JPS6142648Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an indirect extrusion press equipped with a die that scalps shells adhering to the inner surface of a container during extrusion, and removes the shells transferred and adhering to the outer circumferential surface of the die while the die is attached to the die stem. This invention relates to an indirect extrusion press.

When the die that defines the external shape of the extruded product is used to scalp the shell that adheres to the inner surface of the container during extrusion, and where the shell transfers and adheres to the die for retention or storage, there is an advantage that the press cycle time can be shortened.

However, in order to reuse such a die, the transferred shell must be removed.

Therefore, it takes a lot of effort to take the die out of the press and remove it after extrusion is finished, and not only does the shell removal device become complicated, but the cycle time for reattaching the die to the die stem after the removal process is is necessary, and does not substantially contribute to shortening the press cycle time.

Further, it is difficult to remove the shell transferred and attached to the die stem while the die is attached to the die stem without being restricted by extrusion tools.

This invention was devised in view of the above-mentioned actual situation.
As an example, the case where it is applied to an intermediate frame indirect extrusion press will be described in detail with reference to FIGS. 1 to 4, and the gate lock type indirect extrusion press will be described in detail with reference to FIGS. Describe.

In FIGS. 1 to 4, reference numeral 1 denotes an extrusion force generating device, which consists of a main cylinder and a main ram oil-tightly fitted into the main cylinder, and is provided on one press platen 8A.

A pressurizing stem 12 is connected to the press axis via a crosshead 3 to the main ram, and the pressurizing stem 12 is movable without load via a side cylinder device 2.

The pair of press platens 8 and 8A are firmly connected by columns 4 arranged diagonally to form a rigid frame press frame, and a cylindrical die stem 18 is placed on the press axis of the front platen 8 for a container. It extends towards 15. Note that "front" refers to the pressing direction, and "rear" refers to the opposite direction, and will be referred to in the same manner hereinafter.

A die assembly 22 is provided at the extending end of the die stem 18 via a die holder 17 having a die 16 that defines the outer shape of the extruded product, and the die assembly 22 is constructed as shown in FIGS. 9 and 10. ing.

In FIG. 9, the root portion of the die holder 17 is inserted into and fixed to the die stem 18, and a square shell storage portion 24 in this example is formed on the outer peripheral surface of the main body portion via a step portion 23.
is formed, and in FIG. 10, the shell storage part 2
4 is formed as a concave circumferential groove with a stepped portion 23 interposed therebetween.

In both embodiments, the front edge 25
is larger in diameter than the edge 26 on the rear side, and the shell adhering to the inner surface of the container during extrusion is scalped through the edge 25 and stored in the shell storage section 24 with reference numeral 2.
7, it is possible to transfer and attach.

In addition, in FIGS. 1 to 4, 5 is a holder for a container 15, and a container moving cylinder 11
It is movable via the hydrocup cylinder 10 and is connected to the crosshead 3 side via the hydrocup cylinder 10.

Reference numeral 7 denotes an intermediate frame, which is fitted around the die stem 18 through the expansion and contraction of the movable cylinder 9 and is movable in the axial direction thereof.The intermediate frame 7 is provided with a shear cylinder 6. Also, 14 is billet, 1
3 indicates a push plate.

In the first embodiment shown in FIGS. 1 to 4, a die shell removing device 28 is provided on the intermediate frame 7 which is movable in the axial direction of the die stem 18.

FIG. 9 shows a first embodiment of the shell removing device 28, and the shell removing device 28 includes a scraper 30 provided via a slide guide 29 on the intermediate frame 7 at a position corresponding to the shell storage portion 24, and and a drive body 31 that slides on the outer circumferential surface of the shell storage section 24. In this embodiment, scrapers 30 are provided corresponding to two opposing surfaces of the shell storage section 24, which are rectangular in shape. It is provided on the intermediate frame 7 via a slide guide 29, and each scraper 30 is provided with a cylinder 32 that is extendable and retractable to a position where it advances to two opposing faces of the shell storage section 24 and a position where it retreats. .

