JPH02284714A - Rolling mill of shape steel - Google Patents

Abstract

PURPOSE:To improve the dimensional accuracy by composing a guide inducing the passage of a material to be rolled having a web and flanges of a guide roller coming in contact with the end of the flange width and a block with a side guide positioned vertically between both sides of the web and possible to move right and left with the guide roller and providing an elevating means to the block. CONSTITUTION:An inducing guide 2 for the material to be rolled is composed of a guide roller 2a rolling in contact with the end face A of the flange width and a pair of blocks 2b having side guides C upward and downward between both sides of the web B. Vertical elevating means 5 of the block body are arranged to the respective blocks and when the upper and the lower elevating means are connected through a shaft for driving the elevating means with a clutch, therefore, the deviation, etc., of the web generated in the course of rolling the shape steel is reduced and the accuracy of the dimension of the product can be improved.

Description

[Detailed Description of the Invention] (Industrial Application Field) In recent years, in the field of manufacturing steel sections such as H-shape, groove-shape, and I-shape products, the requirements for dimensional accuracy, especially the deviation of the web, have become increasingly strict. There is.

This invention aims to further improve the dimensional accuracy of products by adding innovation to guides disposed on the exit and/or entry sides of a universal rolling mill used for rolling section steel.

(Prior art) There are many proposals for improving the dimensional accuracy of shaped steel products, such as Japanese Patent Application Laid-Open No. 63-303604, but especially for H-shaped steel, it is difficult to improve the dimensional accuracy of rolled steel products during universal rolling. The occurrence of so-called web deviation, in which the web shifts to one side or the other with respect to the center of the flange, is unavoidable, and there is currently no effective protection to reduce or prevent this. .

(Problems to be Solved by the Invention) It is an object of the present invention to provide a rolling device that can reduce as much as possible the deviation of the web that occurs during the rolling process of shaped steel, and obtain a product that satisfies the required dimensional accuracy. The purpose of

(Means for Solving the Problem) The inventors conducted a detailed investigation into the situation in which web deviation occurs during the rolling process of shaped steel products. The main cause is that the upper and lower guides that guide the material are not installed at the same position from the rolling pass line, and as a countermeasure, it is possible to move each upper and lower guide individually to finely adjust the placement position. It turned out to be extremely effective.

This invention is based on the above knowledge.

That is, the present invention provides a rolling mill equipped with a universal rolling mill for rolling a material to be rolled having a web and a flange, and a guide disposed on the exit side and/or the entry side of the universal rolling mill to guide the passage of the material to be rolled. In the device,
The above guide is equipped with a tapered guide roller that rolls in contact with the end face of each flange width of the material to be rolled, and side guides that are located above and below across the web of the material to be rolled and are movable left and right together with the guide rollers. Consisting of a pair of blocks,
A shaped steel characterized in that each of the blocks is provided with an elevating means for controlling vertical movement of the block body, and the upper elevating means and the lower elevating means are connected via a shaft for driving the elevating means having a clutch. It is a rolling equipment.

Here, in order to prevent deterioration of dimensional accuracy due to rattling in the device, it is preferable to connect the lifting means installed on the left and right blocks via a shaft for driving the lifting means with a flange.

Now, FIGS. 1(a) and 1(b) schematically show a rolling apparatus suitable for use in the present invention, and 1 in the figure is equipped with an edge rolling mill E on the exit side, and is used to roll a material having webs and flanges. In the universal rolling mill used for rolling, reference numeral 2 is a guide for guiding the material to be rolled, as shown in the example, which is installed on the entry side of the universal rolling mill 10, and this guide 2 is in contact with each flange width end surface A of the material to be rolled. Rolling tapered guide roller 2a
and a pair of blocks 2b having side guides C positioned above and below, sandwiching the web B of the material to be rolled.

Each of the upper and lower blocks 2b is provided with a hydraulic or motor-driven cylinder 3, and the operation of the cylinder 3 causes the block 2b to move left and right along the groove of the guide rail 4.

Further, each upper and lower pair of blocks 2b is provided with a lifting means 5 consisting of, for example, a screw shaft and a worm wheel compressed therein, and the upper pair of blocks 2b is connected to a universal series from a main drive source. The slider S and the upper guide rail 4 move along the groove of the lifting guide rail 7 by the rotation of a rotary shaft (shaft for driving the lifting means) 6, which is connected to the left and right lifting means 5 and has a worm, respectively. move up and down.

On the other hand, the lower pair of blocks 2b is connected to the rotating shaft 1 via gearboxes 8 and 9, which are a combination of bevel gears.
0, a rotating shaft 12 connecting between the rotating shirt 11 connected by a universal joint and the lifting means 5.
Power from the same main driving source is transmitted by the slider S and the lower guide rail 4 moves up and down along the groove of the elevating guide rail 7.

