JPH0788541A - Die changing device - Google Patents

Abstract

PURPOSE:To shorten die changing time by positioning a bolster pusher mounted on a die changing tray as a bolster is driven in unsymmetrical contact with a side face of a slide rail part. CONSTITUTION:At changing a die 24, after a die slide 22 is moved to the position of two dot chain line, the die 24 is changed to an another die 24. At die changing position, the die is loosely fitted in the die slide 22. At actuating a pusher cylinder 121, with slanting a slant link 126, a free roller 122 mounted on the tip part of the slant link 126 drives the die 24 in the counter pushing direction. The die 24 is fitted in the die slide 22 down to the normal depth. By this method, the positioning of the die 24 at die changing position becomes possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a die changing device in an extrusion press.

[0002]

2. Description of the Related Art When an extrusion press is used to perform an extrusion press, the die is brought into contact with the container while being pressed.
The billet on the billet loader is loaded into the container by the stem. Then, the stem is further advanced, and the billet is extruded from the die as an extruded product having a predetermined shape. This stem is normally strongly advanced by a hydraulic ram. After extruding the billet, the container is slightly retracted, the product part and the remaining billet in the container (referred to as discard) are separated by a cutting device, the discard is discharged, and then a new billet is discharged. To load. By the way, in recent years, the tendency of high-mix low-volume production of products has become stronger,
Frequent die changes may be used to press mold many types of products. Conventionally, when the die is exchanged after the extrusion of one cycle is completed and the extrusion of the next cycle is performed, the die is exchanged, and then the container is brought into contact with the die to load the billet.

The structure of such an extrusion press machine will be described below with reference to FIGS. 5 and 6. FIG. 5 is a cross-sectional view taken along the extrusion direction of the extrusion press device. Code 10
Is a machine base, the end platen 12 is fixed to one end side, the cylinder mounting block 14 is installed to the other end side, and the extrusion cylinder 16 is fixed to the cylinder mounting block 14. The lower end of the end platen 12 facing the extrusion cylinder 16 protrudes to form a guide rail support portion 18. The guide rail 20 is mounted on the guide rail support portion 18 in a horizontal direction orthogonal to the extrusion direction (hereinafter referred to as the extrusion direction). The horizontal direction, which is orthogonal to the 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 machine width direction, and the guide rail 20 and the ridges 20a and 22a provided on the die slide 22 are engaged with each other to form the die slide. It guides the movement of 22 in the machine width direction.
The die slide 22 is provided with a die mounting portion 22b having a U-shape when viewed from the extrusion silling 16 side, and the die 24 is mounted on the die slide 22 as it is dropped from above into the die mounting portion 22b. ing.

A mounting block 26 is fixedly provided on an upper portion of the end platen 12 facing the extrusion cylinder 16, and a cutting device 28 is provided on the mounting block 26. The cutting device 28 is for cutting the discard and the extruded product portion in the container 48, which will be described later, and includes a cutting blade 32 that is vertically stroked by a cylinder 30. Cylinder 30 is pillar 34
Is mounted on a cylinder mounting base 36 provided on the upper part of the piston rod 30a, and its piston rod 30a can be stroked downward. Piston rod 30a
A connecting block 38 is provided at the lower end of the connecting block 38, and the cutting blade 32 is attached to the lower end of a rod 40 fixed to the lower surface side of the connecting block 38.

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 2
2 is moved in the machine width direction by a cylinder (not shown) provided on the side of the end platen 12. Further, as shown in the drawing, 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 replacement position pulled out from the back surface of the end platen 12.

The end platen 12 and the cylinder mounting block 14 are connected by a column 44. A container guide 46 is externally fitted to the end platen 12 side portion of the column 44, and a container 48 is installed along the container guide 46 so as to be movable in the extrusion direction. A container moving cylinder 50 is provided on the surface of the end platen 12 opposite to the extruding cylinder 16 for moving the container 48 in the extruding 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 48. Therefore, the container 48 can be moved in the left-right direction in FIG. 5 by projecting and retracting the piston rod of the container moving cylinder 50. The container 48 has a billet loading hole 49, and the peripheral surface of the billet loading hole 49 is constituted by a container sleeve 49 a fitted in the container 48.

