JP2894536B2 - Extrusion Press Die Equipment - 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 apparatus for an extrusion press for a metal such as an aluminum alloy.
In particular, attention was paid to the shape of the container-side end surface of the die device.

[0002]

2. Description of the Related Art Conventionally, in an extrusion press, a shearing device for cutting a disc card is provided on a frame provided on a container side above an end platen holding a die. That is, when the extrusion operation is completed, the container is retracted and separated from the die, and the disc card, which is the remaining portion of the billet in the container, is exposed to the air, and the shear blade is flush with the die device. It was lowered along the end face of the container, and the discard sticking to the end face of the die was scraped off with a shear blade and cut off from the extruded product on the die side by shearing.

[0003] Conventionally, in order to prevent air from being trapped in an extruded product as much as possible and to prevent blisters from being generated, the air in the container is subjected to the die of the container when upsetting at the beginning of the extrusion operation. It has also been considered to deaerate from the contact surface side by the action of a vacuum suction device or the like. In this case, a small gap is provided between the front end surface of the container and the dice device, and the seal ring provided on the front side of the container is a seal ring surface on the outer peripheral side, which is a part of the surface that is flush with the dice device. Had been degassed in contact with the

[0004]

In such an apparatus, when the disk card attached to the die surface is shaved off with a shear blade, the container-side end surface of the die ring provided on the outer peripheral surface of the die and the die surface are removed. Because they were almost on the same plane,
As the shearing blade is continuously and repeatedly cut by the shear blade, the aluminum deposits remaining on the die surface grow and the outer diameter in the vertical direction increases, and as shown in FIG. Thin aluminum cake called shell is also attached to the contact surface.

[0005] That is, when cutting a discard card with a shear blade, the shear blade descends along the discard surface,
Rise. After that, container sealing is performed. When these are repeated, the shell expands mainly up and down as the shear blade reciprocates on the die surface. The aluminum cake adhering to the shear blade contacts the container-side end surface of the die ring,
Adhere to. Performing a container seal further expands the shell. The shell is gradually generated above and below the die ring surface by continuously repeating the action of the above.

In FIG. 8, reference numeral 2 denotes a die device, which is a die 2a, a die backer 2b, a die 2a and a die backer 2a.
b and a bolster 2
d and the like. Die 2a and die ring 2c
Are flush with each other. The end face of the die ring 2c becomes the contact face of the seal ring. 14 is a shear blade, 3
Reference numeral 0 denotes a shell formed on the entire surface of the die 2a and the die ring 2c.

As described above, if the shell 30 adheres to the contact surface of the seal ring, the seal due to the contact of the seal ring becomes insufficient, and as a result, air enters from here upon deaeration, and sufficient deaeration cannot be performed. , Good extruded products cannot be obtained. Further, in such a device, when the shear blade descends, the seal ring contact surface of the die ring may be erroneously damaged.

Further, when a shell is formed up to the die ring surface, the shell adheres to the container sealing surface, and generally adheres non-uniformly. Therefore, during the extrusion operation, the container seals on it with relatively large force,
Hanasaki phenomenon occurs. Also, the container cannot be sealed in parallel with the die surface, and there is a high possibility that an operation trouble will occur. The shear blade does not cut the shell attached to the die ring, but runs on the surface of the shell. Therefore, it is impossible to cut one very thin film such as 0 to 0.3 mm. Typically, shells are 0.3-1 mm thick. If the shell becomes unusually thick, it is necessary to remove the shell.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve such a drawback. According to the present invention, in a die device of an extrusion press, in which a shear blade of a disc card cutting device is provided so as to be movable in a direction perpendicular to an axis of an extrusion direction at an end surface of a container side of the die, a die is fitted at an outer peripheral portion of the die. A tapering surface on the inner periphery and a ring surface on the outer periphery perpendicular to the axis of the extrusion direction are provided on the container-side end surface of the supporting die ring. The structure was drawn in the extrusion direction. In addition, the die ring-side end surface of the seal ring, which is attached to the outer ring mounted on the die-side end surface of the container tire so as to be movable in the axial direction and cannot be detached, is connected to the outer ring surface portion of the die ring on the container side. To be able to be pressed.

