JPH071035A - Shear equipment for extrusion press - Google Patents

Abstract

PURPOSE:To make a cutting and a separation operations speedy by projecting a discard from the rear surface of a container, making a shear slide move in the vertical direction, cutting the discard by a shear blade, and pushing the discard off after lowering a knocker. CONSTITUTION:After a product 16 is extruded from a die, since a discard 14 which is the remainder of a billet, is integrated with the product 16, it is cut by a shear blade 24. The shear blade 24 is allowed to lower by operating a shear cylinder 18, the discard 14 is peeled off from the die, and the discard 14 and the product 16 are cut to separate them. Next, the descend of a shear slide 22, is controlled by butting the lower part of a control lever 40 on a lower stopper 46b, and a knocker rod 30 engaged with a decantation lever 34, is allowed to lower in the vertical and downward direction along the shear slide 22, and the discard 14 attached to the shear blade 24, is separated by a knocker main body 28. Consequently, the cutting and the separation of the discard 14, can be made speedy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing device for separating a discard (or a cake) from a product extruded from a die, and more particularly to a technique for realizing a high cycle of shearing operation.

[0002]

2. Description of the Related Art In a conventional shearing device in a direct extrusion press, a shearing guide frame is fixedly mounted on an upper side of an end platen via a bracket, and a shearing cylinder is disposed above the shearing guide frame. . The shear cylinder is provided with a shear guide frame and a shear slide vertically movable in the vertical direction along the shear guide at the tip of the piston rod. A shear blade is attached to the lower side of the central portion of the shear slide. On the other hand, a knocker is provided so as to be vertically slidable adjacent to a concave portion having a cross section of an oval shape along the axial direction of the center of the shear blade. Page (2)

In such a conventional shearing device, following the shearing blade at the lowering limit of the shearing blade, a knocker descending signal for descending the knocker is issued to throw away the discard discharged by the shearing blade with the knocker. Has become.

[0004]

However, in the shear device described above, the inside signal of the knocker is output electrically, and the operation valve for supplying the pressure oil to the knocker cylinder for lowering the knocker is opened to open the inside of the cylinder. Since the knocker starts descending after the introduction of pressure oil, there has been a problem that the operation time becomes long and a high cycle cannot be performed.

The present invention has been made in view of the above problems, and provides a shearing device for an extrusion press in which the discarder is mechanically pushed out by the knocker body without interruption after the discarding is performed by the shearing blade. It is in.

[0006]

In order to achieve the above object, a shear device of an extrusion press according to the present invention is provided at a tip end portion of a shear slide which is connected to a shear cylinder and slides vertically in a shear guide. A shear blade for cutting the extruded product and the remaining discard of the billet, and a link mechanism having a tilt lever on the side surface of the shear slide are provided, and one end of the tilt lever is engaged with the knocker rod, While moving up and down in the shear slide, the knocker body that separates the discard and the product by pushing the discard attached to the shear blade from the crossing direction with the pushing direction, and the other end of the tilting lever is used to move the knocker body. The structure is such that it is mechanically subordinated to the vertical movement of the shear blade and is provided with a regulating lever which is regulated by a vertical stopper.

[0007]

In the shearing device of the extrusion press of the present invention, the extrusion stem is moved forward to complete the page (3) extrusion, and then the container is retracted so that the discard is projected from the rear surface of the container. The shear slide of is moved vertically from the direction intersecting with the extrusion direction to cut the discard with the shear blade, and at the same time, the knocker is mechanically lowered to push away the discard.

[0008]

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

FIG. 1 is a vertical sectional view of a shearing device of an extrusion press according to an embodiment of the present invention, and FIG. 2 is a front view of the shearing device.
3 is a cross-sectional view as seen from A to A in FIG. 1, and FIG. 4 is B in FIG.
5B is a horizontal cross-sectional view, FIG. 5 is a vertical cross-sectional view showing the extruded state of the billet, FIG. 6 is an explanatory view showing the cutting state of the discard by the shear blade, and FIG. 7 shows the discarding state of the discard by the knocker. FIG. An end platen 2 is fixed to one end side of a machine base (not shown). The end platen 2 has a lower portion on the side facing an extruding cylinder (not shown) protruding to form a die supporting portion 8. On the die supporting portion 8, a die slide 10 is installed slidably in the machine width direction. There is. A die 12 is held on the die slide 10.

A shear guide frame 4 is fixedly mounted on the upper side of the end platen 2 via a bracket 3, and a shear cylinder 18 is provided on the upper side surface of the shear guide frame 4.
Is provided. A shear slide 22 that is vertically strokeable along the shear guide frame 4 and the shear slide retainer 20 is fixed to the tip of the piston rod 18a of the shear cylinder 18. A shear blade 24 is attached to the lower side of the central portion of the shear slide 22. A recess 26 having a circular cross section is cut out along the axial direction of the shear slide 22 on the rear surface side of the shear slide 22 substantially at the center thereof, and the knocker main body 28 is connected to the knocker rod 30 to connect the shear slide 22. It can slide up and down inside. Further, a piston (4) 31 is provided on both ends of the upper part of the knocker rod 30.

