JP2002282931A - Extrusion device, extrusion method and extrusion control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extrusion device which can manufacture an extruded section bar of composite material having an arbitrary cross-sectional shape without being limited by a cross-sectional shape, the approximate similarity of shape of a composite material billet and surface coating of the billet, an extrusion method using the device and an extrusion control method therefor. SOLUTION: A plurality of pieces of metal materials are aligned in a container parallel to the direction of extrusion and extruded by stems while a movable dice installed at a fixed dice hole of the outlet of the container which allows sliding in the same direction of extrusion and/or in the opposite direction is reciprocated in order to keep an area proportion of each material at the cross section of the extruded section bar during extruding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruded shape made of a composite metal material (hereinafter, simply referred to as "composite material") by extruding a plurality of metal materials (hereinafter, simply referred to as "material"). Extrusion processing equipment used to obtain
The present invention relates to an extrusion method and an extrusion control method.

[0002]

2. Description of the Related Art As is well known, extrusion is a method in which a material (a billet) placed in a container called a container is pressurized, and the material is extruded through a die hole to obtain an extruded shape having a predetermined shape. In one step, an extruded profile product having a relatively complicated cross-sectional shape can be obtained. Especially in recent years,
The problem of recycling has been highlighted, and from this point of view, it is also used as an exterior structural member for transport vehicles that require lighter weight, higher strength, and lower cost for railway vehicles, automobiles, ships, and the like. As structural members of home appliance OA equipment and various mechanical parts that require
The use of extruded aluminum alloy profiles is increasing.

[0003] By the way, among the above structural members,
Depending on the application, a composite member in which a plurality of alloys are integrated instead of a single alloy is required. In the case of such a composite member, the joining strength between different alloys becomes a problem. However, in the extrusion molding, a strong joining can be obtained by applying a high pressure (in many cases, also applying a high temperature). So many suggestions have been made.

[0004] As an example of application to extrusion processing of a wire having a small cross-sectional area, as disclosed in Japanese Patent No. 2761694, for example, a plurality of different materials are made substantially similar to the cross-sectional shape of a clad wire. There is a method in which a cylindrical billet is formed by superimposing multiple layers, and the billet is hot-extruded and repeatedly subjected to cold drawing and heat treatment to obtain a clad wire.

On the other hand, when a material billet that does not resemble the cross-sectional shape of a composite extruded profile is used, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-257629 and Japanese Patent No. 2731605, two types of different billets are used. The material billet is arranged before and after in the extrusion direction, and the coated extruded material can be formed using the flow behavior of the material near the interface between the non-flow zone (dead metal zone) and the flow zone generated in the container during extrusion. There is something.

For example, as disclosed in Japanese Patent No. 2721706, two kinds of different materials are supplied to an extruder separately from one another as a main material and the other as an auxiliary material for forming a skin. There is a material in which the auxiliary material for forming the skin is coated on the surface of the main material to enable complex integration.

[0007] However, the method disclosed in Japanese Patent No. 2761694 is limited to the production of a composite extruded material having a shape substantially similar to the sectional shape of the composite material billet, which is one of the advantages of the extrusion molding method. The versatility of certain molded shapes is compromised.

On the other hand, in the methods disclosed in JP-A-8-257629, Japanese Patent No. 2731605, and Japanese Patent No. 2721706, each material in a fluidized zone and a non-fluidized zone (dead metal zone) in a container during extrusion. In general, it is difficult to form a composite extruded profile having a stable composite ratio cross section since the composite ratio of the cross section of the extruded material is determined by the existence ratio of the composite. That is, in general, as the extrusion proceeds, the existence ratio of the auxiliary material for forming the skin in the non-flow region and the flow region varies, so that the composite ratio of the auxiliary material forming the skin in the cross-section of the composite extruded shape is Will fluctuate. However, only when the thickness of the skin of the composite extruded profile is sufficiently thin compared to the diameter of the cross section, that is, only when the auxiliary material occupies almost the non-flow area,
Since the composite ratio of the material existing in the non-fluid region and the material existing in the fluid region does not change substantially as the extrusion proceeds, the composite ratio of the auxiliary material in the cross section of the composite extruded profile can be made substantially constant. Therefore, these methods are essentially limited to the production of composite extruded profiles with thin coatings.

