JPH0270305A - Roll stand for three way rolling - Google Patents

Abstract

PURPOSE:To extend a pitch circle diameter of a sun gear to a large value and to bring a roll draft adjusting amount to be sufficiently large by performing transmission of power through a hypoid gear. CONSTITUTION:When rotating power is inputted from a driving source to an input shaft 17, the power is transmitted from a driving side hypoid gear 14 to respective planet gears 9 through respective follower side hypoid gears 13, a sun gear 10. Rolling rolls 2 are rotatively driven by rotation of the planet gears 9 through a rotation shaft 4. In the case the shaft 4 for radial position adjustment of the rolls 2 revolves to center an eccentric shaft axis, transmission of rotative power is performed without hindrance because planet gears 9 mush the sun gear 10 and revolve.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a roll stand used for rolling wire rods and steel bars, which comprises three rolling rolls arranged at three positions on the outer periphery of a rolling material pass line. related to things.

(Prior art) In a three-way rolling roll stand, each rolling roll is driven to rotate and needs to be moved in the radial direction to adjust the amount of rolling reduction, so the rotating shaft of the rolling roll is interlocked and connected to a drive source. , it is necessary to be able to move and position freely in the radial direction. This kind of three-way rolling roll stand was developed in 1976-346.
It is disclosed in Publication No. 9.

In this case, there is no problem if the three roll rotation shafts are respectively linked to separate drive sources, but a problem occurs when the three rolls are rotated by a single drive source.

That is, the above-mentioned publication discloses a structure shown in FIG. 3. In this case, a bevel gear 30'' is provided and meshed with the rotating shaft 3'' of each rolling roll 2'', and one rotating shaft 3' is connected to a drive source M via the bevel gear 30''. Also,
The rotating shaft 3' is supported via an eccentric bearing (not shown) whose rotation can be freely adjusted, and can be freely moved and positioned in the radial direction by revolving around an eccentric shaft that is parallel to the center of rotation. A sun gear 31° is formed on the inner periphery of each bevel gear 30°, and meshes with a planetary gear 32° on the outer periphery of the rotating shaft 3°, so that even if the rotating shaft 3° moves in the radial direction, ,
Since the planetary gear 32" revolves around the sun internal gear 31", each bevel gear 30" does not need to move in the radial direction, and by maintaining proper meshing of the bevel gears 30", the rotating shaft 3" Rotationally driven.

(Problems to be Solved by the Invention) In the conventional system, the amount of radial movement of the rotating shaft 3' is determined by the difference in pitch circle diameter between the sun internal gear 31' and the planetary gear 32'. However, the radial dimension of the sun internal gear 31' is limited by the circumference of the bevel gear 30' whose radial dimension is limited by the speed and space of the rotating shaft 3", and the planetary gear 32' is also limited by strength etc. Therefore, it is necessary to make the diameter at least approximately the same as the rotation axis 3°, and the difference in pitch circle diameter cannot be too large.Therefore, there is a problem that the amount of rolling reduction adjustment of the roll 2° is small.

(Means for Solving the Problems) The present invention is characterized by a three-way rolling roll stand equipped with three rolling rolls 2 arranged at three positions on the outer periphery of a rolling material pass line, each rolling roll 2 is equipped with a rotating shaft 4 orthogonal to the pass line direction, and each rotating shaft 4 can be freely moved and positioned in the radial direction by revolving around an eccentric axis parallel to the rotation center, and one end of each rotating shaft 4 has a In a three-way rolling roll stand, in which a planetary gear 9 and a sun gear 10 that mesh with each other are interlockingly connected, and each rotating shaft 4 is interlockingly connected to a single drive source via the sun gear 10, the sun gear 10 are interlocked with each other, and each driven hypoid gear 13 is meshed with a single driving hypoid gear 14, and this driving hypoid gear 14 is rotationally driven by the drive source.

