JPH0763754B2 - Method of operating extrusion press device and extrusion press device - Google Patents

Description

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

[Prior Art] When extrusion pressing is performed by an extrusion press device, a container is pressed against a die, and the billet on a billet loader is loaded into the container by a 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
In the usual case, it is strongly advanced by a hydraulic ram.

After pushing out the billet, retract the container slightly,
A cutting device separates the product part from the remaining billet in the container (called a discard), discharges the discard, and then loads a new 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 exchanged after the extrusion press of one cycle and the extrusion press of the next cycle is performed, the exchange work of the die is completed. After confirmation, there is a long time between the extrusion press molding of one cycle and the extrusion press molding of the next cycle (usually about 30 seconds) in order to advance the container, contact the die, and load the billet. The operating efficiency of the extrusion press was low.

[Means for Solving the Problem] The method for operating the extrusion press apparatus according to claim (1) is one cycle of supplying a billet from a billet loader to a container and extruding the billet from a die by a stem biased by a ram. In an operating method of an extrusion press apparatus in which a die is replaced and an extrusion press operation of a next cycle is performed after performing an extrusion press operation, a billet is billeted while performing a die exchange operation between the one cycle and the next cycle. It is characterized in that an operation of supplying the container from the loader and an operation of making the container stand by immediately before the contact position with the die are performed, and after the replacement of the dice, the container is brought into contact with the die to perform an extruding operation. .

The extrusion press device according to claim (2) is a die holding device, a die that is detachable from the die holding device, a container that can be moved toward and away from the die by a driving device, and a side of the container opposite to the die. In an extrusion press device having a billet loader arranged in the above and a pressing device having a stem for pressing the billet, a stopper mechanism for stopping the container at a position immediately before the contact position of the die is provided. It is a thing.

[Operation] In the operating method of the extrusion press device according to claim (1), after completion of the extrusion press for one cycle, the work of exchanging the dies and the loading of the billet into the container are performed in parallel. Then, the container is made to stand by immediately before the position of contact with the die before the completion of the die exchange. Therefore, after the die exchange is completed, the extrusion press of the next cycle can be started by slightly advancing the container and bringing the container into contact with the die. Therefore, the operation stop time (idle time) of the extrusion press device when the die is replaced is extremely short, and the operation efficiency of the extrusion press device is improved.

In the extrusion press device according to claim (2), the container can be stopped immediately before the contact position with the die, so that the operating method of the extrusion press device can be reliably executed.

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

1 is a cross-sectional view taken along the extrusion direction of an extrusion press device according to an embodiment of the present invention (a cross-sectional view taken along line I-I in FIG. 2), and FIG. 2 is II-II in FIG. Cross-sectional view along the line (however,
Only the two-dot chain line shows the container. )
Is.

Reference numeral 10 is a machine base, and an end platen is provided at one end
12 is fixed, a cylinder mounting block 14 is installed on the other end side, and an extrusion cylinder 16 is fixed to the cylinder mounting block 14. The lower end of the end platen 12 facing the extrusion cylinder 16 projects as a guide rail supporting portion 18, and a guide rail 20 is provided on the guide rail supporting portion 18.
Are extended in the horizontal direction orthogonal to the extrusion direction (hereinafter, the horizontal direction orthogonal to the extrusion direction may be referred to as the machine width direction). Die slide on the guide rail 20
22 is installed slidably in the machine width direction, and the guide rail 20 and the ridges 20a and the ridges 22a provided on the die slide 22 are engaged with each other to move the die slide 22 in the machine width direction. I'm guiding you. The die slide 22 is provided with a die mounting portion 22b having a U-shape when viewed from the extrusion cylinder 16 side, and the die 24 is mounted on the die slide 22 so as to be dropped into the die mounting portion 22b from above. ing. In this embodiment, the die slide 22 and the end platen 12 form a die holding device.

