JPH012789A - Manufacturing method of aluminum welded can with coined pattern - 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 Field of Industrial Application This invention provides an aluminum welded can with excellent surface appearance characteristics, and an aluminum welded can with various coined patterns; b
There are some related to methods of manufacturing.

Conventional (support' + d・i Healing and soft drinks 11rF), IIJ, near l;L 1-f From the viewpoint of physical properties, appearance characteristics, cleanliness, etc., aluminum Fj is used. The number of products in cans has increased recently.
With the aim of increasing the number of eggs to 9 ↑ 1, and increasing the quality of the eggs,
Tato Iku, who lazily added various coining patterns to the lulul type,! There is a growing demand for cans with improved 'li'l'J.

By the way, as for the conventional aluminum "Tsumu", Shitsu U D
One of the two bases created by the Ilkawa construction method (the single-strip method and the one-strip method) has been used in history. However, 2 hits.

- When mounting the base, it is necessary to make a strong sound at the D I 7J11 T- at the same time as the exit hole (blank), so the state of the blank board before D I 7111T. Embossing (IA Ka-[(empossing)
It would be incompetent to do this, so we have to go to 11 after creating the n-bottom cylinder with D l /J mouth king for the 1-mark pattern [, if f is 11. However, for the 41-bottom cylinder, the top of the coining imitation is 1゛j (well,
Actual 1: Matsuri 1- was working at home, so the coined pattern was applied to the two-piece aluminum shell (=JLk was not so clearly expressed on wood).

On the other hand, in Steel II, the blank is circumferentially curved to avoid 1! A commonly used method is to create a cylinder by electrical resistance seam welding, stone joining, soldering, etc., and finally form a 3-piece A1. In manufacturing such a three-piece mountain, the coining pattern ( ) is added to the can body shape.
The best way to do this is to process the coining pattern on the blank before making the cylinder, or in this case, the joining surface when making the cylinder will not be flat, making it difficult to join, and even if it can be joined, it will be difficult to join. There was a problem that sufficient airtightness could not be obtained. Furthermore, although it is easier to apply a coining pattern after the cylinder is made than in the case of a cylinder with a two-piece mountain bottom, there are problems in terms of efficiency and economy.

Problems to be solved by inventionAs mentioned above, aluminum cans are not commonly used6.
In the case of 2-piece production, DI 7 Kawajuyo Koyoru did the C coining pattern 1 loss of the system shrine before forming the cylinder. It is also customary to process a coining pattern after molding, and the 3-piece material that is often applied to -h series 1-rules ([In I, the material board is made into a cylinder, and the coining pattern is formed at the stage of the material plate/III] -415 There is a problem with the joining to create the cylinder,
In addition, after forming into a cylinder, the 11-mark pattern t+U, t < efficiency y) caused problems in terms of economy.

This invention was made to solve the above problems.
The purpose of this invention is to provide a method by which aluminum cans with a coined pattern on the back can be easily produced without solving the problems described above.

Means for Solving the Problems In order to solve the above-mentioned problems, the inventors of the present invention conducted extensive experiments and created small holes, and found that in the manufacturing process of conventional 3-piece cans, a coining pattern was applied in advance. It is common knowledge that rolling the material plates into a circular shape and joining them is considered inappropriate in terms of airtightness.
By applying wave seam welding, the 11 mark pattern is created.
It is possible to join the material plates (shikou'I) with n 1 airtight f1, and it is possible to join them with the airtightness f1 of the material plate (shikou'I). They discovered that it was possible to create a cylinder that was airtight ↑4 and came up with this invention.

Therefore, the coined aluminum of this invention? ?
! The manufacturing method for 'lt F[: is to curve a full mini thin plate with a coining pattern h01 in advance into a circumferential shape, overlap its ends, and then create a super P1 hem seam at the overlapping part. Characterized by joining by welding: shinotemeru.

Here, as for the aluminum thin plate which has been subjected to a coining pattern process in advance, the height (mm) of the convex part due to the coining pattern process and the area (-) of the convex part define d/J3<1.0. It is desirable to use something within this range.

