JPH10202372A - Manufacture of composite member and composite member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To join two or more members with high strength, to form a high precise shape and to integrate with one time forming. SOLUTION: Other members 1a, 1b are integrated with a connecting member 2. An amorphous alloy having a supercooled liquid zone is used as the connecting member 2, heated up to the temperature of the supercooled liquid zone, pressed and formed with a forming die, and thereafter cooled. The composite member having excellent precision is manufactured owing to high strength and a high transcribing property the amorphous alloy provides.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing a composite member by integrating two or more members and a composite member manufactured by the method.

[0002]

2. Description of the Related Art Many methods for integrating two or more members into a composite member have been developed. As one of the methods, there is a method in which individual members are produced by processing such as cutting, forging, casting, and the like, and these are joined together by welding, bonding, brazing, or the like to integrate them.

[0003] Japanese Patent Publication No. 6-47198 discloses a material for a member integrated by a mixed powder of a metal powder, a ceramic powder, and a resin powder. A method is described in which a molded member and a mixed powder for molding another member are combined in a molding die and molded to integrate the two members.

Japanese Patent Application Laid-Open No. 8-294868 discloses a method of manufacturing a grinding and polishing tool, in which a melt of an aluminum alloy is poured into a mold while polishing powder to be a grinding and polishing layer is placed in a mold. It describes casting into a mold, casting under high pressure, and solidifying.

[0005]

SUMMARY OF THE INVENTION In a method in which individual members are separately manufactured and then assembled and integrated, welding,
The members are joined by bonding and brazing. However, welding is performed by heating the joints to a temperature higher than the melting point of the members, and the base material is deteriorated by heating, thereby lowering the strength of the joints and causing distortion due to solidification shrinkage during cooling. There is a problem that accuracy is reduced. The same applies to brazing, and there is a problem that the base material is deteriorated by heating and the strength of the joint is reduced. Bonding cannot be used in a high temperature environment because the bonding strength is lower than other bonding methods and the softening point of the adhesive is low.

[0006] On the other hand, in light alloy die casting, members to be assembled are installed in a mold, and casting is performed at the same time as casting. However, since this casting method is limited to light alloy materials, high casting is required. It cannot be applied to members that require strength, and must be heated to a temperature equal to or higher than the melting point of the light alloy, and must be formed at a high temperature.

[0007] The method disclosed in Japanese Patent Publication No. 6-47198 cannot be applied to members that require a high strength because the members are integrated by heating and melting the resin. Further, the transfer accuracy from the molding die is on the order of submicron, so that it cannot be applied to a member having a fine shape requiring transfer accuracy.

[0008] The method disclosed in JP-A-8-294868 is
Since the member to be assembled is exposed to a temperature higher than the melting point of the molding material, there is thermal damage to the member, and not only the strength of the member is reduced, but also when the member to be molded solidifies, it shrinks and deforms. There is a problem that it cannot be applied to a member requiring shape accuracy.

The present invention has been made in view of such conventional problems. By utilizing the characteristics of an amorphous alloy containing no crystal, a composite having high strength and small dimensional deformation at the time of joining is obtained. An object of the present invention is to provide a method for manufacturing a member and a composite member.

[0010]

In order to achieve the above-mentioned object, a method for manufacturing a composite member according to the present invention is a method in which two or more members are integrated by molding. At least one member integrating the member or two or more other members is made of an amorphous alloy having a supercooled liquid region, and heating this one member and another member to the temperature of the supercooled liquid region, It is characterized in that one member and the other member are integrated by press-molding with a molding die, and then cooled.

When the amorphous alloy having a supercooled liquid region used in the present invention is heated to the glass transition temperature (Tg) of the supercooled liquid region, it becomes a viscous fluid and usually has a viscosity of 10M.
Desired molding can be performed at a low pressure of Pa or less. Further, the amorphous alloy having the supercooled liquid region has a thickness of several tens nm.
It has a transfer accuracy on the order and manufactures a mold for forming an amorphous alloy with high accuracy, so that it is molded with extremely high shape accuracy higher than the submicron order and integrated with other members.

The amorphous alloy has a high-precision transfer characteristic, and when heated and pressed with another member, is formed while filling microscopic irregularities on the surface of the other member. When cooled and solidified, it becomes innumerable micro-meshed state with the surface of other members. Thereby, it is firmly joined to other members and integrated. This also applies to the case where two or more members are integrated with an amorphous alloy, and the two or more members can be firmly integrated.

Further, since the amorphous alloy has a high hardness of 300 to 500 Hv when solidified,
It can also be applied to members for applications requiring high bonding strength and high altitude.

Glass transition temperature Tg of amorphous alloy
Is about 200 ° C. for low-temperature ones, and about 650 ° C. for high-temperature ones. This temperature is about 200 to 700 ° C. lower than the general brazing temperature for silver brazing. Also, the temperature is sufficiently lower than the melting point of the aluminum alloy used for die casting. Furthermore, the temperature is so low that it is incomparable even when compared with the welding temperature at which the member needs to be heated above the melting point of the member. Because of the low molding temperature, integration using an amorphous alloy does not cause thermal deterioration of the base material that occurs during welding or brazing.
There is no decrease in the strength of the joint due to thermal degradation.

