JPS5847925B2 - Extrusion press for both direct and indirect extrusion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal extrusion press that can perform both direct and indirect extrusion presses, and allows tools necessary for extrusion to be easily replaced outside the press, as well as allowing products and disks to be exchanged after extrusion is completed. The purpose is to allow only a single shear device to separate and cut the cards.

An indirect extrusion press that can also be used as a direct extrusion press, but which does not allow the die stem and die stem holder to move in and out of the press through the press platen, removes the press plate and die card remaining in the container after extrusion is finished, and moves the die stem and die stem holder to the rear of the container. It can only be taken out.

Therefore, if this type of indirect extrusion press is also used as a direct extrusion press, the product and disk card can only be cut near the press platen with the direct extrusion press.
It is necessary to install shear devices 2 meters in front and behind the container, which requires a large amount of equipment costs, and leads to a complicated structure and press cycle.

This invention solves the above problems and deficiencies, and
The purpose of this project is to provide a metal extrusion press that allows easy replacement of necessary tools for both direct and indirect extrusion, and that maintains precision of the die stem during indirect extrusion.
Specific examples of the present invention will be described in detail with reference to the drawings.

In Figures 1 and 2, 1 is a press platen;
A through hole 2 is provided at the center of the press.

Reference numeral 3 denotes a main cylinder frame, which is installed facing the platen 1 at a distance, and is firmly fastened by a plurality of columns 4 arranged diagonally.

The press platen 1 and the main cylinder frame 3 are rigidly connected by a column 4, thereby forming a press frame of a rigid frame structure.

The platen and frame described above are installed on the press bed 5 so as to face each other back and forth.

In order to make the explanation easier to understand, the following description will be made assuming that the pressing direction is forward and the opposite direction is backward.

A die stem guide body 6 is fixed to the rear end surface of the press platen 1, and a guide portion 7 in a direction perpendicular to the press direction is formed inside the die stem guide body as a protrusion rail in the figure.

8 is a long cylindrical die stem, and a die stem guide body 6
In the figure, a concave circumferential groove 10 is formed in the die stem slide 9 so that the die stem slide 9 is fitted onto the die stem slide 9 and is attached by a cock or the like (not shown) and moved along the guide portion 6.

This die stem 8 is fitted into a die stem slide 9,
It extends rearward from the center of the press, and a die 12 is attached to the free end via a guide holder 11.

Reference numeral 13 denotes a die stem clamp, which is equipped with an engaging protrusion 14 that fits into the concave circumferential groove 10 of the die stem slide 9, and which is attached to the rear end surface of the press platen 1 by the cooperation of a tension bolt 15 and a hydraulic jack (not shown). 8 is movable and fixed to the press platen 1.

That is, the die stem clamp 13 is tightened by the tension bolt 15.
is fastened to the press platen 1 to clamp the die stem 8, and the clamp can be released by applying a hydraulic jack (not shown) to extend the tension bolt 15.

In FIG. 10, 16 is a die stem drive means, and although only the piston rod is shown in the figure, it is provided on the side of the press platen 1 via a cylinder support, and the end of the piston rod 17 is connected to the die stem slide 9.
It has been concluded.

In the figure, the contracting action of the piston rod 17 moves the die stem 8 from the center of the press to the outside of the press, and the extension action of the piston rod 11 allows the die stem 8 to be moved from outside the press to the center of the press.

In the specific example, a tiger 718 is provided to be located at the center of the press when the die stem 8 is located outside the press.

Reference numeral 19 denotes an intermediate frame, which has a ring shape capable of surrounding the die stem 8 located at the center of the press, and is equipped with a pair of slide shoes 20 at the lower left and right sides as shown in FIG. 21 so that it can be moved freely in the press direction.

Reference numeral 22 denotes an intermediate frame moving drive means, which in the figure is made up of a cylinder 23 attached to the press platen 1 and a piston rod 24 fitted into the cylinder 23 to extend and contract.
As shown in FIG. 2, the piston rod 24 is connected to the intermediate frame 1.
It is connected to the arm 25 of 9.

Note that this drive stage 22 extends and contracts the intermediate frame 19 within a range exceeding the length of the die stem 8 in the longitudinal direction.

Reference numeral 26 denotes a movable frame, which is provided inside the rear surface of the intermediate frame 19 so as to be freely slidable in the radial direction.
7 is fitted into the guide 28 of the intermediate frame 190, and an arm 29 integral with the guide 27 extends radially outward as shown in the second figure.

A U-shaped mounting fitting portion 30 is formed on the block-shaped guide 27 as shown in the second figure.
A die stem guide ring 31 is removably fitted to the die stem guide ring 31 .

Note that the outer peripheral surface of the guide ring 31 and the inner peripheral surface of the attachment fitting part 30 are fitted with a concavo-convex engaging part 32 as shown in the first figure.

Reference numeral 33 denotes a driving means for the movable frame 1, and in the figure, it consists of a cylinder 34 attached radially to the intermediate frame 19, a piston rod 35 that is extendable and retractable to this cylinder 34, and whose end is attached to the arm 29, and a guide ring of the movable frame 26. 31 is moved in a direction perpendicular to the press direction between the center of the 7"L/space and the outside of the press.