[0010]

[Function] When performing extrusion work, first, a small gap is provided between the front surface of the container and the die surface, and the seal ring attached to the front surface of the container is pressed against the die ring to seal the container. The billet put in is pushed up by the extrusion stem and upset. At this time, the air in the container is evacuated by vacuum suction from the seal ring. Thereafter, the container is applied to the die, and the billet is extruded from the hole of the die by the advance action of the extrusion stem, and the extrusion operation is continued. After the extruding operation is completed, the container and the extruding stem are retracted, and the discard, which is the billet pressed cake remaining on the front of the die, is exposed to the air. In this state, the shear blade of the disk card cutting device is lowered, and the disk card is cut off from the extruded product by cutting at the front part of the die.

At this time, since the container-side end surface of the die ring provided on the outer periphery of the die is composed of the inner peripheral side tapered surface portion and the outer peripheral ring surface portion which is slightly retracted in the pushing direction, the shear blade is not used. The shearing action is performed smoothly without hitting the outer peripheral end of the die ring. Also, if a die with such a shape is used,
The generated shell does not adhere to the entire surface of the die and die.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a main part of an extrusion press shown in a partial cross-sectional view, FIG. 2 is a vertical cross-sectional view showing a positional relationship between a die device and a container in a degassed state, and FIG. FIG. 4 is a partially enlarged cross-sectional view of FIG. 3, FIG. 5 is a rear view of the shear and the guide device as viewed from the die slide side, FIG. 6 is a vertical cross-sectional view showing a main part of the present invention,
FIG. 7 is a partially enlarged view of FIG. In FIG. 1, 1 is an end platen, 2 is a dice device, 3 is a die slide,
Reference numerals 4 and 5 denote guide members for guiding the horizontal movement of the die slide 3 in a direction perpendicular to the paper surface. Reference numeral 6 denotes a block in the end platen 1 which receives a pressing force from the die device 2. The block 6 and the center of the end platen 1 are provided with holes through which products extruded from the die device 2 pass. As shown in FIG. 2 and FIGS. 6 to 8, the die device 2 is composed of several parts such as a die 2a, a die backer 2b, a die ring 2c, and a bolster 2d. Reference numeral 7 denotes a container including a container tube 7a, a container body 7b, a container holder 7c, and the like.

A frame 8 is mounted on the container 7 above the end platen which holds the die device 2 on the front side, and a shear cylinder device 10 for cutting a disc card is mounted on a part of the frame 8 by a shaft 9. Was mounted rotatably in the extrusion and anti-extrusion directions. Shear cylinder device 10
In the figure, 11 is a shear cylinder, 12 is a piston rod, and a shear slide 13 is attached to the lower end of the piston rod 12.

A shear blade 14 is attached to the center of the inside of the shear slide 13 in a downward direction. Guide rollers 15 are die-slid on both sides of the shear blade 14 of the shear slide 13 as shown in FIGS. Several pieces were arranged in the vertical direction on the three sides, and each was rotatably mounted. 15a is a bearing integrally provided on the die slide 3 side of the shear slide 13;
b is a shaft that rotatably supports the guide roller 15. The surface of the shear blade 14 on the die 2 side and the guide roller 15
The horizontal distance between the surfaces on the side of the die slide 3 is kept at a predetermined constant distance. The lower end of the guide roller 15 is higher than the lower end of the shear blade 14 by, for example, the dice device 2.
Is positioned below by a radius or diameter.

A pressing device for swinging the shear cylinder device 10 about the shaft 9 or adjusting the clearance between the shear blade 14 and the front surface of the die device 2 is provided on a part of the upper side of the frame 8. However, the tilting cylinder 16 was attached, and the tip of the piston rod 17 of the cylinder 16 was attached to a part of the shear cylinder 11. The mounting positions of the cylinder 16 and the piston rod 17 were considerably higher than the position of the shaft 9. In the hydraulic circuit for the cylinder 16, an electromagnetic relief valve (not shown) is provided, and the pressure is appropriately controlled so that the clearance between the die surface and the shear surface is considerably small, for example, 0 to 0.3 mm. Can be adjusted and set in advance to an appropriate value.

As shown in FIG. 4, the step of the die ring 2c in the direction opposite to the extrusion direction is slightly smaller than the direction of the extrusion direction to form a step. Inside, a hose shoe 18 capable of holding the die ring 2c at the step portion is provided. A disc spring 19 was provided between the back surface of the hose shoe 18 and the bottom of the hose shoe mounting groove 3a of the die slide 3, and the hose shoe 18 was attached to the die slide 3 with bolts 20.