A billet loader 52 is provided on the extrusion cylinder 16 side of the container 48. Billet loader 5
2 has a billet mounting surface 52a on its upper surface. The lower end of the billet loader 52 is supported by a supporting member 54 and a rotating device 56, and the upper end of the billet loader 52 is tiltably installed in a direction perpendicular to the plane of FIG. The extrusion cylinder 16 has a ram 58,
A stem 60 is attached to the tip of the ram 58. In addition, the end platen 12 is provided on the front side in the direction perpendicular to the paper surface.
A support base is attached to the die slide 22, and the die slide 22 is moved in the direction perpendicular to the paper surface along the guide rail 20 and another guide rail (not shown) provided in the same row.

As shown in FIG. 7, a discard receiver 64 is connected to the die slide 22 by a hook (not shown) which can be easily released from the connection. A piston rod 66a of a cylinder 66 for moving the discard receiver 64 and the die slide 22 is connected to the discard receiver 64. The cylinder 66 is a bracket 66.
It is attached to the end platen 12 by A.

A support base 68 is mounted on the opposite side of the end platen 12 from the cylinder 66, and guide rails 70 and 72 are installed on the upper surface thereof. The upper surfaces of the guide rails 70 and 72 are installed so as to be at the same level as the upper surface of the guide rail 20.
When the piston rod 66a of 6 is projected, the die slide 22 is moved integrally with the discard receiver 64 on these guide rails 20, 70, 72. The guide rail 72 is installed on a die changer tray 74 that is movable in a direction parallel to the product extrusion direction (a direction perpendicular to the paper surface of FIG. 6). The die changer tray 74 is guided by guide rails 76 on both sides thereof. Is configured. A cylinder 78 is installed on the lower surface side of the die changer tray 74.
4 and the guide rail 72 on the upper side thereof are movable in the direction parallel to the product extrusion direction. Reference numeral 51 indicates a billet, 51a indicates a dummy block, and 50a indicates a container moving cylinder rod. Reference numeral 21 denotes a die back guide plate.

Further, as shown in FIG. 7, a push cylinder 13 is provided between the die replacement position and the billet 51 pushing position.
0 is provided, and the die 24 is pushed to a predetermined position of the die slide 22 so that the die 24 placed on the die slide 22 at the die exchange position can slide in the width direction of the machine.

[0011]

However, in the above-mentioned conventional replacement of the die 24, the die 24 is suspended along the die back guide plate 21 on the die slide 22 while the die 24 is suspended by using a crane or the like (not shown). If you place the die on the die slide 22, it will take considerable care to place the die 24 on the die slide 22 quickly, and the die 24 and the die slide 22 may be scratched by carelessness. Was. In order to solve such a problem, if the die slide 22 is made to have a size in the width direction more constant than the present size and the die 24 is easily put on the die slide 22, it is possible to contact the adjacent present device. Since a new problem that the die slide 22 itself cannot be slid in the width direction of the machine due to abutting, the movement of the die slide 22 is temporarily stopped in the middle of the extrusion position of the billet 51 after the die 24 is replaced, and the pusher cylinder Since the die 24 was moved to the center position of extrusion by using 130, there was a problem that extra time was required for die exchange.

[0012]

In order to solve such a problem, in the present invention, a die is mounted and a bolster which is reciprocated between the center of the press and its side position is provided with a die replacement standby position. In a die exchanging device that can be mounted in tandem on the die changer tray via the loose fit slide rail part, the bolster on the die changer tray is driven to one side of the side face of the loose fit slide rail part to drive the die. A bolster pusher for positioning with respect to the platen is attached to the die changer tray itself so that the drive of the pusher can be transmitted to the bolster via a link mechanism.

[0013]

[Operation] The die is placed on the die slide by the automatic loading device. Next, the bolster pusher having the parallel link mechanism is pressed in the anti-extrusion direction from the window formed on the rising wall surface of the bolster by being engaged with the die changer tray to press the die against the die changer tray. afterwards,
After operating the cylinder engaged with the die slide and moving the die slide in the machine width direction, after mounting the die on the pusher ring attached to the end platen,
It is used for extrusion molding using a stem.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of an extrusion press device according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view of the extrusion press machine, FIG. 2 is a front view seen from II-II of FIG. 1 before the die is pressed by the pusher machine, and FIG. 3 is a view when the die is pressed by the pusher machine. The front view and FIG. 4 are plan views of the die changer tray. In the following description, the same or corresponding parts as those in the conventional example of FIG. Further, in the present embodiment, the container 48, the billet loader 52, the stem 60, the extrusion cylinder (pressing device), etc. are not shown.

