JPH05212438A - Twisted extruded material manufacturing method and extruded material manufacturing apparatus - Google Patents

Abstract

(57) [Summary] [Structure] The extruded material (X) is extruded so that the twisted extruded material (X) immediately after extrusion advances straight along the extruding direction without any drop and without bending in the left and right directions. Slide guides (10), (11), (12) arranged on the exit side of (A)
Extrude while constraining with. [Effect] The slide guides (10), (11) and (12) suppress the occurrence of waviness or bending over the entire longitudinal direction of the twisted extruded material (X) immediately after extrusion, and
The occurrence of spiral bending for each lead is also effectively suppressed. Therefore, the stretcher straightening is not necessary, and the variation of the lead caused by this is also eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a twisted extruded material and an apparatus for manufacturing the extruded material.

[0002]

2. Description of the Related Art A screw having a plurality of twisted spiral blades (Y) as shown in FIG. 5, for example, used in a screw rotor or a compressor of an e-pump in an automobile supercharger. Extruded material (X) is
It is known that it can be produced by twist-extruding a billet of an aluminum alloy or the like using an extrusion die having a bearing portion to which a predetermined lead is twisted (for example, Japanese Patent Laid-Open No. 1-215408). Gazette or JP-A-62-63190).

Such a twisted extruded material (X) is an extruder (A) equipped with an extrusion die (2) as shown in FIG.
, The initial table (8) arranged on the exit side (hereinafter, sometimes referred to as front in this specification).
Extruded on. Next, the extruded material (X) advances on the runout table (9) arranged in front of the table (8).

The extruder (A) includes a container (1) into which a billet (B) is loaded, and a twisting extrusion die (2) arranged in front of the container (1) in close contact with each other, as shown in FIG. , A backer (3) placed in contact with the front of the die, a die ring (4) accommodating the die (2) and the backer (3) inside, and placed in contact with the front of the backer (3) A bolster (5), a die slide (6) for accommodating the die ring (4) and the bolster (5), and an end arranged in contact with the die slide (6) and the bolster (5). It is composed of a platen (7).

As described above, the twisted extruded material (X) extruded from the extruder (A) and sequentially advanced on the initial table (8) and the runout table (9) is cut into a predetermined length. It is sequentially transferred to a cooling table (not shown) arranged on the side of the runout table (9).

Since the twisted extruded material in this state has a bend as a whole, it is straightened by a stretcher table (not shown).

[0007]

Although such a stretcher straightening improves the relatively large bending generated in the entire twisted extruded material, the straightening causes variations in the leads of the twisted extruded material (X). However, there is a new problem that the accuracy is lowered due to the occurrence of the phenomenon.

Further, the twisted extruded material (X) includes not only the overall relatively large bend described above but also a spiral bend for each rotation of the lead as shown in FIG. However, this kind of spiral bending is hardly improved by the stretcher straightening.

As described above, in the above-described conventional extrusion apparatus, only the twisted extruded material having the lead variations and the helical bending for each rotation of the lead, which has difficulty in precision, can be obtained. The current situation is that it has not yet been industrialized due to its use.

The present invention has been made in view of the above problems, and a method and a method for producing a highly accurate twisted extruded material in which both lead variations and spiral bending are improved. An object of the present invention is to provide an apparatus for manufacturing a material.

[0011]

The inventors of the present invention have conducted extensive studies on the cause of bending of the twisted extruded material (X) in order to achieve the above-mentioned object, and the results are shown in FIG. As described above, in the conventional extrusion apparatus, the height of the bearing portion of the die (2) and the initial table are set so that the extruded material (X) immediately after extrusion is smoothly guided to the initial table (8) and the runout table (9). Paying attention to the fact that the height of the upper surface of (8) and the height of the upper surface of the runout table (9) are sequentially set lower,
The inventors found that the drop (h) is one of the causes of bending, and completed the present invention through further experiments and research.

The present invention is, in essence, designed so that the twisted extruded material is extruded while being restrained by the slide guide member so that the extruded material can move straight in the extruding direction without any drop and without being bent in the lateral direction. ..

That is, in the method for producing a twisted extruded material according to the present invention, when the twisted extruded material is extruded from the extruder, the twisted extruded material is supported from the lower surface side on the exit side of the extruder. In addition, a slide guide that restricts the bending of the extruded material in both the left and right directions is provided, and while maintaining the height position immediately after extrusion by the slide guide and constraining the extruded material so that the extruded material advances straight along the extrusion direction. It is characterized by performing extrusion. Further, the twisted extruded material manufacturing apparatus according to the present invention is designed to support the extruded material from the lower surface side so as to maintain the height position immediately after extrusion on the exit side of the extruder and to make the extruded material travel straight along the extrusion direction. It is characterized in that a slide guide for restraining the extruded material for restricting bending in both left and right directions is provided.

