JP2020157369A - Shear device for extrusion press device - Google Patents

Abstract

To provide a shear device for an extrusion press device which can avoid that a shear blade contacts a cut surface of an extrusion product exposed to a die end face when lifting the shear blade.SOLUTION: A shear device 10 for an extrusion press device comprises a knocker mechanism 31 for removing a discard 51 from a shear blade 51, in which a shear slide 13 comprises: a slide tilting part 131 comprising a storage part 131a in which a knocker 33 is stored; a slide body part 132 which so supports the slide tilting part 131 as to be capable of tilting to a side apart from a die 23; and an elastic body 133 which tilts the slide tilting part 131 to a side apart from the die 23. Switching is performed between a discard cutting posture for maintaining a shear blade 11 at a discard cutting position in the storage state of the knocker 33 into the storage part 131a, and a shear blade retraction posture for separating the shear blade from a die 23 end face in a retraction state of the knocker 33 from the storage part 131a.SELECTED DRAWING: Figure 6

Description

In the present invention, in an extrusion press device for extrusion molding of metals such as aluminum alloys, the container is separated from the die after extrusion molding, and a discard that is the rest of the billet on the end face of the die and is continuous with the extruded product in the die is formed. It relates to a shear device of an extrusion press device for cutting.

The basic configuration of the shear device of the extrusion press device will be described. A shear guide is arranged on a fixed frame erected on the container side above the end platen where the dice are held, and a shear slide with a shear blade arranged at the lower end is guided to the shear guide so as to be able to move up and down. .. The chassis slide is driven up and down by the shear cylinder, and the shear cylinder is attached to the fixed frame in the same manner as the shear guide. In such a shear device, when cutting the discard, the shear slide is lowered from the upper standby position, and the shear blade cuts the discard from the extruded product at the end face of the die. At this time, since the cut discard is attached to the shear blade, the knocker of the knocker mechanism built in the shear slide is lowered to remove the adhered discard.

As a shear device for removing a discard (push) adhering to a shear blade (shear knife) by a knocker mechanism (knocker) as described above, for example, a pusher cutting device (shear device) of Patent Document 1 can be mentioned. be able to.

JP-A-2002-102920

The process of cutting the discard by the conventional shear device will be described with reference to FIGS. 2 and 3. In FIGS. 2 and 3, the same components as those in the first embodiment of the present application described later are designated by the same reference numerals. Further, in the conventional shear device, in FIG. 1 showing the shear device 10 according to the first embodiment of the present application, the shear slide 13 is not two members of the slide tilting portion 131 and the slide main body portion 132, but is integrally formed. The overall view is omitted because it is in the form of 2A and 2B are explanatory views (side views) of the discard remaining on the end face of the die after the completion of extrusion molding. FIG. 2A is a view at the time of completion of extrusion molding, and FIG. The state where the container holder is separated from the die for the process is shown. 3A and 3B are explanatory views (side views) of a discard cutting process by a conventional shear device, FIG. 3A is a shear blade lowering, FIG. 3B is a discard removing by knocker lowering, and FIG. c) indicates the shear blade rise. In addition, in FIGS. 2 and 3, in order to make the figure easier to see, the illustration of the end platen 21 on which the die 23 is held (the left side of the die 23 in FIGS. 2 and 3) is omitted.

At the time of extrusion molding, the container holder 22 (container) is pressed against the die 23 by a container cylinder or the like (not shown), and the billet (extruded material) in the container holder 22 is pressed against the die 23 by the extrusion stem 20. The extruded product 50 is continuously extruded. Then, when the extrusion molding is completed, as shown in FIG. 2A, the discard 51 which is the rest of the billet in the container holder 22 and on the end face of the die 23 and is continuous with the extrusion product 50 in the die 23. Is left.

Next, as shown in FIG. 2B, the container holder 22 together with the extrusion stem 20 is prepared for the next extrusion molding cycle, such as supplying a new billet from the state shown in FIG. 2A to the container. Is separated from the die 23 to expose the discard 51.

