JPH0655339A - Billet scalping device and billet loading method in billet scalping device - Google Patents

Abstract

PURPOSE:To facilitate the centering of a billet, shorten the scalping cycle time and release the limit of the minimum billet length. CONSTITUTION:A platen 4 provided with a scalping die 9, and a cylinder frame 5 provided with a driving cylinder 12 are disposed opposedly. A crosshead 7 driven by the cylinder 12 is disposed between the platen 4 and the frame 5, and the crosshead 7 is provided with a pressure stem 14 having a stem head 17, opposedly to the die 9. In this billet loading method in a billet scalping device with the stem head 17 protruding and freely advancing/retreating independently by the cylinder 15, one billet loader 19 is disposed at a lower level between the die 9 and the pressure stem 14 in such a way as to be protruding/ retreating freely. A billet B on the loader 19 is received by the die 9 and the pressure stem 14 or the stem head 17, and the loader 19 is retreated/protruded so as not to allow the interference of the stem 14 and the crosshead 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a billet loading method and billet scalping device in a device for scalping (skinning) a billet for a metal extrusion press.

[0002]

2. Description of the Related Art Conventionally, as a sculpting device of this type, as shown in FIG. 9, a platen 32 having a sculpting die 31 and a cylinder frame 34 having a driving cylinder 33 for sculpting are arranged so as to face each other. And a cylinder frame 34, a cross head 35 is reciprocally driven by the cylinder 33, a pressure stem 37 having a stem head 36 is provided on the cross head 35, and the stem head 36 projects by the cylinder 37. It is known that it can be independently inserted into and removed from the die hole, and the billet is moved toward the die 31 via a pressure stem 37 to perform scalping (Japanese Utility Model Publication No. 60-15616). reference).

In this apparatus, two billet loaders 38 and 39 are arranged between the die 31 and the crosshead 35 so that they can be inserted and withdrawn in parallel from the side. Therefore, when loading a long billet, the billet is set at the scalping center using the two billet loaders 38 and 39, the cross head 35 is moved forward, and the stem head 36 and the die 31 clamp the billet. The loader on the crosshead side retracts to a position where it does not interfere with the crosshead, and then advances the crosshead 35 to start scalping of the billet.

The crosshead 35 stops when approaching the die-side loader 39, and when the die-side loader 39 retracts to a position where it does not interfere with the die 31, the crosshead 35 advances again to continue scalping. Further, when scalping a short billet, the billet is loaded by using one billet loader 39 on the side of the scalping die 31, and after the scalping is started, the crosshead 35 causes the scalping die 31 to move.
When the billet is approached to, the billet is clamped by the die 31 and the stem head 36, and the billet loader 39 retracts.

[0005]

By the way, in the above-mentioned prior art, in the case of a long billet, two billet loaders 38, 3 are used.
Since 9 is used, the scalping cycle time is lengthened by the time when the forward movement of the crosshead 35 stops once when the billet loader 38,39 retracts, and the two billet loaders 38,3
Since one billet is placed on top of 9, the centering is troublesome and it takes a lot of time, and there are problems such as poor workability and efficiency.

In the case of a short billet, the crosshead
Stem head before 35 hits billet loader 39 on die 31 side
There is a problem that the billet length is sufficient to sandwich the billet between the 36 and the scalping die 31, and the minimum billet length is limited. The present invention has been made in view of the above situation, and an object thereof is to facilitate the centering of the billet, reduce the scalping cycle time, and release the restriction of the minimum billet length, and save space. To provide a billet loading method and a billet scalping device in a billet scalping device.

[0007]

In order to achieve the above object, the present invention takes the following technical means. That is, according to the present invention, a platen having a scalping die and a cylinder frame having a scalping drive cylinder are arranged to face each other, and a crosshead is disposed between the platen and the cylinder frame and reciprocally driven by the cylinder. ,
A billet loading method in a scalping device in which a cross-head is provided with a pressure stem having a stem head, and a protruding cylinder is provided that allows the stem head to move forward and backward independently of the die,
A billet loader is arranged so as to be retractable below the scalping die and the pressure stem, and the billet on the loader is received by being sandwiched by the scalping die and the pressure stem or the stem head thereof. It is characterized by leaving the loader.

Further, according to the present invention, a platen having a scalping die and a cinder frame having a scalping drive cylinder are arranged to face each other, and a crosshead is arranged between the platen and the cylinder frame to reciprocate by the cylinder. In a scalping device that is driven and provided with a pressure stem having a stem head in the crosshead, and a protruding cylinder that allows the stem head to advance and retreat independently with respect to the die, One of the features is that one billet loader is disposed below the space between the stems so as to be able to move up and down, and the billet is fed upward from below.

Further, according to the present invention, the chip discharge chute, which is located below the die and the pressure stem, is retracted to the standby position when the billet loader is raised, and is moved to the tip position when the billet loader is lowered. It is characterized in that it is arranged so as to advance to the receiving position.

