JPH0289599A - Method for strengthening metal material or synthetic resin material or the like - Google Patents

Abstract

PURPOSE:To strength a metal material or synthetic resin material by charging the material in a pressurizing cylinder vessel, rotating contacting face while pressurizing and giving shearing force. CONSTITUTION:The material 4 of the metal or the synthetic resin, etc., is charged into the vessel 3 and pressed in the bottom face 1a direction of the cylinder 1 with a pressurizing piston 2, and while pressurizing the material 4, the pressurizing piston 2 is rotated and the shearing force is given on the upper end face of the material 4 brought into contact with the end face 2a of the pressurizing piston and the material is plastic-deformed in the inner part of the material 4. In the case of the metal material, it is desirable to pressurize the material at the pressure of >=0.5 times of yield pressure of the material in the working temp. The material is strengthened with action of deformation, fining of crystal grains and uniformization of inner structure caused by plastic deformation in inner part of the material. In the case of the synthetic resin material, the material has orientating direction having different orientating direction of molecules by extrusion and spreading.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for reinforcing materials such as metals or synthetic resins.

[Conventional technology]

As a method for strengthening metal materials, for example, powder of amorphous metal or microcrystalline metal obtained by rapid solidification is
As shown in Japanese Patent Publication No. 2441 and Japanese Patent Publication No. 60-14082, there is a known method of producing products while preserving the original properties of these metals by compacting them without heating them to high temperatures. There is.

Also known is a method of strengthening a metal material by plastically deforming it by rolling or the like.

On the other hand, some synthetic resin materials are strengthened by orienting resin molecules in one direction by stretching.

[Problems to be Solved by the Invention] However, when using an amorphous metal, a microcrystalline metal, etc. produced by the above-mentioned rapid solidification method as a material, the cost I of the material itself is
-Not only is it expensive, but it is also troublesome to handle at the material stage. In addition, in the rolling method using rolls, pressure is applied linearly to the metal material as it passes between pressure rolls, and the pressure applied to the material from the rolls is applied to the material before and after the rolls are released. It escaped to the material part,
A sufficient pressing force does not act on the material, and a pressure that can sufficiently plastically deform and strengthen the crystal grains of the metal material cannot be obtained.

In addition, in the case of synthetic resin materials, conventional extrusion and rolling methods can only orient the resin molecules in the length direction of the product, and the shape of the processed material is also limited to wire rods or sheet materials. It had been.

In view of the above points, the present invention is a method for strengthening metal materials, synthetic resin materials, etc., which enables material reinforcement using relatively inexpensive bulk materials and solid materials as raw materials, and also enables the reinforcement of materials such as synthetic resin materials. The purpose is to strengthen the material by orienting resin molecules in a specific direction, and to make it possible to create a rotating body shape other than the conventional wire or sheet material.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes rotating the contact surface with the material on the inner surface of the cylinder container while the material to be strengthened is pressurized in the pressurized cylinder container. The gist of this invention is that a shearing force in the rotational direction is applied to the material under pressure. In order to apply shearing force to the material as described above, there is a method of applying a shearing force in the direction of rotation to the pressurized material from the end face by rotating the side end face in contact with the material on the inner surface of the pressurized cylinder container, Alternatively, there is a method of applying a shearing force in the rotational direction to the pressurized material from the circumferential surface by rotating the inner circumferential surface in contact with the material of the pressurized cylinder container. In this case, the rotation of the pressurized cylinder container By moving the surface along its length relative to the material in contact with it, shear forces can be applied to the material sequentially along its length.

Further, in the case of a metal material, it is desirable to pressurize it in a pressurized cylinder container at a pressure of 0.5 times or more the yield pressure of the material at the processing temperature.

[For production]

The present invention is constructed as described above, and a bulk material such as a metal or a synthetic resin, a solid material, etc. to be strengthened is pressurized in a container and subjected to a shearing force in the direction of rotation, so that the inside of the material is The material is strengthened by the effects of plastic deformation of crystal grains, refinement, work hardening of the material, and homogenization of the internal structure. Since the pressurization operation on the material is performed in a pressurized container,
The shearing force applied to the material in the rotational direction acts reliably on the material, prevents cranks, etc. from occurring in the material, causes shearing deformation within the material, and causes plastic deformation of crystal grains in the material. This effectively reduces the size of crystal grains and homogenizes the work hardening of the material.

