7 to 12 Six types of clamp tools having the structure shown in FIG. 1 were assembled using the clamp heads of Examples 1 to 6 described above.

Comparative Examples 1 and 2 Using a clamp head made of Ti alloy (Ti-6Al-4V) and Cr-Mo steel (SCM435), FIG.
Two types of clamp tools having the structure shown in FIG.

With respect to the clamp tools of Examples 7 to 12 and Comparative Examples 1 and 2, wire rods similar to electric wires were sandwiched between dies, and the piston rod was moved upward by, for example, a hydraulic compressor, and connected to the piston rod. By moving the ram body in the same direction along the cylinder body and moving the other die attached to the ram head toward the one die, a load of 8 tons is applied to the wire rod located between the dies. The operation of compressing was repeated, and the number of times when a crack was generated in the clamp head was examined, and whether or not fragments were scattered due to the crack was examined. In addition,
If biting between the cylinder body and ram body occurs in the repeated load test, disassemble the clamp tool to a normal state and repeat the load test again to determine the number of times when cracks occur in the clamp head. At the same time as the inspection, the presence or absence of scattering of fragments due to cracking was examined. The results are shown in Table 8 below.

[0058] Examples 13 to 18 In the clamp tools of Examples 7 to 12, the cylinder head (cylinder body and piston rod) and the ram member (ram head and ram body) incorporated in these clamp tools are replaced by the clamp heads of Examples 1 to 6 described above. And the same composite material.

Comparative Examples 3 and 4 In the clamp tools of Comparative Examples 1 and 2, the cylinder member and the ram member incorporated in these clamp tools were made of the same material (Ti alloy and Cr-) as those of the clamp heads.
Mo steel).

Examples 13 to 18 and Comparative Examples 3 and 4
With regard to the clamping tool of, the wire rod similar to the electric wire is sandwiched between the dies, the piston rod is moved upward by, for example, a hydraulic compressor, the ram body connected to the piston rod is moved in the same direction along the cylinder body, and the ram head By moving the other die attached to the one die toward the one die, an operation of applying a load of 8 tons and compressing the wire rod located between the dies is repeated, whereby the cylinder body and the ram body are separated from each other. The number of times biting occurred was examined. The results are shown in Table 9 below.

[0061] As is apparent from Table 8 above, the clamp tool of the present invention has a clamp head with excellent durability, and it can be understood that high-altitude work can be performed safely without the risk of cracks and scattering.

Further, as is clear from Table 9, the clamp tool of Comparative Example 3 in which the clamp head, the cylinder body and the ram body were formed of Ti alloy bites in the compression repetition test shorter than the life of the clamp head (20,000 times). It can be seen that On the other hand, the clamp tool of the present invention has a life of the clamp head (for example, Example 13).
It can be understood that the clamp head can smoothly perform the work such as cutting of the electric wire for a long period of time even if the clamp head is 40,000 times or more) without causing a trouble due to biting.

Further, as in the present invention, the clamp head, the cylinder member (cylinder body and piston rod) and the ram member (ram head and ram body) are made of a composite material, whereby the weight of the clamp tool can be further reduced. did it.

Example 19 First, SiC whiskers (average diameter; 0.1 to 1.0 μm)
m, tensile strength; 14 GPa, Young's modulus; 480 GP
After a) is immersed in an organic binder and formed into a cylindrical shape by vacuum suction, the powder is pressed into a space filling rate of 17%,
A 25% preform was made. Subsequently, each of the above preforms was dried, sintered at 800 ° C., and then placed in a mold of a molten metal forging machine to form an aluminum alloy AA6.
The preform was pressure-impregnated with the molten metal of 061 and AA7075 and solidified under a high pressure of 100 MPa, and the molded body was taken out from the mold. The resulting billet is 420 ° C
Then, hot forging was performed to prepare four types of clamp heads having a structure in which SiC whiskers were oriented along the curved portion as shown in FIG.

Test pieces were sampled by cutting out from each of the obtained clamp heads in a direction parallel to the orientation and a direction perpendicular to the orientation, and various properties (tensile strength, fatigue strength) after JIS and T6 treatment were examined. The results are shown in Table 10 below. In addition,
The upper row in Table 10 shows the tensile strength (unit: MPa), and the lower parentheses show the fatigue strength (unit: MPa).