Reference numeral 36 denotes a shear device, which is attached to the intermediate frame 19 via a shear frame structure 37.

The shear device 36 includes a drive section 38 having a hydraulic cylinder structure and a shear 40 fitted into a guide tube 39 formed on a shear frame 37. The shear 40 moves along the rear end surface of the intermediate frame 19 in the press direction It is said to be able to freely move forward and backward in the right angle direction to a position beyond the center of the press.

41 is a main cylinder, into which a main ram 42 is fitted.

The main cylinder 41 projects forward from the main cylinder frame 3, and a main crosshead 4 is provided at the front end of the main ram 42.
3 are integrally formed.

Reference numeral 44 denotes a pressure stem, which is integrally formed at the center of the main crosshead 43, and has a pressing plate 4 at the front end of the stem 44.
5 is installed.

A container 46 has a billet receiving hole 47 at the center of the press, and is connected to the main crosshead 43 via a container holder 48.
and the press platen 1 so as to be able to freely move forward and backward in the press direction.

49 is a container moving cylinder, and the main cylinder frame 3
The end of a piston rod 51 is connected to a container moving frame 50.

The container moving frame 50 is located between the main cylinder frame 3 and the crosshead 43, and the container moving frame 50 and the container holder 48 are connected by a plurality of tie rods 5.
Connected by 2.

A side cylinder 53 is provided between the main cylinder frame 3 and the crosshead 43.

Reference numeral 54 denotes a cylinder device for hydraulic coupling, the cylinder 55 of which is fixed to the container moving frame 50, extends rearward and is fitted into the main cylinder frame 3 so as to be freely removable, and the end of the piston rod 56 is connected to the rear of the main crosshead 43. It can come into contact with the end face.

A mandrel piston 57 is fitted into the main ram 42, and a mandrel 59 is connected to the pressurizing stem 4 via a holder 58.
It is inserted into 4.

60 is a mandrel locking device, and the tail rod 61
The tail block 62 is mechanically locked to front and rear stoppers 63 and 64 protruding from the main cylinder frame 3.

In the extrusion equipment having the above configuration, an overview of the press cycle for indirect extrusion of hollow extruded products will be explained with reference to FIGS. 3 to 8, and then an example in which this press is also used as a direct extrusion press will be described in detail.

3 and 4 show the billet supply and loading process. A billet loader 65 is provided at the rear of the container 46 and rotates between the center of the press and the outside of the press. First, the container is moved as shown in FIG. The cylinder 49 is extended to move the container 46 forward so as to cover the die stem 8,
When the press plate 45 and the press plate A are placed on the billet loader 65 and the billet loader 65 is turned toward the center of the press, it assumes the position shown in FIG. 3.

Thereafter, when the container 46 is moved backward, the press plate 45 comes into contact with the pressure stem 44 as shown in FIG. 4, and the billet A is gradually inserted into the billet receiving hole 47 of the container 46.

After completely inserting the billet A, the pressurizing stem 44 is moved forward to absorb the billet A and fill the billet receiving hole 47, and at the same time, sends pressure oil to the mandrel piston 57 shown in FIG. Then, move the mandrel 59 forward and pierce billet A here.

The middle of this piercing process is shown in FIG. 5, in which the mandrel 59 is locked at a predetermined position with the tip of the mandrel 59 facing the die hole of the die stem 8 using a locking stage 60.

After that, the pressurizing stem 44 and the container 46 are advanced together. In this case, if so-called indirect extrusion is performed in which there is no relative displacement between the container 46 and the billet A therein, a hollow extruded product is produced. B passes through the die stem 8 and is extruded forward from the through hole 2 as shown in FIG.

During this extrusion, the amount of extrusion force from the pressurizing stem 44 is applied to the die stem 8, but since the die stem 8 is held at its longitudinal center by the guide ring 31 of the intermediate frame 19, the amount of extrusion force is based on the amount of extrusion force. Inaccuracy of the die stem 8 is reliably prevented.

When the extrusion is finished, it is necessary to cut the disk A1 and the product B, but this is done by retracting the container 46 after the extrusion is finished (the middle part is shown in Fig. 7) and moving the container 46 back as shown in Fig. 8. After protruding the press plate 45 together with the taste card A1 in front of the intermediate frame 19, the intermediate frame 19 is moved rearward through the extension of its driving means 22, and the rear surface of the guide ring 31 of the intermediate frame 19 and the rear end surface of the die holder 12 are moved. After doing the same, the drive section 38 of the shear device 36
When it is extended, the shear 40 advances toward the center of the press, and the disk card A1 with the press plate 44 attached is transferred to the product B.
and are separated by cutting.

At this time, a large bending moment acts on the die stem 8, but the die stem 8
Since the die stem 8 is held by the guide ring 31 of No. 9, the die stem 8 does not lose its accuracy.

Thereafter, the press cycle ends when each member returns to its original position.