A mounting block 26 is fixedly provided on the upper side of the end platen 12 facing the extrusion cylinder 16.
A cutting device 28 is provided at 26. The cutting device 28 is
The cutting blade 32 is provided for cutting a discard in a container and an extruded product portion, which will be described later, and includes a cutting blade 32 that is vertically stroked by a cylinder 30. The cylinder 30 is mounted on a cylinder mounting base 36 provided on the upper part of the pillar 34, and the piston rod 30a of the cylinder 30 can be stroked downward. A connecting block 38 is provided at the lower end of the piston rod 30a, and the cutting blade 32 is attached to the lower end of a rod 40 fixed to the lower surface side of the connecting block 38.

A key member 42 is fixed to the lower surface of the mounting block 26, and the key member 42 is slidably engaged with a groove 22c recessed in the upper surface of the die slide 22. These key members 42
Both the groove 22c and the groove 22c extend in the machine width direction.

The end platen 12 and the cylinder mounting block 14 are connected by a column 44. A container guide 46 is fitted on the end platen 12 side of the column 44,
A container 48 is installed along the container guide 46 so as to be movable in the extrusion direction. As shown in FIG. 2, the container 48 includes a pair of left and right upper arm portions 48a and a pair of left and right lower arm portions 48b. The upper arm portion 48a is a guide rail provided on the lower surface of the upper container guide 46.
Engaged with 46a. An L-shaped block 48c is fixed to the lower arm portion 48b, and the L-shaped block 48c is engaged with the upper edge of the lower container guide 46. Code 48
L is a linear scale for indicating the moving position of the container 48 from the die 24.

A container moving cylinder 50 is provided on the surface of the end platen 12 opposite to the extrusion cylinder 16 for moving the container 48 in the extrusion direction. Cylinder for container movement
A piston rod 50 a of 50 extends through the end platen 12, and its tip is connected to the container 48. Therefore, by projecting and retracting the piston rod of the container moving cylinder 50, the container 48 can be moved in the left-right direction in FIG. The container 48 has a billet loading hole 49, and the peripheral surface of the billet loading hole 49 is constituted by a container sleeve 49a fitted into the container 48.

A billet loader 52 is provided on the extrusion cylinder 16 side of the container 48. The billet loader 52 has a billet mounting surface 52a on its upper surface. The lower end of the billet loader 52 is supported by a supporting member 54 and a rotating device 56, and the billet loader 52 is tiltably installed so that the upper end of the billet loader 52 swings in a direction perpendicular to the plane of FIG.

The extrusion cylinder 16 has a ram 58, and a stem 60 is attached to the tip of the ram 58.

A stopper rod 62 is provided to stop the container 48 at a position immediately before the contact position with the die 24.
The stopper rod 62 is configured to be stroked in the left-right direction in FIG. 1 by a stopper rod cylinder 63 fixed to the surface of the end platen 12 opposite to the pushing cylinder 16, and the stopper rod 62 is moved forward. When the stopper rod 62 is pushed to the limit, the tip surface 62a of the stopper rod 62 is
It is in a state of slightly protruding (for example, about 1 to 10 mm) from the contact surface (contact surface) 24a of the container 4 with the container 48. Further, when the stopper rod 62 is retracted, the tip end surface 62a thereof retracts from the contact surface 24a of the die.

A discard receiver 64 is connected to the die slide 22 by a hook 64a as shown in FIG. A piston rod 66a of a cylinder 66 for moving the discard receiver 64 and the die slide 22 is connected to the discard receiver 64. The cylinder 66 is attached to the end platen 12 by a bracket 66A.

A support base 68 is attached to the side of the end platen 12 opposite to the cylinder 66, and guide rails 70, 72 are provided on the upper surface thereof.
Is installed. The upper surfaces of these guide rails 70 and 72 are installed so as to be at the same level as the upper surface of the guide rail 20, and when the piston rod 66a of the cylinder 66 is projected, the die slide 22 becomes integral with the discard receiver 64. The guide rails 20, 70 and 72 are moved.
The guide rail 72 is parallel to the product extrusion direction (second
It is installed on a base 74 that is movable in the direction perpendicular to the plane of the drawing), and both sides of the base 74 are guided by guide rails 76. A cylinder 78 is installed on the lower surface side of the base 74, and the base 74 and the guide rail 72 above the base 74 are movable in a direction parallel to the product extrusion direction.