FIG. 10 shows a second embodiment of the shell removing device 28. In this embodiment, a ring gear 33 is fitted around a die assembly 22 having a shell storage portion 24 formed as a concave circumferential groove on a concentric circle. A tongue-like scraper 30 is attached to the inner peripheral surface of the ring gear 33 via a pin assembly 34, and the ring gear 3
3 is rotatable around its axis and mounted on the intermediate frame 7 via a holder 35 etc., a drive pinion gear 36 is engaged with the ring gear 33, and the pinion gear 36 is driven by a drive body 37 represented by a motor. No, the entire assembly is provided with a drive body 31 represented by a telescoping cylinder 38 which allows the scraper 30 to be freely engaged and detached from the concave circumferential groove via a ring gear 33.

Therefore, the intermediate frame shape shown in FIGS. 1 to 4 is provided in which the shell removing device 28 according to the embodiment shown in FIG. 9 or FIG. In the press cycle of the indirect extrusion press, as shown in FIG.
As shown in the figure, the pressurizing stem 12 is advanced through the extrusion force generating device 1, and the container 15 is also advanced, so that the container 15 is moved to the die stem 1.
The extruded material A is indirectly extruded so as to cover the parts 8 and 8.

During this extrusion, the shell adhering to the inner surface of the container is scalped by the edges 25 shown in FIGS. 9 and 10, and is transferred and adhered to the shell storage section 24.

After the extrusion is completed, the container 15 is moved back toward the pressure stem 12 through the extension of its cylinder 11, the intermediate frame 7 is moved back through the extension of its cylinder 9, and the shell removing device 28 provided on the intermediate frame 7 is moved back. The scrapers 30 are made to correspond to the shell storage portions 24, respectively.

Thereafter, in the first embodiment shown in FIG.
By alternately extending and contracting the drive body 1, the scraper 30 moves back and forth to two opposing faces of the drive body 3 to remove the shell.
The shell is removed by engaging the scraper 30 with the shell 27 with one extension, transmitting the rotational force of the drive body 37 to the ring gear 33 via the pinion gear 36, and rotating the scraper 30 in the direction of the arrow.

When this shell removal work is completed, the scraper 30 is moved backward, the shear device 6 provided on the intermediate frame 7 is brought into contact with the pressed lees 21, and the pressing plate 13 is attached as shown in FIG. 4 through the extension of the shear blade. The pressed lees 21 are cut and separated from the extruded material A, and carried out of the press via a tray (not shown), etc., and one cycle is completed by returning the shear device 6 to its old position. 5 to 8 show a gate-lock type indirect extrusion press, in which the die stem 18 has a pair of engagement recesses 39 on its longitudinally intermediate outer periphery, and a gate 40 (not shown) is provided in each of the engagement recesses 39. The die stem 18 can be freely engaged and detached from the press platen 8 in the axial direction by being engageable and detachable via the cylinder, and the shear device 6
The first point is that the die stem guide frame 41 is attached to the press platen 8 and the die stem guide frame 41 is fitted onto the die stem 18 so that it can be moved back and forth by the cylinder 42.
Unlike the indirect extrusion press shown in Figures 4 to 4,
Since the basic configuration is the same as that shown in FIGS. 1 to 4, common parts are indicated by common symbols.

However, in the presses shown in FIGS. 5 to 8, the die stem guide frame 4 is used as a movable member that moves the shell removing device 28 in the axial direction of the die stem 18.
1, and as shown in FIG. 7, when the gate 40 is released, the die stem guide frame 4
The shell removal device installed in 1 (its configuration is shown in Figure 9)
Scraper 30 (same as that shown in Fig. 10)
The shell is removed from the shell storage portion 24 in the same manner as described above.

11, 2 and 12, the present invention is applied to a loose die, and the die assembly 22 is a die 16A having a die 16,
The die 16A is removably mounted on the end face of the die holder 17, and the rest of the configuration is the same as in the previous example, so the same members are designated by the same reference numerals.

