JP3185334B2 - Butt joining method of hot steel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a butt joining method for hot steel materials.

[0002]

2. Description of the Related Art In recent years, in order to realize endless rolling or the like, butt joining of hot steel materials in a hot line during running has been studied.

As one means of the joining, for example, the rear end portion of the preceding hot steel material and the front end portion of the following hot steel material are directly heated and heated over the entire width by using an electric heating device. By pressing the rear end portion of the preceding hot steel material whose temperature has risen and the front end portion of the following hot steel material against each other using a pressing device and pressing them, the leading hot steel material and the following hot steel material can be combined with each other. It is considered to join.

[0004]

However, in such a butt joining method of hot steel materials, an electric heating device is used to connect the rear end of the preceding hot steel material and the front end of the subsequent hot steel material. Since the temperature is raised to a temperature at which press bonding can be performed, a large-capacity heating device is required, and power consumption required for heating is large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has been made in view of the fact that hot steel materials of a hot line can be joined in a short time and easily while running without using an electric heating device. It is an object of the present invention to provide a butt joining method for steel materials.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a butt joining method of a hot steel material for joining hot steel materials of a hot line while traveling, and a method for joining a hot steel material at a rear end portion or a subsequent hot steel material of a preceding hot steel material. At least one end of the front end of the interstitial material is fixed to traveling means that travels in the moving direction of the hot line, and the other end is moved toward the one end while moving in the moving direction. By pressing relatively, the joint surface of the other end is slid with respect to the joint surface of the one end to apply a frictional force to both joint surfaces, so that the rear end and the rear end of the preceding hot steel material It is characterized in that the tip of the hot steel material in the row is joined by friction welding .

[0007]

Therefore, according to the present invention, it is possible to easily and quickly join hot steels in a hot line during traveling without using an electric heating device.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an example of an apparatus for carrying out the method of the present invention, in which 1 is a hot line, 2 is a preceding hot steel material traveling on the hot line 1 in the direction of arrow A. Reference numeral 3 denotes a succeeding hot steel material which feeds behind the hot steel material 2, and is connected by a joining device 5 which can run on a rail 4 laid in the middle of the hot line 1. The steel members 2 and 3 can be joined during running.

The structure of the joining device 5 is as follows.

A pair of upper and lower clamp members 7 and 8 for clamping the rear end 2a of the preceding hot steel material 2 are provided on the downstream side (right side in the drawing) of the traveling carriage 6 that can travel along the rail 4. , The upper clamp member 7 is connected to a clamp cylinder 9 which can expand and contract in the up-down direction, and the lower clamp member 8 is fixed to the traveling carriage 6 to constitute the preceding hot steel material clamping apparatus 10.

Upper and lower windows 11 and 12 are formed on the traveling carriage 6 on the upstream side (left side in the figure) of the preceding hot steel material clamping device 10, and the upper and lower windows 11 and 12 are formed.
12, the upset blocks 13 and 14 are slidably fitted in the line direction.
Upset cylinder 15, which can be extended and retracted in the line direction,
An upset device 17 is constructed by connecting the guide arms 18 and 19 to the upset blocks 13 and 14, respectively, and guide arms 18 and 19 are pivotably mounted on the upset blocks 13 and 14 so as to be tiltable up and down. A biasing device 22 having a pair of upper and lower clamp members 20 and 21 for clamping the distal end portion 3a of the hot steel material 3, and a spring or the like for biasing the lower guide arm 19 upward, and an upper guide arm A subsequent hot steel material clamping device 25 is provided by providing a traveling cylinder 6 with a clamp cylinder 24 that can move up and down via a friction sliding device 23 described later.

The friction sliding device 23 has a clamp block 27 slidably fitted up and down in a window 26 formed at a position above the tip of the guide arm 18 above the traveling carriage 6 so as to be slidable up and down. 27, the clamp cylinder 24 and the clamp block 2
7, a friction sliding connecting rod 29 is connected between an eccentric portion of an eccentric shaft 28 that is rotationally driven by an external driving device (not shown) and a tip end of an upper guide arm 18.

When the rear end portion 2a of the preceding hot steel material 2 running on the hot line 1 and the front end portion 3a of the subsequent hot steel material 3 enter the inside of the joining device 5, the running The following operation | movement is performed during the driving | running | working with the trolley | bogie 6 along the rail 4 in the arrow A direction.

