JPS5824244B2 - Ento Taiheno Emboss Moyou Mataha Tokomoyou no Keiseihouhou Oyobi Souchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a perforated pattern on the circumferential surface of a cylindrical body.

Conventionally, in order to form an embossed pattern or a perforated pattern on a cylindrical body, a flat plate on which a pattern has been formed in advance is formed into a cylindrical body by secondary processing.

However, with the above method, it takes a lot of work to bend the flat plate into a cylindrical shape, weld the end faces of the plate that meet in the cylinder axis direction when bent into a cylindrical shape, and finish the welded parts, resulting in low production efficiency and uniformity. Mass production of the product was difficult.

Furthermore, when seam joints, that is, bending joints are performed in can manufacturing, etc., the thickness of the overlapped portion of the material takes on a linear shape, which not only impairs the aesthetic appearance but also causes problems in terms of functionality. .

In the present invention, a cylindrical body to be processed is inserted into one of a pair of embossing rollers having a symmetrical uneven pattern on the outer circumferential surface, the other is pressed against the outer surface of the cylindrical body with the pattern phase matching, and both rollers are By rotating the cylindrical body in opposite directions at the same speed while maintaining pressure contact to form an uneven pattern on the circumferential surface of the cylinder, and then grinding the surface of the convex pattern, a uniform perforation pattern is easily created on the circumferential surface of the cylindrical body. This provides a method that can be used to form

The present invention will be specifically described below based on embodiments shown in the drawings.

FIGS. 1 and 2 show a device used to carry out the present invention, that is, an embossing machine for a cylindrical body. In this embossing machine, the base end of a movable arm 2 is rotatably attached to one end of a fixed frame 1. The upper surface of the fixed frame 1 and the lower surface of the movable arm 2 are provided with bearings 11 and 21 corresponding to the upper and lower sides at a predetermined distance from the center or the pivot portion, respectively.
At 21, one end of a pair of embossing rollers 3 and 4 having a slightly longer overall length than the cylindrical body to be processed and a smaller outer diameter than the inner hole of the cylindrical body is rotatably fixed, and both rollers are 3,4
are parallel to each other and at right angles to the frame 1 and the arm 2.

The uneven pattern 31, 41 on the outer peripheral surface of each roller 3, 4 can be formed directly on the roller surface by known corrosion processing, or a metal cylinder with an uneven pattern formed thereon can be removably fitted onto the roller shaft like a rolling machine. It is possible to match the uneven pattern of both rollers 31.41
are formed so that they match at the contact points of the rollers 3 and 4 and always fit together.

A rotary drive device 5 is connected to both rollers 3 and 4, and although a manual type using a bundle is also possible, the drawing shows an electric type.

That is, a variable speed electric motor 51 is installed on one side of the fixed frame 1.
On the other hand, a transmission gear 52 and a transmission gear 53 such as a helical gear are fixed to the end of the pivot shaft 12, and the transmission gear 52 and the drive gear 54 of the morph rotation shaft are connected with an endless chino. At the same time, a driven gear 32.42 such as a helical gear is fixed to the shaft end of each roller 3, 4, and each driven gear 32.4
2 and the transmission gear 53 are connected via a plurality of intermediate gears 55 and 56 such as helical gears that are fixed to the side surfaces of the frame 1 and the arm 2, and both rollers 3 and 4 are moved in opposite directions at the same circumferential speed. It rotates.

At the tip of the fixed frame is a gap adjustment mechanism 6 that sets the gap between the upper and lower rollers 3 and 4 to be large or small according to the thickness of the cylindrical wall of the cylindrical body to be embossed, and at the tip of the movable arm 2 is an operation bundle 7.
It is equipped with

However, when forming the embossed pattern on the cylindrical body 8, the gap between the upper and lower rollers 3.degree.

First, operate the bundle 7 of the movable arm 2 to lower the presser foot.

The holder 4 is separated above the roller 3, and the cylindrical body 8 to be processed is
After the support is inserted onto the shaft body of the roller 3 from the free end of the roller, when the presser roller 4 is joined to the cylindrical body 8, the uneven pattern 31° 41 of both rollers 3 and 4 will sandwich the cylindrical wall of the cylindrical body 8. They are pressed together with the same pattern phase.

Next, when the rotary drive device 5 is operated, both rollers 3.4 rotate in opposite directions at the same circumferential speed while keeping the pressure contact constant by the gap adjustment mechanism 6, and as shown in FIG. An uneven pattern 81 is formed on the circumferential surface, and both rollers 3,
4 is designed to rotate by a rotation angle corresponding to the circumferential length of the cylindrical body 8 and then stop, or if the pattern is made such that they interlock even if the rotation is continued, an uneven pattern 81, that is, an embossed pattern is formed on the entire circumferential surface of the cylindrical body 8. It can be done.