Therefore, the hose shoe 18 is normally slightly pushed to the right in FIG. 4, and the back surface of the hose shoe 18 is slightly away from the bottom of the groove 3a by the action of the disc spring 19,
When pressed from the right side in FIG.
9 to move toward the bottom of the groove 3a and stop at the bottom.

A guide plate 21 is fixed to the hose shoe 18 and moves up and down while the guide roller 15 is pressed against the surface of the guide plate 21. Therefore, it can be said that the guide roller 15 device is a guide device that can press the dice device 2 toward the end platen 1 via the hose shoe 18. The container 7 at the upper end of the guide plate 21 has a tapered notch so that when the guide roller 15 descends, the guide plate 21 starts to smoothly and smoothly hit the container 7 side. is there.

In the shear cylinder device 10 shown in FIG. 1, 22 is a moving member provided integrally with the piston rod 12, 22a and 22b are detection rods provided above and below the moving member 22, respectively. A bracket integrally and directly or indirectly attached via a member 25 above and below the shear cylinder 11, respectively.
On the lower part of the bracket and on the upper part of the bracket 24,
For example, position detecting devices 26 and 27 such as limit switches and magnetic sensors are attached, and the ascending and descending limits of the shear slide 13 and the piston rod 12 to which the shear blade 14 and the guide roller 15 are attached, respectively, can be transmitted. Like that.

As shown in FIGS. 2, 6, and 7, in the die device 2, an inner peripheral surface of a die ring 2c, which is fitted and supported on the outer periphery of the die 2a, is attached to an end surface 31 of the die ring 2c on the container 7 side. A tapered ring surface 32 on the side and an outer peripheral ring surface portion 33 perpendicular to the axis of the extrusion direction are provided, and the outer peripheral ring surface portion 33 is retracted in the extrusion direction from the container 7 side end surface 34 of the die 2a. .

Specifically, for example, as shown in FIG.
The ring surface 33 is retracted from the end surface 34 of the die 2a on the container 7 side by a = 1 to 2 mm, and the inclination angle θ of the tapered ring surface 32 is set to about 10 to 15 degrees. In addition, die ring 2
The inner peripheral side of the tapered surface 32 of c is slightly vertical,
The die 2a may be retracted only slightly from the end surface 34 on the container 7 side. Of course, the tapered surface 32 can be raised immediately from the inner peripheral end of the die ring 2c, and the inner peripheral end can be made flush with the container 7 side end surface 34 of the die 2a.

Normally, the outer diameter of the end surface of the container tube 7a on the die 2a side is made substantially the same as the outer diameter of the vertical surface on the inner peripheral side of the tapered surface 32 of the die ring 2c, and during the extrusion operation, 2a of container tube 7a
The end surface of the die 2a is pressed against the container 7 side end surface 34 of the die 2a and the inner peripheral vertical surface of the die ring 2c with a relatively large force.

As shown in FIG. 2, an outer ring 35 concentric with the container 7 is attached to an end face of the container body 7b on the die device 2 side by bolts. A seal ring 36 is provided on the inner circumference of the outer ring 35 so as to be able to move back and forth in the axial direction and to be engaged in a step-like manner so as not to be detached. Part of the seal ring 36 has a structure having a protrusion 36a protruding in the center direction. When the container 7 is temporarily stopped while leaving a gap 37 of, for example, 2 to 3 mm between the container 7 and the die 2a, The projecting portion 36 of the seal ring 36 is
a is pressed and contacted in the pushing direction by the action of eight compression springs 38 provided at equal intervals in the circumferential direction between the container body 7b and the seal ring 36, and the clearance is made zero by the face seal. Has become.

Above the seal ring 36, two deaeration holes 39 are provided. The deaeration holes 39 are provided through a vacuum suction pipe 40 and an electromagnetic switching valve 41 to a vacuum tank 42 and a vacuum pump 4.
3 is connected. In addition, 44 is a motor and 45 is a vacuum pressure gauge. 46 is a heat-resistant sealing material for preventing air from entering between the outer ring 35 and the seal ring 36;
Is a metal hollow ring for preventing air from entering between the outer ring 35 and the container body 7b. A replaceable seal plate 36b for preventing wear and air intrusion due to repeated contact with the die ring 2c is attached to the protrusion 36a of the seal ring 36. In addition, 48 is a billet put in the container 7, S is a container tube 7
This is a gap between a and the billet 48 before the upset.

