System and method for cutting to length long rolled products coming from different strands of a rolling mill

Patent metadata

Field	Value
Publication number	US-10994348-B2
Application number	US-201414902988-A
Country	US
Kind code	B2
Filing date	Jun 26, 2014
Priority date	Jul 5, 2013
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A system for cutting to length at least two strands of long rolled products (3, 5) preferably coming from a hot rolling mill. The system includes shears comprising at least two rotatable drums (4,6), each drum having a cutter (8,8′,10,10′) arranged to cut simultaneously at least two strands of long rolled products into finished segments. The system further includes at least two movable guides (12,14), each including at least two channels, each guide arranged to receive and guide at least one strand (3,5) of long product. The guides are movable between a position wherein, in operation, the strands of long product are located in positions either outside of the trajectory of the cutters in a position wherein the strands cannot be cut or wherein the strands are located on the trajectories of the cutters and can be cut by the cutters.

First claim

The invention claimed is:

1. A system for cutting to length first and second strands of long rolled products coming from a rolling mill, the system comprising:
a shear comprising at least two rotatable drums, each drum having a cutting device including a knife, the at least two cutting devices being arranged to simultaneously cut the first and second strands of the long rolled products as they pass the drums, into finished segments;
a first moveable strand guide comprising at least two first channels followed by at least two second channels in a second movable strand guide and a space separating an outlet of each of the first channels from a respective inlet of each of the second channels, each of the first channels of the first strand guide communicating with a respective second channel of the second strand guide;
each first channel being configured to receive and guide one of the first and second strands of the long rolled products from an inlet of the first channel through the outlet of the first channel, into the inlet of the second channel through an outlet of the second channel;
the first and second strand guides being pivotable between a non-cutting position at which the first and second strands are not cut and a cutting position at which the first and second strands are cut, wherein during operation of the system, the first and second strands of long products pass along the first and second guides outside of a trajectory passing the cutting devices in non-cutting positions at which the strands are not cut and when the first and second guides are pivoted into cutting positions, the first and second strands are located on trajectories passing the cutting devices where the strands are cut by the cutting devices; and
wherein means for pivoting the first and second guide strands are configured to selectively pivot the first and second strand guides between a first and a second non-cutting position;
in the first non-cutting position, the first and the second strands are both outside of the respective trajectories of the first and second cutting devices, wherein the first strand is between the first and the second cutting devices and the second strand is outside the first cutting device and not between the first and second cutting devices; and
in the second non-cutting position, the first and second strands are also both outside of the respective trajectories of the first and the second cutting device, wherein the second strand is between the first and the second cutting devices and the first strand is outside the second cutting device and not between the first and second cutting devices; and
the first and the second movable strand guides pivot the first and the second strands in a first direction from the first non-cutting position to the second non-cutting position and pivot the first and the second strands in a second direction from the second non-cutting position to the first non-cutting position, where the first direction is opposite the second direction, and wherein the pivoting of the guides between the first and second non-cutting positions places the first and second strands along the trajectories passing the cutting devices to cut the first and second strands of the rolled product.

2. A system according to claim 1 , wherein the cutting device of each drum comprises a knife for cutting a respective one of the at least two strands at each drum.

3. A system according to claim 2 , wherein the respective knife of each drum has a substantially circular trajectory when rotating with the respective drum, and the knife trajectories are contained in parallel vertical planes.

4. A system according to claim 3 , wherein at least one knife of each drum is located such that its circular trajectory is contained in one vertical plane.

5. A system according to claim 1 , wherein the first and second guides are supported to be pivotable between the cutting and the non-cutting positions thereof.

6. A system according to claim 1 , wherein the first and second guides comprise a spacer extending between the neighboring channels of the respective guide and the spacer horizontally spacing apart each channel relative to the other neighboring channel of the respective guide.

7. A system according to claim 1 , wherein each of the at least two drums has a respective axis, and the axes of the drums are located in the same vertical plane and extend parallel to one another.

8. A system according to claim 7 , wherein the knife of each drum is aligned on a line parallel to the axis of the drum.

9. A system according to claim 1 , wherein the means for pivoting comprises a plurality of pivoting devices, each connected to a respective connector of a guide, each pivoting device comprising a crank and a connecting rod assembly connected to the respective guide and is configured to cyclically translate each corresponding guide in directions between the cutting position and each of the first and second non-cutting position.

10. A system according to claim 1 , wherein the first and second strands are supported strands are supported to run spaced apart past the strand guides; the strand guides are located both prior to and after the cutting devices, whereby the strands pass the cutting devices and when the strands are cut, the cut parts of the strands pass the strand guides located after the cutting devices after the strands are cut.

11. A system according to claim 1 , wherein the cutting devices on each of the at least two drums are spaced apart leaving a space between the at least two drums and between the cutting devices.

Assignees

• Primetals Technologies Austria GmbH

Inventors

• Albè Roberto
• Bianchi Roberto
• Colombo Ezio

Classifications

• B23D36/00

  Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut · CPC title

• B21B15/00 Primary

  Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills · CPC title

• B23D25/12

  Shearing machines with blades on coacting rotating drums · CPC title

• B21B1/16

  for rolling {wire rods, bars, merchant bars, rounds} wire or material of like small cross-section · CPC title

• B21B2015/0014

  transversely to the rolling direction · CPC title