JPH04182003A - Linear type section, its production and continuous wall which consists of those linear type shapes - Google Patents

Abstract

PURPOSE:To enable forming a wide range of flat surface by forming inclined linear parts which are inclined outwards, parallel parts which are parallel to the web and tip parts which are erected from there at both ends of the web. CONSTITUTION:Male pawl joints A are formed at both ends of the web W of section 1. The male pawl joints A are constituted of the inclined linear parts 3 which are bent so as to be inclined slightly outwards from the ends of the web W, parallel parts 4 which are extended in parallel to the web W from the linear parts and tip parts 5 which are erected from the parallel parts 4. An upper pawl and lower pawl are provided at both ends of the web. In this way, a steady, high-quality product excellent in workability is obtained.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is constructed by alternately connecting straight steel sections having symmetrical male joints and straight steel sections having symmetrical female joints. This invention relates to continuous walls with smooth walls, each straight steel section that constitutes these walls, and a method for manufacturing the same.

(Prior Art) Conventionally, joints for straight steel sheet piles (shaped steel) have various shapes, but in most cases they have a shape that protrudes (spreads or protrudes) from both the top and bottom (front and back) of the web. Therefore, it was unsuitable for use in structures requiring a continuous smooth surface. There are some joint-shaped steel sheet piles that form a continuous smooth wall surface, but most of the steel sheet piles have a limited degree of freedom in fitting between female and male joints, and are rigidly engaged. If the steel sheet pile is bent or warped, or if the cross-sectional shape and dimensions are not highly accurate, it will be difficult to insert it smoothly, and if the steel sheet pile is not driven accurately, it may cause damage to the nails. The manufacturing method is Caliber (
A grooved) rolling method is adopted, but since this rolling method is mainly based on the grinding effect of the grooved side walls of the upper and lower rolls, the amount of roll modification due to grooved wear is large, and the roll consumption rate is high. Become. In addition, large amounts of rolling oil and cooling water are required, and if these are insufficient, rolling operations become difficult and the shape of the product becomes unstable.

As a solution to this problem, a universal rolling method is adopted, for example, as disclosed in Japanese Patent Publications No. 47-4778 and Japanese Patent Publication No. 38241-1982. However, these also require relatively deep and complicated hole shapes for the upper and lower horizontal rolls, and the above-mentioned problems have not been solved.

Furthermore, Japanese Patent Publication No. 55-1921 or Japanese Unexamined Patent Publication No. 1983
Publication No. 1913 discloses a technology using so-called universal rolling equipment for H-shaped steel, but it is a method for manufacturing straight steel sheet piles with special joint shapes, that is, horizontally asymmetrical or vertically asymmetrical. It is difficult to apply these to straight steel sections having joints of other shapes.

(Problems to be Solved by the Invention) The present invention provides a linear steel section (steel sheet pile) that constructs a continuous wall by engaging female-male joints, and which has excellent joint fitability and an engagement construction. The objective is to provide a straight section steel with symmetrical female and male joints, each with a continuous wall surface that forms a smooth surface. It is an object of the present invention to provide a manufacturing method for each of the above-mentioned linear steel sections that is advantageous for the following purposes.

