JP2882564B2 - Billet insertion device for extrusion press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion press, and more particularly to an improved extrusion press billet insertion device for smoothly loading a billet into a container.

[0002]

2. Description of the Related Art In an extrusion press, a billet is charged into a fixed container, extruded by a stem driven by a ram cylinder, and formed into a predetermined sectional shape by a die attached to an outlet of the container. Has become. The billet loaded into such a molding machine is supplied by a billet loader. The billet sent from a billet carrier arranged on the side of the molding machine is grasped one by one, and the billet of the container is grasped. It is configured to be transferred to a loading port, sent out by a stem in a state where the billet and the loading port are aligned, loaded into a container, and extruded and pressed to be formed.

[0003]

However, the conventional apparatus has the following problems. That is, in general, the billet loading opening of the container is set to be 5 to 10 mm larger than the billet outer diameter so that the billet for the aluminum alloy can be easily loaded into the billet loading opening of the container. The reason for this is that when the dimensional difference between the billet loading diameter of the container and the billet outer diameter is smaller than 5 to 10 mm, the axis of the billet loading port of the container and the billet are not aligned because they are misaligned. In some cases, a so-called donut phenomenon occurs in which the billet tip portion is caught near the billet loading port of the container or in the middle of loading the container and the billet expands.

In some cases, the billet is caught inside the container while entering the billet insertion port deeply, and is upset before the tip of the billet reaches the die. When such a trouble occurs, the idle time becomes longer even if the extrusion press operation is stopped or the extrusion is performed as it is. Further, as described above, when the billet loading diameter of the container is 5 to 10 mm larger than the billet outer diameter,
The upset stroke at the time of upset increases, and in particular, a blister (air entrainment) is performed by a so-called backflow in which air or impurities remaining in the outer skin portion of the rear periphery of the billet during upset are drawn into the product extruded material as the extrusion stem advances. ) Occurs.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the difference between the billet loading diameter of a container and the billet outer diameter even when the billet shaft core and the loading port are not opened. An object of the present invention is to provide a billet insertion device of an extrusion press in which the axes are aligned.

[0006]

According to the present invention, there is provided a billet loader provided in a billet loader, which holds a billet and is capable of entering and exiting between a container and an extrusion stem. Adjusting means provided radially from the outside of the billet; and a plurality of billet conveying rollers disposed above the adjusting means and conveying the billet in the axial direction of the container, the billet shaft. A plurality of rows are provided in the core direction, and a billet guide roller capable of holding and transporting the billet coaxially with the axis of the container is provided at the entrance of the container on the billet insertion side via an adjusting means.

[0007]

When the billet having a small difference in size from the billet loading port of the container is moved to the loading port of the container while being placed on the billet loader, the billet is loaded onto the container by the dummy block through the stem through the stem. The billet transfer roller and the billet guide roller provided at the inlet of the billet loading port of the container following the billet loading position and the billet loading port of the container and both cores of the billet even during the movement. Are loaded so as to continuously match, so that the upset can be performed smoothly and quickly without exhibiting the donut phenomenon.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the billet insertion device for an extrusion press according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side sectional view showing an embodiment of the present invention, in which a billet is loaded, and FIG. 2 is a sectional view of FIG.
FIG. 3 is a configuration diagram of a guide roller as viewed from BB in FIG. 1, and FIG. 4 is a front view of a main part showing a state of support of the billet by the guide roller. 5 is a main part front view showing the state of support of the billet by the conveying roller and the clamping roller, FIG. 6 is a main part side view showing the up and down movement of the billet conveying roller when passing through the billet and the fix dam block, It is explanatory drawing which shows the up-down movement of the roller for billet conveyance by the diameter difference of a billet and a fixture dam block.

Reference numeral 1 denotes a cylindrical container, which is detachably mounted in a container holder 2. On the outer periphery of the container 1 inside the container holder 2,
A heater 3 is provided, and a heat insulating material 4 is interposed between the heater 3 and the container holder 2. Further, a liner 5 provided with a billet loading port 6 is integrally provided on the inner peripheral surface of the container 1, and a billet 8 as a molding material is provided in a cylindrical space in the liner 5 in a ram cylinder (not shown). Is inserted into the billet loading port 6 and extruded from the die 12 to perform extrusion molding. Note that reference numeral 11 denotes a fixture dam block.

