JPH02137612A - Extrusion processing equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an extrusion processing apparatus, for example, an extrusion processing apparatus for producing extruded products having curved parts, such as rail materials, automobile bumpers, etc.

2. Description of the Related Art Conventionally, extruded products made of metal such as aluminum, which have curved parts, are generally produced by first producing a straight extruded shape with a predetermined cross-sectional shape using an extruder, and then generally cutting this into a predetermined length. After cutting, it was manufactured by cold bending using a bending machine.

Problems to be Solved by the Invention However, in the above method, if the radius of curvature required for the bent part of the extruded product is so small that it exceeds a certain limit, When a bent part is formed in an extruded section, defects such as buckling, wrinkles, rough skin, and cracks appear on the surface thereof, leading to deterioration in the quality of the extruded product. Therefore, the above method can only be applied to the case of forming a curved portion with a relatively large radius of curvature within a range in which such defects do not appear.

In addition, when forming a bent part in a large extruded section, the bending stress on the surface becomes large when bending is applied, so even if the bent part has a relatively large radius of curvature, the surface The above defects appear on the
This will lead to deterioration in the quality of the extruded product.

This invention was made in view of the above-mentioned problems, and its purpose is to form a curved part with a desired radius of curvature without causing defects such as buckling, wrinkles, roughness, and cracks on the surface part. An object of the present invention is to provide an extrusion processing apparatus capable of manufacturing an extrusion processing product of a desired size.

Means for Solving the Problems To achieve the above object, the extrusion processing apparatus of the present invention includes a die disposed at the front end of a container into which the extrusion material is loaded, and the die passes the extrusion material to form a predetermined shape. It has a die hole for forming an extruded material having a cross-sectional shape, and a part near the exit of this die hole is provided so that the extruded material moves laterally while guiding the outer surface of the extruded material immediately after passing through the die hole. The main feature is that a movable guide member is disposed at its guide portion to displace the material laterally with respect to the die hole.

Function In the extrusion processing apparatus described above, when the movable guide member displaces the outer surface guide portion of the extruded section immediately after extrusion laterally with respect to the die hole, the extruded material attempting to pass through the die hole
The speed of the extruded material flowing on the displacement side of the extruded section is relatively smaller than the speed of the extruded material flowing on the side opposite to the displacement side, and as a result, the extruded section is extruded. A bend is formed in the curve.

Embodiment Next, an embodiment of the extrusion processing apparatus of the present invention will be described based on the drawings.

In FIG. 1, (1) is a container, inside which is an extruded material (2) made of a metal material such as aluminum.
) is loaded, and the extrusion material (2) is extruded forward by the forward drive of a ram (3) disposed at the rear of the container (1). Note that (4) is a dummy block.

On the other hand, a die (5) is provided at the front end of the container (1). The dice (5) are the first dice (6) and the second dice.
The first die (6) is interposed between the second die (7) and the container (1).

The first die (6) is provided with an approach hole (8) whose cross-sectional area gradually decreases from the container (1) side toward the front, and the first die (6) allows the second die ( 7) is reinforced so that the second die (7) can withstand the extrusion load. Also, on the second die (7),
From the first die (6) side towards the front the bearing hole (9
) and a relief hole (10) are connected.

The first die (6) and the second die (7) are overlapped with each other to form the approach hole (8) and the bearing hole (
9) and the relief hole (lO) are positioned concentrically, forming the die hole (11) of the die (5). When the extruded material (2) in the container (1) receives a forward extrusion force, it first passes through the abutment hole (
8), its cross-sectional area is reduced by passing through the bearing hole (9) of the second die (7), and then formed into a predetermined cross-sectional shape by passing through the bearing hole (9) of the second die (7), and then the die (5) is passed through the relief hole (10). In front of the extruded section (1
2) and is extruded.

On the other hand, a movable guide member (13) is disposed near the exit of the die hole (11), that is, at a position immediately after exiting the relief portion (10) of the second die (7). This movable guide member (13) has a guide hole (
15) are perforated. Guide hole (15)
The extruded profile (12) is inserted through the die hole (11), and the outer surface of the extruded profile (12) is slidably guided by its inner surface. This movable guide member (13) is supported so as to be movable laterally with respect to the die hole (11), and its movement or movement distance can be electrically controlled, for example, by a control device (not shown). There is. Note that the area from the inner surface of the guide hole (I5) to the peripheral edges of its entrance and exit is a curved surface, and when the movable guide member (] 3) moves laterally, the area extends from the extruded shape member (12). ) so that the outer surface will not be damaged even if it hits the outer surface.

Next, the operating state of the extrusion processing apparatus having the above configuration will be explained. First, the ram (3) is driven to extrude the extruded material (2) from the die hole (11), and the extruded section (12) is inserted into the guide hole (15) of the movable guide member (13).

