JP2002097532A - Method for manufacturing composite molded article of metal and ceramics, and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a composite molded article of metal and ceramics without using a die, by simultaneous molding and sintering, and an apparatus for the same. SOLUTION: This method for manufacturing the composite molded body 31 consisting of metal with dispersed ceramics therein comprises, mounting a tape 1 of molded fine ceramics powder on a substrate 7, laying a tape 2 of molded fine metal powder on the tape 1, melting the tape of the molded fine metal powder by means of irradiating and controlling a laser light 35 on the top face so as to make a configuration of the cross-section of the manufactured composite molded article, and repeating these process once or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a composite molded body of metal and ceramic, and more particularly, to a tape formed of ceramic fine powder and a tape formed of metal fine powder alternately irradiated with laser light. The present invention relates to a method and an apparatus for producing a composite molded body of metal and ceramics by melting a metal fine powder with a laser beam.

[0002]

2. Description of the Related Art Conventionally, a composite molded body of metal and ceramics is formed by various methods such as mixing a metal fine powder and a ceramic fine powder with a lubricant, mixing the mixture into a mold and molding. It is manufactured by sintering. In this method, it is necessary to uniformly mix the metal fine powder and the ceramic fine powder, but it is necessary to stir for a long time because the specific gravity of the fine powder is different, and also requires a mold for molding, The cost and time required to manufacture the molds are disadvantageous, so that small-scale production or production of prototypes is costly and time-consuming.

Further, as a method of molding without using a mold, a light energy required for curing by a laser beam is supplied to a photocurable fluid resin or a photocurable fluid resin in which silica powder is dispersed. Japanese Patent Application Laid-Open No. 60-247515 or Japanese Patent Application Laid-Open No. H08-247, discloses a method of selectively supplying the light energy by a position control device or the like to produce a resin molded body having a desired shape or a resin molded body containing silica powder.
No. 25486.

[0004] As a method of manufacturing a sintered body without using a mold, a sinterable (sintering) inorganic material powder is mixed in a photocurable fluid resin, and the inorganic material powder is mixed. A photocurable layer is formed by irradiating a light image to the layer of the photocurable fluid resin that has been formed, and the cured layers are sequentially stacked to form a three-dimensional molded body. Japanese Patent Application Laid-Open No. Hei 8-252678 discloses that an inorganic material powder-mixed molded body from which components are removed and a resin component is removed is made into a sintered body by HIP processing or the like.

[0005]

The method disclosed in the above publication discloses an inorganic material powder for producing a resin molded body having a desired shape, a resin molded body containing silica powder or a sintered body without using a mold. This is a method for producing a resin molded body containing a resin, but not both a method for producing a composite produced using two types of tapes, and a method for producing a resin molded body containing an inorganic material powder for producing a sintered body In this method, the molding and the sintering are performed separately, and not simultaneously, so that it is necessary to separately perform sintering after the molding. SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for manufacturing a composite molded body of metal and ceramics, which can simultaneously perform molding and sintering of a composite of metal and ceramics without using a mold. It is.

In order to solve the above-mentioned problems, in the method for producing a composite molded body of metal and ceramic according to the present invention, a tape formed by molding ceramic fine powder, a so-called green tape, is placed on a substrate, and the metal fine powder is placed thereon. A green molded tape, a so-called green tape, is superimposed and pressed together as necessary, and the cross-sectional shape (cut horizontally) of the composite molded body to be manufactured is cut on the upper surface of the tape molded with the fine metal powder. Laser light so that the surface becomes the same as that of the computer-assisted design (CA
D) By controlling and irradiating the laser beam according to the data, the tape formed of the metal fine powder is melted so as to have the cross-sectional shape of the composite molded body to be manufactured therefrom, and the ceramic fine powder of the tape formed of the ceramic fine powder is melted. It is combined with the body, and these are repeated once or more than two times to form a composite molded body in which ceramics are dispersed in metal, and the fine metal powder and ceramic fine powder of the tape where laser light has not been irradiated are removed. It is to make a composite shaped body of metal and ceramics by removing.