Function: Noluminium IH contact (J3 in L manufacturing method) of this invention.
1. As the tooth material for the teeth, a thin aluminum sheet 1, which has been previously processed with various coining patterns as shown in FIG. 1, is used. The 611 coined stamp patterns are T.
C city, which is also referred to as N-kososu 1101, refers to a plastic t'J processing method in which a plate material is passed between the rolls using rolls with uneven surfaces and the uneven pattern of the rolls is temporarily transferred. The pattern shape of the coining pattern formed by this coining pattern processing is not particularly limited, or may be determined by the height d(s) and area S(s) of the convex portion 4 protruding from the surface 3. d/'JQ<i.

It is desirable that it be within the range that satisfies the following. Here, when the planar shape of the convex part 4 is a square as shown in FIG. dy"!,
If it is 1.0 or more, that is, the height of the convex part 4 or the convex part 4
The value of the square root of the area S is smaller than the value of the square root of the area. The convex part 4 of the thin aluminum plate processed with the coining pattern is defined by the reference plane 3, which is a plane that is connected to the same horizontal plane in the two-dimensional direction. It refers to the part that protrudes from the reference surface 3, and it goes without saying that there are cases where the front side of the apparent c is the reference surface 3 and the convex portion 4 or the apparent surface protrudes toward the back side of the upper surface. .

Furthermore, the upper limit of the apparent total thickness T including the height d of the convex portion is not particularly limited, but in the case of a normal coining pattern h[I■, it is about three times the thickness t of the thin plate or the upper limit, In general, it is often less than twice the thickness t, and if it is less than ■ or 3 or less than 21, ultrasonic seam welding can be performed just by satisfying the conditions of d/, J'S < 1.0. can.

Aluminum thin plate 1 processed with a coining pattern as described above
are formed into a circumferential shape by a known method such as roll forming, and both ends 5. of the thin aluminum plate 1 are formed as shown in FIG.
6 are overlapped, and the overlapped part 7 is attached to the ultrasonic welding tip 8.
and the anvil (base) 9. Then, the overlapping portion 7 is solid phase bonded by appropriately pressurizing with the tip 8 and changing the horizontal ultra-γ
Seam welding is accomplished by relatively moving the overlapping portion 7 in the seam direction.

Here, as for conventional ultrasonic seam (D) welding, it has been usual to perform medium lap seam welding, which has a small degree of deformation of the welded part, and this method was In ultrasonic seam bath welding, it is desirable to use mash seam welding, which has a large degree of deformation of the welded part.In other words, it is desirable to use seam welding, which has a large degree of deformation in the welded part. As shown in Fig. 3, weld the welded aluminum plate 21.22 by carefully taking the overlapping margin, and put the tip 21A of the thin plate,
22A is sandwiched between the tip 8 and the duckling 9 (ultrasonic seam), and
In this case, the total thickness of the two stacked thin plates before welding is t
o, the minimum thickness of the welded part after welding is 11, (jO-t
The degree of deformation expressed as l)/lo is a small value of 5% or less, and in this case, it is normal that only the thin plate 21 on the -1 side is deformed and a recess 24 is formed in that part. On the other hand, lap seam welding reduces the overlap of the overlapped parts and crushes both the upper and lower thin plates of the overlapped part as a whole and symmetrically with a degree of deformation that is human-like, forming a nearly flat lap joint. However, this type of seam welding was performed by resistance welding or the like, or not by ultrasonic seam welding. However, the inventors of the present invention have already proposed in Japanese Patent Application No. 60-234808 to increase the seam welding speed by performing mash seam welding by ultrasonic seam welding. By applying this method, thin aluminum plates that have been previously processed with a coined pattern can be joined without causing welding defects.

To roughly explain in detail the ultrasonic seam welding situation in the method of the present invention in the case of the above-mentioned mash seam welding, as shown in FIG. The overlapping margin of the threaded portion 7 is preferably within the range of 0.5 to 4 mm, and preferably within the range of 0.7 to 14 mm within the rough groove range. Also, both ends 5 of the aluminum thin plate 1 are joined together.
The sum of 6 and 81 actual '4 thickness is to(=21>, the welded part I9 after welding is 11, and the actual degree of deformation expressed as ((to-tl)/1o) x 100(%) is 20 to 50. %, the entire Φ joining part 7 must be pressed down, so if 3 Nanami seam) d is in contact, a matshu seam-shaped joint part as shown in Fig. 2 (B) is formed. desirable.

