JPH05146897A - Transfer press machine - Google Patents

Abstract

PURPOSE:To accurately press-form a metallic sheet inferior in formability for a long time by heating the metallic sheet to a temperature at which necessary formability is obtained at the pre-stage of pressing. CONSTITUTION:The metallic sheet 10 is heated by a heating device 3 to a temperature to obtain a necessary formability before it is pressed. The metallic sheet 10 is fed by a transfer device 2 in sequence to each press station and press-formed by dies 9. The dies 9 are provided with a temperature controlling means to always hold a fixed temperature. The thermal deformation of the dies is prevented in advance and the excellent formability of the metallic sheet and satisfactory accuracy are obtained continuously.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer press device for continuously pressing a metal plate while transferring it.

[0002]

2. Description of the Related Art As is well known, transfer press devices of this type have been widely used in the past, for example, when press-molding the body of an automobile.

By the way, this type of transfer press apparatus was developed for the purpose of forming a steel plate, but in recent years, other metal plates other than the steel plate, for example, an aluminum plate has also been formed. In some cases, steel plates and other metal plates are alternately formed.

[0004]

However, since the aluminum plate is inferior in formability to the steel plate, it is possible to press the conventional transfer press device developed for the steel plate as it is with high precision and efficient press. However, there has been a problem that it is necessary to replace the mold with a more accurate one or to repeat pressing in multiple stages. This applies not only to the aluminum plate but also to other metal plates which are inferior to the steel plate in press formability.

The present invention has been made in view of the above circumstances, and an object thereof is a transfer press capable of accurately and efficiently press-forming a metal plate such as an aluminum plate having poor formability. To provide a device.

[0006]

A transfer press apparatus according to the present invention holds a metal plate to be pressed by a main body of a press apparatus for pressing a metal plate as a work with a mold, and transfers the metal plate to the mold. A transfer device for taking out the pressed metal plate from the mold, a heating device provided in the preceding stage of the press device body for heating the metal plate transferred to the mold, and a temperature of the mold. And a temperature control means for keeping the temperature constant.

[0007]

Operation: By heating the metal plate to a predetermined temperature with a heating device prior to pressing, the formability can be improved and the pressing precision can be improved. Further, since the temperature of the mold is always kept constant by the temperature control means, it is possible to prevent the temperature of the mold from rising and causing thermal deformation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a schematic configuration diagram of a transfer press apparatus according to the present embodiment. In the figure, reference numeral 1 is a press apparatus main body, 2 is a transfer apparatus, 3 is a heating apparatus, and 4 is a cleaning apparatus.

The press apparatus main body 1 has a crown 5, an upright 6, a slide 7 and a bed 8 as main components, and a plurality of pairs of lower surfaces of the slide 7 and the upper surface of the bed 8 are arranged along the line direction. (In the illustrated example, four pairs of dies) 9 are provided, and a series of press forming is sequentially performed on the metal plate 10 which is a work by these dies 9.

The transfer device 2 is for sequentially moving the metal plate 10 forward (to the right in FIG. 1) in conjunction with the operation of the press device body 1. In this embodiment, the transfer device 2 is a suction cup 11 (vacuum cup). Thus, the metal plate 10 is detachably adsorbed and held, and is reciprocally moved back and forth along the guide rail 12.

The heating device 3 is for heating the metal plate 10 to, for example, about 200 to 300 ° C. before transferring it to the press device body 1. As the heating device 3, for example, a high-frequency heating system, a device that heats a high-temperature material by bringing it into contact with the metal plate 10, or a flame or high-temperature gas is directly blown onto the metal plate 10 to heat it. Various types such as those can be appropriately adopted. Further, the entire surface of the metal plate 10 may be heated or may be locally heated. Further, either one of the upper surface and the lower surface of the metal plate 10 may be heated, or both the upper and lower surfaces may be simultaneously heated.

The mold 9 is always kept at a constant temperature by a temperature control means (not shown). The temperature control means may be, for example, one that holds the mold 9 at a constant temperature around room temperature by cooling it, or heats the mold 9 and is heated by the heating device 3 described above. It may be held at a temperature equal to the temperature of the metal plate 10, but in any case, the mold 9
The temperature is kept constant to prevent thermal deformation thereof.

Although the cleaning device 4 is for cleaning the metal plate 10 before heating it, it may be omitted if it is unnecessary.

In the transfer press apparatus having the above-mentioned structure, when the metal plate 10 as a work is inferior in formability to a steel plate, for example, an aluminum plate, the heating device 3 is pressed prior to pressing the metal plate 10. By heating to a desired temperature, the formability can be improved to the same degree as that of the steel sheet. As a result, it becomes possible to perform press forming on a metal plate, which was difficult to form with a press machine of this type in the past in terms of formability, and press forming with a more complicated shape is possible. Can be performed with high accuracy. Also, for example, when an aluminum plate is formed, the die 9 can be used also when a steel plate is pressed, and the required number of times of pressing can be made approximately the same as in the case of a steel plate.

When the metal plate 10 is heated and then pressed as described above, the high temperature metal plate 10 is used as the mold 9.
Therefore, the temperature of the mold 9 may rise and thermal deformation may occur if it is left as it is. However, in the above apparatus, the temperature of the mold 9 is always kept constant by the temperature control means. The temperature rise of the mold 9 and its thermal deformation can be prevented in advance, so that high-precision pressing can be continuously performed for a long time.

The heating temperature of the metal plate 10 is the same as that of the metal plate 1.
It goes without saying that it may be set appropriately so that optimum moldability is obtained according to the type of 0. Further, when heating is not required as in the case of forming a metal plate having excellent formability such as a steel plate, the operation of the heating device 3 is stopped or the heating device 3 is bypassed to press the metal plate. You can send it to 1. Of course, the configurations of the press device body and the transfer device are not limited to those in the above embodiment.

[0017]

As described in detail above, in the transfer press apparatus of the present invention, a heating device for heating a metal plate as a work is provided in the preceding stage of the main body of the pressing device, and the heating device is used for pressing. Since the metal plate is configured to be heated in advance, it is possible to perform highly accurate molding on a metal plate having poor moldability. Further, since the temperature control means for keeping the temperature of the mold constant is provided, it is possible to prevent the temperature of the mold from rising and causing thermal deformation, and it is possible to achieve high accuracy for a long time. The molding can be carried out continuously.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a transfer press apparatus that is an embodiment of the present invention.

[Explanation of symbols]

 1 Press Device Main Body 2 Transfer Device 3 Heating Device 9 Mold 10 Metal Plate (Work)

Claims (1)

[Claims] 1. A press device main body for pressing a metal plate, which is a work, with a mold, and a metal plate to be pressed are held and transferred to the mold, and the pressed metal plate is taken out from the mold. Transfer device, a heating device provided in the preceding stage of the press device body for heating a metal plate transferred to a mold, and a temperature control means for maintaining a constant temperature of the mold. A transfer press device characterized by the above.