JPS6192720A - Method and device for continuous indirect extrusion - Google Patents

Abstract

PURPOSE:To guarantee a continuous extrusion with shortening the whole length of a press equipment and to prevent the quality deterioration of the product surface due to a blister phenomenon by arranging a pressurizing stem with its position freely changeably or fixably between the press shaft core and the press outside. CONSTITUTION:The billet 33 inserted into the billet chamber of a container 12 is upset with deforming it from a die 14 side by pressing with a pressurizing stem 7 the container 12 together with a press board backer 8 with the condition of the die 14 of a die stem 15 being at one end of the container 12 and the press board backer 8 being fit to the other end face of the container 12. After the completion of said upsetting, the billet 33 is indirectly extruded via a die 14 with giving an extrusion force to the pressurizing stem 7 and the press refuse 35 which is at the rear end of the container 12 is moved to the front end part of the container 12. The stem 7 is moved in the right angled direction with the press axial core direction thereafter and with inserting a new billet 33 into the press shaft core, it is extruded after joining the press refuse 35 and new billet 33.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a continuous indirect extrusion method for extruding soft metal billets such as aluminum and aluminum alloys, and its equipment.

(Prior art) Since the extrusion process is originally a compression process, there is a limit to the length of the billet, and therefore the billet must undergo reciprocating motion for each push. However, it is possible to make the extrusion process continuous. This method is ideal for engineers who are interested in this method because of its advantages such as: - yield can be extremely high; - Discards for each bush do not occur and there is no need to handle them; It is also a goal.

In view of this point of view, the present applicant, for example,
As proposed in Publication No. 7781, a continuous indirect extrusion method was successfully developed and the above-mentioned ideals and goals were achieved, but although the proposed technology has certain advantages, it requires a special container.

In addition, the applicant has also proposed a method for improving the above-mentioned technology.
A continuous indirect extrusion press disclosed in Publication No. 7-37507 was proposed, in which an auxiliary container is provided, a part of the pressed lees is cut in the container to form a new surface, and a new billet is metal-bonded to this. It is.

(Problems to be Solved by the Invention) In any of the above-mentioned technologies, a special container is specially required, and the press shaft length of the entire equipment is larger than necessary, resulting in a reduction in press cycle time. There was one thing I disliked.

In addition, when using a double-stem type indirect extrusion press, the billet in the container is upset from both axial end faces through compression of both stems, so there is a gap between the inner surface of the container and the outer surface of the billet. As the billet yielding phenomenon starts from both ends of the billet, there is no place for the remaining air to escape, especially in the center, and this residual air causes a blister phenomenon on the surface of the extruded product, resulting in a decrease in the surface quality of the product. Invite.

The present invention solves the problems of the conventional technology by arranging the pressurizing stem so that its position can be changed and fixed between the press axis and the outside of the press, thereby ensuring continuous extrusion while shortening the overall length of the press equipment. Moreover, the purpose is to prevent deterioration of the surface quality of the product due to the blister phenomenon.

(Means for Solving the Problem) The technical means of the present invention is such that an analizing metem 7 and a die stem 15 are respectively arranged on the press axis with a container 12 provided so as to be movable and fixed freely in the press axis direction. , a continuous indirect extrusion method in which a billet 33 in a container 12 is extruded using indirect extrusion equipment in which an extrusion force generating device consisting of a main cylinder 1 and a main ram 2 is connected to the pressurizing stem 7. When the billet 33' inserted into the billet chamber is upset in the container 12, the die 14 of the die stem 15 is at one end of the container 12, and the pressing plate buffing force 8 is engaged with the other end surface of the container 12. The container 12 is pressed together with the press backer 8 by the pressure stem 7 to deform and upset the billet 33 from the die 14 side, and after this upsetting is completed, the pressure stem 7
The billet 33 is indirectly extruded through the die 14 by giving an extrusion force to move in the direction of the heart, and in the direction perpendicular to the
Insert a new billet 33 into the press axis, and press the pressed lees 35.
and the new billet 33 are joined together and then extruded.

