JPH08206727A - Extruding press - Google Patents

Abstract

PURPOSE: To enable an extruding stem and a billet pusher to be simultaneously transferred horizontally by providing the billet pusher away from the extruding stem and incorporating the billet pusher in the groove provided in the main cross head. CONSTITUTION: An extruding stem 13 extending to the side of an end platen 1 is attached to a part of stem slider 11 in an extruding press. A billet pusher 20 is attached in a position parallel to and away in the same horizontal direction as the extruding stem 13. The stem slider 11 is horizontally moved on a guide part 11a by operating a part 12 for sliding the stem slider, aligning the extruding stem 13 or the billet pusher 20 on the center of the press, or moving them between positions off the center of the press. The tip of the cylinder 20a of the billet pusher 20 is attached to the stem slider 11, horizontally moving the rear part of this cylinder 20a in the narrow slit groove provided sideways in the main cross head 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion press such as an aluminum sash, and more particularly to an extrusion press having a short machine length to save space and idle time.

[0002]

2. Description of the Related Art An extrusion press is designed so that a billet is loaded into a fixed container, extruded by a stem driven by a ram cylinder, and shaped into a predetermined cross-sectional shape by a die attached to the outlet of the container. Has become. Billets loaded into such a molding machine are supplied by a billet loader, and each billet sent from a billet carrier arranged on the side of the molding machine is gripped one by one, and the billet of the container is billed. It is configured to be transferred to a loading port, delivered by a stem in a state where the billet and the loading port are aligned with each other, loaded into a container, and extruded and pressed to be molded.

When a billet placed on such a billet loader is once loaded into a container, an extrusion press as shown in FIGS. 14 and 15 is used. That is, the stem slider 11 is slidably attached to the tip of the main crosshead 7 in the horizontal direction perpendicular to the axial direction, which is the forward direction of the main crosshead 7. The end platen 1 is attached to a part of the stem slider 11.
An extrusion stem 13 extending to the side is attached, and the extrusion stem 13 is provided so as to be horizontally movable by a stem slider sliding cylinder 12 attached to the side surface of the main crosshead 7. An extendable billet pusher 20 (also referred to as a telescopic cylinder) is attached to the stem slider 11 at the tip of the main crosshead 7 which is slightly separated from the extruding stem 13 in the horizontal direction, and is moved back and forth in the axial direction of the main crosshead 7. It is provided so that it can move freely.

Further, in the conventional extrusion press, as shown in FIG. 14, the length (b) between the virtual downward extension line of the main shear device 27 and the tip working surface 13a of the extrusion stem is as follows:
Compared with the length (L) between the front and rear surfaces of the container 3, L> b. For this reason, the length a between the rear end surface of the container 3 and the tip working surface 13a of the extrusion stem is considerably short.

Using the extrusion press having the above-mentioned structure, first, the container 3 is brought into contact with the die 30, and the extrusion stems 13 retracted to the retracted limit are moved outward from the center of the press by the stem slider sliding cylinder 12. At the same time, after the billet pusher 20 is positioned at the center of the press, the billet 28 placed on the billet loader 14 is conveyed to the center of the press.

Then, the billet pusher 20 is extended to load the billet 28 into the container 3. After loading, the billet pusher 20 is retracted, and subsequently the extrusion slider 13 is moved to the center of the press by the stem slider sliding cylinder 12 and moved forward to extrude the billet 28 through the die 30.

As another method, as shown in FIG. 16, a billet 28 for extrusion is supplied by a billet loader between the container and the die retracted to the outer periphery of the extrusion stem, and the billet 28 is fed between the die and the extrusion stem 13. After sandwiching and holding in the air, there is a method in which the container is advanced to load the billet 28 into the container, and then the extrusion stem is advanced to perform extrusion.

[0008]

However, as in the former case, the billet 28 is positioned between the container 3 and the extruding stem 13 and then loaded into the container 3 by the billet pusher 20, and the die 30 is continuously loaded by the extruding stem 13. The method of extruding the billet 28 via the following has the following drawbacks.

