JPS6354441B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses an eccentric mechanism that reduces the width of the edge of the material while the material is running in width reduction rolling that performs etching (width reduction) in order to prevent the feed tail of the material that occurs during etching. The present invention relates to a width reduction rolling mill.

When a material such as a slab is width-reduced using rolls, rolling is performed through several passes until the width of the material reaches a predetermined width. In this case, when the material is edged between the rolls, a protruding part (unsteady rolling part) b called a fishtail as shown in FIG. It has occurred. The reason why this fishtail part b is formed is that both edges (corner parts) of the material a such as a slab that is in contact with the roll are sent forward and backward from the center part by the roll, and width loss increases. The amount generated is increasing.

Since the above-mentioned fishtail part b does not become a product, it is cut off from the cutting position c by a shear after rolling and removed as clotsupuros.
This is the current situation.

Therefore, the yield of slabs, plates, etc. produced from the material is significantly reduced.

As a means to solve the above problem, the present invention attempts to reduce the width of the material edge by using a so-called flying press, which presses the material edge while the material is traveling, to reduce the occurrence of fish tails as much as possible. A device that drives the left and right press rollers when the leading edge of the material reaches a predetermined position, with press rollers made by fitting hollow rollers on the outside of an eccentric pin on the shaft, arranged symmetrically on the left and right. It is characterized by the use of an eccentric mechanism.

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

As shown in FIGS. 2 and 3, an eccentric pin 3 is provided on the shaft 2, and a hollow roller 5 is fitted on the outside of the eccentric pin 3 via a circular ring 4 that functions as a bush bearing. 3, the hollow roller 5 can rotate freely, and the rotation of the shaft 2 causes the hollow roller 5 to rotate freely.
A press roller 1 is configured to integrally rotate eccentrically with an eccentric pin 3, and the press roller 1 is arranged symmetrically on the left and right, and both rollers 1,
1 is supported by an axle box 7 that slides in the left-right direction inside the housing 6 via a bearing 8, and the space between the left and right rollers 1, 1 is adjusted by moving the axle box 7 forward and backward with a screw 9. Further, the shafts 2 of each roller 1, 1 are driven in synchronization. 10 is a roll balance cylinder, and 11 is a material. In the present invention, although not shown, left and right press rollers 1,
Upstream of the material 11, there is a feeding device (rolling machine, pinch roll) that pinches the material 11, and there is also a material leading edge position detector that detects the leading edge position of the material 11. A drive command is given to the press rollers 1, 1 by the signal, and the rollers 1, 1 are rotated according to the advancing speed of the material 11, and the facing distance between the rollers 1, 1 is changed from the closest position to the farthest position. When the rollers 1, 1 are rotated to a certain point, the rollers 1, 1 are controlled to move backward.

Now, when the material 11 is sent in for etching, the ends of the material are reduced in width before being edged in a width reduction mill. First, when the tip of the material 11 is detected by a position detector (not shown), a drive command is given to the drive device of the press rollers 1, 1. The rollers 1 and 1 are set in advance at a predetermined spacing and are rotated so that they are closest to each other, so that when the tip of the material 11 is about to come into contact with the rollers 1 and 1. , the roller 1 also rotates, and the tip of the material 11 is largely crushed due to the eccentricity of the roller 1, as shown in FIG. As the material 11 advances, the roller 1 also rotates, and the roller 1 is gradually displaced in the direction away from the material 11. When the roller 1 rotates 180 degrees, the roller 1 is at the outermost position (see Figure 4). ). Therefore, while the roller is rotationally displaced as shown in FIG. 4, the width reduction of the leading end of the running material 11 is automatically performed. In this case, in the present invention, since the hollow roller 5 is provided on the outside of the eccentric pin 3, the hollow roller 5 can rotate following the progress of the material 11, and there is little stress on the roller 1 itself. Further, the roller 1 can also be rotated in a direction opposite to the traveling direction of the material 11 to perform width reduction. Even in this case, the hollow roller 5 can rotate without being reversed. Furthermore, by rotating the eccentric shaft at unequal angular speeds, the shape of the end of the slab can be formed with a linear inclination as shown in FIG.

When the rollers 1, 1 have rotated 180 degrees from the initial set position, the rollers 1, 1 are moved back to the left and right through the shaft box 7 by the reduction screw 9, and then the material 1 is
1 to wait for the width reduction of the rear end. Material 11
The width reduction of the rear end is performed while the material 11 is being edged in the width reduction mill, and the width reduction of the rear end can be performed by the reverse operation to the above.

As described above, by reducing the width of the end of the material before etching the material 11,
The edges of the material are passed through the rolls of the width reduction mill without being width-rolled, and therefore the edges of the material are not sent out by the rolls of the rolling mill, which greatly reduces the amount of tails produced. can.

As described above, when the apparatus of the present invention performs width reduction of the end of the material before the end of the material is edged, the width reduction is performed while the material is running without stopping. Productivity can be improved compared to when the material is stopped, and since the press roller has a hollow roller fitted on the outside of the eccentric pin, the hollow roller rotates freely and the roller itself It has excellent effects such as being able to be used as a guide roller without putting any strain on it.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a state in which fishtail portions are generated at the leading and trailing ends when a conventional rectangular material is width-reduced, and Fig. 2 is a plan view showing the arrangement of pressing rollers in the present invention. , 3rd
The figure is a cutaway side view showing the state in which the press roller is supported in the present invention, and FIGS. 4 and 5 are plan views showing the state in which the width reduction of the leading end of the material is performed in the present invention. 1... Press roller, 3... Eccentric pin, 5... Hollow roller, 6... Housing, 7... Axle box.

Claims (1)

[Claims] 1. Pressing rollers made by fitting hollow rollers on the outside of an eccentric pin on the rotating shaft are arranged symmetrically on the left and right, and when the leading edge of the material reaches a predetermined position, the left and right pressing rollers are driven. A width reduction rolling device using an eccentric mechanism, characterized in that it uses an eccentric mechanism consisting of a device.