In addition, another technical means of the present invention is that the pressurizing stem 7 and the die stem 15 are respectively arranged on the press axis with a container 12 provided so as to be reciprocally movable and fixed in the direction of the press axis. In an indirect extrusion facility in which an extrusion force generating device consisting of a ram 2 is connected to the pressurizing stem 7, a slide 6 attached to the base of the pressurizing stem 7 is mounted at the tip of the crosshead 5 at right angles to the press axis direction. The pressurizing stem 7 is fitted into a slide guide 2A formed in the direction of the slide guide 2A between the press axis and the outside of the press axis.
A lateral drive body 36 is provided for the pressurizing stem 7 which is slidably fixed via the presser stem 7, and a presser plate 9 is attached to the tip of the presser stem 7 via a presser plate backer 8. 9 is container 12
The press plate backer 8 is fitted into the billet chamber in a removable manner, and the press plate backer 8 has a larger shape than the billet chamber of the container 12 and can freely approach and separate from the end face of the container 12. A press platen driver 11 is built into the pressurizing stem 7 so that the presser platen driver 11 can freely reciprocate in the direction, and a presser platen backer driver 37 that allows the presser platen backer 8 to be freely inserted and removed between the presser plate 9 and the pressurizing stem 7.
A billet 33 is provided on the press axis of the main ram 2.
A billet pusher body 31 for charging the billet into the billet chamber of the container 12 is provided.

(Function) As shown in FIG. 1, the billet 33 inserted into the billet chamber of the container 12 is upset in the container 12, but at this time, the die 14 of the die stem 15
is located at one end of the container 12, the pusher 9 is located at the other end of the container 12, the pusher backer 8 is engaged with the other end surface of the container 12, and in this state the container 12 is pushed together with the pusher backer 8 by the pressurizing stem 7. By pressing with the billet 33
is deformed from the die 14 side, and the air is discharged from the side opposite to the die 14 to the outside of the container 12, where it is upset.

When the upset is completed, the main cylinder 1 is attached to the pressurizing stem 7.
By applying an extrusion force amount by an extrusion force generation device consisting of a main ram 2 and a main ram 2, the container 12 is
5, and the product is indirectly extruded through the die 14 as shown in FIG.

When the extrusion of one billet is completed, the presser buffing force 8 is engaged with the end face of the container 12, so the driver 37 shown in FIG. 12 is vibrated, and the presser backer 8 is moved as shown in FIG. It is evacuated as shown.

When the presser backer 8 is retracted, the container 12 is retracted via the container hydro coupling cylinder 19 and the container shift cylinder 23 as shown in FIG. Then, as shown in FIG. 5, by retracting the main ram 2, the pressurizing stem 7 is moved to the container 1.
This will be extracted from 2.

When the pressurizing stem 7 is pulled out from the container 12 due to the retreat of the main ram 2, the pressurizing stem 7 is repositioned outside the press as shown in FIGS. 6 and 7 through the extension action of its driver 36. As a result, a billet charging space is created between the container 12 and the crosshead 5.

In this state, the billet 33 is carried onto the press axis via the billet loader 32 as shown in FIG. 8, and by extending the billet pusher device 31, a new billet 33 is inserted into the container 12 as shown in FIG. will be done.

When this new billet 33 is inserted into the container 12, the pressurizing stem 7 is moved onto the press axis, and
By inserting the press platen backer 8 between the press plate 9 and the pressure stem 7 and upsetting it as shown in FIG.
The pressed lees 35 and the new billet 33 are joined, and continuous indirect extrusion is performed here.

(Example) Embodiments of the present invention will be described in detail with reference to the drawings.

The opposing frames 17 and the main cylinder frame 17A, which are erected to face each other, are connected by diagonally arranged columns 18 to form a press frame having a rigid frame structure.

The main cylinder frame 17A is provided with a pushing force generating device, and the generating device is composed of a main cylinder 1 and a main ram 2 fitted therewith.

