JPH0815617B2 - Operating method of extrusion press and its equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an operating method of an extrusion press apparatus and an extrusion press apparatus improved so as to increase the operating efficiency of the extrusion press apparatus.

[Prior Art] In a conventional extrusion press, a die slide cylinder,
The die slides and die blocks are arranged in a line in this order. The die slide is fixed to the tip of the piston rod that is engaged with the die slide cylinder, while the die slide and die block are connected by an easy-to-disconnect hook. When oil is supplied, the die block is moved from the die exchange position to the billet extrusion center position.

Next, the container cylinder is operated to bring the container into contact with the die while being pressed against the die, and the billet on the billet loader is loaded into the container by the stem. Then, the stem is further advanced, and the billet is extruded from the die as an extruded product having a predetermined shape. This stem is normally strongly advanced by a hydraulic ram.

After extruding the billet, retract the container slightly, separate the product part and the remaining billet in the container (called a clogged billet) with a cutting device, discharge the clogged billet, and then Load the billet.

By the way, in recent years, there has been an increasing tendency to produce a wide variety of products in small quantities, and the dies may be frequently replaced to press-form many types of products.

Conventionally, when the die is exchanged after the extrusion of one cycle is completed and the extrusion of the next cycle is performed, the die is exchanged, and then the container is brought into contact with the die to load the billet.

[Problems to be Solved by the Invention] As described above, in the conventional extrusion press device and its operating method, when the die is replaced after the extrusion press of one cycle and the extrusion press of the next cycle is performed, the die slide cylinder is Since it is integrally engaged with the die block through the die slide, after the billet is extruded, the die block is temporarily moved to the die exchange position and the die is exchanged.
Move the die block to the billet extrusion position again,
Since the container is moved forward, the die is contacted, and the billet is loaded after setting, the time between the extrusion press molding of one cycle and the extrusion press molding of the next cycle is long (usually about 30 seconds), The operating efficiency of the extrusion press was low.

[Means for Solving the Problems] In order to solve such problems, the present invention provides
When the position of the blind plate that blocks the take-out holes such as the damii block provided on the die slide is in the center of the extrusion press, the billet is loaded into the container in parallel with the die exchange operation.
In addition to the method of performing a series of operations such as upset and barp, the die slide and the die block in which the die block engaging member is disposed on the end surface on the die slide side so as to be integrally movable with the die block are the center of the extrusion press. One end of a die block sliding member which is movably provided in the intersecting horizontal direction and is slidable in a groove provided in the side end surface of the die block engaging member on the die slide side in the moving direction of the die slide. And the die block is movably provided between the position where the die block engaging member contacts the die slide and the die exchange position, and the container contact surface of the die slide has no hole.

[Operation] In the invention according to claim 1, when the position of the blind plate that closes the take-out hole of the damy block or the like provided in the die slide is at the center of the extrusion press, apart from the die exchange operation, the container is moved to the die. Operations such as contact, billet loading into container, upset and burp proceed in parallel, so idle time is significantly reduced.

In the invention according to claim 2, the die block engaged with the die block cylinder is exchanged while the container is in contact with the die, and the upset and the barp operations are performed. After the die exchange, the die block is exchanged. Since the die block can be moved to the center position of the extrusion press within a short time by using the die slide cylinder by completing the burp operation, the idle time can be shortened.

Embodiments Embodiments will be described below with reference to the drawings.

1 to 4 show one embodiment of an extrusion press device according to the present invention, FIG. 1 is a plan view of the essential parts of the extrusion press device, and FIG. 2 (a) is along the extrusion direction of FIG. 2 (b) is a sectional view taken along the extrusion direction when the container and the die are separated from each other, and FIG. 3 (a) is a sectional view taken when the die slide is in the billet extrusion position. (B)
III-III cross-sectional view of FIG. 3, FIG. 3 (b) is III-III of FIG. 2 (b) when the die block is in the billet extrusion position.
A cross-sectional view, FIG. 4 (a), shows a pressing operation procedure and required time of the present invention, and FIG. 4 (b) shows a conventional pressing operation procedure and required time.

Reference numeral 10 is a machine base, and an end platen 12 is fixed to one end side, a cylinder mounting block 14 is installed to the other end side, and an extrusion cylinder 16 is fixed to the cylinder mounting block 14. The end platen 12 is an extrusion cylinder 16
The lower part on the side facing to is a die supporting portion 20 on which a die slide 22 is slidably installed in the machine width direction. A die 24 is held on the die slide 22.