(Means for Solving the Problems) The present invention has the following configuration in order to achieve the above object. That is, (1) Consisting of an inclined straight part at both ends of the web that is bent slightly outward from the web end, a parallel part that extends parallel to the web from the inclined part, and a tip part that stands upright from the parallel part. (2) A straight section steel characterized by having a male claw joint, (2) processing a slab material in a rough rolling process equipped with a breakdown mill, and having flanges bent in one direction at both ends of the web. After making a U-shaped rough shaped material, the rough shaped material is intermediate rolled with a universal mill and an edger mill, and the web is rolled to a predetermined thickness with upper and lower horizontal rolls of the universal mill, and the lower horizontal roll is rolled. The rolls constrain the corners of the web and flange, and the flanges are rolled to a predetermined thickness between the holes formed on the vertical rolls and the lower horizontal rolls, and the web is constrained by the upper and lower horizontal rolls of the edger mill. At the same time, while giving a predetermined inclination from the web using the hole shape of the lower horizontal mill, the flange is edged to a predetermined length to form an intermediate rolled material, and the intermediate rolled material is passed through upper and lower horizontal rolls.
It is formed in a finishing mill that has a two-stage groove, and the flanges with a predetermined inclination of the intermediate rolled material are preprocessed by bending the parallel part and the part that will become the upright tip in the preforming hole. A method for manufacturing a straight section steel, characterized by forming a male joint of a claw consisting of an inclined part, a parallel part, and an upright tip part in a hole shape, a first claw having a tip extending curvedly from the inclined straight part bent by bending and parallel to the web; a straight part extending from the bent part of the second claw onto the same surface of the web; A female joint for fitting the male joint of item 1 above, which has one claw with a bent tip parallel to the inclined straight part of the first claw, and has openings at the tips of the first claw and the second claw. (4) The slab material is made into a vertically asymmetrical dogbone-shaped rough-shaped material through a rough rolling process using a breaktown mill, and then the rough-shaped steel is made into a universal shape. Intermediate rolling is performed using a mill and edger mill, and a universal mill is used to form a web with a predetermined inner width and a predetermined thickness, as well as an asymmetrical width that has a predetermined thickness and is longer and shorter vertically around the web. The flange with the vertically asymmetrical width is width-rolled while the web ends are restrained with the upper and lower horizontal rolls of an edger mill to form an optimal flange width on the upper and lower sides, resulting in an intermediate-rolled material. When processing a material in a finishing mill that has a three-stage groove with upper and lower horizontal rolls, first the short-width side flange of the pre-forming groove is inclined outward from the root of the web, and its tip is aligned with the web. Preliminary processing is performed to bend almost parallel to the web, and then the inclined part of the short width flange is bent using an upper claw forming hole mold to form a straight part extending on the same straight line as the web, and the tip part is bent from the straight part. The upper claw is bent toward the tip of the lower claw, and the long width side flange is processed using the lower claw molding hole mold to curve from the straight part that slopes outward from the web and almost parallel to the tip of the upper claw. A method for manufacturing a straight steel section, characterized by forming a female joint consisting of a lower claw having a tip portion substantially parallel to the , and (5) fitting the male joint of item 1 above into the female joint of item 2 above. , a continuous wall of a linear steel section characterized by connecting a linear section steel having a male joint and a straight steel section having a female joint so that one surface of these constitutes a substantially continuous flat surface.

(Actions and Examples) The present invention will be explained in detail below.

FIG. 1 shows a straight steel section 1 having a male and female joint A of the present invention, and FIG. 2 similarly shows a straight steel section 2 having a female joint B.

Straight section steel 1 (hereinafter referred to as section steel 1) has an inclined straight line [3] bent diagonally outward at both ends of the web W, a parallel section 4 extending parallel to the web 1 from the inclined straight section 3, and a parallel section 4 extending parallel to the web 1 from the inclined straight section 3; The inclined straight portion 3, the parallel portion 4, and the upright tip portion 5 form a male joint (claw) A having an approximately L-shaped cross section. It constitutes an engagement groove 6 into which the upper claw fits. Furthermore, the effective width of the web W!
W has a constant length.

The straight section steel 2 (hereinafter referred to as section steel 2) has a female joint B consisting of an upper claw 7 and a lower claw 8 at both ends of the web W', and the center line of the upper claw 7 is approximately on the same line as the web W. A certain straight section 7a and
The tip portion 7b is bent slightly diagonally outward from the straight portion 7a.
In addition, the lower claw 8 has an inclined straight part 8a that bends diagonally outward so that the upper claw straight part 7a is approximately parallel to the tip 7b, and an upper claw straight part 8a that curves from this. 7a
It consists of a tip 8b that is almost parallel to the upper claw tip 7a.
An opening 1i11+9 is formed between the upper and lower claw tips 8b, and a fitting part 10 for the male claw A is formed, which is surrounded by the upper and lower claws. In principle, the width JW' of the web W' is the same as the width jw of the web W of the section steel 1.

The above-mentioned section steel 1.2 is rolled and formed by the following method.

FIG. 3 shows an example of the rolling forming method for the section steel 1, showing the main part of one side, and FIG. 4 shows an example of the forming process.

