JPH08294735A - Curling device - Google Patents

Abstract

PURPOSE: To achieve the appropriate curling to a dissimilar cylindrical body. CONSTITUTION: A roller 1 achieves the curling to a main body part of relatively large diameter at the end part of a dissimilar cylinder by being guided by a guide groove 14 of a disk-shaped cam 12 while the normal tangential contact condition is kept. The roller is oscillatable to a part of smaller diameter than that of the main body part, and the curling is achieved by being guided by a cam groove 16 formed on a part of the guide groove 14 while the roller is moved changing the angle so as to keep the tangential contact condition to the end part, leading to the smooth curling where the tangential contact condition is kept to the whole end part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curl molding device for forming a curl at the end of a cylinder, and more particularly to a curl molding device capable of curling the end of a deformed cylinder by a rotating roller.

[0002]

2. Description of the Related Art FIG. 9 is a vertical cross-sectional view showing an example of a conventional curl forming apparatus, and reference numeral 21 denotes an upper peripheral end portion 22a of a cylindrical body 22 having a processing groove 21a on its outer periphery. A plurality of rotating rollers for forming the curl 23, 24 is a rotating holder supporting each rotating roller 21, 25 is a rotating shaft supporting the rotating holder 24, and 26 is a rotating shaft 25 via a bearing 27. A base 28, which is supported so as to be possible, is a drive gear which is fixed to the rotary shaft 25 and receives a rotary drive force from a drive motor (not shown).

During the curling process, the rotary roller 21 is pressed against the upper peripheral end of the cylindrical body 22 which is the object to be processed to form the curl 23 conforming to the inner surface shape of the processing groove 21a.

[0004]

However, in the above-mentioned conventional apparatus, the movement trajectory of the rotary roller 21 is always a constant circular shape. Therefore, as shown in FIG.
Part 4 where the shape of the upper peripheral edge 40a of 40 is partly different in arc radius
If 0b has, the part where this arc radius is different
In 40b, the tangential contact state of the rotating roller 21 is no longer maintained (A part in FIG. 8), and the rotating roller 21 interferes with the upper peripheral end 40a of the workpiece 40, and the normal curl molding process is not performed. There is.

It is an object of the present invention to provide a curl molding device which can perform a proper curl molding process even on a deformed cylindrical body.

[0006]

In order to achieve the above object, the present invention is a curl molding device for curling a cylindrical end by a rotary roller, the rotary roller being swingably supported, and the rotary roller The guide for moving the cylindrical end to the cylindrical end is performed by a guide portion that causes the rotating roller to follow the shape of the product cylindrical end, and a cam portion that allows the rotating roller to move so as to maintain a tangential contact state at the product cylindrical end. Characterize.

[0007]

With the guide of the guide portion, the rotary roller performs curl molding while maintaining a tangential contact with the main portion at the end of the irregularly shaped cylinder, and the irregularly shaped portion having a diameter different from that of the main portion. Since the rotating roller can be swung, the curl molding is performed by changing the angle so as to maintain the tangential contact state with the end portion by the guide of the cam portion. Smooth curl molding with tangential contact maintained.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front sectional view of an embodiment of the present invention, in which reference numeral 1 denotes a plurality of grooves having a processing groove 1a on the outer periphery thereof and a curl formed on the upper end portion of a cylindrical body which is a workpiece. Rotating rollers, 2
Is a roller holding shaft that supports each rotating roller 1, 3 is a roller holding lever whose one end is rotatably supported by a roller holding shaft 2 via a bearing 4, and 5 is a roller holding lever 3.
A lever support shaft 6 rotatably erected on the other end of the lever support shaft 5, the lever support shaft 5 being fixed to the outer wall portion 6a thereof,
A hollow rotary holder having a vertical cross-section that is substantially convex, and 7
Is a support shaft that is inserted into the central hole of the rotary holder 6 and rotatably supports the rotary holder 6 via a bearing 8.
Reference numeral 9 denotes a bearing tube fixed to the base 10 for supporting a portion of the support shaft 7 protruding from the rotary holder 6, and 11 denotes the rotary holder 6.
The drive gear is fixed so as to rotate together with the drive gear and receives a rotational drive force from a drive motor (not shown).

Reference numeral 12 denotes a disc-shaped cam fixed to the lower surface of the expanded diameter portion 7a at the lower end of the support shaft 7, and is shown in the bottom view of the disc-shaped cam of FIG. 4 and the side view of the disc-shaped cam of FIG. As shown, the disc-shaped cam 12 has a first member fixed to the upper end of the roller holding shaft 2.
The driven roller 13 is loosely fitted and is formed so as to match the shape of the upper end of the cylindrical body to be processed, and its main portion 14a
Guide groove 1 with an arcuate shape with a smaller diameter at the corner 14b than
4 and the corner portion 14b having the smaller diameter, the guide groove 14 is bulged outward and is shallower than the guide groove 14 in order to guide a second driven roller 15 (see FIG. 2) described later. And the formed cam groove 16.