That is, since the length between the rear end surface of the container 3 (the end surface on the side of the extrusion stem 13) and the front end working surface 13a of the extrusion stem is short, the container 3 is retracted after the completion of the extrusion and the main shear device 27 moves it to the die 30. When cutting the remaining discard 44, the container 3 and the extruding stem 13 overlap each other, so the stem slide operation by inserting the next billet 28 is performed after the advancing operation of the container 3 to the die 30 side is completed. The idle time is extended by the amount of slide operation (movement from the center of the press to the machine side). When the container tire needs to be replaced due to wear or the like, it is necessary to remove the extrusion stem 13 because the retreat allowance (a) of the container 3 is small, and it takes time to remove and reattach the extrusion stem 13. The production rate of the product is reduced accordingly. A retractable billet pusher 20 (also called a telesco cylinder) having a role of loading the billet 28 into the container 3 is mounted on the stem slider 11 in parallel with the extrusion stem 13, so that the billet at the time of contraction The entire length of the extrusion press is increased by the minimum length of the pusher 20.

Further, like the latter, the container 3 and the die 3
The billet 28 is positioned between 0 and the container 3
In the method in which the billet is moved into the container 3 and the extrusion stem 13 is moved forward to extrude the billet, the machine length is shortened by the amount of the billet pusher 20 as compared with the extrusion press shown in the former, but the following length is still present. There are such drawbacks.

That is, when the container 3 advances when the billet 28 is loaded, it is necessary to provide a mechanism for allowing the billet loader 14 to escape in accordance with the billet loading operation. Further, the billet loader 14 must be divided into several parts, and the billet loader 14 must be separated from the container 3 side. It is necessary to separately provide an auxiliary loader on the die 30 side, which complicates the mechanism. Further, the short billet 28 cannot be pushed together. Furthermore, since the billet is supplied between the container 3 and the die 30, the idle time for the container open supply and the like becomes longer accordingly.

The present invention has been made in view of the above problems, and an object of the present invention is to supply the billet 28 between the extrusion stem and the container to shorten the machine length to save space and reduce idle time. (EN) An extrusion press that is shortened and is useful for improving productivity.

[0013]

In order to achieve the above object in the present invention, in the first invention according to the present invention, a stem slider is provided at the tip of the main crosshead at a right angle to the axial direction of the main crosshead. It is mounted slidably in the horizontal direction, and a billet pusher is provided at a position separated from the extrusion stem in the lateral direction. The billet pusher is mounted on the stem slider together with the extrusion stem, and is formed in the horizontal direction in the main crosshead and the main ram. In addition, the billet pusher is incorporated in the elongated groove so that the billet pusher can be moved horizontally simultaneously with the extrusion stem. Further, in the second invention, between the tip working surface of the extrusion stem and a virtual extension line vertically downward of the main shear device. A space having a length larger than the width between the front and rear surfaces of the container was provided between the rear end surface of the container and the tip working surface of the extrusion stem.

[0014]

[Function] When the container is retracted and the discard is cut after the billet has been extruded, a constant space is provided between the rear end face of the container and the extruding stem. Since the card cutting operation can be performed at the same time, the idle time can be shortened. Further, in order to save space for the machine length and facilitate container replacement, the dimensional ratio of the width (L) of the container to the length (b) between the main shearing device and the tip working surface of the extrusion stem is used. B>
Since it is L, the container can be replaced smoothly and the productivity can be improved.

[0015]

The specific embodiments of the extrusion press according to the present invention will be described in detail with reference to the drawings.

FIGS. 1 to 7 show one embodiment according to the present invention. FIG. 1 is a vertical sectional view of an extrusion press, FIG. 2 is a plan view of the extrusion press, FIG. 3 is a sectional view of an essential portion in the vicinity of a billet pusher,
4 is a front view as seen from A to A in FIG. 1, and FIG. 5 is B to B in FIG.
FIG. 6 is a front view seen from B, FIG. 6 is a front view seen from C to C in FIG. 1, FIG. 7 is an explanatory diagram of the present invention, and FIGS. 8 to 13 are operation explanatory diagrams.

Reference numeral 1 is an end platen, 2 is a die slide having a die for extruding a product, 3 is a container for loading a billet for extruding a product, 4 is a main cylinder housing,
5 is a main cylinder, 6 is a main ram for product extrusion, 7
Is a main crosshead integrally attached to the tip of the main ram 6, 8 is a tie rod, 9 is a machine base, and 10 is a cylinder for retracting the main crosshead.

A stem slider 11 is attached to the tip of the main crosshead 7 so as to be slidable in the horizontal direction perpendicular to the axial direction, which is the direction of forward and backward movement of the main crosshead 7.
Reference numeral 12 is a cylinder for sliding the stem slider 11 mounted on the side surface of the main crosshead 7.

An extruding stem 13 extending toward the end platen 1 is attached to a part of the stem slider 11, and a billet pusher 20 is attached at a position parallel to the extruding stem 13 and separated in the same horizontal direction. There is.

