WO2009127790A1

WO2009127790A1 - Device and method for winding sheared waste from steel band edges

Info

Publication number: WO2009127790A1
Application number: PCT/FR2008/000544
Authority: WO
Inventors: Xavier Boissier
Original assignee: Siemens Vai Metals Technologies Sas
Priority date: 2008-04-16
Filing date: 2008-04-16
Publication date: 2009-10-22
Also published as: CN102066017B; EP2279049A1; CN102066017A

Abstract

The invention relates to a device and method for winding sheared waste obtained from the edges of continuously moving steel bands, including: an edge shear (CR) which diverts the edges into a chute (G1) that conveys same to an accumulation chamber (2) in which the edge waste is stored in the form of a ball (1); a bundling drum (7) including a winding axis located between two side faces of said drum; and a handling means (4) designed to direct the end of the ball from the accumulation chamber to the winding axis in order to initiate the winding of the ball. According to the invention, the device also includes a winding mandrel (6) which can be inserted along the winding axis of the drum through a central opening in one of the side faces of the drum. In mandrel insertion mode, a counter pressure element (722, 723) engages coaxially with the mandrel and the end of the ball is clamped between said counter pressure element and mandrel.

Description

Device and method for reeling shearing scrap from steel strip edges

The present invention relates to a device and a method for reeling shears from shearing strip steel strip according to the preamble of claims 1 and 6.

The invention relates to the transformation of steel strips in continuous scrolling, in particular continuous shearing of the lateral edges or banks of said strips.

In particular, lateral edges of the rolled steel strips may have, after hot rolling, defects of different types, including cracks or "cracks" which must imperatively be eliminated before continuing the processing operations of the strip, by cold rolling for example, in order to eliminate breaks on the band during these operations. On the other hand, the rolled strips must be put to a required width and within the tolerances required before being placed in the customer's place in the form of reels. For this, we practice a shearing of the side edges of moving strips with circular blade shears simultaneously cutting the two edges of the edges. Such shears are used, as the case may be, at the outlet of a stripping or continuous annealing line, between stripping and rolling sections of combined lines or on lines specifically devoted to shearing.

The shearing of the edges of strips produces two continuous drops of width which can vary from a few millimeters to a few tens of millimeters (a few millimeters) which must imperatively be evacuated effectively from the shears in order to avoid any accumulation or swelling which would require the stopping of the online operation and thus of the entire installation concerned. Two techniques are used for this purpose:

- The continuous splitting of the ribbons of banks on machines called "cut falls" consisting of rotating drums equipped, for shearing, multiple blades arranged perpendicularly or inclined relative to the scrolling banks. Such devices are effective, but the precision required by the relative position of the blades of each rotating drum makes their delicate construction and the inevitable wear of the blades requires stops for their replacement.

- The other technique is to bunch the falls on a chuck, it has on the first the advantage of a principle of simpler construction, does not require stops for a change of tools, but poses specific problems that the present invention tends to solve.

The bundling device must be able to reel the shearing shear from the two shearing heads on either side of the width of the strip. In practice, the falls have a thickness ranging from less than 1 mm to more than 5 mm, a small width that can vary from a few millimeters to a few tens of millimeters, and scroll at a speed of several meters per second. A crucial point is to ensure a transfer of the falls from the shear blades to the bundling device, then their engagement on a winding axis to initiate the reel. A technique is now employed which, with a few variations, consists in guiding the falls at the exit of the shearing blades into chutes which widen to a chamber or accumulation pit preceding the bundling device. By multiplication of swellings or jams formed by accumulation of falls in the form of pelota, no automatic introduction device falls in the baler has been, so far, effective enough and reliable to ensure a discharge of falls at a rate correct in relation to the continuous scrolling of the strip to be sheared. The introduction, that is to say the supply of at least a ball head of the accumulation chamber towards the winding axis to initiate the winding of the ball, is therefore performed by an operator installed in a protected area of the accumulation chamber and equipped with a long hook allowing him to bring the falls to a chute of introduction in the botteleur. It monitors the operation and intervenes whenever necessary to avoid jams and reintroduce falls after a fall of the falls. This workstation is particularly painful and requires a high level of handling.