The tip of the main ram 2 is a crosshead 5, and the crosshead 5 has a slide guide 2A extending in a direction perpendicular to the press axis direction.
A pressure stem slide 6 is slidably fitted into the guide 28.

Further, the pressure stem slide 6 is located at the base of the pressure stem 7, and therefore, the pressure stem 7 can be freely changed in position between the press axis and the outside of the press along the guide 2A via the slide 6. In FIG. 7, by providing a lateral drive body 36 for the pressurizing stem 7', which is exemplified by a telescoping cylinder mechanism, outside the press, the pressurizing stem 7 is aligned with the press axis through the expansion and contraction of the drive body 36. The position can be freely changed between the press and the outside of the press.

A container device is provided between the opposing frame 17 and the main cylinder frame 17, and the container device includes a container 12 having a billet storage chamber and a container 12 having a billet storage chamber.
A container holder 13 is fitted onto the container holder 13, and a container moving cylinder mechanism and a container hydro-coupling cylinder mechanism are connected to the container device.

The container moving cylinder mechanism consists of a shift cylinder 23 attached to one side of the opposing frame 17 and a piston rod 24 having a piston fitted into the cylinder 23. The end of the piston rod 24 is connected to the container holder 1.
3, and the container 12 can be shifted by sending hydraulic pressure to oil chambers 25 and 26 shown in FIG. 1, respectively.

The container hydro coupling cylinder mechanism includes a cylinder 19 attached to the crosshead 5 side and the cylinder 1.
It consists of a piston rod 20 having a piston fitted to form an oil chamber 2L22 at the end of the rod 20, and the end of the rod 20 is connected to the container holder 13.

A die stem 15 having a die 14 is attached to the opposing frame 17 on the extrusion direction side via a guide slide 16, and a pressurizing stem 7 and a die stem 15 are attached to this with the container 12 in between, respectively, on the press axis. It is located.

A press plate 9 and a press plate backer 8 are attached to the tip of the pressurizing stem 7, and the press plate 9 serves as a insertion/extraction mark for the billet chamber of the container 12, and the press plate backer 8 has an outer diameter larger than that of the billet chamber. It is said that it can freely approach and separate from the rear surface of the container 12.

That is, as shown in FIG. 12, in the pusher backer 8, an arm 37A provided with a U-shaped holding portion is swingably supported via a pivot 37B, and the arm 37A is supported by a cylinder 37C using the pivot 37B as a fulcrum. A swingable drive body 37 allows the position to be changed between the press axis and the outside of the press.

In addition to the rocking type (swing type) shown in the figure, a lift type, slide type, etc. can be used as means for making the press platen backer 8 freely changeable in position between the press axis and the outside of the press. .

In this example, the press plate backer 8 can be inserted and removed freely between the tip of the pressurizing stem 7 and the press plate 9 through a swing motion, but in order to ensure this insertion and removal, the press plate 9 is placed on the axis of the press. It is said that it can freely move back and forth in the direction of the press axis.

That is, the guide rod 10 connected to the pressing plate 9 is connected to the pressurizing stem 7.
The slide 6 is inserted into a cylindrical hole, and is connected to a cylindrical press drive body 11 formed within the slide 6.

Therefore, the press platen 9 is removably inserted into the billet chamber of the container 12 through the expansion and contraction movement of the press plate driving body 11, and by increasing or decreasing the distance from the pressurizing stem 7, the press platen The backer 8 is designed to be freely insertable and removable.

Further, on the press axis of the main ram 2, there is a billet pusher body 3 for charging the billet 33 into the pellet chamber of the container 12.
1 is provided, and the bushing body 31 consists of a cylinder part and a piston rod, and the button body 31 is provided in the retraction space of the pressurizing stem 7 which is retracted from the press axis to the outside of the press as shown in FIG. After loading the billet 33 onto the press axis via the billet loader 32 as shown in FIG. 9, the billet 33 is
After the billet 33 has been supplied in this way, steps such as shrinking and retracting the bushing body 31, returning the pressurizing stem 7 to the press axis, and inserting the press backer 8 are performed. After going through the process shown in Fig. 10, the billet 33 is subjected to an abseto process, etc., and the pressed lees 35 and the billet 33 are
In this way, the extruded product 34 is continuously extruded.

