JPS6341650B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention is for extrusion molding of aluminum and its alloys, copper and its alloys, etc., by cutting a long ingot after casting into predetermined dimensions to form a fixed-length billet. The present invention relates to a method and apparatus for producing billets for extruded shapes that utilize residual billets that ultimately remain during the process of forming billets.

BACKGROUND ART It is known that when extruding aluminum and its alloys or copper and its alloys, a long ingot is made, cut into predetermined dimensions to form a fixed-length billet, and then extrusion molded. At this time, the remaining billet, which is less than the standard length, is integrally joined to the front end of the next long ingot by welding, etc., and then this ingot is sequentially cut into the specified dimensions from the front end side, and this is placed in an extrusion press. A method of supplying is being used.

In the conventional method described above, each time a long ingot is cut, a fixed-length billet including joints by welding etc. is produced, and this billet is used by mixing it with a normal fixed-length billet that does not include joints. It turns out.

By the way, the cross section of the extrusion molded material is shown in Figure 2A.
When extruding solid type items such as
An apparatus having a structure as shown in FIG. 4 in longitudinal section is used. That is, a billet 5 cut to a regular length is charged into a container 15 with a solid die 17 attached to its tip, a dummy block 19 is placed on the rear end, and the billet 5 is cut to a regular length by a stem 20 of a hydraulic machine. When extruding 5, the metal becomes solid die 1
It is plastically deformed into a shape corresponding to the hole 7 and extruded into a shape 16, for example, a shape having the cross section shown in FIG. 2A.

Separately, when extruding a hollow type material whose cross section is shown in FIG. 2B, an apparatus having a structure whose vertical cross section is shown in FIG. 5 is used. That is, a billet 5 of a fixed length is charged into a container 15 equipped with a hollow die 22 (FIG. 6 is a plan view thereof) having a neck 21 at the tip, and the rear end is opened in the same manner as the apparatus shown in FIG. When the dummy block 19 is applied to the dummy block 19 and the fixed length billet 5 is extruded by the stem 20 of the extrusion device, the metal is transferred to the hollow die 2.
It is plastically deformed into a shape corresponding to the holes 2 and extruded into a shape 16, for example, a shape having the cross section shown in FIG. 2B.

Problems to be Solved by the Invention The extrusion apparatus for any of the above-mentioned shapes has a container 15.
There is a difference between the inner circumferential wall surface of the hole of the solid die 17 or the inner circumferential wall surface of the hole of the hollow die 22. In general, the difference a between the inner circumferential wall surface of the hollow die 22 and the inner circumferential wall surface of the container 15 is the difference a between the inner circumferential surface of the solid type die 17 without the neck and the inner circumferential surface of the container 15 because the neck portion 21 of the hollow die is provided. It is smaller than the difference a from the surface.

By the way, when the billet is extruded, inclusions such as oxides on the surface of the billet or gas inside the billet remain as a butt 23 at the corner formed by the vertical surface of the die and the inner wall surface of the container.

The larger the difference a between the inner circumferential surface of the die and the inner circumferential surface of the container in the extrusion apparatus is, the larger the amount of inclusions left as the butts 23 is. If the amount of inclusions contained in the billet exceeds the amount that can remain, the butt 23 will be caught in the extruded shape product, resulting in a defective product.

In the above conventional technology, as shown in FIG. 3, a fixed-length billet having a portion where residual billets are joined, that is, a fixed-length billet with many inclusions 24, must necessarily be used in combination with a billet with few inclusions. When extruding hollow-type shapes using equipment with a small a, it was inevitable that some products would be defective.

This invention has an extrusion device with a large a.
By differentiating the billets for each type of billet with a small a, charging a fixed-length billet with a joint to a device with a large a, and charging a fixed-length billet without a joint to a device with a small a. The purpose is to reduce the occurrence of defective products due to butt entrapment.

Means for Solving the Problems In order to achieve the above object, the present invention has the following configuration.

(1) In a method of manufacturing a fixed-length billet for extrusion by sequentially cutting a long ingot into predetermined dimensions, (a) cutting the remaining billets produced by cutting the long ingot from the long ingot; The process of integrally joining the cut and formed fixed-length billets by welding or the like at a point outside the feed line to create a jointed ingot, and storing this; (b) The inner peripheral surface of the die in the extrusion device and the container. When operating a device in which the difference a between the ingot and the inner circumferential surface is large, the feed for cutting the long ingot is stopped, and the bonded ingot is fed into the long ingot cutting device, which is sequentially cut into a predetermined size. 1. A method for producing a billet for an extruded shape material, comprising the steps of: preparing a billet of fixed length by cutting the billet from a long ingot, placing the billet on a feed line for the billet of fixed length cut from a long ingot, and sending the billet to an extrusion device.

(2)(a) A first line equipped with a cutting machine for making fixed-length billets from long ingots and a device for sending the billets to an extrusion process; (b) A line between the remaining billets produced by cutting the long billets. a second line for storing the bonded ingots; (c) stopping the feeding of long ingots from the first line and transferring the bonded ingots to the first line via a bypass path; A billet manufacturing device for extruded shapes, which is equipped with a bypass line that feeds into the cutting machine.

