JP2790983B2 - Dies for manufacturing V-shaped or U-shaped extruded material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die for producing a V-shaped or U-shaped (including an inverted V-shaped or inverted U-shaped) extruded material made of aluminum or an alloy thereof.

[0002]

2. Description of the Related Art For example, a wide material such as a scaffold plate for a building is directly extruded, which results in an increase in the size of a die. In some cases, the extruded material is extruded and then developed into a linear cross section. Further, a member having a V-shaped or U-shaped cross section may be manufactured by extrusion without being limited to the one for the development processing.

[0003] Such an extruded material having a V-shaped or U-shaped cross section is generally produced using female and male porthole dies. A hollow extrusion hole having a peripheral wall having a V-shaped or U-shaped cross section is formed in the extrusion direction in the female die, while a V-shaped or U-shaped cross section projected in the extrusion direction is formed in the male die. A formed convex portion having a contour of a shape is formed, and the formed convex portion faces the extrusion hole in such a manner as to form a molding gap having a V-shaped or U-shaped cross section.

[0004] However, the conventional porthole die as described above has a drawback that the molding projection of the male die is easily bent by the extrusion pressure. For this reason, the width of the molding gap of the die through which the extruded material passes fluctuates, and as a result, the thickness of the extruded material fluctuates greatly, causing a problem of lack of shape stability.

[0005] Originally, in order to suppress the bending of the molded projections of the male die, measures such as increasing the thickness of the die and improving the mechanical strength have been taken, but they have not been sufficient.

The present invention has been made in view of such a technical background, and suppresses a variation in the width of a molding gap caused by a bending of a molding protrusion in a male die, thereby suppressing a variation in wall thickness. An object of the present invention is to provide a die capable of obtaining a V-shaped or U-shaped cross-section extruded material having excellent shape stability.

In order to achieve the above object, the present invention provides
Referring to the reference numerals in the drawings, a cross section of a V-shape or a U-shape comprising a combination of a female die (1) and a male die (3) is shown.
A die (A) for manufacturing a character-shaped extruded material (100), wherein a hollow extrusion hole (12) having a V-shaped or U-shaped cross section is formed in the female die (1) in the extrusion direction. The male die (3) has a V-shaped or U-shaped section protruding in the extrusion direction.
A forming convex part (31) having a character-shaped contour is formed, and this forming convex part (31) faces the extrusion hole (12) in such a manner as to form a V-shaped or U-shaped forming gap (4). The extruded material (100) has an opening (103) having a cross-sectional shape, and a tip base (36) of the molding projection (31) is formed with an extrusion hole (12) in the female die (1). ) Part of the circumference (14)
At the abutting portion, and at the abutting portion, the positioning fitting portions (19) (37) and the positioning fitting portions (19) (19) ( 37) Both width direction
Male and female dies that slope inward toward the extrusion direction
Inclined surface (20a)
) (38) are provided, and both fitting portions are connected to the distal end base portion (3).
Fitting the movement preventing state in the width direction of 6) together are Rutotomoni,
A gist for manufacturing a V-shaped or U-shaped extruded member, characterized in that both inclined surfaces are closely contacted with each other.

[0008]

In the extruding operation, even if a pressure is applied in the direction toward the contact surface of the molding protrusion (31) or in the width direction of the tip base (36) in the molding protrusion, the contact surface of the female mold and the male and female members are not affected. The molding protrusions can be supported by the fitting portions (19) and (37) of both the molds, and the bending of the molding protrusions is suppressed. Therefore, since the molding gap is maintained at a constant width, the thickness variation of the extruded material is reduced.

When the female die (1) and the male die (3) are combined, the fitting part (19)
It is only necessary to set them so that (37) is fitted, so that positioning of both can be easily performed. In the combined state, the molding gap (4) is automatically held at the desired width.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings.

The porthole dice shown in FIGS.
This is for manufacturing an aluminum extruded product (100) having an inverted V-shaped cross section as shown in FIG. This extruded material (10
In FIG. 7, a central curved portion (101) in a sectional shape is linearly developed as shown in FIG. 7 to be used as a scaffold for construction. The opening of a main body (102) having an inverted V-shaped cross section is used. The portion (103) has a pair of feet (104) (104) at both ends.

As shown in FIGS. 1 and 2, the die (A) comprises a thick circular female die (1) and a male die (3).

