JPS62118903A - Rolling method for steel plate having projection on both faces - Google Patents

Abstract

PURPOSE:To easily obtain a steel plate having projections on both faces in various relative positions by shifting the roll shafts of either one or both of upper and lower work rolls respectively disposed with plural calibers to the projecting positions to be obtd. CONSTITUTION:Either of the upper and lower work rolls 1 respectively disposed with the plural calibers is shifted axially to bring the positions of the calibers 3 of the upper and lower work rolls 1 to a prescribed relation. A plate material is rolled in this state, then the steel plate having the projections on both faces in various combinations of the relations of the projections 4 on both faces is obtd. The kinds for the disposition of the calibers 3 of the work rolls 1 are thus decreased.

Description

Detailed Description of the Invention Object of the Invention The present invention relates to a method for rolling a steel plate with projections on both sides, and a method for appropriately rolling a steel plate with projections on both sides having a plurality of types of configurations using a set of upper and lower caliber rolls. This is an attempt to provide a possible method.

Industrial applications: Rolling technology for steel plates with protrusions on both sides, which are formed for the purpose of improving bonding with concrete, reinforcing, or preventing slipping.

Conventional technology It has been conventionally used to create protrusions on steel plates using caliber rolls, but this method involves forming protrusions with the desired height using a roll with a caliber that corresponds to general protrusions. It is.

In addition, conventional steel plates with projections have projections formed on one side, and a considerable amount of research has been carried out to obtain the projections accurately.

Furthermore, to change the properties of the steel plate due to protrusions, the shape of the caliber,
It is necessary to convert to rolls with different spacing.

Problems to be Solved by the Invention However, when such a conventional method is used, multiple B(7) caliber rolls are required in order to obtain steel plates with different characteristics, and these rolls must be assembled each time. It is necessary to change it.

Therefore, the cost of the rolls increases, the cost of grinding the rolls, etc. increases, and the rolling efficiency decreases significantly.

In addition, such steel plates with protrusions are often reinforced with protrusions or to increase the joint strength of the joint against concrete, etc., but conventional steel plates with protrusions of this type have protrusions on one side. However, since these effects cannot be fully obtained, the characteristics are concentrated on one side, resulting in a product that is unbalanced in cross section. For example, when trying to obtain a composite structure with concrete, one side may have a favorable bonding relationship that combines the excellent tensile strength of steel and the excellent compressive strength of concrete, but the other side On the other hand, these relationships are hardly required, and the intended purpose is often not achieved effectively.

When this bonding relationship is required only on one side, it is often the case that an additional reinforcing effect is required on the other side, and such an effect cannot be obtained with conventional devices.

"Structure of the Invention" Means for Solving the Problems When rolling a blank plate using a roll having a plurality of calibers arranged in the width direction of the plate, work rolls each having a plurality of calibers arranged above and below the blank plate are used. A method for rolling a steel plate with projections on both sides, characterized in that the steel plate with projections on both sides is rolled by shifting the work rolls in the axial direction in immediate response to the position of the projections on the steel plate with projections on which one or both work rolls are to be obtained.

Work rolls each having a plurality of calibers arranged above and below the working material plate are set, and one or both of these work rolls are shifted in the axial direction in response to the position of the protrusion on the steel plate with protrusions to be obtained. By doing so, protrusions can be formed on both sides of the VA board. Further, by the above-mentioned shift operation, the positions of the projections on the upper and lower sides of the steel plate can be relatively changed and adjusted, thereby appropriately selecting the characteristics of the obtained steel plate.

Note that depending on the position of the protrusions on the upper and lower sides of the steel plate, the height of the protrusions obtained can be varied to a certain extent even under the same rolling conditions.

As mentioned above, by changing the relative position of the protrusions above and below the steel plate and the height of the protrusions, the strength of the steel plate obtained, the composite integration characteristics with concrete, etc. can be freely selected, and the strength of the steel plate can be freely selected according to the purpose of use. product is obtained.

EXAMPLE To explain a specific embodiment of the present invention, when rolling a material plate with a roll having a plurality of calibers arranged in the width direction of the plate, a plurality of calibers 3 as shown in Fig. 2 are arranged. As shown in Fig. 1, the work rolls 1 and 1 are arranged above and below the material plate 2, and the work rolls 1, 1, 1, 1, or both of the work rolls 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, and 1, 1, 1, 1, 1, 1, 1, 1, and 1, 1, 1, and 1, 1, and 1, 1, 1, and 1, and 1, 1, 1, and 1,. It is proposed that the material plate 2 be rolled down by shifting in the axial direction. A specific example of the above-mentioned shift operation is to shift one or both of the rolls so that the calibers 3.3 in each roll 1 and 1 face each other as shown in FIG. The shift operation is performed so that the calibers 3 in the upper and lower rolls 11 adopt alternately shifted phases as shown in FIG. be able to.

What is shown in FIGS. 1 and 2 is a case where the shape, depth, and spacing of the calibers in the upper and lower rolls are the same, but in the case of the present invention, the calibers are arranged in the upper and lower rolls 1 and 1. The relationship may be changed as shown in FIG. 4, for example, the caliber 3 may be arranged on the other roll with a spacing that is 2 to 5 times the caliber spacing on one roll, or more. Of course, the shape (angle of inclination, etc.) and size of each caliber 3 may be changed as appropriate. In this way, by changing the caliber spacing, caliber shape, and size, various properties of the protruding steel plate obtained can be selected, but in addition to this, changes and adjustments can be made by shifting the caliber roll as described above. It is clear that the properties and uses of the steel plate with protrusions obtained by the present invention will be greatly varied.