A knocker drive device 32 having a link mechanism is disposed above the rear surface of the shear slide 22 (on the container side). The knocker drive device 32 includes the tilt lever 3
4, a pinion 36, a shaft 38, a restriction lever 40, and a knocker drive block 42. A pair of tilting levers 34 are provided on both side surfaces of the knocker rod 30, and one end of the tilting lever 34 is provided with a long slit 45 in the axial direction from the end surface, and the long slit 44 is attached to the pin 31.
The lid is engaged with the bolt and is attached by bolts so that it cannot be removed.

The other end of the tilting lever 34 is rotatably attached together with a pinion 36 to a shaft 38 penetrating the knocker drive block 42. As shown in FIG. 3, on the front surface side of the knocker drive block 42, a rack-shaped restricting lever 40 engaged with the pinion 36 is vertically slidably enclosed while being fixed to the guide rod 40a. Is provided. Further, stoppers 46 for restricting the vertical movement of the restriction lever 40 are provided above and below the shear device 6, an upper stopper 46a is on the upper front surface of the shear guide frame, and a lower stopper 46b is on the lower front surface of the shear slide retainer 20. Each is fixed. Reference numeral 48 is a container, 50 is a billet, 52 is an extrusion stem, 54 is a ram, and 56 is a free dummy block.

The operation when using the shearing device in the extrusion press configured as described above will be described. First,
After the container 48 is brought into contact with the end surface of the die 12, the billet 50 is filled into the container 48, and then the extrusion stem 52 is advanced (FIG. 5).
Is extruded from. The container 48 is retracted when the billet 50 has been extruded to the limit.

At this time, since the discard 14 which is the rest of the billet 50 is integrated with the product 16 into a page (5), the shear blade 24 cuts.
At this time, the front end face of the discard 14 and the die 12
The rear end face is located vertically below the blade edge of the shear blade 24. Then, as shown in FIG. 6, by operating the shear cylinder 18, the shear blade 24 is lowered to peel the discard 14 from the die 12 and cut and separate the discard 14 and the product 16.

In this state, the lower end of the regulating lever 40 comes into contact with the lower stopper 46b to regulate the downward movement of the shear slide 22. As shown in FIG. 7, this regulating operation is performed by the tilting lever 34 via the pinion 36. The knocker rod 30 that has been transmitted and engaged with the tilt lever 34 and the pin 31 is mechanically moved vertically downward along the shear slide 22. Thus, the discard 14 attached to the shear blade 24
Are separated by the knocker main body 28. When the shear cylinder 18 returns, the shear slide 22 rises and returns to its original position. When the shear slide 22 is moved upward, the upper end of the regulating lever 40 is moved to the upper stopper 46a.
And the tilt lever 34 is returned to the original position.

[0016]

As is apparent from the above description, the shearing device of the extrusion press according to the present invention is extruded onto the tip of the shear slide which is connected to the shear cylinder and slides vertically in the shear guide. The shear blade for cutting the formed product and the remaining discard of the billet and a link mechanism having a tilting lever on the side surface of the shear slide are provided, and one end of the tilting lever is engaged with the knocker rod, and the shearing lever is provided. While moving up and down in the slide, the knocker main body that separates the discard from the product by pushing the discard attached to the shear blade from the crossing direction and the pushing direction, and the other end of the tilting lever is used to move the knocker main body to the shear. A shear lever is provided that is mechanically dependent on the vertical movement of the blade and has a regulating lever that regulates with a vertical stopper. Cleavage of discard for downward movement of the knocker body just lowering operation is mechanically performed without electrical signals mediated speed of separation can be achieved. Further, since the knocker main body is continuously lowered without using the actuator (6) eater, the knocker main body is continuously moved down, the mechanical structure is simplified and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a shear device of an extrusion press according to an embodiment of the present invention.

FIG. 2 is a front view of a shear device.

FIG. 3 is a cross-sectional view as seen from AA of FIG.

FIG. 4 is a cross-sectional view as seen from BB of FIG.

FIG. 5 is a vertical sectional view showing an extruded state of the billet.

FIG. 6 is an explanatory diagram showing a cutting state of discard with a shear blade.

FIG. 7 is an explanatory diagram showing a state of discarding a discard by a knocker.

[Explanation of symbols]

 6 shear device 10 die slide 12 die 14 discard 16 product 18 shear cylinder 22 shear slide 24 shear blade 28 knocker body 30 knocker rod page (7) 31 pin 32 knocker drive device 34 tilting lever 36 pinion 40 regulating lever 42 knocker drive block 44 Regulation Lever Guide Frame 46 Stopper 46a Upper Stopper 46b Lower Stopper

Claims (1)

[Claims] 1. A shear blade that is connected to a shear cylinder and cuts off a product extruded from the tip of a shear slide that slides vertically in a shear guide and the remaining discard of the billet, and a shear blade of the shear slide. A link mechanism having a tilt lever is provided on the side surface, and one end of the tilt lever is engaged with the knocker rod to move vertically in the shear slide to move the discard attached to the shear blade from the crossing direction with the pushing direction. A knocker body for pushing and separating the discard and the product, and a regulating lever for mechanically substituting the other end of the tilting lever for the movement of the knocker body with the vertical movement of the shear blade and for regulating with a vertical stopper are provided. A shear device for an extrusion press, which is characterized in that