JPS62282899A - Method of breaking and separating temporarily joined sectionin aluminum extrusion material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Industrial Field of Application This invention relates to an aluminum extruded material, particularly an integral product in which two or more molded parts are coextruded together through a thin temporary joint. The present invention relates to a method for finally separating each molded part of an extruded material by separating it from a temporary joint.

Conventional technology When extruding aluminum extruded materials, molded parts that should be separated and removed after molding are based on various requirements such as maintaining the shape and dimensional accuracy of the extruded materials, improving manufacturing efficiency, and facilitating handling management. The product may be integrally molded via a thin temporary joint, or a plurality of molded parts may be integrally molded into a combined state via a thin temporary joint.

For example, in the manufacture of a channel-shaped extrusion mold as shown in FIG. 2, in order to maintain the accuracy of the opening dimensions of the main body part (1) that becomes the product, a mode that extends between both side edges of the opening is used. At the same time, the band-shaped imitation part (3) is simultaneously integrally molded through the temporary joint part (2) (2), and in the production of the deformed slit shape material as shown in Fig. 3, extrusion is used. In order to maintain the stability of the posture on the ring table surface and prevent twisting in the length direction, the main body (
A prosthetic leg portion (13) is integrally molded at the end of the horizontal portion of the IL (IL) via a thin temporary joint (12).

Furthermore, when manufacturing a semi-hollow type semi-hollow extruded material as shown in Fig. 4, in order to obtain a good surface condition and dimensional viscosity at the slit-like small opening, the main body part (2
1), the cross-sectional support part (23) is attached to the thin temporary joint part (22) in such a manner that it straddles the opening.
It is desirable to integrally mold the material through the Furthermore, in the production of the angular extruded material as shown in FIG. 5, in order to improve production efficiency, the two main body parts (31)
(31) (Fi, joint part (32)) It is also practiced to unite them facing each other via (32) and integrally mold them.

Therefore, an integrally extruded material having two or more molded parts integrated via a temporary joint as described above is molded and, if necessary, subjected to a necessary heat treatment, and then the temporary joint ( 2)
(12) (22) Cut out (32) and draw parts (1) (3), (11) (13), (21)
(23), (31) (31) are separated from each other to form the required extruded material product. Conventionally, this separation method involves pressing the temporary joint with a roll to separate the parts, especially In the case of an imitation hollow molded product as shown in Figure 2, there are two methods: forcibly winding up the imitation part (3) and tearing the temporary joint, or separating it by cutting the temporary joint with a press. The method of doing so was adopted.

Problems to be Solved by the Invention However, the conventional separation method as described above not only has low work efficiency and requires a relatively large amount of time and effort, but also causes damage to the separated part, that is, the fractured part of the temporary joint. There is a risk of residual particles remaining, degrading the quality of the product, and furthermore, the shape of the part to be separated and removed is constrained by the requirements of separation work.
For example, it is inappropriate to attach and integrally mold the support part (23) having a complicated shape as shown in Fig. 4, and furthermore, it is impossible to integrally mold the separated part in a suitable shape, so it is not suitable as a molded product. There have been various problems such as the difficulty in sufficiently improving the precision of extruded materials at the extrusion molding stage.

Therefore, it is an object of the present invention to provide a method for separating extruded materials v2 that can solve the above-mentioned problems.

Means for Solving the Problems This invention attempts to break the FM 71 joint of an aluminum extruded material by applying forced vibration. In the method of separating the molded parts of an integrally extruded mill in which a plurality of molded parts are integrally molded through a joint by breaking a temporary joint, a vibrator is pressed against the integrally extruded material to apply forced vibration. The gist of the present invention is to provide a method for breaking and separating a temporary joint in an aluminum extruded material, characterized in that the temporary joint is caused to fracture by causing fatigue failure in the temporary joint.

As a means to impart forced vibration to an integrally extruded material,
For example, the simplest method is to use an air chopper to press the tip of the vibrator against the outer surface of the extruded material, or it is also possible to apply vibration in the same way using an electric vibration generator. The position where the vibrator is pressed is the part of the integrally extruded material that should be separated and removed, that is, the molded part with a relatively small cross-sectional area such as the prosthetic leg part, imitation part, support part, etc. It is preferable to select a location that will generate increased vibrations due to resonance phenomena. Furthermore, if the frequency of the applied forced vibration is less than about 1000 Hz, it will be difficult to break the temporary joint, and if the frequency is higher than about 5000 Hz, it may have a negative effect on the product part. Therefore, the forced vibration frequency is approximately 1000 to 5000Hz4
It should be u degrees, particularly preferably 2500 to 3500
It is Hzfu degree.

