JPH0798212B2 - Extrusion press die lock device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a die lock device of an extrusion press used for fastening and detaching a punching die having a product shape surface to an end platen.

[Prior Art] When an extrusion press is performed by an extrusion press device, the die is brought into contact with the container in a pressed state, and the billet on the 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 normally 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.

Hereinafter, the configuration of such an extrusion press device will be described with reference to FIGS. 3, 4, and 5.

FIG. 3 is a cross-sectional view taken along the extrusion direction of the extrusion press device.

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 as it is dropped from above into the die mounting portion 22b. ing.

A discard receiver (not shown) is connected to the die slide 22 so as to be adjacent in the machine width direction, and the discard receiver is also moved in the machine width direction along the guide rail 20 and the like.

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 62 in a container 48, which will be described later, from the extruded product portion, and is provided with a cutting blade 32 that is vertically stroked by a cylinder 30.
The cylinder 30 is mounted on a cylinder mounting base 36 provided above the pillar 34, and the piston rod 30
A 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, and an engaging portion 22c formed on the upper surface of the die slide 22 is slidably engaged with the key member 42. Both the key member 42 and the engaging portion 22c extend in the machine width direction.

The die slide 22 is moved in the machine width direction by a cylinder (not shown) provided on the side of the end platen 12. Further, as shown in the drawing, 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.

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.

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 (not shown) 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,
48 can be moved to the left and right 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 turning device 56, and the upper end of the billet loader 52 is tiltably installed 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.

To perform the extrusion from the state shown in FIG. 3, first, the billet 51 and the dummy block 51a are placed on the billet mounting surface 52a of the billet loader 52, and then the billet loader 52 is raised to a position where it can be extruded by the stem 60. . Then, the extrusion cylinder 16 is operated to move the stem 60 forward, and the billet 51 is loaded into the billet loading hole 49 of the container 48 together with the dummy block 51a. Then, the rotating device 56 is operated to retract the billet loader 52 from the position between the container 48 and the extrusion cylinder 16. The container 48 is moved in advance by the container moving cylinder 50 so as to come into close contact with the die 24.

After the charging of the billet 51 is completed in this way, the ram 58 is further advanced and the billet 51 is strongly pressed and pushed out from the die 24.

After the billet 51 has been pushed out, the container moving cylinder 50 is operated to move the container 48 away from the die 24. Then the cylinder of the cutting device 28
The product 63 is activated by activating 30 and lowering the cutting blade 32.
When disconnecting the discard card 62 from the discard card 62, the discard card 62 drops downward. After the cutting is completed, the cylinder 30 retracts the piston rod 30a and retracts the cutting blade 32 to the standby state shown in FIG. Here, when the discard 62 is cut by the cutting blade 32, the die 24 is cut by a downward force due to a shearing force.
A die clamp 61 as shown in FIG. 5 is provided in order to prevent the upper surface of the die from tilting forward.

In order to replace the die 24 and perform the next extrusion press, the die slide 24 is moved to a support table on the front side in the vertical direction of the paper surface, and separated from the position behind the end platen 12. Then, here, the die 24 is removed from the die slide 22 and another die is mounted instead. After that, the die slide 22 is moved to the inner side in the direction perpendicular to the paper surface, and returned to the extrusion position shown in FIG.

[Problems to be Solved by the Invention] In such an extrusion press, after the extrusion of the billet is completed, the container moving cylinder is operated to separate the container from the die, and then the cylinder of the cutting device is operated to perform cutting. When trying to cut the product discard by lowering the blade, a downward force due to the cutting resistance is exerted on the boundary surface of the product and the discard (the front end of the die is pushed down and the rear end of the die is tried to be lifted. Force) acts. Along with this, the lower surface of the die slide, which has a U-shaped front surface that moves in the machine width direction on the guide rail, is fitted in an uneven shape so as not to deviate from the upper surface of the guide rail when sliding. Although it is not possible to tilt it, the upper surface of the die slide has the die placed on the U-shaped bottom area and is not firmly held so that it cannot lean forward. Due to the downward force of the cutting force with the product, the die mounted on the die slide tilts as the rear end of the die rises, and with this, the upper end of the die slide also tries to tilt toward the container. . Therefore, due to tilting of the die body, the product itself near the die is bent in a convex shape, or in the boundary area deviating from the die extrusion port, the die extrusion port corner is scratched outside the product, and further cutting The device cannot completely separate the discard from the product, and a part of the discard remains on the end face of the die, and if the container is pressed firmly against the die in this state, burrs will be generated during extrusion in the next cycle. It had a problem that it was likely to occur.