Then, the movable guide member (13) is moved laterally, and the outer surface portion of the extruded section (12) is pushed and displaced laterally on the inner surface of the guide hole (15). Then, the extruded material (2) that is about to pass through the die hole (11) is
The extrusion speed of the extrusion material (2) flowing on the displacement side of 2) is relatively smaller than the extrusion speed of the extrusion material (2) flowing on the opposite side to the displacement side, and as a result, the extrusion A bend will be formed in the profile (12). Note that the relationship between the amount of lateral movement of the movable guide member (13) and the radius of curvature of the bent portion of the extruded section (12) obtained at the position after the movement is determined in advance, and the movable guide member (13) is moved according to that relationship. By moving the guide member (13), a curved portion with a desired radius of curvature can be formed.

As described above, in the above embodiment, the movable guide member (13) is disposed at a position immediately after exiting the relief hole (10) in the die (5).
) on the inner surface of the guide hole (15) of the extruded shape immediately after extrusion (
The extruded material (12) is pushed and displaced laterally with respect to the die hole (11) while guiding the outer surface of the die hole (12). 11
), it is extruded as an extruded section (12) without bending. That is, by displacing the extruded section (12) laterally at a position immediately after passing through the die hole (11), the flow condition of the extruded material (2) extruded from the die hole (11) is changed. This forms a bend. Therefore, it is possible to produce an extruded product of a desired size and a curved portion with a desired radius of curvature without causing defects such as buckling, wrinkles, roughness, or cracks on the surface. .

In addition, since conventional extrusion processing equipment processes straight extruded shapes, it was necessary to extrude them to a predetermined length and then cut them due to space constraints, but in the above example, extruded shapes Since the material is extruded while forming curved portions, continuous extrusion can be made possible.

In addition, since the lateral movement distance of the movable guide member (13) can be adjusted as appropriate, it is possible to form curved parts with various radii of curvature in the extruded product, and
It is also possible to form multiple bends with different radii of curvature in one extruded product.

Furthermore, since the extrusion process and the bent part forming process are integrated, it is possible to improve the manufacturing efficiency of extruded products having bent parts.

Furthermore, in the above embodiment, the extruded section (12)
is extruded while being supported at two places, front and back of the die hole (11) and the guide hole (15), so when producing a straight extruded product,
By locating the guide hole (15) of the movable guide member (13) concentrically with the die hole (11), it is also possible to prevent unexpected bending from occurring in the extruded section (■2). can.

In addition, in the above embodiment, as a movable guide member,
A guide hole (15) is formed in the plate-shaped guide member main body (14).
), but it is not limited to this, and in short, it has a configuration that allows the extruded shape (12) to be displaced laterally immediately after passing through the die hole (11). If so, any type of movable guide member can be employed. Furthermore, in the above embodiment, the die, the
) is made up of a first die (6) and a second die (7), but this die can also be used with a similar approach hole (8), bearing hole (9), and relief hole (1).
It is also possible to configure it as one die with 0).

In accordance with the effects of the invention, the extrusion processing apparatus of the present invention includes a die disposed at the front end of a container into which the extrusion material is loaded, and the die passes the extrusion material to form a material having a predetermined cross-sectional shape. It has a die hole for forming an extruded shape, and a part near the exit of the die hole is provided with a die that moves laterally while guiding the outer surface of the extruded shape immediately after passing through the die hole, and guides the extruded shape. Since a movable guide member is disposed in the part of the extruded section, the movable guide member is moved laterally to move the guide part of the extruded shape laterally with respect to the die hole. When the extruded material attempts to pass through the die hole, the speed of the extruded material flowing on the displaced side of the extruded section is relatively smaller than the speed of the extruded material flowing on the side opposite to the displaced side. The extruded profile is then extruded, thereby forming a bend in the extruded profile. In other words, unlike the conventional method of forming a bent part in an extruded section by applying a bending force, the extruded section is forced out through the die hole by displacing the extruded section laterally at a position immediately after passing through the die hole. This changes the flow state of the extruded material, thereby forming a bend. Therefore, it is possible to produce an extruded product of a desired size and a bent portion with a desired radius of curvature without causing defects such as buckling, wrinkles, roughness, and cracks on the surface portion.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view showing an embodiment of an extrusion processing apparatus of the present invention. (1) Container, (2) Extruded material, (5)
...Dice, (11)...Dice hole, (12)...
- Extruded shape member, (13)...movable guide member. that's all

Claims (1)

[Claims] A die is disposed at the front end of the container into which the extruded material is loaded, and the die has a die hole through which the extruded material passes to form an extruded shape having a predetermined cross-sectional shape;
Near the exit of the die hole, the extruded section immediately after passing through the die hole is moved laterally while being guided, and the extruded section is displaced laterally with respect to the die hole at the guide portion. An extrusion processing device characterized by being provided with a movable guide member.