[0066] Example 20 First, SiC whiskers (average diameter; 0.1 to 1.0 μ)
m, tensile strength; 14 GPa, Young's modulus; 480 GP
After a) is immersed in an organic binder and formed into a cylindrical shape by vacuum suction, the powder is pressed to obtain a space filling rate of 25%,
A 40% preform was made. Subsequently, each of the above preforms was dried, sintered at 800 ° C., and then placed in a mold of a molten metal forging machine to form an aluminum alloy AA6.
The preform was pressure-impregnated with the molten metal of 061 and AA7075 and solidified under a high pressure of 100 MPa, and the molded body was taken out from the mold. The resulting cylindrical billet was halved so as to pass through its diameter, combined with a billet of the same shape made of AA7075, extruded at 420 ° C., and further hot forged to obtain SiC whiskers with curved parts as shown in FIG. Four types of clamp heads having a partially composited structure arranged on the inner peripheral portion were produced.

Samples (test pieces) were taken from the composite parts of the obtained clamp heads, and various properties (tensile strength, fatigue strength) after JIS and T6 treatment were examined. The results are shown in Table 11 below. In Table 11, the upper row indicates tensile strength (unit: MPa), and the lower row in parentheses indicates fatigue strength (unit: MP).
a) is shown respectively.

Table 11 Space-filling rate of SiC whiskers Base material 25% 40% AA6061 620 660 (580) (610) AA7075 810 780 (750) (710) Example 21 First, SiC whiskers (average diameter: 0.1 to 0.1) 1.0μ
m, tensile strength; 14 GPa, Young's modulus; 480 GP
The a) was dipped in an organic binder and poured in advance into a mold having the same shape as the inner circumference of the curved portion of the clamp head so that the space filling rate was 17%.
% And 25% of two preforms were produced. Next, after drying each of the preforms and sintering at 800 ° C., the preforms are placed at a predetermined portion of a mold having a shape of a clamp head, and are made of aluminum alloys AA6061 and AA7.
The preform is pressure-impregnated with 075 molten metal,
Four types of clamp heads were produced by solidifying under a high pressure of 0 MPa.

When the obtained clamp head was cut and the cross section was observed, it was confirmed that the SiC whiskers were arranged on the inner peripheral portion of the curved portion as shown in FIG. 2 and had a partially composite structure. .. Samples (test pieces) were taken from the composite part of each of the clamp heads, and various properties (tensile strength, fatigue strength) after JIS and T6 treatment were examined. The results are shown in Table 12 below. In Table 12, the upper row indicates tensile strength (unit: MPa), and the lower row in parentheses indicates fatigue strength (unit: M).
Pa) is shown respectively.

Table 12 Space-filling rate of SiC whiskers Base material 17% 25% AA6061 500 520 (450) (470) AA7075 600 660 (540) (600) Examples 22 to 27 25% SiC whiskers in Example 19 / AA
6065 composite, 25% SiC whiskers / AA70
Two kinds of clamp heads composed of 75 composite materials, the partial composite part in the above Example 20 is 25% SiC whiskers /
AA6065 composite, 25% SiC whiskers / AA
Two types of clamp heads made of a composite material of 7075, the composite material of the partial composite portion in the above-mentioned Example 21 is 25% SiC whiskers / AA6065, 25% SiC whiskers /
Six types of clamp tools having the structure shown in FIG. 1 were assembled using two types of clamp heads made of the composite material of AA7075.

Example 28 First, SiC whiskers (average diameter: 0.1 to 1.0 μm)
m, tensile strength; 14 GPa, Young's modulus; 480 GP
a) is dipped in an organic binder, vacuum-sucked to form a plate, and then pressed to obtain a space filling ratio of 5%, 15
%, 25% and 35% preforms were produced. Subsequently, each of the preforms was pressure-impregnated with a molten metal of AA7075, which is an aluminum alloy, by a molten metal forging method. Continuing, the space filling rate is 5 as shown in Fig. 3.
% Composite plate 41, the same filling rate 1% composite plate 42, the same filling rate 25% composite plate 43 and the same filling rate 35% composite plate 44 are stacked and hot-press bonded to form a laminated composite plate. 45
Was produced. Then, the laminated composite plate was subjected to hot forging to manufacture a clamp head having a structure in which the space filling rate of the inner peripheral portion of the curved portion is high and the space filling rate becomes lower toward the outer peripheral portion. A clamp tool having the structure shown in FIG. 1 was assembled using the obtained clamp head.

