JPS60240312A - Roll screw-down device for planetary type cross helical rolling mill - Google Patents

Abstract

PURPOSE:To permit the easy screw-down operation of rolls and to reduce time by operating screw-down cylinders in accordance with screw-up mechanisms such as springs to screw-down the rolls and roll shafts holding said rolls so that the screw-down position of the rolls can be adjusted. CONSTITUTION:The roll shafts 5 holding the circular conical rolls 6 are inserted into gear shafts 2 fitted with bevel gears 4 for transmission of driving power in such a manner that said shafts can freely move axially and can rotate freely integrally with the shafts 2. The screw-up mechanisms 13 and the screw-down cylinders 9 are provided between the shafts 2 and 5. The mechanism 13 consists of a cylinder or spring which energizes the shaft 5 in the base end direction with respect to the shafts 2. Said cylinder 9 energizes the shaft 5 in the top end direction in accordance with the mechanism 13. A material A to be rolled is drawn and rolled by the rotation and revolution of the rolls 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rolling down device for rolls in a planetary inclined roll rolling mill.

(Prior Art) As shown in FIG. 2, the basic structure of a planetary inclined roll rolling mill is that at least three conical rolls 6 are arranged equiangularly around the material A to be rolled, and the rotation of the rolls 6 is It is configured to draw the material A to be rolled by revolution, and the material to be rolled A is drawn in each of three or more roll heads 1 disposed on the rotor 21 by the roll shaft 5 to which the roll 6 is attached. The rotor 21 is rotatably supported on a fixed housing 22 on the foundation via a hollow shaft 23, and the rotor 21 is driven by a main drive unit using a complete gear assembly. 24, and the conical roll 6 is driven by an auxiliary drive that rotates the hollow shaft 23 through a full gear set 25, and further rotates the hollow shaft 23 through a sun gear 26 of the hollow shaft 23, a planetary gear 27 meshing therewith, and a full gear set. This is done in conjunction with the roll shaft 5 via the set 28.4.

By the way, the roll heel 1 structure of the conventional rolling mill of this type,
In particular, in the roll lowering device, as shown in FIG. 3, a roll shaft 5 to which a conical roll 6 is attached via a tension bar 8 is moved relative to the gear shaft 2 in the axial direction via splines 2' and 5'. A reduction screw 3 is supported to rotate freely and together, and is also rotatably supported at a predetermined position within the gear shaft 2 via a bushing 29.
0, the roll shaft 5 is rotated in a predetermined direction together with the gear shaft 2 while the reduction screw 30 is fixedly connected to the roll head 1 by the clutch switching device 3I arranged at the upper end of the roll head 1. By moving the roll shaft 5 in the axial direction, the roll reduction adjustment of the roll is sometimes performed when changing the exit diameter or installing the ground roll. Therefore, there are the following problems.

(11) It is not possible to adjust the rolling reduction of the rolls during normal rolling.

(2) A clutch switching device for adjusting the roll reduction,
The roll head is far away from the center of rotation of the roll head.
Since it is located at the upper end, rotation of the rotor generates a large centrifugal force, which adversely affects the strength of the roll head and rotor.

(3) The structure of the roll reduction device is complicated, especially due to the design.
The switching mechanism for through rolling and rolling reduction adjustment is difficult to understand, and in practice, it is difficult to perform reliable switching operations in a short period of time.

(4) The clutch switching device has a complicated structure and a large number of parts, which complicates the overall structure of the roll head and increases manufacturing costs.

(Problems to be Solved by the Invention) This invention has been made in view of the above-mentioned points, and aims to enable the roll rolling operation during normal rolling operation, simplify the roll rolling operation, and shorten the operation time. In addition, the aim is to simplify the structure and reduce the weight of the roll head.

(Means for solving problems) The means for solving the above problems are as follows.

In the roll head of a planetary inclined roll rolling mill, in which at least three conical rolls are equiangularly arranged around the material to be rolled, and the material to be rolled is drawn and rolled by the rotation and revolution of the rolls, it is used for transmitting driving force. A roll shaft holding the roll is inserted into the gear shaft to which the bevel gear is attached so that it can move freely in the axial direction and rotate integrally with the gear shaft, and the roll shaft is inserted in the proximal direction with respect to the gear shaft between the two shafts. An uplifting mechanism consisting of a cylinder or a spring for urging, and a lowering cylinder for urging the roll shaft in the distal direction corresponding to the uplifting mechanism are provided.

(Function) According to the solution of the present invention, by operating the reduction cylinder in response to the uplift mechanism made of a cylinder or a spring, the roll and the roll shaft holding the same can be directly reduced by hydraulic pressure. The rolling position of the roll can be adjusted by

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

In FIG. 1, reference numeral 1 denotes a roll head held by a rotor 21, and a cylindrical gear shaft 2 is rotatably supported in the center of the roll head 1 by a bearing 3.

