JPH0346205B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a support device for an inclined roll such as a piercer roll.

[Conventional technology and its problems]

In the piercer, the material is pierced by the plug and advances at an increased speed at the piercer exit due to the reduced cross section. As the material speeds up, the roll circumferential speed should be higher on the material exit side than on the material input side in order to match the change in material speed, that is, the circumferential speed ratio should be increased. It is effective to make the angles cross.

However, conventionally, as shown in FIG. 5, the roll 1 has chucks 20 and 21 on the material inlet side and the material outlet side (or the yoke on the material inlet side and the yoke on the material outlet side) of the integrated yoke 5. As the roll crossing angle r increases, the material will interfere with the chock case 20a on the material entry side, so if the roll crossing angle is increased further, the roll diameter must be increased. This method has disadvantages in that the equipment is bulky, the cost is high, and the ratio of the roll diameter to the material diameter exceeds the optimum ratio, leading to a deterioration in the quality of the perforated shell.

Therefore, it is possible to support the roll only on the material exit side without supporting it on the material input side and the material exit side, but since the rigidity of the roll shaft part cannot be maintained sufficiently, this may cause the inconvenience of uneven thickness of the perforated shell. I can't escape it.

[Purpose of the invention]

The present invention was made to solve the above-mentioned conventional problems, and an object of the present invention is to simultaneously reduce the diameter and increase the cross angle of the roll in a double-supported roll support structure.

[Means for solving problems]

In the inclined roll support device of the present invention, the cradle is provided with an integrated yoke that can move forward and backward toward the material pass line, and the support shaft that is inserted into the material entry side of the roll is integrated into the material entry side of the yoke. a material inlet side of the roll is supported by an inner bearing on the support shaft, and a roll shaft protruding from the material outlet side of the roll is supported by an outer bearing on the material outlet side of the yoke. It is characterized by the fact that

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is a cone-shaped roll, and a roll shaft 1a is concentrically and integrally protruded from the material outlet end of the roll 1, and a center hole 1b is bored in the material inlet end of the roll 1. A plurality of inner bearings 2 (two in the embodiment) and one inner sleeve 3 fitted into the inner race of the inner bearings 2 are installed in the center hole 1b.

Reference numeral 4 denotes a cylindrical or conical support shaft (cylindrical in the embodiment), which is integrally provided on the roll 1 side of the material entry side (inlet side support 6) of the integrated yoke 5, which will be described later. , is inserted into the inner sleeve 3. Note that the support shaft 4 may be coupled to the inner sleeve 3 if necessary.

The material entry side of the roll 1 is mounted on the inserted support shaft 4 via an inner bearing 2 and an inner sleeve 3, and is rotatably supported by the inner bearing 2. Note that a plurality of inner bearings 2 are used in order to suppress the deflection of the support shaft 4, and if there is no problem with the amount of deflection of the support shaft 4, the number of inner bearings 2 may be one. Further, the size (capacity) of the inner bearing 2 is determined by the magnitude of the rolling reaction force and the number of inner bearings 2 used.

The roll shaft portion 1a is attached to the material outlet side portion (outlet side support 7) of the yoke 5 via an outer bearing 8, and is rotatably supported by the outer bearing 8.

This roll 1 is connected to a drive shaft 10 via a face gear or key 9, etc., and is rotated via the drive shaft 10 by a drive device.

The yoke 5 has an entrance support 4 and an exit support 7 on both sides of the front part of the yoke body 11 with bolts 12,
13 and has a U-shape in plan view, and has a constant roll intersection angle adjusted by selecting attachment sets 4 and 7. Such an integrated yoke 5
are attached to the cradle 14 so as to be movable forward and backward with respect to the material pass line L, and are arranged opposite to each other with the material pass line L between them, and are brought into contact with the tip of the rod of the rolling down device by a traction device 15 (only the traction rod is shown). and is placed at a predetermined rolled down position.

Numerals 16 and 17 are seal members (oil seals in the embodiment) that prevent scale and the like from entering the inner bearing 2 and outer bearing 8.

(Function) The material is rotated in the direction of the arrow by a pair of rolls 1 having an inclination angle β and an intersecting angle γ.
It is pushed into the 8 side and pierced by the plug 18 to form a hollow shell. A rolling reaction force acts on the roll 1 during rotational rolling of such a material.

By the way, the roll 1 is supported by the inner bearing 2 via the support shaft 4 on the material entry side of the yoke 5, and the roll shaft 1 is supported on the material exit side of the yoke 5.
Since it is supported by the outer bearing 8 via the shaft a and is in a stable support state on both sides, it can sufficiently withstand the rolling reaction force.

Furthermore, since the bearing 2 on the material entry side is incorporated into the roll 1 and the support shaft 4 is provided protruding from the material entry side of the yoke 5, it has a compact support structure, so that, for example, 25°≦γ≦35 Even if the intersection angle becomes high with ゜,
It is possible to fully arrange the rolls so that the material does not interfere with the yoke 5, etc., and it is possible to use the rolls 1 with a small diameter in relation to the roll intersection angle.

〔Effect of the invention〕

As described above, the present invention can avoid interference between the material and the yoke while supporting the roll on both sides.
It can be used for rolling operations in the same way as conventional rolls, and the rolls can be made smaller in diameter and have a higher cross angle at the same time, improving product quality.

[Brief explanation of drawings]

FIG. 1 is a plan cross-sectional view showing an embodiment of the present invention, FIGS. 2, 3, and 4 are plan views showing how to use the invention.
A side view, a front view seen in the material path direction, and FIG. 5 are plan sectional views showing a conventional example. 1...Roll, 2...Inner bearing, 3...Inner sleeve, 4...Support shaft, 5...Yoke,
6...Entry side support, 7...Outside support, 8...
...outer bearing.

Claims (1)

[Claims] 1. The cradle is provided with an integrated yoke that can move forward and backward toward the material pass line, and a support shaft that is inserted into the material entry side of the roll is integrally provided on the material entry side of the yoke, and the An inclination characterized in that a material inlet side of the roll is supported by an inner bearing, and a roll shaft part protruding from the material outlet side of the roll is supported by an outer bearing on the material outlet side of the yoke. Roll support device.