The slide guide may be any one that supports at least the lower surface side of the twisted extruded material and restricts the bending in the left-right direction. As a concrete shape,
For example, it may have a groove having a semicircular cross section or a U-shaped cross section that is set to a size that allows the twisted extruded material to pass therethrough, or to the extent that the extruded material is allowed to pass therethrough. It may have a cylindrical portion set to the size of. Since such a guide regulates the bending of the twisted extruded material, it is desirable to use those in which the inner diameter of the groove portion and the cylindrical portion is set to be larger than the outer diameter of the extruded material by about 5 to 10 mm. ..

Further, the above guide is excellent in heat resistance and does not damage the extruded material because the twisted extruded material in a high temperature state immediately after extruding in the groove portion or the cylindrical portion thereof advances while rotating. It is required to be composed of various materials. In order to meet such demands, it is desirable to use one that is entirely formed of carbon, or at least the contact surface side with the extruded material is coated with carbon or the like.

The mounting position of the guide member is not particularly limited, but is preferably, for example, inside the end platen arranged in front of the bolster of the extruder, on the initial table or on the runout table. It is most desirable to install the slide guides at all of these positions, but it is sufficient to dispose them at at least one or two or more positions.

[0017]

The extruded material is twist-extruded by the twist-extrusion die of the extruder. This extruded twisted extruded material is
A slide guide arranged on the exit side of the extruder holds the height position immediately after the extrusion and passes through the guide while restricting the lateral bending. By passing through this guide, the generation of waviness or bending over the entire length of the extruded material is suppressed, and the generation of spiral bending for each lead is also effectively suppressed. In addition, since the occurrence of bending is eliminated in this way, it is possible to eliminate the need for subsequent stretcher straightening and to eliminate the occurrence of lead variations due to such stretchers.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to a cross section 4 as shown in FIG.
A case of extruding into a twisted extruded material (X) for a screw rotor will be described based on Examples.

In FIG. 1, (A) is an extruder, which is a container (1) into which a billet (B) is loaded, and a twisting extrusion die (2) arranged in front of the container (1) in close contact with each other.
A backer (3) arranged in contact with the front thereof, a die ring (4) accommodating the die (2) and the backer (3) inside, and arranged in contact with the front of the backer (3). The bolster (5), the die slide (6) that accommodates the die ring (4) and the bolster (5), and the rear portion of the die slide (6) and the bolster (5) in contact with each other. It is composed of the end platen (7).

On the outlet side of the extruder (A), an initial table (8) and a runout table (9) are sequentially arranged in a line.

Although such a construction is exactly the same as that of the conventional extruder, in this embodiment, the exit side of the extruder (A) is
Slide guides (10), (11) and (12) are arranged. This slide guide (10) (11) (12)
Is a first fitted and fixed inside the end platen (7)
Slide guide (10) and initial table (8)
It is composed of a second slide guide (11) arranged and fixed on the upper side and a third slide guide (12) arranged above the runout table (9) in a spaced manner.

As shown in FIG. 1, the first slide guide (10) has an outer diameter that gradually increases toward the front, and a twisted extruded material (X) along the axial direction at the center. It has an insertion hole (10a) that allows passage, and is fitted and arranged properly inside the end platen (7), and it is intended to restrict the occurrence of bending by a canister. As shown in FIG. 2, the guide (10) is formed by fitting an inner tubular member (14) made of carbon inside an outer tubular member (13) made of iron or the like, and is in a high temperature state immediately after extrusion. Care is taken to prevent the extruded material (X) from being damaged. In addition, the bottom surface level of the inner tubular member (14) is set so as to substantially coincide with the lower surface of the extruded material (X) so that the extruded material (X) immediately after extrusion passes in a state with substantially no drop. The inner diameter is set to be slightly larger than the outer diameter of the extruded material (X) so as to effectively control the occurrence of bending. Extruded material (X) when the inner diameter of the guide (10) is too small
However, even if it is too large, the effect of restricting the occurrence of bending will be lacking. Therefore, the inner diameter of the guide is 5-10m larger than the outer diameter of the extruded material (X).
It is desirable to set it larger by about m.

The second slide guide (11) is arranged and fixed on the initial table (8) over the entire length thereof, and as shown in FIG. An arcuate groove (11a) is formed.
This guide (11) is also made of carbon from the viewpoint of preventing the extruded material (X) from being scratched, and has an inner diameter smaller than the outer diameter of the extruded material (X) by 5 in order to effectively prevent the occurrence of bending.
It is set to be large by about 10 mm. The second slide guide (11) is set to the same or slightly lower height level as the first slide guide (10) and is in a substantially level condition, so that the extruded material (X) does not bend. Is considered as.