In order to solve the above-mentioned problems, in the method for producing a composite molded body of metal and ceramic according to the present invention, the composite molded body for producing a tape formed by molding metal fine powder by the above method is melted into a cross-sectional shape. The ceramic fine powder is combined with the ceramic fine powder of the molded tape, and in the course of these operations, when the metal fine powder is melted and the volume is reduced, the ceramic fine powder or the metal fine powder is supplied, and the fine metal powder is supplied to the metal fine powder. The object of the present invention is to produce a composite molded body in which ceramics are dispersed in a metal by melting a metal fine powder by controlling and irradiating a laser beam, and repeating these steps repeatedly.

Further, in the method for producing a composite molded body of metal and ceramic according to the present invention, the tape obtained by molding the ceramic fine powder is mixed with an organic binder such as an alkali salt of silicic acid and mixed with the ceramic fine powder. Using a reinforcing tape such as paper, the mixture obtained by mixing the organic binder or the mixture and the reinforcing tape are rolled with a compression roll, and when the reinforcing tape is used, the reinforcing tape shall be manufactured by peeling off the reinforcing tape, and The tape obtained by molding the above-mentioned metal fine powder, a metal fine powder mixed with an organic binder such as an alkali salt of silicic acid, and a reinforcing tape such as paper is used as necessary, and a mixture obtained by mixing the organic binder or the mixture and the reinforcing tape Rolled with a compression roll, and when a reinforcing tape is used, it is manufactured by peeling off the reinforcing tape. Is Rukoto.

In the method for producing a composite shaped body of metal and ceramic according to the present invention, the ceramic fine powder may be made of a metal oxide such as Al ₂ O ₃ , a metal nitride such as cBN, a metal carbide such as TiC or the like. One or two selected from fine powders of carbon isotopes such as diamond
Or more of the above-mentioned metal fine powders, and among the fine powders of metals of the VIII group such as Fe and Ib group such as Cu of the periodic table and those obtained by alloying other metals as alloying components with these metals. Or two or more selected from the group consisting of:

[0010] In the apparatus for manufacturing a composite molded body of metal and ceramics according to the present invention, a laser beam irradiating apparatus electrically connected to a control unit for controlling based on computer aided design (CAD) data; A laser light generator that supplies laser light to a light irradiation device, a substrate driving device, and a tape supply device that intermittently supplies both a tape formed of ceramic fine powder and a tape formed of metal fine powder. It is to be.

Further, in the apparatus for manufacturing a composite molded body of metal and ceramic according to the present invention, the substrate 7 supporting the tape formed of ceramic fine powder and the tape formed of metal fine powder and capable of moving up and down. A tape supply device 9 for intermittently supplying a tape formed of the ceramic fine powder and a tape formed of the metal fine powder on the substrate 7; and a tape 1 or a metal formed of the substrate 7 formed of the ceramic fine powder. A movable platform 8 that can be lowered and raised in accordance with the thickness of the tape 2 on which the fine powder is formed, and a composite molded body that manufactures a tape on which the metal fine powder is mounted placed on the substrate 7 A laser light irradiation device 11 such as a device made of a carbano mirror that melts so as to have a cross-sectional shape of a laser beam, and a laser beam is supplied to the laser light irradiation device. Laser light generating apparatus 10a for, 10
b, a computer 12 for controlling at least the laser beam irradiating device by computer aided design (CAD) data or the like, and an atmosphere adjusting device 26 if necessary.
That is, a level roller 19, a ceramic fine powder or metal fine powder supply device and the like are provided.

[0012]

According to the method and apparatus for producing a composite molded body of metal and ceramics of the present invention, a tape formed of a metal fine powder is melted so as to have a cross-sectional shape of the composite molded body to be produced therefrom. Therefore, the shape can be maintained even when the metal fine powder is melted, and the molten metal in which the metal fine powder has melted penetrates into the ceramics, unlike the conventional one having a void as shown in FIG. As shown in FIG. 1b, it is possible to manufacture a composite molded body of a high density ceramic having no voids.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for producing a composite molded body of a metal and a ceramic according to the present invention will be described in detail with reference to FIGS. FIG. 2 is a conceptual view showing the state of a composite molded body of metal and ceramics as produced by the production method of the present invention, a tape formed of non-sintered ceramic fine powder, and a tape formed of metal fine powder. FIG. 3 is a schematic front view of an embodiment of an apparatus for producing a composite molded body of metal and ceramics according to the present invention, and FIG. 4 is a tape and metal formed of ceramic fine powder used in the production method of the present invention. It is a conceptual diagram of the apparatus used for manufacturing the tape which formed the fine powder.

