JPS6268613A - Roll driving device for rolling mill - Google Patents

Abstract

PURPOSE:To improve a rolling efficiency of a rolling mill by equipping common spindle couplings on a roll driving unit of the rolling mill to drive all of work rolls, intermediate rolls or reinforcing rolls. CONSTITUTION:The spindle couplings 2-1, 2-2 equipped on output shafts of the driving unit 3 are constituted to be freely capable of expanding and contracting in the axial direction and capable of attaching to and detaching from the work rolls 6, 7, intermediate rolls 8, 9 and reinforcing rolls 10, 11. In the state of rolling, according to the kind of rolling material 12, large or small diameter rolls 6, 7 are used, and the rolling is performed by a method wherein when using the large diameter rolls 6, 7, the rolls 6, 7 are used as the driving ones and when using the small diameter rolls 6, 7, the rolls 8, 9 or the rolls 10, 11 are used as driving ones. In this way, the rolling efficiency is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a driving device for a roll of a rolling mill of a rolling facility.

[Background of the invention]

The technique described in JP-A-52-140449 is an example of a conventional roll drive device for a rolling mill.

In the rolling equipment, the rolling efficiency of the rolling mill can be lowered by lowering the rolling force, and the shape of the rolled material can be easily turned to the side.

If rolling is performed using small-diameter work rolls, less rolling force is required.

In addition, it is desirable to use small diameter work rolls in a rolling mill that rolls materials with high deformation resistance.

For this reason, the upper working roll number is made smaller in diameter.
It is impossible to drive the small-diameter work roll due to problems with the strength of the drive mechanism and the strength of the small-diameter work roll itself, so it is necessary to drive only the lower large-diameter work roll.

Single-roll drive has problems such as a reduction in rolling transmission power, non-tailing motion, and slip between the roll and the material to be rolled, and has the drawbacks that it is not suitable for rolling extremely thin plates or materials with high resistance to ship change.

[Purpose of the invention]

The purpose of the present invention is to use a common spindle coupling for large-diameter work rolls for rolled materials with relatively low deformation resistance, and for small-diameter work rolls for rolled materials with high deformation resistance such as special steel. It is an object of the present invention to provide a rolling mill that can improve rolling efficiency, product shape, and plate thickness accuracy by rolling.

[Summary of the invention]

The present invention provides a rolling mill that rolls both ordinary steel and special steel, which have significantly different properties, by using large-diameter work rolls for ordinary steel and small-diameter work rolls for special steel. It can be rolled efficiently and stably, and the surface quality of the rolled material can be improved.
Focusing on the fact that it is possible to obtain products with good flatness,
Due to dimensional restrictions, when using a large diameter work roll, the work roll drive, and when using a small diameter work roll, the spindle coupling outer diameter must be less than the work roll diameter.
Since it is not possible to increase the transmitted power due to strength reasons, it is possible to switch to intermediate roll or reinforcing roll drive for rolling.

The switching has the advantage that the rolling speed and motor rotational speed can be kept unchanged even though work rolls, intermediate rolls, or reinforcing rolls of different diameters are driven by changing the tooth ratio using a clutch built into the drive machine.

[Embodiments of the invention]

FIG. 5 is an overall plan view of the rolling mill.

Rolling mill main body 1, spindle coupling 2. drive machine 3,
It is composed of a coupling 4 and an electric motor 5.

FIG. 6 is a view from the ■-■ arrow in FIG. 5.

Rolling mill body 1. Inside are upper work roll 6 and lower work roll 7.
, upper intermediate roll 8, lower intermediate roll 9, upper reinforcing roll lO
A lower reinforcing roll 11 is disposed, and a rolled material 12 is rolled between the upper and lower work rolls.

This figure shows a case where a large diameter work roll is used, and the work roll can be driven.

FIG. 7 is a view taken along the ■-■ arrow in FIG.

This figure shows the case where a small diameter work roll is used.

In the case of work roll drive, the outer diameter of the spindle coupling must be less than or equal to the work roll diameter.

If the diameter of the work roll is small, the transmitted power will be reduced.
As shown in this figure, an intermediate roll drive system will be used.

FIG. 8 is a detailed view of the spindle coupling 2 of FIG. 5.

Spindle coupling boss 1 shrink-fitted to the drive output shaft
3. Spline inner cylinder 14. Spring 15, spring precent rond 16. Spline outer cylinder 17・middle・
It is composed of four eaves 18 and a roll-side oval boss 19.

FIG. 1 shows the internal structure of the driving machine 3 of the present invention.

An input shaft 24 is driven by the feeder via the coupling 4 .

When the shifter coupling 25 meshes with the coupling teeth of the high-speed rotation side gear 20 as shown in the figure, the input shaft 2
4 is transmitted to the output pinion 21, and the output shaft 26 rotates at high speed.

On the other hand, the shifter coupling 25 is connected to the low speed rotation side gear 22.
, the power of the input shaft 24 is transmitted to the output pinion 23, and the output shaft 26 rotates at a low speed.

In other words, in the case of work roll drive, the roll diameter is small, so it rotates at high speed, and in the case of intermediate roll drive, the roll diameter is large, so it rotates at low speed, which has the advantage of being able to roll without changing the rolling speed and motor rotation speed. There is.

FIG. 2 is a view from the ■-■ arrow in FIG. 5.

Figure 3 shows the details of the shifter coupling part, Figure 4 shows the details of the shifter coupling part.
It is an IV-IV arrow directional view of a figure.

Figures 2 and 3 show the direction of the shifter coupling 25;
This section explains the operation in the ■direction.

The cylinder 30 is attached to a bracket 531 fixed to the casing of the drive machine 3.

An arm 28 connected to a bottle 34 is attached to the tip of the rod of the cylinder 30, and this arm is fixed to the arm 32 and a key by a key.
Movement in the direction, ■ direction is transmitted.

A cam follower 33 is fixed to the tip of the arm 32,
It is inserted into the central groove of the shifter coupling 25.

The bracket 29 is fixed to the casing of the drive machine 3 and supports the shaft 27.

Next, the operation will be explained.

By feeding pressure oil into the A chamber of the cylinder 30, the cylinder rod moves in parallel in the direction of the cylinder.

This parallel motion is converted into a rotational motion by the arm 28.32, and is further replaced by a parallel motion in the direction of the shifter coupling 25 by a cam follower 33 fixed to the arm 32 inserted into the central groove of the shifter coupling 25. Ru.

When pressure oil is inserted into chamber B of cylinder 30.

The movement is opposite to that of the queen, and the shifter coupling 25 moves in the O direction.

Therefore, rolling can be performed without reducing the transmitted power without replacing the spindle coupling by driving the intermediate roll when using a very small diameter work roll, or by driving the work roll when using a large diameter work roll.

In addition, when using either large-diameter work rolls or small-diameter work rolls, in order to be able to roll without replacing the spindle coupling, the spindle coupling is axially shifted when the drive roll is shifted in the axial direction. It is made to be expandable and retractable (for example, it has built-in splines and springs) so that it can be followed.

〔Effect of the invention〕

According to the present invention, it is possible to drive any of the work roll, intermediate roll, or reinforcing roll without changing the driving machine and spindle coupling.

[Brief explanation of drawings]

Claims (1)

[Claims] 1. The multi-high rolling mill is characterized by being equipped with a switching mechanism and an axially expandable spindle so that any of the work rolls, intermediate rolls, or reinforcing rolls can be driven. A roll drive device for a rolling mill.