The die slide 22 is moved in the machine width direction by a die slide cylinder 25 provided on the side of the end platen 12. Further, it is possible to reciprocate between the extrusion operation position located on the back surface of the end platen 12 (the surface on the extrusion cylinder 16 side) and the die replacement position pulled out from the back surface of the end platen 12. Conventionally, the die slide 22 has a hole for taking out the jammed billet and the Damii block 94 cut by the cutting device 28, but in this embodiment, the blind plate 22a is attached with a bolt or the like for the purpose of closing the hole. It is fixed so that it does not get in the way of the upset. In addition, the die slide cylinder of die slide 22
A die block cylinder 29 for moving the die block 18 is fixedly provided on the side surface of the attachment side 26 with the die slide cylinder 25 parallel to the axis line and separated from each other. On the other hand, a die block engaging member 5 is connected to the die block 18 by a hook 64a as shown in FIG. 3, and further, a die block sliding member 6 provided adjacent to the die block engaging member 5 is provided. One end is fixed to a side surface of the die block engaging member 5, and the other end is fixed to a tip end portion of a piston rod 29a which is disposed so as to slidably engage with the die block cylinder 29. The working pressure oil supplied to the cylinder 29 for use allows the back surface of the die slide 22 (the surface on the end platen 12 side) to be horizontally slid while being fitted horizontally along the long and narrow engraved surface. ing.

A bracket 26 is fixedly installed on the upper portion of the end platen 12 facing the extrusion cylinder 16.
Is provided with a cutting device 28. The cutting device 28 is for cutting a discard of a die and a product portion, which will be described later, and includes a cutting blade 32 that is vertically stroked by a cylinder 30.

The end platen 12 and the cylinder mounting block 14 are connected by a column 34. A container guide (not shown) is provided on the end platen 12 side of the column 34, and a container 38 is installed along the container guide so as to be movable in the extrusion direction.

A container cylinder (container moving cylinder) 40 is provided on the end platen 12 to move the container 38 in the extrusion direction or in the opposite direction. The tip of the piston rod 42 of the container cylinder 40 is the container holder
38A, and by moving the piston rod 42 of the container cylinder 40 forward and backward, the container holder 38A can be moved in the left-right direction in FIGS. The container 38 mounted in the container holder 38A has a billet loading hole 44, and a container sleeve 46 is loaded in the billet loading hole 44.

On the extrusion cylinder 16 side of the container 38, the billet loader 52
Is provided. The billet loader 52 can be retracted from the stem advance / retreat area by a drive device (not shown).

The extrusion cylinder 16 comprises a ram 58, which
A stem 60 is attached to the tip of the via a head plate 56 and an attachment member 54. An oil reservoir tank 62 is provided on the upper side of the cylinder 16, and the oil reservoir tank 62 and the hydraulic oil inlet 64 at the rear end of the cylinder 16 are connected by a prefill valve 66. A butterfly valve 68 is installed on the prefill valve 66.
The inlet 70 is provided with a valve 70 for opening and closing the inlet 64. The valve 70 is opened and closed by a cylinder 72.

Side cylinders 76, 78 are provided on the side of the cylinder 16, and their piston rods 80, 82 are fixed to the head plate 56.

A supply pipe (not shown in FIGS. 1 and 2) for operating hydraulic pressure is connected to the cylinders 16, 25, 29, 40, 76, 78.

Next, a method of operating the extrusion press device configured as described above will be described.

In FIG. 3A, the container 38 is the die slide 22.
And the piston rods 25a, 29a of the die slide cylinder 25 and the die block cylinder 29 are in an extended state, the die slide 22 is at the billet extrusion position, and the die block 18 is at the die replacement position. First, when operating pressure oil is supplied to the piston rod 29a side of the die block cylinder 29 from this state, both the die block 18 and the die block engaging member 5 are die slides.
The die slide 22 and the die block engaging member 5 finally come into contact with each other. In the present invention, the die block engaging member 5 and the die block sliding member 6 are referred to as connecting means.

Next, when operating pressure oil is supplied to the piston head 25a side of the die slide cylinder 25 from the above state, the die slide 22, the die block sliding member 6 and the die block engaging member 5 are all on the die slide cylinder 25 side. Finally, as shown in FIG. 3B, when the die block 18 reaches the billet extrusion center position, the supply of the working pressure oil to the die slide cylinder 25 is stopped.

Thus, thereafter, the container cylinder 40 is operated to bring the container 38 into contact with the die 24, the ram 58 is moved forward, and the billet 96 is pushed by the stem 60 to perform extrusion molding.