(Function) When the drive-side hypoid gear 14 is rotationally driven, the rotational power is transmitted from the driven-side hypoid gear 13 to each planetary gear 9 via the sun gear 10, and the rotation of the planetary gear 9 causes rolling through the rotating shaft 4. Roll 2 is rotationally driven.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIGS. 1 and 2 show a three-way rolling roll stand, which is equipped with three rolling rolls 2 arranged at equal intervals at three positions on the outer periphery of the rolling material pass line in a casing l.

An eccentric shaft 3 is inserted into each rolling roll 2, and this eccentric shaft 3
, the rotation axis 4 perpendicular to the pass line direction is the hair ring 1.
It is inserted eccentrically through 6.

Each eccentric shaft 3 is rotatably supported by the casing 1, and the first
Bevel gears 5 that mesh with each other are concentrically provided at both ends of the upper eccentric shaft 3 in the figure and at the upper ends of the left and right eccentric shafts 3. Further, an arc-shaped worm wheel 6 is attached to the lower end of the eccentric shaft 3 on the right side in FIG. The adjustment shaft 8 is rotatably attached to the casing 1.

As a result, when the adjusting shaft 8 is rotated, the rotation is transmitted from the eccentric shaft 3 on the right side in FIG. Since the center of the rotating shaft 4 is eccentric, the rotating shaft 4 revolves around the eccentric shaft and is moved in the radial direction, so that the rolling amount of the rolling roll 2 is adjusted.

Next, rotational power is transmitted to the rolling roll 2 from a single drive source (not shown).

That is, a planetary gear 9 is concentrically attached to one end of each rotating shaft 4, and a sun gear 10 that meshes with the planetary gear 9 is provided on the inner periphery of one end of the interlocking shaft 11.

Each interlocking shaft 11 is concentric with the eccentric shaft 3, and the bearing 1
It is rotatably supported by the casing 1 via 2.

Further, a driven hypoid gear 1 is provided on the outer periphery of each interlocking shaft 11.
3 is provided.

A single driving hypoid gear 14 that meshes with each driven hypoid gear 13 is rotatably supported by the casing 1 via a bearing 15. An input shaft 17 is supported by the casing 1, and an input hypoid gear 18 that meshes with the drive-side hypoid gear 14 is provided at one end of the input shaft 17.

As a result, when rotational power is input from the drive source to the input shaft 17, the power is transmitted from the hypoid gear 14 to each driven hypoid gear 13 and sun gear 10 to each planetary gear 9 on the driving side. The rotation drives the rolling roll 2 through the rotating shaft 4 .

Further, in order to adjust the radial position of the rolling roll 2, the rotating shaft 4 was made to revolve around an eccentric shaft. In this case, the planetary gear 9 meshes with the sun gear 10 and revolves, so there is no problem in transmitting rotational power.

(Effects of the Invention) According to the present invention, bevel gears are not used to transmit power from the - sun gear to other sun gears, and power is transmitted via hypoid gears, so the pitch diameter of the sun gear is It is possible to make the roll reduction adjustment amount sufficiently large.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a three-way rolling roll stand according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a schematic configuration of a three-way rolling roll stand according to a conventional example. It is a diagram. 2... Rolling roll, 4... Rotating shaft, 9... Planetary gear, 10... Sun gear, 13... Driven side hypoid gear, 14... Driving side hypoid gear. Patent applicant: Kobe Steel, Ltd. Figure 3

Claims (1)

[Claims] (1) A three-way rolling roll stand equipped with three rolling rolls (2) arranged at three positions on the outer periphery of the rolled material pass line, each rolling roll (2) having a rotating shaft ( 4), each rotating shaft (4) can be freely moved and positioned in the radial direction by revolving around an eccentric axis parallel to the center of rotation, and is meshed with one end of each rotating shaft (4). The planetary gear (9) and the sun gear (10) are interlocked and connected, and each rotating shaft (
4) is interlocked and connected to a single drive source, in which a driven hypoid gear (13) is connected to each of the sun gears (10), and each driven hypoid gear (13) is connected to a single drive source. The drive side hypoid gear (14) meshes with the drive side hypoid gear (14).
A three-way rolling roll stand characterized in that 4) is rotationally driven by the drive source.