An object of the present invention is to provide a device and a method and thus to automate a coil reeling of shearing shears strip steel, so in particular to avoid direct human intervention.

The invention thus has such a device and such a method according to claims 1 and 6.

A set of subclaims also has advantages of the invention.

The invention thus provides a device for reeling shearing slips from continuous strip steel strip edges, comprising:

- shear shears drifting the banks in a feed chute to a bank accumulation chamber in the form of a pelota,

a bundling drum comprising a winding axis between two lateral faces of said drum,

a gripping means adapted to bring a ball head of the accumulation chamber towards the winding axis to initiate the winding of the ball, said device according to the invention also comprises:

- a winding mandrel is insertable along the drum winding axis through a central opening of a side faces of said drum,

- In mandrel insertion mode, a counter pressure member cooperates coaxially therewith, by pinching the ball head with the mandrel.

By virtue of the interaction of the mandrel and the counter-pressure element, the shearing of the shearing falls according to the invention can be carried out without the need for human intervention.

In particular, the back-pressure element may advantageously comprise a coaxial pressure roller with the mandrel activatable in translation along the drum winding axis, ideally by a jack which ensures a longitudinal approach to the desired nip of the drum. pelota head between a section of the mandrel and a section of the pressure roller.

Another advantage of the invention is to provide the device with a gripping means coupled to an extensible arm, ideally telescopic. In this way, the operation of gripping pelota head from the accumulation chamber to the baler is automated in a simple movement. The said extensible arm has an extended mode, for which the gripping means can interact with a piston disposed in the accumulation chamber, the latter being adapted to compact, approach and force to hook the pelota head on said gripping means. After hooking the pelota head on said gripping means, the arm has a retracting mode for automatically bringing the pelota head secured to the gripping means to the winding axis on which follows the nip between the mandrel and the counter element. -pressure. Thus, the extensible arm provides, at the end of the retraction mode, a transient position of the gripping element such that the pelota head is brought into 1 'winding axis, while the mandrel is inserted partially to the pinch by cooperation of the counter-pressure element. This transient position makes it possible to place the gripping tool out of the pinching zone, while ensuring that the head of the ball is placed in the pinching zone. The mandrel can then be activated in rotation to engage the reel of the ball according to its axis of rotation. Simultaneously, the extensible arm can be retracted out of the baleing drum and thus increase its distance with the chuck in rotation, which allows to separate the pelota head from the gripping means while ensuring a securing of the ball in the pinching zone pelota with the mandrel.

A shear is disposed between the bale drum (while the mandrel is inserted between the two winding drum faces) and a balloon outlet of the accumulation chamber, activatable in section by an instantaneous gauge thickness measuring means. winding, ideally comprising a pressure roller or / and an optical system. Thanks to this shear, the continuous introduction of the accumulation chamber on the rotating mandrel (in the winding mode and for which the winding reaches its maximum capacity) is then stopped automatically. For example, the pressure roller which extends between the two side faces of the drum gives an insertion stop signal resulting in an activation signal of the moving ball cut at the input of the bale drum. Additionally, the pressure roller may also provide other winding condition measurement information signals such as an empty mandrel (pinch failed if the measured mandrel section thickness is / remains minimal) or an unexpected interruption of the core condition. introduction of ball (measured thickness of mandrel section in rotation greater than that of the mandrel and constant after a determined duration). Advantageously, the accumulation chamber is provided with a surveillance system by at least one camera enabling the local supervisor to check the smooth running of the operations.

The device described above thus forms an advantageous example of embodiment suitable for a method according to the invention for reeling shearing slips from continuous strip steel strip banks, comprising the following steps:

- introduction of sheared shoreline falls in a feed chute to an accumulation chamber where shoreline falls are formed into a pelota,

- Introduction into the accumulation chamber of a gripping means adapted to bring a head of the ball to a winding axis of a bale drum to initiate the winding of the ball between two side faces of said drum, characterized in that

stopping the gripping means in the vicinity of the winding axis so as to place the head of the ball on the winding axis,

insertion of a winding mandrel along the axis of winding of the drum through a central opening of one of the lateral faces of said drum,

- Clamping the ball head between the mandrel and a counter-pressure element cooperating coaxially with the mandrel.