Additionally, in the figure, 29 indicates a vertical shear for indirect extrusion, which is attached to the container holder 13.

30 indicates a vertical shear for direct extrusion, which is attached to the opposing frame 17.

In either vertical shear 29 or 30, the shear can be freely moved in a direction perpendicular to the press axis through the expansion and contraction movement of the cylinder.

27 is a container stop cylinder, and 28 is a container stop piston rond.

(Effects of the Invention) In short, in the present invention, the pressurizing stem 7 and the die stem 15 are respectively arranged on the press axis, with the container 12 provided so as to be movable and fixed freely in the press axis direction, sandwiching the pressurizing stem 7 and the die stem 15.
In a continuous indirect extrusion method in which a billet 33 in a container 12 is extruded using indirect extrusion equipment in which an extrusion force generating device consisting of a main cylinder 1 and a main ram 2 is connected to the pressurizing stem 7, the billet 33 in the container 12 is When the billet 33 inserted into the chamber is absented in the container 12, the die 14 of the die stem 15 is located at one end of the container 12, the pusher backer 8 is engaged with the other end surface of the container 12, and the container 12 is held in this state. The billet 33 is pressed by the pressure stem 7 together with the press backer 8 to deform and upset the billet 33 from the die 14 side, and after the upsetting is completed, an extrusion force is applied to the pressure stem 7 to push the billet 33 through the die 14.
is indirectly extruded, and after the extrusion is finished, the pressed lees 35 at the rear end of the container 12 are moved to the front end of the container 12, and then,
Moving the pressurizing stem 7 in a direction perpendicular to the press axis direction,
Insert a new billet 33 into the press axis, and press the pressed lees 35.
The billet 33 of the container 12 is upset by being deformed from the die 14 side, so there is no blister phenomenon due to residual air, resulting in a high-quality extruded product. can be obtained. Furthermore, since the pressed lees 35 and the new billet 33 are metal-bonded, the press cycle time can be significantly shortened.

Furthermore, in the present invention, the pressurizing stem 7 and the die stem 15 are respectively arranged on the press axis with the container 12 provided so as to be reciprocatingly movable and fixed in the press axis direction, and the main cylinder 1 and the main ram 2 are arranged. In indirect extrusion equipment in which an extrusion force generating device is connected to the pressure stem 7, a slide 6 attached to the base of the pressure stem 7 is formed at the tip of the cross rod 5 in a direction perpendicular to the press axis direction. The pressurizing stem 7 is fitted into the slide guide 2A between the press axis center and the press axis outside the press axis center.
A lateral driver 36 of the pressure stem 7 is provided to allow the pressure stem 7 to slide and be fixed freely through the pressure stem 7, and a push plate 9 is attached to the tip of the pressure stem 7 via a press plate backer 8. container 12
The press platen backer 8 has a larger shape than the billet chamber of the container 12 and can freely approach and separate from the end face of the container 12. A press plate drive body 11 that allows the press plate to move freely back and forth is built into the pressure stem 7, and a press plate backer drive body 37 that allows the press plate backer 8 to be freely inserted and removed between the press plate 9 and the pressure stem 7 is provided. The main ram 2 is provided with a billet pusher body 31 on the press axis for charging the billet 33 into the billet chamber of the container 12, so it has the following advantages. .

In contrast to indirect extrusion presses, which normally cut the lees after each batch, the present invention enables continuous extrusion, which improves the yield of extruded products 34 and shortens cycle time, thereby significantly improving productivity. It has a positive effect. 'Then, the pressurizing stem 7 is made movable between the press axis and the outside of the press by the driver 36, and the billet 33 is supplied using the space formed by the retreat of the pressurizing stem 7, Since the container 12 is inserted using the bushing body 31, there is no need for a specially shaped container as in conventional continuous extrusion presses, and the press can be structurally simple.