That is, first, the clamp cylinder 7 is extended and the clamp member 7 is lowered, so that the preceding hot steel 2
The rear end portion 2a is clamped by the preceding hot steel material clamping device 10, and the clamp cylinder 24 is extended to lower the clamp member 20 via the clamping block 27 and the frictional sliding connecting rod 29, thereby causing the following. The leading end portion 3 a of the hot steel material 3 is clamped by a subsequent hot steel material clamping device 25.

Next, the upset cylinders 15, 16
Is extended to urge the clamp members 20 and 21 of the subsequent hot steel material clamping device 25 toward the preceding hot steel material clamping device 10 via the upset blocks 13 and 14 and the guide arms 18 and 19. Of the hot steel 3 is pressed against the rear end 2a of the preceding hot steel 2.

When the leading end 3a of the subsequent hot steel material 3 is pressed against the rear end 2a of the preceding hot steel material 2, the eccentric shaft 28 is driven to rotate by an external driving device (not shown). Causes the friction sliding connecting rod 29 fitted to the eccentric part of the above to move up and down, thereby moving the clamp member 20 above the subsequent hot steel material clamping device 25 up and down.

At this time, since the clamp member 21 below the subsequent hot steel material clamping device 25 is urged upward by the urging device 22, the subsequent hot steel material clamps between the clamp member 20 and the upper clamp member 20. 3 moves up and down following the upper clamp member 20 with the distal end portion 3a clamped.

Then, the joint surface of the rear end portion 3a of the subsequent hot steel material 3 is slid up and down with respect to the joint surface of the rear end portion 2a of the preceding hot steel material 2, and frictional force is applied to both joint surfaces. And they are joined by friction welding.

Here, since both hot steel materials 2 and 3 are already in a high temperature state, they can be joined very easily in a very short time.

For example, in the case of ordinary steels having a temperature of 800 ° C. or more, joining can be performed in about 3 seconds using a pressing force of about 24 Mpa. In this case, bonding can be performed in about 20 seconds using a pressure contact force of about 45 Mpa.

The butt-joining method of the hot steel material of the present invention is not limited to the above-described embodiment, but is applied to the following hot steel material by fixing the front end portion of the hot steel material. The rear end side may be slid, the direction of friction sliding may be the width direction of the hot steel material in addition to the vertical direction,
In addition, it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0023]

According to the butt-joining method of the present invention, various excellent effects can be obtained as follows.

(I) Hot steels in a hot line can be easily joined in a short time while running without using an electric heating device.

(II) Due to the above (I), the section required for joining in the hot line can be shortened, so that the hot line does not need to be greatly extended.

[Brief description of the drawings]

FIG. 1 is an overall line configuration diagram according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the joining device of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot line 2 Hot steel 2a Rear end 3 Hot steel 3a Front

Continued on the front page (72) Inventor Tatsuo Michiaki 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Pref. Ishikawajima-Harima Heavy Industries Co., Ltd. (72) Inventor Shun Chiba 1 Shinnakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawajima-Harima Heavy Industries Co., Ltd. (72) Inventor Tsune Honjo 1st Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Ishikawajima-Harima Heavy Industries Co., Ltd.Yokohama 2nd factory (56) References JP-A-62-57781 ( JP, A) JP-A-62-142082 (JP, A) JP-A-61-144285 (JP, A) JP-A-5-76910 (JP, A) Takashi Nakamura 3 people, "Welding Technology Course 2 Brazing ”, First Edition, Nikkan Kogyo Shimbun, February 29, 1964, p. 318-319 (58) Field surveyed (Int.Cl. ⁷ , DB name) B23K 20/12 B21B 1/26 B21B 15/00

Claims (1)

(57) [Claims] In a butt joining method of hot steel materials for joining hot steel materials of a hot line during running, a method of joining a rear end portion of a preceding hot steel material or a front end portion of a subsequent hot steel material. At least one end is fixed to a traveling means that travels in the moving direction of the hot line, and the other end is relatively pressed against the one end while moving in the moving direction, The front end of the preceding hot steel material and the front end of the subsequent hot steel material by sliding the joining surface of the other end with respect to the joining surface of the end to apply frictional force to both joining surfaces. And
A butt-joining method for hot steel materials, wherein the joining is performed by friction welding .