Next, the operation direction of the extrusion press device configured as described above will be described.

To perform extrusion from the state shown in FIG. 1, first, the billet is placed on the billet mounting surface 52a of the billet loader 52. Then, the extrusion cylinder 16 is operated to move the stem 60 forward,
The billet is loaded into the billet loading hole 49 of the container 48. Then, the rotating device 56 is operated to operate the billet loader 52.
Is retracted from the position between the container 48 and the extrusion cylinder 16. The container 48 is a cylinder for moving the container in advance.
It is moved by 50 so as to come into close contact with the die 24.

After the billet is thus loaded, the ram 58 is further advanced, and the billet is strongly pressed and pushed out from the die 24.

After the billet has been pushed out, the container moving cylinder 50 is operated to move the container 48 away from the die 24. Then, the cylinder 30 of the cutting device 28
Is operated and the cutting blade 32 is lowered to disconnect the product from the discard. After the cutting is completed, the cylinder 30 retracts the piston rod 30a, and the cutting blade 32 is moved to the first position.
Retract to the standby state shown in the figure.

Then, the cylinder 66 connected to the discard receiver 64 is operated and the piston rod 66a thereof is moved forward. Along with this, the stopper rod cylinder 63
Is operated to move the stopper rod 62 forward, and the container moving cylinder 50 is operated to move the container 48 until it comes into contact with the stopper rod tip surface 62a. After moving the discard receiver 64 to a position where the receiving opening 64b of the discard receiving 64 coincides with the billet loading hole 49, the discard receiving 64 is temporarily stopped, and the stem 60 is operated to drop the discard into the receiving opening 64b. After that, the piston rod 66a of the cylinder 66 is further projected, and the die slide 22 is moved to the two-dot chain line 2 in FIG.
Move to the position indicated by 2A. Die slide like this
After the 22 is carried out to the outside, the die 24 held by the die slide 22 is replaced with another die. Note that not only the die 24 but also the die slide 22 may be replaced together with the die. In this case,
Move the die slide 22 in the direction perpendicular to the paper surface of FIG.
You can set another die slide instead. After exchanging the die, the piston rod 66a is retracted, and the die slide 22 is returned to the extrusion position shown in FIGS.

While exchanging the dice, perform the following operations. That is, the stem 60 from which the discard is pushed out is retracted to the state shown in FIG. 1, and then the billet loader 52 is raised. Then, after placing another billet on the billet mounting surface 52a, the ram 58 is advanced to load the billet into the billet loading hole 49 by the stem 60. Next, the billet loader 52 is rotated in the falling direction and retracted from the position between the container 48 and the extrusion cylinder 16. At this time, the stopper rod 62 is in the advanced state, and the front end face of the container 48 is in contact with the stopper rod tip face 62a. Then, the container 48 waits for the replaced die 24 together with the die slide 22 to be introduced to the extruding position in a state where the container 48 is stopped at the immediately preceding position, for example, 3 to 10 mm, which is the contact position with the die 24.

After the replaced die 24 is introduced together with the die slide 22 to the extrusion position, the stopper rod cylinder 63 is operated to retract the stopper rod 62, and then the container moving cylinder 50 is operated to move the container 48 into the die 24. Contact with. Then the ram 58 is advanced to the stem.
Press the billet at 60 to perform extrusion molding.

By repeating the above procedure, extrusion press molding can be performed one after another while exchanging the die. And
It is possible to load a new billet into the container 48 during the die change and move the container 48 to a position immediately before contact with the die 24 so as to stand by. The space time between the press operation is extremely short. According to the present invention, in the usual case, this empty time is about 15 seconds, which is half that of the conventional case.

In the above embodiment, the stopper rod 62 is advanced by the stopper rod cylinder 63, and the stop positioning is performed when the container 48 is advanced to the position immediately before contact with the die, but the present invention is not limited to this. Instead of the one, a stop mechanism at the position immediately before contact may be incorporated in the container moving cylinder 50 itself. FIG. 3 is a longitudinal sectional view in the cylinder longitudinal direction showing the structure of a container moving cylinder 50A used in such an embodiment.