According to this type of ultrasonic seam ID contact, the box pattern/J
[It is possible to completely join the width joints of thin aluminum sheets that have undergone J processing, that is, uneven aluminum sheets, without compromising airtightness.

This was newly discovered by the present inventors, and the reason for this has not yet been completely elucidated, or is generally thought to be as follows.

In other words, in ultrasonic welding, pressing force is applied in the direction of crushing the metal body of the river mesh part 7, and then crushing the unevenness created by the C coining pattern 1 [1], and then the water is applied. 'T”iy facing J
f3 rohe (gives a radial motion, but due to the beginning of this supersonic wave, plastic flow is generated near the joint interface, the joint interface expands, and at that joint interface, the 9 planes (which is a story) or the same phase are generated. The joint is made 11. At this point, the unevenness caused by the coining pattern created by the plastic flow described in 1 is easily crushed and flattened.
It is thought that the new 1j3 planes are joined in close contact with each other in the light beam.

Then, in 14, set the inner thread allowance 1 of the joint part 7 to 0 as mentioned above.
．． 20-50% of people are within the range of 5-4mm, preferably 0.7-1.5m! 4. When 5 deformed reeds are installed, the overlapping part 7 is crushed with a large degree of deformation, and the largest deformation occurs at the tips 5A and 6A of both ends 5 and 6 where the widths are joined, resulting in a pine seam type joint. At this time, the tips 5A and 6A are not constrained by the undeformed portions, so both ends 5 and 6 easily expand laterally in the overlapping portion 7, and the unevenness caused by the coining pattern process is easily crushed. Become something and be seen.

Here C, f7f, process the impression! As mentioned above, if the relationship between f:Moss d and area S of the convex portion 4 of the broken aluminum thin plate does not satisfy (U, "JS < 1.0, the stiffness of the thin plate is too strong. If!4 The unevenness caused by adding a coining pattern to the sonic seam welding will not be crushed,
It is desirable that d/J3<1.0.

In addition, ultra-high wave seam welding is applied to i:i now aluminum with an overlapping margin of 0.5 mm at the Φ joining part of the thin sheets of aluminum.
As welding progresses during welding, the edges of the thin aluminum plates that have been joined together tend to become misaligned, and there is a risk that seam welding may become impossible. On the other hand, if the handle width exceeds 4.0#, it becomes impossible to deform the tip of the thin plate at the overlapping part into light, and as in the case of the conventional method shown in Fig. Due to this restriction, it may become difficult to crush and cover the unevenness caused by coining pattern processing. It is desirable that the burial distance be within the range of 0.5 to 4.0 m.

In addition, when there is no 20% vortex, there is either lateral expansion or rp, which sufficiently crushes the unevenness or rotation, which is J-3. If it exceeds 50?b, it is likely that the joint will become thinner than the base material plate thickness and cause a problem of strong binding. Therefore, the degree of deformation should be within the range of 20 to 5%. Desirable.

In addition, as mentioned above, the overlap margin was set to 4.0% so that the actual yellow deformation was 20 to 50%. In addition to the following, for example, increasing the i'JO pressure during welding or using ultrasonic imaging
It is desirable to use measures such as increasing f energy (JI).

By the way, as mentioned above, when ultrasonic seam welding is performed with a high degree of deformation of 20% or more with an overlap allowance in the range of 0.5 to 40 mm, the overlap allowance is close to the lower limit of 0.5 mm (if As the welding progresses, the ends of the aluminum thin plates that are joined gradually move away from each other, and welding may become impossible in the latter half of the welding process.In order to prevent this, the following A.
, B, and C are preferred.

A: Anticipating the expected misalignment, and depending on the misalignment φ,
(Beforehand) Lay them together so that they are smaller than the welding allowance at the end of the vertical welding or the start of welding. In this case, the increase in the welding allowance at the welding end with respect to the 't8 welding end is usually the weld length 2
It is preferable to set it to about 05 to 2.0 mm per 50 mm.

B: The welding line ◇ is temporarily sealed in advance by ultrasonic spora 1 or welding.

