JP6202311B2 - Indirect extrusion press die stem lock device - Google Patents

Description

  The present invention relates to a die stem slide device provided in an indirect extrusion press device, and more particularly to a die stem slide device in which a die stem that presses a billet loaded in a container is mounted horizontally, and the shaft core of the extrusion press when the die stem is replaced. The present invention relates to an extrusion press die stem lock device that can fix a die stem to a die.

The aluminum alloy extrusion press includes a direct extrusion press and an indirect extrusion press.
In the direct extrusion press, when a billet loaded in a container is extruded from a die as an extruded product by advancing the extrusion stem, the billet is pressed between the billet and the container sleeve in addition to the force for pressing the billet by the extrusion stem. A friction force that is opposite to the output is generated, and part of the pushing force that presses the billet with the extrusion stem becomes the friction force between the billet and the container sleeve, and the pressing force of the extrusion stem cannot be used entirely for billet extrusion. It is difficult to extrude the billet.

  In contrast to the direct extrusion press, in the case of an indirect extrusion press, when a billet loaded in a container is obtained from a die by advancing the extrusion stem to obtain an extruded product of a predetermined shape, the billet is relatively positioned between the billet and the container sleeve. Because there is no movement, there is no friction force acting opposite to the pushing force between the billet and the container sleeve, and the pushing force by the extrusion stem can be fully used for product extrusion, so the hard metal billet is pushed out. It is possible.

For this reason, direct or indirect extrusion is used depending on the hardness of the metal, such as using a direct extrusion press if the billet is made of a soft metal and conversely using an indirect extrusion press if the billet is made of a hard metal. Mainly used as a press-only machine.
According to the prior literature, as a die lock device, a rod using hydraulic pressure from the end platen's non-die stem side to the die stem is used to tighten the nut when fixing the die stem, and release the nut tightening tension when moving the die stem. It is known to do.

JP-A-6-71332

Conventionally, the problems to be solved by the present invention have a large number of parts such as a lock rod, a release spacer, a lock nut, a lock nut, a presser nut, and an outer cylinder, and the structure is complicated.
Further, a hydraulic pipe for locking or unlocking and a hydraulic unit for driving are required, and more parts and devices are required when combined with mechanical parts.
In addition, the setting / adjustment of the locking force required confirmation of the extension of the rod, etc., making it difficult to set. (The locking force changes depending on the tightening amount of the nut.)
In addition, it is necessary to install hydraulic piping on the end platen through which the high-temperature extruded profile passes, and there is a risk of ignition when oil leakage occurs.

In order to solve the above problem, the present invention slidably attaches a die stem slide to a slide guide member on a holding body of an end platen extending in a horizontal direction perpendicular to the extrusion direction,
By placing and fixing the die stem on the die stem slide, it is possible to slide on the slide guide member extending in the same direction as the horizontal direction perpendicular to the extrusion direction ,
The locking means for pressing the side surface portion of the protrusion formed on the upper and lower sides of the side end portion of the die stem slide to the end platen side is constituted by a booster mechanism using an insulator , and
The presser roller device includes a rod casing, a spring, a presser rod, and a presser roller. The spring is held in the rod casing, and the presser roller device moves up a die stem slide placed below the presser roller device. The center of the die stem can be centered by pressing in the vertical direction and the die stem can be centered, and the die stem centered by the centering means is locked by the locking means.

The drive source of the booster mechanism using the lever is an air cylinder or an electric motor.

  In the indirect extrusion press, the locking means that presses the side end of the die stem slide is configured with a booster mechanism using a lever, so the device has a simple lever structure, so the number of parts is small and the structure is simplified. It was.

In addition, when an electric motor is used as the drive source, only the electrical wiring is used, and when an air cylinder is used, the device can be driven by the construction of only the air piping, and the cost of the drive source of the equipment is not much reduced. .
In addition, since it is directly driven by an electric motor or air cylinder, adjustment work for setting the locking force is not required.
Furthermore, since it is driven by an electric motor or air cylinder, there is no risk of ignition and safety is increased.