In the shear device of the conventional extrusion press device, the shear blade 11 is lowered to cut the discard 51 from the extrusion product 50 (not shown) at the end face of the die 23 (FIG. 3 (a)). The position of the shear blade 11 when cutting the discard is generally a position separated from the end face of the die 23 by a predetermined gap (1 mm or less). This is to protect the shear blade 11 and the end face of the die 23. At this time, as described above, since the cut discard 51 adheres to the shear blade 11, the knocker 33 of the knocker mechanism 31 (not shown) built in the shear slide 13 is lowered and adhered. Remove the discard 51. Further, in order to cut the discard 51 at a position where the shear blade 11 is separated from the end face of the die 23 by a predetermined gap, a thin film 51'which is a part of the discard 51 and is continuous with the extruded product is formed on the end face of the die 23. It is left (Fig. 3 (b)). In order to make the figure easier to see, the thickness of the thin film 51'in FIG. 3 is exaggerated.

Here, in the shear device of the conventional extrusion press device including the presser foot cutting device of Patent Document 1, the shear blade 11 is raised to the standby position in preparation for the next extrusion molding cycle (FIG. 3 (c)). ), There is a problem that the shear blade 11 comes into contact with the cut surface (shirring surface SF) of the thin film 51'exposed on the end surface of the die 23 and damages the cut surface.

In the next extrusion cycle, a new billet is supplied into the container and upset with the thin film 51'left on the end face of the die 23. The upset is a preparatory step of the extrusion molding cycle, in which the supplied billet is pressed against the die 23 by the extrusion stem, the billet is plastically deformed, and the outer peripheral surface is brought into contact with the inner peripheral surface of the container. The extrusion cycle is started after this upset. Here, when the cut surface of the thin film 51'is damaged, the air in the damaged portion (recess) of the thin film 51'is not discharged to the outside of the wound at the time of upset, and the scratched portion of the thin film 51'and the billet die 23. It will be left behind between the side surface. At the time of extrusion molding, the leftover air is caught in the metal flow (extruded material flow) from the billet to the extruded product via the die 23 and mixed into the extruded product, or on the surface of the extruded product. There is a concern that the extruded product may be exposed and adversely affect the strength of the extruded product or the surface accuracy.

The present invention has been made in view of the above-mentioned problems, and when the shear blade is raised to the standby position, it is possible to prevent the shear blade from coming into contact with the cut surface of the extruded product exposed on the end face of the die. It is an object of the present invention to provide a shear device for a press device.

The above object of the present invention is to use a fixed frame erected above the end platen.
With the shear guide arranged on the fixed frame,
A shear slide that is guided up and down by the shear guide and has a shear blade arranged at the lower end,
A knocker mechanism built in the shear slide and removing the discard attached to the shear blade from the shear blade by lowering the knocker.
With
The shear slide
A slide tilting portion provided with a storage portion in which the shear blade is arranged and the knocker is stored,
A slide body portion that supports the slide tilting portion so as to tilt toward a side away from the die,
An elastic body that is arranged between the slide tilting portion and the slide main body portion and exerts an elastic force that tilts the slide tilting portion to a side away from the die.
With
A discard cutting posture in which the shear blade is maintained at the discard cutting position in a state in which the knocker is stored in the storage portion of the slide tilting portion.
By a shear device of an extrusion press device, the knocker switches between a shear blade retracting posture in which the shear blade is separated from the die end face in a state where the slide tilting portion is retracted from the storage portion. Achieved.

Further, in the shear device of the extrusion press device according to the present invention, the knocker mechanism includes the knocker, an actuator for raising and lowering the knocker, and an actuator.
With
A locking portion having a cross section orthogonal to the elevating direction of the knocker larger than that above the knocker is formed below the knocker.
In the state where the knocker is stored in the storage portion of the slide tilting portion, the pressure receiving portion that exerts a force for raising the knocker of the actuator on the slide tilting portion via the locking portion. It is preferable that it is formed in the accommodating portion of the slide tilting portion.

The shear device of the extrusion press device according to the present invention includes a fixed frame erected above the end platen and a fixed frame.
With the shear guide arranged on the fixed frame,
A shear slide that is guided up and down by the shear guide and has a shear blade arranged at the lower end,
A knocker mechanism built in the shear slide and removing the discard attached to the shear blade from the shear blade by lowering the knocker.
With
The shear slide
A slide tilting portion provided with a storage portion in which the shear blade is arranged and the knocker is stored,
A slide body portion that supports the slide tilting portion so as to tilt toward a side away from the die,
An elastic body that is arranged between the slide tilting portion and the slide main body portion and exerts an elastic force that tilts the slide tilting portion to a side away from the die.
With
A discard cutting posture in which the shear blade is maintained at the discard cutting position in a state in which the knocker is stored in the storage portion of the slide tilting portion.
When the shear blade is raised to the standby position in order to switch between the shear blade retracting posture in which the shear blade is separated from the die end face in the retracted state of the slide tilting portion from the storage portion of the knocker, the shear blade is sheared. It is possible to prevent the blade from coming into contact with the cut surface of the extruded product exposed on the end face of the die.