In this embodiment, the die slide 2 is used.
As shown in FIG. 1, a discard receiver 64 is connected to the hook 2 by a hook (not shown) that can be easily released from the connection. A piston rod of a cylinder 66 for moving the discard receiver 64 and the die slide 22 is connected to the discard receiver 64. The cylinder 66 is attached to the end platen 12 by a bracket 66A. A support base 68 is attached to the end platen 12 on the side opposite to the cylinder 66, and guide rails 70 and 72 are provided on the upper surface thereof. The upper surfaces of the guide rails 70 and 72 are installed so as to be at the same level as the upper surface of the guide rail 20. When the piston rod 66a of the cylinder 66 is projected, the die slide 2
2 is moved on these guide rails 20, 70, 72 integrally with the discard receiver 64.

The guide rail 72 is installed on a die changer tray 74 which is movable in a direction parallel to the product extruding direction (direction perpendicular to the paper surface of FIG. 1), and both sides of the die changer tray 74 are guide rails. It is configured to be guided by 76. A cylinder 78 is installed on the lower surface side of the die changer tray 74,
The die changer tray 74 and the upper guide rail 72 can be moved in a direction parallel to the product extrusion direction.

Next, the pusher device of the present invention will be described. The pusher device 120 includes a pusher cylinder 121,
Free roller 122, basic link 124, connecting link 1
25 and the tilting link 126.

The die back guide plate 21 is engraved in a gate shape, and the fixed brackets 123 are fixedly provided in the extrusion direction from both upper side wall surfaces of the die back guide plate 21. The support shaft 110a is pivotally supported in a direction orthogonal to the basic link 124. The pusher cylinder 121 is rotatably supported by the rear end of the pusher cylinder 121 and a support shaft 110b in the substantially central portion of the basic link 124, and the tip of the pusher cylinder rod 121a is horizontally mounted on a pair of tilt links 126 described later. It is fixed to the bar 21.

One end of a connecting link 125 is rotatably and movably supported by a support shaft 110c at the lower end of the basic link 124, and the other end is a tilting link 126.
L and the supporting shaft 110g, and a tilting link 126R and a supporting shaft 110d are rotatably and movably supported by the tilting link 126R and the supporting shaft 110d at substantially the center of the connecting link 125.
R and 126L are formed by a parallel link mechanism.
The tilt links 126R and 126L are each composed of a pair of bilaterally symmetrical links, and are supported by a bracket 128 fixed to a support base 68 so as to be rotatable but immovable to the support shaft 110.
It is pivotally supported by e and 110f. A free roller 122 is rotatably attached to the upper ends of the tilt links 126R and 126L. Reference numeral 23 indicates a pusher cylinder.

The operation method of the extrusion press device of this embodiment will be described below. In order to perform the extrusion, first, the billet 51 is placed on the billet mounting surface 52a of the billet loader 52.
And then the billet loader 52 is raised to a position where it can be extruded by the stem 60. Then, the extrusion cylinder 16 is operated to move the stem 60 forward, and the dummy block 51a
At the same time, the billet 51 is loaded into the billet loading hole 49 of the container 48. Then, the rotation device 56 is operated to move the billet loader 52 to the container 48 and the extrusion cylinder 16.
Withdraw from the position between and. The container 48 is moved in advance by the container moving cylinder 50 so as to come into close contact with the die 24.

After the charging of the billet 51 is completed in this way, the ram 58 is further advanced and the billet 51 is strongly pressed to be extruded from the die 24. During this extrusion, the die 24 is pressed against the end platen 12. After the extrusion of the billet 51 is completed, the container moving cylinder 50 is operated to move the container 48 so as to separate from the die 24. Then, the cylinder 30 of the cutting device 28 is operated and the cutting blade 32 is lowered to cut the product from the discard. Then, after cutting is completed, the cylinder 30 retracts the piston rod 30a,
The cutting blade 32 is retracted to the initial state.

After that, the cylinder 66 connected to the discard receiver 64 is actuated, and the piston rod 6
6a is advanced. After moving the discard receptacle 64 to a position where the receptacle 64b of the discard receptacle 64 coincides with the billet loading hole 49, the stem 60 is operated to drop the discard into the receptacle 64b. After that, the piston rod 66a of the cylinder 66 is further projected, and the die slide 22 is moved to the position of the chain double-dashed line 22A in FIG.
After carrying the die slide 22 outside like this,
The die 24 held by the die slide 22 is replaced with another die.

