JPS6261366B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an extrusion press equipment equipped with an extrusion tool cleaning device.

Regardless of whether the metal extrusion press is a direct extrusion or indirect extrusion press, a solid material extrusion press, or a hollow material extrusion press, the extrusion tool, i.e.
It is necessary to clean the die that determines the external shape of the product and the mandrel that determines the internal shape of the product every few presses.

In other words, if a shell adheres to the die hole of the die or to the mandrel tip, it not only causes deterioration of product quality and deterioration of the properties of the inner and outer surfaces of the product, but also causes damage to the hollow material extrusion press. Cleaning work to remove the shell is essential because of abnormal tensile loads acting on the mandrel.

Conventionally, the cleaning work of the extrusion tool has relied exclusively on manual work by operators using special jigs, which is not only labor-intensive and dangerous work, but also quick and difficult to clean. Accurate cleaning work could no longer be expected.
In particular, the recent demand for labor saving and automation is also an urgent need for extrusion press equipment, and the cleaning work of the extrusion tools mentioned above is a major obstacle to unmanned and automated extrusion press equipment. It was.

The present invention has been developed in view of the above various points, and by equipping an extrusion press with a mechanically processable cleaning device as ancillary equipment,
To provide extrusion press equipment capable of carrying out cleaning work every few presses while an extrusion tool is equipped at the center of the extrusion press.

Other features, advantages, and usefulness of the present invention will be apparent from the following detailed description of embodiments of the present invention with reference to the drawings.

1 to 5 show an embodiment of the present invention in which an extrusion press P is equipped with a die cleaning device 8,
FIG. 1 illustrates an extrusion press P for hollow extrusion products that can be used for both direct and indirect extrusion. Of course, the extrusion press P may be of any type, such as a direct type, an indirect type only, or an extrusion press for solid extruded products.

Referring to FIG. 1 and FIG. 2, the configuration of an example of the press will be briefly described. The press platen 26 and the main cylinder frame 27 are spaced apart from each other in the front and back and are arranged facing each other, and both 26 and 27 are arranged diagonally. Column 2
8 to form a press frame having a so-called rigid frame structure.

A long cylindrical die stem 29 is installed at the press center of the press platen 26 via a support device 28, and a holder 30 is installed at the rear end of the die stem 29.
A die 31 is attached via the . The die 31 is an example of an extrusion tool to be cleaned, and there are two types: a loose die and a so-called fixed die that remains attached to the die stem 29. die) 31.

An extrusion force generating device 32 is provided at the press center of the main cylinder frame 27, and a side cylinder device 33, a hydraulic coupling device 34,
A mandrel drive device 35, a mandrel locking device 37 with a buffer means 36, etc. are provided.

The extrusion force generating device 32 consists of a cylinder 38 and a main ram 39 that fits into the cylinder 38, and a crosshead 40.
A pressurizing stem 41 is provided at the center of the press via the crosshead 40, which is connected to a sliding guide device 4 shown in FIG.
2, it is slidable back and forth on the press frame F in the press direction.

The mandrel drive device 35 is constructed by forming the inside of the main ram 39 into a mandrel cylinder 43, into which a mandrel piston 44 is fitted, and a mandrel 46 is attached to the mandrel piston 44 via a mandrel holder 45 using a screw structure or the like. The mandrel 46 is inserted into the pressurizing stem 41, and an engagement block 47A is provided behind the mandrel piston 44 via a tail rod 47, so that the tip of the mandrel 46 enters the die hole of the die 31 and is inserted between the two. The locking device 37 acts to restrain the relative advancement of the mandrel 46 by engaging the engagement block 47A with the stopper 48 at a position where an annular space is formed.

Furthermore, in FIG. 1, 49 indicates a container, which is slidable back and forth in the press direction via a container moving cylinder device 50, and the container 49 also has its holder 49A connected to the sliding guide device 4 shown in FIG.
2.

Reference numeral 51 denotes an intermediate frame, which is fitted onto the die stem 29 via a guide ring 52 and the like, and is movable in the longitudinal direction of the die stem via a cylinder device 53.
a shear device 55 operated by a cylinder device 54;
It is equipped with

A cleaning device 8 is attached to the extrusion press P having the above configuration.
1 and 2, a support stand 56 is removably provided on the column 28 on one side of the upper part.
A pivot arm 58 that pivots around a pivot 57 is provided on the support base 56, and a cleaning device 8 is attached to the tip of the pivot arm 58, and the cleaning device 8 is repositioned between the center of the press and a mutual position outside the press. In the embodiment, the movable drive body 59 is a cylinder 6 pivotally connected to a bracket 60 of the support base 56.
The piston end of a cylinder device consisting of a piston 62 and a piston 62 is pivotally connected to a swing arm 58.