Further, the amorphous alloy is free from deformation due to solidification shrinkage generated by welding or the like, so that a composite member having high dimensional accuracy can be obtained. Further, since the glass transition temperature Tg of the amorphous alloy is sufficiently higher than the heat resistance temperature of the adhesive, the glass transition temperature Tg can be applied to a member used in a high-temperature environment.

In the present invention, after the above-mentioned heating and press molding,
Perform cooling. If the high temperature state is maintained even after the members are integrated, the amorphous alloy crystallizes and becomes brittle, so that the strength decreases. Therefore, cooling is performed, and cooling is performed at a cooling rate that prevents crystallization and in a temperature range that prevents crystallization.

In the present invention, at least one of the two or more members to be integrated is made of an amorphous alloy, and a composite member can be manufactured by a single molding. There is no need to join and integrate, so that the manufacturing process can be greatly shortened, and rapid manufacturing becomes possible.

Assuming the above manufacturing method,
In the present invention, the following specific manufacturing means can be appropriately adopted.

(A) A method of integrating two or more members by molding, wherein at least one member integrated with another member or at least one member integrated with two or more other members is excessive. It is made of an amorphous alloy having a cooling liquid region, the other member is made of a wire-like member, and one member and another member are heated to the temperature of the supercooled liquid region, and are pressed and formed by a molding die to form one member. The member and other members are integrated, and then cooled.

In this means, basically, the above-mentioned method is used. However, another member integrated by the amorphous alloy having the supercooled liquid region is a wire-like member. This wire-shaped member is long and its positioning is difficult, but in the means (a), a molding die is used,
It is molded while being pressed by this molding die and integrated.
For this reason, the positioning of the long wire member can be easily and reliably performed, and the wire member can be integrated with high accuracy.

(B) A method of forming and integrating two or more members consisting of a working member and a holding member for holding the working member, wherein one or both of the working member and the holding member are formed. The member is made of an amorphous alloy having a supercooled liquid region, and the working member and the holding member are heated to the temperature of the supercooled liquid region, pressed and integrated by a molding die, and then cooled.

In this means (b), one or both of the working member and the holding member are made of an amorphous alloy, and this amorphous alloy is integrated with the other member by the same action as described above. For this reason, the working member and the holding member are firmly integrated. Further, even if the working member has a complicated outer shape, a good shape can be formed by the high transfer characteristics of the amorphous alloy, and the molding can be completed by one molding.

(C) A method in which two or more members consisting of one ring-shaped member and another ring-shaped member joined to the inner or outer periphery of the one ring-shaped member are integrated by molding. One or both of the one ring member and the other ring member are made of an amorphous alloy having a supercooled liquid region, and these ring members are heated to the temperature of the supercooled liquid region, and formed. It is pressed and integrated by a mold and then cooled.

By this means (c), a composite member in which two or more ring-shaped members are integrated can be produced by utilizing the characteristics of the amorphous alloy. This composite member has the chemical resistance of an amorphous alloy and becomes a member having chemical resistance.

(D) In any of the above means (a) to (c), the surface roughness of the contact surface with the amorphous alloy in the mold is set to Rmax = 1.2 μm or less.

Since the amorphous alloy has excellent transferability, it may be difficult to release the mold from the mold by firmly joining the mold to the mold after molding. This means (d)
By making the surface roughness of the mold high as described above, the degree of joining of the amorphous alloy to the mold is reduced, and the mold is easily released from the mold.

(E) In any one of the above means (a) to (c), the member having a roughness of Rmax = 10 μm or more in contact with the amorphous alloy is integrated with the member made of the amorphous alloy. Become

When the amorphous alloy is heated to the glass transition temperature, the amorphous alloy is filled in the microscopic unevenness of another member, and solidifies in this filled state, thereby firmly bonding with the other member. In order to sufficiently fill the amorphous alloy, the surface roughness of other members is set in the above range. Thus, a composite member that is firmly integrated can be manufactured.

The composite member of the present invention is characterized in that at least one member integrated with another member or at least one member integrated with two or more other members is made of an amorphous alloy having a supercooled liquid region. And the other member are heated to the temperature of the supercooled liquid region, pressed and formed by a forming die, integrated, and then cooled to be formed.

More specifically, the composite member has the above (a) to
It is manufactured by means of (e). This composite member has at least one member made of an amorphous alloy, has high strength and durability due to the hardness of the amorphous alloy, and has high shape accuracy.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIG. 1 shows a composite member of Embodiment 1, in which wire-like members 1a and 1b are connected by a connecting member 2 to be integrated. FIG. 2 shows an apparatus for manufacturing this composite member.

The mold 3 is formed by the movable mold 5 and the fixed mold 6, and the movable mold 5 is brought into close contact with the fixed mold 6 and clamped to form a cavity 4 therebetween.
In this case, as described later, a Zr-based amorphous alloy that is easily oxidized is used as the connecting member 2.
In order to prevent the oxidation, the entire mold 3 is placed in a vacuum chamber (not shown).

The cavity 4 has substantially the same shape as the outer shape of the connecting member 2 shown in FIG. The ends of the wire-like members 1a and 1b are inserted into the cavity 4 to cover these ends. In order to fix the wire-like members 1a and 1b coaxially and oppositely, wire guide grooves 4a and 4b communicate with the cavity 4.

