JP2001079631A - Method and device for tandem reducing thickness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thickness reducing method and device by which the amount of the vertical motion of a material to be formed is reduced by providing die pairs tandem in the conveying direction of the material to be formed, decreasing movable mass by fixing a die on one side of each die pair and taking the other die as a movable die and taking the type of both fixed dies which are provided tandem as a flat die. SOLUTION: In this device, the die pairs of a pair of upper and lower dies are arranged tandem on both sides of the material 1 to be formed and the die pairs on the uperstream side and downstream side are respectively composed of the movable die and fixed flat die. And, the device is provided with a rocking mechanism 7 for alternately reducing the material 1 to be formed with the die pair 2 on the upstream side and die pair 3 on the downstream side by vertically moving the movable die 2a of the die pair 2 on the upstream side which is arranged on one side of the upside and downside and the movable die 3a of the die pair 3 on the downstream side which is arranged on the opposite side of the movable die 2a on the upstream side and conveying devices 10a, 10b for conveying the material 1 to be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tandem type thickness reduction method and apparatus for reducing a material to be formed by an upstream mold and a downstream mold.

[0002]

2. Description of the Related Art Conventionally, when rolls are rolled in hot rolling of a molded product such as a slab or a rough bar, the rolling reduction is less than a limit of a biting ratio of a rolling roll (a ratio between a rolling roll diameter and an original thickness). (The ratio of the reduced thickness to the original thickness) was restricted, and two systems of a tandem mill system and a reversible rolling system were generally used. However, in recent years, there has been an increasing need for an increase in the rolling reduction, suppression of heat dissipation during rolling, and furthermore, a reduction in equipment size, and a pressing method with less restrictions on the rolling reduction has been proposed.

For example, Japanese Unexamined Patent Publication (Kokai) No. 2-175011 proposes a thickness reduction press during running using a single press. FIG. 7 is a diagram showing a basic configuration of this press, in which a tapered mold 100 is provided above and below the molding material 1,
Each mold 100 moves up and down synchronously by an eccentric shaft 102 via a rod 101, and holds a spherical member at an intermediate point of the rod 101 so as to be slidable in the up and down direction so that it can swing in the flow direction. To reduce the thickness. Further, in order to reduce the rolling load, Japanese Patent Application Laid-Open No. 11-114602 proposes a tandem-type press.

[0004] German Patent Publication DE 25 31 591
A1 describes a tandem-type press that performs two-stage pressing. FIG. 8 is a view showing the basic structure of this press, in which a movable mold 100a and a fixed mold 100b
Are provided. Each of the dies 100a and 100b is a tapered die, and the upper die 100a of the upstream die pair is connected to the eccentric shaft 102 via the rod 101 so as to be swingable, and the lower die 100b is fixed. . The upper mold 100b of the downstream mold pair is fixed, and the lower mold 100a is the rod 1
It is connected to the eccentric shaft 102 via 01 to be able to swing. The upstream mold 100a and the downstream mold 100a are 18
It moves up and down with a phase difference of 0 degrees, and the material to be molded 1 is pressed down alternately.

[0005]

Problems to be Solved by the Invention
No. 1 and Japanese Patent Application Laid-Open No. H11-114602 both press the upper and lower dies to move up and down, so that the inertial mass of the movable part becomes large, and the dies are made smaller than the horsepower required for actual reduction. Acceleration / deceleration horsepower for synchronizing tends to increase, and attention was paid to reducing incidental acceleration / deceleration horsepower. On the other hand, in the press of the tandem and intermittent conveyance system disclosed in German Patent No. 2531591A1, a pair of upper and lower dies are formed of tapered dies, and fixed dies are arranged in opposite directions on the entrance side and the exit side. Therefore, when transporting the molding material after the completion of the rolling, when traveling while climbing up the tapered portion of one of the upper and downstream fixed molds, the upper and lower metal molds do not interfere with the molding material. There is a problem that it is necessary to increase the gap between the molds, and there is a problem that the crank radius increases and the rotational torque increases. Further, since the vertical movement is large, unstable conveyance is required, and a countermeasure is required, and there is a disadvantage that the number of auxiliary devices increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a pair of dies is provided in tandem in a material conveying direction, one of the pair of dies is fixed, and the other of the dies is fixed. A thickness reduction method and apparatus are provided in which the movable mass is reduced by using a movable mold, and the amount of vertical movement of the material to be formed is reduced by using a flat mold as the form of both fixed molds provided in tandem. The purpose is to:

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a pair of upper and lower molds is disposed in tandem with a molding material interposed therebetween, and one of the pair of upstream molds is disposed. The other mold is arranged as a fixed flat mold with the movable mold that performs a rolling operation, and the downstream mold pair is arranged with a movable mold on the opposite side of the upstream movable mold, and the other is a fixed flat mold. Tandem-type thickness reduction method characterized by arranging and alternately lowering and releasing an upstream die pair and a downstream die pair, and transporting a molding material by a transport device when the die pair is opened. .