In FIGS. 3 and 4, the extrusion tool 5 is the mandrel 4.
The cleaning device 8 for cleaning the tip 46A of the mandrel 46 is constructed as follows.

The grinder mounting body 10 is rotatably fitted into the bearing portion 16 of a swing arm 58 having a bearing portion 16 at the tip, a spur gear 17 is formed on the outer periphery of one side of the grinder mounting body 10, and a pinion 18 is attached to the spur gear 17. A driving body 20 of the grinder mounting body 10 is configured by engaging the pinion drive motor 19 and fixing the pinion drive motor 19 to the outer periphery of the bearing portion 16 . That is, when the drive motor 19 is started, the pinion 18
Through the occlusal movement of the gear 17, the grinder mounting body 10 is forcibly rotated around its axis.

The grinder device 12 is provided with a swinging arm 22 via an eccentric pivot 21 on the tool facing side of the mounting body 10, and a drive body (motor) 23 of the grinding section 11 is detachably mounted on the swinging arm 22. The grinding part 11 is configured to be forcibly rotatable around its axis.

The grinding part 11 is detachably attached to the output shaft of the drive body 23 and can be made eccentric with respect to the axes of the tool 5 and the attachment body 10 . Through the rotation of the grinding part 11, the grinding part 11 can freely move planetarily.

Further, a grinding section 11 and a driving body 23 are attached to the swing arm 22,
One end of the swinging arm 22 is pivoted to the grinder mounting body 10 via a pivot 21 so as to be swingable on a plane intersecting the rotation axis, and the other end of the swinging arm 22 is connected to a guide portion 24 provided on the mounting body 10. is engaged with.

Reference numeral 25 denotes a cylinder device, the tube side of which is pivotally connected to the mounting body 10, and the piston rod side of the cylinder device 25 to be pivotally connected to the swing arm 22. and the pressing force are adjustable.

Furthermore, a protrusion 14 having a flange is formed on the axis of the grinder mounting body 10 on the side opposite to the tool, one end of a relay arm 63 is fitted into this protrusion 14, and a pivoting arm 58
A piston rod end of a cylinder device 15 is attached to the extrusion tool 5, so that the grinding portion 11 can be freely moved toward and away from the extrusion tool 5 through the expansion and contraction movement of the cylinder device 15.

Next, the operation will be explained in relation to the press cycle.

In the embodiment shown in FIGS. 2 to 4, an annular space is formed between the die hole of the die 31 attached to the die stem 29 and the tip portion 46A of the mandrel 46, and the container 49 is inserted through this annular space. The charged billet is extruded, and after the extrusion is finished, the so-called pressed lees and the extruded product are passed through a shearing device 5.
After cutting and separating with 5 etc., mandrel chip 4
The shell attached to 6A is cleaned in the following manner.

With the container 49 placed in a position where it does not interfere with the rotation of the swing arm 58 (for example, as shown in FIG. 1), the mandrel 46 is brought out from the pressurizing stem 41 via its drive device 35 as shown in FIG. In the embodiment of the body 59, the pivot arm 58 is moved into the center of the press through an extension movement, the axis of the grinder mounting body 10 of the cleaning device 8 is positioned on the mandrel axis, and the axis of the grinder mounting body 10 of the cleaning device 8 is positioned on the mandrel axis, and through the contraction of the cylinder device 15, the pivot arm 58 is moved into the press center. The grinding portion 11 is superimposed on the outer peripheral area of the mandrel chip 46A in the axial direction.

Thereafter, with the outer periphery of the grinding part 11 pressed against the outer periphery of the mandrel chip 46A through the contraction operation of the cylinder device 25, the driver 2
0 and 23, the shell adhering to the mandrel chip 46A is ground and cleaned by the orbital rotation of the mounting body 10 and the planetary motion and rotation of the grinding section 11.

What is illustrated in FIG. 5 is a fixed die 31 for indirect extrusion in which an extrusion tool 5 is attached to a die stem 29, and in this case also, the die hole 3 of the die 31
1A is cleaned by entering the cleaning device 8, pressing the grinding part 11 against the die hole 31A, and its planetary motion and rotation. FIGS. 3 and 4 show the cleaning process. The target is different,
Since the basic configuration and operation are the same, common parts are indicated by common symbols. In the embodiment shown in FIG. 5, since the object is the die 31, the grinding section 11 is mounted toward the front of the extrusion press P. Therefore, in the case of a press that directly or indirectly extrudes hollow extruded products, by arranging the grinding parts 11 before and after the mounting body 10, even if the object to be cleaned is the die 31, the mandrel 46 can Even if there is a problem, it is possible to perform the function of cleaning both with one cleaning device 8.