In the rough rolling process of the present invention, 1, upper and lower horizontal rolls 10
A slab material is manufactured into a rough shaped material 11 having a roughly U-shaped cross section using a breakdown mill BD having a hole type ka1.4 constituted by a and 10b. This mill BD can be processed into a roughly shaped material using existing cut-invert rolls and in a process similar to the existing process, so detailed description thereof will be omitted. Note that caputo invert is a process in which webs of scalene steel sections with irregular thickness are universally rolled using channel steels that are butted together, and then divided after finish rolling.

In the subsequent intermediate rolling process, a universal mill U and an edger mill E are arranged, and the rough shaped material 11 is rolled into an intermediate rolled material 1.
Process into 2. This universal mill U has upper and lower horizontal rolls 20a, 20b and vertical rolls 21a, 21b (21
b is not shown), and rolling is performed while adjusting the opening degrees of the upper and lower horizontal rolls 20a and 20b to form a web W having a predetermined effective width and thickness. Vertical rolls 21a, 21b with forming holes
A flange f is formed by vertically bending and stretching the web 12 using the lower horizontal roll 20b. This universal mill U can also share or divert known cut-invert rolls.

The intermediate rolled material rolled by the universal mill U has a hole shape ka1 formed by upper and lower horizontal rolls 30a and 30b of an edger mill E arranged in pairs with the universal mill U.
．． 3H, while restraining the web with both rolls, the hole shape of the lower horizontal roll inclines the flange f slightly outward from the web vertical line, and the end is shaped and adjusted to a predetermined length to form a cross section. A U-shaped intermediate shaped rolled material 12' is formed.

Next, the intermediate rolled material 12' is finished into a final product by a finishing mill F. The finishing mill F has a preforming hole type ka1.2 and a finishing hole type ka1.1 on the upper and lower horizontal rolls 40a and 40b, and the hole type ka1.2 is formed from the vertical line of the web W formed by the edger mill E. The flange f, which is slightly inclined outward, is bent into two stages from the middle part, and preformed into the inclined straight part 3', the middle IE 4', and the tip part 5', and this preformed flange is formed into the hole shape ka1.1. Processed to form an inclined straight portion 3 which is inclined slightly outward from the vertical line of the web W.
A final male joint A is formed, consisting of a parallel portion 4 substantially parallel to the web and a tip portion 5 standing upright from the parallel portion 4. During this finish rolling, the web is restrained by upper and lower horizontal rolls 40a and 40b while joint processing is performed to finish the product into a product having a predetermined effective width and thickness. In addition, the hole type ka of the finishing mill
1.1.2 may be formed into separate rolls.

As described above, the steel section 1 of the present invention has a specially shaped joint,
Existing cut-invert breakdown rolls (BD) and universal rolls (U') can be used in the manufacturing process, allowing for extremely low-cost manufacturing.

The above-mentioned shape steel 2 of the present invention is manufactured by the rolling method shown in the embodiment (one side main part) shown in FIG.

That is, in the rough rolling of this process, the slab material is etched multiple times by the upper and lower horizontal rolls 100a and 100b of the breakdown mill BD, resulting in a so-called vertically asymmetrical dogbone shape in which the width of the flange differs around the web. The rough shaped material 111 is processed. This rough rolling process is similar to the rough shaping process of conventionally known H-beam steel sections having flanges. Therefore, detailed explanation thereof will be omitted.

Next, in the intermediate rolling process, a universal mill U and an edger mill E are arranged, and the rough shaped material is formed into a predetermined web W by the hole type KAL, 3 formed by the universal mill U.
The intermediate rolled material 112 is rolled and shaped to have a substantially H-shaped cross section with a constant web width and a constant thickness and flange inner surface. Here, the horizontal roll 200a that constitutes the universal mill U
, 200b has a flat surface that presses the web surface of the intermediate rolled material 112, and preferably restrains the flange inner surface using a roll formed such that the side surface contacting the flange inner surface is slightly inclined outward. Along with horizontal roll 2
Adjust the opening degrees of 00a and 200b to obtain the desired web thickness.