In the case of a synthetic resin material, the resin molecules are oriented in the direction of rotation, so that the strength in the direction of rotation can be increased.

In addition, when metal compacts or granules are used as materials, material reinforcement and adhesion of powder particles are achieved by applying a large shearing force to these materials under pressure, which causes the particles in the materials to bond. The density of the material increases due to the change in the position of the porosity and the decrease in porosity, and in addition to the effects of refinement of crystal grains in the material, dispersion effect, precipitation effect, etc., the material density increases due to work hardening, homogenization of the internal structure, etc. Through reinforcement and further adhesion between particles due to plastic deformation of crystal particles, the particles in the metal powder or green compact are firmly bonded to each other and the material is strengthened.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

What is shown in FIGS. 1 and 2 shows one embodiment of the present invention, in which a pressurized cylinder container 3 is constituted by a cylinder 1 with a bottom and a pressurizing piston 2, and the cylinder 1 A material 4 such as metal or synthetic resin is loaded into a cylindrical internal space formed between the inside and the pressurizing piston 2, and subjected to pressure and shear processing.

The pressurizing piston 2 of the cylinder container 3 is a cylinder.
The material 4 loaded inside the container 3 is inserted into the piston 2 so that the material 4 loaded inside the container 3 can be slid into the interior from the open end and rotated around the axis.
The material 4 is pressurized by pressing it in the direction of the bottom surface 1a of the cylinder l, and in this pressurized state, the pressurizing piston 2 is rotated around its axis to contact the end surface from the pressurizing piston end surface 2a. By applying a shearing force to the upper end surface of the material 4, the material 4 is plastically deformed inside. In this case, as shown in FIG. 3, a coating 7 made of synthetic resin or the like with a small coefficient of friction is formed on the inner circumferential surface 1b of the cylinder 1, or a sliding ring or the like is interposed between it and the material 4. By doing so, the frictional force generated between the inner circumferential surface 1b and the material 4 in contact therewith is reduced, and the shearing force applied from the upper end surface of the material due to the rotation of the pressure piston 2 is applied to the inner circumference of the cylinder 1. The inside of the material 4 is pressurized between the pressure piston end surface 2a and the cylinder bottom surface 1a without being prevented from being transmitted to the lower part of the powder or granule material 4 due to the Fl direction force with the surface 1b. The entire body undergoes uniform plastic deformation in the direction of rotation.

What is shown in FIG. 4 represents the state of deformation that material 4 undergoes at this time, and when a metal material is used,
The material 4 is pressurized between its upper and lower end surfaces, and a shearing force F in the rotational direction is applied to the upper end surface 4a, thereby causing a large deformation action in the rotational direction at the upper part of the material 4.
A state of plastic flow occurs in the material. The velocity of the plastic flow f of this material is large in the upper part of the material 4 and becomes smaller as it goes downward. Moreover, the pressing force P by the piston 2 in this case is between the piston end surface 2a and the metal material upper end surface 4.
In order to prevent slip between the material 4 and the material 4 and to reliably apply a shearing force in the direction of rotation to the material 4, and to plastically deform the crystal grains in the metal material, the yield pressure of the metal material at least at the temperature during processing is reduced to 0. It applies more than .5 times the pressure.

Also, in the case of synthetic resin materials, plastic flow occurs in the material in the direction of rotation where shearing force is applied, as in the case of the metal materials mentioned above, and resin molecules are oriented in the direction of rotation as the material flows. become.

Materials to be strengthened in the above manner include, for example, cast products, solid metal bulk materials such as titanium sponge, metal powders, metal granules such as mechanical alloys, metal compacts, or metals in a molten state. In the present invention, preferred materials include materials that have been strengthened or various synthetic resin materials, especially those that are reinforced by the orientation of resin molecules.