The movable mold 5 includes a template 5 on which the movable mold 5 is mounted.
It is connected to a moving mechanism (not shown) through a, reciprocates in the direction of the fixed mold 6 attached to the mold plate 6a, and closes the fixed mold 6 to perform mold clamping. This movable mold 5
, A cylinder 7 penetrates in the front-rear direction, and a penetrating end thereof opens to the cavity 4. A pressurizing plunger 8 is inserted into the cylinder 7 so as to be reciprocally movable. The pressurizing plunger 8 reciprocates while being connected to the rod of the pressurizing means 8b. An amorphous alloy material 9 having a supercooled liquid region which is a constituent material of the connecting member 2 is set in the cylinder 7 closer to the fixed die 4 than the pressurizing plunger 8.

The mold 3 is provided with a heater 10 and a temperature detector (not shown). The heater 10 is disposed around the cylinder 7 in the movable mold 5 and in the vicinity of the cavity 4 in the fixed mold 6, and heats the cylinder 7, the pressure plunger 8, and the vicinity of the cavity 4. The applied voltage of the heater 10 is controlled by a temperature controller (not shown) to which the temperature detected by the temperature detector is input, so that the temperature of the above-described portion can be accurately controlled. Further, a cooling pipe (not shown) is provided inside the mold 3.
Are arranged so that the entire mold 3 is cooled. The surface of the cavity 4 and the pressing portion 8a of the pressing plunger 8 are mirror-finished so that the surface roughness Rmax is 0.8 μm.

The wire-like members 1a and 1b are provided with clamps 11a and 11
b, the ends 1a 'and 1b' are positioned coaxially and opposed by wire guide grooves 4a and 4b communicating with the cavity 4, and are installed so as to protrude into the cavity 4. The wire-like members 1a and 1b are made by twisting 20 stainless steel wires made of SUS304 having a wire diameter of 20 μm, and have an outer diameter of 0.3 mm. The inner diameter of the cavity 4 is 0.34 mm, and the thickness of the amorphous alloy formed on the ends 1a ', 1b' of the wire-like members 1a, 1b is 0.02 mm. In addition,
The wire members 1a and 1b are separated by 0.5 mm.

As the amorphous alloy material 9, Zr ₅₅
A Cu ₃₀ Al ₁₀ Ni ₅ (subscript indicates atomic%) alloy is used. This material has a glass transition temperature Tg = 420
° C, the crystallization onset temperature Tx = 500 ° C, and in the supercooled liquid region ΔT (= Tx-Tg) 80 ° C between them,
Viscous fluid with viscosity of about 10 ⁹ Pa · s, several tens of MP
It has the property that it can be easily molded at a low pressure of about a. The vacuum chamber that houses the entire mold 3 is connected to a vacuum pump (not shown) and an inert gas cylinder (not shown), and can be in a vacuum atmosphere or an inert gas atmosphere. Further, a portion of the mold 3 that comes into contact with the amorphous alloy material 9 is a mirror surface having a surface roughness of Rmax = 1.2 μm or less. If the surface roughness exceeds 1.2 μm, it is difficult to release the formed connecting member 2 from the molding die 3.

Next, a manufacturing procedure according to this embodiment will be described. The wire members 1a, 1b manufactured in advance are held by clamps 11a, 11b, and the end portions 1a ', 1b are held.
b ′ is protruded into the cavity 4 and installed at a position coaxially opposed, and the movable mold 5 is moved to perform mold clamping.
On the other hand, the amorphous alloy material 9 is placed in the cylinder 7. Then, the inside of the vacuum chamber (not shown) is replaced with an inert gas, and the entire mold 3 is set to an inert atmosphere.
In the present embodiment, argon gas is used as the inert gas.

After the above arrangement, the heater 1
With 0, the mold 3 is heated to 420 ° C. or more and 500 ° C. or less, which is the supercooled liquid region of the amorphous alloy material 9. In this embodiment, the heating temperature is 460 ° C. ± 5 ° C. The amorphous alloy material 9 is heated by heat conduction from the mold 3 and becomes a viscous fluid when it reaches the supercooled liquid region. In this state, the amorphous alloy material 9 is pressed by the pressurizing plunger 8 and enters the cavity 4 through the cylinder 7. inject. The injection pressure was set at about 10 MPa. At this time, by heating the pressurizing plunger 8 and the mold 3 to the supercooled liquid region, the amorphous alloy material 9 can be easily injected into the cavity 4 without solidifying.

The injected amorphous alloy material 9 is formed according to the shape of the cavity 4 and enters the gap between the wires of the wire-like members 1a and 1b. Thereafter, by cooling the mold 3, the connecting member 2 and the wire-like members 1a and 1b are integrated. Cooling is performed so as to be equal to or lower than the glass transition temperature from the supercooled liquid region, and the cooling rate is desirably rapidly cooled in order to prevent embrittlement. In the present embodiment, ripening was stopped, and cooling water was circulated through the cooling pipe to cool at a cooling rate of 50 ° C./min. Note that the cooling rate may be higher. Since the amorphous alloy material family 9 crystallizes and becomes brittle when held in the supercooled liquid region for a long time, it is desirable that the amorphous alloy material 9 be rapidly formed and cooled after being heated to the supercooled liquid region. In the present embodiment, the molding time in the supercooled liquid region was within 3 minutes. In this case, the portion of the mold 3 that contacts the amorphous alloy material 9 is Rmax =
Since it is mirror-finished to 1.2 μm or less, it is not joined to the amorphous alloy material 9. By such a method, a composite member including the wire-like members 1a and 1b and the connecting member 2 can be obtained.