That is, the present invention creates a bonded ingot by integrally bonding the remaining billets at a point outside the feeding line of a fixed-length billet cut from a long ingot, and stores the bonded ingot to form a solid type billet. When using an extrusion device that has a sufficient material or a dimension, the feeding and cutting of the long ingot is stopped, and the bonded ingot is fed into a cutting machine, which is sequentially cut into a predetermined size to form a fixed-length billet. By molding the product and feeding it into an extrusion press, it is possible to prevent the production of defective products.

Although the length of the residual billet is shorter than that of a regular billet, in consideration of ease of handling during transport and joining, it is more convenient to handle it as a residual billet while it is longer than a regular billet. Furthermore, welding, friction welding, etc. can be employed as a means for joining the remaining billets. Furthermore, the length of the bonded ingot is
The length may be approximately the length of a long ingot, or shorter depending on the width of the storage section.

The present invention will be specifically described below with reference to the drawings.

FIG. 1 is an overall plan view of an example of the apparatus of the present invention, which includes a storage section for storing long ingots 1 having a length of 5 to 9 m, a conveyor 2 for transporting ingots in the direction of a cutting machine 3, and a cutting machine. 3 and a direction changer 6 for changing the direction of the fixed length billet.
Welding machine 1 for joining lines and residual billets
0, a second line with a storage section 12 for storing the bonded ingots 11, and a bypass line with a bypass conveyor 25 for conveying the bonded ingots 11 to the head of the conveyor 2.

Although the method of the present invention is carried out by this device,
The long ingot 1 is placed on the conveyor 2 from the storage section and sent in the direction of the cutting machine 3 (a hot shear may be used), and when it stops at the stopper 4, the cutting machine 3
The billets 5 are cut into regular billets 5 with a length of 400 to 900 mm. This fixed-length billet 5 is fed into a direction changing machine 6 having a lifter function, and the billet is changed in direction and sent to a conveyor 18 connected to an extruder.

In this way, several regular length billets are cut out from the long ingot 1 and the remaining half billets are sent to the joining machine 10 as residual billets. For the remaining billet, move the first remaining billet to the first stopper 8.
Then, the second residual billet is brought into contact with this and welded, and this is moved to the second stopper 9, and the third residual billet is further brought into contact and welded. Alternatively, the first remaining billet may be stopped by the second stopper 9, and the second and third remaining billets may be brought into contact with and welded to this remaining billet. The bonded ingot 11 is fed into a storage section 12 and stored therein.

When the extruder allows the use of bonded ingots, the loading of the long ingots 1 on the conveyor 2 is stopped and the lifter 1 at the end of the storage section 12 is moved.
3. Place the bonded ingot 11 on the bypass conveyor 25 via the lifter 14 and send it to the head of the conveyor 2.

Here, the bonded ingot 11 is placed on the top of the conveyor 2, and a fixed-length billet 5 is cut out in the same process as previously explained for cutting the long ingot, and fed into the extruder.

In this way, the entire ingot can be used effectively.

Effects of the Invention As explained above, according to the present invention, the extrusion of defective products is prevented, and the long ingots as raw materials are fully utilized, so the manufacturing cost is reduced compared to the conventional method. This can be further reduced.

[Brief explanation of the drawing]

Figure 1 is a plan view of the entire apparatus suitable for carrying out the present invention, and Figure 2 is a sectional view of an example of a shape made by extrusion molding, where A is a solid type shape and B is a solid type shape. is a cross-sectional view of a hollow type profile, Figure 3 is a cross-sectional view showing the joint of the residual billet, Figure 4 is a longitudinal cross-sectional view of the extrusion device for solid type profiles, and Figure 5 is a cross-sectional view of the hollow type profile. FIG. 6 is a longitudinal sectional view of the extrusion device and a plan view showing an example of a hollow die. 1... Long ingot, 2... Conveyor, 3...
... Cutting machine, 4 ... Stopper, 5 ... Fixed length billet, 6 ... Direction changing machine, 7 ... Residual billet, 8
...First stopper, 9...Second stopper, 1
0... Joining machine, 11... Joining ingot, 12...
... Storage section, 13, 14 ... Lifter, 15 ... Container, 16 ... Profile, 17 ... Solid die, 18 ... Conveyor, 19 ... Dummy block, 20 ... Stem, 21 ... Neck, 22 ... ...Hollow die, 23...Butt, 24...Inclusion, 2
5...Bypass conveyor.

Claims (1)

[Scope of Claims] 1. A method for manufacturing a fixed-length billet for an extruded shape by sequentially cutting a long ingot into predetermined dimensions, including: (b) A step in which a fixed-length billet cut and formed from a long ingot is integrally joined by welding or the like at a point outside the feed line to create a jointed ingot, and this is stored. When operating a device in which the difference (a) between the circumferential surface and the inner circumferential surface of the container is large, the feed for cutting the long ingot is stopped, and the bonded ingot is fed into the long ingot cutting device. A billet for an extrusion device comprising the steps of sequentially cutting the billet into predetermined dimensions to make a fixed-length billet, placing the billet cut from a long ingot on a feeding line, and sending it to the extrusion device. Production method. 2. (a) A first line equipped with a cutting machine for making fixed-length billets from long ingots and a device for sending the billets to an extrusion process; (b) A first line that joins together the remaining billets produced by cutting the long billets. a second line for storing the bonded ingots; (c) stopping feeding of long ingots from the first line and cutting the bonded ingots through a bypass path; A billet manufacturing device for extruded shapes that is equipped with a bypass line that feeds into the machine.