The stem slider sliding cylinder 1
2 is operated to horizontally move the stem slider 11 on the guide portion 11a so as to align the extrusion stem 13 or the billet pusher 20 on the center of the press, or to move between positions deviated from the center of the press.

At the lower part of the side of the container 3, there is a rotatable support shaft 31 at one end, and a billet loader 14 rotatably supported by the support shaft 31 so as to be movable together with the container 3 is provided. There is. The billet loader 14 transfers and supplies the billet 28 as a molding material to the billet loading port 34 of the container liner 32, which is sent by a billet carrier 35 installed on one side of the extrusion press. Grab the billets 28 one by one, and load the billet in the container 3 while rotating the billet loader 14 from the direction opposite to the stem slider sliding cylinder 12 that does not interfere with the movement of the extrusion stem 13 from the center of the press to the position away from the press center. It is designed to be lifted and moved to the mouth 34.

Therefore, the billet 28 can be transported when the billet loader 14 pivotally supported on the lower portion of the container 3 moves to the position facing the billet carrier 35. The swing arm 36 is provided so as to be rotatable along a plane orthogonal to the center of the press.

At the top and bottom of the container 3, there are container rods 3
7, one end of the container rod 37 is attached, and the other end of the container rod 37 is connected to a container moving cylinder 38 arranged at the upper and lower parts of the main cylinder 5, and a pressure oil is supplied to the container moving cylinder 38. With this, the container 3 can be moved between the die 30 and the extrusion stem 13.

Therefore, the swing arm 36 is bent so as not to interfere with the lower container rod 37 when the billet loader 14 is turned.

When the billet 28 is placed on the billet loader 14 and moved to the center of the press, the billet 28
The billet 28 with the billet loading port 34 concentric with the billet loading port 34.
As shown in FIG. 5, a billet pusher 20 for press-loading the billet into the billet loading port 34 is arranged in parallel on the stem slider 11 slightly separated from the extrusion stem 13.

As shown in FIG. 3, the billet pusher 20 comprises a long cylinder 20a, a billet pressing portion 20b, and a long rod 20c. The tip end of the cylinder 20a of the billet pusher 20 is attached to the stem slider 11, and the rear part of the cylinder 20a is horizontally movable in an elongated slit-shaped groove 39 provided in the lateral direction in the main crosshead 7. It looks like this.

A cylindrical billet pressing portion 20b for directly pressing the billet 28 is screwed and attached to the tip of the rod 20c.

Further, in this embodiment, as shown in FIG. 7, the length (b) between the virtual downward extension line of the main shear device 27 and the tip working surface 13a of the extrusion stem is between the front and rear surfaces of the container 3. B> L as compared with the length L of the container 3, and when the main shear device 27 descends, the container 3 is in the open position (a state in which the die 30 and the container 3 are separated from each other).
The length a between the rear end surface of the container 3 and the tip working surface 13a of the extrusion stem is determined so that the extrusion stem 13 and the extrusion stem 13 do not interfere with each other.

As described above, if the length a between the rear end portion of the container 3 and the tip working surface 13a of the extruding stem is made longer than before, the cylinder 20a of the billet pusher 20 and the rod 20c become longer, but the cylinder 20a becomes longer. Since it is built in the slit-shaped groove portion 39 extending between the main ram 6 and the main crosshead 7, if the dimension a becomes long as in the conventional case, the space for the dimension a increases and the stroke of the cylinder 20a increases. Although the captain had become longer, the captain only needed to be changed due to the increased space for dimension a.

In this embodiment, the size of the dimension a has been described on the assumption that it is the same as the width dimension of the conventional main shear device 27.
It goes without saying that the thickness a should be reduced as much as possible to reduce the dimension a. Reference numeral 33 is a container tire, 27 is a main shear device, 27a is a shear blade, and 40 is a die slide.

The operation of the extrusion press described above will be described.

The container rod 37 is extended to bring the container 3 into contact with the die 30, and the billet loader 14 is rotated and raised to position the billet 28 at the center of the press (FIG. 8).

Next, the billet pressing portion 20b of the billet pusher 20 located at the center of the press is advanced to load the billet 28 into the container 3 via the billet loading port 34 (FIG. 9).

After the billet 28 is loaded into the container 3, the billet pressing portion 20b is quickly retracted to its original position. The stem slider 11 is moved while retracting the billet loader 14 from the center of the press to position the extrusion stem 13 at the center of the press (FIG. 10).