It is a schematic cross-sectional side view which shows the shear device which concerns on 1st Embodiment, and a part of the extrusion press device near the shear device. It is explanatory drawing (side view) of the discard which remains on the end face of a die after completion of extrusion molding. It is explanatory drawing (side view) of the discard cutting process by a conventional shear device. It is explanatory drawing of the discard cutting posture which concerns on 1st Embodiment. It is explanatory drawing of the shear blade retracting posture which concerns on 1st Embodiment. It is explanatory drawing (side view) of the discard cutting process by the shear device which concerns on 1st Embodiment.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

[First Embodiment]
The shear device 10 according to the first embodiment will be described with reference to FIGS. 1 and 4 to 6. FIG. 1 is a schematic cross-sectional side view showing a part of the shear device according to the first embodiment and the extrusion press device in the vicinity of the shear device. 4A and 4B are explanatory views of a discard cutting posture according to the first embodiment, FIG. 4A is a view taken along the arrow A of FIG. 1, and FIG. 4B is an arrow B of FIG. 4A. It is a visual view. 5A and 5B are explanatory views of the shear blade retracting posture according to the first embodiment, FIG. 5A is a view taken along the arrow A of FIG. 1, and FIG. 5B is an arrow C of FIG. 5A. It is a visual view. 6A and 6B are explanatory views (side views) of a discard cutting process by the shear device according to the first embodiment, FIG. 6A is a shear blade lowering, and FIG. 6B is a knocker lowering to remove the discarder. , FIG. 6 (c) shows the shear blade rising.

As shown in FIG. 1, a shear guide 14 is arranged on a fixed frame 15 erected on the container holder 22 side above the end platen 21 on which the die 23 is held, and a shear blade 11 is arranged at the lower end. The shear slide 13 is guided to the shear guide 14 so as to be able to move up and down. The chassis slide 13 is driven up and down by the shear cylinder 16, and the shear cylinder 16 is attached to the fixed frame 15 in the same manner as the shear guide 14. Note that FIG. 1 shows a state in which the shear slide 13 (shear blade 11) is in the upper standby position.

In such a shear device 10, when cutting the discard, the shear slide 13 is lowered from the upper standby position, and the discard 51 is cut from the extruded product (not shown) by the shear blade 11 at the end face of the die 23. As described above, the position of the shear blade 11 at the time of cutting the discard is a position separated from the end face of the die 23 by a predetermined gap. At this time, since the cut discard 51 adheres to the shear blade 11, the knocker 33 (see FIG. 6B) of the knocker mechanism 31 (not shown) built in the shear slide 13 is lowered and adhered. Remove the discard 51. Further, in the shear device 10, the cylinder rod 16a of the shear cylinder 16 is connected to the central portion of the upper end of the shear slide 13 via the clevis 43 and the clevis pin 42. These configurations are the main configurations of the shear device 10. As described above, a thin film 51'continuous with the extruded product is left on the end face of the die 23. Then, in FIG. 6, the thickness of the thin film 51'is shown exaggeratedly.

Next, the extrusion press device in the vicinity of the shear device 10 will be described. A pressure ring 26 is embedded in the holding surface of the die 23 of the end platen 21 and receives a pressing force acting on the die 23 during extrusion molding. Further, the container holder 22 is composed of known parts such as a container liner and a container main body, and is arranged so as to be close to and separated from the die 23 by a container cylinder (not shown).

The die 23 composed of a plurality of known parts is placed on the die slide 25, formed in a horseshoe shape, and is fixed to the container holder 22 side of the die slide 25 by the hose shoe 28 on the container holder 22 side. Movement to is restricted. Further, the die slide 25 on which the die 23 is placed is guided by the guide member 27 and is configured to be movable in a horizontal direction perpendicular to the extrusion direction of the extrusion press device. The guide member 27 is supported by a support member 24 fixed to the holding surface of the die 23 of the end platen 21.