As described above, the method disclosed in Japanese Patent No. 2761694 is limited to the production of a composite extruded material having a shape substantially similar to the cross-sectional shape of the composite material billet. Although the methods disclosed in U.S. Pat. No. 2,731,605 and U.S. Pat. No. 2,721,706 do not have such limitations, they are limited to coating production of extruded profiles.

[0010]

As described above, the conventional method for producing a composite extruded profile is limited to the production of a composite extruded profile having a shape substantially similar to the cross-sectional shape of the billet of the composite material. There is a problem that is limited to the production of coatings. In view of the principle of the extrusion molding method, each material derived from each material in the cross section of the composite extruded shape (to distinguish the state before and after passing through the dies, the material before passing through the dies is called the "material", and the material after passing through the dies is called the "material". It is an essential problem that there is a disadvantage that the mechanical properties such as strength and bendability are not constant in the longitudinal direction of the composite profile due to the variation of the ratio of the material.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and is not limited to a cross-sectional shape substantially similar to the cross-sectional shape of the composite material billet, and is not limited to covering the skin. It is an object of the present invention to provide an extrusion apparatus capable of manufacturing a composite extruded profile having a shape, an extrusion method using the apparatus, and a method for controlling the extrusion processing.

[0012]

According to one aspect of the present invention, there is provided a container for accommodating a plurality of metal materials in parallel in a material extrusion direction, and a container for accommodating the plurality of metal materials. An extrusion processing apparatus comprising: a stem for simultaneously pressing the raw materials; and a fixed die having a hole through which the plurality of metal materials are simultaneously extruded at the container outlet. In addition, one or more movable dies of the same number or less as the plurality of metal materials are slidably provided in the same direction as the material extrusion direction and / or in the opposite direction, and the movable dies and the fixed dies are used in combination. An extruding apparatus for producing an extruded profile made of a composite material, characterized in that any one of the plurality of materials is individually passed through the formed extruded hole.

According to a second aspect of the present invention, a plurality of metal materials housed side by side in a container in parallel with the material pushing direction are provided.
Simultaneously pressurizing with the stem and pushing out from the hole of the fixed die provided at the container outlet, at least one of the movable dies of the same number or less as the plurality of metal materials and one or more provided in the hole. By moving one movable die in the same direction or the opposite direction to the material extrusion direction, in the cross section perpendicular to the longitudinal direction of the extruded shape, the extruded shape made of a composite material, the plurality of metal materials are used. This is an extrusion method in which extrusion is performed while keeping the area ratio of each material constant.

According to a third aspect of the present invention, a plurality of metal materials are extruded by using the extruding apparatus according to the first aspect to obtain an extruded section made of a composite material. The pressing speed of the stem, the deformation resistance of each of the plurality of metal materials, and the cross-section perpendicular to the longitudinal direction of the extruded shape to be extruded, from the plurality of metal materials forming the composite material Of the area occupied by the material
From the arbitrarily given initial position of each of the movable dies, a relationship between the moving distance of the stem from the extrusion start position and the moving speed of each of the movable dies, required to keep the area ratio constant, is determined. (B) setting each of the movable dies to the initial position given in the step (a) and starting the extrusion of the plurality of metal materials at the stem pressurizing speed; Until the end of the extruding process, the moving speed of each movable die is changed to the moving speed obtained in the step (a) according to the moving distance of the stem from the starting position of the extruding process, and the moving speed of each movable die is changed. Is controlled by the steps (a) to (c).