Example 29 First, SiC whiskers (average diameter; 0.1 to 1.0 μm)
m, tensile strength; 14 GPa, Young's modulus; 480 GP
a) and SiC particles having an average particle diameter of 4.6 μm are immersed in an organic binder, and the space filling rate is 10% by a rubber press, and 2
Cylindrical preforms of 0% and 30% and a preform having a space filling rate of 40% were prepared, respectively. Subsequently, each of the preforms was pressure-impregnated with a molten metal of AA7075, which is an aluminum alloy, by a molten metal forging method. Continuing, the space filling rate is 1 as shown in Fig. 4.
After sequentially inserting the composite cylinder 51 of 0%, the composite cylinder 52 of the same filling rate of 20%, the composite cylinder 53 of the same filling rate of 30%, and the composite cylinder 54 of the same filling rate of 40%, heat Inter-extrusion was performed to produce a columnar composite material. Next, after the composite material is halved so as to pass through the diameter, a clamp head having a structure in which the space filling rate of the inner peripheral portion of the curved portion is high and the space filling rate becomes lower toward the outer peripheral portion by hot forging is manufactured. did. The obtained clamp head is used in FIG.
A clamp tool having the structure shown in Figure 3 was assembled.

In the clamp tools of Examples 22 to 27, a wire material similar to an electric wire was sandwiched between dies, the piston rod was moved upward by, for example, a hydraulic compressor, and the ram body connected to the piston rod was attached to the cylinder body. By moving in the same direction along the same direction, by moving the other die attached to the ram head towards one die, repeating the operation of applying a load of 8 tons to the wire rod located between the dies, and compressing it. The number of times the cracks occurred in the clamp head was checked, and the presence or absence of scattered fragments was also checked. When the cylinder body and the ram body are bitten in the repeated load test, the clamp tool is disassembled and brought into a normal state, and then the load test is repeated again so that a crack occurs in the clamp head. In addition to checking the number of times, it was checked whether or not fragments were scattered due to cracking. The results are shown in Table 13 below.
Note that Table 13 shows Comparative Examples 1 and 2 described in Table 8 above.
The results are also shown.

[0074] Examples 30 to 37 In the clamp tools of Examples 22 to 29, the cylinder member (cylinder body and piston rod) and the ram member (ram head and ram body) incorporated in the clamp tools were manufactured in Example 1 by 25%. It was formed of a composite material of SiC whiskers / AA7075.

In the clamp tools of Examples 30 to 37, a wire material similar to an electric wire is sandwiched between dies, the piston rod is moved upward by, for example, a hydraulic compressor, and the ram body connected to the piston rod is attached to the cylinder body. By moving in the same direction along the same direction, by moving the other die attached to the ram head towards one die, repeating the operation of applying a load of 8 tons to the wire rod located between the dies, and compressing it. The number of occurrences of biting between the cylinder body and the ram body was examined. The results are shown in Table 14 below. In addition, Table 14 also shows the results of Comparative Examples 3 and 4 described in Table 9 above.

[0076] As is clear from Table 13, the clamp tool of the present invention has a clamp head with excellent durability and can safely perform work at high places without risk of cracks and scattering.

Further, as is clear from Table 14, the clamp tool of Comparative Example 3 in which the clamp head, the cylinder body and the ram body were made of a Ti alloy bite in the compression repetition test shorter than the life of the clamp head (20,000 times). It can be seen that On the other hand, the clamp tool of the present invention has a life of the clamp head (for example, the third embodiment
It can be seen that even if the number of clamp heads of 0 is 40,000 times or more, troubles due to biting do not occur, and work such as cutting of electric wires can be smoothly performed for a long period of time.

