JPS6152910A - 1-stand 3-pass multi-stage rolling mill - Google Patents

Abstract

PURPOSE:To improve the quality of a strip by making outside rolls small diameter and arranging offset and further reinforcing the work rolls by small rolls and back up rolls and sectional support rolls. CONSTITUTION:Outside work rolls 1, 4 are made to small diameter work rolls and set to become offset arrangement. Further, small diameter rolls 7 and sectional support type support rolls 8 are provided in offset side of the rolls 1, 4 to reinforce the small diameter rolls 1, 4 together with backup rolls 5, 6. By this mechanism, a strip 9 is passed and rolled in the state wound on large diameter rolls 2, 3 by half round respectively. Accordingly, no deformation occurs in work rolls 1-4 even when the large rolling force is applied and consequently a strip 9 of improved shape and quality can be obtained.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a technology that belongs to the elaborate industrial field of rolling metal strips, especially copper strips, and the contents disclosed in this specification are This is a proposal for an improved technique for one-stand three-pass rolling that is suitable for obtaining strips with good shapes.

(Prior art) A typical copper strip (hereinafter simply referred to as "strip") cold rolling equipment consists of several stands of rolling mills arranged in tandem, and although it has achieved significant advantages and results, Multiple arrays are often undesirable due to the drawbacks of increased equipment costs and maintenance costs, as well as constraints in terms of factory space.

For example, in rolling where the total reduction ratio exceeds 80%, 6
If it is a corrugated rolling mill, at least 4 stands are required.
′! If it is a 4-high rolling mill, at least 5 stands are required.

Based on such background technology, conventionally, Japanese Patent Application Laid-Open No. 56-171
A technique for performing high reduction rolling in one nutand as disclosed in No. 05 has been proposed.

FIG. 5 shows a typical example of such prior art.

In the drawings, numerals 21 and 22 are work rolls, 23 and 24 are backup rolls, and 25.2
6i each is a tension prydle roll and S is a strip.

As shown in this figure, Stritz 7'S in the prior art
C. It is configured to perform eight passes of rolling between the backup roll 24 and the work roll 2z, between the work rolls 22 and 21, and between the work roll z1 and the backup roll z8.

In addition, as a conventional rolling mill, as shown in Fig. 6, drive backup rolls 2ill and 24, which have the same dimensions as the backup roll of a normal 4-high rolling mill, and a small diameter that is a fraction of the diameter of a 4-high rolling mill. The work rolls 21 and 22 are arranged vertically, and the work rolls 21 and 22 are arranged offset, and a split support type support roll is connected to the small diameter roll on the offset side via the small diameter roll 27 and 28. 2
An fcW type with 9 and 30 parts has been proposed, but although the shape of the strip can be easily controlled, there remains the problem that it is not suitable for rolling ultra-thin sl-IJ tubular material with 1-height reduction. It had been.

(Problems to be Solved by the Invention) In short, in the conventional rolling technique shown in FIG. However, there was a problem in that it was difficult to obtain a strip with a good shape under so-called high rolling.

An object of the present invention is to propose a novel multi-high rolling means that can solve the above-mentioned problems.

(Friendly Means for Solving the Problems) In order to overcome the above-mentioned nine problems of the known one-stand eight-pass rolling technology, the present invention provides four rolls reinforced through backup rolls and bearings. In a 7C1 stand 8-pass type multi-high rolling mill, the work rolls are arranged in a vertical arrangement and rolling passes are formed between adjacent work rolls.

At least one of the work rolls located on the outer side is a small-diameter work roll, and is arranged at an offset position, and the offset work roll is perpendicular to the small-diameter roll and the split support type support roll located at the offset position. We have attempted to solve this problem by employing an L-stand three-pass multi-stage rolling mill that is reinforced with bank-up rolls that span the arrangement.