At four corners around the container 1, tie rods 14 are provided.
Are provided to support the pressing force during molding. The billet loader 16 is no. 1 billet loader 16
a and No. It is composed of a two-bilette loader 16b and transfers and supplies the billet 8 as a molding material to the billet loading port 6 of the liner 5, which is controlled by a billet carrier 20 installed on one side of the molding machine. The billets 8 to be sent are gripped one by one and lifted and moved to the billet loading port 6 of the container 1. In addition, No. No. 1 billet loader 16a and No. 1 billet loader. 2
The billet loader 16b has the same configuration.

The billet 8 is moved by the billet carrier 20.
Are supplied one by one to the lower position of the container 1, and the billet loader 16 is configured to hold the container and transfer it to the billet loading port 6. To this end, the billet loader 16 is arranged to face the billet carrier 20 and includes a swing arm 22 that is formed to be pivotable along a plane perpendicular to the extrusion center line of the molding machine.

More specifically, one end of the swing arm 22 is pivotally connected to a turning center shaft 24 disposed outside the lower tie rod 14 of the molding machine.
The tie rod 14 is bent in a V-shape so as not to interfere with the tie rod 4 and extends below the container 1 from below the tie rod 14.
The tip of the swing arm 22 is set to reciprocate between the mounting table 26 of the billet carrier 20 and the billet loading port 6 of the container 1 by a swing operation.

In order to perform a swing operation, a hydraulic drive cylinder device 28 is connected to the swing arm 22,
The swing arm 22 is driven by the expansion and contraction operation.

A billet holding portion 30 for holding the billet 8 is attached to the tip of the swing arm 22. The billet holding portion 30 further includes a pair of left and right pivots as shown in FIG. The billet conveying roller device 31 including one set of the billet conveying rollers 32 (32R, 32L) is disposed at a distance of one foot in the axial direction of the billet 8 (six sets in this embodiment as shown in FIG. 1). Has been established.

The billet holding section 30 has a pedestal 34 for supporting the lower surface of the billet 8 at the container loading position. A bearing 36 is provided on the inner wall of the pedestal 34 via a liner (not shown) so as to be vertically movable. ing. A plurality of (four in this embodiment) position adjusting bolts 38 are provided below the bearing 36 that rotatably supports the billet conveying roller 32. Is fixed to the lower part of the bearing 36,
The pedestal 34 is vertically movably inserted.

Further, a spring 40 is mounted on the outer periphery of the position adjusting bolt 38 between the pedestal 34 and the bearing 36,
The bearing 36 is configured to be constantly pressed in the billet 8 direction. On the upper part of the pedestal 34, a billet 8 placed on a billet transport roller 32 (32R, 32L) is provided.
In order to stably hold the guide liner 4 having a substantially V-shaped expansion.
2 is fixed.

On the other hand, a pair of brackets 43 (43a, 43b) are arranged on the side wall surface of the swing arm 22 apart from each other. A cylinder body 44a of one hydraulic drive cylinder 44 is pivotally mounted, and a substantially L-shaped lever 46 is attached to the other bracket 43b.
Are supported by a support shaft 46a. The lever 46
A clamp roller device 47 having the same configuration as that of the billet transport roller device 31 is disposed at the tip of the lever 46. (1) The rod 44b of the hydraulic drive cylinder 44 is pivotally driven, and the clamp roller 48 is moved by the expansion and contraction of the rod 44b.
2 from a clamp position (not shown) cooperating with the slide lever 2 to a clamp release position indicated by a chain line in FIG. The clamp roller device 47 has the same configuration as the billet transport roller device 31, and includes a pedestal 48a, a bearing 48b, a position adjusting bolt 48c, and a spring 48d.

At the time of clamping from above billet 8 with clamping roller 48 by clamping roller device 47,
A billet transporting roller 32 that is lower when the billet 8 is received from the billet carrier 20 in the billet holding unit 30, and a support plate 50 for receiving the billet 8 from the billet carrier 20 and lifting the billet 8 from the billet carrier 20. And at least two points are held by
The billet 8 is prevented from falling off during the transfer between the mounting table 26 of the billet carrier 20 and the billet loading port 6 of the liner 5.

In the embodiment, the above-mentioned No. While being placed on the one billet loader 16a, the clamp roller 4
When the stem 10 is advanced in a state where it is lightly clamped so as not to be dropped by the billet 8, the billet 8 is moved to the inlet of the billet loading port 6 of the liner 5, and then the billet 8 is smoothly loaded into the billet loading port 6. As described above, a donut-shaped holding plate 51 having a constant thickness is mounted on the stem 10 side of the container 1. The through-hole 51a of the holding plate 51
Is provided with a billet guide roller device 52.

As shown in FIG. 3, the billet guide roller device 52 is formed as a set of four such that the billet 8 is radially opposed to the billet 8 from outside.
The billet guide roller device 52 has the same configuration as the billet transport roller device 31, and includes a pedestal 54, a bearing 56,
It comprises a guide roller 58, a position adjusting bolt 60, and a spring 62.

The billet guide roller device 52 cooperates with the billet transport roller device 31 to hold the billet 8 coaxially with the billet loading port 6 of the container liner 5 so that the billet 8 and the billet loading port 6 are constantly held. It is configured to smoothly load while supporting so as to be concentric with the above.

The operation of the billet insertion device of the extrusion press configured as described above is as follows. First, the billet transport rollers 32R and 32L, the clamp roller device 47
In addition, the position adjusting bolts 38, 48c, and 60 disposed on each of the billet guide roller devices 52 are rotated with a spanner or the like to adjust the billet 8 and the billet loading port 12 so that they are concentric. . Then, No. The two billet loader 16b is raised to the forward limit position (the position of the charging port 6 of the billet 8) and is positioned at the front end face of the container 1.

By the way, no. No. 1 billet loader 16a has no. The swing arm 2 is moved by extending and retracting the hydraulic drive cylinder device 28 of the one billet loader 16a.
2 is lowered, and the billet holding portion 30 at the tip is opposed to the mounting table 26 of the billet carrier 20 as shown by a chain line in FIG.

At this time, the roller device 47 for clamping the billet 8 is retracted to the retreat limit so that the billet 8 can be introduced. When the billet 8 is sent from the billet carrier 20 holding the billet 8 in the standby state, the billet 8 rolls and the billet 8 is moved. The billet enters the billet holding portion 30 of the billet loader 16a, and at this time, the billet 8 is simultaneously transferred to the plurality of billet transport rollers 32R and 32L.
To adhere.

Then, No. (1) The clamping roller device 47 is tilted by the hydraulic drive cylinder 44 so that the billet 8
Clamp. Then, No. 1 billet loader 16
a), the billet 8 is transferred to the loading position, and then the clamp roller device 4 is rotated.
No. 7 is separated from the billet 8 while the stem 10 is moved forward. The billet 8 placed on the 1 billet loader 16a is designated as No. 1. N after transferring to 2 billet loader 16b
o. The one billet loader 16a is tilted and retracted.

Subsequently, when the stem 10 is advanced, the movements of the billet conveying roller 32 and the guide roller 58 are as follows. That is, fix the billet 8 diameter (D ₀₎ dummy Lee block 11 diameter (D ₁₎ has a D _1> D _0. During billet conveyance in such a state, the billet conveyance roller 32 constantly pushes up the bearing 36 in the direction of the billet 8 due to the tension of the spring 40, and as shown in FIG. α ₀ apart.
However, when the fix dammy block 11 that presses the billet 8 in the extrusion direction succeeds the billet 8 and passes over the billet conveying roller 32, the fix dammy block 11 overcomes the extension force of the spring 40 and FIG. As shown in ()), the billet conveying roller 32 is retracted. In other words, spacing between the bearing 36 and the pedestal 34 is alpha ₁ becomes, D _1>
Due to D _{0, the} billet conveying roller 32 moves backward by α ₀ −α ₁ minutes. After passing through the fix dam block 11, the spring 40 returns to the original state again by the extension force. The guide roller 58 of the billet guide roller device 52 operates in the same manner as the billet transport roller device 31.
Subsequently, the billet 8 is automatically adjusted by a billet guide roller device 52 disposed in the billet loading port 6 of the stem 10 so that the axis of the billet 8 and the axis of the billet loading port 6 are finally concentric. Cored. Further, the billet 8 is pushed into the billet loading port 6 by continuing to advance the stem 10 to complete the loading operation.

