JPH0217682Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an apparatus for automatically exchanging dies in an extrusion press.

Prior Art As shown in Japanese Utility Model Application Publication No. 60-38612, a die slide that moves between a die exchange position and an extrusion work position, a die receiver that takes out a die from the die slide at the die exchange position, and a die slide A die exchange device is known that includes a die supply device that supplies dies to a die.

Problems that the invention aims to solve: Since the direction in which the die is taken out from the die slide and the direction in which the die is supplied are two orthogonal directions, the dies may interfere with each other unless they are operated in synchronization. The drive mechanism becomes complicated.

Means and operation for solving the problem A die slide that can reciprocate between an extrusion work position and a die exchange work position is provided with a die support part, and a sub-die slide having a first and second die support part is provided. It is provided so that it can freely reciprocate in the same direction as the die slide between a first position and a second position, and the die of the die support part of the die slide is moved between the second position of the sub-die slide.
The sub die slide includes a second die pushing mechanism that pushes the die to the die supporting part, and a first die pushing mechanism that pushes the die in the first die supporting part of the sub die slide to the die supporting part of the die slide. The die can be exchanged by reciprocating.

Embodiment FIG. 1 is an overall schematic perspective view, in which a die slide 2 is attached to the center of a platen 1 so as to be slidable along a guide rail 3.
A die support portion, for example, a substantially semicircular upward concave portion 4 and an upward semicircular concave portion 5 for taking out the pressed lees, are formed, and a die clamper 6 is provided along the upper surface of the die support portion. The die clamper 6 is slidably attached, and has a downward semicircular die holding recess 7 formed at the tip thereof, and a downward semicircular downward semicircular depression for taking out pressed lees in the middle part. A recessed portion 8 is formed to allow the die slide 2 and the die clamper 6 to
is reciprocated by the first and second cylinders 9 and 10 between the extrusion work position shown in FIG. 2 and the die exchange work position shown in FIG. 3, and when in the extrusion work position shown in FIG. The die A is pressed and fixed between the recess 4 and the die holding recess 7, and when the die is in the die changing position shown in FIG. It is set as.

One end wall 14 of a mounting frame 16 is fixed to the side of the platen 1, and includes a horizontal wall 11, one side vertical wall 12, another side vertical wall 13, one end wall 14, and the other end wall 15. A sub-die slide 18 is slidably attached to the sub-die slide 18 via a guide rail 17, and the sub-die slide 18 has first and second die support portions, for example, first and second recesses 1 that are substantially semicircular upward.
9 and 20 are formed, and a push-up rod 21 is provided at the bottom of the second recess 20 so as to be slidable in the vertical direction by a third cylinder 22, and a generally semicircular upwardly extending vertical wall 12 is provided on one side vertical wall 12. A notch recess 23 is formed, and on both sides of the center position of this notch recess 23 are first and second recesses.
The die pushing mechanism, for example, first and second die moving cylinders 24 and 25 are arranged facing each other in the horizontal direction, and the first die moving cylinder 24 is fixed to the other side vertical wall 13. , the second die moving cylinder 25 is fixed to a bracket 27 that is moved up and down by a fourth cylinder 26, and each piston rod 24a, 2
Die pressing pads 28 and 29 are attached to 5a, respectively.

A cylinder hole 30 is formed in the sub-die slide 18, as shown in FIG.
is fitted and inserted to constitute a moving cylinder 33, whose piston rod 31 is connected to the other side end wall 15, and in this moving cylinder 33, the sub die slide 18 is
The first recess 1 when the die is in the die changing position shown in Fig. 3.
9 is slid between a first position where it matches the recess 4 of the die slide 2 and a second position where the second recess 20 matches.

A motor 34 is mounted on the other vertical wall 13 of the mounting frame 16.
is fixedly installed, and an arm 35 is connected to its rotating shaft 34a, and a substantially semicircular receiving piece 36 is provided at the tip of the arm 35.
First and second pressing cylinders 38 and 39 are vertically fixed on the sides of the cylinder via a bracket 37, and first and second pressing pieces 4 are attached to the piston rods 38a and 39a.
0.41 is attached.

Next, the details of each part will be explained along with the operation.

As shown in FIG. 2, a new die A' to be replaced during extrusion work is placed in the first recess 19 of the sub-die slide 18, and the sub-die slide 18 is slid to the second position shown in FIG. and wait.

When the die slide 2 and die clamper 6 are moved to the die replacement work position shown in FIG. 3 by the first and second cylinders 9 and 10, the old die A fits into the second recess 20 of the sub-die slide 18. This state is shown in FIGS. 4 and 5, and the piston rod 25a of the second die moving cylinder 25 is extended and the old die A placed in the recess 4 is moved into the sub-die with the die pushing pad 29. It is pushed out and moved into the second recess 20 of the slide 18.