According to a fourth aspect of the present invention, in the extrusion processing control method according to the third aspect, instead of using the moving distance of the stem from the extrusion processing start position, the movable die is extruded from the extrusion processing start position. This is an extrusion control method using the moving distance of the extrusion, the extrusion length or the extrusion volume of the extruded profile, or the elapsed time from the start of the extrusion.

Extrusion processing apparatus according to the present invention (Claim 1)
And an extrusion method (Claim 2) is a case in which a plurality of materials, for example, two types of materials are simultaneously extruded to produce a composite extruded shape, and the movable die is composed of two as many as the number of materials. (See FIGS. 7 and 8). During the extrusion of the material, the two movable dies are appropriately advanced or retracted in the same direction or the opposite direction to the extrusion direction of the material, so that the cross section perpendicular to the longitudinal direction of the composite extruded profile (hereinafter, referred to as , Simply referred to as “composite extruded cross section”).

[Operation] In FIG. 1, two types of material billets 1A and 1B having different deformation resistances are simultaneously extruded using only the fixed die 10 without using the two movable dies 11A and 11B to produce a composite extruded material. Let's assume that In this case, as shown in FIG. 7A, in the initial stage of the pressure extrusion of the raw materials 1A and 1B by the stem 3,
Since the material 1A having the smaller deformation resistance has a higher fluidity, it easily passes through the hole (extrusion molding hole) of the fixed die 10, so that the two types of materials 1A and 1B in the cross section of the extruded profile material.
Interface 13 is shifted toward the material 1B having the larger deformation resistance. On the other hand, since the material 1B having the larger deformation resistance remains in the container 2 more than the material 1A having the smaller deformation resistance, the interface 13 between the two types of materials 1A and 1B has the material 1A having the smaller deformation resistance. Overhang to the side. For this reason, when the pressure extrusion by the stem 3 is continued, FIG.
As shown in FIG.
Since it passes through the hole of 0 (extrusion molding hole),
The interface 13 between the two types of materials 1A and 1B in the cross section of the extruded profile gradually moves toward the material 1A having the smaller deformation resistance, and has a small deformation resistance in the final stage of the pressure extrusion by the stem 3. Is greatly shifted to the material 1A side. As described above, when extrusion is performed using only the fixed die 10, the interface 13 between the two types of materials in the cross section of the extruded profile meanders in the longitudinal direction of the extruded profile.

On the other hand, as shown in FIG.
When the two movable dies 1A and 1B are mounted on the material 1 and the material 1A and 1B are pressed and extruded by the stem 3, only the movable die 11B on the material 1B side having the larger deformation resistance is subjected to the material extrusion direction. Conversely, when the material is moved, the extruded volume of the material 1B having the larger deformation resistance increases, and the interface 13 tends to move toward the material 1A having the smaller deformation resistance.
And, as the moving speed of the movable die 1B increases, the extrusion volume speed of the material 1B increases, and
Therefore, the position of the interface 13 can be kept constant by adjusting the moving speed of the movable die 1B. As the pressure extrusion by the stem 3 progresses, the flow states of the two types of materials 1A and 1B change in the container 2 and in the extrusion holes formed by the fixed die 10 and the movable dies 1A and 1B, and the two are extruded. The volume velocity changes to cause a shift in the position of the interface 13, but each time the movable die 1
By adjusting the moving speed of B, it is possible to correct the displacement of the interface 13 and advance the extrusion while always keeping the position of the interface 13 constant. In this way, the position of the interface 13 between the two types of materials 1A and 1B in the cross section of the composite extruded profile is always constant in the longitudinal direction of the profile throughout the entire extrusion process (the area ratio of the two types of materials 1A and 1B is kept constant). (Always constant).