[Means for Solving the Problems] In order to solve such a problem, in the present invention, in an extrusion press device in which a die is held by a die slide that is movable along a die arrangement side surface of an end platen, The engaging block is provided by engaging with the upper end of the die slide, and the guide rail is provided by engaging with the lower end of the die slide, and the engaging block and the guide rail are respectively provided on the end platen. The device for locking the die is provided so as to be engaged with the lock cylinder through the lock rod arranged through the hole.

[Operation] In the extrusion press device of the present invention, when the billet is extruded by the stem and then the product remaining in the die and the discard are separated by the cutting blade of the cutting device,
To prevent the die from tilting due to cutting force,
The die slide on which the die is placed is locked immovably by pressing the die against the pressure ring surface by locking the upper end and the lower end of the die slide to the end platen side so that the die slide cannot tilt forward. Therefore, the product and discard can be completely separated at a desired position. In this way, by locking the die, the die assembly (which is referred to as the die in the text, which can be divided into three sections.
It is possible to eliminate the clearance inside the bolster, dummy bolster and die from the pressure ring side), the clearance between the die cutting surface and the cutting blade 32 cutting surface becomes constant, and the sharpness of the discard 62 improves. .

When replacing the die, first remove the working oil from the lock cylinder to unlock the die slide on which the die is placed and also unlock the die, so place the die on the die slide. It is possible to move it in the machine width direction while it is placed.

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

FIG. 1 is a longitudinal sectional view along the extrusion direction near the end platen of an extrusion press apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.

In this embodiment, a discard receiver 64 is connected to the die slide 22 by a hook 64c which can be easily released from the connection, as shown in FIG. The discard card 64
A piston rod 66a of a cylinder 66 for moving the discard receiver 64 and the die slide 22 is connected to the. 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, 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. These guide rails 20, 70, 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 upper guide rail 72 can be moved in a direction parallel to the product extrusion direction.

Mainly as shown in FIG. 1, a pressure ring 101 is installed immovably between the die slide 22 and the end platen 12.

Further, on the support portion 18 integrated with the end platen 12,
A guide rail 20 is provided. The upper surface of the guide rail 20 has a convex shape 20a.
The lower surface has a concave shape 22a so as to engage with, and the die 24 is placed on the die slide 22 and mounted at the extrusion position. Here, the lock device according to the present invention will be described.

Locking device 100 is locking block 120, locking rod
116a and a lock cylinder 114.

Now, as shown in FIG. 1, a cylinder 114 for fixing the die 24 when the die 24 is in the pushing position is mounted on the side surface of the end platen 12 so as to be spaced apart from each other.

The locking rod 116a of the locking cylinder 114 is inserted into the through hole 118 of the end platen 12, and its tip is connected to the locking block 120 having an L shape. Further, a screw for mounting the bolt 115a is engraved at the tip of the locking rod 116a, and after the locking block 120 is inserted, the screw is screwed into the bolt 115 and tightened. Bolt 115 with several extra screws on the head
The locking block 120 is fixed.

An upper give 26 and a lower give 27 are provided at the most distal ends of the upper and lower locking rods 116a as described above. The inside of the upper gib 26 and the lower gib 27 has a hole diameter slightly larger than the outer diameter of the bolt 115 fastened to the locking rod 116a, and the forward movement of the locking rod 116a when the upper gib 26 and the lower gib 27 are attached. An extra hole is cut in the length of the difference between the limit and the retreat limit.

Also, the rear end of the locking rod 116a is a locking cylinder.
It is fixed to the piston engaged with 114 and the cutting device 28
Die slide 22 when cutting discard 62 by
When pressure oil is introduced to the piston rod side of the locking cylinder 114 so that the die 24 placed on the top does not tilt and the locking block 120 is moved leftward in FIG. 1, the die 24 becomes a product. It moves in the extrusion direction and is strongly pressed against the pressure ring 101.

On the other hand, as described above, after the die 24 is placed on the die slide 22, after the billet is extruded, the die slide 22 is moved in the width direction of the machine to move the position of the die 24 to the pressure ring 101. When it is desired to release from the regular mounted state, when pressure oil is supplied to the piston head side of the lock cylinder 114, the locked state in which the pressure ring 101 of the die 24 mounted on the die slide 22 is pressed is released. It has a structure.

