JPS6027418A - Production of reinforced metallic cylinder - Google Patents

Abstract

PURPOSE:To form annular recesses to a double-walled annular flange and to make multiple production of an annular-flanged cylinder by providing the annular recesses to the side wall of a cylindrical body consisting of a thin metallic material then pressurizing the same in an axial direction from both end face sides of the cylindrical body. CONSTITUTION:Margins 2, 2a for seaming are provided to the right and left edges of a rectangular thin iron sheet 1 subjected to surface treatment and notches 3, 3a are provided to the prescribed position of margins 2, 2a. The seams are then mated to form a cylindrical body 4 and annular recesses 5, 5 are provided so as to pass through the positions of the parts 3, 3a. Pressurizing plates 6, 6 are then pressed to the top and bottom end faces of the body 4 and are pressurized in the direction of arrows 7, 7 to form a double-walled annular flange 8. Said cylindrical body is used as a perforated cylinder by punching many small holes 9 to the side wall or as a metallic vessel 11 by fixing a bottom plate 10 thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a reinforcing metal cylinder, the purpose of which is to provide an annular flange on the inside of the cylinder when the cylinder is formed from a thin metal plate.

Conventionally, it has been known to provide annular protrusions or grooves to reinforce metal cylinders.
3), it may not be sufficient as a shape-retaining cylinder for filters, etc., which is subject to a pressing force of 9 to 10%. In such a case, the problem can be solved by increasing the thickness of the material metal plate (for example, using a 1wAO thin metal plate), but if the thickness is ll
Since the amount of material used is twice as much as the +lll1O thin metal plate, it goes without saying that it is desirable to use a thin metal plate and maintain a predetermined strength 7. Therefore, the inner surface of the cylinder has an annular flange (
A pressure resistance of 10% or more was obtained with a cylinder made of a thin metal plate having a thickness of Q, j; TFWI. Therefore, we propose a method for manufacturing such a cylinder.

Furthermore, even if the cylindrical body has a flange on the side wall,
Since it is difficult to form a flange at the flange, it is preferable to cut out the flange where the flange is formed, but this is not necessary with a welded cylindrical body or a bonded cylindrical body (interposed with adhesive). .

That is, to explain this invention with reference to an embodiment, a surface-treated rectangular thin iron plate l is provided with gaps 2a on both left and right edges,
A cutout portion 3.3a is provided at a predetermined position of each edge 2a. Using the thin iron plates /g, fit them together in a usual manner to form a cylindrical body, and provide annular recesses, t, tg, on the side wall of the cylindrical body ψ, passing through the positions of the cutouts J and 3a. 3
figure). Next, the pressure plate 6.6 is brought into contact with the upper and lower end surfaces of the cylinder body, and the pressure plate 6 is pressed in the direction of arrow 7.7, thereby bringing the annular recessed portion S and the left outer wall into contact with y. This is to form a double-walled annular collar g. The cylindrical body manufactured according to the present invention has many small holes in the side wall, for example, as shown in Figure 1. It can be used as a perforated tube with Y holes (for example, a shape-retaining tube for an oil filter), or as a metal can by fixing the bottom plate lO as shown in Figure 1. In FIG. 6, // is a paper filter. Although the above embodiments have been described with respect to thin iron plates, it goes without saying that the present invention can be applied to cylinders made of thin aluminum plates and other thin metal plates.

There is no limit to the number of annular flanges formed by this invention, and in principle, the strength increases as the number increases, but if too many are provided, the rectangular plate must be made longer by the double wall compared to the length of the product cylinder. However, since there is a risk that the original effect of material saving may be reduced, one standard would be to provide annular flanges at intervals equal to the diameter of the cylinder, for example. In short, the number of annular collars is determined to meet the requirements depending on the thickness and strength of the thin metal plate used.

That is, according to the present invention, after the annular recess 7 is provided in the wall of the cylindrical body, pressure is applied in the axial direction from both ends of the cylindrical body, so that it is possible to instantly manufacture a cylindrical body with an annular flange having the same shape. However, if the depth of the annular recess is regulated, the annular flange width will be automatically determined.
It is effective in producing large quantities of homogeneous products.

[Brief explanation of drawings]

FIG. 7 is a front view of a cylindrical body manufactured according to the present invention with a part (perforation) omitted; FIG. 2 is a partial sectional view; FIG. The diagram shows a cross section of a metal can made of the product of this invention...Thin iron plate 2.2a.
... Edge width 3.3a ... Resection part Hiroshi ... Cylindrical body ... Annular concave part ... Annular flange Patent applicant Osamu Yaguchi Department representative Tadashi Suzuki Figure 3 Figure 4 6. 7.

Claims (1)

[Scope of Claims] l After providing an annular recess in the side wall of a cylindrical body made of a thin metal plate, pressure is applied in the axial direction from both end surfaces of the cylindrical body to form a double-walled annular flange of the annular recess 7. Method for manufacturing a reinforcing metal cylinder characterized in that the thin metal plate is a thin aluminum plate or a surface-treated thin iron plate. Method 3 for manufacturing a reinforcing metal cylinder according to claim 1. The thin metal plate is a large number of thin metal plates. A method for producing a reinforcing metal cylinder according to claim 1, in which small holes are formed. An annular recess is provided in the side wall of the cylindrical body for each of the edge cut portions, and the cylindrical body is pressurized in the axial direction from both end surfaces at °C, and the annular recess is formed into a double-walled annular collar. Manufacturing method S of a reinforced metal tube characterized by forming a reinforced metal tube according to claim 7, in which the metal tube is a filter reinforcement tube or a metal can body.