In the above, instead of moving the movable die 11B on the material 1B having the larger deformation resistance, the movable die 11B is fixed, and the movable die 11A on the material 1A having the smaller deformation resistance is removed. Move the material in the same direction as the material extrusion direction to reduce the deformation resistance of the material 1
The position of the interface 13 may be kept constant by reducing the extrusion speed of A. Alternatively, as a method combining these two, the material 1B having the larger deformation resistance is used.
The movable die 11B of the material 11A may be moved in the direction opposite to the extrusion direction, and the movable die of the material 11A having the smaller deformation resistance may be moved in the same direction as the extrusion direction. In this case, compared to the case where only one movable die is moved, the fixed die 10 of both movable dice 11A and 11B is moved.
Therefore, the total moving distance of each of the movable dies 11A and 11B throughout the entire period of the extrusion process can be shortened. As a result, the fixed die 1
The length of the bearing 10A can be shortened, and the equipment can be made compact, the extrusion pressure can be reduced, and the like.

Further, in the present invention, since the movable die is moved in the same direction as the material extrusion direction or in the opposite direction to change the extrusion speed of the material, the fluctuation of the flow of the material in the container due to the movement of the movable die. Is similar to the principle of the indirect extrusion method, and is kept near the extrusion hole. Therefore, even if the movable die is moved during the extrusion, a stable material flow can be maintained.

According to the extrusion control method of the present invention (claims 3 to 5), in obtaining a composite extruded profile,
By changing the moving speed of the movable die during extrusion in accordance with a predetermined change in the moving speed, it is possible to easily extrude the material so that the position of the interface between the materials is always constant.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional perspective view schematically showing an entire configuration of an extrusion processing apparatus according to an embodiment of the present invention. FIG. 2 is a cross-sectional perspective view for explaining an extruding process performed by the extruding device shown in FIG.

1 and 2, reference numerals 1A and 1B denote aluminum alloy billets having different deformation resistances. In this embodiment, 1A is A1050 having a smaller deformation resistance and 1B is A3003 having a larger deformation resistance than 1A. 2 is container, 3
Indicates stems, respectively. 10 is a fixed die,
It is fixed to the end of the container 2 by a fixed die holder 4. Reference numerals 11A and 11B denote movable dies which are slidably movable in the die holes of the fixed die 10 in the direction in which the materials 1A and 1B are extruded and in the opposite direction. 6A and 6B are movable dice 11A via movable dice holders 5A and 5B,
It is a cylinder as a driving device for moving 11B.

The shape of the container 2 is not particularly limited and may be prismatic, but in this example, it is cylindrical. The billets 1A and 1B have the same height, the ratio of the horizontal cross-sectional area is equal to the area ratio of each material constituting the horizontal cross-section of the composite extruded profile, and the shape of the column is vertically divided. 1A and 1B are inserted into the container 2 in a state where they are aligned with each other on the vertical split surface. Movable die 11A and fixed die 10
The movable dies 11A, 11B are formed such that only the material 1A flows into the extrusion molding hole 121A formed by the above, and only the material 1B flows into the extrusion molding hole 121B formed by the movable die 11B and the fixed die 10. Is fixed die 10
Are arranged in the holes.

FIGS. 3A and 3B are views showing the fixed die 10 and the movable dies 11A and 11B in FIG. 1, wherein FIG. 3A is a plan view and FIG. 3B is a sectional view taken along the line AA of FIG. is there.

In FIG. 3, the fixed die 10 and the movable dies 11A and 11B are used for producing an H-shaped member made of a composite material in this embodiment. The fixed die 10 has vertical holes 102A and 102B, and both holes 102A and 102B.
And a web forming hole 103 that communicates with the web. As shown in FIG. 2 (a), the movable dies 11A and 11B have flange / web forming notch holes 122A and 1H having a horizontal cross section of "inverted T-shape" and extending in the material pushing direction.
22B, and the vertical hole 102 of the fixed die 10
A, 102B are slidably inserted into the vertical holes 102A, 102B and are moved forward and backward in the vertical holes 102A, 102B extending in the material pushing direction.