[0014] The composite molding of the metal and ceramics of the present invention
The manufacturing method of
Placed on a substrate (see reference numeral 7 in FIG. 3), and a metal
Lay the tape on which the fine powder is formed, and level
Press the two together with a roller or the like to bring them into close contact.
Composite molding to be manufactured on the upper surface of the tape that molded the body
Controlling and irradiating laser light so that it has a cross-sectional shape of the body
By melting the tape formed of metal fine powder by
These are repeated once or more than two times to obtain a thick composite
When manufacturing a shaped body, the fine metal powder is melted and
Ceramic fine powder or metal fine powder
And irradiating the metal fine powder by controlling the laser beam.
Melting by this, the volume reduced by this
As shown in Fig. 2, ceramic is dispersed in metal
Is a method of manufacturing a composite shaped body
The ceramic used for the powder molded tape is Al_Two
O _Three, TiO_Two, ZrO_TwoMetal oxides such as cBN,
Si_ThreeN_Four, TiN and other metal nitrides, TiC, WC,
Metal carbides such as TaC, (W, Ti) C and diamond
One or more of carbon isotopes such as mond
is there. The size of these ceramic fine powders is 4
It is preferably 0 μm or less. If it is larger than 40μm, it will be tape
Because it is difficult to do.

Further, the metal of the metal fine powder used in the present invention is selected from the group VIII and C such as Fe, Co and Ni in the periodic table.
One or more of metals belonging to the group Ib such as u and Ag and alloys based on these metals. When two or more metals are used, it is preferable to use a low melting point alloy such as a Ni-B alloy as one of the metals. The size of the fine powder of these metals or alloys is preferably 40 μm or less. If it is larger than 40 μm, the metal fine powder does not melt sufficiently, and the structure of the composite molded body is not uniform.

The tape formed of ceramic fine powder or metal fine powder used in the present invention, a so-called green tape (see reference numerals 1 and 2 in the figure) usually has a thickness of 200 to 6 mm.
About 10 to 30% by volume of the organic binder 5 is mixed with the ceramic fine powder 3 or the metal fine powder 4 and put into the hopper 13. It is manufactured by supplying the above mixture from the hopper 13 and rolling.

If the tape formed of the fine ceramic powder or fine metal powder is likely to be damaged during winding or feeding, as shown in FIG. 4, reinforcing tape such as paper, cloth or plastic tape is used. A ceramic fine powder or a metal fine powder mixed with an organic binder was placed on a tape 14, and both were rolled simultaneously by two opposing compression rolls 15, and then the reinforcing tape 14 was peeled off. Things. Tapes formed from these ceramic or metal fine powders can be wound into rolls, or cut to the required size according to the size of the composite molded body to be manufactured. it can. When using this reinforcing tape, if there is a risk that the tape formed of ceramic fine powder or metal fine powder may adhere to each other when the reinforcing tape is peeled off, keep the reinforcing tape in close contact and place the ceramic tape on the substrate or on the substrate. When supplying the fine powder or the metal fine powder onto the formed tape, the reinforcing tape may be peeled off and supplied. In FIG. 2, reference numeral 16 denotes a reinforcing tape guide roll, and reference numerals 17 and 18 denote tape winding rolls for winding a tape formed of ceramic fine powder or metal fine powder.

The method for producing a composite shaped body of metal and ceramic according to the present invention is characterized in that when the fine metal powder is melted and the volume is reduced, the fine ceramic powder or fine metal powder, that is, only the fine ceramic powder, only the fine metal powder, A fine powder supply nozzle (Fig. 3, 2)
0, 21) and the like, and the metal fine powder is irradiated with a laser beam to be melted to compensate for the decrease in volume. It can be carried out every time, or it can be carried out after irradiating the metal fine powder with laser light for melting a plurality of times. The supplied ceramic fine powder and metal fine powder are
It is supplied so as to form a layer so as to have the same composition as the composition of the composite molded body to be manufactured. It is preferable that the amount is such that the metal fine powder becomes substantially horizontal when it is melted.

The organic binder used to form the tape formed from the ceramic fine powder or the metal fine powder is, for example, an alkali salt of silicic acid, talc boric acid, a sodium salt of alginic acid, or glycerin.

