JPH07100169B2 - Extrusion press - Google Patents

Description

TECHNICAL FIELD The present invention relates to an extrusion press for extruding a billet held by a container with an extrusion stem to extrude it from a hole of a die to obtain a product.

[Conventional technology]

Among the extrusion presses of this type, the indirect extrusion press has hitherto been the fifth type.
The figure is configured to show a schematic side view near the container. That is, the extrusion press 1 is equipped with a loose dummy 2 attached to the tip end thereof and an extrusion stem 3 which is moved forward and backward in the axial direction by a main ram (not shown) with the position shown in the figure as the forward limit, and a fixed die stem 4. An inner hole 4a is provided so as to penetrate the shaft core portion of the. The die stem 4 is fitted with a cylindrical container 5 that advances and retreats in the axial direction with a cylinder as a forward limit at the position shown in the figure.
Behind the container 5, a dummy receiver 6 is provided which moves integrally with the container 5 in the axial direction and is movable between the paper spine side and the front side in the figure at the stop position of the container 5. ing.

Further, above the rear end surface of the container 5 at the forward position shown in the drawing, there is provided a shear 7 which is moved up and down along the end surface of the container 5 by a cylinder (not shown) in a direction orthogonal to the axis thereof. A cylindrical billet, which is an extruded material supplied by a billet loader, is movably held in the axial direction in the inner hole of the container 5 at a retracted position (not shown). Has
A container 5 with a die 8 having an extrusion hole attached
Is fitted in the inner hole of the. The billet is compressed by the forward movement of the extrusion stem 3 and the container 5, and is extruded from the extrusion hole of the die 8 into the inner hole 4a to be a product 9. Numeral 10 is a discard which remains as an extruded lees left after this extruding. After extruding, the container 5 is further advanced to the state shown in FIG. ing.

Further, in the vicinity of the rear end of the container 4 in the solid line position, a projecting cylinder 12 is provided supported by, for example, a rotatable arm 11 attached to the dummy receiver 6, and the projecting cylinder 12 is provided with the arm. It is configured to move along an arcuate locus between an operating position concentric with the hole of the die 8 shown in the figure and a retreat position outside the machine by the rotation of 11. It should be noted that the protruding cylinder 12 is not limited to one that turns in an arc shape as described above, but there is one that is configured to move horizontally on the rail.

The operation of the conventional extrusion press configured as described above will be described. If the billet supplied by the billet loader is conveyed onto a receiver (not shown) while the container 5 is at the forward position shown and the dummy receiver 6 and the protruding arm 12 are retracted out of the machine, the container 5 Moves backward from the illustrated position in the direction of the arrow to hold the billet in the inner hole, and the billet loader moves back to the outboard position.

Next, driven by the main ram, the extrusion stem 3 moves forward, and at the same time, the container 5 moves forward, so that the billet is compressed by the extrusion stem 3 and becomes a product 9 from the extrusion hole of the die 8 into the inner hole 4a of the die stem 4. Extruded. When the extrusion is completed, the extrusion stem 3 is retracted and the container 4 is advanced to the position shown in the figure, so that the discard 10 as an extrusion meal projects from the rear end surface of the container 5.

Then, the shear 7 descends, the discard 10 is sheared from the product 9 and separated from the die 8, falls in the chute, and is collected at a collecting position. Subsequently, the shear 7 rises and withdraws from the shaft core of the container 5, and the dummy receiver 6 moves from the paper back side to the front side in the figure to support the loose dummy 2, and the clamp (not shown) holds the loose dummy 2 in place. Hold it. When the arm 11 rotates in this state, the projecting cylinder 12 rotates to a position concentric with the die 8 and the container 5, and the projecting pin 13 moves forward and enters the extrusion hole of the die 8, so that the product 9 After that, the end portion comes out of the extrusion hole of the die 8 and is conveyed by a puller (not shown).

At this time, when the discard 10 is cut from the product 9 by the shear 7 and then the product 9 is pulled in the waste product extruding direction by the puller, the resistance between the hole of the die 8 and the product 9 causes the die 8 part. Since the product 9 is cut in the middle of the product 9 and the product 9 becomes defective, and an extra work is required to remove the product 9 cut from the die 8 part, etc., the product 9 is sheared by the shear 7 and then the product 9 is cut. It is necessary to project the holes from the hole of the die 8.