Next, the billet 28 is pressed while advancing the extruding stem 13 to obtain a desired pressed product through the die 30 (FIG. 11).

When the extrusion of the billet 28 is completed, the container moving cylinder 38 is operated while the extrusion stem 13 is retracted by the retraction of the main ram 6, and the container 3 is moved.
Also moves backward (moves to the extrusion stem 13 side). Then, while retreating the container 3, the main shear device 27 continues.
To lower and discard (scraps of billet 28) 44
Is cut and removed by the shear blade 27a (FIG. 12).

After cutting and removing the discard 44, the main shearing device 27 is raised to the original position and retracted, and the stem slider sliding cylinder 12 is operated to move the stem slider 11 outward from the center of the press (to the side of the machine). ), And the billet pusher 20 is again positioned at the center of the press to complete one cycle (FIG. 1).
3).

[0038]

As is apparent from the above description, in the first aspect of the present invention, the stem slider is slid on the tip of the main crosshead in the horizontal direction perpendicular to the axial direction of the main crosshead. It is movably mounted, and a billet pusher is provided at a position laterally separated from the extrusion stem, and is placed on the stem slider together with the extrusion stem, and in a horizontally elongated slot formed in the main crosshead and the main ram. The billet pusher is built in to enable horizontal movement simultaneously with the extrusion stem.

In the second invention, the space between the front end working surface of the extrusion stem and the virtual downward extension line of the main shearing device is made larger than the width between the front and rear surfaces of the container. Since it is provided between the rear end surface of the container and the tip working surface of the extrusion stem, the stem slide operation can be performed at the same time as the shear cutting operation without increasing the machine length (overall length) of the extrusion press, so that the idle time can be shortened. In addition, it is not necessary to remove the extrusion stem or the fixed dummy block each time when changing the container,
The space of the equipment can be saved, and the time for exchanging containers can be greatly shortened, and the productivity can be greatly improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an extrusion press.

FIG. 2 is a plan view of an extrusion press.

FIG. 3 is a sectional view of an essential part near the billet pusher.

FIG. 4 is a front view seen from AA of FIG.

5 is a front view as seen from BB of FIG. 1. FIG.

FIG. 6 is a front view seen from CC of FIG.

FIG. 7 is an explanatory diagram of the present invention.

FIG. 8 is an operation explanatory diagram of the present invention.

9 is an explanatory diagram showing a continuation of the operation following FIG. 8. FIG.

10 is an explanatory diagram showing a continuation of the operation following FIG. 9. FIG.

11 is an explanatory diagram showing a continuation of the operation following FIG. 10. FIG.

12 is an explanatory diagram showing a continuation of the operation following FIG. 11. FIG.

FIG. 13 is an explanatory diagram showing a continuation of the operation following FIG.

FIG. 14 is a schematic vertical sectional view of a conventional extrusion press having a billet pusher while carrying a billet between a container and an extrusion stem.

15 is a cut front view seen from DD in FIG. 14. FIG.

FIG. 16 is a schematic vertical cross-sectional view of a conventional extrusion press that carries a billet between a die and a container.

[Explanation of Codes] 1 End Platen 2 Die Slide 3 Container 4 Main Cylinder Housing 5 Main Cylinder 6 Main Ram 7 Main Cross Head 8 Tie Rod 10 Cross Head Retracting Cylinder 11 Stem Slider 12 Stem Slider Sliding Cylinder 13 Extrusion Stem 13a Extrusion Stem Tip working surface 14 Billet loader 20 Billet pusher 20a Cylinder 20b Billet pressing part 20c Rod 27 Main shear device 27a Shear blade 28 Billet 30 Dice 31 Spindle 34 Billet loading port 37 Container rod 38 Container moving cylinder 39 Slit groove 40 Die slide 42 Press product 44 Discard

Claims (2)

[Claims] 1. A stem slider is slidably attached to a tip end portion of a main crosshead in a horizontal direction perpendicular to an axial direction of the main crosshead, and a billet pusher is provided at a position separated laterally from an extrusion stem. It is mounted on the stem slider together with the extrusion stem, and the billet pusher is built in a horizontally elongated slot formed in the main crosshead and the main ram so that the billet pusher can move horizontally simultaneously with the extrusion stem. And extrusion press. 2. A container rear end surface and an extrusion stem are provided with a space portion in which a length between a front working surface of the extrusion stem and a virtual downward extension line of the main shear device is larger than a width length between front and rear surfaces of the container. An extrusion press provided between the tip working surfaces of the.