FIG. 2 is a side cross-sectional view of the rotary roller portion, one end of which is fixed to the roller holding shaft 2 and the other end of which is fixed a shaft 18 on which the second driven roller 15 is provided. And the second driven roller 15 is the cam groove of the guide groove 14.
When positioned at 16, the roller holding shaft 2 can be tilted with respect to the virtual perpendicular of the disc-shaped cam 12 (see FIG. 2).
Then, the rotary roller 1 fixed to the roller holding shaft 2 can also swing together with the roller holding shaft 2.

FIG. 3 is an explanatory view for explaining the installation state of the roller holding lever and the like when viewed from the bottom side. The roller holding lever 3 is rotatably supported by the lever support shaft 5, and the tension spring 19 is provided. The first driven roller 13 is urged by the roller holding shaft 2 toward the outside of the guide groove 14 and toward the cam groove 16.

The operation of the embodiment having the above configuration will be described.

For example, in the case of subjecting the cylindrical body 32, which is the workpiece having the peripheral end portion 32a as shown in FIG. 6 and which matches the guide groove 14 having the different circular arc shape shown in FIG.
By pressing the machining groove 1a of the rotary roller 1 against the peripheral end portion 32a and rotating the drive gear 11, the rotary holder 6 is rotated about the support shaft 7. Then, the lever support shaft 5,
An actuating force for moving along the guide groove 14 of the disk-shaped cam 12 is applied to the first driven roller 13 via the roller holding lever 3 and the roller holding shaft 2, and the first driven roller 13 follows the rotating roller. 1 forms a curl 32d as shown in FIG. 7 on a portion 32b having a relatively large radius of curvature in the peripheral end portion 32a.
When the first driven roller 13 reaches the portion 32c having a small radius of curvature at the corner of the peripheral end portion 32a, the second driven roller 15
Moves to the cam groove 16 and allows the roller holding shaft 2 to swing (see FIG. 2). Therefore, the rotary roller 1 held by the roller holding shaft 2 moves while changing the inclination angle in the radial direction (in this case, the outer direction) of the cylindrical body 32 that is the workpiece, and moves relative to the portion 32c. Curling is performed while maintaining tangential contact.

In this way, in the entire peripheral end portion 32a of the cylindrical body 32, the rotary roller 1 maintains the tangential contact state and performs the curl molding without applying an excessive force, so that the curl as shown in FIG. 32d is smoothly formed on the peripheral end portion 32a.

[0016]

As described above, the present invention is different from the main body portion and the guide portion that uses the rotating roller to perform the normal curl molding while maintaining the tangential contact state with the main body portion at the end portion. With the cam part that performs curl molding by changing the angle so as to maintain the tangential contact state even for the deformed portion of the diameter, it is possible to perform curl molding smoothly on various deformed cylinders. A device can be provided.

[Brief description of drawings]

FIG. 1 is a front cross-sectional view of an embodiment of a curl molding device according to the present invention.

FIG. 2 is a side sectional view of a rotary roller portion in the present embodiment.

FIG. 3 is an explanatory diagram for explaining an installation state of a roller holding lever and the like in this embodiment.

FIG. 4 is a bottom view of the disk-shaped cam in the present embodiment.

FIG. 5 is a side view of the disc-shaped cam in the present embodiment.

FIG. 6 is a plan view of an example of the workpiece after processing.

7 is a vertical cross-sectional view of the workpiece shown in FIG.

FIG. 8 is an explanatory diagram for explaining a contact state between a rotating roller and an end portion of a workpiece.

FIG. 9 is a vertical cross-sectional view of a main part and a workpiece for explaining a conventional curl forming device.

[Explanation of symbols]

1 ... Rotating roller, 1a ... Processing groove, 2 ... Roller holding shaft,
3 ... Roller holding lever, 5 ... Lever support shaft, 6 ...
Rotation holder, 7 ... Support shaft, 11 ... Drive gear, 12 ... Disc-shaped cam, 13 ... First driven roller, 14 ... Guide groove, 15
... second driven roller, 16 ... cam groove, 17 ... swing lever,
18 ... Shaft, 32 ... Cylindrical body, 32a ... Peripheral end, 32b ... Large diameter part, 32c ... Small diameter part, 32d ... Curl.

Claims (1)

[Claims] 1. A curl molding device for curling a tubular end by a rotary roller, wherein the rotary roller is swingably supported, and the rotary roller is guided to move with respect to the tubular end by a rotary roller. A curl forming device, characterized in that a curl forming device is provided with a guide portion that follows the shape of the end and a cam portion that allows the rotating roller to move so as to maintain a tangential contact state at the end of the product cylinder.