JPH07121402B2 - Ring material manufacturing method and apparatus - Google Patents

Description

The present invention relates to a method and an apparatus for manufacturing a ring material.

[Prior Art] As shown in FIG. 2 and FIG. 3, the conventional ring material manufacturing method and apparatus use a cylindrical base pipe 1 with side rolls 2 and 3 for preventing deflection and centering in the width direction. And the inclination angle θ of the ring member 4 to be manufactured
Ring rolling is performed between a pair of hole-shaped rolls 6 and 7 having a space 5 corresponding to the thickened portions at both ends as well as the taper portion, and the hole-shaped rolls 6 and 7 have higher dimensional accuracy as the process progresses. The ring material 4 having an accurate cross-sectional shape was manufactured by performing ring rolling a plurality of times while exchanging with the above.

[Problems to be Solved by the Invention] However, in the above-described conventional method and apparatus for manufacturing a ring material, the dimensioning in the thickness direction with respect to the raw pipe and the formation of the taper portion having the inclination angle θ and the formation of the end portion shape are performed. Since it was performed at the same time by using the hole-type roll as described above, it was not possible to apply an extremely large rolling-down force only to the end portion, so the thickness of the end portion is approximately the same as the thickness of the central portion. Only the same and simple shape could be formed, and the ring material having an arbitrary end shape could not be obtained.

Further, since the above-mentioned hole type roll can be used only for the production of one kind of ring material, in order to produce a plurality of ring materials having different shapes, the hole type rolls are individually applied to all kinds of ring materials. It had to be prepared, and the required number of hole type rolls was increasing.

In view of the above situation, the present invention makes it possible to obtain a ring material having an arbitrary end shape, such as having a complicated shape or an extreme thickness distribution, and also to use a hole type roll as a part of the hole material. An object of the present invention is to provide a ring material manufacturing method and apparatus capable of reducing the required number of mold rolls.

[Means for Solving Problems] In the present invention, a cylindrical raw tube is subjected to ring rolling using a hole-shaped roll to adjust the wall thickness distribution, and then another ring-shaped roller is used to adjust the ring thickness. The present invention relates to a method and an apparatus for manufacturing a ring material, which comprises rolling to give a bent shape and then width rolling using a side roll having grooves in the circumferential direction to adjust the end shape.

[Operation] Therefore, in the present invention, the shell is adjusted in its wall thickness distribution by ring rolling using a hole-type roll, and is then given a bent shape by ring rolling, and is then end-rolled by width rolling using a side roll. The shape of the part is adjusted.

As described above, by performing width rolling using the side rolls, a large rolling force can be applied only to both ends, and a ring material having an arbitrary end shape can be manufactured.

Further, since the thickness distribution is adjusted and the bending shape is imparted separately, when manufacturing ring materials having substantially the same thickness distribution but different bending shapes, the hole type roll for adjusting the thickness distribution is used. It is also possible to use the same as the above, and the required number of hole type rolls can be reduced.

[Examples] Examples 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.

Reference numeral 1 is a blank tube, 2 and 3 are side rolls, 8 and 9 are hole type rolls having a space for forming a ring material 4a having a required thickness dimension,
10, 11 are hole-shaped rolls having a space for forming a ring member 4b having a taper bend of an angle θ, 12 and 13 are support members, and 14 and 15 are rotatably supported by the support members 12 and 13. Grooves 16 and 17 having a shape corresponding to the end shape of the final ring material 4
Side rolls having 18 in the circumferential direction, 18 and 19 are support members 12 and 13
Cylinders for moving the side rolls apart, 20, 21 are side rolls 14, 15
Cylinders for moving up and down, 22 and 23 are bearings, and 24 and 25 are hole-type rolls having a space having a shape corresponding to the final ring material 4.

Next, the operation will be described.

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

Next, the ring material 4a having the adjusted wall thickness distribution is subjected to ring rolling between the hole-shaped rolls 10 and 11 with the inclination angle θ, and the ring material 4a
A taper bending is applied to a to form the ring material 4b.

Finally, the ring material 4b having the tapered bending is width-rolled between the side rolls 14 and 15 to adjust the end shape of the ring material 4b to manufacture the final ring material 4.

In this way, the side rolls 14 and 15 are provided with a width rolling function so that an extremely large rolling-down force can be applied only to both width end portions of the ring material 4b. Further, it is possible to form the ring material 4 having an arbitrary end shape such as the ring material 4 having an extreme thickness distribution at the ends.

Further, when manufacturing ring members 4 having substantially the same wall thickness distribution and different bending shapes, a hole-type roll for adjusting the wall thickness distribution
Can be used for both 8 and 9.

The present invention is not limited to the above-mentioned embodiment,
It goes without saying that various changes can be made without departing from the scope of the present invention.

[Effects of the Invention] As described above, according to the ring material manufacturing method and apparatus of the present invention, the side roll having the width rolling function allows the use of any end having a complicated end shape and an extreme thickness distribution. Shaped ring materials can be manufactured, and the thickness distribution is adjusted and the bending shape is given separately, so the thickness distribution is adjusted when manufacturing ring materials with almost the same thickness distribution but different bending shapes. Since it is possible to use the hole type roll for performing the above-mentioned process, it is possible to obtain an excellent effect such that the required number of the hole type roll can be reduced.

[Brief description of drawings]

FIG. 1 is an illustration of an embodiment of the present invention, FIG. 2 is an illustration of a conventional example, and FIG. 3 is an illustration of general ring rolling. In the figure, 1 is a blank tube, 4, 4a, 4b are ring materials, 8, 9, 10, 11, 24, 25 are hole type rolls, 14, 15 are side rolls, 16, 17 are grooves, 18, 19,
20, 21 are cylinders.

Claims (2)

[Claims] 1. A cylindrical raw tube is subjected to ring rolling using a hole roll to adjust the wall thickness distribution, and then subjected to ring rolling using another hole roll to give a bent shape. A method for producing a ring material, which comprises width-rolling a side roll having grooves in the circumferential direction to adjust the end shape. 2. A hole roll for adjusting a wall thickness distribution or for giving a bent shape, and a hole roll having a groove in the circumferential direction and capable of width rolling. Ring material manufacturing equipment.