JPH0459963B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inclined roll support device that can be used for inclined rolls such as two-roll type piercers and reelers, three-roll type equalizers, and elongators.

[Conventional technology]

Conventionally, in the inclined roll support device, as shown in FIG. 4, a pair of yokes 13 are provided on the cradle 2 so as to be movable back and forth toward the material pass line in parallel to each other.
Each yoke 13 is provided with a bearing mounting portion 14 having a spherical seat centered at the inner center.
A bearing 15 having a spherical outer periphery is slidably fitted inside the bearing 15, and the roll 10 is pivotally supported via the bearing 15, and the yoke 13 is attached to the tip of the threaded rod 12 by the traction mechanism 11. I'm forcing it.

[Problem to be solved by the invention]

However, since the bearing 15 is installed in the yoke 13 and supported by a spherical seat, the roll intersection angle θ (the angle between the roll axis and the material path line)
When increasing, the roll diameter D must be increased relative to the roll crossing angle θ in order to secure the minimum necessary gap L between the material and the yoke 13, etc. In a three-roll type rotary mill, the minimum dimension of the rolled material is determined by the roll diameter, so if the roll diameter is large, it is not possible to roll small diameter materials. Further, since the outer circumferential portion of the bearing and the bearing mounting portion of the yoke require difficult spherical machining, the machining cost is high.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an inclined roll support device that allows the roll diameter to be made small relative to the roll crossing angle θ and allows for a larger roll crossing angle.

[Means to solve the problem]

The present invention provides a cradle with a pair of yokes that are movable back and forth parallel to each other toward the material pass line.
In an inclined roll support device in which a bearing is movably mounted on each yoke and a roll is pivotally supported between the yokes via the bearing, a trunnion portion is lined up and projected toward the material pass line at the front end of the yoke. and the trunnion part is provided with bearing parts that are mutually concentric and whose bearing center lines extend in a direction perpendicular to the material pass line direction; a trunnion shaft extending from the trunnion shaft, the trunnion shaft is mounted on the bearing part of the trunnion part, and the bearing is rotatably mounted between the trunnion parts; The front surface of the yoke is formed into a cylindrical surface centered on the trunnion shaft portion, and the bearing and the front surface of the yoke are slidably abutted on this cylindrical surface, and the tip of the trunnion portion is retracted into the bearing. It is something.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, reference numeral 1 denotes a pair of yokes, which are provided on the cradle 2 so as to be movable back and forth parallel to each other toward the material pass line.

At the front end of each yoke 1, trunnion parts 3 are arranged and protruded toward the material pass line, and the trunnion parts 3 include bearing parts that are concentric with each other and whose bearing center lines extend in a direction perpendicular to the material pass line direction. 5 is provided. Further, the front surface 4 of the yoke between the trunnion parts 3 is formed into a cylindrical surface centered on the bearing part 5 of the trunnion part 3.

Reference numeral 6 designates a bearing, and a trunnion shaft portion 7 is provided on the side surface of the bearing 6 so as to protrude from the side surface thereof, and the trunnion shaft portions 7 are concentric with each other and extend in a direction perpendicular to the bearing center line.
is formed on a cylindrical surface centered on the trunnion shaft portion 7.

This bearing 6 is rotatably attached between the trunnion parts 3 by mounting a trunnion shaft part 7 on the bearing part 5 of the trunnion part 3 . The bearing rear surface 8 is in slidable contact with the yoke front surface 4. On the other hand, the tip of the trunnion portion 3 is formed to be retracted into the bearing 6, that is, to be located on the side opposite to the material pass line from the bearing front surface 9.

Reference numeral 10 denotes a roll, which is rotatably supported between the yokes 1 via a bearing 6, and is placed at a position facing the material pass line by setting the bearing position using a traction mechanism 11 and a threaded rod 12.

In the above configuration, during rolling, a rolling reaction force and a thrust force act on the bearing 6, but the rolling reaction force is generated between the bearing rear surface 8 and the yoke front surface, which are formed on a cylindrical surface centered on the trunnion shaft portion 7 and are in contact with each other. 4, the bending moment is directly transmitted to the yoke 1 through the trunnion portion 3, and no bending moment acts on the trunnion portion 3. The thrust force is mainly received by the trunnion portion 3.

In addition, since the bearing front surface 9 is formed into a cylindrical surface centered on the trunnion shaft portion 7, and the trunnion portion 3 is recessed from this bearing front surface 9, the necessary minimum gap is created between the material and the bearing front surface 9. Since the rolls can be arranged while ensuring L, rolls 10 with a small diameter can be used in relation to the roll intersection angle θ.

〔Effect of the invention〕

As described above, the present invention can reliably receive the rolling reaction force and thrust force acting on the bearing, and
Since the roll diameter can be made smaller in proportion to the roll intersection angle, the entire mill, including the cradle diameter and date shear roll diameter, can be made smaller, and a ripple effect can be expected, such as the ability to roll small-diameter materials with a three-roll type rotary mill. In addition, a larger roll intersection angle can be obtained, and spherical processing is not required, leading to a reduction in processing costs.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are a front sectional view taken along the line I, a right side view of a partial sectional view, and a plan sectional view taken along the line I, showing an embodiment of the present invention. FIG. 4 is a partially sectional plan view showing a conventional example. 1... Yoke, 2... Cradle, 3... Trunnion part, 4... Yoke front, 5... Bearing part, 6
... bearing, 7 ... trunnion shaft section, 8 ... bearing rear surface, 9 ... bearing front surface, 10 ... roll.

Claims (1)

[Claims] 1 A pair of yokes are provided on the cradle so that they can move back and forth in parallel to each other toward the material pass line, a bearing is movably attached to each yoke, and a roll is pivotally supported between the yokes via the bearing. In the roll support device, trunnion parts are arranged and protruded from the front end of the yoke toward the material pass line, and bearings are provided on the trunnion parts concentrically with each other and whose bearing center lines extend in a direction perpendicular to the material pass line direction. Established a department,
and protruding from a side surface of the bearing, the trunnion shaft portions being concentric with each other and extending in a direction perpendicular to the bearing center line;
The trunnion shaft portion is attached to the bearing portion of the trunnion portion, and the bearing is rotatably mounted between the trunnion portions, and the bearing and the front surface of the yoke between the trunnion portion are centered on the trunnion shaft portion. 1. A tilted roll support device, characterized in that it is formed into a cylindrical surface, the bearing and the front surface of the yoke are slidably abutted on the cylindrical surface, and the tip of the trunnion portion is retracted into the bearing.