[0010]

According to the present invention, in the case of a long billet, the billet on the billet loader is set between the scalping die and the pressure stem and is pressed by the scalping cylinder to be sandwiched between the die and the stem. At the same time, scalping is started, the billet loader exits, waits at a position where it does not interfere with the crosshead, the chip discharge chute advances, and scalping continues.

In the case of a short billet, when the billet on the billet loader is located between the scalping die and the pressure stem, the stem head projects and is advanced by the cylinder, and when the billet is clamped by the die and the stem head, The billet loader retreats, the billet is projected, and the pressure stem is moved forward together with the cross head while being pressed by the cylinder. The billet is clamped by the pressure stem and the die, and at the same time, the chip discharge chute advances and starts scalping. The stem head relatively retracts into the pressure stem as the pressure stem advances.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The drawings show an example of a billet scalping device for an extrusion press for carrying out the method of the present invention.
The platen 4 and the cylinder frame 5 are opposed to each other via the tie rod 6, and both 4,5 are connected by a tie rod 6, and a crosshead 7 is reciprocally attached to the tie rod 6 so as to face the platen 4. .

A scalping die 9 is attached to the platen 4 via a die holder 8, and a stripper 10 of a scalping chip surrounding the die 9 is mounted on a cylinder 11
It is provided so that it can move back and forth. Two scalping cylinders 12 are attached to the cylinder frame 5 by tie rods.
The piston rod 13 is arranged in parallel with 6 so as to project toward the crosshead 7, and the outer end of the piston rod 13 is connected to the crosshead 7 to drive the crosshead 7 forward and backward. .

A hollow pressure stem 14 is provided at the center of the crosshead 7 so as to be opposed to the die 9 side, and on the opposite side of the stem 14 concentrically with the stem 14, after scalping is completed. A protruding cylinder 15 for protruding the billet is attached, and a sliding rod 16 connected to a piston rod 15A of the protruding cylinder 15 slidably penetrates inside the pressure stem 14, and the front end of the rod 16 is connected to the pressure stem 14 Is connected to a stem head 17 that is a separate body from the stem 14 located at the front end.

A pit 18 is provided in the floor 1 on the side of the gantry 2, a billet loader 19 and a fixed chip discharge chute 20.
A and a movable chip discharge chute 20B are provided.
The billet loader 19 is provided so as to be vertically movable along a vertical guide 21 provided on the side wall of the pit 18, and is provided with a hydraulic cylinder 22.
The roller block 23 supporting the billet B is provided at the upper end of the roller block 23.

As shown in FIGS. 5 and 6, the roller block 23 comprises a plurality of rollers 25 mounted on a block base 24 via a shaft 26 in an inclined and rotatable manner, as shown in FIG. In addition, since the mounting hole 27 on the loader top plate 19A is a long hole, the position of which can be adjusted by a bolt 28, and the adjustment by a pull bolt 29 and a push bolt 30, the centering of the billet B can be adjusted. Can be done easily.

The fixed chip discharge chute 20A is fixed in a pit 18 directly below the die 9 at a position where it does not hinder the lifting and lowering of the billet loader 19, and the movable chip discharge chute 20B is attached to the pedestal 3. The driving cylinder 20C is arranged so as to be able to move back and forth in the horizontal direction and not to interfere with the billet loader 19.
At the time of ascent of 19, the retracted to the standby position shown by the solid line in FIG. 1, after descending of the billet loader 19, it is advanced by the cylinder 20C and positioned on the billet loader 19 as shown by the chain double-dashed line in FIG. It is designed to be connected to the discharge chute 20A.

When the scalping of the billet B is completed, the movable chip discharge chute 20B is retracted to the standby position by the cylinder 20C. In the apparatus of the above embodiment,
When loading the long billet B, as shown in FIG. 1, the pressure stem 14 and the movable chip discharge chute 20B are positioned at the backward limit, and the billet loader 19 is charged with the billet B.
Put. Billet B placed on roller block 23
Are automatically centered by the roller 25 as shown in FIG. Therefore, the hydraulic cylinder 22 is operated to raise the billet loader 19, and the centering and setting is performed on the scalping die 9 at the position shown by the chain double-dashed line in FIG.

Next, the scalping cylinder 12 is operated to advance the pressure stem 14 together with the crosshead 7, the billet B is clamped by the scalping die 9 and the pressure stem 14, and at the same time the billet loader 19 descends and retreats to cross the head 7. The movable chip discharge chute 20B advances onto the billet loader 19 to start scalping, waiting at a position where it does not interfere with. Therefore, after starting scalping, the loader
Even if 19 exits, crosshead 7 does not stop and scalping is performed. And when scalping ends,
Movable chip discharge chute 20B is in the standby position in cylinder 20C.
To retreat.