FIG. 9 shows the state shown in FIG. 8 when the indirect extrusion press shown in FIG. 1 is assembled into a direct extrusion press. Then, from the state where the shear 40 is outside the press, the intermediate frame 10 is further retreated by its drive stage 22, in short, the die stem 8 is brought into a position in which it can be moved laterally.

Then, when the hydraulic jack of the die stem clamp 13 is extended, the tension bolt 15 is extended, the fixation of the die stem 8 is released, and the die stem driving means 16 is retracted, the stem 8 is moved to the guide portion 7 of the die stem guide body 6. is guided by the center of the press and moved out of the press.

After the die stem 8 is moved out of the press, the attaching portion of the die stem 8 is removed, and instead of it, the die stem 8 is replaced with a direct extrusion press's guide bolster 66.

On the other hand, the movable frame 26 provided on the intermediate frame 19
The guide ring 31 is moved from the press center to the outside of the press through the extension of the drive stage 33, the guide ring 31 is removed from the fitting part 30, and the die 67 and die backer 69 are replaced for direct extrusion. Built-in Gui holder 6
8 is also attached to the fitting part 30 outside the press.

After replacing the tools necessary for direct extrusion in this way, the die bolster 66 is moved along the guide part 7 to the center of the press by extension of the drive means 16, and the bolster 66 is connected to the tension bolt 15 and hydraulic pressure at the center of the press. The movable frame 26 is firmly attached to the press platen 1 with the cooperation of the jack, and the movable frame 26 is positioned so that the gouger holder 68 incorporating the die 67 and the die bar sock 69 can be moved to the center of the press by reducing the drive stage 33. When the intermediate frame 19 is advanced through the reduction of its first drive means 22, the tools necessary for extrusion are set directly at the center of the press, as shown in FIG. If the container 46 is advanced until it comes into contact with the rear surface of the intermediate frame 19, a ready position for direct extrusion is obtained, and the container 46
Insert the billet into the pressure stem 44 and mandrel 59.
With the cooperation of the above, hollow extruded products are extruded by direct extrusion.

In the case of direct extrusion, the mandrel 59 is fixed at an accurate position by adjusting the tail block 62 of the locking stage 60.

After the direct extrusion is completed, the container 46 is moved back, and then the shear 40 moves toward the center of the ares, and the product is separated from the disk card with the press plate 45 attached thereto.

In the specific example shown in FIG. 11, a seven-year ring 70 is attached to the fitting portion 30 of the movable frame 26, so that the disc card and the product can be separated by this shear link '70.

The driving of this so-called slide shear means is as shown in FIG. The disk card and product can be separated by extending the cylinder.

Furthermore, in the specific example shown in Fig. 11, a specific example in which this is also used for direct extrusion is shown in Fig. 12, and in this Fig. 12, the tools necessary for direct extrusion are replaced in the same manner as described above. .

It is clear that in both embodiments, the conversion from direct extrusion to indirect extrusion is also performed outside the press.

This invention is as described above, and has the advantages that it can be easily replaced with a direct extrusion type by replacing a few attachments, and that the tools can be replaced outside the press, providing ample replacement work space. There is.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing a basic example of the present invention, and FIG.
3 to 8 show an example of the press operation cycle, FIG. 3 is during billet feeding, FIG. 4 is during billet insertion, and FIG. 5 is fillet abset and piercing. Fig. 6 shows the process of indirect extrusion of a hollow material using a mandrel, Fig. 7 shows the finished state of indirect extrusion, Fig. 8 is a cross-sectional view showing the disk card protrusion and shaft position, and Fig. 9 shows the press of Fig. 1. Figure 10 is a side sectional view of the main parts of the direct extrusion press, and Figure 10 is a cross-sectional schematic plan view of the tool exchange procedure.
FIG. 1 is a side sectional view of the main part showing another example of the present invention in a slide shear type, and FIG. 12 is a side sectional view of the main part in which the press of FIG. 11 is also used for direct extrusion. 1... Press platen, 6... Die stem guide body, 7... Guide part, 8...
・Die stem, 13...Die stem clamp,
16... 8 driving means, 19... intermediate frame, 22... 19 driving means, 26...
...Moving frame, 31...Guide ring, 33...26 driving means, 36...
・Shear device, 44... Pressure stem, 46...
····container.

Claims (1)

[Claims] 1. A die stem guide body fixed to the rear end surface of the press platen and having a guide part in a direction perpendicular to the press platen; The die stem guide body is fitted into this guide body so as to be movable and fixed, and is connected to the press center of the press platen through the die stem clamp. a die stem; a drive means for unclamping the die stem and moving the stem between the center of the press and outside the press; an intermediate frame that is movable in the press direction within a range exceeding the vertical length; a shear device that is provided on the intermediate frame and that is movable in a direction perpendicular to the press direction toward the center of the press; a moving frame provided with a die stem guide ring which is movable in the direction and which is detachable; and a driving means for moving the moving frame between the press center and the outside of the press in a direction perpendicular to the press direction. , an extrusion press for both direct and indirect extrusion.