JPH0734959B2 - Ring rolling equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ring rolling apparatus which does not require roll replacement work.

[Prior Art] As shown in FIG. 3, a conventional ring rolling device for rolling a raw pipe ring c to produce a ring having a predetermined shape is equipped with axes a and b which are parallel to each other and rotatably supported. , A pair of hole-shaped rolls d and e having a relative shape suitable for each stage of the rolling process are fixed to each other, and a blank pipe ring c is provided between the hole-shaped rolls d and e.
Ring rolling between the hole-shaped rolls d and e by inserting, and as the rolling progresses, the hole-shaped rolls d and e are exchanged for ones of different sizes, and ring rolling is performed over a plurality of stages. .

[Problems to be Solved by the Invention] However, in the ring rolling apparatus described above, it is necessary to perform a hole-type roll exchanging operation that requires time and labor at each stage from rough rolling to finish rolling. Therefore, there is a problem that it takes a long time to manufacture the ring component.

The present invention has been made in view of the above circumstances and provides a ring rolling apparatus in which it is not necessary to replace the hole rolls at each stage of the rolling process.

[Means for Solving the Problems] According to the present invention, a pair of work rolls provided with a plurality of hole-shaped rolls having different shape dimensions on at least one side are arranged in parallel,
At least one of the pair of work rolls is supported so as to be shiftable in the axial direction.

[Operation] In the present invention, the shiftable work roll is shifted,
Since it is possible to variously change the combination of the predetermined hole roll of the work roll and the predetermined hole roll of the other work roll according to the rolling stage, it is not necessary to remove the hole roll from the device and replace it. Therefore, ring rolling can be performed efficiently.

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

FIGS. 1 and 2 show an embodiment of the present invention, in which a product ring having a rectangular cross section is manufactured from a raw pipe ring 1 having a width narrower than the width of the final product and having a dimension thicker than the product thickness. The ring rolling apparatus when doing is shown. The ring rolling apparatus has an upper work roll 2 and a lower work roll 3 which rotate in parallel with each other. Thus, the upper work roll 2 includes three convex minimum width hole rolls 4, intermediate width hole rolls 5 and maximum width hole rolls 6 fixed to the upper shaft 7 and having different width dimensions, Further, it is rotatably supported by a bearing box 9 which moves up and down by a rolling down device 8 which applies a rolling down force to the raw pipe ring 1, and is axially shifted by an upper work roll shifting cylinder 10 connected to one end of the upper shaft 7. It is possible and can be driven by a drive shaft 11 connected to the other end of the upper shaft 7.

The lower work roll 3 is fixed to the central portion of the lower shaft 13 and includes a concave hole type roll 12 having a groove width of the same size as the width of the product ring. A lower work roll shift cylinder 15 connected to one end of the shaft 13 allows axial shift, and is configured to be driven by a drive shaft 16 connected to the other end of the lower shaft 13. . Reference numeral 17 in the drawing is a housing.

Suspending the cylindrical tube ring 1 formed in the cylindrical shape in the previous step on the concave hole type roll 12 provided in the central portion of the lower shaft 13 and operating the upper work roll shift cylinder 10 to shift the upper work roll 2. Then, the minimum width hole type roll 4 among the convex type hole rolls is moved to just above the concave type hole roll 12 on which the raw pipe ring 1 is suspended, and then the reduction device 8 is operated to operate the upper shaft 7 Is applied to the raw tube ring 1 through the minimum width hole type roll 4 and a driving device (not shown) drives the upper shaft 7 and the lower shaft 13 through the drive shafts 11 and 16, Rotate each hole-type roll 4 and 12 to start rolling from the central portion of the raw pipe ring 1,
Roll the center part of the to the desired thickness and width.

Next, the reduction device 8 is actuated to raise the upper shaft 7, the minimum width hole type roll 4 is pulled up, and an appropriate gap is maintained between the minimum width hole type roll 4 and the concave type hole roll 12, The upper work roll shift cylinder 10 is operated again to shift the upper work roll 2, and the intermediate width hole roll 5 is moved right above the concave hole roll 12 on which the raw pipe ring 1 is suspended. The rolling down device 8 is operated to lower the upper shaft 7, and a rolling down force is applied to the raw pipe ring 1 via the intermediate width hole type roll 5 to locate a wider portion in the width direction of the central portion of the raw pipe ring 1. Roll to the desired thickness and width.

Then, the lowering device 8 is used to raise the upper shaft 7,
The intermediate width hole type roll 5 is pulled up, and the intermediate width hole type roll 5 is pulled up.
After keeping a proper gap between the concave hole type roll 12 and the concave hole type roll 12, the upper work roll 2 is shifted by operating the upper work roll shift cylinder 10 three times, and the hollow pipe ring 1 is suspended. Immediately above the hole type roll 12, the maximum width hole type roll 6
After that, the lowering device 8 is actuated again to lower the upper shaft 7, and a rolling force is applied to the entire width of the raw pipe ring 1 via the maximum width hole type roll 6 to obtain the full width of the raw pipe ring 1. Roll to the desired thickness and width.

During the above rolling, the upper work roll shift cylinder
The upper work roll 2 is appropriately shifted in the axial direction by operating 10 and the hole type roll 4 or 5 during rolling of the raw pipe ring 1 is reciprocated in the width direction of the raw pipe ring 1 to reciprocate the hollow roll 4. Alternatively, the width of the rolled portion of 5 may be increased.

According to the above, since the work rolls 2 and 3 provided with the hole-type rolls 4,5, 6 and 12 can be shifted, a complicated roll exchange such as pulling out the hole-type roll from the housing 17 at each stage of rolling. By changing the work rolls 2 and 3 without any work, the combination of the hole roll of one work roll and the hole roll of the other work roll can be changed in various ways, depending on the progress of the rolling process. It is possible to select a set of perforated rolls having the optimum relative shape.

In the embodiment of the present invention, the case where the upper work roll is shifted has been described. However, the lower work roll may be shifted, or both the upper and lower work rolls may be shifted. Of course, various changes can be made without departing from the spirit of the invention.

[Effects of the Invention] As described above, according to the ring rolling apparatus of the present invention,
Since it is not necessary to replace the hole-type rolls, the time required for rolling can be shortened, labor can be saved, and the production efficiency can be greatly improved.

[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 an explanatory view of the rolling process by each hole type roll of FIG. 1, and FIG. 3 is an explanatory view of a conventional ring rolling apparatus. In the figure, 1 is a blank ring, 2 is an upper work roll, 3 is a lower work roll, 4 is a minimum width hole type roll, 5 is an intermediate width hole type roll, 6 is a maximum width hole type roll, and 10 is an upper work roll. A shift cylinder, 12 is a concave hole type roll, and 15 is a lower work roll shift cylinder.

Claims (1)

[Claims] 1. A pair of work rolls provided with a plurality of hole-shaped rolls having different shapes and dimensions on at least one of them are arranged in parallel, and at least one of the pair of work rolls is supported so as to be shiftable in the axial direction. A ring rolling machine characterized by the above.