BE1020475A3 - TANDEM ROLLING SYSTEM OUTPUT AND OUTPUT METHOD WITH COUPLED WINDING CARROUSEL WITH ONLINE INSPECTION (II). - Google Patents

Description

INSTALLATION AND METHOD OF TANDEM ROLLER OUTPUT WITH COUPLED WINDING CARROUSEL WITH INSPECTION ONLINE

(II)

Object of the invention

The present invention relates to an industrial plant and process relating to the technical field of metal strip rolling mills, in particular tandem type with continuous winding station, having at the end of rolling an inspection table of the rolled product and in winding course.

Technological background and state of the art

The coil winding of coils, of carousel tension, which we shall call more simply carousel winding, is well known as a final winding system in continuous rolling, both at the cold rolling mill and hot rolling mill.

The winding sequence is as follows: the carousel is in the receiving position with the belt winder raised around the mandrel No. 1 in the lower position, the free mandrel No. 2 being in the upper position at 180 °; - Once the tape is primed, the belt retractor retracts and the winding of the reel No. 1 continues; - while the winding continues, the entire carousel rotates 180 ° in the direction of clockwise if the band comes from the left (if not in the opposite direction), which places the coil No. 1 during winding in the evacuation position and the free mandrel in the receiving position for the front end of the next web to be wound; - At the end of the winding of the coil No. 1, the power is transferred to the mandrel No. 2. Coil No. 1 is evacuated and the next winding cycle begins.

The embodiment details of the constituent means of the winding carousel such as the belt winder, the position of the mandrels, the device for supporting and evacuating the mandrels, etc. are well known to those skilled in the art.

A problem that arises is to detect as early as possible in the manufacturing process defects that can be unacceptable for the rolled strip, such as surface defects, geometry, thickness, flatness, etc. . A separate inspection of the line is not possible because it is disadvantageous from the point of view of the loss of time and therefore from the economic point of view.

[0006] JP 2000 254725 discloses a cold rolling plant comprising, mounted in this order on the line, a cold rolling mill, a movable shear which cuts the steel strip produced continuously by the rolling mill, an apparatus for double mandrel tension winding, of the carrousel winder type, which continuously coils the steel strip. The carousel winder is positioned downstream and below the cold rolling line and a surface inspection apparatus which inspects the surface of the steel strip, is located downstream on an extension of the line of pass that passes over the carousel coiler. The installation is provided with switching means for directing the strip towards the carousel reel or alternatively to the surface inspection apparatus, positioned outside the moving shear.

[0007] EP 1 581 355 discloses a method for rolling and winding a metal strip, in particular a steel strip, on a winding mandrel which is rotated and can be removed, which the metal strip is inspected in longitudinal portions with respect to rolling anomalies. The strip samples are produced by a drum shear located after the last rolling stand, guided and stopped "in line" inside the rolling line above a winding station located below the rolling line. rolling line, on an inspection table, for a free visual inspection.

The winding station is located under the plane of the inspection table, the latter being arranged "in line" with the rolling line. Here again, the steel strip emerging from the last rolling stand can be guided so that a baffle unit, arranged at the entrance of the winding station, can deflect the metal strip towards a winding mandrel.

[0009] Generally, the inspection table is provided with gripping means which make it possible to return the strip samples in order to also inspect the other face.

In addition, after the inspection on the inspection table, the tape samples are routed to a shear which reduces them to pieces before collection by gravity in a bin or waste car.

[0011] The solutions as described above have advantages over the separate off-line inspection: short access time and fast inspection, use only of a sample of the tape and therefore no need to remove a whole reel material flow. However, they have the disadvantage of using a switching system or deflector.

Goals of 11 invention

The present invention aims to enable the realization of a quick and inexpensive inspection of rolled metal strips in a rolling plant operating continuously, including the winding station.

The invention also aims to achieve a simple and reliable installation to perform this inspection.

The invention also aims to provide an installation that can fit into an existing line, where there is very little room in length.