Figure 6 shows an example applied to a direct extrusion press.
The die 31 is attached to the press platen 1 by a support device 28 consisting of a die backer 64, a receiving plate 65, a die stay 66, etc., and after extrusion is completed, the die hole is closed through the planetary movement and rotation of the grinding section 11 of the cleaning device 8. 31A is cleaned, and the basic configuration is the same as in FIGS. 3 and 4. Note that if the die 31 shown in FIG. 6 is alternately selected with the die stem 29 and alternatively mounted at the center of the press, a so-called straight and intermediate type press can be obtained.

In short, according to the present invention, the cleaning device 8 is attached to the extrusion press P, and furthermore,
Since the press center and the outside of the press can be moved freely, it is possible to effectively utilize the press cycle time and clean every few presses, resulting in a short cleaning cycle while maintaining the quality of the extruded product. It can be implemented in time.

Furthermore, in this case, the grinder mounting body 10 is rotatably provided around its axis at the tip of the swing arm 58 which can freely change its position between the center of the press and the outside of the press, and the mounting body 10 is attached to the swing arm 58. Cylinder device 1 that allows a rotating drive body 20 and a mounting body 10 to move freely in the axial direction relative to the extrusion tool 5
5 is provided so that the position of the axis of the grinder attachment body 10 can be freely changed between the press center of the extrusion press P and the outside of the press by the rotation movement of the rotation arm 58. While mutual interference with (for example, a container) can be avoided, the structure can be simplified by using the swing arm 58 also as a support or a fixture.

Furthermore, regardless of whether the extrusion tool 5 is a die or a mandrel, shells attached to the inner or outer circumferential surface of the extrusion tool 5 can be cleaned evenly and smoothly over the entire extrusion tool. Since the extrusion tool 5 moves in a planetary manner, even if the type of extrusion tool 5 changes, such as large, medium, or small, it can be cleaned while saving labor.

Further, the grinding section 11 is connected to the swing arm 2.
2, and the expansion and contraction of the cylinder device 25 allows the eccentricity and pressing force of the grinding section 11 to be adjusted via the swing arm 22, so that the contact pressure against the extrusion tool 5 can be adjusted appropriately. , there is an advantage that the centering of the grinding section 11 can be performed accurately.

Furthermore, when the grinding section 11 is centered on the extrusion tool 5 and the extrusion tool 5 is cleaned by its rotation and planetary motion, it is necessary to move the grinding section 11 and the extrusion tool 5 relative to each other in the axial direction. The movement is achieved by installing a cylinder device 15 on the rotating arm 58 and moving the grinder mounting body 10.
Since the cylinder device 15 is moved via the swivel arm 58, the cylinder device 15 can be made smaller compared to a system in which the entire swivel arm 58 is moved, and the structure of the swivel arm 58 can be simplified.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a side sectional view showing an example of the entire extrusion press equipment of the present invention, and FIG.
The figure is a cross-sectional view taken along line B-B in Figure 1, and Figure 3 is a cross-sectional view taken along line B-B in Figure 1.
Figure C-C line cross-sectional arrow enlarged view, Figure 4 is Figure 3D
5 is a sectional view showing another example of FIG. 4, and FIG. 6 is a sectional view for direct extrusion. 5... Extrusion tool, 8... Cleaning device, 10...
Grinder mounting body, 11... grinding part,
DESCRIPTION OF SYMBOLS 12... Grinder device, 23... Grinder drive body, 58... Swivel arm.

Claims (1)

[Claims] 1. Extrusion press equipment in which an extrusion press P is provided with a device 8 for cleaning the extrusion tool 5,
A cleaning device 8 is provided on a rotating arm 58 that can be freely changed in position between the center of the press and the outside of the press. 10 is provided, and the swing arm 58 is equipped with a driving body 20 that allows the grinder mounting body 10 to rotate freely, and a cylinder device 15 that allows the mounting body 10 to move freely in the axial direction with respect to the extrusion tool 5. , a grinder device 12 having a grinding section 11 provided on the side of the grinder mounting body 10 facing the extrusion tool and capable of planetary movement with respect to the mounting body 10; and the grinding section 11.
and a drive body 23 that rotates around its axis, and further includes a swing arm that swings on a plane intersecting the rotation axis of the attachment body 10 on the side of the grinder attachment body 10 facing the extrusion tool. 22 is provided, the swinging arm 22 is equipped with the grinding section 11 and the driving body 23, and one end of a cylinder device 25 for adjusting the eccentricity and pressing force of the grinding section 11 is attached to the grinder mounting body 10. The other end is pivotally supported by the swinging arm 22, and through the swinging movement of the swinging arm 58, the axis of the grinder mounting body 10 of the cleaning device 8 is moved between the press center of the extrusion press P and the outside of the press. An extrusion press equipment equipped with an extrusion tool cleaning device, characterized in that the position can be changed freely between positions.