JPH0576607U - Cross roll mill mill spindle - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Regarding a mill spindle that transmits rotational driving force to a roll in a cross roll mill by a universal joint, the upper roll and the lower roll are rotated at the same angular velocity to keep the rolling speed constant. The tension fluctuation of the rolled material between the adjacent rolling mills is eliminated. [Structure] An upper roll 52 and a lower roll 62 crossed with each other are respectively driven by upper and lower drive shafts 58, 68 via an upper spindle 1, a lower spindle 11, an upper constant velocity universal joint 9, and a lower constant velocity universal joint 19. The rolled material 50 that rotates and passes between the upper and lower rolls is rolled. At this time, the horizontal roll-side bending angle θ ₃ of the upper and lower rolls and the upper and lower spindles and the horizontal driving shaft-side bending angle θ _{4 of the} upper and lower drive shafts and the upper and lower spindles are not the same, but the upper and lower connecting portions are respectively Since the constant velocity universal joints 9 and 19 are provided, there is no angular velocity difference between the vertical drive shaft, the vertical spindle, the vertical spindle, and the vertical roll, and the rolling speed of the rolled material 50 is kept constant.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mill spindle for transmitting a rotational driving force by a universal joint to a roll in a cross roll rolling machine in which upper and lower rolls cross each other.

[0002]

[Prior Art]

 FIG. 4 is a plan view showing the concept of an example of a roll and a mill spindle of a conventional cross roll rolling machine, FIG. 5 is a sectional view of one side of the mill spindle seen from the side, and FIG. 6 is a roll of a conventional cross roll rolling machine. It is a diagram which shows the angular velocity difference with a drive shaft.

As shown in FIG. 4, the upper roll 52 and the lower roll 62 are crossed at a cross angle α around the central portion C in the roll axial direction, and can be vertically moved by vertical drive shafts 58 and 68 of a drive device (not shown). The joints 59 and 69 and the upper and lower spindles 51 and 61 are rotated to roll the rolled material 50.

Due to the crossing of the upper and lower rolls 52 and 62, the upper and lower rolls 52 and 62 and the upper and lower spindles 51 and 61 have a horizontal roll-side bending angle θ ₃ , and the vertical drive shafts 58 and 68 and the upper and lower spindles 51. , 61 form a bending angle θ ₄ on the drive shaft side in the horizontal direction.

As shown in FIG. 5, the upper and lower spindles 51, 61 and the upper and lower connectors 53, 54, 63, 64 are in their fitted upper and lower end portions 51a, 53a, 54a, 61a, 63a. , 64a and upper and lower cross pins 55, 65 which are inserted and attached over the respective end portions, and are connected by vertical universal joints 59, 69.

The upper and lower rolls 52 and 62 and the upper and lower connectors 53 and 63 are detachably connected to each other through oval holes and shafts, and the vertical drive shafts 58 and 68 and the upper and lower connectors 54 and 64 are keys 57, They are fixed by 67 respectively.

The vertical spindles 51 and 61, the vertical rolls 52 and 62, and the vertical drive shafts 58 and 68 form vertical bending angles θ ₁ and θ ₂ .

[0008]

[Problems to be solved by the device]

When the upper and lower rolls 52 and 62 are rotated by the upper and lower drive shafts 58 and 68, an angular velocity difference is generated between the upper and lower spindles 51 and 61, the upper and lower rolls 52 and 62, the upper and lower spindles 51 and 61, and the upper and lower drive shafts 58 and 68, respectively. However, in a rolling mill in which the upper and lower rolls 52 and 62 are parallel to each other, the vertical folding angles θ ₁ and θ ₂ of the upper and lower rolls 52 and 62 sides of the upper and lower universal joints 59 and 69 and the upper and lower drive shafts 58 and 68 sides, respectively. Since they are the same in the opposite direction, they are offset by each other, and there is no difference in angular velocity between the vertical drive shafts 58 and 68 and the vertical rolls 52 and 62.

However, in the conventional cross roll rolling mill in which the upper roll and the lower roll are crossed around the central portion C in the axial direction of the roll, as shown in FIG. Since the horizontal roll-side bending angle θ ₃ of 52 and 62 and the horizontal driving-axis side bending angle θ _{4 of the} upper and lower spindles 51 and 61 and the vertical drive shafts 58 and 68 are different, In the vertical joints 59 and 69 using the upper and lower cross pins 55 and 65 as shown, an angular velocity difference as shown in FIG. 6 occurs between the upper and lower drive shafts 58 and 68 and the upper and lower rolls 52 and 62.