The present embodiment as described above has the following effects. That is, in the conventional insert molding method, since the molding material family is limited to light alloy materials, it cannot be applied to members requiring high strength, but in this embodiment, a connecting member is formed. Since the mechanical strength of the amorphous alloy material is high, the molding temperature is lower than the melting point of the light alloy material, and the deterioration due to the thermal influence of the base material is small, a high strength composite member can be obtained.

In welding, dimensional accuracy is deteriorated due to welding distortion. However, since the base material can be integrated without melting, there is no distortion due to solidification shrinkage, and thus high dimensional accuracy can be obtained. Further, the amorphous alloy material enters the gap between the wires of the wire-like member and fills the gap, so that the bonding area between the wire-like members 1a and 1b and the connecting member 2 increases, and the wire-like member is firmly connected. At the same time, the effect of alleviating stress concentration occurs, and the fatigue strength of the joint is improved. Although SUS304 is used as the wire-like members 1a and 1b, an amorphous alloy having a supercooled liquid region may be used as the wire-like member. When an amorphous alloy having a supercooled liquid region is used for both the wire-shaped member and the connecting member, the supercooled liquid region of the wire-shaped member is more than the supercooled liquid region of the amorphous alloy of the connecting member. Use the one on the high temperature side. The composite member can be formed by setting the temperature at which the connecting member is formed to be equal to or higher than the glass transition temperature of the amorphous alloy of the connecting member and equal to or lower than the glass transition temperature of the amorphous alloy of the wire-like member.

According to the above-described structure, for example, an operation wire composed of a hand operation wire, a distal end operation wire and a connecting member of the both wires in the endoscope biopsy forceps, and a distal end operation wire in the same biopsy forceps are used. At the junction of the wire connection, the basket-type tip connection of the grasping forceps for the endoscope,
A joint between the distal coil sheath of the biopsy forceps and the proximal coil sheath, a joint between the distal coil sheath of the same forceps and the S cover, a joint between the proximal sheath of the forceps and the anti-deposition member,
The present invention can be applied to a connection portion of a high-frequency treatment tool of an endoscope treatment tool and a distal end wire of a wire knife, a connection of a leg of a tripod-type grasping forceps of the treatment tool, a connection of a high-frequency treatment tool of the treatment tool, and the like. .

(Embodiment 2) Embodiment 2 of the present invention will be described. In this embodiment, a composite member including the wire-shaped member and the connecting member shown in FIG. 1 is manufactured by a method different from that of the first embodiment, and the apparatus is shown in FIG. FIG. 3 is a longitudinal sectional view in a state where the wire-shaped member extends in a direction perpendicular to the paper surface.

In FIG. 3, a long body mold 12 is placed on a gantry 15 in a direction perpendicular to the paper surface, and an upper mold 13 and a lower mold 14 are provided on the body mold 12. The lower mold 14 is attached to a concave portion of the gantry 15 facing the body mold 12,
3 is inserted into the upper part of the body mold 12 and faces the lower mold 14. The lower die 14 is provided with a lower die groove 14a for installing a U-shaped preformed body 16 as shown in FIG.

The upper die 13 also has a pair of upper die grooves 13a.
Is provided, and the cavity formed when the upper mold 13 is brought into contact with the lower mold 14 has the shape of the connecting member 2. The surfaces of the lower mold groove 14a and the upper mold groove 13a in contact with the preform 16 are
It is mirror-finished to Rmax = 0.85 μm.

FIG. 4 shows a preformed body 16 and a wire-like member.
1a, 1b, showing a U-shaped preform
The wire-like members 1a and 1b are abutted on the bottom of 16
So that they are coaxial and opposing. This wire shape
The members 1a and 1b are held by clamps (not shown).
It is fixed. Also, the width W of the preformed body 16
Is equal to the diameter of the wire-like members 1a and 1b.
Its thickness is 0.5 mm. These materials are
As in the first embodiment, the wire-like members 1a and 1b
It is a strand of SUS304. On the other hand,
Form 16 is Zr ₅₅Cu₃₀Al_TenNi_Five(Subscript is atom
%) Zr-based amorphous alloy material
The same glass transition temperature Tg and crystallization onset temperature Tx as in state 1.
And a supercooled liquid region ΔT.

As shown in FIG. 3, the upper die 13 is attached to a pressure plunger 17 connected to a pressure mechanism (not shown) so that it can move vertically along the inner surface of the body die 12. It has become. The body mold 12 is provided with a high-temperature gas inlet 12a for introducing a high-temperature gas from a high-temperature gas generator (not shown) into the body, and an exhaust port 12b for exhausting the gas. Body mold 12, Upper mold 13
And the lower mold 14 have heaters 10a, 10b, respectively.
10c and a temperature detector (not shown) are provided, and the heaters 10a, 10b, and 10c are controlled by a temperature controller so that the temperatures in the upper and lower dies 13, 14 and the body die 12 can be accurately controlled. Is configured.