As described above, as the overlapping portion of the opening of the fixed die 10 and the movable dies 11A and 11B, H
-Shaped extrusion holes (102A, 122A, 103, 1
22B and a series of 121B) are formed, and the movable dies 11A and 11B are configured to be able to advance and retreat in the holes of the fixed dies 10.

Next, a method of extruding a composite extruded material by using the extruding apparatus shown in FIG. 1 will be described focusing on the movement of a movable die. FIG.
Is an example of a composite extruded profile to which the present invention is applied,
It is a figure which shows the H shape | mold material which compounded two types of aluminum alloy materials (A1050 and A3003 in this example) from which deformation resistance differs.

FIG. 1 shows the initial set positions of the movable dies 11A and 11B at the time of extrusion.
The movable die 11A is positioned at the hole entrance end of the vertical hole 102 of the fixed die 10 by A, and the movable die 11B is positioned at the hole exit end of the vertical hole 102 of the fixed die 10 by the cylinder 6B. Extrusion is started at this movable die position. That is, the stems 3 are pressed down at a constant speed to simultaneously press the raw materials 1A and 1B,
The piston rod of B is extended, and the movable die 11B in the vertical hole 101B is pushed at a predetermined speed toward the entrance of the vertical hole 101B (moves forward). On the other hand, in this example, the extension and contraction of the piston rod of 6A are not performed, and the movable die 11A is fixed at the initial setting position without moving. Thereby, the amount of movement of the interface 13 between the materials 1A and 1B toward the material 1B having the larger deformation resistance generated by the pressure extrusion by the stem 3 can be compensated for by pushing (moving forward) the movable die 11B. 13 can be kept constant. In this way, by continuing the pressure extrusion by the stem 3 and the pushing (moving forward) of the movable die 11B until the end of the extrusion, the position of the interface 13 between the materials 1A and 1B having different deformation resistances can always be kept constant. In addition, a composite extruded profile in which the interface 13 is straight (the area ratio of each material (material) in the cross section is constant) can be formed.

The embodiment of the present invention is not limited to the above example, but belongs to the technical scope of the present invention as long as it is configured so as to exhibit the effects of the present invention.

For example, the material having different deformation resistance is not limited to the combination of aluminum alloys as in the above example, but may be a combination of aluminum, magnesium and its alloy, zinc and its alloy, copper and its alloy, and the like. It may be.

The number of material billets is 2 as in the above example.
The number is not limited to three, and may be three or more.
In this case, the material types (deformation resistance) may be different for each material billet, or a plurality of material billets of the same material (same deformation resistance) may be included. For example, when two types of material billets are used, one type of material billet is sandwiched between two other types of material billets from both sides and extruded to form a sandwich-shaped extruded shape. Applicable.

As described above, the shape of the container is not limited to the columnar shape described above, but may be a prismatic shape, and the cross-sectional shape of the composite extruded material is not limited to the H-shape but may be the I-shape. , Square, circular, elliptical, etc.

In the above example, the material 1 having the smaller deformation resistance
The movable die 11A on the A side is fixed, and only the movable die 11B on the side of the material 1B having the larger deformation resistance is moved forward (pushing direction). May be fixed, and only the movable die 11A on the material 1A side having the smaller deformation resistance may be moved backward (withdrawal direction). Alternatively, the movable die 11A on the material 1B having the larger deformation resistance may be moved forward while the movable die 11A on the material 1A having the smaller deformation resistance is moved backward. Alternatively, a method of starting moving the other movable die after moving one movable die may be used.