To form a perforated pattern on the cylindrical body 8, after forming an uneven pattern 81 on the circumferential surface of the cylindrical body 8 by the method described above, the cylindrical body is removed from the roller 3, and the cylindrical body 8 is moved as shown in FIG. Fix it to a suitable fixture and rotate it in the direction of arrow A.

Further, the whetstone 9 rotating at high speed in the direction of arrow B is connected to the cylindrical body 8.
By grinding the surface of the convex pattern 82 or 83 protruding from the outer or inner surface of the cylindrical body 8, and grinding the tip of the convex pattern, the cylindrical body as shown in FIG. A uniform perforation pattern 84 can be easily formed on the entire circumferential surface of 8.

When grinding the convex pattern 82 protruding from the outer circumference of the cylindrical body 8,
The fixture for the cylindrical body uses a round shaft that fits tightly into the inner surface of the cylindrical body, and a grindstone 9 is applied from the outer periphery as shown in FIG.

In addition, when grinding the convex pattern 83 protruding from the periphery of the cylindrical body,
The fixture for the cylindrical body uses a shaft with a round hole that tightly fits the outer surface of the cylindrical body, and grinds the inner surface of the cylindrical body by applying an internal grindstone to the inner surface of the cylindrical body.

When the grinding depth of the grindstone is equal to the thickness of the cylindrical wall,
As shown in Figure 6, a perforated pattern is formed on the circumference, but when the grinding depth is smaller than the thickness of the cylinder wall, an interesting patterned cylinder with perforations only at the top of the convex pattern is formed. It can be formed.

The perforation pattern 84 is etched as necessary to remove burrs or edges around the perforation, and
At this time, perforations are performed by etching if necessary.

Although the illustrated embossing machine is of a cantilever type in which one end of the pair of rollers 3.4 is supported by a shaft and the other end is a free end, the embossing machine is not limited to this, and it is of course possible to support both ends. In this case, the end of the roller 3 on the driving device side is supported by a fixed bearing, and the other end is supported by a removable bearing (not shown) on the shaft end of the roller 3.

In this case, the cylindrical body can be inserted into and removed from the roller, and the pressing force between the rollers 3 and 4 can be strengthened.

Although not shown in the drawings, in actual practice, a fine adjustment mechanism for displacing the roller 3 in the circumferential direction is provided between the axial end of one of the pair of rollers 3 and 4 and the driven gear 32. This allows fine adjustment of the pattern matching between both rollers 3 and 4.

As described above, in the present invention, the cylindrical body 8 is fitted into one of a pair of embossing rollers 3.4, and the other roller 4 is pressed against the roller 3 via the cylindrical body 8 with the pattern phase matching. The rollers 3 and 4 are rotated in the same direction at the same circumferential speed while maintaining pressure contact to form an uneven pattern on the circumferential surface of the cylindrical body 8, and then the surface of the uneven pattern is ground to form a through hole. Therefore, it is possible to directly form a perforation pattern on the circumferential surface of a cylindrical body using the conventional method of forming a perforation pattern on a flat plate and then bending it into a cylinder and welding or seaming the seams. Compared to conventional methods, uniform products can be mass-produced efficiently.

The perforated pattern is formed by rotating a cylindrical body with a convex pattern on its surface, and bringing a high-speed rotating grindstone close to grinding the convex pattern surface. By adjusting the grinding depth, the top surface of the convex pattern can be created. It is also possible to form a hole pattern with holes of a desired diameter.

[Brief explanation of the drawings] Figure 1 is a slope view, Figure 2 is a plan view, Figure 3 is a rear view, Figure 4 is a front view showing how the embossed pattern is formed, and Figure 5 is a perforated pattern. FIG. 6 is a front view showing the state of formation, and a cross-sectional view of a cylindrical body on which a perforated pattern is formed. 1... Fixed frame, 2... Movable arm, 3... Roller, 31... Uneven pattern, 4... Roller, 41. ...Pattern, 5.
... Rotation drive device, 8 ... Cylindrical body, 81
...Uneven pattern, 82...Perforation pattern.

Claims (1)

[Claims] 1. Fit the cylindrical body into one of a pair of embossing rollers that have a length corresponding to the cylindrical body to be processed and an outer diameter smaller than the inner diameter of the cylindrical body and rotate with the pattern phase on the circumferential surface matching, and After pressing the other roller onto the circumferential surface of the roller, both rollers were rotated at the same speed in opposite directions to form an uneven pattern on the circumferential surface of the cylindrical body, and then the pressure between both rollers was released and the cylindrical body was extracted from the roller. After that, while rotating the cylindrical body, a grindstone rotating at high speed is brought close to the convex pattern surface of the cylindrical body at a predetermined distance, and the convex pattern is ground, thereby forming a perforated pattern on the circumferential surface of the cylindrical body. A method for forming a perforated pattern on a cylindrical body.