JPH0734960B2 - Ring rolling equipment - Google Patents

Description

The present invention relates to a ring rolling mill.

[Prior Art] As shown in FIG. 3, a conventional ring rolling apparatus that rolls a hollow shell a to form a ring material having a predetermined irregular cross section has a shaft b that is rotatably supported in parallel with each other. , c, a pair of hole-shaped rolls d, e having a relative shape suitable for each stage of the rolling process.
, The hollow shell a is inserted between the rolls d and e, and ring rolling is performed between the rolls d and e. As the rolling progresses, the rolls Rings are rolled in multiple stages by exchanging d and e with different sizes.

[Problems to be Solved by the Invention] However, in the above ring rolling, a hole-type roll exchange operation that requires time and labor must be performed at each stage from rough rolling to finish rolling, and therefore, However, there is a problem that it takes a long time to mold the ring material.

In view of the above-mentioned circumstances, the present invention significantly reduces the number of times of changing work of the hole-type rolls performed in each stage of the rolling process, and thus provides a ring rolling apparatus for saving labor and improving production efficiency. It was done.

MEANS FOR SOLVING THE PROBLEM The present invention provides a plurality of small-diameter rolls having different shapes rotatably arranged on the outer periphery of a roll base rotatably supported, and has a large-diameter hole facing the small-diameter roll. The mold roll is rotatably arranged.

[Operation] Therefore, in the present invention, the small-diameter roll arranged on the rotatable roll base can be rotationally moved to variously change the combination of the small-diameter roll and the large-diameter hole type roll depending on the rolling stage. Therefore, it is not necessary to remove the small diameter roll from the apparatus and replace it at each stage of rolling, and therefore ring rolling can be performed efficiently.

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

FIG. 1 and FIG. 2 show an embodiment of the present invention and show a ring rolling apparatus for producing a ring material having a modified cross section from the hollow shell 12. The ring rolling apparatus has an upper small-diameter roll device 1 and a lower large-diameter roll device 2, and the small-diameter roll device 1 includes an axial box 4 provided on an upper part of a vertical housing 3 and the axial box. 4, a rotary table 6 which is supported horizontally by 4 and has a drive device 5 at one end, and a roll table 7 in which a polygonal plate which stands in parallel with the rotary shaft 6 at a predetermined interval in the axial direction is fitted and fixed, and the roll table. The bearings 8 provided on 7 are rotatably supported at both ends, and are provided with four small-diameter rolls 10a, 10b, 10c, 10d having different shapes with a coupling 9 at one end. The small-diameter rolls 10a, 10b, 10c and 10d are arranged at equal intervals on the outer circumference of the roll base 7 equidistant from the center of the rotary shaft 6 and in the order from rough rolling to finish rolling, using the coupling 9 as necessary. It is constructed so that it can be driven by the drive shaft 11 connected thereto.

The large-diameter roll type roll device 2 includes the small-diameter rolls 10a, 10b,
A large-diameter hole roll 13 which is opposed to 10c and 10d and rolls by sandwiching a hollow shell 12 and rolling the large-diameter hole roll 13 with the rotary shaft 6
A shaft box which is rotatably supported at a predetermined position immediately below and is vertically slidable under the housing 3.
The shaft box 14 is configured so that it can be moved up and down by a reduction cylinder 15 for adjusting the thickness of the ring material, and the large diameter hole type roll 13 has a drive shaft 16 connected to one end thereof. It is configured to be driven by.

The hollow shell 12 formed into a cylindrical shape in the previous step is hung on the large-diameter roll 13 and the drive unit 5 is operated to rotate the roll base 7 to suspend the large hollow tube 12 suspended from the hollow shell 12. A small-diameter roll 10a for rough rolling is moved to a position directly above the radial-hole type roll 13 and a drive shaft 11 is connected to the small-diameter roll 10a by using a coupling 9, and then a reduction cylinder 15 is operated to operate a large-diameter hole. The die roll 13 is lifted up, and a pressing force is applied to the hollow shell 12 via the large diameter hole type roll 13, and a small diameter roll 10a and a large diameter hole are driven via drive shafts 11 and 16 by a driving device (not shown). By rolling the die roll 13 to start rolling and setting the stroke of the reduction cylinder 15 appropriately, the hollow shell 12 is rolled to a desired thickness.

Next, the reduction cylinder 15 is operated to operate the large diameter hole type roll 13
To lower a proper gap between the large-diameter roll 13 and the small-diameter roll 10a, remove the drive shaft 11 from the coupling 9 of the small-diameter roll 10a, and operate the drive device 5 again. A small-diameter roll suitable for the next rolling is provided directly above the large-diameter roll 13 on which the hollow shell 12 is suspended by rotating the roll base 7.
10b is moved, the drive shaft 11 is connected to the small-diameter roll 10b using the coupling 9, and then the reduction cylinder 15 is actuated to raise the large-diameter roll 13 and the large-diameter roll 13 And a rolling force is applied to the hollow shell 12 to rotate the small-diameter roll 10b and the large-diameter roll 13 via the drive shafts 11 and 16 by a drive device (not shown) to restart rolling, and the hollow shell 12 Is rolled to the desired thickness.

The same applies to the large-diameter hole type rolls, depending on the rolling stage.
10c or 1 for small diameter rolls that perform ring rolling in cooperation with 13
Switch to 0d and roll.

According to the above, the small-diameter roll can be changed by rotating the roll base equipped with the small-diameter roll, so that complicated roll replacement work such as removing the hole-shaped roll from the housing at each stage of rolling. It is possible to change various combinations of small-diameter rolls and large-diameter rolls by simply rotating the roll base equipped with small-diameter rolls,
It is possible to select a set of rolling rolls having an optimum relative shape according to the progress of the rolling process.

In addition, in the embodiment of the present invention, the case where four small-diameter rolls are arranged on the roll base has been described, but the number of small-diameter rolls may be four or more, and other deviations from the gist of the present invention. It goes without saying that various modifications can be made within the range not covered.

[Effects of the Invention] As described above, according to the ring rolling apparatus of the present invention, one rolling stand can exhibit the same ability as that of the conventional rolling stand with the same number of small-diameter rolls. Since the number of stand equipment can be reduced and there is no need to replace rolls at each rolling stage, the number of roll replacement operations can be significantly reduced, labor can be saved, and production efficiency can be improved. The excellent effect of can be achieved.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the ring rolling apparatus of the present invention,
FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is an explanatory view of a conventional ring rolling apparatus. In the figure, 1 is a small diameter roll device, 2 is a large diameter hole type roll device,
6 is a rotary shaft, 7 is a roll base, 9 is a coupling, 10a, 10
b, 10c and 10d are small-diameter rolls, 12 is a hollow shell, 13 is a large-diameter roll, and 15 is a reduction cylinder.

Claims (1)

[Claims] 1. A plurality of small-diameter rolls having different shapes are rotatably arranged on the outer periphery of a roll base rotatably supported, and a large-diameter roll is rotatably arranged facing the small-diameter roll. A ring rolling machine characterized by the above.