Main features of invention

A first aspect of the present invention relates to a winding process and online inspection of a continuous rolled metal strip, comprising a step of continuous winding on at least one mandrel of a winding station , preferably carousel, characterized by at least the following steps: - the band is cut by a shear before winding, advance over a certain length on an introduction table so as to cover at least partially this and is cut a second time by the shears to obtain a sample; - The winding of the coil made on the mandrel is completed and the coil is removed from the winding station; in parallel, the introduction table carrying the sample is moved parallel to the rolling-winding line until it is in the extension of an inspection line comprising an inspection table; - the sample is inspected on the inspection table for defects; - Once the sample has left the introduction table, it is placed in the rolling-winding line, to allow the winding of a new coil.

According to preferred embodiments of the invention, the method comprises one or a suitable combination of the following steps: at the level of the inspection table, the strip sample is inspected on a first face, then returned and inspected on his second face; - after inspection, the sample is routed from the inspection table to an evacuation table, at the end of which is a second shear which cuts the sample into pieces which are then directed to a waste container or similar.

A second aspect of the present invention relates to a winding installation and online inspection of a continuous rolled metal strip, comprising, downstream of the last roll stand, a first shear, a winding station on at least one mandrel and an inspection table for detecting defects on at least one side of a sample of the strip, characterized in that the inspection table is part of a separate inspection line, parallel to the winding-winding line and in that the installation further comprises an infeed table, initially situated between the shear and the winding station in the winding-winding line and which can be moved from this line to the line d inspection by means of a conveyor, the introduction table for conveying to the inspection table a band sample obtained at the tail end by means of said shear by two successive sectioning of the nde to obtain a determined sample length corresponding at least partially to the length of the introduction table.

[0018] Advantageously, the winding station is a carousel station.

Still advantageously, the installation comprises, at the inspection table, clamping means for gripping the sample, to inspect the other side.

Still advantageously, in the inspection line, the inspection table is extended by a discharge table, at the end of which is a second shear to cut the sample into pieces, and a waste bin or the like.

Brief description of the figures

Figure 1 shows a plan view of the carousel winding station coupled with an inspection table according to a preferred embodiment of the present invention.

FIG. 2 represents two longitudinal sectional views, AA and BB respectively, of the carousel winding station according to FIG. 1.

Description of a preferred embodiment of the invention

A preferred embodiment of the installation according to the invention is shown in Figures 1 and 2.

The installation comprises, successively, at the outlet of the last cage of the tandem mill, in the direction of movement of the metal strip (line 100): - a first shear 4 for making a strip sample; an introduction table 6; a conveyor 15 making it possible to move the insertion table 6 parallel to itself, outside the rolling-winding line continuously; in a direction parallel to the continuous rolling-rolling line, successively, an inspection table 8 and clamping means 8 ', 8' 'of the strip sample, in order to turn it over; an evacuation table 12; a second shear 13; a waste bin 14; in the continuous rolling-winding line, a carousel 3 equipped with a first right upper mandrel 10 for the manufacture of a spool 1, 1 ', 1' ', etc., provided with a nose-mandrel support 9, a second lower left mandrel 20 for the manufacture of a coil 2, 2 ', 2' ', etc., provided with a nose-mandrel support 11 and a belt reel 5 for priming winding on the mandrel 20; -. evacuation means 16 of the completed coils 1, 1 ', 1' ', etc.

The sequence of operations performed on this installation is described below. The order in which the operations are described below is not necessarily (always) chronological. Some operations can run in parallel and be simultaneous.

Step 1

First, the speed of travel of the band and the speed of rotation of the mandrel of the right and upper 10 are decreased.

The strip of the coil called "No. 1" 1 (on the chuck right and upper 10) is cut a first time to the first shear 4, which generates a tape tail of the coil 1 which is going to be wound.

The tape is still Y meters on the introduction table 6 before being cut again by the shears 4, to obtain a sample that covers all or part of the length of the introductory table 6.

The conveyor 15 moves the introduction table 6 with the sample parallel to itself and to the rolling-winding line, until it is positioned along the inspection line, facing the to the inspection table 8. At this time the tape scrolling is stopped completely. During this time, the coil 1 is wound up completely.

The nose-mandrel support 9, supporting the right mandrel 10, is evacuated. The "No. 1" coil 1 is then removed from the right mandrel 10 and discharged with discharge means 16.