In FIG. 3, reference numeral 80 is a piston body, to which the piston rod 50a is connected. A plug 82 is screwed to the rear end of the cylinder 50A. The plug 82 has a cylinder hole 84, and a stopper piston 86 is provided in the cylinder hole 84. A short stopper rod 88 is connected to the stopper piston 86, and the stopper rod 88 penetrates the tip end surface of the plug 82 and the piston main body.
It is possible to project into the chamber 90 on the rear end side of 80.

The cylinder hole 84 is closed by a small plug 92.
A rod 94 having a small diameter is attached to the end surface of the stopper piston 86 on the side opposite to the rod 88 to confirm that the piston 86 has been reliably operated.
92 can penetrate and project to the outside. Reference numeral 96 is a port for introducing hydraulic pressure into the head end chamber 98 of the stopper piston 86, and reference numeral 100 is the stopper piston 86.
Shows a port for letting the oil in the chamber 102 on the rod end side of the above into the tank. Reference numeral 104 indicates a port for introducing hydraulic pressure into the chamber 90.

The structure of the hydraulic circuit for operating the cylinder 50A is shown in FIG. In FIG. 3, the hydraulic pressure source 10
Hydraulic pressure from 8 is pipe 110, electromagnetic switching valve 112 and pipe 114.
It can be introduced into the chamber 90 from the port 104 via the. Further, the hydraulic pressure from the hydraulic pressure supply source 108 can be introduced into the chamber 118 on the rod end side of the cylinder 50A via the switching valve 112 and the pipe 116. On the contrary, these chambers 90, 118
An oil reservoir tank 146 is connected to the switching valve 112 so that oil can be released from the oil reservoir tank 146.

A pipe 120 is branched from the pipe 114, and a hydraulic pressure supply source 10 is supplied to the chamber 98 via a pilot check valve 122 and a pipe 124.
The hydraulic pressure from 8 can be introduced. Reference numeral 126 is a pilot pressure supply source to the pilot check valve 122, and the pilot pressure can be supplied to the pilot check valve 122 via the pipe 128, the check valve 130, the pipe 132, the electromagnetic switching valve 134, and the pipe 136. ing.

A pipe 138 is branched from the pipe 124, the pipe 138 is connected to the pipe 132, and a check valve 140 is provided in the middle thereof. The pipe 124 and the switching valve 134 are connected via a pipe 142, and a check valve 144 is provided on the way. A relief valve 156 is connected to the pipe 124 via a pipe 154. Reference numerals 148, 150, 1
52 is a relief valve 156, a switching valve 134 and a port 100, respectively.
Shows an oil reservoir tank connected to. Also, the code
Reference numerals 112a, 112b and 134a denote solenoids of the switching valves 112 and 134.

In the hydraulic circuit having such a configuration, normally, the solenoid 134a is demagnetized, and the pilot check valve 122 is under pilot pressure.
2 is open. In this state, plug the piston body 80 into the plug 82
The solenoid 112a is energized in order to move the solenoid 112a back until it comes into contact with. Then, the hydraulic pressure from the hydraulic pressure source 108 is applied to the piping 1
It is introduced into the chamber 118 on the rod end side through the switching valve 112 and the pipe 116. Further, the oil in the chamber 90 returns to the oil reservoir tank 146 from the pipe 114 and the switching valve 112. Further, since pilot check valve 122 is open, oil in chamber 98 can return to oil reservoir tank 146 through line 124, pilot check valve 122, line 120. As a result, the piston rod 80 is urged to move backward, and the stopper rod 88 moves backward until it reaches the backward limit.
Also moves backward until it abuts on the plug 82.