The third slide guide (12) is made of carbon having a groove (12a) similar to the second slide guide (11) on the upper surface thereof, as shown in FIG.
As shown in FIG. 1, it is arranged above the runout table (9) at the same or slightly lower height level as the second slide guide (11). The guide (12) is composed of a plurality of unit guides (12 ') divided along the longitudinal direction of the runout table (9), and each unit guide (12') is located on the side of the runout table (9). An arm (16) made of iron or the like extending from the upright pillar (15)
It is supported by.

Then, the twisted extruded material (X) extruded from the extruder (A) is first in the first slide guide (10).
And then through the second and third slide guides (11) (12). During this time, the extruded material (X) maintains a straight state with almost no drop along the extruding direction. At that time, the extruded material (X) is not
(0) The insertion hole (10a) restricts the bending in the entire circumferential direction, and the following second and third slide guides (1)
1) The vertical bending and the horizontal bending are restricted by the groove portions (11a) and (12a) of (12). In this way, the extruded material (X) advances in a restrained state in which the bending is restricted by the guides (10), (11), and (12). As a result, it is possible to obtain a highly precise long twist extruded material (X) having neither a large bend in the longitudinal direction nor a spiral bend.

The twisted extruded material (X) thus obtained is cut into a predetermined size, transferred to a cooling table (not shown) arranged on the side of the runout table (9) and cooled. However, stretcher straightening is no longer necessary at this stage.

Incidentally, in the case of the twisted extruded material (X) manufactured by the conventional apparatus, the variation of the lead after the stretcher straightening is 1 to 2%, and the spiral bending is 1 to 2 mm / While it was 300 mm, the apparatus according to the above-mentioned example has 0.2 to 0.3% and 0 to 0.3 mm / 300 mm, respectively, and it can be confirmed that the accuracy is remarkably improved.

In the above embodiment, the first to third slide guides (10) (1) are provided on the exit side of the extruder (A).
Although 1) and (12) are shown, the present invention can achieve the object by arranging them at any one position on the outlet side of the extruder (A).

[0029]

As described above, the method for producing a twisted extruded material according to the present invention, when the twisted extruded material is extruded from the extruder, the twisted extruded material is provided on the exit side of the extruder. A slide guide that supports the extruded material from the bottom side and restricts the bending of the extruded material in both the left and right directions is provided, and the slide guide holds the height position immediately after the extrusion and advances straight along the extrusion direction. The extrusion is performed while restraining the.

Therefore, in the extruded material immediately after extrusion, the slide guide suppresses the occurrence of waviness or bending over the entire longitudinal direction, and also effectively suppresses the occurrence of spiral bending for each lead. By eliminating the occurrence of bending in this manner, subsequent straightening of the stretcher is unnecessary, and therefore, variation in leads due to the stretcher is also eliminated, and a highly accurate twisted extruded material can be provided. ..

Further, in the twisted extruded material manufacturing apparatus according to the present invention, the extruded material is supported on the exit side of the extruder from the lower surface side so as to maintain the height position immediately after extrusion, and the extruded material is extruded in the extruding direction. Since a slide guide for restraining the extruded material that restricts bending in both left and right directions is arranged so that it can move straight along, it is easy to add a guide to the conventional device, and as described above. A highly accurate twisted extruded material can be provided.

[Brief description of drawings]

FIG. 1 is an overall side view showing an outline of a twist extrusion material manufacturing apparatus according to the present invention in section.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG.

FIG. 5 is an enlarged perspective view of an end portion of the twist extruded material.

FIG. 6 is an overall side view showing a cross section of an outline of a conventional twist extrusion material manufacturing apparatus.

FIG. 7 is a side view of a twisted extruded material manufactured by a conventional twisted extruded material manufacturing apparatus.

[Explanation of symbols]

 10 Slide Guide (1st Slide Guide) 11 Slide Guide (2nd Slide Guide) 12 Slide Guide (3rd Slide Guide) A Extruder X Twisted Extruded Material

(72) Inventor Yoshitaka Hayami, 6-224, Kaiyamacho, Sakai City, Osaka Prefecture, Showa Aluminum Co., Ltd. (72) Inventor, Yasuo Shiozawa, 6-224, Kaiyama Town, Sakai City, Osaka Showa Aluminum Co. Within

Claims (2)

[Claims] 1. When the twisted extruded material is extruded from the extruder, the twisted extruded material is supported from the lower surface side to the exit side of the extruder and the bending of the extruded material in both left and right directions is regulated. A twisted extruded material which is provided with a slide guide, holds the height position immediately after the extruded material by the slide guide, and restrains the extruded material so that the extruded material advances straight along the extruding direction. Manufacturing method. 2. An extruded material that supports the extruded material from the lower surface side to hold the height position immediately after extrusion on the exit side of the extruder and regulates the bending in both left and right directions so that the extruded material can move straight along the extrusion direction. A twisted extruded material manufacturing apparatus characterized in that a restraining slide guide is provided.