Next, what is shown in FIGS. 5 and 6 is for strengthening a ring-shaped material 4. A cylinder container 3 is constituted by a bottomed cylinder 1 and a pressurizing piston 2, and the cylinder 1 A protruding shaft 6 protruding from the tip of the pressure piston 2 is inserted into a through hole 5 provided at the center of the bottom surface of the cylinder 1, and a metal or synthetic resin material is inserted into the ring-shaped space formed by the cylinder 1 and the pressure piston 2. By loading the material 4, pressurizing it with the pressurizing piston 2, and rotating the pressurizing piston 2 around its axis, the end surface 2a of the pressurizing piston 2 is
A shearing force in the rotational direction is applied to the material 4 from the outer peripheral surface 6a of the protruding shaft 6.

In this case, as shown in FIG. 7, the cylinder bottom surface la and the pressurizing piston end surface 2a are coated with a film made of synthetic resin or the like having a small coefficient of friction, or a sliding ring 8 is provided between the powder and the granular material 4. By interposing it, rotational shearing force can be transmitted uniformly and in the same direction from the outer circumferential surface 6a of the protruding shaft toward the outer circumferential direction of the ring-shaped material 4. The state of plastic flow at this time is large at the inner periphery of the ring, as shown in Fig. 8, and becomes smaller toward the outer periphery. molecules are oriented.

Moreover, what is shown in FIGS. 9(a) to 9(c) shows another method according to the present invention, in which a cylinder 1 with openings at both ends is used.
While the material 4 loaded inside is pressurized by the pressurizing pistons 2, 2'' fitted from the openings at both ends of the cylinder 1, one pressurizing piston 2 is rotated, and a part 11 of the cylinder 1 is pressed into the cylinder. The pressurizing pistons 2 and 2° are rotated relative to the other part 12 of the material 4 while applying a shearing force in the rotational direction to the material 4 at the interface A between the adjacent rotating part 11 and the fixed part 12. By moving the material 4 to the left and passing the entire material 4 sequentially through the boundary surface A, a shearing force in the rotational direction is applied uniformly over the entire length of the material 4. In this case, the plastic flow and molecular orientation in the material 4 are as shown in FIG. That is,
While the material 4 is pressurized from both ends in the cylinder by a pressurizing piston 2.2゜, shearing occurs in the rotational direction at the interface A between the relatively rotating adjacent rotating part 11 and fixed part 12. When force is applied, plastic deformation occurs in this part. By moving the material 4, the material 4 passes through the boundary surface A from one end to the other, whereby the entire material is plastically deformed.

Furthermore, in the case shown in FIG.
．． By moving the material 4 compressed at an angle of 2°, the direction of rotation is sequentially changed relative to the material 4 at the image boundary surfaces A, A with the adjacent fixed parts 12 and 12° at both ends of the rotating part 11. The material is plastically deformed in the direction of rotation by applying a shearing force of .

Furthermore, in the devices shown in FIGS. 12 and 13, a fixed cylinder part 12 or a 12° end 12a is used in place of the 2° pressurizing piston in the devices shown in FIGS. 9 and 11, respectively. By closing this and providing an extrusion port 13 therein, it is possible to extrude the material 4, which has been strengthened by applying shear force at the interface A between the rotating part 11 and the fixed part 12, into a desired shape. This is what I did.

Furthermore, FIG. 14 shows another embodiment of the present invention, in which a rotary cylinder part 11 with one end closed is opened at both ends, fixed in the rotational direction, and fixed in the axial direction. A movable movable cylinder part 15 is inserted, and a pressurizing piston 2 is inserted into the open end of the movable cylinder part 15 to form a pressurizing cylinder container 3. By rotating the rotary cylinder part 11 while pressurizing the material 4 loaded inside the container 3 and moving the movable cylinder part 15 backward in the direction of the pressurizing piston 2, the material 4 is located within the rotary cylinder part ll. A shearing force in the rotational direction is applied to the material 4 at the open end surface B of the moving cylinder part 15 to strengthen the material.

