JPS6255458B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a width pressing press for slabs, by providing a die moving device so that the front and rear ends of the slab can be pressed with one die without applying an eccentric load to the press. The present invention relates to a press die holding device that can accommodate various pushing lengths by adjusting the amount of movement of the die.

In hot rolling lines for thick plates at steel plants, in order to reduce the amount of crop that occurs during thick plate rolling and improve yield, a width press is used at the front and rear ends of the slab S as shown in Figure 8. Push-in part a
It is proposed that a

However, since the dimensions of the slab pushing part vary depending on the thickness and width of the slab, depending on the pushing length, an eccentric load may be applied to the press, which may have an adverse effect on the press. or,
In order to increase this, it is conceivable to replace the dies according to the pushing length, but this requires a large number of spare dies, and there is a risk that the replacement will take time and reduce production efficiency.

In view of this, the present invention provides a die holding device for a press that does not apply eccentric loads to the press and can also reduce the cycle time of the press by making it possible to press the front and rear ends with one die. A die holder equipped with a die in the crosshead and movable in a direction perpendicular to the direction of movement of the crosshead, and the amount of movement of the die holder in the direction perpendicular to the direction of movement of the crosshead. The invention is characterized in that it is provided with a stopper device for adjusting.

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

Figure 1 is a plan view of the press. In the figure, 1 is a crosshead, 2 is a die holder attached to crosshead 1, and 3 is a die attached to die holder 2. The crossheads 1 and 1 are placed opposite each other. A cylinder device allows it to move forward and backward in synchronization.

The details of the crosshead 1, die holder 2, and die 3 will be explained with reference to FIGS. 2 and 3. Sliding liners 5 and 6 are inserted into the groove 4 extending in the longitudinal direction of the slab S provided at the tip of the die 3. Die holder 2
are fitted together so that the die holder 2 can be slid along the groove 4 by a fluid pressure cylinder 7 mounted on the front surface of the die holder 2, and stoppers 8 and 9 for positioning the die holder 2 are arranged on the front surface of the die holder 2, A die 3 is detachably attached to the front surface of a die holder 2. The positions of the stoppers 8 and 9 can be adjusted in a direction parallel to the sliding direction of the die holder 2. This position adjustment can be performed automatically or manually, and preferably can be controlled remotely. Furthermore, the movement of the die holder 2 may be performed by a rack and pinion method instead of using the hydraulic cylinder 7.

Next, the operation of the present invention will be explained.

During operation, first, as shown in Fig. 4, the dimension from the press center L to the point A at one end of the die 3 is l/2 for the pushing length l on the tip side of the slab S.
The die holder 2 is moved by the fluid pressure cylinder 7 so that
Next, the slab S is conveyed by a table roller (not shown), and when the leading end of the slab S reaches a position 1/2 from the press center L, the crossheads 1, 1 are advanced by the cylinder device, and the slab Press down the tip side of S to form a pressed part of length l.
Since the pushing part is not eccentric with respect to the press center L, no eccentric load is applied to the press.

When the pushing of the tip of the slab S is completed, the crossheads 1, 1 are moved back to the original position where the slab can pass, and the die holder 2 is moved by the hydraulic cylinder 7, and the press is pressed as shown in FIG. The dimension from the center L to the other end opening of the die 3 is l/
2 and the slab S by the table roller.
is advanced to position the rear end of the slab S at a position 1/2 from the press center L, and the crossheads 1, 1 are advanced to press the rear end side of the slab S to form a pushed-in portion having a length l.

Once the rear end of the slab S has been pushed in, move the crossheads 1 and 1 back to their original positions, and also move the die holder 2 to the position shown in Figure 4 and wait for the next slab to be sent. . When the pressing length l is set to l', the die holder 2 is moved so that the dimension from the press center L to one end A becomes l'/2.

In order to make the pushing length l a predetermined length,
As shown in Figures 6 and 7, the slab S is
If it is inserted between the dies 3 and 3, it can be pushed in without moving the die holder 2, but in this case, the center of the pushing part is at e
Since the press is eccentric, a large eccentric load is applied to the press, which is undesirable.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

According to the press die holding device of the present invention () By moving the die holder, it is possible to press the slab by aligning the half of the pressing length with the center of the press, so that eccentric load is not applied to the press. It never hangs.

() Since the die is made versatile and one die can form the front and rear ends of the slab, there are fewer spare dies and the cost of the die is lower.

() There is no need to replace the die, and the die can be moved in parallel with the slab feeding time, so the cycle time is not affected and work efficiency is good.

Various excellent effects can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a press equipped with the die holding device of the present invention during molding, FIG. 2 is a side view of the die holding device of the press of the present invention, and FIG. 3 is a view taken in the − direction of FIG. 2. , Fig. 4 is an explanatory diagram of pressing the tip of the slab, Fig. 5 is an explanatory diagram of pressing the rear end of the slab, and Fig. 6 is an explanatory diagram of pressing the tip of the slab without moving the die holder. FIG. 7 is an explanatory view of pressing the rear end of the slab without moving the die holder, and FIG. 8 is an explanatory view of pressing the front and rear ends of the slab. In the figure, 1 is a crosshead, 2 is a die holder, 3 is a die, 7 is a fluid pressure cylinder, and 8 and 9 are stoppers.

Claims (1)

[Claims] 1. The crosshead is provided with a die holder equipped with a die and movable in a direction perpendicular to the direction of travel of the crosshead, and a stopper device for adjusting the amount of movement of the die holder in the direction perpendicular to the direction of travel of the crosshead. A press die holding device featuring: