JPH03184616A - Dice lock device for extrusion press - 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 [Industrial Application Field] The present invention relates to a die locking device for an extrusion press used when tightening and detaching a large die having a product-shaped surface to an end platen.

[Prior Art] When extrusion pressing is performed using an extrusion press device, a container is brought into contact with a die in a pressed state, and a billet on a billet loader is loaded into the container by a stem. The stem is then further advanced and the billet is extruded from the die as an extruded product of a predetermined shape. This stem is normally strongly advanced by a hydraulic ram.

After pushing out the billet, move the container back slightly,
A cutting device separates the product from the remaining billet in the container (referred to as a day skirt), and after the day skirt is discharged, a new billet is loaded.

The configuration of such an extrusion press apparatus will be described below with reference to FIGS. 3, 4, and 5.

FIG. 3 is a sectional view taken along the extrusion direction of the extrusion press device.

Reference numeral 10 denotes a machine base, on which an end platen 12 is fixedly installed on one end side and a cylinder mounting block 14 on the other end side.
is installed, and an extrusion cylinder 16 is fixed to the cylinder mounting block 14.

The lower part of the end platen 12 on the side facing the extrusion cylinder 16 protrudes to form a guide rail support part 18, and a guide rail 20 is mounted on the guide rail support part 18 in a horizontal direction perpendicular to the extrusion direction (hereinafter referred to as this extrusion direction). (The horizontal direction perpendicular to the machine width direction is sometimes referred to as the machine width direction.)

A die slide 22 is installed on the guide rail 20 so as to be slidable in the width direction of the machine.
0 and the convex line 20a and concave line 2 provided on the die slide 22
2a to guide the movement of the die slide 22 in the machine width direction.

The die slide 22 is equipped with a die mounting portion 22b that is U-shaped when viewed from the extrusion cylinder 16 side, and the die 24 is mounted on the die slide 22 by being dropped into the die mounting portion 22b from above. ing.

A die skirt receiver (not shown) is connected to the die slide 22 so as to be adjacent in the machine width direction, and this die skirt receiver is also moved in the machine width direction along the guide rail 20 and the like.

A mounting block 26 is fixed to the upper portion of the end platen 12 on the side facing the extrusion cylinder 16, and a cutting device 28 is provided on the mounting block 26. The cutting device 28 is connected to a day skirt 6 in a container 48, which will be described later.
2 and the extruded product part, and includes a cutting blade 32 that is stroked in the vertical direction by a cylinder 30. The cylinder 30 is attached to a cylinder attachment base 36 provided at the top of the pillar 34, and its piston rod 30a can be stroked downward. A connecting block 38 is provided at the lower end of the piston rod 30a.
The cutting blade 32 is attached to the lower end of a rod 40 fixed to the lower surface side of the rod 8.

A key member 42 is fixed to the lower surface of the mounting block 26, and an engaging portion 22c formed on the upper surface of the die slide 22 is slidably engaged with the key member 42.

Both the key member 42 and the engaging portion 22c extend in the machine width direction.

The die slide 22 is moved in the machine width direction by a cylinder (not shown) provided on the side of the end platen 12. As shown in the figure, it is possible to reciprocate between the extrusion operation position located on the back surface of the end platen 12 (the surface on the extrusion cylinder 16 side) and the die exchange position where the die is removed from the back surface of the end platen 12. There is.

The end platen 12 and the cylinder mounting block 14 are connected by a column 44. A container guide 46 is fitted onto a portion of the column 44 on the end platen 12 side, and a container 48 is installed so as to be movable in the extrusion direction along the container guide 46.

A container moving cylinder 50 is provided on the opposite side of the end platen 12 from the extrusion cylinder 16 to move the container 48 in the extrusion direction. A piston rod (not shown) of the container moving cylinder 50 extends through the end platen 12, and its tip is connected to the container 4.
It is connected to 8. Therefore, by protruding and retracting the piston rod of the container moving cylinder 50, the container 48 can be moved in the left-right direction in FIG. 3. Note that the container 48 has a billet loading hole 4.
9, and the circumferential surface of the billet loading hole 49 is constituted by a container sleeve 49a fitted into the container 48.

A billet loader 52 is provided on the extrusion cylinder 16 side of the container 48 . The billet loader 52 has a billet mounting surface 52a on its upper surface. Further, the billet loader 52 has a support member 54 and a rotation device 56 on its lower end side.
The upper end side is installed so that it can freely tilt in a direction perpendicular to the plane of the paper of FIG. 3, as if swinging its head.

The extrusion cylinder 16 is equipped with a ram 58, and a stem 60 is attached to the tip of the ram 58.

To perform extrusion from the state shown in FIG. 3, first place the billet 51 and dummy block 51a on the billet mounting surface 52a of the billet loader 52, and then raise the billet loader 52 to a position where it can be extruded using the stem 60. let Then, the extrusion cylinder 16 is operated to advance the stem 60, and the billet 51 is loaded together with the dummy block 51a into the billet loading hole 49 of the container 48.Next, the rotation device 56 is operated to move the billet loader 52 into the container 48. It is evacuated from the position between it and the extrusion cylinder 16. Note that the container 48 has been moved in advance so as to come into close contact with the dice 24 by the container moving cylinder 50.

After loading the billet 51 in this way, the ram 58
is further advanced, and the billet 51 is strongly pressed and extruded from the die 24.

After extrusion of the billet 51 is completed, the container moving cylinder 50 is operated to move the container 48 away from the die 24.

Next, the cylinder 30 of the cutting device 28 is operated and the cutting blade 32 is lowered to cut the product 63 and the day skirt 62, and the day skirt 62 falls downward. After the cutting is completed, the cylinder 30 retracts the piston rod 30a and retracts the cutting blade 32 to the standby state shown in FIG. 5.

Here, in order to prevent the upper surface of the die 24 from tilting forward due to the downward force caused by shearing force when cutting the day skirt 62 with the cutting blade 32, a guide clamp 61 as shown in FIG. 5 is provided. ing.

To replace the die 24 and perform the next extrusion press, the die slide 24 is moved onto the support stand on the front side in the direction perpendicular to the plane of the paper, and is removed from the position behind the end platen 12.

Then, from the die slide 22 to the die 24
Remove it and attach another die in its place. Thereafter, the die slide 22 is moved to the back side in the direction perpendicular to the plane of the paper and returned to the extrusion position shown in FIG.

[Problem to be Solved by the Invention J] In such an extrusion press, after extrusion of the billet is completed, the cylinder for moving the container is operated to move the container away from the die, and then the cylinder of the cutting device is operated to cut the billet. When an attempt is made to cut the product and the day skirt by lowering the blade, a downward force due to cutting resistance (an attempt to push down the front end of the die and lift the rear end of the die) is generated at the interface between the product and the day skirt. force) acts. Along with this, the lower surface of the die slide, which has a U-shaped front face and moves in the width direction of the machine on the guide rail, is fitted in an uneven shape so as not to deviate from the upper surface of the guide rail when sliding. However, since the upper surface of the die slide does not allow the die to be mounted on the U-shaped bottom area and is not rigidly held so that it cannot be tilted forward, it is different from the day skirt described above. Due to the downward force of the cutting force with the product, the die placed on the die slide tilts as if the rear end of the die is lifted, and the upper end of the die slide also tends to tilt toward the container side. . Therefore, due to the tilting of the die body, the product itself near the die may be bent into a convex shape, or the product itself may be bent into a convex shape, or the product itself may be bent into a convex shape.
Unfortunately, the outside of the loaded product was scratched at the corner of the die extrusion outlet, and furthermore, the cutting device was not able to completely separate the day skirt from the product, resulting in a portion of the day skirt being damaged. If the container remains on the end face of the die and the container is strongly pressed against the die in this state, there is a problem in that flakes are likely to occur during extrusion in the next cycle.

[Means for Solving the Problems] In order to solve these problems, the present invention provides an extrusion press apparatus in which a die is held by a die slide that is movable along the side surface of the end platen where the die is disposed. A locking block is provided that engages with the upper end of the die slide, and a guide rail is provided that engages with the lower end of the die slide, and the locking block and the guide rail each have a through hole provided in the end platen. The locking cylinder is engaged with the locking rod through the locking rod inserted through the hole. In the extrusion press device of the present invention, after the billet is extruded by the stem, when the product remaining in the die and the day skirt are separated by the cutting blade of the cutting device,
To prevent the die from tilting due to cutting force,
The die slide on which the die is mounted is locked by the locking device to the end platen side so that the upper and lower ends of the die slide cannot be tilted forward, thereby pressing the die against the pressing surface and locking the die so that it cannot be moved. Therefore, the product and day skirt can be completely separated at the desired position. In this way, by locking the dice, the dice assembly (referred to as dice in the text, this dice can be divided into three sections. That is,
It is possible to eliminate gaps in the polster, dummy polster, and gilling holding the die from the pressure ring side, and the gap between the cutting surface of the die and the cutting surface of the cutting blade 32 becomes constant, and the sharpness of the day skirt 62 is improved.

In addition, when replacing the die, first drain the hydraulic oil from the lock cylinder, then the die slide on which the die is placed will be unlocked, and the die will also be unlocked. It is possible to move it in the width direction of the machine while leaving it in place.

[Example] Examples will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view along the extrusion direction of the vicinity of the end platen of an extrusion press apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line ■--■ in FIG. 1.

In this embodiment, the die slide 22 includes a second
As shown in the figure, the day skirt receiver 64 is connected by a hook 64c that can be easily disconnected. A piston rod 66a of a cylinder 66 for moving the die skirt receiver 64 and the die slide 22 is connected to the die skirt receiver 64. Note that the cylinder 66 is attached to the end platen 12 by a bracket 66A.

A support stand 68 is attached to the opposite side of the end platen 12 from the cylinder 66, and guide rails 70, 72 are installed on the upper surface of the support stand 68. These guide rails 70
, 72 are installed so that their upper surfaces are on the same level as the upper surface of the guide rail 20, and when the piston rod 66a of the cylinder 66 is protruded, the die slide 22 is integrated with the die skirt receiver 64, and these guide rails 2
Moved on 0.70.72. In addition, guide rail 7
2 is installed on a base 74 that is movable in a direction parallel to the product extrusion direction (perpendicular to the plane of the paper in FIG. 2), and the base 74 is configured to be guided by guide rails 76 on both sides. There is. A cylinder 78 is installed on the lower surface side of the base 74, and allows the base 74 and the guide rail 72 above it to move in a direction parallel to the product extrusion direction.

As mainly shown in FIG. 1, a pressure ring 101 is installed immovably between the die slide 22 and the end platen 12.

Furthermore, a guide rail 20 is provided on the support portion 18 that is integral with the end platen 12.

The upper surface of the guide rail 20 has a convex strip shape 20a, and the lower surface has a concave strip shape 22a so as to engage with this guide rail 20.
2 and mounted in the extrusion position. Here, the locking device of the present invention will be described.

The locking device 100 includes a locking block 120, a locking rod 116a, and a locking cylinder 114.

Now, as shown in FIG. 1, cylinders 114 for fixing the die 24 when the die 24 is in the extrusion position are mounted vertically and spaced apart on the side surface of the end platen 12.

The locking rod 116a of the locking cylinder 114 is
It is inserted into a through hole 118 of the end platen 12, and its tip is connected to a locking flock 120 having a single-shape. In addition, a thread for attaching a port 115a is engraved at the tip of the rowing rod 116a, and after the locking block 120 is inserted, the bolt 115 is screwed and tightened, and the bolt 115a is tightened. 115 and locking block 12 using several separate screws on the head of 115.
0 is fixed.

An upper gib 26 and a lower gib 27 are disposed at the leading ends of the upper and lower locking rods 116a, respectively. The inside of the upper gib 26 and the lower gib 27 have a hole diameter that is slightly larger than the outer diameter of the pole 115 fastened to the locking rod 116a, and the hole diameter of the locking rod 116a when the upper gib 26 and the lower gib 27 are attached. An extra hole with a length equal to the difference between the forward limit and the backward limit is cut.

Further, the rear end of the locking rod 116a is fixed to a piston engaged with the locking cylinder 114, so that the die 24 placed on the die slide 22 is cut when the day skirt 62 is cut by the cutting device 28. Pressure oil is introduced into the piston rod side of the lock cylinder 114 to prevent it from tilting.

When the locking block 120 is moved to the left in FIG. 1, the die 24 moves in the product extrusion direction and is strongly pressed against the pressure ring 101.

On the other hand, as described above, the die 24 is moved to the die slide 22.
After placing the billet on the top and extruding the billet, move the die slide 22 in the width direction of the machine and press the die 24.
When you want to release the position from the normal mounting state on the pressure ring 101, by supplying pressure oil to the piston head side of the locking cylinder 114, the die 24 placed on the die slide 22 is pressed against the pressure ring 101. The structure is such that the locked state is released.

The operation of the extrusion press device configured as above will be explained.

When it becomes necessary to replace the die slide 22 together with the die 24 or to replace only the die 24, the rolling device 100 is activated.