In the method of manufacturing a composite molded body of metal and ceramic according to the present invention, the tape 1 formed of the ceramic fine powder and the tape 2 formed of the metal fine powder are placed on a substrate 7 on which the substrate is placed. Fig. 3
Rewind the tape 1 formed of ceramic fine powder from the tape winding rolls 17 and 18 as shown in
Cutting by 25, placing on a substrate 7, cutting a tape 1 formed of ceramic fine powder and the like into a predetermined length, stacking them, and extruding from them, or transporting them by suction, etc. There is. In this case, the tape 1 formed of the ceramic fine powder and the tape 2 formed of the metal fine powder can be individually supplied and placed, or the metal fine powder can be placed on the tape 1 formed of the ceramic fine powder. The formed tapes 2 can be supplied in an overlapping manner and placed.

In the method for producing a composite molded body of metal and ceramics according to the present invention, a tape formed of ceramic fine powder is placed on a substrate, and a tape formed of metal fine powder is superposed on the tape. When placing a tape on which a new ceramic or metal fine powder is formed on a tape on which a ceramic or metal fine powder is already placed, make sure that it is in close contact with the lower one. Since it is necessary, it is preferable to press and adhere with a level roller (see 19 in FIG. 3).

The substrate 7 (see FIG. 3) on which the tape formed by molding the ceramic or metal fine powder is made of metal or ceramic. When the substrate is made of metal, steel is preferable because of its strength, heat resistance, low cost, and the like, but care must be taken because it may be joined to the formed composite body. When the substrate is made of ceramics, it can be easily separated because it is not bonded to the formed composite object.

According to the method for producing a composite molded body of metal and ceramics of the present invention, a tape formed of metal fine powder is placed on a tape formed of ceramic fine powder, and if necessary, both are pressed so as to adhere to each other. By controlling and irradiating the laser beam so that the cross-sectional shape of the composite model to be manufactured is melted, the tape formed from the metal fine powder is melted to disperse the ceramics in the metal. In order to irradiate a laser beam so as to have a cross-sectional shape, a drawing of a three-dimensional composite molded body to be manufactured is input to a three-dimensional CAD, and a predetermined thickness (ceramic fine powder) is applied to the three-dimensional composite molded body. ) To create a horizontal slice pattern data group of (thickness of the tape molded with + thickness of the tape molded of fine metal powder) and input this data to the computer. After irradiating the laser beam according to the slice pattern data of above, and further placing a tape formed of ceramic fine powder and a tape forming metal fine powder thereon, the laser light is irradiated according to the slice figure data following the above slice figure data. However, this can be performed by sequentially repeating this.

In the method of manufacturing a composite molded body of metal and ceramic according to the present invention, the method of irradiating a laser beam so as to have a cross-sectional shape of the composite molded body to be produced includes a tape formed of ceramic fine powder. A method in which the substrate on which the tape on which the metal fine powder is formed is placed is moved in the cross-sectional shape (in the XY axis direction) of the composite molded body to be manufactured (in this case, the thickness of the tape on which the laser light is usually formed by the laser light is usually used). + A method of moving the laser beam in the cross-sectional shape (XY-axis direction) of the composite object to be manufactured (in this case, usually, the substrate is made of ceramic fine powder). (The thickness of the tape on which the body is formed + the thickness of the tape on which the metal fine powder is formed is lowered).

In the method for producing a composite molded body of metal and ceramic according to the present invention, a tape formed of ceramic fine powder and a tape formed of metal fine powder are continuously supplied and pressed by a level roller or the like so as to be in close contact with each other. Since it is necessary that the height of the surface for supplying a tape formed of a metal fine powder or the like be constant, it is preferable that the substrate is formed of the thickness of the tape formed of the ceramic fine powder + the tape formed of the metal fine powder. It is appropriate to lower the laser beam by the thickness of the laser beam and move the laser beam in the cross-sectional shape (XY-axis direction) of the composite object to be manufactured. In addition, the drawing of the three-dimensional composite molded body to be manufactured is input to the three-dimensional CAD, and the thickness of the tape (the thickness of the ceramic fine powder molded + the metal fine powder molded) is added to the three-dimensional composite molded body at a predetermined thickness. A method of creating a horizontal slice pattern data group of (thickness of the tape) and irradiating a laser beam with the slice pattern data is a known method as disclosed in the above-mentioned Japanese Patent Application Laid-Open No. H8-252867. is there.

