JPH0710426B2 - Tool protector for die for forging continuous cast strand - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a continuous casting machine and a forging device including a die for forging the continuous cast strand drawn from the mold of the continuous casting machine. In the equipment provided with, for example, the die life is prevented by preventing the die from being worn or damaged which is caused when the dummy bar used at the time of pulling out the continuous casting strand is conveyed to the continuous casting mold through the above device. It is intended to further extend the.

(Prior art) In order to improve the internal quality of the slab obtained by continuous casting, in recent years, the continuous cast strand is vertically sandwiched in the vicinity of the solidification completion point of the continuous cast strand drawn from the continuous cast mold. Forging processing has come to be performed by a pair of dies (see Japanese Patent Laid-Open No. 63-183765).

(Problems to be solved by the invention) By the way, in such equipment, a dummy bar used in drawing out the continuous casting strand, when running backward to the continuous casting mold through a device equipped with a forging die, When pulling out an unsteady short slab due to breakout, the lower die of the forging machine and the conveyed product are in contact with each other, so that the die is inevitably worn and damaged, and the dummy bar is accidentally hit. In addition, there is a risk of causing troubles such as the dummy bar and the unsteady short cast piece falling between the forging device and the guide rollers provided before and after the forging device.

In this regard, the guide rolls and split guides dedicated to guiding and guiding the dummy bar and the short slabs from the inlet side to the outlet side of the forging machine (the inlet side to the outlet side of the forging die) Although it is possible to install a plate, such a guide roll or a guide plate has a relatively complicated structure and inevitably leads to an increase in the size of equipment, which may not be applicable to an existing forging device.

The present invention proposes a protector for a die for forging, which not only has a function as a guide when a dummy bar is conveyed or when an unsteady short cast piece is pulled out but also does not cause the problems described above. Is the purpose of.

(Means for Solving the Problem) The present invention is a metal mold protector for forging in the vicinity of the solidification completion point of a continuous casting strand drawn from a continuous casting mold, in the drawing direction of the continuous casting strand. Along with at least one arm that is swingably held via a pivot pin arranged in parallel, and a protection member that is connected to the swing end of the arm and covers the forging surface of the die, A protector for a die for forging of a continuous cast strand, comprising a drive device for swinging a main body of the arm together with a protective member.

1 (a) and 1 (b), among the pair of upper and lower molds in which the protector according to the present invention is installed in a forging machine, in particular,
Shown as an example when applied to a lower die, the number 1 in the figure is a forging machine that is arranged downstream of a continuous casting machine (not shown).
1a, hydraulic cylinders 1b, 1c, return cylinder 1d, frame body
It consists of 1e. 2a and 2b are an upper mold and a lower mold provided in the forging machine 1, and the molds 2a and 2b are arranged so as to sandwich a transport path line p of the continuous casting strand s between them. By the rotation of the crank shaft 1a of the forging device 1, the reciprocating motions of the respective dies are repeatedly approached and separated from each other, and the forging process is performed in the region near the solidification completion point of the continuous casting strand s. Reference numeral 3 is a protector for protecting the lower mold 2b. The protector 3 includes a pivot pin 3a, an arm 3b and a protective member 3c which are arranged parallel to each other along the drawing direction of the continuous cast strand. At this point, one end of the arm 3b is swingably held via the pivot pin 3a, while the swing end of the arm 3b is connected with a protective member 3c for covering the forging surface h of the die. It Also,
The body of the arm 3b has a stopper for regulating the positions of the drive device 4 such as a hydraulic cylinder for forcibly swinging the arm body around the pivot pin 3a and the arms 3b on both sides.
3d and 3e are provided.

(Working) The operation of the die of forging machine 1 is stopped (upper die 2a
And the lower mold 2b with the maximum opening interval), arm 3b
The protective member 3c is positioned above the lower mold 2b by actuating the drive unit 4 connected to the main body of the above and pushing up the arm 3b toward the continuous casting strand s as shown in FIG. 1 (a). The forging press working surface h of the die 2b is covered with the protective member 3c. In this state, for example, even if the dummy bar is fed backward, the dummy bar and the lower mold 2b do not come into direct contact with each other, so there is no possibility of damage or wear of the mold. As shown in FIG. 2, the forging process is performed after the arm 3b is pulled down by the drive device 4 until it hits the stopper 3e, so that the protective member 3c comes into contact with the mold and the continuous cast strand during the forging process. I'm not happy. The protector according to the present invention protects the processed surface h of the lower die so as not to directly contact the die with the die when the dummy bar or the like is conveyed through the forging device as described above. Since the member 3c guides and guides the conveyed objects such as the dummy bar, damage and wear of the mold,
It is possible to advantageously avoid troubles such as the dummy bar being caught or the unsteady short cast piece falling off.

FIG. 3 shows a multi-strand continuous casting machine according to the present invention, which also serves as a guide (two-strand case is shown).
4 (a) and 4 (b) show an example in which a side guide i also serving as a heat shield is provided in the apparatus shown in FIG. In particular, when the side guide i as shown in FIG. 4 is provided, it is possible to avoid an accident in which the slab comes into contact with the frame of the forging device when the slab is largely deformed left and right. .

In the above description, the case where the protector is installed only on the lower mold of the forging device is shown. However, when there is a possibility that the lift of the conveyed product frequently contacts the upper mold, the same applies. It goes without saying that the protective equipment having the above structure can also be installed on the upper mold. Further, although the protector 3 is shown as an integral long member extending along the longitudinal direction of the continuous cast strand S, this may be a divided structure,
Further, the protection member 3c may have a roller structure as shown in FIG.

(Effect of the Invention) Thus, according to the present invention, it is possible to avoid wear and damage of the forging die due to the dummy bar and the like, and to prolong the service life of the die significantly.

[Brief description of drawings]

FIGS. 1 (a) and (b) are explanatory views of the structure of a protector according to the present invention. FIG. 2 is an explanatory view of an operating procedure of the protector, and FIG. FIG. 4 is a diagram showing an applied example, FIGS. 4 (a) and 4 (b) are plan views of FIG. 3, and FIG. 5 is a diagram showing a modification of the protector according to the present invention. 1 ... Forging device, 2a, 2b ... Upper die, Lower die 3 ... Protector, 3a ... Pivot pin 3b ... Arm, 3c ... Protective member 3d ... Stopper, 4 ... Drive Equipment s ... Continuously cast strand, h ... Forging surface

Claims (1)

[Claims] Claims: 1. A protector for a mold for forging processing in the vicinity of a solidification completion point of a continuous cast strand drawn from a continuous casting mold, the pivot being arranged parallel to the continuous cast strand withdrawing direction. It consists of at least one arm that is swingably held via a pin, and a protection member that is fixedly held at the swing end of the arm and that covers the forging processing surface of the mold, and the arm protects the body of the arm. A protector for a die for forging of a continuous cast strand, comprising a drive device that swings together with the member.