The pair of upstream molds and the pair of downstream molds comprise a movable mold and a fixed flat mold, and the positions of the movable mold on the upstream side and the mold on the downstream side are set upside down. That is, since the flat mold is used as the fixed mold, the upper and lower surfaces of the molded object can be restrained with a small gap, and the vertical movement of the molded material can be suppressed and the thickness can be reduced during the conveyance in the flow direction.

According to the second aspect of the present invention, a pair of upper and lower molds is arranged in tandem with a molding material interposed therebetween, and the pair of molds is arranged such that an upstream side and a downstream side each have a movable mold and a fixed flat mold. The movable mold disposed on one of the upper and lower sides of the upstream mold pair and the movable mold disposed on the opposite side of the upstream movable mold of the downstream mold pair are oscillated. This is a tandem-type thickness reduction device provided with a swinging mechanism for alternately rolling down a material to be formed by a pair of dies and a downstream mold pair, and a transfer device for transferring the material to be formed.

[0010] The upstream mold pair and the downstream mold pair are composed of a movable mold and a fixed flat mold, and the mounting positions of the upstream movable mold and the downstream movable mold are upside down. . Since only one mold of the mold pair can move, the mass of the movable part can be reduced by half, and the acceleration / deceleration horsepower can be reduced by half. In addition, since a fixed flat mold is used, the gap between the upper and lower molds is tapered. Since the size of the swing mechanism can be made smaller than that of the mold, the rotation radius of the swing mechanism becomes smaller, and the driving torque can be reduced. Further, when the material to be molded after the completion of the reduction is conveyed, the material to be molded can be restrained with a small gap with a fixed mold, so that the up and down behavior of the material to be molded is reduced, and the material can be stably conveyed without meandering or the like. . In addition, the swing mechanism vertically moves the upstream movable mold and the downstream movable mold which are arranged upside down, thereby lowering the molding material with one mold pair and opening the other mold pair at the same time. That is, both dies can be operated in opposite phases. The oscillating mechanism that operates in this manner can be driven by one electric motor, and two sets of oscillating mechanisms can be provided for electrical interlocking. Conveyance 4 of the material to be formed is performed by the conveying device when the upstream mold pair and the downstream mold pair are opened.

According to the third aspect of the present invention, there is provided a reciprocating device for reciprocating the movable mold and the fixed flat mold of the upstream mold pair and the downstream mold pair in the flow direction of the molding material. The mold is moved to the downstream side at substantially the same speed as the moving speed of the material to be molded, and is returned to the upstream side when no pressure is applied.

By moving the movable mold and the fixed flat mold that are being lowered in the flow direction of the molding material at substantially the same speed as the molding material, the molding material can be continuously reduced.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a tandem-type thickness reduction device according to a first embodiment of the present invention. The tandem-type thickness reduction device includes an upstream mold pair 2 sandwiching a molding material 1 such as a slab, a downstream mold pair 3 on the downstream side in the flow direction of the molding material 1, and a pair of the two mold pairs 2. Frame 4 surrounding 3
And a swing mechanism 7. The upstream mold pair 2 includes an upstream movable mold 2a and an upstream fixed flat mold 2b, and the upstream movable mold 2a is provided above the molding material 1 and is in contact with the molding material 1. Consists of a horizontal plane and a tapered surface. The upstream fixed flat mold 2b is provided on the lower side, the surface in contact with the molding material 1 is a horizontal plane, and is attached to the mold holder 5 via the mold gap adjusting liner 6. The mold holder 5 is fixed to the frame 4.

The downstream mold pair 3 comprises a downstream movable mold 3a and a downstream fixed flat mold 3b, and the downstream movable mold 3a is
The surface provided below the molding material 1 and in contact with the molding material 1 includes a horizontal surface and a tapered surface. Downstream fixed flat mold 3
b is provided on the upper side, the surface in contact with the molding material 1 is a horizontal plane, and is attached to the mold holder 5 via the liner 6 for adjusting the gap between the molds. Mold holder 5
Is fixed to the frame 4.

