JPH03146219A - Extruding press apparatus - Google Patents

Abstract

PURPOSE:To improve the working rate of an extruding press apparatus by providing a position detecting device to a container and stopping the piston rod of a container cylinder in the middle of a stroke. CONSTITUTION:A pressing device is provided with an end platen 12, a die 24, a container 38, a ram 58 provided with a stem 60 for pressing a billet from the downstream side in the extruding direction. A container cylinder 40 which moves the container 38 in the attachable and detachable direction to and from the end platen 12 is provided on the end platen 12. A cutting device 28 is pro vided at the boundary part between the container 38 and the die 24 to feed a cutting edge 32. For that purpose, a container position detecting device 92 is provided. At the same time, the piston rod 42 of the container cylinder 40 can stop in the middle of a stroke. Consequently, an idle time between stages of the extruding press can remarkably be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an extrusion press apparatus, and particularly to an extrusion press apparatus designed to shorten idle time between pressing steps.

[Prior Art] When extrusion pressing is performed using an extrusion press device, a billet on a billet loader is loaded into the container by a stem at the tip of a ram while the container is pressed against a die. (Normally, a fixed dummy block is attached to the stem, but there are cases where a dummy block is interposed between the stem and the billet.) Then, the ram is further advanced and the billet is strongly pressed by the stem. The billet is extruded from the die as an extruded product in a predetermined shape.

After extruding the billet, the container is slightly retreated by the container cylinder, and the main ram is retreated from the position where the day skirt is removed from the container.Next, the cutting blade of the cutting device is sent between the container and the die. Remaining billet on the front of the die (referred to as the day skirt)
Separate from.

Thereafter, the ram is retracted to remove the stem from the container, and the next billet is inserted into the container for the next cycle of 8 extrusion press operations.

[Problem to be solved by the invention] Conventional equipment had the following issues.

When retracting the container after extruding the billet, the container cylinder was moved to its retracting limit. As a result, an unnecessarily large gap is created between the container and the die, the time required for the container to retreat is increased, and the idle time between pressing steps is unnecessarily extended.

[Means for Solving the Problems] The present invention provides an end platen, a die, a container, and a pressing device having a ram whose tip is provided with a stem for pressing the billet inside the container in this order on the downstream side in the extrusion direction. This invention relates to an extrusion press device installed from

The end platen is provided with a container cylinder that moves the container toward and away from the end platen, and is further provided with a cutting device that sends a cutting blade to the boundary between the container and the die. The extrusion press apparatus according to claim 1 is characterized in that it is provided with a container position detection device and is capable of stopping the piston rod of the container cylinder midway through its stroke.

[Operation] The piston rod of the container cylinder is stopped mid-stroke so that the minimum gap necessary for the cutting blade of the cutting device to enter is formed between the die and the container. Therefore, the stroke time of the container cylinder (the time required for the container to move) is shortened.

[Example] The following is a first explanation of the configuration of an extrusion press apparatus according to an example.
．． This will be explained using Figure 2.

FIG. 1 is a plan view of essential parts of an extrusion press apparatus, and FIG. 2 is a sectional view taken along the extrusion direction.

Reference numeral 10 denotes a machine base, on which an end platen 12 is fixedly installed on one end side and a cylinder mounting block 14 on the other end side.
is installed, and an extrusion cylinder 16 is fixed to the cylinder mounting block 14. The lower part of the end platen 12 on the side facing the extrusion cylinder 16 protrudes to form a die support part 20, and a die slide 22 is installed on the die support part 20 so as to be slidable in the width direction of the machine. This die slide 22 holds 24 dice.

The die slide 22 is moved in the machine width direction by a cylinder 25 provided on the side of the end platen 12.

Then, the rear surface of the end platen 12 (extrusion cylinder 16
It is possible to reciprocate between an extrusion operation position located on the side surface) and a die exchange position where the die is removed from the back surface of the end platen 12.

A bracket 26 is fixed to the upper part of the end platen 12 on the side facing the extrusion cylinder 16, and a cutting device 28 is provided on the bracket 26. The cutting device 2
Reference numeral 8 is for cutting a day skirt of a die to be described later and a product part, and includes a cutting blade 32 that is stroked in the vertical direction 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 in a portion of the column 34 on the end platen 12 side, and a container 38 is installed along the container guide so as to be movable eight times 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 4o is connected to the container holder 38A, and the container cylinder 4o
By moving the piston rod 42 forward and backward, the container holder 38A can be moved in the left-right direction in FIG. 1.2. Note that the container 38 mounted on the container holder 38A has a billet loading hole 44, and a container sleeve 46 is mounted in the billet loading hole 44.