When this angular velocity difference occurs, the angular velocities in the rotations of the upper and lower rolls 52 and 62 become uneven between the phase angles of 0 ° to 360 ° (one rotation).

Therefore, the traveling speed of the rolled material 50 is also non-uniform, and in the case of a tandem rolling mill, there arises a problem that the tension of the rolled material 50 varies between the rolling mills adjacent to each other.

The present invention solves the disadvantages of the above-mentioned conventional technology, and rotates the upper roll and the lower roll at the same angular velocity to keep the rolling speed constant, and performs rolling between the adjacent rolling mills in the tandem rolling mill. The purpose is to eliminate fluctuations in material tension.

[0013]

[Means for Solving the Problems]

 As a structure for achieving the above-mentioned object, the mill spindle of the cross roll rolling machine of the present invention is configured such that the upper and lower rolls cross each other in a plane whose axes are parallel to the rolling plate surface. In a mill spindle in which an upper and lower drive shafts for driving rolls are connected by an upper and lower spindle and an upper and lower universal joint, respectively, the driving side and the driven side are rotated at equal angular velocities to the respective upper and lower connecting portions. The feature is that a universal joint is provided.

[0014]

[Action]

 The mill spindle of the cross roll rolling machine of the present invention is constructed as described above, and the upper and lower rolls whose axes are crossed with each other in the plane parallel to the rolling plate surface are vertically moved by the vertical drive shafts. Rolls rolling material that rotates between a spindle and a constant velocity universal joint and passes between upper and lower rolls.

At this time, the horizontal roll-side bending angle of the upper and lower rolls and the upper and lower spindles and the horizontal driving shaft-side bending angle of the upper and lower drive shafts and the upper and lower spindles are not the same, but Since each of the constant velocity universal joints is provided, there is no difference in angular velocity between the vertical drive shaft and the vertical spindle, and between the vertical spindle and the vertical roll, and the upper and lower rolls rotate at the same angular velocity, The rolling speed can be kept constant.

[0016]

【Example】

 Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. 1 is a plan view showing the concept of a mill spindle of a cross roll mill of the present invention, FIG. 2 is an enlarged vertical sectional view of the same mill spindle, and FIG. 3 is a sectional view taken along line III-II1 of FIG.

In these drawings, 1 is an upper spindle, 11 is a lower spindle, crowning gears 1a and 11a are formed on the outer circumferences of both end portions, and the holes formed in the axial centers of both end surfaces respectively , Thrust pins 5 and 15 and springs 6 and 16 are internally mounted.

The respective crowning gears 1a and 11a are meshed with the gears 3a, 4a, 13a and 14a provided on the inner circumferences of the ends of the upper and lower connectors 3, 4, 13 and 14, respectively, and the respective spindles 1, 1 11 The spherical surfaces 5a, 15a of the thrust pins 5, 15 inserted into the holes at the axial centers of both end faces are pressed against the upper and lower connectors 3, 4, 13, 14 by springs 6, 16.

The crowning gears 1a and 11a, the gears 3a, 4a, 13a and 14a, the thrust pins 5 and 15, and the springs 6 and 16 constitute vertical and constant velocity natural joints 9 and 19 on the roll side and the drive shaft side, respectively. To be done.

Oval-shaped shaft portions 52a and 62a at the driving side end portions of the upper roll 52 and the lower roll 62 are detachably attached to the oval holes 3a and 13a formed in the shaft centers of the upper connector 3 and the lower connector 13, respectively. Has been inserted into.

The upper drive shaft 58 and the lower drive shaft 68 are fixed to the upper connector 4 and the lower connector 14 by the keys 57 and 58, respectively.

As shown in FIG. 1, the upper and lower rolls 52 and 62 are crossed with each other at a required cross angle α about a central portion C in the roll axial direction in a plane parallel to the plate surface of the rolled material 50. The upper and lower spindles 1 and 11 and the upper and lower rolls 52 and 62 form a horizontal roll-side bending angle θ ₃ , and the upper and lower spindles 1 and 11 and the upper and lower drive shafts 58 and 68 are A drive shaft side bending angle θ ₄ is formed.