Subsequently, the details of the shear device 10 according to the first embodiment will be described with reference to FIGS. 4 and 5. The shear slide 13 is a slide that supports a slide tilting portion 131 having a storage portion 131a in which a shear blade 11 is arranged and a knocker 33 is housed, and a slide tilting portion 131 that can be tilted to a side separated from the die 23. An elastic body 133 that is arranged between the main body portion 132 and the slide tilting portion 131 and the slide main body portion 132 and exerts an elastic force that tilts the slide tilting portion 131 to a side away from the die 23. ing. Then, in the state where the knocker 33 is stored in the storage portion 131a of the slide tilting portion 131, the discard cutting posture (see FIG. 4) for maintaining the shear blade 11 at the discard cutting position and the slide tilting of the knocker 33. The shear blade retracting posture (see FIG. 5) that separates the shear blade from the end face of the die 23 can be switched when the portion 131 is retracted from the storage portion 131a.

Specifically, as shown in FIGS. 4 and 5, the slide tilting portion 131 is moved by the tilting shaft 134 arranged on the container holder 22 side of each of the slide tilting portion 131 and the slide main body portion 132. The portion 132 is supported so as to be tiltable only in a direction away from the die 23. Then, two elastic bodies 133 are arranged between the slide tilting portion 131 and the slide main body portion 132. The elastic body 133 is composed of a compression coil spring or the like, and is arranged in a compressed state in which a predetermined elastic force is generated in an opposed recess or the like formed between the slide tilting portion 131 and the slide main body portion 132. These two elastic bodies 133 slide due to the elastic force of the elastic body 133 in a state where no external force acts on the slide tilting portion 131, that is, in a state where the knocker 33 exits the storage portion 131a of the slide tilting portion 131. The tilting portion 131 is tilted to the side away from the die 23, and as shown in FIGS. 6 (b) and 6 (c), the shear blade 11 is placed on the cut surface (shirring surface SF) of the thin film 51'or as shown in FIGS. As shown in FIG. 5B, the shear blade 11 can be separated (tilted) by a clearance d from the position of the shear blade 11 in the discard cutting posture shown by the two-point chain line (shear blade retracting posture).

On the other hand, in a state where an external force is applied to the slide tilting portion 131, that is, in a state where the knocker 33 is stored in the storage portion 131a of the slide tilting portion 131, the slide tilting portion resists the elastic force of the elastic body 133. A state in which the shear blade 11 is separated from the end surface of the die 23 by a predetermined gap (discard cutting) as shown in FIGS. 4 (b) and 6 (a) to prevent the 131 from tilting to the side away from the die 23. The shear blade 11 can be lowered while maintaining the posture).

Here, the knocker mechanism 31 will be described with reference to FIGS. 4 to 6. The knocker mechanism 31 includes a knocker 33 and an actuator (not shown) for raising and lowering the knocker 33. The actuator is built in the slide main body 132. As shown in FIG. 6B, if the discard 51 adhering to the shear blade 11 can be removed by lowering the knocker 33, a pneumatic / hydraulic cylinder or a known actuator is appropriately adopted as the actuator. The illustration of the actuator is omitted because it is sufficient. Further, the reference numeral 31 of the knocker mechanism 31 is displayed in parentheses on the knocker 33, which is a typical configuration of the mechanism.

Further, the shape of the knocker 33 and the storage portion 131a of the slide tilting portion 131 in which the knocker 33 is stored are stored in the storage portion 131a of the slide tilting portion 131 of the knocker 33 as described above. In order to prevent the slide tilting portion 131 from tilting toward the side away from the die 23 against the elastic force of the elastic body 133, it is preferably formed in a predetermined shape.

That is, a locking portion 33a having a cross-sectional area orthogonal to the elevating direction of the knocker 33 larger than that above is formed below the knocker 33, and the actuator is stored in the storage portion 131a of the slide tilting portion 131 of the knocker 33. A pressure receiving portion 131b that exerts a force for raising the knocker 33 (not shown) on the slide tilting portion 131 via the locking portion 33a is formed in the accommodating portion 131a of the slide tilting portion 131.

In the first embodiment, as shown in FIGS. 4A and 5A, the locking portion 33a below the knocker 33 is above the knocker 33 in the same direction as the axial direction of the tilting shaft 134. It is formed so that the cross section is larger than that of the above. With this configuration, when the knocker 33 is raised by an actuator (not shown), the locking portion 33a of the knocker 33 becomes the shape of the locking portion 33a formed in the accommodating portion 131a of the slide tilting portion 131. Since it comes into contact with the pressure receiving portion 131b and pushes up the slide tilting portion 131, it is possible to prevent the slide tilting portion 131 from tilting to the side away from the die 23 against the elastic force of the elastic body 133. it can. The shapes of the locking portion 33a and the pressure receiving portion 131a are not limited to the shapes described in the first embodiment. A suitable shape may be appropriately adopted in accordance with the restrictions of the shear device 10 and the extrusion press device.