Furthermore, by making the pressurizing stem 7 retractable and providing the pusher body 31, the entire length of the press can be made compact. During the process, billet 3
The deformation of step 3 can be performed from one end side, which has the advantage that no air remains and no blister phenomenon occurs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention in the order of the pressing process, with Fig. 1 being a side sectional view before upsetting, Fig. 2 being a side sectional view just before extrusion is completed, and Fig. 3 being a side sectional view after the presser bunker has been retracted. Figure 4 is a side sectional view of the container retracting, Figure 5 is a side sectional view of the main ram retracting, Figure 6 is a side sectional view of the outside of the pressure stem press, and Figure 7 is the arrow C-C in Figure 6. FIG. 8 is a side sectional view of billet supply, FIG. 9 is a side sectional view of billet insertion, FIG. 10 is a side sectional view of pressure stem press center return and presser backer insertion, and FIG. 11 is a side sectional view of billet supply. is a diagram taken along the line C-C in FIG. 6, and FIG. 12 is a view taken along the line C-C in FIG. 6. DESCRIPTION OF SYMBOLS 1...Main cylinder, 2...Main ram, 5...Cross head, 6...Pressure stem slide, 7...Pressure stem, 8...Press plate backer, 9... Press board, 11...
Push plate drive body, 12... Container, 15... Die stem, 17... Opposing frame, 17A... Main cylinder frame, 31... Billet pusher body 1.36...
- Pressure stem drive body, 37... Pressing plate backer drive body.

Claims (1)

[Claims] 1. A pressurizing stem 7 and a die stem 15 are respectively arranged on the press axis with a container 12 provided so as to be reciprocally movable and fixed in the press axis direction, and a main cylinder 1 and a main ram 2 In a continuous indirect extrusion method in which a billet 33 in a container 12 is extruded using indirect extrusion equipment in which an extrusion force generation device is connected to the pressure stem 7, the billet 33 inserted into the billet chamber of the container 12 is To upset the inside of the container 12, the die 14 of the die stem 15 is located at one end of the container 12, the presser backer 8 is engaged with the other end surface of the container 12, and in this state, the container 12 is pressurized together with the presser backer 8. The billet 33 is pressed by the stem 7 to deform and upset from the die 14 side, and after the upsetting is completed, an extrusion force is applied to the pressure stem 7 to indirectly extrude the billet 33 through the die 14, and after the extrusion is completed, the billet 33 is The pressed lees 35 at the rear end of the container 12 are moved to the front end of the container 12, and then the pressure stem 7 is moved in a direction perpendicular to the press axis, and a new billet 33 is inserted into the press axis. A continuous indirect extrusion method characterized by extruding after joining the lees 35 and the new billet 33. 2. A pressurizing stem 7 and a die stem 15 are respectively arranged on the press axis, sandwiching a container 12 which is provided so as to be reciprocally movable and fixed in the direction of the press axis, and the main cylinder 1 and the main ram 2 generate an extrusion force. In an indirect extrusion facility in which a device is connected to the pressurizing stem 7, a slide 6 attached to the base of the pressurizing stem 7 is a slide guide 2A formed at the tip of the crosshead 5 in a direction perpendicular to the press axis direction. The pressurizing stem 7 is fitted onto the slide guide 2A between the press axis and the press axis.
A lateral driver 36 of the pressure stem 7 is provided to allow the pressure stem 7 to slide and be fixed freely through the pressure stem 7, and a push plate 9 is attached to the tip of the pressure stem 7 via a press plate backer 8. container 12
The press platen backer 8 has a larger shape than the billet chamber of the container 12 and can freely approach and separate from the end surface of the container 12. A press plate drive body 11 that allows the press plate to move freely back and forth is built into the pressure stem 7, and a press plate backer drive body 37 that allows the press plate backer 8 to be freely inserted and removed between the press plate 9 and the pressure stem 7 is provided. A continuous indirect extrusion device characterized in that a billet pusher body 31 is provided on the press axis of the main ram 2 for charging a billet 33 into a billet chamber of a container 12.