By the way, the billet 8 is connected to the container liner 5.
After the charging, the billet 8 for the next cycle is received by the billet loader 16a and partially raised to a position where it does not interfere with the container 1 during the extrusion of the previous cycle.

The billet 8 loaded in the billet loading port 6 is obtained as a desired extruded product from the die 12 by the advance of the stem 10.

[0030]

As is apparent from the above description, in the extrusion press insertion device according to the present invention, the billet holding portion of the billet loader, which holds the billet and can be freely inserted and removed between the container and the extrusion stem, is provided. Adjusting means provided radially from the outside of the billet; and a plurality of billet conveying rollers disposed above the adjusting means for conveying the billet in the axial direction of the container. A plurality of rows in the direction of the axis of the billet, and a billet guide roller capable of holding and transporting the billet concentrically with the axis of the container via an adjusting means at the entrance of the container on the billet insertion side, through the adjusting means, The billet loading diameter can be made closer to the diameter. Further, even when the inner diameter of the container is made closer to the billet diameter, the billet does not become clogged during the extrusion of the billet at the entrance or the inside of the billet loading port, and a stable billet loading (insertion) operation can be easily performed. Furthermore, the upset stroke can be shortened by reducing the dimensional difference between the billet outer diameter and the billet loading port, reducing the billet backflow during upset and reducing the entrapment of air and impurities remaining in the billet skin. And the occurrence of blisters is greatly reduced. The upset stroke is shortened, and idle time can be shortened.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a billet loaded state according to an embodiment of the present invention.

FIG. 2 is a configuration diagram in which a billet loader viewed from A to A in FIG. 1 is installed in an extrusion press.

FIG. 3 is a configuration diagram of a guide roller as viewed from BB in FIG. 1;

FIG. 4 is a main part front view showing a state in which a billet is supported by a guide roller.

FIG. 5 is a main part front view showing a state in which a billet is supported by a conveying roller and a clamping roller.

FIG. 6 is a main part side view showing vertical movement of a billet conveying roller when passing through a billet and a fixture damper block.

FIG. 7 is an explanatory diagram showing vertical movement of a billet conveying roller due to a diameter difference between a billet and a fixture damper block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Container holder 3 Heater 4 Insulation material 5 Liner 6 Billet loading opening 8 Billet 10 Stem 11 Fixing block 12 Dice 16 (16a, 16b) Billet loader 20 Billet carrier 22 Swing arm 28 Hydraulic drive cylinder device 30 Billet holding part 31 Billet conveying roller device 32 (32R, 32L) Billet conveying roller 34, 54 Pedestal 36, 56 Bearing 38, 60 Position adjusting bolt 40, 62 Spring 42 Guide liner 44 No. 1 Hydraulic drive cylinder 44a Cylinder main body 44b Rod 46 Lever 46a Support shaft 47 Clamping roller device 48 Clamping roller 50 Support plate 51 Holding plate 51a Through hole 52 Billet guide roller device 58 Guide roller

Claims (1)

(57) [Claims] An adjusting means provided in a billet holding portion of a billet loader, which holds a billet and is capable of entering and exiting between a container and an extruding stem, provided radially from outside the billet; A plurality of billet conveying rollers arranged on the adjusting means for conveying the billet in the axial direction of the container are provided in a plurality of rows in the axial direction of the billet, and the billet is placed at the entrance of the container on the billet insertion side. A billet insertion device for an extrusion press, wherein a billet guide roller that can be held and conveyed concentrically with the axis of the billet is provided via adjusting means.