C: Both ends of the thin aluminum plate that is the object to be welded are heated to 18
50K (J or more load Φ
Clamp it with.

Here, any one of these methods A to C may be used alone, or if two or more are used 1i, -+1 deviation can be reliably prevented.

In addition, when the cylinder is actually applied to drink cans, food cans, etc., a bottom plate and a lid plate are attached to the cylinder by ultrasonic seam welding. As for the attachment method, the same means as in the production of the conventional three-piece ζL may be applied.

Of course, the aluminum targeted by this invention includes not only aluminum inserts but also aluminum aluminum alloys.1 Furthermore, the thickness of the aluminum thin plate targeted by this invention is There is no particular limitation as long as the seam can be welded, usually 1.0#
It is applicable if it is below, especially 0.5
The method of the present invention can be suitably applied to the following cases.

゛Example test sample (A is an aluminum alloy thin plate of JIS 5052-T138 material with a thickness of 0.23M, a length of 120, and a width of 200mm, and this thin plate was rolled with an irregular uneven pattern formed on the surface. A coined pattern was formed by passing the board between them.The height d (m) of the convex part of the board after the coining pattern was processed
The relationship between the area S(#) of the convex portion and the d/43 value was less than 1.0 at the maximum. Also, the apparent thickness T was approximately 183 times the thickness T (= 0.23 M).

Roll such a thin plate into a circumferential shape, overlap the two ends with hand allowance L = 1m, and use a welding machine with an output of 1200W.
Seam welding using ultrasonic seam welding machine? No fangs,
Weldability was investigated. Here, the weldability was determined by applying Color-IL coating liquid to the outside surface (coating/filing), and determining whether the liquid oozed out from the surface or from the back surface after 24 hours.

The first person (Kojo J.

d3 As a comparative example, a cylinder of the same +A Y'f and the same (1 method) which was processed with a coining pattern in the same manner as above was made by electric resistance seam welding or tangent, and these were also melted (↑↑ 1 or adhesion [(1 was adjusted.

As shown in Table 1 of the first person, in the case of the comparative example using conventional electric resistance seam welding and contact seam welding, leakage occurred at the joint of the thin aluminum plate with the coined stamp pattern 711■, and it was difficult to maintain sufficient airtightness. In contrast, with the method of the present invention, only the joints were generated and sufficient airtightness could be ensured.

Effects of Excusation As is clear from the above-mentioned embodiments, according to the method of the present invention, by applying ultrasonic seam welding, a thin aluminum alloy plate, which has been subjected to coining pattern processing in advance, is rolled up and joined at both ends thereof. However, the method of this invention has made it possible to join with optical airtightness when manufacturing vertically welded aluminum cans with a coined pattern on the ff11M surface. It has become possible to easily weld 1 q of aluminum without any damage, and therefore it has become possible to practically provide aluminum welding with excellent surface appearance characteristics.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of a coined aluminum plate used in the method of the invention/J[1].
FIGS. 2(A) and 2(B) show the method of this invention.
This is a diagram to explain seam welding.
(13) is a schematic sectional view showing the situation before welding, and (13) is a schematic cross-sectional view showing the situation after welding. Figure 3 explains conventional general ultrasonic seam welding.
In these figures, (△) is a schematic sectional view 1J showing the situation before welding, and (B) is a schematic sectional view C showing the situation after welding. 1... L1 imitation 1. I hn-treated aluminum thin, temporary, 4...Protrusion, 7...Overlapping part. Applicant: Sky Aluminum Co., Ltd. 1 Wa Seikan Co., Ltd. 71 Agent: Patent Attorney 1) Hisashi Take (and 1 other person) Figure 2 (A) Figure 3

Claims (2)

[Claims] (1) A thin aluminum plate that has been processed with a coining pattern in advance,
A method for producing a welded aluminum can with a coinage pattern, characterized by curving it circumferentially, overlapping its tips, and joining the overlapping part by ultrasonic seam welding. (2) As for the aluminum thin plate subjected to the coining pattern processing, the height d (mm) of the convex part due to the coining pattern processing and the area S (mm) of the convex part satisfy d/√S<1.0. A method for manufacturing an aluminum welded can with a coined seal pattern according to claim 1, using a material within the range of the invention.