Further, by forming the clamp head, the cylinder member (cylinder body and piston rod), and the ram member (ram head and ram body) from a composite material as in the present invention, the clamp tool can be made further lightweight. did it.

[0079]

As described in detail above, according to the present invention, a lightweight, high Young's modulus and fatigue resistance strength is provided, and further, a clamp head that does not cause the risk of cracking and scattering is provided, and the work load is reduced in a safe environment. A clamp tool for compression / crimping which can improve work efficiency can be provided. Further, according to the present invention, it is possible to further reduce the weight, to prevent the cylinder member and the ram member from being bitten, and to smoothly perform work such as cutting of the electric wire for a long period of time. -A clamp tool for crimping can be provided.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a compression / crimping clamp tool according to the present invention.

FIG. 2 is a partially cutaway front view showing another embodiment of the compression / crimping clamp tool according to the present invention.

FIG. 3 is a perspective view showing a laminated composite body manufactured in Example 22 of the present invention.

FIG. 4 is a perspective view showing a cylindrical laminated composite produced in Example 23 of the present invention.

FIG. 5 is a partially cutaway front view showing a general compression / crimping clamp tool.

FIG. 6 is a schematic view for explaining an operation of cutting an electric wire using the clamp tool of FIG.

[Explanation of symbols]

21 ... Compression / compression clamp tool, 22 ... Clamp head, 23 ... Reinforcement material, 24 ... Matrix metal, 26 ... Cylinder body, 27 ... Piston rod, 28 ... Ram head, 29 ... Ram body, 31 ₁ , 31 ₂ Die.

[Procedure amendment]

[Submission date] May 26, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 6

[Correction method] Change

[Correction content]

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 7

[Correction method] Change

[Correction content]

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 8

[Correction method] Change

[Correction content]

[Procedure Amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

A clamp tool for compression / crimping according to the present invention comprises a clamp head, a cylinder member inserted into an end portion of the clamp head, and the cylinder member attached to the cylinder member. A ram member movably arranged therein, one die attached to the clamp head, and the other die arranged so as to face the one die and movable in the forward and backward directions by the ram member. In the provided clamp tool, at least the clamp head among the clamp head, the cylinder member, and the ram member is made of ceramic long fibers or ceramics.
It is characterized by being formed of a composite material in which one or more kinds of reinforcing materials selected from short fibers, ceramic whiskers and ceramic particles are combined with a matrix metal composed of an aluminum alloy or a magnesium alloy.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Examples of the ceramic fiber which is a reinforcing material constituting the composite material include alumina long fibers ( continuous fibers ) , carbon long fibers, silicon carbide long fibers, boron long fibers, and alumina short fibers (non- woven fibers ). Continuous fibers) , alumina silica short fibers, etc., as the ceramic whiskers, for example, silicon carbide whiskers, titanium boride whiskers, potassium titanate whiskers, aluminum borate whiskers, etc., as the ceramic particles, for example, alumina particles, silicon carbide particles, silicon nitride. Particles and the like can be mentioned respectively. These can be used in the form of one kind or a mixture of two or more kinds. In particular, from the viewpoint of improving the strength of the composite material and reducing the cost, it is preferable to use at least one selected from silicon carbide whiskers and silicon carbide particles in the reinforcing material.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

The reinforcing material is ceramic short fiber, ceramic
If it is made of whiskers or ceramic particles ,
It is desirable to partially disperse the matrix metal at a space filling rate of 10 to 50%. The reason is that if the space filling rate of the reinforcing material is less than 10%, it becomes difficult to obtain a composite material having a sufficiently high strength suitable for a clamp head, while if the space filling rate of the reinforcing material exceeds 50%. Molding processes such as die casting and forging become difficult. The more preferable space filling rate of the reinforcing material with respect to the matrix metal is in the range of 15 to 45%.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

(3) The space filling ratio of the reinforcing material to the metal matrix is highest in the inner peripheral portion of the curved portion, and the space filling ratio of the reinforcing material to the metal matrix is from the inner peripheral portion to the outer peripheral portion of the bending portion. The clamp head is formed of a composite material having a configuration that is gradually reduced toward.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