Next, the operation of this device will be described.
When performing the extrusion operation, first, a small gap 37 of, for example, 2 to 3 mm is provided between the front surface of the container 7 and the die device 2.
The container 7 is stopped in a state in which is provided. At this time, FIG.
Since the seal ring 36 is pressed by the compression spring 38 as shown in FIG.
Is brought into contact with the ring surface 33. In this state, container 7
A billet 48 is inserted into the inside.

Next, the vacuum pump 43 is operated to evacuate the container 7 from the deaeration hole 39 by vacuum suction, and the extruding stem and the dummy block (not shown) are advanced and the billet 48 is pushed. Upset.
When the upset is completed, the degassing in the container 7 has been sufficiently completed. Next, the container 7 is completely brought into contact with the die device 2, the extrusion stem and the dummy block are advanced, and the billet 4 is extruded from the hole of the die 2a to form an extruded product.

After the extruding operation is completed, as shown in FIG. 1, the container 7 and the extruding stem are retracted, and the discard which is the pressed cake of the billet 48 remaining on the front surface of the die 2a is exposed to the air. In this state, the shear blade 14 of the shear cylinder device 10 is lowered, and the disc card is cut off at the front surface of the die 2a on the container 7 side to separate it from the extruded product.

At the time of cutting, the shear cylinder 11 is operated, and the shear slide 13 is lowered. Then, first, the guide roller 15 hits the surface of the guide plate 21 and continues to descend in that state. When the guide roller 15 hits the guide plate 21, the hose shoe 18 is
Is slightly pushed in the extrusion direction overcoming this force, and the step portion of the die ring 2c is pushed by the hose shroud 18 accordingly.
The die ring 2c and the die 2a are pressed against the block 6 on the end platen 1 side, and the front surface of the die device 2 is in a desired fixed position. This is performed before cutting by the shear blade 14.

While maintaining this state, the guide roller 15
At the same time, the shear blade 14 descends, and the disk card is cut by the shear blade 14 soon. At this time, the guide roller 15
The horizontal distance between the end platen 1 side surface and the cutting surface of the shear blade 14 on the end platen 1 side is adjusted to an appropriate constant distance in advance. Therefore, the distance between the end surface of the die device 2 and the surface of the shear blade 14 is, for example, 0 to 0.3 mm.
Is maintained at a constant clearance.

By adjusting the hydraulic pressure of the cylinder 16, the pressing force of the guide roller 15 and the shear blade 14 against the end platen 1 is adjusted to a desired value. Therefore, the discard card is always cut in a good condition on a smooth cut surface without peeling or the like without leaving a constant film, for example, a shell 30 of, for example, 0 to 0.3 mm. As a result, entrainment of air and generation of blisters are also eliminated.

Conventionally, the die ring 2c and the die 2
The surface of the container 7 on the side a was flush,
Although the shell 30 was formed on the entire surface including the c, in the present apparatus, the container 7 side end surface of the die ring 2c was provided with an inner peripheral side tapered surface 32 and an outer peripheral side ring surface 33 so as to extend in the pushing direction. The shell 30 is not formed in the retracted portion because it is retracted. Therefore, the sealing effect on the ring surface 33 does not deteriorate.

Since the ring surface 33 is drawn from the die 2a surface and the tapered ring surface 32 is provided on the inner peripheral side of the ring surface 33, the set position of the shear blade 14 should be set to the die device 2 side. Even if it is a little too close, it descends smoothly and good shear can be obtained every time.

In this device, the position where the piston rod 17 of the cylinder 16 is attached to the shear cylinder 11 is
Since the rotation shaft 9 is provided at a position which is considerably higher than the position of the shaft 9 which is the swing center axis and does not receive the reaction force of the shear cylinder 11 by the tilting cylinder 16, the die 2a
The force for pressing the end face of the device can be easily controlled by pressure control using an electromagnetic relief valve or the like. As a result, shear blade 1
The cut surface on the die side due to the shear slide reaction force, which is seen when the angle 4 is an acute angle, is eliminated, and the die side cut surface without irregularities can be easily obtained.