In short, the present invention consists of a die stem 18 that is provided at the press axis on the rear end surface of the press platen 8 and extends toward the container 15, and is used to scalp a shell adhering to the inner surface of the container during extrusion and to define the outer shape of the extruded product. In the indirect extrusion press, the assembly 22 is fixed to or detachable from the extending end of the die stem 18. A shell reservoir 24 is formed on the outer peripheral surface of the die assembly 22 via a step 23, and a scraper 30 and a drive body 31 that slides the scraper 30 on the outer peripheral surface of the shell storage section 24.
8 is provided on a movable member 7, 41 such as an intermediate frame that is movable in the axial direction of the die stem 18, so that the shell attached to the inner surface of the container during extrusion can be scalped with the die assembly 22. However, the shell 27 transferred and attached to the die assembly 22 does not need to be taken out of the press.
can be reliably removed using one step of the press cycle time.

At that time, since the shell removing device 28 is provided on a movable member such as the intermediate frame 7 or the die stem guide frame 41 that can move in the axial direction of the die stem 18, the scraper 30 and the shell storage section 24
The corresponding positional relationship between the shells 27 can be easily and accurately determined, and the shells 27 can be removed accurately by forming the shell storage portion 24 into an even polygon and by alternately slidingly contacting two opposing surfaces of one of them with the scraper 30. Furthermore, by forming the shell storage portion 24 with a concave circumferential difference and providing a scraper 30 on a ring gear 33 that rotates along this groove, the shell can be removed in one rotation.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and include FIGS. 1 to 4.
The figure is a cross-sectional view of each process of an intermediate frame type indirect extrusion press showing one press cycle from billet charge to shear process. Figures 1 and 2 are a front view and a sectional view of the first embodiment of the shell removal device, and Figures 1 and 2 are the second embodiment of the shell removal device.
11 is a front view and a sectional view of the third embodiment, and FIGS. 12, 1 and 2 are a front view and a sectional view of the fourth embodiment. DESCRIPTION OF SYMBOLS 1... Extrusion force generating device, 7... Intermediate frame (movable member), 12... Pressure stem, 15... Container, 18... Die stem, 22... Die assembly, 23... Step portion, 24... ...Ciel reservoir, 28
... Shell removing device, 30 ... Scraper, 31
... Scraper drive body, 41 ... Die stem guide frame (movable member).

Claims (1)

[Claims for Utility Model Registration] 1. A die stem 18 is provided on the press axis at the rear end surface of the press platen 8 and extends toward the container 15, and scalps the shell adhering to the inner surface of the container during extrusion, and also scalps the extruded product. A die assembly 22 defining the outer shape is attached to the die stem 1.
In the indirect extrusion press, which is fixedly or removably installed at the extending end of the die assembly 22, a shell storage section 24 is formed on the outer circumferential surface of the die assembly 22 via a step 23, and a shell storage section 24 is formed on the outer peripheral surface of the die assembly 22. A shell removing device 28 consisting of a drive body 31 that slides a scraper 30 on the outer circumferential surface of the shell storage section 24 is provided on movable members 7, 41 such as intermediate frames movable in the axial direction of the die stem 18. Features an indirect extrusion press. 2. A shell storage portion 24 is formed on the outer periphery of the die body portion in an even polygonal shape via a stepped portion 23,
Scrapers 30 are provided corresponding to one two opposing surfaces of the shell storage section 24, respectively, and each of the scrapers 30 can be driven to extend and retract to a position where it advances to one of the two opposing surfaces of the shell storage section 24 and a position where it retreats. An indirect extrusion press according to claim 1, characterized in that each of the scrapers 30 is provided with a driving body 32 having the following characteristics. 3 The shell storage portion 24 is a concave circumferential groove formed on the outer periphery of the die main body portion via a step, and the scraper 30 is fitted into the concave circumferential groove through the ring gear 3.
a rotary drive body 37 that is provided on the inner peripheral surface of the ring gear 33 and drives the ring gear 33 around its axis; and a telescopic drive body 38 that allows the scraper 30 to be freely engaged and detached from the groove through the ring gear 33. An indirect extrusion press according to claim 1 of the utility model registration claim, characterized in that each of these is provided.