The method for producing a composite molded body of metal and ceramics according to the present invention comprises the steps of continuously supplying a tape formed of ceramic fine powder and a tape formed of metal fine powder as described above, and irradiating a laser beam therefrom. When the process is repeated until the height (thickness) of the composite shaped body to be formed is reached, the tape is formed into a tape formed of unsintered ceramic fine powder and a tape formed of metal fine powder (green tape). The combined composite object is in a formed state.
In such a state, the tape formed of the ceramic fine powder that has not been sintered and the tape formed of the metal fine powder (green tape) act as a support for the composite molded body formed. Less deformation,
A composite object with high precision is formed.

The tape formed of the non-sintered ceramic fine powder and the tape formed of the metal fine powder (green tape), which are the supports of the formed composite formed body, can be easily prepared by hand. Can be removed.
Further, by heating to a temperature of 200 to 300 ° C. at which the organic binder is volatilized, the tape formed of ceramic fine powder and the tape formed of metal fine powder (green tape) become sandy and fluidized, which makes it easier. Can be removed.

Next, an embodiment of an apparatus for producing a composite molded body of metal and ceramic according to the present invention will be described.

An apparatus 6 for manufacturing a composite molded body of metal and ceramics according to the present invention is a control unit (computer 12 or the like) for controlling based on computer aided design (CAD) data.
(Carabano mirror, XY drive device for laser light, etc.)
And laser light generators 10a and 10b for supplying laser light to the laser light irradiation device 11, and a substrate driving device (moving table 8)
Etc.) and a tape supply device 9 for intermittently supplying both a Lamix fine powder and a tape formed by molding a metal fine powder.

More specifically, the tape 1 formed of the ceramic fine powder or the tape 2 formed of the metal fine powder, which is manufactured by the above method and the apparatus shown in FIG. And a tape supply device 9 for intermittently supplying a tape formed of the ceramic fine powder and a tape formed of the metal fine powder on the substrate 7. The moving table 8 which can be lowered and raised in accordance with the thickness of the tape 1 formed of the ceramic fine powder or the tape 2 formed of the metal fine powder, and the metal placed on the substrate 7 Laser light irradiation device 11 such as a carbano mirror that melts the tape formed from fine powder so as to have the cross-sectional shape of the composite molded body 31 to be manufactured, and laser light generation The devices 10a and 10b, at least the laser beam irradiation device 11 are computer-aided design (C
AD) a computer 12 controlled by data, further provided with an atmosphere forming device 26 if necessary, and a ceramic fine powder supply device (not shown in the entirety in the vicinity of the laser beam irradiation device 11 as necessary). , A nozzle 20) and a metal fine powder supply device (not shown, but showing the nozzle 21), and if necessary, a level roller 19 is provided to form a composite molding. Although the body is taken out from the side surface, the substrate 7 supports a tape formed of ceramic fine powder to be supplied or a tape formed of metal fine powder and can move up and down in the holding frame 20. Is made of metal such as steel or ceramics, and has a shaft 19 for connecting to the moving table 8 fixed at a lower portion.

The moving table 8 moves the substrate 7 up and down in response to a signal from the computer 12 or the like. The thickness of the tape formed of the ceramic fine powder or the tape formed of the metal fine powder supplied on the substrate 7 is controlled. The distance corresponding to the distance is lowered, and the distance is raised when starting operation. The tape supply device 9 is rewound from a tape winding roll 17 formed of ceramic fine powder and a tape winding roll 18 formed of metal fine powder.
These tapes are intermittently supplied through the guide rolls 24 and cut by the cutter 25, and the tape formed of the cut ceramic fine powder and the tape formed of the metal fine powder are cut into storage containers. Then, the substrate 7 is sucked and transported to the substrate 7, or the substrate 7 is pushed out from below by a cylinder or the like.

The laser light generators 10a and 10b supply laser light 32 to a laser light irradiation device 11 for melting a tape formed by laminating metal fine powder, and include a laser light power supply 10a and a laser light emitting device 10b. Which is the same as a commonly used one.