The relationship between the two bending angles θ ₃ and θ ₄ is θ ₃ = α + θ ₄ , and when the upper and lower rolls 52 and 62 are crossed to form a cross angle α, θ ₃ > θ ₄ is satisfied.

As shown in FIG. 2, the vertical spindles 1 and 11 and the vertical rolls 52 and 62 and the vertical drive shafts 58 and 68 are formed with vertical bending angles θ ₁ and θ _{2 in the} vertical direction. There is.

Next, the operation of this device will be described. The vertical drive shafts 58, 68 are respectively rotated by a drive device (not shown), and the vertical rolls 52, 68 are passed through the vertical connectors 3, 4, 13, 14 and the vertical constant velocity universal joints 9, 19 and the vertical spindles 11, 11. 62 is rotated and the rolled material 50 is rolled.

At this time, the roll side bending angle θ ₃ and the drive shaft side bending angle θ ₄ are not the same, but the upper and lower rolls 52 and 62, the upper and lower drive shafts 58 and 68, and the upper and lower spindles 1 and 11 are connected to each other. Since the upper and lower constant velocity universal joints 9 and 19 are provided in the section, an angular velocity difference occurs between the upper and lower drive shafts 58 and 68, the upper and lower spindles 1 and 11, and the upper and lower spindles 1 and 11 and the upper and lower rolls 52 and 62. Without this, the upper roll 52 and the lower roll 62 rotate at the same angular velocity, and the rolling speed becomes constant.

Each of the vertical constant velocity universal joints 9 and 19 meshes with its crowning gears 1a and 11a and gears 3a, 4a, 13a and 14a, and the respective bending angles θ ₁ , θ ₂ , θ ₃ and θ. _{Even if 4} changes, torque is transmitted freely.

The present invention is not limited to the above-mentioned embodiment, and any type of constant velocity universal joint may be adopted.

[0029]

[Effect of the device]

 As described above, according to the mill spindle of the cross roll rolling mill of the present invention, the upper and lower rolls for rolling, the upper and lower spindles connected to the rolls, the vertical drive shaft for driving the rolls, and the upper and lower spindles connected thereto are connected to each other. Even if the roll side bending angle and the drive shaft side bending angle of each connecting part are different, the angular velocity difference between the driving side and the driven side does not occur due to the installation of constant velocity universal joints Therefore, the upper roll and the lower roll can be rotated at the same angular velocity to keep the rolling speed constant.

Therefore, it becomes possible to eliminate the tension fluctuation of the rolled material between the adjacent rolling mills in the tandem rolling mill.

[Brief description of drawings]

FIG. 1 is a plan view showing the concept of a mill spindle of a cross roll rolling mill according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of the mill spindle of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view showing the concept of a mill spindle of a conventional cross roll rolling mill.

5 is a cross-sectional side view of the mill spindle of FIG. 4 as viewed from the side.

FIG. 6 is a diagram showing a difference in angular velocity between a roll and a drive shaft of a conventional cross roll rolling mill.

[Explanation of symbols]

1 Upper spindle 1a, 11a Crowning gear 3,4 Upper connector 3a, 4a, 13a, 14a Gear 5,5 Thrust pin 6,16 Spring 9 Upper constant velocity universal joint 11 Lower spindle 13,14 Lower connector 19 Lower constant velocity universal joint 50 Rolled material 52 Upper roll 58 Upper drive shaft 62 Lower roll 68 Lower drive shaft α Cross angle θ ₁ , θ ₂ Vertical bend angle θ ₃ Roll side bend angle θ ₄ Drive shaft side bend angle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masahiro Oda 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City Mitsubishi Heavy Industries Ltd. Hiroshima Works

Claims (1)

[Scope of utility model registration request] 1. A vertical spindle and a vertical universal joint for the upper and lower rolls and a vertical drive shaft for driving the roll in a cross roll rolling machine in which the axes of the upper and lower rolls cross each other in a plane parallel to the rolling plate surface. In the mill spindle connected by, a constant velocity universal joint for rotating the driving side and the driven side at equal angular velocities is provided at each of the upper and lower connecting portions, and the mill of the cross roll rolling machine is characterized in that spindle.