That is, these horizontal rolls 200a, 200b are
It has the same profile as the horizontal roll in the universal mill for section steel pressing ffi, so it can be shared or diverted. On the other hand, the vertical rolls 21Qa and 210b (21 (lb not shown) are rolls in which the roll surface that presses the flange surface of the intermediate rolled material 112 forms the same profile as the adjacent side surfaces of the upper and lower horizontal rolls, Similarly, the vertical rolls 210a, 210b used in conventional intermediate universal mills for rolling H-section steel can be used. That is, the horizontal rolls 200a, 200
By using these vertical rolls 210a and 210b together with b, the wall thickness of the joint part of the straight section steel can be formed to a predetermined thickness, and the product shape is reasonable in terms of joint performance and economical with less wasted parts. In addition, it is possible to reduce the web deviation of the intermediate rolled material 112 and the difference in wall thickness between the upper and lower flanges.

Next, the intermediate rolled material 112 rolled by the universal mill U is actively rolled down on the web surface by the hole type MAL, 3E of the edger mill E arranged in pair with the universal mill U. However, intermediate rolling has a flange width shaped into a short width (fl) and a long width (f2) vertically around the web by restraining both ends of the web surface and rolling down (edging) the end of the flange f'. It is formed in the material 112a. This nib jar mill E has 30 vertical and horizontal rolls.
0a and 300b, and the etching height of the hole fika1.3H (that is, the length of the width of the upper and lower flanges f1 and f2) is formed vertically asymmetrically so that it is suitable for each product (joint) claw.

The intermediate rolled material 112a is finished into a final product by a finishing mill F having a finishing hole die ka1.1, an upper nail shaping hole die ka1.2, and a preforming hole die ka1.3.

The finishing rolling mill F has upper and lower horizontal rolls 4 that form the above-mentioned hole shape.
00a and 400b, and the female joint B is processed and formed using each hole mold while restraining the web.

That is, in the hole shape ka1.3, the long width flange f2 is supported as is without any special processing in the hole shape of the lower roll 400b, and the short width flange (fl) is slightly inclined (7a) to the outside of the web. The tip portion 7b is bent approximately parallel to the web to preform the upper claw 7. This preformed material is processed with a hole shape ka1.2, and the inclined part 7a is bent so as to extend almost on the same straight line as the web,
The upper claw 7 is formed by bending the tip portion 7b toward the lower claw tip. In the hole pattern ka1.1, the upper claw 7 is supported by the hole pattern of the upper roll 400a, and the flange f2 is attached to the web by an inclined straight portion 8a that slopes from the root to the tip of the upper claw approximately parallel to 7b.
At the same time, the middle part is curved and the tip part 8b is finished and molded to be approximately parallel to the straight part 7a of the upper claw, thereby manufacturing the female second hand B.

Incidentally, the above ka1.1.2 and ka1.3 may be provided on separate rolls, respectively.

The steel section 2 of the present invention is rolled and formed by the method described above, and since existing BD mills and universal mills can be used, it is not necessary to provide a dedicated mill for that part, which provides an extremely large equipment advantage.

FIGS. 6(a) and 6(b) show an example of the use of the linear steel section of the present invention. FIG. 6(a) shows the same type of section steel, that is, two section steels 1. 1 is connected to two connecting support plates 13. so that the parallel parts 4 of the respective claws face inwardly.
13 to form a box shape, and two shaped steel sections 2 having a universal joint are fixed with two connecting support plates 13 and 13 so that the lower claws 8 face inward to form a box shape, these are shown in the figure. As shown, the male claw is inserted into the fitting portion 10 of the female joint, and the female upper claw is positioned in the male engagement groove 6 to connect the male and female joints to construct a continuous wall.

FIG. 6(b) shows a box-shaped steel section 1 having a male joint and a section steel 2 having a female joint connected oppositely by connecting support plates 13 and 13, and similar to FIG. 6(a), these male - A continuous wall is constructed by connecting female joints. In either case, the front and back surfaces of the continuous wall are flat surfaces with no visible claws or other protrusions.

(Effects of the Invention) As explained above, since the straight steel section of the present invention has symmetrically shaped male and female joints, it is extremely easy to connect both joints. On one side of the continuous wall constructed by connecting the joints, the continuous portion of the male-female joint is also substantially flat, and an extremely wide flat surface can be formed as a whole.

Therefore, it becomes a wall with excellent aesthetics, and the struts and beams at the time of construction.
This makes it easier to construct the bulge and weld the vertical joints.