After that, the projecting pin 13 is retracted, the arm 11 is rotated, the projecting cylinder 12 is swung back to the outside position, and the dummy receiver 6 is retracted to the paper spine side in the figure.

[Problems to be Solved by the Invention]

In the conventional extrusion press which operates as described above, since the protruding cylinder 12 and its swivel device are provided in addition to the shear 7 as described above, the structure is complicated and the area occupied by the device is increased. There is a problem that Further, when shearing the discard 10 by the shear 7, the shear 7 descends--the shear 7 rises and retreats--the arm 11 pivots to move the protruding cylinder 12 to the protruding position--the protruding pin 13 advances to project the product 9-- Since many operations of retreating the projecting pin 13-retracting the projecting cylinder 12 by pivoting the arm 8 are required, the cycle time is extended, the productivity is reduced, and the product 9 is stored in the inner hole 4a of the die stem 4. It may disconnect.

The present invention has been made in view of the above points, and an object thereof is to provide an extrusion press capable of simplifying the structure and shortening the cycle time.

[Means for Solving the Problems]

In order to achieve such an object, in the present invention, a shear for advancing and retracting in a direction orthogonal to the extrusion core to shear the extrusion meal,
A product projecting device for projecting the end of the extruded product out of the die was provided.

[Action]

When the billet is extruded through the extrusion hole of the die and the shear is lowered with the extruded meal protruding from the container, the extruded meal is sheared from the product, so the product ejection device provided in the shear is operated in this state. Then, the end of the extruded product is projected out of the die. That is, it is not necessary to move the shear out of the extrusion position in order to project the product. When the end of the product is projected outside the die, the product is pulled out by a puller or the like in the extrusion direction.

〔Example〕

1 to 4 show an embodiment of an extrusion press according to the present invention. FIG. 1 is a vertical sectional view near the shear, FIG. 2 is an enlarged vertical sectional view of the lower end of the shear, and FIG. 3 is an extrusion press. An overall side view, FIG. 4 is a schematic side view of the extrusion press shown for explaining the operation of the extrusion press. As shown in FIG.
The extrusion press 20 includes a cylinder platen 22 and an end platen 23 that are erected on the bed 21 so as to face each other. The platens 22 and 23 are connected at their four corners by tie rods 24. A main ram 25 is fixed to the cylinder platen 22, and the main ram 25 is moved back and forth between a solid line position and a chain line position as shown by an arrow A in FIG. The extruded stem 27 is connected via a crosshead 28. Meanwhile, End Platen 23
The die stem 30 is fixed to the die slide 29 attached to the.
Are provided so as to penetrate therethrough. A cylindrical container 32, which advances and retracts between a solid line position and a chain line position by a cylinder 31 as shown by an arrow B in the figure, is fitted to the die stem 30. The container 32 is a container liner 32 in order from the inside.
It is formed by a, a container tire 32b, and a container holder 32c. 33 is a heater housed in the hollow portion of the container holder 32c. A receiver 34 is provided in the rear of the container 32 so as to be integrated in the axial direction and movable between the paper spine side and the front side in the figure. Reference numeral 35 denotes a cylindrical billet as an extruded material, which is supported by the free end portion of an arm 37 provided in the billet loader 36, and the free end portion of the arm 37 moves in an arcuate locus by the rotation of the arm 37, Billet 35
Is transported from the outboard position to a position coaxial with the axis of the container 32 shown in the figure and supported on the receiver 34. And at the rear end adjacent position of the die stem 30,
The die 38 having the extrusion hole 38a is fitted in the inner hole of the container 32, and is driven by the main ram 25 to advance the extrusion stem 27 and at the same time the container 32 advances to the solid line position,
The billet 35 is compressed by the extrusion stem 27 and extruded as a product 39 from the extrusion hole of the die 38 into the hole 30a of the die stem 30. Reference numeral 40 is a discard as an extruded lees left after the billet 35 is extruded. In the shearing position shown in FIG. 1, it is adjacent to the rear end of the die 38 and protrudes rearward from the inner hole of the container 32. .