In the clamp tool for compression / crimping according to the present invention, at least the clamp head and the cylinder member of the clamp head, the cylinder member and the ram member are selected from ceramic long fibers, ceramic short fibers, ceramic whiskers and ceramic particles. Seed or 2
It is preferable to form the composite material in which one or more reinforcing materials are dispersed in a matrix metal composed of an aluminum alloy or a magnesium alloy. Particularly, it is preferable that all of the clamp head, the cylinder member, and the ram member are formed of the composite material.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

[0027]

The function of the compression / crimping clamp tool according to the present invention is as follows.
Clamping head, at least the clamping head of the cylinder member and the ram member, ceramic filaments, ceramic
It is formed by a composite material in which one or more reinforcing materials selected from short staple fibers, ceramic whiskers and ceramic particles are dispersed in a matrix metal composed of an aluminum alloy or a magnesium alloy. Since the composite material is lightweight and has a high Young's modulus and fatigue resistance, the clamp head made of the composite material is unlikely to be cracked by a repeated load, and can be prevented from scattering due to the cracking. Therefore, when the electric wire installed on the utility pole is cut by the clamp tool having the clamp head, it is possible to perform the work in a safe environment without the risk of cracks and scattering of the clamp head and to reduce the work load. It is possible to reduce and improve work efficiency.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

Further, the clamp head is made of the composite material in which the reinforcing material is partially dispersed in the metal matrix in the inner peripheral portion of the curved portion, so that the composite head is entirely composited.
As compared with the case where the clamp head is damaged, the cost of the clamp head can be reduced, and the tensile strength and the fatigue strength of the required portion can be improved.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

Further, the space filling ratio of the reinforcing material to the metal matrix is highest in the inner peripheral portion of the curved portion, and the space filling ratio of the reinforcing material to the metal matrix is from the inner peripheral portion to the outer peripheral portion of the bending portion. By forming the clamp head from a composite material having a gradually decreasing structure, the Young's modulus and fatigue strength of the clamp head can be significantly improved. As a result, cracking due to repeated load can be remarkably prevented, and a long-life clamp tool can be obtained.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

Further, not only the clamp head,
By forming at least the cylinder member of the cylinder member and the ram member from the composite material, the composite material is made of ceramic short fibers, ceramic whiskers, or ceramic whiskers.
Can reliably prevent a phenomenon that bite the ram the cylinder body during operation of the clamping tool incorporating the respective members by excellent wear resistance of Waso if made of ceramic particles, the wire for a long time Work such as cutting can be performed smoothly.

[Procedure Amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction content]

Example 1 First, alumina long fibers (Al ₂ O ₃ ; 85%, SiO 2
₂ ; 15%, average fiber diameter 17-18 μm, tensile strength;
(1.8 GPa, Young's modulus; 210 GPa) were bundled in an arc shape, and then a small amount of a binder having a silica component was added thereto to form a preform having a space filling rate of 50%. Then, after drying the preform, the preform is placed in a mold of a molten metal forging machine, the molten metal of aluminum alloy (AA7075) at 750 ° C. is pressure-impregnated into the preform, and solidified under a high pressure of 100 MPa. A clamp head made of composite material was produced.

[Procedure 16]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

The obtained clamp head is made of a composite material in which alumina long fibers which are a reinforcing material are dispersed in an aluminum alloy (AA7075) which is a matrix metal. Take a sample from the clamp head and
Various properties after S, T6 treatment (Young's modulus, tensile strength, 0.
2% proof stress, fatigue strength and specific gravity) were investigated. The results are shown in Table 1 below. The fatigue strength was measured according to the JIS Z2273 rotating bending fatigue strength test. In addition, Table 1 below shows the Cr-Mo steel (SCM435), Ti alloy (Ti
Various characteristics of -6Al-4V) are also shown.

[Procedure Amendment 17]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

Table 1 Example 1 (Note) Cr-Mo steel Ti alloy Young's modulus (GPa) 150 (120) 195 110 Tensile strength (MPa) 900 (170)> 980 980 0.2% yield strength (MPa) 830 (> 140) )> 830 920 Fatigue strength (MPa) 760 540 490 Specific gravity 2.9 7.8 4.5 (Note) The measured values of Example 1 in Table 1 above are the directions parallel to the alumina long fibers. And the measured values in parentheses are values in the direction perpendicular to the same- length fiber, respectively.