On the other hand, the cross-sectional area orthogonal to the elevating direction of the knocker 33 other than the locking portion 33a of the knocker 33 is the pressure receiving portion 131b formed in the accommodating portion 131a of the slide tilting portion 131 and the other accommodating portion 131a. It is sufficiently smaller than the cross section. Therefore, the knocker 33 is stored in the storage portion 131a of the slide tilting portion 131 (discard cutting posture), and the knocker 33 is retracted from the storage portion 131a of the slide tilting portion 131 (shear blade retracting posture). Even when the slide tilting portion 131 is tilted and the storage portion 131a is tilted with respect to the knocker 33 when the knocker 33 is raised or lowered when switching from one state to the other state, the knocker 33 The portion other than the locking portion 33a does not come into contact with the inner surface of the storage portion 131a of the slide tilting portion 131, and does not interfere with the raising and lowering operation of the knocker 33.

As described above, in the shear device 10 of the extrusion press device according to the first embodiment, the shear blade 11 is lowered, and at least while the discard 51 is being cut by the shear blade 11, the shear blade The discard cutting posture of the shear blade 11, and the shear blade retracting posture of the shear blade 11 while the shear blade 11 is raised and at least the shear blade 11 passes through the cutting surface of the extruded product exposed on the end face of the die 23. Can be maintained and switched by raising and lowering the knocker 33 of the knocker mechanism 31 without the need for a dedicated drive source.

Although the first embodiment has been described above with respect to the embodiment for carrying out the invention, the present invention is not limited to the above-described embodiment and does not deviate from the contents described in the claims. , Can be implemented in various ways.

For example, in the first embodiment, it has been explained that the shear blade 11 is arranged on the slide tilting portion 131. It goes without saying that the shear blade 11 is not integrally formed with the slide tilting portion 131 because maintenance and replacement are required, and only the shear blade 11 is detachable. Further, in the arrangement (mounting) of the shear blade 11 on the slide tilt portion 131, the shear blade 11 is attached to the slide tilt portion 131 in the vertical or horizontal direction, and further, the shear blade 11 in the discard cutting posture. It is preferable that the mounting angle of the is adjustable.

10 shear device, 11 shear blade, 13 shear slide, 14 shear guide, 15 fixed frame, 16 shear cylinder, 16a cylinder rod, 21 end platen, 23 die, 31 knocker mechanism, 33 knocker, 33a locking part, 42 clevis pin, 43 clevis, 50 extruded product, 51 discard, 131 slide tilting part, 131a storage part, 131b pressure receiving part, 132 slide body part, 133 elastic body, 134 tilting shaft, d clearance, SF shirring surface

Claims (2)

A shear device for an extrusion press that cuts a discard on the end face of a die after extrusion molding.
With a fixed frame erected above the end platen,
With the shear guide arranged on the fixed frame,
A shear slide that is guided up and down by the shear guide and has a shear blade arranged at the lower end,
A knocker mechanism built in the shear slide and removing the discard attached to the shear blade from the shear blade by lowering the knocker.
With
The shear slide
A slide tilting portion provided with a storage portion in which the shear blade is arranged and the knocker is stored,
A slide body portion that supports the slide tilting portion so as to tilt toward a side away from the die,
An elastic body that is arranged between the slide tilting portion and the slide main body portion and exerts an elastic force that tilts the slide tilting portion to a side away from the die.
With
A discard cutting posture in which the shear blade is maintained at the discard cutting position in a state in which the knocker is stored in the storage portion of the slide tilting portion.
A shear device for an extrusion press device, which switches between a shear blade retracting posture in which the shear blade is separated from the die end face in a state in which the knocker is retracted from the storage portion of the slide tilting portion. The knocker mechanism includes the knocker, an actuator that raises and lowers the knocker, and the like.
With
A locking portion having a cross section orthogonal to the elevating direction of the knocker larger than that above the knocker is formed below the knocker.
In the state where the knocker is stored in the storage portion of the slide tilting portion, the pressure receiving portion that exerts a force for raising the knocker of the actuator on the slide tilting portion via the locking portion. The shear device of the extrusion press device according to claim 1, wherein the slide tilting portion is formed in the storage portion.

Images