The female die (1) has a concave inflow portion (11) into which a molding material flows in the center of the joining surface, and the female die (1) is thickened at the center of the inflow portion (11). It has an extrusion hole (12) penetrating in the vertical direction (extrusion direction). The extrusion hole (12) is formed into a hollow hole having a V-shaped cross section corresponding to the shape of the main body (102) of the extruded material (100) by the arch-shaped side peripheral surface (13) and the bottom surface (14). I have. In the female die (1), molding gaps (15) and (15) for forming the foot (104) of the extruded material (100) are formed by communicating with the lower ends of the extrusion hole (12). Is formed. Also,
The arched side peripheral surface (13) of the extrusion hole (12) has a bearing portion (16) on the entry side and a relief portion (17) following the bearing portion (16) on the exit side.
The bottom surface (14) of the extrusion hole (12) has a flat contact surface (18) on the entry side, and the bearing portion (16)
At the position slightly out of the position of, the contact surface (1
8) The fitting protrusion (1
9) is formed. In addition, a step (20) projecting slightly higher than the contact surface (18) is formed on both sides of the fitting projection (19) in a direction orthogonal to the extrusion direction,
The entry side end surface of the step (20) is formed as an inclined surface (20a) inclined upward toward the exit side.

On the other hand, the male die (3) has a molding projection (31) projecting in the extrusion direction at the center thereof, and the male die (3) is provided with a male projection at a position around the molding projection (31). It has a plurality of molding material introduction holes (32) penetrating the mold die (3). The shaping projection (31) is formed in a triangular cross-section having an inverted V-shaped side peripheral surface (33) and a flat bottom surface (34) at the tip, and has a side peripheral surface (33).
A bearing portion (35) is formed on the inner side of the bearing portion (16) of the female die (1). Further, an opening (103) having a cross-sectional shape of the extruded material (100) is formed.
) Is formed at the tip base (36) of the molding projection (31).
The fitting recess (37) is formed by making a portion from the front surface to the bottom surface dug. The fitting recess (37) is formed in a hole shape that matches the sectional shape of the fitting projection (19) of the female die (1). In addition, in the width direction of the base portion (36) of the molding convex portion (31), on both sides of the fitting concave portion (37), the boundary between the bottom surface and the front surface is chamfered so that the inclined surface (38) is formed. ) Is formed.
The inclination angle of the inclined surface (38) is set to be the same as the inclined surface (20a) of the female die (1).

Thus, the female die (1) and the male die (3) are connected to the female joint surface (21) and the male joint surface (3).
9) are combined with each other in a matching direction, and fixed and integrated by fixing means (not shown), thereby forming a porthole die (A). When assembling the female die (1) and the male die (3), set the fitting recess (37) of the male molding projection (31) and the female fitting projection (19) to fit. And the combination work can be easily performed. In such a combined state, as shown in FIGS. 3 to 5, both ends of the male die (3) face the extrusion hole (12) of the female die (1) with the tip of the forming projection (31). The bearing portions (16) and (35) are arranged to face each other via an inverted V-shaped forming gap (4). The bottom surface of the base (36) of the molding protrusion (31) of the male die (3) is in contact with the bottom surface (1) of the extrusion hole (12) of the female die (1).
8) is supported in contact with the projections (31) to prevent downward bending of the projections (31) and to fit the recesses (37) of the projections (31).
The fitting protrusion (19) of the female die (1) and the fitting protrusion (19) fit tightly, so that the bending of the forming protrusion (31) in the width direction of the base (36) is prevented. Further, the base inclined surface (38) of the molding convex portion (31) and the step inclined surface (20a) of the female die (1) are in close contact with each other, so that the forward and backward directions (extending direction) of the male and female molds (1) and (3) are possible. ) Is determined. In this manner, the female die (1) and the male die (3) are properly positioned in a desired positional relationship, and the molding gap (4) is set to an appropriate value equal to the thickness of the extruded material (100). Is secured.

In this state, the aluminum billet loaded in the container of the extruder flows into the molding material introduction hole (32) of the male die (3) by pressurization by the stem. The molding material that has flowed into the introduction hole once merges here through the inflow portion (11) of the female die (1), and then the bearing portion (16) of the male and female die (1) (3).
The extruded material shown in FIG. 6 is obtained as a result of being extruded from the forming gap (4) between (35) and the foot forming gap (15) provided in the female die (1).