The laser light irradiating device 11 irradiates the laser light generated by the laser light generating device so as to have a cross-sectional shape of a composite molded body to be manufactured therefrom. These are controlled by data, such as a carbano mirror 11 controlled by an NC device, and a lens moved by an XY driving device.

A computer 12 for controlling the movement of the laser beam irradiator 11 (carbano mirror), the moving table 8 and the like
Input the data of the thickness of the tape 1 formed of the ceramic fine powder and the thickness of the tape 2 formed of the metal fine powder, and input the drawing of the three-dimensional composite molded body to be manufactured to the three-dimensional CAD. A horizontal slice pattern data group of a certain thickness (thickness of a tape formed of ceramic fine powder + thickness of a tape formed of metal fine powder) is prepared for the three-dimensional composite molded body at a predetermined thickness. These are used to control the moving table 7 and the laser beam irradiation device 11 (carbano mirror).

A tape winding roll 17 for a tape formed of ceramic fine powder and a winding roll 18 for a tape formed of metal fine powder, which are used in the tape supply device 9,
As shown in FIG. 4, a mixture of the ceramic fine powder 3 or the metal fine powder 4 and the organic binder 5 is supplied from the hopper 13 onto the reinforcing tape 14, compressed by the rolling rolls 15, and formed. It can be manufactured by peeling off a tape or the like obtained by molding a body from a reinforcing tape and winding it up on a take-up roll.

The above-mentioned optional atmosphere forming device 26
As shown in FIG. 3, an inert gas such as N ₂ gas, Ar gas or the like is used to cover the melted surface by the laser light 35. N ₂ gas, Ar gas, etc., from an inert gas cylinder 28, etc. through a valve 30 and out of the valve 31 into a surrounding cover 27, not shown, but a surface melted by a laser beam And an inert gas injected from a nozzle.

Further, the ceramic fine powder supply device or the metal fine powder supply device is provided with a ceramic fine powder supply nozzle 20 or a metal fine powder supply nozzle 21 with an inert gas from a bopper (not shown). Such as those that erupt.
The level roller 19 is a roller in which a roller can be rolled on a tape formed of ceramic fine powder by a hydraulic cylinder or the like.

Hereinafter, embodiments of the present invention will be described.

EXAMPLES Example of Production of Polishing Tip A ceramic fine powder, 10 % by volume of cBN of 6 to 12 μm serving as abrasive grains, 10 % by volume of Al ₂ O _{3 of} 1000, and 30 parts of an acrylic binder as an organic binder were used. 2 and put into a bopper 13 as shown in FIG. 2, placed on a reinforcing tape 14 of a polyethylene sheet, and rolled by two compression rolls 15 to form a tape, which was formed into a ceramic fine powder. It was a take-up roll.

Next, an average particle size of 40 μm to be a fine metal powder
80% by volume of 99.99% Cu, 10% by volume of Cu / Ni─B (BNi2) having an average particle diameter of 40 μm, and 10% by volume of an acrylic binder as an organic binder, as shown in FIG. The tape was placed in a bopper 13, placed on a reinforcing tape 14 of a polyethylene sheet, and rolled by two compression rolls 15 to form a tape, which was formed into a tape winding roll formed of fine metal powder.

On the other hand, a drawing (30 mm in length × 60 mm in width × 10 mm in thickness) of the three-dimensional polishing tip 32 of the polishing tool (composite molded body, see FIGS. 5 to 7) 33 to be manufactured is subjected to three-dimensional CAD.
To create a horizontal slice pattern data group for each 0.4 mm thickness (thickness of tape formed of ceramic fine powder + thickness of tape formed of metal fine powder) for the tertiary polishing tip. This was input to the computer 12.

Using an apparatus for producing a composite molded body of metal and ceramics as shown in FIG. 3, the moving table 8 is operated to raise the substrate (S20C low carbon steel) 7 to a predetermined reference plane, The tape 1 formed by molding the ceramic fine powder unwound from the tape take-up roll 17 formed by the ceramic fine powder is cut, placed, and manually pressed using the level roller 19, and the moving table 3 is operated by the computer. The substrate 2 was lowered by 200 μm, and the tape formed of the metal fine powder was similarly placed on the tape 20 formed of the pressed ceramic fine powder, and manually pressed using a level roller.