If the wall thickness of the temporary joint is 2.0 mm or less, it is possible to break and separate it by implementing the present invention, but it is generally formed to have a wall thickness of about 0.3 to 0.6 mm. It is normal to do so. Further, the separation method according to the present invention is preferably carried out when the material of the integrally extruded material is hard.
Therefore, in the case of heat-treatable alloys, it is preferable to perform the necessary heat treatment after extrusion before separating.

Effects of the Invention In this invention, in order to separate the above-mentioned parts of an integrally extruded material formed integrally through two or more molded parts or thin temporary joints, a vibrator is pressed against the extruded side to force the separation. By applying vibration, fatigue fracture is caused in the temporary joint and the fracture is carried out, so first of all, the work is extremely simple and can be carried out using only a vibrating tool, so it is easy to install. It is advantageous in terms of work space, etc., and work efficiency is also good. Moreover, the surface condition of the separated part can be finished beautifully and in good condition, and there is no occurrence of flaking or the like as in the case of conventional methods, so it is effective in improving the quality of extruded material products. In particular, after extruding the semi-hollow extrusion side of a semi-hollow type in an imitation hollow state, no debris remains on the opening edge even when the imitation part is separated and removed, making it suitable for use as is as a cylinder barrel for rodless rings. It becomes possible to obtain a moist extruded material.

Furthermore, since the above-mentioned separation is performed by applying vibration, there is no difficulty in separating the attached integrally molded parts such as the prosthetic leg, the artificial finger, the imitation part, the support part, etc., regardless of the cross-sectional shape. . Therefore, there is greater freedom to improve the molding precision of extruded material products by making them into complex shapes, and it becomes possible to extrude molded materials with even higher precision than when using conventional separation methods. It has excellent effects.

Example A6063 alloy is used to form a main part (21) of a semi-hollow extruded material as shown in FIG. An integrally extruded material (A) having (23) was extrusion molded. Here, the main portion has an outer diameter of 113 nn.
n, inner diameter of the hollow part (24) 80 mm, eccentric distance of the hollow part Kt 8 nun, width of the slit-shaped opening (25) 6
The width of the support portion (23) was 125 mm, the average thickness of the support portion was 8 mtn, and the thickness of the E joint (22) was 0.5 mm.

After extrusion, the integrally extruded material (A) was heat treated as it was and tempered to T5.

Then, an air chopper (2
6), and place the vibrator (27) at the tip of the vibrator (27) on the outer surface of the support part (23) about 15 tnr from the temporary joint (22).
Press at a position about n away, vibration frequency 2900Hz
A forced vibration was applied.

However, due to the application of vibration for several seconds, a crank was generated at the k+'U joint (22), and the fracture progressed from a portion close to the vibrator (27). Therefore, by moving the extruded material (A) in the length direction while pressing the vibrator (27), the total length of one temporary joint (22) of the integrally extruded material (A) with a length of 100 cm can be reduced. It can be completely broken in about 2 minutes, and by performing the same operation on the other temporary joint, the semi-hollow body part (21) and the holder part (23) are separated as shown by the chain line in Figure 1. were able to be completely separated. When this separated surface was observed, it was confirmed that a beautiful fractured surface free from paris was obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the implementation state of the separation method of the present invention, and FIGS. 2 to 4 are cross-sectional views of an extruded material illustrating various forms of integrally extruded material to which the present invention is applied. It is. (A)...Integrated extrusion mill, (1) (11) (21)
(31)...The main part of the molding that becomes the product, (2) (12
) (22) (32) Temporary joint, (3)
(13) (23)... Molded part to be separated and removed, (
27)... vibrator. Above 2j Figure 1 Figure 2 Figure 4 Procedural amendment book type) % type % 2, Name of the invention Method for breaking and separating temporary joints in aluminum extruded materials 3
, Relationship to the case of the person making the amendment Patent applicant address: 6-224 Kaizan-cho, Sakai City Name: Showa Aluminum Co., Ltd. Address: 72-4-I, Unagidani Nakano-cho, Minami-ku, Osaka City Date of amendment order: August 1988 June 26th, Number of inventions increased by amendment 8, Contents of amendment (1) "Figure 4" on page 10, line 12 of the specification is corrected to "Figure 5."that's all

Claims (2)

[Claims] (1) In a method of separating the molded parts of an integrally extruded material in which a plurality of molded parts are integrally molded via thin temporary joints by breaking the temporary joints, a vibrator is attached to the integrally extruded material. A method for breaking and separating a temporary joint in an aluminum extruded material, characterized in that the temporary joint is caused to undergo fatigue fracture and break by pressing and applying forced vibration. (2) The forced vibration frequency given to the integrally extruded material is 10
A method for breaking and separating a temporary joint in an aluminum extruded material according to claim 1, wherein the frequency is in the range of 00 to 5,000 Hz.