JPH024361B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention relates to the structure of a roll head in a planetary inclined roll rolling mill, and more specifically, it relates to a structure of a roll head in a planetary inclined roll rolling mill. This relates to a structure for adjusting the rolling position of the roll.

(Prior Art) As shown in FIG. 4, the basic structure of a planetary inclined roll rolling mill is that at least three conical rolls 4 are equiangularly arranged around the material A to be rolled, and the rotation of the rolls 4 is It is configured to draw the material A to be rolled by revolution, and the material to be rolled is drawn in each of three or more roll heads 1 of three or more roll shafts 2 equipped with the rolls 4 mounted on the rotor 21. A, and the rotor 21 is mounted on a hollow shaft 23 relative to a fixed housing 22 on the foundation.
The rotor 21 is driven by a main drive device via a bevel gear set 24, and the conical roll 4 is driven by an auxiliary drive device via a bevel gear set 25 via a hollow shaft 23. The sun gear 26 of the hollow shaft 23, the planetary gear 27 meshing therewith, and the bevel gear set 1 are rotated.
4 and 15 in conjunction with the roll shaft 2.

By the way, in the structure of the roll head 1 of the conventional rolling mill of this type, as shown in FIG. 29, and is also rotatably supported at a predetermined position in the gear shaft 28 via a bush 30. A threaded relationship 33 with a reduction screw 31 moves the roll shaft 2 in the thrust direction. It is moved so that the rolling reduction of the roll can be adjusted when changing the exit diameter or installing a ground roll. Therefore, there are the following problems.

(1) The structure of the rolling reduction adjustment mechanism for the rolls is complex, and the switching mechanism between normal rolling and rolling reduction adjustment is difficult to understand, especially in terms of design, and in practice, it is difficult to perform reliable switching operations in a short period of time.

(2) Due to the internal structure of the roll head, the reduction adjustment device is located at the top of the roll head, so a large centrifugal force is generated by the rotation of the rotor, which adversely affects the strength of the roll head and rotor.

(3) The combination of the roll shaft and roll moves along the shaft axis during the reduction adjustment, which complicates the structure of the torque transmission part, and also increases the complexity of the roll shaft sliding part mechanism and the cooling water/scale sealing mechanism. becomes complicated.

(4) If the switching mechanism for normal rolling and reduction adjustment is automated or enlarged, hydraulic or pneumatic cylinders will have to be used, but the piping for this will become extremely complex and reliability will be poor when centrifugal force is taken into account. becomes scarce.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-mentioned points, and eliminates the conventional roll reduction adjustment mechanism described above and replaces it with a predetermined thickness between the roll and the roll shaft that holds it. The purpose of this invention is to simplify the structure and reduce the weight of the roll head by making it possible to adjust the rolling position of the roll by loading a spacer therein.

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

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, the rolls and the A chevron-shaped tooth profile with tooth traces extending radially from the center is formed on each opposing end surface of the roll shaft to be held, and a chevron-shaped tooth profile that can mesh with the chevron-shaped tooth profile is provided on both sides between these rolls and the roll shaft. The spacer for adjusting the rolling position of any thickness can be removably loaded and fixed integrally with a tension bar, and the exit diameter can be changed or changed by replacing the spacer with a spacer of a different thickness as appropriate. This allows the reduction to be adjusted.

(Function) Since it is possible to remove the reduction adjustment device that was conventionally provided in the upper part of the roll head (at a position far from the center of rotation of the rotor), it is possible to reduce the generation of centrifugal force when the rotor rotates. In addition, when changing the exit diameter according to the rolling conditions or adjusting the rolled down position of the roll according to the amount of roll grinding, a spacer of a specified thickness is loaded between the roll and the roll shaft, and the tension bar is used to integrate the roll. By fixing it, the required roll rolling position is secured.

(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 within this roll head 1 a roll shaft 2 is rotatably supported by a bearing 3.

Reference numeral 4 denotes a conical roll, and this roll 4 is attached to the tension bar 6 by threaded portions 4' and 6' formed between them with a spacer 5 interposed on the lower end surface of the roll shaft 2. It is a disc body with a tension bar insertion hole 5a bored in the center, and has chevron-shaped tooth profiles 7 on both sides of which tooth traces extend radially from the center as shown in FIG. Further, the end faces of the roll 4 and the roll shaft 2 that are joined to the spacer 5 are also formed with chevron-shaped tooth profiles 8 and 9 corresponding to the chevron-shaped tooth profile 7. As shown in FIG. 2, the spacer 5 is detachably attached to the roll 4 in advance with bolts 10, but the thickness of the spacer 5
Ti is the dressing (grinding) number i of roll 4
Corresponding to , it is determined by the following formula.

Ti=To+i×ΔTo Ti: Thickness of i-th spacer To: Thickness of spacer when new roll ΔTo: Dressing amount/times 11 is a support sleeve, and this sleeve 11 is attached to the shaft end in the roll shaft 2 and the upper end of the tension bar 6. The roll 4 and spacer 5 are interposed between the washer 12 and are integrally fixed to the roll shaft 2 by tightening a nut 13. 1
4 is a bevel gear fixed to the upper end of the roll shaft 2, and this bevel gear 14 is a bevel gear 15 of an auxiliary drive device.
mesh with. 16 is a seal between the lower end of the roll head 1 and the roll shaft 2.

In the above embodiment, the roll 4 is fixed to the roll shaft 2 by the threaded portions 4' and 6' formed between the two, but it may also be fixed by using a hydraulic or pneumatic cylinder mechanism. good.

(Effects of the Invention) The present invention has the following effects with the above-described configuration.

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

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

(3) The roll head is replaced periodically for maintenance purposes, and the capacity of the crane used for this purpose is small, and the building can also be made smaller.

(4) Since there is no need to slide the roll shaft in the axial direction as in the past, there is no wear or sealing trouble caused by this, and the sealing mechanism can also be simplified.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the roll head of the present invention, Fig. 2 is an enlarged sectional view of the roll portion, Fig. 3 is a view taken along the line A-A in Fig. 2, and Fig. 4 is a planetary inclined roll rolling machine. FIG. 5 is a sectional view showing the basic structure of a conventional roll head. 1...Roll head, 2...Roll shaft,
3... Bearing, 4... Conical roll, 5... Spacer, 5a... Insertion hole, 6... Tension bar,
7, 8, 9...Chevron tooth profile, 10...Bolt, 11
...Support sleeve, 12...Washer, 13...
...Natsuto, 14,15...Bevel gear, 16...Sealing.

Claims (1)

[Scope of Claims] 1. A planetary inclined roll rolling machine in which at least three conical rolls are equiangularly arranged around a material to be rolled, and the material to be rolled is drawn and rolled by rotation and revolution of the rolls. In this step, a chevron-shaped tooth profile with tooth traces extending radially from the center is formed on each opposing end surface of the roll and a roll shaft holding the roll, and the chevron-shaped tooth profile is formed on both sides between these rolls and the roll shaft. A spacer for adjusting the rolling position of any thickness, which has a chevron-shaped tooth profile that can be engaged with the machine, is removably loaded and fixed integrally with a tension bar, and is replaced with a spacer of a different thickness as appropriate. A roll head for a planetary inclined roll rolling mill, characterized in that the diameter of the exit side can be changed or the rolling reduction can be adjusted by rotating the roll head.