It is side surface sectional drawing which shows the outline of the part from the end platen of an indirect extrusion press to a main cross head. It is an operation | movement flowchart of the indirect extrusion press of this invention. It is a vertical sectional view explaining an embodiment of a die stem lock device of the present invention. It is the figure seen from the container direction explaining embodiment of the die stem locking device of the present invention. Sectional drawing explaining embodiment of the pressing roller of this invention

First, an outline of the indirect extrusion press will be described.
FIG. 1 shows an outline between the end platen 31 and the main crosshead 38 of the indirect extrusion press. An end platen pressure ring 32 is installed on the end platen 31, and a die stem holder 36 and a die stem 35 are attached to the end platen 31. A die 33 is held at the tip of the die stem 35. The container 34 is held by a hydraulic cylinder (not shown).
On the other hand, an extrusion block 37 is installed on the main crosshead 38. The billet 39 held in the container 34 is pressed into the container 34 and the billet 39 simultaneously by an extruding block 37 that receives the hydraulic pressure of a main cylinder (not shown) and is formed into a predetermined shape by a die 33, and passes through the hollow portion of the die stem 35. The extruded product 40 is extruded in the direction of the end platen 31.

Next, the operation flow of the indirect extrusion press apparatus will be described with reference to FIG.
The container 34 stands by at the position of the die stem 35 (S1). A billet loader (not shown) supplies the billet 39 (S2). The billet 39 is sandwiched between the die stem 35 and the extrusion block 37 (S3). The billet loader is retracted outside the machine (S4). The container 34 moves to the position of the billet 39 (contacts with the extrusion block 37) (S5). The die 33 is supplied between the die stem 35 and the container 34 by a die loader (not shown) (S6). The container 34, the extrusion block 37, and the die loader move to the die stem 35 side (S7). The die loader is retracted outside the machine (S8). Start of extrusion (S9). A container stopper (not shown) enters between the container 34 and the die stem holder 36 (S10). Completion of extrusion (S11). The extrusion block 37 moves backward and the container 34 moves to the container stopper side (S12). The discard (not shown) is scraped off (S13). The extruded product 40 is all extracted in the extrusion direction (S14). The container 34 moves toward the extrusion block 37 (S15). The container stopper is retracted outside the machine (S16). The die loader enters the press center (S17). The container 34 moves in the extrusion direction (S18). The die 33 is retracted outside the machine (S19).

  The die stem slide device shown in FIG. 3 includes an end platen 31, a sliding liner (not shown), an end platen pressure ring 51, a die stem pressure ring 52, a die stem fixing part 53, a die stem 54, a die stem slide 55, and a slide guide 56a. 56b, 56c, a slide guide member 57, a holding body 58, and a die stem slide cylinder (not shown). A slide guide member 57 is fixed to the holding body 58, and the end platen pressure ring 51 and the sliding liner are formed with a slide portion fixed to the end platen 31. The die stem slide 55 can slide in the horizontal direction on this slide portion.

  The base portion 59 of the die stem is clamped to the die stem pressure ring 52 by the die stem fixing component 53, and the die stem 54 is held horizontally and supported. Further, the die stem slide 55 and the die stem pressure ring 52 move horizontally by the operation of the die stem slide cylinder. FIG. 4A shows a position where the die stem is exchanged.

The locking means of the die stem slide device shown in FIGS. 3 and 4 will be described.
The locking means basically includes a presser lever 71, a pressing portion 72, a lever rotation center shaft 73, a bearing 74, a clevis 75, and a drive source (air cylinder) 76. The bearing 74 and the drive source (air cylinder 76) are attached to the end platen 31.
The presser lever 71 is structured to be able to rotate around a pressing portion 72, a connecting portion (connected to a cylinder by a clevis), and a lever rotation center shaft 73, and is provided to be able to rotate and slide by a drive source (air cylinder) 73. .
Further, by pressing the die stem slide 55 with the presser lever 71, the gap generated between the die stem pressure ring 52 and the sliding surface of the end platen pressure ring 51 is eliminated, and vertical deflection of the die stem can be prevented. it can.