Using the upper and lower roll calibers as shown in Figure 4 above,
Regarding the cross section of the concretely obtained steel plate 2 with projections, see Section 3.
As shown in Figures (a) and (b), the relative positional relationship between the upper and lower protrusions 4 may be further varied in various ways, as in the case of Figures 1 and 2 described above. It is.

The above-mentioned shift operation can be set in advance at the time of rolling, and can also be finely adjusted as appropriate after the start of rolling.
Further, the time required for the adjustment and setting is generally within one minute, and even when the caliber position is moved considerably and set, it takes about 30 to 50 seconds. In other words, the time required to replace the rolls is reduced to at least a few times, and generally to less than one-tenth.

That is, by forming the protrusions on the upper and lower sides of the material plate as described above, the properties of the obtained steel plate can be determined as a combination of the protrusions. Therefore, even if one or both of the upper and lower projections changes, the characteristics of the product will change, and of course reinforcement by the projections on the front and back of the steel plate,
Performance such as anchoring can be obtained.

A specific manufacturing example of the product according to the present invention will be described below.

Manufacturing Example 1 The upper and lower rolls 1.1 in a rolling stand had the same caliber shape as shown in FIG. 2. That is, the caliber width is 10 dragons, the caliber spacing is 40 fins, and the caliber depth is 5 fl. Such a roll 1.1 is installed in the Kan 4 stand of a hot-roll finishing tandem rolling mill, and the first As shown in figure (al), the upper and lower calibers were shifted to face each other, and a rough bar with a thickness of 351 cm was rolled down to a thickness of 16-1 on stands Nos. 1 to 3. Figure 1+a by rolling with Na4 stand
As shown in 1, the plate thickness is 9 fins, and the width is 1475 mm, and continuous protrusions 4 of 4 mm in height due to the above-mentioned caliber shape are arranged vertically and oppositely.
Steel plate 5 with protrusions of fl was obtained.

After such rolling, the upper roll was shifted in the direction of the 20++n axis, rolled down to a thickness of 15 In on a 3-stand stand, and then rolled to a thickness of 9 Tsuru on a 4-stand, with the same protrusion shape and spacing, but the height. A steel plate 5 with protrusions as shown in FIG. 1(b) having a width of 1475 am, in which 41 protrusions 4 were respectively positioned between the protrusions on the opposing surfaces, was obtained.

The operating conditions for these rolling operations are summarized in Table 1 below.

Chapter 1 Table Note: F4 is a 4-stand.

Manufacturing example 2゜ As shown in Figure 4, a caliber is provided on the upper roll for every 3 calibers on the lower roll, and the caliber depth is 5 n+ for both the upper and lower roll depths. Rolling was carried out with the entrance side plate thickness at 4 stands as I5l. The cross section of the obtained m-plate is as shown in Fig. 3(a), and the height of the protrusion 4 on the upper surface is 3.0 fl, and that on the lower surface opposite to it is 4.0 fl. Others were 4.81■.

Further, after such rolling, rolling was performed by shifting the lower caliber roll by one quarter of the caliber interval. The thickness of the steel plate obtained under the same conditions as the inlet side plate thickness of the N14 stand shown in FIG. The height of the protrusions 4 on both sides of the lower surface facing the fin was 4.1 fi, and the height of the remaining protrusions was 4.6 fi.

The rolling operating conditions for obtaining the steel plates shown in Figure 3 (a) (mountains) are as shown in Table 2 below, and even under the same rolling conditions, the upper and lower protrusions of the obtained steel plates are opposed to each other. It was confirmed that the protrusion height of the product obtained differs depending on whether or not the product is present.

Therefore, by appropriately selecting these relationships, it is possible to quickly adapt to each purpose of use and obtain products with varying characteristics.

Table 2 "Effects of the Invention" According to the present invention as explained above, double-sided protrusions with multiple types of configurations can be produced without reducing rolling efficiency by using one set of upper and lower caliber rolls without rearranging the caliber rolls. It is possible to easily manufacture and provide steel plates with steel plates, reducing roll costs, grinding costs, etc.
This invention has great industrial effects, such as economical manufacturing.

[Brief explanation of drawings]

The drawings show the technical contents of the present invention, and FIG. 1 is an explanatory diagram showing the cross-sectional shape of a steel plate obtained by one embodiment of the present invention, and FIG. 2 is an explanatory diagram of the roll caliber. , FIG. 3 is an explanatory diagram of the cross-sectional shape of a steel plate according to another embodiment of the present invention, and FIG. 4 is an explanatory diagram of its roll caliber. In these drawings, 1 is a work roll, 2 is a blank plate, 3 is a caliber, 4 is a protrusion, and 5 is a steel plate with a protrusion. Patent applicant Nippon Kokan Co., Ltd. Inventor Masu
1) Kazudo Sada, Takeshi Hirasawa /
Trouble -? ■ Chapter 4ii1

Claims (1)

[Claims] When rolling a material plate with a roll having a plurality of calibers arranged in the width direction of the material plate, work rolls each having a plurality of calibers arranged above and below the material plate are set, and one or both of these work rolls are rolled. 1. A method for rolling a steel plate with projections on both sides, characterized in that rolling is carried out by shifting in the axial direction in immediate response to the position of the protrusions on the steel plate with projections to be obtained.