Further, the upper mold 13 and the lower mold 14 are provided with cooling pipes (not shown) so that the upper mold 13 and the lower mold 14 can be cooled appropriately. The above apparatus is installed in a vacuum chamber (not shown), and is connected to a vacuum pump (not shown) and an inert gas cylinder (not shown) to make a vacuum atmosphere or an inert gas atmosphere. Is possible.

In this embodiment, as shown in FIGS. 3 and 4, after the preform 16 and the wire-like members 1a and 1b are arranged, the argon gas heated to about 430 ° C. is supplied from the high-temperature gas inlet 12a. Into the body mold 12,
The body mold 12, upper mold 13 and lower mold 14 are heated to about 430 ° C. by the heaters 10a, 10b and 10c. Thus, the preformed body 16 is heated to the supercooled liquid region by heat conduction from the lower mold 14 and the argon gas. When the temperature of the preform 16 exceeds the glass transition temperature, the preform 16 is in a viscous flow state and can be easily formed at a low pressure.

In this state, the pressurizing plunger 17 is operated to lower the upper die 13 until it comes into contact with the lower die 14 as shown in FIG. As a result, the preformed body 16 is deformed following the upper mold groove 13a, is formed into the shape of the connecting member 2, and is in close contact with the wire members 1a, 1b, so that the wire members 1a, 1b are joined. The moving speed of the upper mold 13 during molding is 100 mm / sec.

Thereafter, the heating is stopped, the upper mold 13 and the lower mold 14 are cooled to a temperature lower than the glass transition temperature by the cooling water circulated in the cooling pipe, the preform 16 is solidified, and the connecting member 2 is formed. And the connecting member 2 and the wire-like member 1a,
1b is integrated. Here, the upper mold groove 13a and the lower mold groove 14
Since the surface of a is mirror-finished, these are not joined to the preformed body 16. As described above, FIG.
The composite member in which the wire members 1a and 1b and the connecting member 2 shown in FIG.

The amorphous alloy having a supercooled liquid region including the amorphous alloy Zr ₅₅ Cu ₃₀ Al ₁₀ Ni ₅ which is a constituent material of the preformed body 16 has a crystal in proportion to the holding time in the supercooled liquid region and the temperature. The rate of temperature increase below the glass transition temperature is not particularly limited because the conversion rate increases, but it is desirable that the target temperature be quickly reached above the glass transition temperature. The same applies to the heating temperature. In order to reduce the crystallization rate, it is desirable to mold at a temperature as low as possible.

Further, since the amorphous alloy has the property of becoming brittle when the cooling rate when cooling from the supercooled liquid region to the glass transition temperature or lower is slow, it is necessary to give due consideration to the cooling rate. As described above, the mechanical properties of the amorphous alloy material having the supercooled liquid region depend on the heating, the cooling rate, and the holding time in the supercooled liquid region. However, in this embodiment, the heating rate is 50 ° C. / Min, a heating temperature of 430 ° C., a holding time in a supercooled liquid region of 200 sec, and a cooling rate of 50 ° C./min. As a result, sufficient mechanical strength could be obtained.

In such an embodiment, the first embodiment
In addition, the wire members 1a and 1b and the pre-formed body 16 are arranged along the lower die groove 14a, and the connecting member 2 is pressed by the upper die 13 and the lower die 14 to form. As a result, the wire-shaped members 1a and 1b do not shift during the molding, and the dimensions can be secured with high accuracy, and the dimensional accuracy can be secured even if the molding speed of the preform 16 is increased. Shortening becomes possible.

In this embodiment, the dies 12, 13, 14
Can be applied to the joint of the injection needle of the treatment tool for an endoscope and the joint of the tip needle of the needle-shaped high-frequency knife of the treatment tool.

(Embodiment 3) FIG. 6 shows an ultrasonic treatment device 20 for an endoscope manufactured in Embodiment 3, wherein a tool as a working member is provided at the tip of a holding member 19 held by an operator. The member 18 is provided integrally, and the tool member 18 is formed with a comb-shaped working portion 18a. This treatment tool 20
Is used for surgical procedures using an endoscope,
The working part 18a of the tool member 18 is brought into contact with the cellular tissue in the body, and ultrasonic vibration is applied to the working part 18a to destroy or remove the tissue cells.

In this embodiment, an amorphous alloy is used as a constituent material of the tool member 18. The composition of this amorphous alloy is Zr ₆₀ Cu ₃₀ Al ₁₀ (the number is atomic%), the glass transition temperature Tg = 370 ° C., the crystallization start temperature Tx = 470 ° C., and the supercooled liquid region ΔT = 100 ° C. is there.
Further, it has the property of exhibiting a viscosity of 10 ⁹ Pa · s in the supercooled liquid region. The constituent material of the holding member 19 is Ti-
6A1-4V (the number is% by mass).

FIGS. 7 and 8 show a manufacturing apparatus used in the present embodiment. A body mold 22 is installed on a gantry 21, and a lower mold 24 and an upper mold 23 face each other in the body mold 22. At the same time, the pressure plunger 26 is
Mechanism 26a (shown only on the lower side)
Is basically configured by inserting the.
A cavity 25 is formed between the upper mold 23 and the lower mold 24. The comb-shaped portion corresponding to the working portion 18a of the cavity 25 in the lower mold 24 is shown in FIGS.
Although shown radially for clear illustration, the working part 18a formed by this comb-shaped part is, as shown in FIG.
The upper die 23 and the lower die 24 are formed so as to be able to be die-cut in a vertical direction with respect to the division surface, and the same applies to the display in the following drawings.