[Procedure 18]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

Example 2 SiC long fibers (average fiber diameter 10 to 15 μm, tensile strength; 2500 MPa, Young's modulus; 190 GPa) were bundled in an arc shape, and a small amount of a binder having a silica component was added to form a space filling rate of 50%. The preform of No. 1 was placed in the mold of the molten metal forging machine, and the aluminum alloy (A
A clamp head made of a composite material was manufactured by impregnating the above preform with the molten metal of A5052) under pressure and solidifying it under a high pressure of 100 MPa.

[Procedure Amendment 19]

[Document name to be amended] Statement

[Item name to be corrected] 0040

[Correction method] Change

[Correction content]

Table 2 Example 2 (Note) Young's modulus (GPa) 120 (100) Tensile strength (MPa) 880 (90) 0.2% yield strength (MPa)> 830 (> 70) Fatigue strength (MPa) 650 Specific gravity 2. 7 (Note) The measured values of Example 2 in Table 2 above are values in the direction parallel to the SiC long fibers, and the measured values in parentheses are values in the direction perpendicular to the same long fibers.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masato Morita 250 Kamigurata-cho, Totsuka-ku, Yokohama, Kanagawa Japan Burnday Co., Ltd. (72) Etsushi Nagayama 250 Kamigurata-cho, Totsuka-ku, Yokohama, Kanagawa Japan Burnday Within the corporation

Claims (8)

[Claims] 1. A clamp head, a cylinder member inserted into an end portion of the clamp head, a ram member attached to the cylinder member and movably disposed in the cylinder member, and the clamp head. A clamp tool comprising one attached die and the other die that is arranged so as to face the one die and is movable back and forth by the ram member, wherein the clamp head, the cylinder member, and the ram member are Among them, at least the clamp head is selected from ceramic fibers, ceramic whiskers and ceramic particles 1
A clamping tool for compression / crimping, which is formed of a composite material in which one kind or two or more kinds of reinforcing materials are dispersed in a matrix metal made of an aluminum alloy or a magnesium alloy. 2. The clamp tool for compression / crimping according to claim 1, wherein the composite material is formed by dispersing the reinforcing material in the matrix metal in a space filling ratio of 5 to 50%. 3. The clamp head is formed of a composite material in which a reinforcing material made of at least one selected from ceramic short fibers and ceramic whiskers is oriented and dispersed along the curved portion in the matrix metal. The compression / crimping clamp tool according to claim 1. 4. The composite material is obtained by dispersing the matrix metal with a reinforcing material comprising at least one selected from the ceramic short fibers and ceramic whiskers at a space filling ratio of 5 to 50%. The compression / crimping clamp tool according to claim 3. 5. The compression / compression bonding according to claim 1, wherein the clamp head is formed of a composite material in which the reinforcing material is partially dispersed in the metal matrix of an inner peripheral portion of a curved portion. Clamp tool. 6. The composite material comprises the matrix metal in the inner peripheral portion of the curved portion and the reinforcing material in a space filling ratio of 10 to 10.
6. A dispersion of 50%, characterized in that
Clamp tool for compression / crimping as described. 7. The clamp head has the highest space filling rate of the reinforcing material with respect to the metal matrix in an inner peripheral portion of a curved portion, and the space filling rate of the reinforcing material with respect to the metal matrix is an inner periphery of the bending portion. The compression / crimping clamp tool according to claim 1, wherein the compression / crimping clamp tool is formed of a composite material having a structure in which the diameter is gradually reduced from the portion toward the outer peripheral portion. 8. At least the clamp head, the cylinder member and the ram member of the clamp head, the cylinder member and the ram member are made of an aluminum alloy or a magnesium alloy containing one or more kinds of reinforcing materials selected from ceramic fibers, ceramic whiskers and ceramic particles. The clamp tool for compression / crimping according to any one of claims 1, 2, 3, 5 and 7, wherein the clamp tool is formed of a composite material dispersed in a matrix metal of.