JPH01138007A - Method and device for manufacturing ring stock - Google Patents

Abstract

PURPOSE:To obtain an optional end shape and a thick wall ring stock by adjusting a wall thickness distribution of a cylindrical tube stock by grooved rolls and equalizing end shapes by edging by use of side rolls having a groove in the peripheral direction after imparting a bent shape to the stock by use of other grooved rolls. CONSTITUTION:A tube stock 1 is subjected to ring rolling between grooved rolls 8, 9 to equalize a wall thickness distribution of the stock 1 and to form a ring stock 4a. Then, the ring stock 4a is subjected to ring rolling between grooved rolls 10, 11 having a tilting angle theta to impart a tapered bending to the stock 4a to form a ring stock 4b. Finally, the stock 4b is edged between side rolls 14, 15 to equalize end shapes of the stock 4b to manufacture of a ring stock 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for manufacturing a ring material.

[Prior Art] As shown in FIGS. 2 and 3, a conventional method and apparatus for manufacturing a ring material involves rolling a cylindrical blank tube 1 in the width direction with side rolls 2 and 3 for centering and preventing deflection. The thickness dimension and inclination θ of the ring material 4 to be manufactured while guiding
Ring rolling is performed between a pair of grooved rolls 6.7 having a space 5 corresponding to the tapered part and the thick walled parts at both ends, and as the process progresses, the grooved rolls 6.7 are made with higher dimensional accuracy. By performing ring rolling multiple times while changing the ring material, a ring material 4 with an accurate cross-sectional shape was manufactured.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional ring material manufacturing method and apparatus, it is difficult to measure the dimensions of the raw tube in the thickness direction, form a tapered portion with an inclination angle θ, and form the end shape. Since the above-mentioned grooved rolls were used at the same time, it was not possible to apply an extremely large reduction blade only to the edges, so the thickness of the edges was approximately equal to the thickness of the center. It was only possible to form a ring material that was equal and simple in shape, and it was not possible to obtain a ring material with an arbitrary end shape.

In addition, the grooved rolls mentioned above can only be used to manufacture one type of ring material, so in order to manufacture multiple ring materials with different shapes, it is necessary to use the grooved rolls individually for all types of ring materials. Therefore, a large number of grooved rolls were required.

In view of the above-mentioned circumstances, the present invention makes it possible to obtain a ring material with an arbitrary end shape, such as a complicated shape or an extreme thickness distribution, and also makes it possible to form a hole by making it possible to use a part of the hole-shaped roll. It is an object of the present invention to provide a method and apparatus for manufacturing a ring material that can reduce the number of mold rolls required.

[Means for Solving the Problems] The present invention involves performing ring rolling on a cylindrical blank pipe using grooved rolls to adjust the wall thickness distribution, and then rolling the cylindrical blank pipe into rings using another grooved roll. The present invention relates to a method and apparatus for manufacturing a ring material in which, after rolling to give a bent shape, width rolling is performed using side rolls having grooves in the circumferential direction to adjust the end shape.

[Function] Therefore, in the present invention, the wall thickness distribution of the raw pipe is adjusted by ring rolling using grooved rolls, and then a bent shape is given by ring rolling, and then width rolling is performed using side rolls. The end shape is adjusted.

In this way, by performing width rolling using side rolls, it becomes possible to apply large rolling blades only to both ends, and a ring material having an arbitrary end shape can be manufactured.

In addition, since the adjustment of the wall thickness distribution and the imparting of the bending shape are performed separately, when manufacturing ring materials with different bending shapes with the wall thickness distribution between the paths, the hole shape for adjusting the wall thickness distribution can be adjusted. The rolls can be used in combination, and the number of grooved rolls required can be reduced.

[Implementation example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

1 is a raw pipe, 2 and 3 are side rolls, 8 and 9 are hole-shaped rolls provided with a space for forming a ring material 4a having a required thickness dimension, and 10.11 is a pipe for tapered bending at an angle θ. 12.13 is a support member; 14 and 15 are support members 12.
13, a side roll having a groove 18.17 in the circumferential direction having a shape corresponding to the final end shape of the ring material 4; 18.19 is a cylinder for moving the supporting member 12.13 toward and away from each other; 20.21 is a side roll 14.1
5 is a cylinder that lifts and lowers, 22.23 is a bearing, 24.2
Reference numeral 5 denotes a hole-shaped roll having a space corresponding to the shape of the final ring material 4.

Next, the operation will be explained.

First, the raw tube 1 is subjected to ring rolling between grooved rolls 8 and 9 to adjust the wall thickness distribution of the raw tube 1 and form the ring material 4a.

Next, the ring material 4a whose thickness distribution has been adjusted is subjected to ring rolling between grooved rolls 10 and 11 having an inclination angle θ to give a tapered bend to the ring material 4a to form a ring material 4b.

Finally, the tapered bent ring material 4b is width-rolled between the side rolls 14 and 15.
The final ring material 4 is manufactured by adjusting the end shape of b.

In this way, the side rolls 14 and 15 are provided with a width rolling function, and extremely large rolling edges are applied to only one width end of the ring material 4b. It is possible to form a ring material 4 having an arbitrary end shape, such as a ring material 4 having an extreme wall thickness distribution at the end portion.

In addition, when manufacturing a ring material 4 having a wall thickness distribution of different bending shapes between tracks, the grooved rolls 8 and 9 for adjusting the wall thickness distribution can also be used.

It should be noted that the present invention is not limited to the above-mentioned embodiments,
Of course, various changes may be made without departing from the spirit of the invention.

[Effects of the Invention] As described above, according to the method and apparatus for manufacturing a ring material of the present invention, the side rolls having a width rolling function can roll any edge having a complicated end shape and extreme wall thickness distribution. In addition, since the adjustment of the wall thickness distribution and the imparting of the bending shape are performed separately, it is possible to manufacture ring materials with different bending shapes depending on the wall thickness distribution. It is possible to also use the grooved roll for adjustment, and excellent effects such as reducing the number of grooved rolls required can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of a conventional example, and FIG. 3 is an explanatory diagram of general ring rolling. In the figure, 1 is a raw pipe, 4.4a, 4b are ring materials, 8, 9.1
0°11.24.25 is a grooved roll, 14.15 is a side roll, 16.17 is a groove, and 18.19 and 20.21 are cylinders.

Claims (1)

[Claims] 1) A cylindrical blank tube is subjected to ring rolling using grooved rolls to adjust the wall thickness distribution, and then ring rolling is performed using another grooved roll to adjust the bent shape. 1. A method for manufacturing a ring material, which comprises applying width rolling using side rolls having grooves in the circumferential direction to adjust the end shape. 2) A ring material comprising a grooved roll for adjusting wall thickness distribution or giving a bent shape, and a grooved roll having grooves in the circumferential direction and capable of width rolling. manufacturing equipment.