The cavity 25 is a cavity having the same shape and dimensions as the tool member 18, and is formed when the lower mold 23 and the upper mold 24 are clamped. The lower die 23 is provided with a holding member 19 manufactured in advance. Upper mold 2
3, a cylinder part 23a is formed on the upper part,
A runner 23b that connects the cylinder portion 23a and the cavity 25 is formed. The pressurizing plunger 26 is connected to the pressurizing mechanism 26a (not shown in the whole), and is movable in the cylinder 23a of the upper die 23.

The upper mold 23, the lower mold 24, and the pressurized brand 2
6 are provided with heaters 27a, 27b, 27c and a temperature detector (not shown), respectively.
The temperature of the lower mold 24 and the pressure plunger 26 is accurately controlled. Except for the joint 19 a of the holding member 19 with the tool member 18, the surface of the cavity 25 is Rmax
= 0.8 μm. On the other hand, the joint 19a of the holding member 19 has a surface with a roughness of about Rmax = 25 μm.

The upper die 23 and the lower die 24 are provided with cooling pipes (not shown) so that they can be appropriately cooled. The whole of these devices is installed in a vacuum chamber (not shown), and is connected to a vacuum pump (not shown) and an inert gas generator (not shown) so as to be in a vacuum atmosphere or an inert gas atmosphere. It is possible to do.

In this embodiment, as shown in FIG.
The holding member 19 separately manufactured in advance is installed at a predetermined position of the lower mold 24, the mold is clamped, and the holding member 19 is fixed, and the tool member 1 of the upper mold 23, the lower mold 24, and the holding member 19 is fixed.
A cavity 25 is formed by the joint portion 19a with the substrate 8.
The surface of the joint 19a is rough as described above in order to strengthen the joint with the tool member 18 made of an amorphous alloy. An amorphous alloy material 40, which is a constituent material of the tool member 18, is placed in the cylinder 23a.

In this state, in order to prevent the tool member 18 and the holding member 19 from being oxidized, the entire apparatus is set to an argon gas atmosphere, and the upper mold 2 is heated by the heaters 27a and 27b.
3. Heat the lower mold 24 and heat the amorphous alloy material 40 to the supercooled liquid region by the heat conduction. Further, the pressurizing plunger 26 is heated by the heater 27c in the same manner as in each mold. In this embodiment, the heating is performed at a heating rate of 50 ° C./min and a heating temperature of 410 ° C. With this heating, the glass transition temperature Tg
= 370 ° C., the viscosity sharply decreases and becomes a viscous fluid.

In the state where the supercooled liquid region is completely reached to the center of the amorphous alloy material 40, the amorphous alloy material 40 which has become viscous fluid is pressurized by the pressurizing plunger 26 as shown in FIG. And into the cavity 25. Injected amorphous alloy material 40
Is filled while filling fine irregularities on the surface of the cavity 25.

Thereafter, the entire mold is cooled to a glass transition temperature Tg or lower, thereby solidifying the amorphous alloy material. At this time, since the surface of the joining portion 19a of the holding member 19 is rougher than the other surface of the cavity, the joining portion 19a and the amorphous alloy material are microscopically engaged with each other, whereby both are firmly joined. Regarding the cooling rate, as in Embodiments 1 and 2, 50 ° C./min
I went in. By such means and operation, the tool member 1
When the molding 8 is formed, the tool member 18 and the joint 19a of the holding member 19 are joined together, so that the treatment tool 20 can be manufactured. The bonding strength between the tool member 18 and the holding member 19 of the manufactured treatment tool 20 was about 500 MPa, and it was confirmed that the strength was sufficiently higher than the strength required as an ultrasonic treatment tool.

In this embodiment, the joint 19a of the holding member 19 is flat, but a hole 19b opening toward the cavity 25 may be formed in the joint 19a as shown in FIG. Further, as shown in FIG. 10, the convex portion 19c may be protruded toward the cavity 25, and as shown in FIG. 11, a convex portion 19d having a large diameter portion at the tip may be protruded. The bonding strength with the amorphous alloy material 40 is increased by the holes 19b and the projections 19c and 19d, so that the tool member 18 and the holding member 19 can be firmly integrated.

In FIGS. 7 to 11, when the comb-shaped portion of the working portion 18a of the lower mold 24 is formed radially, the lower mold 24 is divided into two parts in a direction perpendicular to the paper surface. The upper mold 23 is opposed to the lower mold 24 of the pair to form the cavity 25, and the pair of the lower mold 24 is divided after the molding of the tool member 18. It can be formed by removing the tooth-like portion.

In this embodiment, the tool member 18 is made of an amorphous alloy having a supercooled liquid region, and the holding member 19 is made of another material. It is also possible that the material of the material 19 is an amorphous alloy having a supercooled liquid region, and the tool member 18 is made of another material. Further, both the tool member 18 and the holding member 19 may be two kinds of amorphous alloys having a supercooled liquid region in which the temperature of the supercooled liquid region is different.