Next, in the next cycle, during the extrusion of the previous cycle, the billet 96 for the next cycle (the one for which the length measurement has been completed) is received by the billet loader 52 and partially lifted to a position where the container 38 and the main ram 58 should interfere with each other. The billet loader 52 is raised to the center of the press. Then, the ram 58 of the extrusion cylinder 16 is advanced to advance the stem 60, and the billet 96 is loaded into the billet loading hole 44 of the container 38. This lamb
When advancing 58, valve 70 is opened and ram 58 is advanced by side cylinders 76, 78. As the ram 58 advances, a large amount of hydraulic oil flows from the oil reservoir tank 62 into the extrusion cylinder 16 through the prefill valve 66.

Next, insert the billet loader 52 into the container 38 and the extrusion cylinder.
Withdraw from the position between 16 and. The container 38 has been moved in advance by the container cylinder 40 so as to come into close contact (contact) with the die 24. After the charging of the billet 96 is completed in this way, the ram 58 is further advanced and the billet 96 is strongly pressed and pushed out from the die 24. When the ram 58 is strongly advanced, the valve 70 is closed and, instead, the working hydraulic pressure is supplied into the extrusion cylinder 16 via another valve (not shown).

After the extrusion of the billet 96 is completed, the container cylinder 40 is operated to move the container 38 so as to separate from the die 24, and the main ram 58 is retracted from the position where the jammed billet is separated from the container 38. Next, the cylinder 30 of the cutting device 28 is operated and the cutting blade 32 is lowered to cut the product from the pressed billet. After the cutting is completed, the cutting blade 32 is retracted by the cylinder 30 to the standby state shown in FIG. After that, the ram 58 is retracted to a predetermined standby position. At this time, the container 38 shifts from the retracted state to the next extrusion press step. In addition, rum 58
Is retracted by the side cylinders 76 and 78.

When the ram 58 is retracted by the side cylinders 76, 78, the residual extruding pressure is first released by a pressure release dedicated valve (not shown), and then the working oil in the extrusion cylinder 16 is discharged from the prefill valve 66 dedicated for oil discharge to the oil reservoir tank. Returned to 62.

Next, the idle time reduction in the present invention will be described with reference to FIG.

Conventionally, the die change time (the die 24 placed at a normal position on the die block 18 is now pushed out from the extrusion position of the billet 96 again with the die exchange of the next cycle, as in the previous cycle. It takes 15 seconds until the die block 18 is returned to the center), and the first half cycle time of the press (the billet 96 is placed on the billet loader 52 as the container 38 starts to move forward and the ram 58 and the container When the ram 58 moves forward, the valve 70 is opened, and then the ram 58 is moved forward by the side cylinders 76 and 78. As the ram 58 moves forward, a large amount of hydraulic oil is discharged from the oil reservoir tank 62. Flows into the extrusion cylinder 16 through the prefill valve 66, and closes the prefill valve 66 as needed), which is 8 seconds longer than the time of 7 seconds in the die changer. And it takes,
DAICH ENGAGED DEAD TIME (After changing the dies, set Die 24 to the billet extrusion position, then
Until the 38 is brought into contact with the die 24, the container sealing operation as the next operation cannot be started, and the time during this is a dead time) is 8 seconds.

Thereafter, operating pressure oil is further supplied to the container cylinder 40, and the container 38 is strongly pressed against the die 24 side so as not to cause burrs when the billet is extruded from between the container 38 and the die 24 to perform container sealing (0.5 seconds).

Next, after the upset (the container 38 is brought into contact with the die 24, the billet 96 is loaded into the container 38 by advancing the ram 58 and the stem 60 is strongly pressed to fill the container 38), and after the barp (the billet 96 is loaded into the container 38). After pushing it into the die 24 by pushing it strongly with the stem 60 after loading it, the air pushed between the container 38, the die 24 and the billet 96 is reversed by the advance of the ram 58.
In order to carry out the phenomenon (pushing in), it takes 7 seconds until the container 38 is slightly separated from the die 24 to evacuate the air, and then the container cylinder 40 again brings the container 38 into contact with the die 24. Further, when the working pressure oil is then supplied to the container cylinder 40, the container 38 moves into the die 24.
It makes a strong contact with and is sealed (0.5 seconds).

As shown in Fig. 4 (b), in the conventional method, the billet is officially formed from the first half cycle of the press or from the start of the die punch.
It takes 23 seconds to push out 96.