The number of movable dies does not need to be the same as the number of material billets as in the above example, and can be smaller than the number of material billets. That is, for example, 2
In the case of the above example using the material billet, the same is true even if the movable die 11A on the material 1A having the smaller deformation resistance is eliminated and only one movable die 1B on the material 1B having the larger deformation resistance is used. An effect can be obtained. When a sandwich-shaped extruded material is formed using two types of material billets as described above, the number of material billets is three, but one movable die, which is two less than the number of materials, is placed in the center. A similar effect can be obtained by providing the material billet at a position where the material billet is extruded. When the number of fixed dies is set to be larger than the minimum required number, by appropriately combining the forward movement and the backward movement of the individual fixed dies as described above, each movable die in the entire extrusion period is appropriately combined. The moving distance can be reduced, and as a result, the bearing length of the fixed die can be shortened, so that advantages such as downsizing of equipment and reduction of extrusion pressure are added.

Next, how the movable die is controlled when a plurality of raw materials are extruded by using the extruder shown in FIG. 1 to obtain a composite extruded profile will be described. FIG. 5 is a flowchart for explaining the extrusion processing control method according to the present invention. Here, in order to simplify the explanation, the movable die 11B on the side of the material 1B having the larger deformation resistance using the two materials 1A and 1B shown in FIG.
A description will be given of the case of moving only one.

First, the initial positions of the two movable dies 1A and 1B at the start of extrusion are given (step S).
1).

Next, the deformation resistance of the two materials 1A and 1B forming the composite extruded profile to be extruded,
Based on the extrusion ratio and the area ratio of each material in the cross section of the extruded profile, the moving distance of the stem 3 and the movable die 11B for maintaining the area ratio of each of the two types of material in the cross section of the extruded profile in advance. A relational expression with the moving speed is obtained (step S2). This relational expression is, for example,
It is obtained by calculation according to the steps (1) to (5) (see FIG. 6).

(1) Assume that the stem 3 has reached a position P at a distance x from the extrusion start position S after the start of the extrusion.
At this time, it is assumed that the interface 13 between the material 1A and the material 1B is straight (the dashed line in FIG. 6).

(2) Here, assuming that the movable die 11B is fixed without moving, the fixed die 10 at the inlet (container outlet) at the hole of the fixed die 10 when the stem 3 is further moved by a predetermined minute distance Δx. The amount of movement Δy of the interface 13 between the material 1A and the material 1B in the horizontal direction is calculated using a generally used plastic deformation equation. That is, the deformation resistance of each material (usually yield stress is used), the extrusion ratio, the coefficient of friction between the container 3 and each of the materials 1A and 1B, the fixed die 10 and the movable dies 11A and 11B and each material are used in the plastic deformation equation. The metal flow of each material 11A, 11B can be calculated by substituting the coefficient of friction with 1A, 1B, the shape and dimensions of the container 3, the fixed die 10, and the movable dies 11A, 11B, from which the two materials 11A and 11B can be calculated. Of the interface 13 can be calculated. If necessary, the position of the stem 3 is appropriately changed and the movable die 11B is fixed, an extrusion experiment is performed, Δy is measured, and the coefficient of the plastic deformation equation is corrected and used. Is preferred.

(3) The average linear velocity u of the material passing through the entrance of the fixed die (= u _S · S _C / S _FD ; where u _{S is a} stem) The value ΔV (= u · Δy) multiplied by the moving speed S _C : container cross-sectional area and S _FD : fixed die entrance area is the value of the deformation resistance projecting to the material 1B side with the larger deformation resistance in the cross section of the extruded profile. This corresponds to a change in the volume velocity of the smaller material 1A.

[0042] (4) Accordingly, the pushing speed (moving speed) u _B of an amount corresponding movable die 11B corresponding to the _{ΔV Δu B (= ΔV / S} MD; here, S _MD: movable die 1B
Of the material 1B, the extruded volume velocity of the material 1B is increased by just ΔV, and the movement amount Δy of the interface is increased.
Is canceled and Δy = 0, so that extrusion can be performed without movement of the interface.