As shown in FIG. 2, numeral 13 is a keeper plate that restrains only the line direction, 14 is a clutch disposed on the rotating shaft 10, and 15 is a hydraulic cylinder that suspends and holds the guide rail 4. After the guide 2 is positioned, the slider 13 is pressed inward by, for example, a hydraulic cylinder to narrow the gap between the slider S and the lifting guide rail 7, thereby fixing and holding each guide block 2b.

Therefore, regardless of the movement of the slider S, keeper play number 3 does not operate. However, it may be configured to hold the slider S by pushing it inward.

Here, the clutch 14 can transmit power only to the upper pair of guide blocks 2b by blocking the power from the main drive source to the lower pair of guide blocks 2b.

The hydraulic cylinder 15 is designed to move up and down in conjunction with the movement of a slider S that is constantly pulled to kill the squid.

Further, 16 and 17 are sensors (for rotation detection),
The amount of elevation of the left and right guide blocks 2b is detected.

(Function) In order to position the guide 2 at a predetermined position based on the roll pass line of the universal rolling mill 1, first, the pair of blocks 2b at the lower part are connected to the sensors 16 and 17 such as a laser distance meter. to raise, lower, or lower the device to a predetermined position.

Next, the transmission of power from the main drive source is interrupted by the clutch 14, and the pair of blocks 2b at the top are similarly raised, lowered, and stopped at a predetermined position.

Then, the hydraulic cylinders of each keeper plate 13 are actuated to press each slider S inward and fix the block 2b connected thereto.

Note that the guide position adjustment may be an electric type as described above, or may be a manual type.

As mentioned above, each pair of upper and lower blocks 2b is a rotating shirt)
Since the positions of the guides can be adjusted individually using the clutches 14 provided in the guides 10, by arranging the guides at appropriate positions in advance, it is possible to effectively reduce the deviation of the web that inevitably occurs during rolling of section steel. .

In this invention, when a clutch is provided on the rotating shafts 6 and 12 shown in FIG. After completing the position adjustment of block 2b, disengage the clutch of the rotating shaft connected to it, then adjust the position of the block 2b on the side closer to the main drive source, and then disengage the clutch 14 of the rotating shaft 10 that connects the pair of upper and lower blocks 2b. The advantage is that by cutting the guide rail and adjusting the position of the upper guide block as described above, you can effectively absorb the unavoidable rattling of the equipment, especially the lateral imbalance caused by the gap in the guide rail. There is.

In addition, in this invention, the guide 2 is disposed on the entry side of the universal rolling mill, for example, a hydraulic AGC or an electric AGC.
By applying this method and actively rolling down the flange width end of the rolled material with the guide roller 2a of the guide 2, the tip of the rolled material resulting from tension/compression or skid marks etc. of the rolled material during universal rolling can be removed. ~ Even if there is a variation in flange width between the rear ends, it can eliminate the negative effects caused by it, and the punching of the edge rolling mill installed on the exit side of the universal rolling mill is a pinch that prevents the jamming that sometimes occurs. By reducing the rolling reduction caused by the rolls,
This has the advantage that steps in the web, reduction in web thickness, etc. can be advantageously avoided.

(Effects of the Invention) Thus, according to the present invention, the dimensional accuracy of the product can be further improved by preventing the deviation of the flange that inevitably occurs during rolling of the section steel using a simple mechanism. Further, according to the present invention, only one main drive source is required for raising and lowering the guide, so there is no need for an increase in equipment costs or for major equipment modifications.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are explanatory diagrams of the configuration of a rolling apparatus according to the present invention, and FIG. 2 is a sectional view of a main part of a keeper plate. 1... Universal rolling mill 2... Guide 2a... Guide roller 2b... Block 3... Hydraulic cylinder 4
...Guide rail 5...Elevating means 6...Rotating shaft 7...Elevating guide rail 8.9...
・Gearbox 10, 11.12... Rotating shaft 13... Keeper plate 14... Clutch 15
...Hydraulic cylinder 16.17...Sensor S
...Slider Figure 1 (a) f Uniha Punishment Ball Pressure Flag A

Claims (1)

[Claims] 1. A universal rolling mill for rolling a material to be rolled having a web and a flange, and a guide disposed at the exit and/or inlet side of the universal rolling mill to guide the passage of the material to be rolled. In the rolling equipment, the guides are located above and below the web of the material to be rolled and a tapered guide roller that rolls in contact with the end face of each flange width of the material to be rolled. Consisting of a pair of movable blocks with side guides, each block is provided with a lifting means that controls the vertical movement of the block body, and the upper lifting means and the lower lifting means are used to drive the lifting means with a clutch. A rolling device for section steel, characterized in that it is connected via a shaft. 2. The rolling apparatus according to claim 1, wherein the lifting means installed on the left and right blocks are connected to each other via a shaft for driving the lifting means with a clutch.