The operation of the extrusion press device configured as described above will be described.

If it is necessary to replace the die slide 22 with the die 24 or only the die 24, the locking device 10
Activate 0.

First, when pressure oil is supplied to the piston head side of the locking cylinder 114 of the locking device 100, the locking block 120 moves forward via the locking rod 116a, so the locking block 120 moves to the pressure ring 101 side. The engaged state with the pressed die slide 22 is released. Next, when pressure oil is supplied to the piston head side of the cylinder 66, the die 24 mounted on the die slide 22 also advances from the position of the die 24 shown in FIG. The slide 22 will also be replaced.

Thus, after replacing the die 24, when the pressure oil is supplied to the piston rod side of the cylinder 66 to move the die 24 around the press center, the pressure oil is first applied to the piston head side of the locking cylinder 114 of the locking device 100. When the die 24 placed on the die slide 22 moves to the center of the press, the piston head side of the locking cylinder 114 is opened and the piston rod side is opened. Pressure oil is introduced and the die 24 is locked between the pressure rings 101 by retracting the locking block 120.

Next, in order to perform extrusion from this state, first, the billet 51 is placed on the billet mounting surface 52a of the billet loader 52 and the dummy block 51a is attached to the pressing side of the billet 51. Then, the extrusion cylinder 16 is operated to advance the stem 60, and the billet 51 is loaded into the billet loading hole 49 of the container 48. Then, the rotating device 56 is operated to retract the billet loader 52 from the position between the container 48 and the extrusion cylinder 16. The container 48 is moved in advance by the container moving cylinder 50 so as to come into close contact with the die 24.

After the loading of the billet 51 is completed in this way, the ram 58 is further advanced, and the billet is strongly pressed and pushed out from the die 24. During this extrusion, the die 24 is the plate 11
It is pressed against the end platen 12 via 4.

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, the discard is dropped downward. After the cutting is completed, the cylinder 30 becomes the piston rod.
30a is retracted, and the cutting blade 32 is retracted to the initial state shown in FIG. After that, the piston rod 66 of the cylinder 66
A is projected and the die slide 22 is moved to the position on the base 74 shown by the chain double-dashed line 22A in FIG. Thus, the die 24 held by the die slide 22 is replaced with another die.

In the present invention, two lock devices 100 are provided on each of the upper portion and the lower portion of the die slide 22, but the number of locking devices 100 may be increased depending on the size of the die 24.

[Effects of the Invention] As described above, according to the extrusion press device of the present invention, since the die and the die slide are devices for die clamping and locking, respectively, the die and the die slide are firmly held in contact with the pressure ring. The die slide and the die itself do not tilt toward the container when the discard attached to the die is cut off, and therefore the product is not damaged at the corner of the die extrusion port. In this way, by locking the die, the die assembly (called as the die in the text, this die can be divided into 3 sections. That is, the die having a bolster, a dummy bolster and a die from the pressure ring side. The gap between the die cutting surface and the cutting blade 32 cutting surface becomes constant, and the sharpness of the discard 62 improves. Further, since the product and the discard are completely separated from each other, it helps prevent burrs and improves the operation rate of the extrusion press device.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view along the extrusion direction near the end platen of an extrusion press apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. An example is a cross-sectional view, FIG. 4 is a vertical cross-sectional view along the extrusion direction near the end platen of a conventional extrusion press, and FIG. 5 is a V of FIG.
Each of the -V line sectional views is shown. 10 …… Machine base, 12 …… End platen, 16 …… Extrusion cylinder, 20 …… Guide rail, 22 …… Die slide, 24 …… Die, 26 …… Upper give, 27 …… Lower give, 28 …… Cutting device, 30 …… Cylinder, 32 …… Cutting blade, 48 …… Container, 51 …… Billet, 100 …… Locking device, 114 …… Locking cylinder, 116 a …… Locking rod, 120 …… Locking For blocks.

Claims (1)

[Claims] 1. An extrusion press apparatus in which a die is held by a die slide that is movable along a side of the end platen on which the die is arranged, and a locking block is provided by engaging with an upper end of the die slide. A guide rail is provided by engaging the lower end portion of the die slide, and the locking block and the guide rail are inserted through the through holes provided in the end platen, respectively, and the locking cylinder is provided through a locking rod. A die lock device for an extrusion press, comprising a device for locking a die engaged with the die lock device.