Further, the die device 2 is pressed by the roller guide provided on the shear slide 13 via the guide plate 21 and the hose shoe 18 at the time of shearing, thereby changing the temperature of the die 2a, the clearance for inserting the die receiver, and the like. The card can be cut while keeping the clearance between the surface of the die 2a and the surface of the shear blade 14 at a value set in advance by adjustment without being affected by the above factors. Therefore, as described above, since the thickness of the aluminum alloy or the like remaining on the die 2a can be made constant, a uniform flat die-side cut surface can be obtained. Further, for the above-mentioned reason, it is possible to prevent the blister from being wound around the extruded product due to the defective cut surface on the die side.

FIG. 3 shows a state in which the cutting of the disk card has been completed. When the cutting of the disk card is completed, the cylinder 16 is actuated to slightly rotate the shear cylinder device 10, the guide roller 15 is separated from the guide plate 21, and the guide roller 15 is separated from the guide roller 15 while the shear cylinder device 10 is slightly inclined. Raise the shear blade 14. Then, the cylinder 16 is operated at the ascending limit to return the shear cylinder device 10 to the vertical state, and one cycle is completed.

[0036]

According to the present invention, in a die apparatus of an extrusion press, a shear blade of a disc card cutting device is provided so as to be movable in a direction perpendicular to an axis of an extrusion direction at an end face of a container side of the die. An inner taper ring surface and an outer ring surface perpendicular to the axis of the extrusion direction are provided on the container side end surface of the die ring that supports the dice with the die, and the outer ring surface is attached to the die. Since the structure is such that it is drawn in the extrusion direction from the container side end surface, no shell is generated on the container side end surface of the die ring.

Further, the die ring-side end surface of the seal ring, which is movably mounted in the axial direction with respect to the outer ring mounted on the die-side end surface of the container tire and is not detachable, is connected to the outer periphery of the die ring on the container side. Since it is provided so as to be able to be pressed against the side ring surface portion, the inside of the container can be sufficiently degassed at the time of upset, and an extruded product without air entrapment or blister can be obtained. In this case, no shell is formed on the container-side end surface of the die ring, so that the sealing at this portion is performed satisfactorily, and the deaeration is performed satisfactorily every time.

Since the outer peripheral ring surface, which is the seal ring contact surface of the container side end surface of the die ring, is drawn in from the die surface, the seal ring contact surface of the die ring is damaged by the shear blade when cutting the disc card. Nothing. If the dicing device is used together with the tilting shear device, the guide roller of the tilting shear device should be used.
Since the die is pressed down, the shear blade does not enter the extrusion direction side from the tapered portion of the die ring. Therefore,
When cutting the card, the shear blade does not damage the seal ring contact surface of the die ring.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of an extrusion press shown in a partial sectional view showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing one embodiment of the present invention showing a positional relationship between a dice device and a container in a degassed state.

FIG. 3 is a longitudinal sectional view showing a state immediately after cutting a disk card.

FIG. 4 is a partially enlarged transverse sectional view of FIG. 3;

FIG. 5 is a rear view of the shear and guide device of the device shown in FIG. 1 as viewed from a die slide side.

FIG. 6 is a longitudinal sectional view showing a main part of the present invention.

FIG. 7 is a partially enlarged view of FIG. 6;

FIG. 8 is a longitudinal sectional view showing an example of a conventional device similar to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 end platen 2 dice device 2a dice 2c die ring 7 container 8 frame 10 shear cylinder device 11 shear cylinder 13 shear slide 14 shear blade 15 guide roller (guide device) 16 tilting cylinder (pressing device) 18 hosesh 19 disc spring 21 Guide plate 30 Shell 31 Container-side end surface of die ring 2c 32 Tapered ring surface 33 Ring surface of outer peripheral portion 34 Container-side end surface of die 2a 35 Outer ring 36 Seal ring 39 Deaeration hole 43 Vacuum pump 48 Billet

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B21C 25/02 B21C 27/04

Claims (2)

(57) [Claims] 1. A die device of an extrusion press in which a shear blade of a disk card cutting device is provided so as to be movable in a direction perpendicular to an axis of an extrusion direction at an end surface of a container side of the die. A tapering surface on the inner periphery and a ring surface on the outer periphery perpendicular to the axis of the extrusion direction are provided on the container-side end surface of the supporting die ring. Extrusion press die device with a structure drawn in the extrusion direction. 2. An outer ring mounted on a die-side end surface of a container tire is movable in an axial direction with respect to an outer ring, and
2. The extrusion press die apparatus according to claim 1, wherein the die ring-side end surface of the seal ring which is non-removably attached is provided so as to be pressed against the outer peripheral ring surface portion of the die ring on the container side.