Next, when loading the short billet B, first, the movable chip discharge chute 20B is retracted,
The billet B is placed on the loader 19 and lifted to perform the centering with respect to the scalping die 9, and the scalping cylinder 12 advances the crosshead 7 to the extent that the pressure stem 14 does not contact the billet loader 19 and then stops. After that, only the stem head 17 is advanced by the ejecting cylinder 15, and as shown in FIG.
And the stem head 17 clamps billet B.

Therefore, as shown in FIG.
After operating 22 to lower the billet loader 19 to stand by at a position where it does not interfere with the crosshead 7 and the pressure stem 14, move the movable chip discharge chute 20B and operate the scalping cylinder 12 to move the crosshead 7 Move forward,
When the front end surface of the pressure stem 14 contacts the billet B, scalping is started at the same time. At this time, the stem head 17 relatively retracts while the crosshead 7 is advancing.

As described above, since the billet loader 19 descends after the short billet B is sandwiched by the scalping die 9 and the stem head 17, the length of the short billet B is not limited. The present invention is not limited to the above-mentioned embodiment, and can be adopted, for example, in the one in which the billet loader 19 horizontally moves in the front-back direction as in the conventional case, and the design can be appropriately changed.

[0023]

As described above, according to the present invention, the platen having the scalping die and the cylinder frame having the scalping drive cylinder are arranged to face each other, and the crosshead is disposed between the platen and the cylinder frame. Billet loading method in a scalping device in which a pressure stem having a stem head is provided on a cross head and a protruding cylinder is provided to allow the stem head to move forward and backward independently of the die. A billet loader is disposed below the scalping die and the pressure stem so as to be retractable, and the billet on the loader is held by the scalping die and the pressure stem or its stem head. It is characterized in that the loader is removed and the loader is withdrawn. Since a billet loader can be used, the equipment can be simplified and the facility cost can be reduced, and the centering is easy, and there is no temporary suspension of scalping due to the withdrawal of the billet loader, which shortens the cycle time and improves efficiency and workability. In addition, the minimum billet length is not limited, and the projecting cylinder and the stem head can be effectively used.

Further, according to the present invention, a platen having a scalping die and a cinder frame having a scalping drive cylinder are arranged to face each other, and a crosshead is arranged between the platen and the cylinder frame to reciprocate by the cylinder. In a scalping device that is driven and provided with a pressure stem having a stem head in the crosshead, and a protruding cylinder that allows the stem head to advance and retreat independently with respect to the die, One billet loader located below the space between the stems is arranged so that it can be raised and lowered, and the billet is raised and supplied from below, so the entire device is compact and space-saving. It is possible to reduce the equipment cost, improve workability and efficiency.

Further, according to the present invention, located below the die and the pressure stem, the chip discharge chute is retracted to the standby position when the billet loader is raised, and the chip discharge chute is lowered when the billet loader is lowered. Since it is characterized in that it is arranged so as to advance to the receiving position, it enables the vertical movement of the billet loader without interfering,
The chip ejection function can be secured.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is an enlarged view of the left side surface of the billet loader.

5 is an enlarged partial cutaway view of a portion A of FIG.

FIG. 6 is a side view showing roller block adjusting means of the billet loader.

FIG. 7 is a diagram illustrating a loading state of a short billet.

FIG. 8 is an explanatory view of a scalping start state of a short billet.

FIG. 9 is a plan view showing a conventional example.

[Explanation of symbols]

 4 Platen 5 Cylinder Frame 7 Crosshead 9 Sculping Die 12 Scalping Drive Cylinder 14 Pressurizing Stem 15 Overhanging Cylinder 17 Stem Head 19 Billet Loader 20B Movable Tip Discharge Chute

Claims (3)

[Claims] 1. A platen having a scalping die,
A cylinder frame provided with a scalping drive cylinder is disposed so as to face each other, a crosshead is provided between the platen and the cylinder frame, and reciprocally driven by the cylinder, and a pressure stem having a stem head is provided on the crosshead. A billet loading method in a scalping device provided with a projecting cylinder that allows the stem head to move forward and backward independently of the die, wherein a billet loader is provided between the scalping die and the pressure stem. A billet loading method in a billot scalping device, characterized in that the billet on the loader is retracted, and the billet on the loader is sandwiched by the scalping die and the pressure stem or its stem head to receive the loader and retract. 2. A platen having a scalping die,
A cinder frame provided with a scalping drive cylinder is disposed so as to face each other, a crosshead is disposed between the platen and the cylinder frame, and is reciprocally driven by the cylinder, and the crosshead is provided with a pressure stem having a stem head. In addition, in a scalping device provided with a protruding cylinder that allows the stem head to independently advance and retract with respect to the die, a billet loader can be moved up and down located below the scalping die and the pressure stem. The billet scalping device is characterized in that the billet is raised and supplied from below. 3. A chip discharge chute located below the die and the pressure stem is retracted to a standby position when the billet loader is raised, and is advanced to a chip receiving position when the billet loader is lowered. The billet scalping device according to claim 2, wherein the billet scalping device is arranged as follows.