A billet loader 52 is provided on the extrusion cylinder 16 side of the container 38. The billet loader 52 can be retracted from the stem advancing/retracting area by a drive device (not shown).

The extrusion cylinder 16 includes a ram 58, and a stem 60 is attached to the tip of the ram 58 via a head plate 56 and a mounting member 54. An oil reservoir tank 62 is provided above the cylinder 16.
The oil reservoir tank 62 and a hydraulic oil inlet 64 at the rear end of the cylinder 16 are connected through a prefill valve 66. A butterfly valve 68 is installed in this prefill valve 66. The introduction port 64 includes the introduction port 6
A valve 70 for opening and closing 4 is installed. This valve 7
0 is opened and closed by a cylinder 72.

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

This head plate 56 and the container holder 38A
are connected to position detection devices 90 and 92 such as linear scales for detecting their positions.

In addition, the cylinder 16.25.28.40.76.7
8 is connected to a hydraulic pressure supply pipe (not shown in FIG. 1.2).

A method of operating the extrusion press apparatus configured as described above will be explained next.

To perform extrusion from the state shown in Figure 1.2, first, during extrusion in the previous cycle, the billet for the next cycle (for which length measurement has been completed) must be received by the billet loader and interfered with the container and main ram. Partially elevated to position. Raise the billet loader to the press. The ram 58 of the extrusion cylinder 16 is then advanced to advance the stem 60 and the billet 96 is loaded into the billet loading hole 44 of the container 38. When the ram 58 moves forward, the valve O is opened and the ram 58 is moved forward by the side cylinders 76, 78. As the ram 58 moves forward, a large amount of hydraulic oil flows from the oil reservoir tank 62 into the extrusion cylinder 16 via the prefill valve 66.

Next, the billet loader 52 is retracted from the position between the container 38 and the extrusion cylinder 16. In addition, container 3
8 has been moved in advance by the container cylinder 40 so as to come into close contact with the die 24. After loading the billet 96 in this manner, the ram 58 is further advanced,
During this strong advance of the ram 58, which presses the billet 96 strongly and extrudes it from the die 24, the valve 70 is closed, and instead, hydraulic pressure is supplied into the extrusion cylinder 16 via another valve. .

After extruding the billet, the container cylinder 4
0 is activated to move the container 38 away from the die 24, and the main ram is retracted from the position where the day skirt is removed from the container.Then, the cutting device 2
The product and the day skirt are cut by operating the cylinder 30 of No. 8 and lowering the cutting blade 32. After cutting is completed, the cutting blade 32 is moved back to the standby state shown in FIG. 5 by the cylinder 30. Thereafter, the ram 58 is retreated to a predetermined standby position, and the container 38 is moved to the die 24.
6 lines are applied to the next extrusion press process. In addition,
Retraction of the ram 58 is performed by the side cylinder flow 78.

When the ram 58 is retracted by the side cylinders 76 and 78, the remaining extrusion pressure is first released by the pressure relief valve, and then the hydraulic oil in the extrusion cylinder 16 is transferred to the oil reservoir tank 62 from the prefill valve 66 for oil discharge. be returned.

In the apparatus of this embodiment, when the container 38 is moved eight times in the direction away from the die 24 after extrusion is completed, the position of the container 38 is continuously detected by the position detection device 92, and the cutting blade 32 of the cutting device 28 is inserted into the container 38. The piston rod 42 of the container cylinder 40 is stopped mid-stroke so that the minimum necessary gap is formed between the die 24 (die slide 22) and the container 38. Therefore, the stroke time of the container cylinder 40 (the time required to move the container 38) is short.

The position detection device controls the amount of partial retraction of the container to a minimum.

For this reason, the device of this embodiment has an extremely short idle time.

[Effects] As is clear from the above examples, according to the apparatus of the present invention, the travel distance of the container is shortened, and the idle time between extrusion press steps is significantly shortened. And as a result of this,
The operating efficiency of the extrusion press equipment is improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the embodiment device, and FIG. 2 is a longitudinal cross-sectional view. 16... Extrusion cylinder, 24... Die, 28...
- Cutting device, 32... Cutting blade, 38... Container, 58... Ram, 60... Stem, 90.92... Position detection device.

Claims (1)

[Claims] (1) An end platen, a die, a container, and a pressing device having a ram having a stem at its tip for pressing the billet in the container are arranged in this order from the downstream side in the extrusion direction, and the end platen is disposed in this order from the downstream side in the extrusion direction. The platen is provided with a container cylinder that moves the container toward and away from the end platen, and is further equipped with a cutting device that sends a cutting blade to the boundary between the container and the die. An extrusion press apparatus characterized by being provided with a position detection device and capable of stopping a piston rod of a container cylinder in the middle of a stroke.