First, when pressure oil is supplied to the piston head side of the locking cylinder 114 of the locking device lOO, the locking block 120 moves forward via the locking rod 116a.
The engagement state with the die slide 22 that is pressed toward the first side is released.

Next, when pressure oil is supplied to the piston head side of the cylinder 66, the die 24 placed on the die slide 22 also moves.
The die 24 moves forward from the position shown in FIG. 2 to the die exchange position, and the next die 24 or die slide 22 is also exchanged.

In this way, after replacing the die 24, when moving the die 24 to the press center by supplying pressure oil to the piston rod side of the cylinder 66, first supply pressure oil to the piston head side of the locking cylinder 114 of the locking device lOO. introduced,
The locking block 120 is set at the forward limit, and when the die 24 placed on the die slide 22 moves to the center of the press, the piston head side of the locking cylinder 114 is released and pressure oil is introduced into the piston rod side. Then, the die 24 is locked between the pressure rings 101 by retracting the locking block 120.

Next, in order to perform extrusion from this state, first the billet 51 is placed on the billet mounting surface 52a of the billet loader 52, and the dummy block 51a is attached to the pressing side of the billet 51. The extrusion cylinder 16 is actuated to advance the stem 60 and the billet 51 is loaded into the billet loading hole 49 of the container 48. Next, the rotating device 5
6 is activated to retract the billet loader 52 from the position between the container 48 and the extrusion cylinder 16. Note that the container 48 has been moved in advance so as to come into close contact with the dice 24 by the container moving cylinder 50.

After loading the billet 51 in this way, the ram 58
further advance and press the billet strongly to release die 2.
During this extrusion, the die 24 is pressed against the end platen 12 via the plate 114.

After extrusion of the billet is completed, the container moving cylinder 50 is operated to move the container 48 away from the die 24.Next, the cylinder 30 of the cutting device 28 is operated and the cutting blade 32 is lowered. When the product and day skirt are cut, the day skirt falls downward. After the cutting is completed, the cylinder 30 retracts the piston rod 30a and retracts the cutting blade 32 to the initial state shown in FIG. After that, cylinder 6
The piston rod 66a of No. 6 is protruded, and the die slide 2
2 to a position on the base 74 shown by the two-dot chain line 22A in FIG. The die 24 held on the die slide 22 in this way is replaced with another die.

Note that in the present invention, two sets of locking devices 100 are disposed at the upper and lower portions of the die slide 22, respectively.
You may increase the number of

[Effects of the Invention] As described above, according to the extrusion press device of the present invention, the die and the die slide are held firmly in contact with the pressure ring by the die clamp and the rolling device, respectively. The die slide and the die itself will not tilt toward the container side when the day skirt attached to the product is cut off, and therefore the product will not be damaged at the corner of the die extrusion port. In this way, by locking the dice, the dice assembly (referred to as dice in the text, and this dice can be divided into three sections. In other words, from the pressure ring side, the polster, the dummy polster, and the die ring holding the dice) This makes it possible to eliminate the gap between the die cut surface and the cut surface of the cutting blade 32, making the gap between the cutting surface of the die and the cutting surface of the cutting blade 32 constant, improving the sharpness of the day skirt 62. Furthermore, since the product and day skirt are completely separated, it helps prevent flaking and improves the operating rate of the extrusion press equipment.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view along the extrusion direction near the end platen of an extrusion press device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a conventional A cross-sectional view showing an example, FIG. 4 is a vertical cross-sectional view along the extrusion direction near the end platen of a conventional extrusion press device, and FIG.
A sectional view taken along the line V-V in the figure is shown, respectively. 10... Machine base, 12... End platen, 16... Extrusion cylinder, 20... Guide rail, 22... Die slide, 24...Dice, 26...Upper give, 27...Lower give, 28...
- Cutting device, 30...Cylinder, 32...
...cutting blade. 48... Container, 51... Billet, 100... Locking device. 114...Lock cylinder, 116a...
Locking rod, 120... Locking block.

Claims (1)

[Claims] An extrusion press device in which a die is held by a die slide movable along the die arrangement side of an end platen, comprising: a locking block that engages with the upper end of the die slide; , a guide rail is provided that engages with the lower end of the die slide, and the locking block and guide rail are respectively locked through locking rods that are inserted through through holes provided in the end platen. A die locking device for an extrusion press, characterized in that it is provided with a device for locking the die, which is engaged with a cylinder.