During the above extrusion, the molding protrusion (31) receives a downward pressure or a pressure in the width direction of the base (36), but the base (36) bottom surface of the molding protrusion is in contact with the female die (1). The fitting recess (37) of the molding projection (31) and the fitting projection (19) of the female die (1) are supported by the surface (18), and extend in the width direction of the base (36). Since the molding protrusion (31) is fitted exactly in the deformation movement preventing state, the molding protrusion (31) extends in the direction in which the molding gap (4) expands or contracts.
Does not bend. Therefore, the molding gap (4) is always kept constant throughout the extrusion process.

In the above embodiment, the case of manufacturing an extruded material (100) having an inverted V-shaped cross section has been described. However, the same applies to a die of an extruded material having a U-shaped or inverted U-shaped cross section. Applicable to

[0019]

According to the present invention, as described above, the base of the leading end of the molding projection forming the opening of the cross-sectional shape of the extruded material is brought into contact with a part of the peripheral surface of the extrusion hole in the female die. In addition to being supported, a positioning fitting portion is provided on the peripheral surface and the molding convex portion at the contact portion, and both fitting portions are fitted in a state where the distal end base portion is prevented from moving in the width direction. It is characterized by the following. Therefore, upon extrusion, even if a pressure is applied in the direction in which the forming convex portion is directed toward the contact surface, or a pressure in the width direction of the distal end base portion of the forming convex portion, the female projecting contact surface and the fitting portion of the male and female molds are engaged. The molded protrusion can be supported, and the bending of the molded protrusion can be suppressed. As a result, the molding gap can be maintained at a constant width, so that the thickness variation of the extruded material can be reduced. Moreover, the strength of the molded protrusions for forming the convex portion of the male die is supported by the female die can be designed low strength of the male die itself by reducing the thickness of this was because the extrusion direction. For this reason, the required extrusion pressure can be reduced, which means that the pressure applied to the male mold projection during extrusion is reduced, and the deflection of the mold projection can be further suppressed.
As a result, an extruded material having excellent shape stability can be manufactured, and the life of the die can be increased by suppressing the bending of the molded projection.

In addition, when the female die and the male die are combined, it is only necessary to set the fitting portions of both the male and female dies so that the positioning of the both dies can be easily performed. In this state, the molding gap can be automatically maintained at a desired width. For this reason, there is an effect that the combination work can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a female die and a male die separated from each other.

FIG. 2 is a perspective view showing a main part of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1 in a state where the female die and the male die are combined.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a sectional view taken along line VV of FIG. 3;

FIG. 6 is a sectional view of an extruded material extruded by the dies of FIGS. 1 to 5;

7 is a cross-sectional view of a state where the extruded material of FIG. 6 has been developed.

[Explanation of symbols]

 A: Die 1: Female die 12: Extruded hole 14: Bottom 18: Contact surface 19: Fitting protrusion (fitting part) 3: Male die 31: Molding convex part 36: Tip base 37: Fitting concave part ( Fitting part) 4: Molding gap 100: Extruded material 103: Opening

Claims (1)

(57) [Claims] 1. A V-shaped or U-shaped extruded material (10) comprising a combination of a female die (1) and a male die (3).
0) wherein the female die (1) has a hollow extrusion hole (12) having a V-shaped or U-shaped cross section.
Is formed in the extrusion direction, while the male die (3) is formed with a molding projection (31) having a V-shaped or U-shaped cross section projecting in the extrusion direction. 31)
Are exposed to the extrusion hole (12) so as to form a V-shaped or U-shaped molding gap (4), and an opening (103) having a cross-sectional shape of the extruded material (100).
The tip base portion (36) of the forming convex portion (31) that forms the part (1) of the peripheral surface of the extrusion hole (12) in the female die (1).
While being supported by the abutment by 4), the fitting portion for positioning the circumferential surface in contact sites (14) forming protrusions (31) (19) (37) and both said engaging portion (19 ) (37) width
Male and female inclined inward in the extrusion direction on both sides
Inclined surface for positioning the dies (1) and (3) in the front-rear direction
(20a) (38) is provided, both the fitting portion is fitted in the movement preventing state in the width direction of the front end base portion (36) Rutotomo
A die for producing a V-shaped or U-shaped extruded member, characterized in that both inclined surfaces are closely contacted with each other.