On the other hand, in the present embodiment shown in FIG. 4 (a), since the die slide 22 is equipped with a blind plate, the die slide
By setting 22 to the center position of the billet extrusion, the aforementioned first half cycle of pressing (7 seconds), container sealing (0.5 seconds), upset and barp operations are continuously performed in parallel with the die change operation.
Here, the above-mentioned Daichienji operation of the present embodiment,
Now, the die block 18 is at the extrusion center of the billet 96, and in order to perform the die exchange for the next cycle, first, the die slide cylinder 25 is operated to move the die slide 22 to the billet extrusion center, and then the die slide. The die block cylinder 29 attached to 22 is actuated to move the die block 18 to the die exchange position for die exchange.

After exchanging the dies, the die block cylinder 29 is operated to move the die block engaging member 5 engaged with the die block 18 to the expected position where the die block 22 comes into contact with the die block 22 (now the die slide 22 is at the billet extrusion position). The state where the die block engaging member 5 engaged with the die block 18 is in contact with the die slide 22 is called an expected position). In this way, when the die block 18 comes to the expected position, the die chirping (12 seconds) shown in FIG. 4 (a) is completed for the time being, but since the container 38 is in a container sealed state in which it is strongly abutted against the die 24, the burp operation Until the container 38 is separated from the die 24 after completion of the process, the die block 18 cannot be moved from the current expected position to the billet pushing position by the operation of the die slide cylinder 25.

After the completion of the burp operation, the die-change return (moving from the expected position of the die block to the extrusion center position of the billet) is completed in 3 seconds, and the container cylinder 40 is actuated to strongly abut the container 38 on the die 24 to seal it.

As described above, in this embodiment, 18 seconds are required from the start of the first press cycle or from the start of die change to the official push-out operation of the billet, and in this embodiment, the idle time is shortened by 5 seconds as compared with the conventional example. .

[Effects of the Invention] As is apparent from the above description, according to the present invention, a blind plate is attached to a hole opened for taking out a billet or dami block on a die slide with bolts or the like, and the back surface or the inside is By engraving, and further by attaching a die block cylinder to one end of the die slide and connecting it to the die block through a connecting means, the container is kept close to the die side, and the container seal is attached even after the billet is loaded into the container. Since the upset and barb operations can be performed independently of the die change operation, the dead time due to the waiting time is reduced and the idle time is significantly shortened. As a result, the operating efficiency of the extrusion press device is improved.

[Brief description of drawings]

1 to 4 show an extrusion press device 1 according to the present invention.
Fig. 1 shows an embodiment, and Fig. 1 is a plan view of a main part of an extrusion press machine,
2 (a) is a sectional view taken along the extrusion direction of FIG. 1, FIG. 2 (b) is a sectional view taken along the extrusion direction when the container and the die are separated from each other, and FIG. 3 (a). ) Is shown in Fig. 2 (b) when the die slide is in the billet extrusion position.
III-III transverse sectional view, FIG. 3 (b) is III-III of FIG. 2 (b) when the die block is at the position where the billet is extruded.
A cross-sectional view, FIG. 4 (a), shows a pressing operation procedure and required time of the present invention, and FIG. 4 (b) shows a conventional pressing operation means and required time. 5 ... die block engagement member, 6 ... die block sliding member, 10 ... machine base, 12 ... end platen, 18 ... die block, 22 ... die slide, 24 ... die, 25 ... die slide cylinder, 29 ... die Block cylinder, 38 ...
Container, 40 ... Container cylinder, 58 ... Ram, 60 ... Stem, 76,78 ... Side cylinder, 80,82 ... Piston rod,
96 ... Billet.

Claims (2)

[Claims] 1. When the position of a blind plate that has blocked a take-out hole such as a dami block provided on a die slide is at the center of an extrusion press, the billet is loaded into a container, upset and burp, etc., in parallel with the die exchange operation. A method for operating an extrusion press, which is characterized by performing a series of the above operations. 2. A die slide and a die block having a die block engaging member disposed on an end surface of the die slide side so as to be integrally movable with the die block, the die block being provided movably in a horizontal direction intersecting the center of the extrusion press. One end portion of a die block sliding member that is slidable in a groove provided in the moving direction of the die slide is fixed to a side end surface portion of the die block engaging member on the die slide side, and the die block is attached to the die block engaging member. An extrusion press device characterized in that the mating member is movably provided between a position in contact with the die slide and a die exchange position, and that the container contact surface portion of the die slide is not provided with a hole.