In this state, the laser light generators 10a and 10b
And operating the atmosphere forming device 26, and operating the laser light irradiation device 11 under the control of the computer 12,
A laser beam having a shape corresponding to a cross-sectional shape of 0.4 mm from below the polishing tip 33 was irradiated onto the tape 2 formed of the pressed metal fine powder. Laser irradiation conditions are
The beam power was 28 W, the beam diameter was 0.25 mm, the scanning speed was mm / min, the beam scanning interval was 0.2 mm, and the defocus was 0.

After repeating the above-described steps five times, the ceramic fine powder and the metal fine powder are compensated for by the volume reduction, and these steps are repeated several times to form a tape formed of the ceramic fine powder and a metal fine powder. A tape formed by laminating a tape and opening the door provided with the manufactured polishing tip 32 beside it and removing it from the substrate 7, and a tape and metal fine powder formed by molding the ceramic fine powder of the unsintered portion around the manufactured polishing tip 32 The tape on which was molded was broken, and the abrasive tip was taken out. The dimensions of this polishing tip are 30 mm long x 60 mm wide
X The thickness was 10 mm.

Further, regarding the polishing tip manufactured above,
When the dimensional accuracy was measured, the dimensions were as expected. Further, when the surface of the polishing tip was observed with a microscope, the periphery of the ceramic fine powder was covered with a molten metal fine powder.

Further, the polishing tip 33 manufactured as described above was brazed to a holding table of the polishing tool 34 to prepare the polishing tool 34 as shown in FIGS. Using this tool, polishing was performed under the following conditions as shown in FIG. As a result, the polished surface was as smooth as required.

The ceramic fine powder and the metal fine powder are mixed at a predetermined ratio, and further, an organic binder is mixed.
A method of forming this into a tape and dissolving the metal fine powder with laser light to produce a composite molded body of metal and ceramic is also conceivable, but it is necessary to mix the ceramic fine powder and the metal fine powder as uniformly as necessary. Therefore, it is difficult to manufacture a composite molded body in which metal and ceramics are sufficiently mixed.

[0047]

The method and apparatus for manufacturing a composite molded body of metal and ceramic according to the present invention have the following excellent effects by adopting the above-mentioned structure. (1) A composite molded body of metal and ceramics can be manufactured without using a mold. (2) Since a mold is not used, it can be used for small-quantity production. Further, even a complicated shape can be manufactured relatively inexpensively, and a shape that cannot be manufactured conventionally can be manufactured. can do. (3) The composite shaped body of metal and ceramics to be manufactured is
Since the metal fine powder is melted, the periphery of the ceramic is covered with the metal, and the density is high without voids. (4) Metals and ceramics have a large difference in specific gravity.
Mixing increases the mixing time, but this mixing time can be omitted. (5) Functionally graded materials can be easily manufactured.

[Brief description of the drawings]

FIG. 1A is a conceptual cross-sectional view of a conventional composite molded body of metal and ceramics, and FIG. 1B is a conceptual cross-sectional view of a composite molded body of metal and ceramics produced by the production method of the present invention.

FIG. 2 is a concept showing the state of a composite molded body of metal and ceramic as produced by the production method of the present invention, a tape formed of ceramic fine powder not sintered, and a tape formed of metal fine powder. FIG.

FIG. 3 is a schematic front view of one embodiment of an apparatus for producing a composite molded body of metal and ceramic according to the present invention.

FIG. 4 is a conceptual diagram of an apparatus used for manufacturing a tape formed of ceramic fine powder and a tape formed of metal fine powder used in the manufacturing method of the present invention.

FIG. 5 is a front view of a polishing tool to which a polishing tip manufactured by the manufacturing method of the present invention is brazed.

FIG. 6 is a side view of that of FIG.