In addition, each of the steel sections of the present invention can use or utilize existing breakdown mills and universal mills, so it is possible to reduce manufacturing costs.
Through skilled work, production efficiency can be significantly improved, and high-quality products with stable workability can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a straight steel section having a male joint of the present invention, FIG. 2 is a sectional view showing an example of a straight steel section having a female joint of the present invention, and FIG. Figure 4 shows an example of the manufacturing process of the present invention in which the straight steel sections shown in Figure 2 are connected to form a continuous wall. be. A: Male joint B: Straight section steel 2 having a male joint on the female joint, Straight section steel 3 having a female joint 3: Inclined straight section 4: Parallel section 5: Tip section 6: Engagement groove 7, upper claw 7a : Straight part 7b, tip part 8:
Lower claw 8a: Inclined straight part 8b: Tip part 9: Opening part 10: Fitting part 11, rough shaped material 12: Intermediate rolled material 13 two-connected support material BD nib breakdown mill U: Universal mill E: Edger mill F , finishing rolling mill kal: hole type

Claims (5)

[Claims] (1) At both ends of the web, a male member is constructed of an inclined straight part that is bent at a slight inclination outward from the web end, a parallel part that extends parallel to the web from the inclined part, and a tip part that stands upright from the parallel part. A straight shaped steel section characterized by having a shaped claw joint. (2) After processing the slab material in a rough rolling process using a breakdown mill to create a U-shaped rough shaped material with flanges bent in one direction at both ends of the web, the rough shaped material is Intermediate rolling is performed using a universal mill and an edger mill, and the upper and lower horizontal rolls of the universal mill roll the web to a predetermined thickness.The lower horizontal roll restrains the corners of the web and the flange, and the web is formed into a vertical roll. The flange is rolled to a predetermined thickness between the hole pattern of the edger mill and the lower horizontal roll, and while the web is restrained by the upper and lower horizontal rolls of the edger mill and the flange is rolled with a predetermined inclination from the web by the hole pattern of the lower horizontal mill. is edged to a predetermined length to form an intermediate rolled material, and the intermediate rolled material is rolled using upper and lower horizontal rolls.
It is formed in a finishing mill that has a two-stage groove, and the flanges with a predetermined inclination of the intermediate rolled material are preprocessed by bending the parallel part and the part that will become the upright tip in the preforming hole. A method for producing a straight steel section, characterized in that a male joint of a claw consisting of an inclined part, a parallel part, and an upright tip part is formed in a hole shape. (3) At both ends of the web, a lower claw has a tip portion that curves and extends parallel to the web from an inclined straight part that is bent slightly outward from the web, and a bent part of the lower claw inclined straight part. An upper claw is provided which has a straight line portion extending on the same surface of the web and a bent tip portion which is parallel to the inclined straight line portion of the lower claw from the straight line portion, and has openings at the tips of the lower claw and the upper claw. A linear steel section comprising a female joint into which the male joint according to claim 1 is fitted. (4) After the slab material is made into a vertically asymmetrical dogbone-shaped rough shaped material in a rough rolling process using a breaktown mill, the rough shaped material is intermediate rolled in a universal mill and an edger mill, and then the rough shaped material is rolled in a universal mill. The web is made into a web with a predetermined inner width and a predetermined thickness, and is processed into a flange having a predetermined thickness and an asymmetric width that is longer and shorter vertically with the web at the center. While restraining the web ends, the flanges with asymmetrical width in the upper and lower directions are width-rolled to form an intermediate-rolled material with an optimal upper and lower flange width, and then this intermediate-rolled material is finished with upper and lower horizontal rolls to form a three-stage groove. When processing with a rolling mill, first the short side flange is tilted outward from the base of the web using a preforming hole mold, and its tip is bent almost parallel to the web. , the inclined part of the short width flanges is bent into a straight part extending on the same straight line as the web, and an upper claw is formed in which the tip thereof is bent from the straight part toward the tip of the lower claw, and the lower claw is bent. A female joint consisting of a lower pawl that is curved from a straight line that slopes outward from the web and approximately parallel to the tip of the upper pawl, and has a tip that is approximately parallel to the web, by machining the long width side flange with a pawl molding hole mold. A method for manufacturing a straight section steel, characterized by forming a straight section steel. (5) The male joint according to claim 1 is fitted into the female joint according to claim 2, and the straight section steel having the male joint and the straight section steel having the female joint are connected so that one surface thereof is substantially continuous and flat. A continuous wall of straight section steel characterized by forming a surface.