At the top of the frame 4, there is provided a swinging mechanism 7 which rotates an eccentric shaft driven by an electric motor 8 and moves up and down. It is connected to the side movable mold 3a. Accordingly, when the eccentricity of the swing mechanism 7 reaches the bottom dead center, the upstream movable mold 2a is at the lowest position where the rolling reduction is completed, and the downstream movable mold 3a is at the lowest position where the maximum opening is achieved. Is the reverse of the above. Conveying devices 10a and 10b are provided on the upstream side and the downstream side of the tandem type thickness reduction device, respectively.
Eccentric shaft is approximately 1/4 of the lowermost position or uppermost position
While rotating, the molding material 1 is transported in the flow direction (line direction). The transfer devices 10a and 10b are configured by pinch rolls. In addition, since the upstream and downstream fixed flat molds 2b and 3b are used at the time of conveyance, the vertical movement of the molding material 1 can be suppressed. In the above description, the case where one eccentric shaft is used for the swing mechanism 7 has been described. However, the swing mechanism 7 may be provided for each of the upstream and downstream movable dies, and may be linked with each other by electric control. The movable mold may be a tapered mold or a flat mold.

Next, the operation will be described with reference to FIGS. FIG. 2 shows a state where the eccentric position of the swing mechanism 7 has reached the top dead center. In this case, the reduction of the shaded portion is completed in the downstream mold pair 3, and the upstream mold pair 2 is in the maximum open state. Swing mechanism 7
When the eccentric position moves downward from the top dead center, the downstream mold pair 3 opens and the upstream mold pair 2 starts closing. At the same time, the pinch rolls 10a and 10b press the downstream movable mold 3a between the molds in which the material 1 has been opened and press the downstream movable mold 3a while urging the mold 1 to open.

FIG. 3 shows a state where the eccentric position of the swing mechanism 7 has reached the intermediate position. The upstream mold pair 2 is in a state of being closed from an open state, and in a state of 1/4 rotation as shown in the figure,
The tapered portion of the upstream movable mold 2a of the molding material 1 comes into contact with the inclined portion of the molding material 1, and the traveling of the molding material 1 stops. From this state, the reduction by the upstream movable mold 2a starts, and when it is further rotated ４, the state shown in FIG. 4 is obtained.

FIG. 4 shows a state in which the eccentric position of the swing mechanism 7 has reached the bottom dead center. In this case, the reduction of the shaded portion is finished in the upstream mold pair 2, and the downstream mold pair 3 is in the maximum open state. When the eccentric position of the swinging mechanism 7 moves upward from the bottom dead center, the upstream mold pair 2 opens and the downstream mold pair 3 starts closing. At the same time, the upstream movable mold 2a is pressed by the pinch rolls 10a and 10b between the molds in which the molding material 1 is opened, and is pushed in while energizing the opening.

FIG. 5 shows a state in which the eccentric position of the swing mechanism 7 has reached the intermediate position. The downstream mold pair 3 is closing from the open state, and when the molding material 1 moves, the tapered portion of the downstream movable mold 3a comes into contact with the inclined portion of the molding material 1 so that the molding material 1 moves. Stops. From this state, the reduction by the downstream movable mold 3a starts. The material 1 is reduced while repeating the above operation.

Next, a second embodiment will be described. FIG. 6 shows the second
1 shows a configuration of a tandem thickness reduction device of an embodiment. FIG.
In the first embodiment shown in the above, the molding material 1 cannot be moved during the rolling down by the intermittent conveyance method, but is moved between the rolling down process of the upstream mold pair and the rolling down process of the downstream mold pair. I have. On the other hand, the second embodiment is a running press method in which the workpiece 1 is moved even during rolling. 1 have the same functions. The upstream movable mold 2a is horizontally slidably supported by the movable mold slider 11,
The upstream fixed flat mold 2b is similarly supported by the fixed flat mold slider 13. The movable mold slider 11 is connected to the swing mechanism 7 by a connecting rod 9a, and the fixed flat mold slider 13 is attached to the mold holder 5 via the liner 6 for adjusting the gap between the molds. The cylinders 12 that reciprocate the molds 2a and 2b in the horizontal direction are provided on both mold sliders 11 and 13. The downstream mold pair 3 has a similar structure.

Next, the operation will be described. The overall operation is the same as in FIGS. 2 to 5, except that the upper and lower dies are moved by the cylinder 12 at substantially the same speed as the workpiece 1 during the pressing shown in FIGS. In addition, the mold is released from the cylinder 12
To move to the upstream standby position. Thereby, it is possible to suppress the impact force due to the inertia of the molding material 1 without stopping the molding material 1 and continuously reduce the pressure.