In the conventional manufacturing method, the holding member and the tool member are separately manufactured, and these are integrated by joining means such as welding or silver brazing. In welding, there were problems such as deterioration of dimensional accuracy due to distortion due to solidification shrinkage of the base material and reduction in strength due to deterioration of the heat-affected zone. Also, in brazing, the heating temperature is 750 ° C. or higher, and there has been a problem that the strength is reduced due to the deterioration of the thermal effect due to heating.
Further, these problems have a greater effect as the bonding area decreases, and thus there is a limit to miniaturization of the composite member. On the other hand, in this embodiment, the molding temperature is as low as 410 ° C. and there is no melting and solidification, so that the deterioration of the base material due to heat is small, and since there is no distortion due to solidification shrinkage, high strength and high precision The two members can be integrated. Such an embodiment can be applied to the integrated production of a needle of a forceps with a needle in a biopsy forceps for an endoscope and a needle locking pin for positioning the needle by changing the mold. it can.

(Embodiment 4) FIG. 12 is a schematic view of a node ring 28 of a bending tube for an endoscope manufactured according to Embodiment 4. The node 28 is one of the components of the bending portion of the endoscope, and includes a guide ring 30 for inserting an operation wire, and a node ring to which the outer peripheral surface of the guide ring 30 is fixed to the inner peripheral surface. It comprises a main body 29. In addition, two or four guide rings 30 are generally fixed to the inner peripheral surface of the node ring body 29 at symmetrical positions. In this embodiment, it is assumed that one or more guide rings 30 are sequentially fixed. Because,
Only one is shown. The guide ring 30 has an outer diameter of φ1
It is a ring-shaped member having a diameter of 0.9 mm and an inner diameter of 0.9 mm, and has an insertion port 30a through which an operation wire is inserted. The node ring body 29 is made of SUS304 material and has an outer diameter of φ11.8.
mm, and a pipe-shaped member having a wall thickness of 0.4 mm.

FIGS. 13 to 16 show a manufacturing apparatus used in the present embodiment. The cavity 37 is formed by clamping the lower die 31 and the upper die 32. A lower punch 35 and an upper punch 33 are inserted into the lower die 31 and the upper die 32 facing the cavity 37, respectively.
Also, the lower punch 35 and the upper punch 33 have a middle punch 3 therein.
6, 34 are inserted respectively. The above lower mold 31,
The upper die 32, the lower punch 35, the upper punch 33, and the respective middle punches 36, 34 are connected to separate driving systems (not shown), and each member is driven independently.

As shown in FIG. 13, the lower mold 31 has a concave portion 31a in which the node ring main body 29 can be stored, and has a space in which the lower punch 35 can slide. The outer diameter of the middle punches 34 and 36 is the same as the inner diameter of the guide ring 30.

The above dies 31, 32, punches 33, 34,
The heaters 35 and 36 are provided with a heater (not shown), a cooling water pipe (not shown), and a temperature detector (not shown) so that they can be heated and cooled.

The surface of the cavity 37 has an Rmax = 0.
Finished to a surface roughness of about 8 μm. The molding surfaces, which are the respective end surfaces of the punches 33, 34, 35, 36, and the surface in the vicinity thereof are also processed to Rmax = about 0.8 μm. The surface roughness of the guide ring joint 29a of the node ring main body 29 is about Rmax = 25 μm. In FIG. 13, reference numeral 38 denotes a preformed body of the guide ring 30,
_{Pd 40 0Ni 10 Cu 30 P 20} ( subscripts indicate atomic%) made of amorphous alloy having a supercooled liquid region of the glass transition temperature Tg = 302 ° C., the crystallization starting temperature Tx = 39
At 7 ° C., in the supercooled liquid region ΔT = 302 ° C. to 397 ° C., the viscosity becomes 10 ⁹ Pa · s, and has the property of being a viscous fluid. Also, this material is an oxidation resistant material,
Not oxidized when heated in air.

In this embodiment, a separately formed node ring main body 29 and a preformed body 38 made of a previously manufactured amorphous alloy material are placed in a cavity 37 of a lower die 31 as shown in FIG. The mold clamping of the upper mold 31 and the upper mold 32 is performed. Heater lower die 31, upper die 32 and upper punch 3 by heater
All the punches such as 3 are heated to 350 ° C., and the preformed body 38 is heated by heat conduction from the mold and the punch, and becomes a viscous fluid when the glass transition temperature Tg = 302 ° C. is reached.

With the entire pre-formed body 38 reaching the supercooled liquid region, as shown in FIG.
And the lower punch 35 and the middle punch 36,
8 is pressed at 2 MPa to form the outer shape of the guide ring 30. At this time, the preformed body 38 is connected to the joint portion 29a of the node ring body.
It is molded while filling the micro unevenness of the surface of the. Thereafter, as shown in FIG. 15, the middle punch 34 and the middle punch 3
The wire insertion port 30a is formed by lowering 6 in conjunction with it and punching out the pre-formed body. The punching speed is
It is performed at 200 mm / sec. Punching is a medium punch 34
This is performed by a shearing force between the upper punch 35 and the lower punch 35. However, since the pre-formed body 38 is a viscous fluid, a crack is not generated during the shearing, and a good shear surface is obtained. After punching out the wire insertion port 30a, each mold and each punch are cooled to a glass transition temperature or less, the amorphous alloy material is solidified, and the guide ring 30 and the transfer main body 29 are joined while forming the guide ring 30. Thereafter, as shown in FIG.
2. Raise the upper punch 33 and the upper middle punch, and save 28
Take out.