When advancing the stopper rod 88 so that the piston rod 50a can take a position slightly protruding from the container contact surface 24a, the solenoid 134a of the switching valve 134 is excited and the pilot pressure applied to the pilot check valve 122 is set to 0. To do. This will allow the pilot check valve 122
Functions as a normal check valve. Then, the hydraulic pressure from the pilot pressure supply source 126 is supplied to the chamber 98 from the switching valve 134 and the pipes 142 and 124, and the stopper rod 88 moves forward together with the stopper piston 86. Since the set pressure of the relief valve 156 is set higher than the driving pressure of the stopper piston 86, the stopper rod 88 moves forward due to the hydraulic pressure. Further, even if the piston body 80 moves backward and comes into contact with the stopper rod 88 in the protruding state, the relief valve 156 is prevented from moving backward.
The set pressure of is set high enough.

To move the piston body 80 forward, the solenoid 112b is excited, and the hydraulic pressure from the hydraulic pressure source 108 is applied to the pipe 110, the switching valve 112,
It may be introduced into the chamber 90 via the pipe 114. At this time, room 118
The oil inside returns to the oil reservoir tank 146 from the pipe 116 through the switching valve 112.

In the container moving cylinder 50A shown in FIG. 3 configured in this way, when hydraulic pressure is introduced from the port 96 to move the stopper piston 86 forward, the stopper rod 88 is moved.
Project into the chamber 90. Then, the retreat limit of the piston body 80 is displaced to the right in FIG. 3, and the retreat limit of the piston rod 50A is also displaced to the right in FIG. When the stopper rod 88 is projected, the tip end surface of the container moving piston rod 50a is slightly projected from the contact surface 24a of the die 24 by, for example, 3 to 10 mm. Its length is set. Therefore, by protruding the stopper rod 88 as shown in FIG. 3, the container 48 can be stopped at the position immediately before the die contact. To bring the container 48 into contact with the die 24, the stopper piston 86 may be retracted to the left in FIG. 3, and the stopper rod 88 may be retracted from the chamber 90 into the plug 82. When the piston body 80 is retracted with the stopper rod 88 retracted, the container
The end surface of 48 is brought into close contact with the contact surface 24a of the die 24.

A small rod connected to the stopper piston 86
Reference numeral 94 is for visually observing from outside whether or not the stroke of the piston 86 is actually performed.

In the present invention, the stopper piston shown in FIG.
Instead of providing 86 and stopper rod 88, a container
A sensing device for accurately detecting the position of the container 48 may be provided, and the container moving cylinder 50 may be stopped when the container 48 moves to the position immediately before the die contact.

[Effect] As described above, according to the operating method of the extrusion press device of the present invention, the idle time (operation stop time) of the extrusion press device when the die is changed becomes extremely short, and the operation efficiency of the extrusion press device is improved. Remarkably improved. Further, according to the extrusion press device of the present invention, the container can be stopped at the position immediately before contact with the die, so that the operating method of the extrusion press device can be reliably executed.

[Brief description of drawings]

1 is a cross-sectional view in the extrusion direction showing an extrusion press device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a container according to another embodiment. Transfer cylinder
FIG. 50B is a cross-sectional view showing 50A. 12 …… End platen, 16 …… Extrusion cylinder, 22 …… Die slide, 24 …… Die, 28 …… Cutting device, 32 …… Cutting blade, 44 …… Column, 46 …… Container guide, 48 …… Container , 50 …… Container moving cylinder, 62 …… Stopper rod, 64 …… Stopper rod cylinder, 80 …… Piston body, 86 …… Stopper piston, 88 …… Stopper rod.

Claims (2)

[Claims] 1. An extrusion press device for supplying a billet from a billet loader to a container and performing a one-cycle extrusion press operation in which the billet is extruded from a die by a slam, and then exchanging the die to perform an extrusion press operation in the next cycle. In the operating method described above, while performing the die exchange operation between the first cycle and the next cycle, at the same time, the operation of supplying the billet from the billet loader to the container and the standby of the container immediately before the contact position with the die are performed. A method of operating an extrusion press device, which comprises performing a pushing operation by bringing the container into contact with the die after the die is completely replaced. 2. A die holding device, a die attachable to and detachable from the die holding device, a container which can be moved toward and away from the die by a driving device, and a billet loader arranged on the opposite side of the die from the container. And an extrusion device having a stem for billet extrusion, wherein a stopper mechanism for stopping the container at a position immediately before the contact position of the die is provided.