In the above-described embodiment, the movable mold has the upper side on the upstream side and the lower side on the downstream side.
The downstream side may be the upper side.

[0023]

As is apparent from the above description, according to the present invention, the acceleration / deceleration power is reduced by half by driving one of the mold pair as a movable mold and the other as a fixed mold and driving only the movable mold. So that the total power can be significantly reduced,
When the fixed mold is a flat mold, the gap between the upper and lower molds is small, the amount of eccentricity is reduced, and the rolling torque can be reduced.
Also, an upstream mold pair and a downstream mold pair consisting of a movable mold and a fixed flat mold are provided, and the upstream movable mold and the downstream movable mold are installed upside down. And the eccentric shaft for vertically moving the downstream movable mold can be operated in the same phase, and the swing mechanism and the electric motor for driving the swing mechanism can be one each. In addition, a swing mechanism is provided for each mold pair, so that the swing mechanism can be electrically interlocked easily. Furthermore, by using a fixed flat mold, the up and down behavior of the material to be formed during transport in the flow direction is suppressed,
Stable transport is possible. Further, since the material to be molded can be lowered by continuous conveyance, the impact force generated from the material to be molded can be suppressed and the weight of the apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 shows the operation of the first embodiment, in which the eccentric position is the top dead center.

FIG. 3 shows the operation of the first embodiment, in which the eccentric position is an intermediate position.

FIG. 4 shows the operation of the first embodiment, in which the eccentric position is the bottom dead center.

FIG. 5 shows the operation of the first embodiment, in which the eccentric position is an intermediate position.

FIG. 6 is a configuration diagram of a second embodiment of the present invention.

FIG. 7 is a configuration diagram of a conventional thickness reduction press.

FIG. 8 is a configuration diagram of a conventional tandem type thickness reduction press.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molded material 2 Upstream mold pair 2a Upstream movable mold 2b Upstream fixed flat mold 3 Downstream mold pair 3a Downstream movable mold 3b Downstream fixed flat mold 4 Frame 5 Mold holder 6 Liner Reference Signs List 7 swing mechanism 8 electric motor 9a, 9b connecting rod 10a, 10b transfer device 11 slider for movable mold 12 cylinder 13 slider for fixed flat mold

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Shiro Nagata 1st Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima-Harima Heavy Industries, Ltd. Inside the Yokohama Engineering Center (72) Inventor Kenichi Ide Isogo-ku, Yokohama-shi, Kanagawa No. 1 in Shin-Nakahara-cho Ishi Kawashima-Harima Heavy Industries, Ltd. Yokohama Engineering Center (72) Inventor Hajime Ishii No. 1, Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Ishi Kawashima-Harima Heavy Industries Co., Ltd. in Yokohama Engineering Center (72) Inventor Masao Mikami 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima-Harima Heavy Industries Co., Ltd.In the Machinery and Plant Development Center (72) Inventor Takashi Nishi 1-1-1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima-Harima Heavy Machinery Co., Ltd. Machinery & Plant Development Center (72) Inventor Hayato Murata 1-1-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Nippon Kokan Co., Ltd. 4E087 BA13 CA02 EA11 EC01 GA06

Claims (3)

[Claims] 1. A pair of upper and lower molds are arranged in tandem with a molding material interposed therebetween, and one of an upstream mold pair is arranged as a movable mold for rolling down and the other mold is arranged as a fixed flat mold. Further, in the downstream mold pair, a movable mold is arranged on the opposite side of the upstream movable mold, and a fixed flat mold is arranged on the other side, and the upstream mold pair and the downstream mold pair are alternately arranged. A tandem-type thickness reduction method characterized in that the material to be molded is conveyed by a conveying device when the mold pair is opened, while being lowered and released. 2. A pair of upper and lower molds are arranged in tandem with a molding material interposed therebetween, and the mold pairs each include a movable mold and a fixed flat mold on the upstream side and the downstream side, respectively. The movable mold arranged on one of the upper and lower sides of the mold pair and the movable mold arranged on the side opposite to the upstream movable mold of the downstream mold pair are swung to form the upstream mold pair and the downstream mold. A tandem-type thickness reduction device, comprising: a swing mechanism for alternately rolling down a molding material by a pair; and a transport device for transporting the molding material. 3. A reciprocating device for reciprocating a movable mold and a fixed flat mold of the upstream mold pair and the downstream mold pair in a flow direction of a molding material is provided. 3. The tandem-type thickness reduction device according to claim 2, wherein the mold is moved to the downstream side at substantially the same speed as the moving speed, and is returned to the upstream side when the pressure is not reduced.