The die 24 is exchanged at the die exchange position. That is, when the die is loaded, the die 24 is loosely fitted to the die slide 22.
Pusher device 1 so that the machine can slide in the machine width direction
When pressure oil is introduced into the pusher cylinder 121 of No. 20, the pusher cylinder rod 121a extends and the tilting link 1
26 is tilted, and the free roller 122 attached to the tip of the tilting link 126 pushes the die 24 in the anti-extrusion direction. As a result, the die 24 is fitted into the die slide 22 to the regular depth. After the die 24 is fitted in the regular position, the pusher cylinder rod 121a retracts and returns to the initial state. The tilting link 126 is usually a die back guide plate 2.
Since 1 is retracted to the gate-shaped part, the tilting link 126 does not get in the way when the die 24 is inserted.

While exchanging the die and the plate, the following operation is performed. That is, the stem 60 from which the discard has been pushed out is retracted to the state shown in FIG. 1, and then the billet loader 52 is erected. And
After another billet is placed on the billet mounting surface 52a, the billet loader 52 is raised, and then the ram 58 is advanced to move the billet 51 into the billet loading hole 4 by the stem 60.
Load in 9. Next, the billet loader 52 is rotated in the falling direction to retract from the position between the container 48 and the extrusion cylinder 16. After the replaced die 24 is introduced to the extrusion position, then the container moving cylinder 50
Is operated to bring the container 48 into contact with the die 24. Then, the ram 58 is advanced and the billet is pushed by the stem 60 to perform extrusion molding. By repeating the above procedure, extrusion press molding can be performed one after another while exchanging the die and the plate.

[0026]

As is clear from the above description, in the present invention, the bolster which is reciprocated between the center of the press and the side position of the press is mounted at the die replacement standby position. In a die exchanging device which can be mounted in tandem on a die changer tray via a fitting slide rail, a bolster on the die changer tray is driven to one side of the side surface of the loose fitting slide rail to position the die with respect to a platen. Attaching the bolster pusher that forms the die to the die changer tray itself, and enabling the drive of this pusher to be transmitted to the bolster via a link mechanism, it becomes possible to perform the die positioning operation at the die exchange position, and shorten the die exchange time. This will improve the productivity of extruded products. Also, by incorporating the bolster pusher in the die changer tray, the size from the center of the press to the die changer tray is shortened, the accessibility to the press is improved and the press installation area is also reduced. Moreover, since the dies arranged in tandem are simultaneously positioned, it is not necessary to position the individual dies.

[Brief description of drawings]

FIG. 1 is a side view of an extrusion press device according to the present invention.

FIG. 2 is a front view of the pusher device seen from II-II in FIG. 1 before pressing a die.

FIG. 3 is a front view when a die is pressed by a pusher device.

FIG. 4 is a plan view of a die changer tray.

FIG. 5 is a cross-sectional view taken along the extrusion direction of a conventional extrusion press device.

FIG. 6 is a side view of the extrusion press device seen from VI-VI in FIG. 5.

FIG. 7 is an operation diagram of a die slide on which a die is placed.

[Explanation of symbols]

 12 End Platen 16 Extrusion Cylinder 22 Die Slide 23 Pusher Cylinder 24 Die 48 Container 60 Stem 74 Die Changer Tray 120 Pusher Device 122 Free Roller 124 Basic Link 125 Connection Link 126 Tilting Link

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[Procedure amendment]

[Submission date] September 27, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a side view of an extrusion press device according to the present invention.

FIG. 2 is a front view of the pusher device seen from II-II in FIG. 1 before pressing a die.

FIG. 3 is a front view when a die is pressed by a pusher device.

FIG. 4 is a plan view of a die changer tray.

FIG. 5 is a cross-sectional view taken along the extrusion direction of a conventional pressing press device.

FIG. 6 is a side view of the extrusion press device seen from VI-VI in FIG. 5.

FIG. 7 is an operation diagram of a die slide equipped with a die.

8 is an explanatory diagram showing a continuation of the operation shown in FIG. 7. FIG.

[Explanation of symbols] 12 end platen 16 extrusion cylinder 22 die slide 23 pusher cylinder 24 die 48 container 60 stem 74 die changer tray 120 pusher device 122 free roller 124 basic link 125 connecting link 126 tilting link

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Figure 4]

[Figure 7]

[Figure 8]

[Fig. 2]

[Figure 3]

[Figure 5]

[Figure 6]

Claims (1)

[Claims] 1. A bolster mounted with a die and reciprocating between a center of a press and a side position thereof is mounted in tandem on a die changer tray at a die exchange standby position via a loose fitting slide rail portion. In the possible die exchanging device, a bolster pusher for positioning the die relative to the platen by driving the bolster on the die changer tray against the side surface of the loose fitting slide rail part is attached to the die changer tray itself. A die exchanging device, wherein drive can be transmitted to the bolster through a link mechanism.