The drive source (air cylinder) 76 has a head side attached to a stand 77 fixed to the upper and lower surfaces of the end platen 31 and a rod side attached to the other end of the presser lever 71 via a clevis. The shoulder of the die stem slide 55 is pressed by the pressing portion 72 of the presser lever 71 by the operation of the drive source (air cylinder) 76.
As indicated in FIG. 4, when air pressure is applied to the head side of the drive source (air cylinder) 76, the presser lever 71 presses the die stem slide 55, and the rod of the drive source (air cylinder) 76. When the air pressure is applied to the side, the pressing of the presser lever 71 is released.

If the pressing portion of the die stem slide 55 and the pressing portion 72 of the pressing lever 71 do not contact in parallel when the die stem slide 55 is pressed by the pressing lever 71, the pressing force of the pressing lever 71 is accurately transmitted to the die stem slide 55. Absent.
Therefore, the position of the lever rotation center shaft 73 is determined in advance so that the pressing portion of the die stem slide 55 and the pressing portion 72 of the presser lever 71 are parallel to each other.
In the present invention, the pneumatic cylinder is used as the lock means. However, the present invention is not limited to this, and a drive mechanism that converts a rotary motion into a linear motion using an electric motor, a ball screw, and a ball nut may be employed. .

A press roller device is disposed on the upper end surface of the die stem slide 55. The structure of the presser roller device is shown in FIG.
A spring 83 is accommodated in the rod casing 81, and the opening of the rod casing 81 is sealed with an upper lid 82. On the opposite side of the upper lid 82, there is a presser rod 84, which is given a force in a direction extending by a spring 83. A presser roller 85 is attached to the tip of the presser rod 84. When the front end of the presser roller 85 is pushed upward, a force to be restored by the spring force works.
This presser roller device is fixed downward to the end platen 31, presses the die stem slide 55 from above, and presses it against the slide guide member 57. As a result, while the die stem slide 55 moves horizontally, the die stem slide 55 does not shake vertically, and the axial center position of the die stem 54 can be secured.

  In the indirect extrusion press, the lock means that presses the side end of the die stem slide has a lever structure that has a center of rotation and applies the principle of levers. Less, the structure is simple, and maintenance is easy.

In addition, when an electric motor is used as the drive source, only the electrical wiring is used, and when an air cylinder is used, the device can be driven by the construction of only the air piping, and the cost of the drive source of the equipment is not much reduced. .
In addition, since it is directly driven by an electric motor or air cylinder, adjustment work for setting the locking force is not required.
Furthermore, since it is driven by an electric motor or air cylinder, there is no risk of ignition and safety is increased.

31 End platen 37 Extrusion block 38 Main cross head 39 Billet 40 Extruded product 51 End platen pressure ring 52 Die stem pressure ring 53 Die stem fixing part 54 Diestem 55 Diestem slides 56a, 56b, 56c Slide guide 57 Slide guide member 58 Holding body 71 Presser lever 72 Pressing portion 73 Lever rotation center 74 Bearing 75 Clevis 76 Drive source (air cylinder)
81 Rod casing 82 Upper lid 83 Spring 84 Presser rod 85 Presser roller A Die stem replacement position

Claims (2)

A die stem slide is slidably attached to a slide guide member on a holding body of an end platen extending in a horizontal direction perpendicular to the extrusion direction.
By placing and fixing the die stem on the die stem slide, it is possible to slide on the slide guide member extending in the same direction as the horizontal direction perpendicular to the extrusion direction ,
The locking means for pressing the side surface portion of the protrusion formed on the upper and lower sides of the side end portion of the die stem slide to the end platen side is constituted by a booster mechanism using an insulator , and
The presser roller device includes a rod casing, a spring, a presser rod, and a presser roller. The spring is held in the rod casing, and the presser roller device moves up a die stem slide placed below the presser roller device. Of the indirect extrusion press characterized by having a centering means capable of centering the die stem by positioning in the vertical direction by pressing from the center, and the die stem centered by the centering means is locked by the locking means. Die stem lock device.
The die stem lock device for an indirect extrusion press according to claim 1, wherein a drive source of the booster mechanism by the lever is an air cylinder or an electric motor.

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