After this, while reducing the piston rod 25a,
The moving cylinder 33 sets the sub-die slide 18 to the first position, and the piston rod 24a of the first die moving cylinder 24 is extended to push and move the new die A' into the recess 4. This state is shown in FIG.

Then, by contracting the piston rod 24a, the first and second
The cylinders 9 and 10 move the die slide 2 and the die clamper 6 to the extrusion work position shown in FIG.

At this time, the sub die slide 18 slides to the second position, and the fourth cylinder 26 moves the second die moving cylinder 25 downward so that it does not interfere with the extrusion operation.

Also, die A has bolster A ₁ and die ring A ₂
To replace only die ring A ₂ , you can do the following.

First, only the new die ring A ₂ ′ is placed in the first recess 19 of the sub-die slide 18 and waited.
During die replacement work, the old die A is pushed out and moved into the second recess 20 of the sub-die slide 18 as shown in FIG. 8 in the same manner as described above.

As shown in FIG. 9, the sub-die slide 18 is moved to the first position, and as shown in FIGS. 39 piston rod 3
9a is extended to move the second pressing piece 41 downward, the second pressing piece 41 presses down the old bolster A ₁ , and the pushing rod 21 pushes up the old die ring A ₂ above the upper surface of the sub-die slide 18. to separate the two, and drive the motor 34 to connect the arm 3.
5 to support the receiving piece 36 in contact with the lower half of the old die ring _A2 . At this time, the receiving piece 36 is placed in the narrow protruding portion 36a so as not to interfere with the push-up rod 21.
is formed.

Then, the first pressing piece 4 is pressed by the first pressing cylinder 38.
0 is pressed against the old die ring A ₂ and firmly supported by the receiving piece 36, the piston rod 39a of the second pressing cylinder 39 is contracted, and the second pressing piece 41 is moved upward.

During the above-described operation, the first die moving cylinder 24 moves the die moving pad 28 to push and move the new die ring A ₂ ' into the recess 4.

After this, with the sub die slide 18 in the second position, as shown in FIGS. 11 and 12, only the old bolster A ₁ is moved to the die slide 2 while the old die ring A ₂ is still supported by the receiving piece 36. The old bolster A 1 is pushed and moved by the first die moving cylinder 24 so as to face the recess ₄ so as to press against the new die ring A ₂ ' already placed in the recess 4.

When the die ring A ₂ has been replaced and extrusion work is being performed, the sub-die slide 18 is placed in the first position and the old die ring A ₂ is placed in the second recess 20 by performing the opposite operation as described above. The old die ring A ₂ is removed again with the sub die slide 18 in the second position, and the new die ring A ₂ ' is placed in the first recess 19 to wait until the next replacement operation.

In this way, the die ring and bolster can be separated in the same device, so when replacing only the die ring or replacing the die that can also be used as the bolster,
Since there is no need to prepare multiple bolsters, there is a great economic effect.

Effects of the invention By moving the die slide 2 to the die exchange work position, moving the sub die slide 18 between the first position and the second position, and operating the first and second die pushing mechanisms. Because the die can be replaced,
Since there is no interference between the old die and the new die, the drive mechanism and control mechanism can be simplified.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a schematic perspective view of the whole, FIGS. 2 and 3 are front views of the extrusion work position and the die exchange work position, and FIG. 4 is a plan view of the mounting frame. Figure 5 is a longitudinal sectional view, Figure 6 is a partially cutaway front view, Figure 7 is a plan view during die replacement work, Figures 8-
FIG. 12 is an explanatory diagram of the operation when only the die ring is replaced. 2 is a die slide, 18 is a sub die slide.

Claims (1)

[Scope of utility model registration request] A die slide 2 having a die support part is provided so that the die support part can freely reciprocate between an extrusion work position, which is an extrusion position, and a die exchange work position, which is a die exchange position, and one side of the die slide 2 is provided. A sub-die slide 18 having first and second die support parts is placed in the first position and the second die position where the first die support part matches the die support part when the die slide 2 is in the die exchange work position. The second bearing part matches the die bearing part.
At the other side of the die slide 2, from the die support part of the die slide 2 to the second die support part of the sub-die slide 18. A second die pushing mechanism is provided that moves reciprocally toward the die slide 2, and moves reciprocally from the first die support portion of the sub die slide 18 to the die support portion of the die slide 2 at one side position of the sub die slide 18. A die changing device for an extrusion press, characterized in that a first die pushing mechanism is provided.