(5) In this way, the same calculation is repeated every time the stem moving distance increases by a predetermined minute distance Δx from the start to the end of the extrusion processing, and the stem moving distance x and the moving speed u _{B of the} movable die 11B are calculated. Can be obtained. In addition, the predetermined minute distance Δx is equal to the movable die 11B.
Changing the moving speed does not become too frequent, and within the range that can maintain the calculation accuracy of the moving speed u _B of the movable die 11B, may be appropriately selected.

Thereafter, the movable die 11B is moved to step S
Positioning is performed at the initial position given in step 1 (step S3), and extrusion processing is started (step S4).

Then, the moving distance x of the stem 3 is constantly measured during the extrusion process, and every time x increases by Δx (step S5), the moving speed u _B of the movable die 11B is obtained by the relational expression obtained in step S2. The value is changed to the calculated value (step S6). Next, it is determined in step S7 whether or not the extrusion processing has been completed. If the extrusion processing has not been completed (NO in step S7), the process returns to step S5. In addition, about the end of the extrusion process of step S7,
Detecting the moving distance of the stem 3, detecting the longitudinal length of the extruded profile being extruded, or detecting the amount of extruded material on the die exit side (profile molding amount); It can be determined by the following.

As described above, steps S5 to S
7 is repeated. In this way, the extrusion process is controlled so that the position of the interface of the material is always kept constant until the end of the extrusion process.

An apparatus for controlling the movement of the movable die includes a cylinder control unit having a control valve for controlling a cylinder for driving the movable die, a driving of the movable die by the cylinder and a cylinder control unit. And a computer for providing a signal for instructing the moving speed. This computer receives the deformation resistance of the raw materials 1A and 1B forming the extruded profile to be extruded, the area ratio of each material (raw material) 1A and 1B in the cross section of the extruded profile, and the dimensional and shape information of the extruded profile. Then, based on the input values, the moving speed of the movable die 1B at which the material (material) interface position in the cross section of the extruded profile becomes constant is calculated using the plastic deformation equation, and these are stored in the memory. I have.

As for the timing for changing the moving speed of the movable die 1B, for example, means for detecting the moving distance of the stem 3 is installed, while the moving speed of the stem 3 is set as the timing for changing the moving speed of the movable die 1B. Distance x
Is stored in a memory. Then, after the start of the extrusion process, the computer determines that the amount of change in the moving distance x of the stem from the moving distance of the stem 3 input from the detection means has reached its set value Δx, that is, changes the moving speed of the movable die 11B. It is possible to recognize that the timing has come. Alternatively, the movement distance of the movable die 11B from the extrusion start position, the extrusion length or the extrusion volume of the extruded profile, or the elapsed time from the start of the extrusion processing may be used to know the timing of changing the movement speed of the movable die 11B. You may comprise.

[0049]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Two types of aluminum alloy billets (A1050, A300) were prepared by using the extruder shown in FIG.
The above control method was applied to the case where H) was manufactured by simultaneously extruding 3). FIG. 8 shows FIG.
3 is a diagram illustrating a relational expression between the moving distance of the stem 3 and the moving speed of the movable die 11B during the extrusion process, which is obtained according to the procedure of step S2 of FIG. Then, as a result of performing the extrusion by controlling the moving speed of the movable die 11B based on this relational expression, the position of the interface between the two types of materials in the cross section perpendicular to the material extrusion direction is always constant in the longitudinal direction. The material was obtained.

[0050]

As described above, according to the extrusion apparatus, the extrusion method and the extrusion control method according to the present invention, when extruding a plurality of materials such as aluminum alloys to obtain a composite extruded section, By changing the moving speed of the movable die, it is possible to easily form a composite extruded profile in which the area ratio of each material in the cross section of the extruded profile is constant. This makes it possible to easily produce a composite extrusion having an arbitrary cross-sectional shape, which has been difficult in the past, and to expand the applicable range of the composite extrusion.

[Brief description of the drawings]

FIG. 1 is a cross-sectional perspective view schematically illustrating an entire configuration of an extrusion processing apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional perspective view illustrating a state of extrusion processing by the extrusion processing apparatus shown in FIG.