In the above-described method of the present invention, the material to be reinforced, such as metal or synthetic resin, is used in a solid bulk, powder, or molten state. When using materials such as the solid or compacted powder, frictional heat is generated during pressurization and shearing,
In some cases, the reinforcing material may be in a molten state, and it is also considered to heat the material as necessary during pressurization and shear processing, and to cool the reinforcing material after processing. Furthermore, the material to be strengthened is supplied in advance in a molten state or a state close to it, and the temperature is lowered during the pressurization and shearing process, and the material temperature is adjusted so that it is below the recrystallization temperature at the end of the process. It's okay.

In addition, when the material that has been strengthened by the above-mentioned pressure and shear processing according to the method of the present invention is further heated to the recrystallization temperature, the crystal grains in the material have been refined by the above-mentioned processing, and In a state where the growth of crystal grains is suppressed due to the high degree of processing of the material, it is possible to remove internal strain and work hardening while maintaining the strengthened material strength without destroying the microcrystalline structure. It is possible.

〔Effect of the invention〕

As described above, according to the method for strengthening metal materials, synthetic resin materials, etc. according to the present invention, by applying a shearing force in the rotational direction to these materials under pressure, plastic deformation occurs inside the materials, and crystallization is caused. The material is strengthened by deforming the particles, making them finer, and further homogenizing the internal structure. In the case of synthetic resin materials, in addition to strengthening by plastic deformation of material particles, resin molecules are strengthened in the direction of rotation by plastic flow in the direction of rotation of the material, which is completely different from the direction of molecular orientation caused by conventional extrusion, stretching, etc. It is possible to obtain a synthetic resin material oriented at 4°.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of a pressurized cylinder container for carrying out the method of the present invention, FIG. 2 is a side cross-sectional view for explaining the method of the present invention using the cylinder container, and FIG. 3 is a perspective view of an embodiment of the method of the present invention. FIG. 4 is an explanatory diagram of the material reinforcement mechanism in the above method, FIG. 5 is a perspective view of another embodiment of the cylinder container, and FIG. 6 is a side cross-sectional view of another embodiment using the cylinder container. FIG. 7 is an explanatory side sectional view of another embodiment of the method of the present invention, FIG. 8 is an explanatory diagram of the material reinforcement mechanism in the method, and FIGS. ) is a process explanatory diagram of another embodiment, FIG. 10 is an explanatory diagram of a material reinforcement mechanism in the method of FIG. 9, and FIGS. 11 to 14 are side sectional views for explaining still another embodiment. Rotating part, 12: Fixed part, 13: Extrusion port, 15: Moving part. Patent applicant Ibuari Research Co., Ltd. (1 other person) 1 Niji cylinder - 2: Pressurized piston, 3: Pressurized cylinder container, 4: Powder, 5: Through hole, 6: Projected shaft, 7: Coating,
8: Ring, 9: Supply port, 11: Fig. 2J Fig. 2d Fig. 2 Fig. 72 / ノ

Claims (1)

[Claims] 1) By rotating the contact surface with the material on the inner surface of the cylinder container while the material to be strengthened is pressurized in a pressurized cylinder container, the material under pressure is subjected to rotational shearing. A method for strengthening metal materials, synthetic resin materials, etc., characterized by applying force. 2) A shearing force in the rotational direction is applied to the pressurized material from the end surface by rotating the side end surface in contact with the material on the inner surface of the pressurized cylinder container, according to claim 1. A method for strengthening metal materials or synthetic resin materials. 3) A shearing force in the rotational direction is applied to the pressurized material from its outer circumferential surface by rotating the inner circumferential surface of the pressurized cylinder container that is in contact with the material. A method of strengthening metal materials or synthetic resin materials, etc. 4) The metal material according to claim 3, wherein shearing force is applied to the material by moving the rotating surface of the pressurized cylinder container in the longitudinal direction of the material in contact with the material. Or a method of strengthening synthetic resin materials, etc. 5) The metal material according to claim 1, characterized in that the metal material is pressurized in a pressurized cylinder container at a pressure of 0.5 times or more the yield pressure of the material at the processing temperature; Method for strengthening synthetic resin materials, etc.