The cut sample advances on the inspection table 8 and the sample is inspected on a first face. The ends of the sample are pinched by pinching means 8 ', 8' 'and the sample is returned (not shown). The other side of the sample is inspected. The ends of the sample are "peeled off". The sample advances on the discharge table 12, at the end of which a shear 13 cuts the sample into pieces, which will then be directed to a bin or a waste car.

2nd step

Once the sample is passed on the inspection table 8 and the introduction table 6 is released, the latter is returned in the other direction by the conveyor 15, until it resumes its place in the rolling-winding line.

The next tape head advances on the introduction table 6 to the carousel winding 3 and the coil called "No. 2" 2 begins to be wound on the chuck left and lower 20. Once a few turns are wound, the belt winder 5 used for priming the winding of the band is evacuated. The winding speed increases.

The nose-mandrel support 11, supporting the left mandrel 20, is evacuated and the winding continued. During this one, the carousel 3 rotates 180 ° in the direction of clockwise.

Once the rotation of the carousel 3 is completed, the nose-mandrel support 9 is placed in position to support the new mandrel right and upper 10. The winding of the new coil "No. 2" 1 'continues so on the new right and upper chuck 10.

The nose-mandrel support 11 is placed in position to support the new mandrel left and lower 20. The belt winder 5 used for the initiation of the winding of the strip is put in the operating position.

Step 3

The tape speed and the speed of rotation of the mandrel of the right and upper 10 are decreased.

The tape of the coil "No. 2" 1 'is a first time cut to the shear 4, which generates a tape tail of the coil 1' which will be wound. The tape is further advanced Y meters on the introduction table 6 before being cut again by the shears 4, to obtain a sample that covers the entire length of the introduction table 6. The inspection is done then as above. The winding of the "No. 2" spool is completed and the spool evacuated. Once, the roll-winding return line introduction table, a "No. 3" coil 2 'will be able to be wound on the mandrel left and lower 10. Once a few turns are wound, the winder belt 5 is evacuated. The winding speed increases and so on.

Claims (7)

A method of winding and inspecting a continuously laminated metal strip in line, comprising a step of continuously winding on at least one mandrel (10, 20) of a winding station (3), preferably carousel, characterized by at least the following steps: - the band is cut by a shear (4) before the winding, advance over a certain length on an introduction table (6) so as to cover at least partially that and is cut a second time by the shears (4) to obtain a sample; - the winding of the coil made (1, 1 ', 1 ", etc.) on the mandrel (10) is completed and the coil is removed from the winding station; - In parallel, the introduction table (6) carrying the sample is moved parallel to the lamiriage-winding line to be in the extension of an inspection line comprising an inspection table (8); - the sample is inspected on the inspection table (8) for defects; - Once the sample has left the introduction table (6), it is placed in the winding-rolling line, to allow the winding of a new coil. 2. Winding and inspection method according to claim 1, characterized in that, at the inspection table (8), the strip sample is inspected on a first face, then returned and inspected on its second face. 3. A winding and inspection method according to claim 1, characterized in that, after inspection, the sample is conveyed from the inspection table (8) to an evacuation table (12), at the end which is a second shear (13) which cuts the sample into pieces which are then directed to a trash (14) or the like. 4. Installation for winding and on-line inspection of a metal strip rolled continuously, comprising, downstream of the last rolling stand, a first shear (4), a winding station (3) on at least one mandrel (10, 20) and an inspection table (8) for detecting defects on at least one side of a sample of the strip, characterized in that the inspection table (8) is part of a separate line said inspection device, parallel to the rolling-winding line and in that the installation further comprises an insertion table (6) situated initially between the shear (4) and the winding station (3) in the rolling-winding line which can be moved from this line to the inspection line by means of a conveyor (15), the introduction table (6) for conveying to the inspection table (8) a band sample obtained at the tail end by means of said shear (4) by two successive sectioning of the strip to obtain a determined sample length corresponding at least partially to the length of the introduction table (6). 5. Installation according to claim 4, characterized in that the winding station (3) is a carousel station. 6. Installation according to claim 4, characterized in that it comprises, at the inspection table (8), gripping means with clamps (8 ', 8' ') which allow to return the sample, to inspect the other side. 7. Installation according to claim 4, characterized in that, in the inspection line, the inspection table (8) is extended by an evacuation table (12), at the end of which is a second shear (13) for cutting the sample into pieces, and a waste bin (14) or the like.