(Function) Figure i4 shows the relationship between rolling load and rolling reduction ratio for the rolling mill of the present invention and the conventional rolling mill. In this figure, the curve (A
) U An example of a conventional general 4-high rolling mill or a 0-high rolling mill, the curve (A)' shown in the figure shows an example of a Sendzimir rolling mill (20-high cluster rolling mill), and the curve (B) What is shown is an example of a conventional 1-stand 8-pass rolling mill, and the curve (C) is an example of a 1-stand 8-pass rolling mill of the present invention.

For example, when rolling with a rolling reduction of 40, the rolling mill of the present invention requires a rolling reduction of 600kp, whereas the Sendzimir rolling mill requires a rolling reduction of 9 to 1500, and this difference is used in the present invention. This makes it possible to apply high pressure without deteriorating the shape of the tube.

(Embodiment) FIGS. 1-(a) and (b) are block diagrams of a 10-high, 8-pass rolling mill showing a first preferred embodiment of the present invention. This rolling mill will be specifically explained below with reference to the drawings.

The 1-stand 8-pass 10-high rolling mill shown in Fig. 1 has 4
Book work rolls 1.2.8.4; The two outer work rolls are of small diameter, and backup rolls 5.6 are arranged vertically to reinforce the work rolls. The small diameter work roll 1°4 is set to have a large offset arrangement.

Offset each small diameter work roll 1.4 and small diameter roll on the t side? , 7 are provided with support rolls 8, 8 of the type shown clearly in FIG. And adjacent work rolls 1 and 2)
, (2 and 3>, and 8 and 4>, respectively, form eight rolling passes.

In other words, the strike IJ roll 9 is wound around each of the inner large-diameter work rolls 2.8 for n half turns, and is rolled and rolled in an unfinished state, and these work rolls constitute three rolling passes. .

Further, in the embodiment of the present invention shown in FIG. 2, the backup rolls 5 and 6 are connected to the offset small-diameter work rolls 4 and 4 via the intermediate rolls 4a and 4a, and the small-diameter rolls 7. Separately from the boat roll 8, the structure is of a box structure.

FIG. 8 shows another example of the embodiment of the present invention, and shows 4
Book work roll l, 1 on the outside top of 2.8.4
The one with the small diameter work roll 1 is OK, and the upper offset edge is the small diameter work roll 1iC? This is the same as the multi-high rolling mill of the first example in that split rolls 8 are provided.

(Effects of the Invention) As explained above, according to the present invention, even if the rolling blade is enlarged, the work roll does not deform, and even under a relatively high rolling reduction rate, the work roll can maintain an excellent shape. I-1)
This has the effect that rolling of the whelk can be easily achieved.

[Brief explanation of drawings]

Figure 1 - (a) and (b> are both 1 according to the present invention)
A front view (a) and a side view (t)l showing an example of a 10-stand 3-pass rolling mill, and FIG. 2 is a front view showing an example of a 12-high 3-pass rolling mill showing another embodiment of the present invention. , Figure 8 shows 1 stand 8 stages 3
A front view (a) and a side view (b) showing a pass rolling mill. FIG. 4 is a graph showing the relationship between rolling load and rolling reduction for the rolling mills of the present invention and the conventional rolling mill, and FIGS. 5 and 6 are
Both were made using a conventional EE rolling mill. This shows the 3-pass rolling machine (Fig. 5) and the offset 1-pass rolling machine (Fig. 6). 1.4...Small diameter work roll
2.8...Large diameter work roll 5.6...Backup roll 7...Small diameter roll 8...Divided support roll 9...Nutrip 21.22...Work rolls 23, 24...・Backup roll.

Claims (1)

[Claims] 1. Four work rolls reinforced through backup rolls and bearings are provided in a vertical arrangement, and a rolling pass is formed between each of the adjacent work rolls. In a one-stand three-pass multi-high rolling mill, at least one of the work rolls located on the outer side is a small diameter work roll, and is arranged at an offset position, and the offset work roll is located at an offset position. A one-stand three-pass multi-stage rolling mill characterized by reinforcement with small-diameter rolls, split support type support rolls, and vertically arranged backup rolls.