3A and 3B are diagrams showing a movable die and a fixed die in FIG. 1, wherein FIG. 3A is a plan view and FIG. 3B is a sectional view taken along the line BB of FIG.

FIG. 4 is an example of a composite extruded profile to which the present invention is applied, and is a diagram showing a composite aluminum alloy H-profile.

FIG. 5 is a flowchart illustrating an extrusion control method according to the present invention.

FIG. 6 is a cross-sectional view of an extruder for explaining a procedure for obtaining a relational expression between a stem moving distance and a movable die moving speed.

FIGS. 7A and 7B are cross-sectional views of an extrusion apparatus showing a state in which a composite extruded shape is manufactured using only fixed dies. FIG. 7A is a view showing an initial state of the extrusion processing, and FIG. It is a figure showing a situation.

FIG. 8 is a diagram illustrating a relationship between a moving distance of a stem and a moving speed of a movable die during extrusion processing.

[Explanation of symbols]

1A, 1B ... material (or material) 2 ... container 3 ...
Stem 4: Fixed die holder 5A, 5B: Movable die holder 6A, 6B: Cylinder 10: Fixed die 102A, 102B: Vertical hole 103: Web forming hole 11A, 11B: Movable die 121A, 1
21B: Extrusion hole 122A, 122B: Notch hole for flange / web formation 13: Interface

Claims (4)

[Claims] 1. A container for accommodating a plurality of metal materials in parallel in a material extrusion direction, a stem for simultaneously pressing the plurality of metal materials, and a container outlet portion,
An extruding apparatus comprising: a fixed die having a hole through which the plurality of metal materials are simultaneously extruded; and further, in the hole of the fixed die, at least one and the same number as the plurality of metal materials. Or less movable dies are slidably provided in the same direction as the material extrusion direction and / or in the opposite direction, and each of the extrusion dies formed by the movable dies and the fixed dies has the plurality of movable dies. An extruding apparatus for producing an extruded profile made of a composite material, wherein any one of the metal materials is individually passed. 2. A method according to claim 1, wherein a plurality of metal materials housed side by side in a container in parallel with the material extrusion direction are simultaneously pressed by a stem and extruded from a hole of a fixed die provided at the container outlet. The extruding is performed by moving at least one movable die of at least one movable die provided in the hole and the same number or less as the plurality of metal materials in the same direction or the opposite direction to the material extrusion direction. An extruding method for extruding while maintaining a constant area ratio of each of the plurality of metal-derived materials in an extruded profile made of a composite material in a cross section perpendicular to the longitudinal direction of the profile. 3. When extruding a plurality of metal materials by using the extrusion processing device according to claim 1 to obtain an extruded profile made of a composite material, the following steps (a) to (c) are performed. An extruding control method characterized by controlling the extruding process by using the method. (A) The pressing speed of the stem, the deformation resistance of each of the plurality of metal materials in advance, and the formation of the composite material in a cross section perpendicular to the longitudinal direction of the extruded shape to be extruded. From the area ratio of each material derived from the plurality of metal materials and the arbitrarily given initial position of each movable die, necessary to keep the area ratio constant, from the extrusion start position of the stem. The relationship between the moving distance and the moving speed of each movable die is determined in advance. (B) The movable dies are set at the initial positions given in the step (a), and the extrusion of the plurality of metal materials is started at the stem pressing speed. (C) changing the moving speed of each of the movable dies to the moving speed determined in the step (a) in accordance with the moving distance of the stem from the starting position of the extruding process until the end of the extruding process; Move each movable die. 4. The extruding control method according to claim 3, wherein, instead of using the moving distance of the stem from the extruding start position, the moving distance of each movable die from the extruding start position, or An extruding control method using the extruded length or extruded volume of the extruded profile or the elapsed time from the start of extruding.