The guide ring 30 is made of an amorphous alloy having a supercooled liquid region, and is molded and integrated with the transfer main body 29. However, by changing the forming device, the guide ring 30 is superposed. It is also possible to form an amorphous alloy having a cooling liquid region, and to mold this and integrate it with the guide ring 30.

Conventionally, the node ring body and the ring guide were separately manufactured, and these were joined by brazing or welding to manufacture the node ring. However, the base material due to distortion due to solidification shrinkage and heat influence. There was a problem such as deterioration of In addition, the casting method using a light alloy or resin cannot be applied because the strength of the material is insufficient. In the embodiment, the heating temperature is 350 ° C., which is lower than that of welding or brazing, and does not involve melting of the base material, so that there is no distortion due to solidification shrinkage, and deterioration of the base material due to thermal effects can be reduced. Furthermore, since the ring insertion opening is manufactured by punching during molding, the preformed body may have a simple shape, and the manufacturing process of the preformed body can be simplified.

From the above description, the present invention includes the following inventions. (1) A method in which two or more members are integrated by molding, wherein at least one member integrated with another member or at least one member integrated with two or more other members is a supercooled liquid region. The other member is a wire-shaped member, and one member and the other member are heated to the temperature of the supercooled liquid region, and are pressed and molded by a molding die to form the one member and the other member. Integrate with the members of
Thereafter, the method for manufacturing a composite member is characterized by cooling.

(2) A method in which two or more members including a working member and a holding member for holding the working member are integrated by molding, wherein one or both of the working member and the holding member are integrated. A composite member made of an amorphous alloy having a supercooled liquid region, heating the working member and the holding member to the temperature of the supercooled liquid region, press-molding and integrating with a molding die, and then cooling. Production method.

(3) A method in which two or more members consisting of one ring-shaped member and another ring-shaped member joined to the inner or outer periphery of the one ring-shaped member are integrated by molding. One of the ring-shaped member and the other ring-shaped member is made of an amorphous alloy having a supercooled liquid region, and these ring-shaped members are heated to the temperature of the supercooled liquid region, and are press-formed by a molding die. A composite member, and then cooling.

(4) The surface roughness of the contact surface of the mold with the amorphous alloy is Rmax = 1.2 μm.
m. The method for producing a composite member according to any one of the above (1) to (3), wherein m is equal to or less than m.

(5) The above-described (1) to (3), wherein a member having a surface roughness Rmax = 10 μm or more in contact with the amorphous alloy is integrated with a member made of an amorphous alloy. The method for producing a composite member according to any one of the above items.

(6) A composite member manufactured by the method according to any one of the above (1) to (5).

[0086]

According to the first aspect of the present invention, at least one of the members to be integrated is made of an amorphous alloy having a supercooled liquid region. It can be a composite member. Further, since the heating temperature for the integration is low and there is no deterioration due to the heat effect, the strength can be increased, and the composite member can be firmly integrated by engaging with other members.

According to the composite member of the second aspect, since at least one member is made of an amorphous alloy, the amorphous member has high strength and durability due to hardness, and
High form accuracy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a composite member manufactured according to Embodiments 1 and 2. FIG.

FIG. 2 is a cross-sectional view of the manufacturing apparatus used in the first embodiment.

FIG. 3 is a sectional view of a manufacturing apparatus used in a second embodiment.

FIG. 4 is a perspective view of a member in the process of manufacture according to a second embodiment.

FIG. 5 is a cross-sectional view showing a manufacturing process according to the second embodiment.

FIG. 6 is a perspective view of a composite member manufactured according to a third embodiment.

FIG. 7 is a sectional view of a manufacturing apparatus used in a third embodiment.

FIG. 8 is a sectional view showing the manufacture of the third embodiment.

FIG. 9 is a cross-sectional view showing a first modification of the third embodiment.

FIG. 10 is a sectional view showing a second modification of the third embodiment.

FIG. 11 is a sectional view showing a third modification of the third embodiment.

FIG. 12 is a perspective view of a composite member manufactured according to a fourth embodiment.

FIG. 13 is a sectional view of a manufacturing apparatus used in the fourth embodiment.

FIG. 14 is a cross-sectional view of a stage of joining the ring-shaped members according to the fourth embodiment.

FIG. 15 is a cross-sectional view of a step of manufacturing the ring-shaped member according to the fourth embodiment.

FIG. 16 is a cross-sectional view showing a stage after bonding according to the fourth embodiment.

[Explanation of symbols]

 1a 1b Wire-like member 2 Connecting member 3 Mold 4 Cavity 5 Movable mold 6 Fixed mold 7 Cylinder 8 Pressure plunger 9 Amorphous alloy material

Claims (2)

[Claims] 1. A method of integrating two or more members by molding, wherein at least one member integrated with another member or at least one member integrating two or more other members is supercooled. Made of an amorphous alloy having a liquid region, heating this one member and the other member to the temperature of the supercooled liquid region,
A method for producing a composite member, wherein one member and another member are integrated by press molding with a molding die, and then cooled. At least one member integrated with another member or at least one member integrated with two or more other members is made of an amorphous alloy having a supercooled liquid region, and one member and another member are integrated. A composite member, wherein the member is heated to the temperature of the supercooled liquid container, pressed and integrated by a molding die, and then cooled to be molded.