Further, above the rear end surface of the container 34 at the forward position shown by the solid line, a shear lifting cylinder 41 is provided supported on the machine body side, and the lower end portion of the piston rod is enlarged in FIG. A cylindrical shear holder 42 shown is connected, and a shear 43 that shears the discard 40 by descending is bolted to the lower end of the shear holder 42 so as to be movable in the front-rear direction. A mounting hole 44 provided above the shear 43 has a cylindrical bearing 45 with a collar.
Is fixed by bolting the collar portion to the peripheral edge portion of the mounting hole 44, and in the inner hole of the bearing 45,
The guide 46a of the protruding cylinder 46 is fitted and fixed. A piston rod 48 having a protruding pin 47 attached to the tip end is fitted in the inner hole of the guide 46a so as to be able to move forward and backward, and oil or air should be sent to either of the ports 50a, 50b. Thus, the projecting pin 47 moves back and forth together with the piston rod 48 and moves back and forth within the extrusion hole 38a of the die 38. Reference numeral 51 is a key groove into which the key 52 on the guide 46a side is slidably fitted, and is configured to restrict the rotation of the piston rod 48 to advance and retreat. 53 and 54 are shoots for sliding the discard 40.

The operation of the extrusion press configured as above will be described.
When the billet 35 is conveyed onto the receiver 34 by rotating the arm of the billet loader 36 when the container 32 is in the solid line position, the extrusion stem 27 advances to an intermediate position, and then the container 32 moves the receiver 34. As it moves in the direction of arrow B, the billet 35 is fitted and held in the inner hole of the container 32, and the billet loader 36 retreats to the outboard position. At that time, the die 38 is attached to the end of the die stem 30.

Then, the extrusion stem 27 is driven forward by the main ram 25, and at the same time, the container 32 is advanced to the solid line position.
The billet 35 is compressed by the extrusion stem 27 and extruded as a product from the hole of the die 38 into the hole 30a of the die stem 30.
When the extrusion is completed, the container 32 further advances, so that the discard 40 as the extrusion meal projects from the rear end surface of the container 32. At this time, the receiver 34 moves from the paper back side to the front side in the figure to support the loose dummy 26. Then, the piston rod of the shear cylinder 41 descends and the shear holder 42 integrated with the piston rod descends, so that the shear 43 descends along the rear end surface of the container 32 and the discard 40 is sheared. The sheared Discard 40 shoots 53,54
Glide over and be collected.

When the shear 43 is lowered, the protrusion pin 49 is set to be concentric with the extrusion hole 38a of the die 38 by the action of a stopper or the like (not shown) for stopping the shear 43. When the piston rod 48 of 46 advances, the projecting pin 49 enters the extrusion hole 38a of the die 38, so that the rear end of the product 39 comes out of the extrusion hole 38a of the die 38 and is conveyed by a puller (not shown). After that, the projecting pin 12 retracts, the shear 43 rises, and the receiver 34 retracts to the paper spine side in the figure.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, in the extrusion press, a shearing device that advances and retracts in the direction orthogonal to the extrusion core to shear the extrusion meal is provided with a product projecting device that projects the end of the extruded product out of the die. Therefore, after shearing the extruded meal by the shear, the projecting cylinder can be operated in that state without raising the shear to project the rear end of the product from the extrusion hole of the die. Time is shortened and productivity is improved. Further, since the projecting cylinder is housed in the shear and it is not necessary to provide a rotating arm or the like, the structure is simplified and the area occupied by the device is reduced. Further, the product is not cut in the inner hole of the die stem, and the amount of defective products is reduced.

[Brief description of drawings]

1 to 4 show one embodiment of an extrusion press according to the present invention. FIG. 1 is a vertical sectional view near the shear, FIG. 2 is an enlarged vertical sectional view of the lower end of the shear, and FIG. 3 is an extrusion. FIG. 4 is a side view of the entire press, FIG. 4 is a schematic side view of the extrusion press shown for explaining the operation of the extrusion press, and FIG. 5 is a schematic side view of the conventional extrusion press near the container. 20 …… Extrusion press, 30 …… Diestem, 38 …… Dice,
39 …… Product, 40 …… Discard, 43 …… Shear, 46…
… Projection cylinder, 47… Projection pin, 48… Piston rod.

Claims (1)

[Claims] 1. An extrusion press characterized in that a shear for advancing and retracting in a direction orthogonal to an extrusion core to shear an extrusion meal is provided with a product projecting device for projecting an end of an extruded product out of a die.