The gear shaft 2 also includes a bevel gear 2 on the rotor 21 side.
A hevel gear 4 meshing with 8 is mounted so as to be integrally rotatable.

Reference numeral 5 denotes a roll shaft to which a conical roll 6 is attached, and this roll shaft 5 penetrates through the gear shaft 2 so as to be movable in the axial direction and rotatable integrally through a spline 2 and 5 degrees formed between the two. The lower part of the roll shaft 5 is inserted into the bearing jacket 1a of the lower part of the roll head 1.
On the other hand, the upper part thereof is supported within the gear shaft 2 via a radial bearing 7 so as to be rotatable and vertically movable via a bush 3'. The conical roll 6 is integrally attached to the lower end surface of the roll shaft 5 by a tension bar 8 passing through the shaft 5. Reference numeral 9 denotes a reduction cylinder, and this reduction cylinder 9 is formed in an annular shape between the lower end of the gear shaft 2 and the roll shaft 5. The roll shaft 5 is rolled down. Reference numerals 11 and 12 are oil supply and drainage passages for the cylinder 9, and the other end of this oil supply and drainage passage 12 is connected to a hydraulic system (usually composed of an oil tank and a hydraulic pump, not shown).

In addition, when the roll rolling operation is not performed during normal rolling work, in other words, when the roll rolling operation is performed only when replacing the rolls, the oil supply and drainage passage 1 is installed in the appropriate place on the casing of the roll head 1.
A quick joint (not shown) with 1 may be provided, and a hydraulic device may be connected as necessary. By adopting such a structure, the length of the oil supply/drainage path provided in the rolling mill is shortened, and the number of places where a sealing mechanism is required is reduced, and in particular, troubles with the sealing mechanism can be avoided.

Reference numeral 13 denotes a spring as a lowering mechanism, and this spring 13 is stretched between the gear shaft 2 and a washer 14 which is secured to the upper end of the roll shaft 5 by a nut 15.
The combination of the roll shaft 5 and the roll shaft 5 is biased diagonally upward. Note that the lowering mechanism 11 may use a cylinder (not shown) instead of a spring.

Next, to explain the roll rolling down operation in the above embodiment, the rolling down amount of the roll 6 is adjusted by supplying or discharging hydraulic pressure to the rolling down cylinder 9 to move the roll 6 in the axial direction together with the roll shaft 5. Note that it is convenient to automatically control the stroke of the reduction cylinder 9 attached to each roll head using a hydraulic servo mechanism.

(Effects of the Invention) Since the present invention has the above-described configuration, it has the following effects.

fl1 Roll reduction operation can be performed even during normal rolling operation, so AGC (automatic gauge)
e Control).

(2) Because of the roll rolling down operation, there is no need for conventional pre-wiring operations such as stopping the rolling operation and fixing the rolling screw to the roll head using a clutch switching device, which can be used to lower the roll or shorten the rolling operation time. This allows the roll reduction adjustment time and replacement time to be shortened. Furthermore, since the rolls can be rolled down instantly, the rolled material can be easily released when rolling trouble occurs, and mechanical damage can be minimized.

(3) The internal structure of the roll head is simplified using fluorine, improving durability and reliability, and making the entire rolling mill more compact.

(4) The overall weight of the roll head can be significantly reduced, thereby reducing the generation of centrifugal force during rotation, and the rotational speed of the roll head can be considerably increased compared to the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the roll rolling device of the present invention, and FIG.
The figure is a sectional view showing the basic structure of a planetary inclined roll rolling mill.
FIG. 3 is a sectional view showing a conventional roll rolling device. 1... Roll head, 2... Gear shaft, 3...
・Bearing, 3'... Bush, 4... Bevel gear, 5
...Roll shaft, 6...Conical roll, 7...
Radial bearing, 8... Tension bar, 9... Reduction cylinder, 10... Pressure receiving plate, 11.12... Oil supply/drainage path, 13... Reduction mechanism (spring), 14... Washer , 15... Nando's. Patent applicant's agent name: Yoshihiro Tsunoda, patent attorney

Claims (1)

[Claims] In the roll head of a planetary inclined roll rolling mill, in which at least three conical rolls are equiangularly arranged around the material to be rolled, and the material to be rolled is drawn and rolled by the rotation and revolution of the rolls, it is used for transmitting driving force. A roll shaft holding the roll is inserted into the gear shaft to which the bevel gear is attached so that it can move freely in the axial direction and rotate integrally with the gear shaft, and the roll shaft is inserted in the proximal direction with respect to the gear shaft between the two shafts. Roll rolling of a planetary type 1 inclined roll rolling machine, characterized in that it is equipped with a rolling mechanism consisting of a biasing cylinder or a spring, and a rolling cylinder that biases a roll shaft in the tip direction corresponding to the rolling mechanism. Device.