FIG. 7 is an explanatory view showing a method of using the polishing tool shown in FIGS. 4 and 5;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Tape formed of ceramic fine powder 2 Tape formed of metal fine powder 3 Ceramic fine powder 4 Metal fine powder 5 Organic binder 6 Manufacturing device for composite shaped body of metal and ceramic 7 Substrate 8 Moving table 9 Tape supply device 10 Laser beam Generator (a laser power supply, b laser light emitting device) 11 Laser light irradiation device, carbano mirror 12 Computer 13 Hopper 14 Reinforcement tape 15 Compression roll 16 Reinforcement tape roll 17 Tape winding roll formed of ceramic fine powder 18 Metal fine powder Tape take-up roll with formed body 19 Level roller 20 Ceramic fine powder supply nozzle 21 Metal fine powder supply nozzle 22 Shaft 23 Holding frame 24 Tape guide roll 25 Cutter 26 Atmosphere adjuster 27 Cover 28 Inert gas cylinder 29 30 Valve 31 Composite molding Body 32 quartz glass 33 abrasive tip 34 Polishing tool 35 Laser light

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kei Ogura 438-7 Kamesaku-cho, Hitachiota, Ibaraki F-term (reference) 4K020 AA22 AA24 AC04 AC05 AC06 AC07 BA02 BB29

Claims (8)

[Claims] 1. A tape formed by molding ceramic fine powder is placed on a substrate, a tape formed by molding metal fine powder is superimposed on the tape, and a laser is formed on the upper surface so as to have a cross-sectional shape of a composite molded body to be manufactured. By controlling and irradiating the light, the tape formed of the metal fine powder is melted, and these are repeated once or more than twice to produce a composite molded body in which ceramics are dispersed in the metal. A method of manufacturing a composite molded body of metal and ceramics. 2. A tape formed by molding ceramic fine powder is placed on a substrate, a tape formed by molding metal fine powder is superimposed on the tape, and a laser is formed on the upper surface so as to have a cross-sectional shape of a composite molded body to be manufactured. By controlling and irradiating the light, the tape formed of the metal fine powder is melted.Furthermore, when the metal fine powder is melted and the volume is reduced, the ceramic fine powder or the metal fine powder is supplied. The metal fine powder is melted by controlling and irradiating the metal fine powder with a laser beam, and a composite molded body in which ceramics are dispersed in the metal by repeating these steps repeatedly is produced. A method for producing a composite molded body of ceramics. 3. A tape obtained by molding the ceramic fine powder, wherein an organic binder is mixed with the ceramic fine powder,
The mixture was placed on a reinforcing tape, the mixture and the reinforcing tape were simultaneously rolled by a compression roll, and then the reinforcing tape was peeled off.The tape formed from the metal fine powder was a metal fine powder. An organic binder is mixed with the body, the mixture is placed on a reinforcing tape, and the mixture and the reinforcing tape are simultaneously rolled by a compression roll, and then the reinforcing tape is peeled off. The method for producing a composite molded body of a metal and a ceramic according to claim 1 or 2. 4. The ceramic fine powder is one or more selected from metal oxide, metal nitride, metal carbide and carbon isotope fine powder,
The metal powder according to claim 1 or 2, wherein the metal fine powder is a metal belonging to Group VIII or Ib of the periodic table and another metal alloyed with the metal. A method for producing a composite molded body of ceramics. 5. The method according to claim 1, wherein controlling the laser beam so as to have a cross-sectional shape of the composite molded body to be manufactured is controlling the laser beam based on computer aided design (CAD) data. Or the manufacturing method of the composite molding of metal and ceramic according to claim 2. 6. Computer Aided Design (CA)
D) a laser light irradiator electrically connected to a control unit that controls based on data, a laser light generator that supplies laser light to the laser light irradiator, a substrate driving device, ceramic fine powder and metal fine powder And a tape supply device for intermittently supplying both of the tapes formed with the ceramics. 7. A substrate capable of supporting a tape formed of ceramic fine powder and a tape formed of metal fine powder and capable of moving up and down, a tape formed of the ceramic fine powder on the substrate, and a metal fine powder. A tape supply device that intermittently supplies a tape formed with a body, and the substrate can be lowered and raised in accordance with the thickness of the tape formed of the ceramic fine powder or the tape formed of the metal fine powder. A moving table, a laser light irradiation device that melts to have a cross-sectional shape of a composite molded body that manufactures a tape formed by molding metal fine powder laminated on the substrate, and a laser light is applied to the laser light irradiation device. A laser light generating device for sending and a computer for controlling at least the laser light irradiating device by computer aided design (CAD) data An apparatus for producing a composite molded body of metal and ceramics, comprising: 8. The composite molding of metal and ceramic according to claim 6, wherein a device for supplying a metal fine powder or a ceramic fine powder is provided near the laser beam irradiation device. manufacturing device.