As a result, any manual intervention is thus automated, while providing a simple and effective method of bundling balls.

The method also has the following features and steps: A) - in order to ensure a gripping of the pelota head by the gripping means in extended mode towards the accumulation chamber, compacting and maintaining a portion of ball on a side wall of the accumulation chamber are performed by a piston device located inside said chamber and acting perpendicularly to said wall,

- A recoil of the piston is initiated releasing the compacted portion of the ball as it is attached to the gripping tool;

B) - after the pinching of the pelota head, withdrawal / retreat of the gripping means out of the bale drum is carried out, ideally by telescopic means;

the joint rotation of the mandrel and the counter-pressure means then determines the beginning of winding of the falls;

C) - in chuck rotation mode a drop reel is generated between the two faces of the bale drum to a maximum diameter measured by a pressure roller,

- the maximum diameter reached, a shearing of the fall in the form of single band or pelote by a shear occurs between the bundling device and the accumulation chamber,

- Then, an introduction of the spool (or at least the winding mandrel) on a discharge conveyor is effected by means of a spoon which by pivoting allows the bale drum to release the wound mandrel.

Examples of implementation and application are provided using the figures described: Figure 1 Principle of operation of a shear shears and evacuation of falls in side view,

FIG. 2 (2a to 2i) Principle of operation of a device for reeling falls (or baler) according to the invention in side view,

Figure 3 Example of realization of a baler according to the invention in front view.

Figure 1 presents the principle of operation of a shear shears (CR) and of the evacuation of the falls (C) in lateral view, that is to say in the running direction of a strip (B) whose Shores are sheared to form the falls to be evacuated to a bottler.

The strip (B) thus passes through the shear cutter (CR) and the drop (C) emerging from the two circular blades (at the right and left internal edges of the strip) is deflected by a deflector (DF) towards a chute (Gl) towards a fragmentation or bundling device. The shear shears have two symmetrical heads, each cutting one of the two edges of the band.

In the case of fragmentation, the drop (C) arrives by an additive chute (G2) between rotary drums of a cutter (CC) whose knives ensure the fragmentation (CF) of the band sequentially and periodic over its width. It thus comes out of band blades whose size makes it possible to evacuate them more easily.

In the case of bunching, the fall (C) accumulated in an accumulation pit (not shown) is manually introduced with a clamp (P) or a hook in an additive chute (G3) leading to the baler. The fall is then wound on a rotating mandrel (M) and turns thus formed. are pressed and compacted by a pressure roller (RP) to form a coil (CB) around the mandrel.

FIG. 2 presents the principle of operation of the device for reeling falls (or baler) according to the invention in side view, as part of a complete process in the form of successive steps (FIGS. 2a, 2b, 2c). , 2d, 2e, 2f, 2g, 2h, 2i) since the arrival of sheared bank falls in the baler to a bobbin discharge conveyance filled by said baler.

Presented according to the set of FIGS. 2a to 2i is therefore a device for reeling shears from shearing strips of continuous strip of steel, comprising:

- A bank shear derives the banks in a feed chute (not shown) to the accumulation chamber (2) of the shore falls as a ball (1),

a bundling drum (7) comprising a winding axis between two lateral faces of said drum,

- A gripping means (4) adapted to bring a head of the ball of the accumulation chamber to the winding axis to initiate the reel of the ball,

a winding mandrel (6) insertable along the winding axis of the drum through a central opening of one of the lateral faces of said drum,

- In mandrel insertion mode, a counter-pressure element (still not shown, but shown in Figure 3, marks 722, 723) cooperating coaxially therewith, by pinching the ball head with the mandrel.

In step 2a, the fall arrives in an accumulation chamber (2) where it is left to proliferate and forms a ball (1).

In step 2b, as soon as the ball (1) arrives facing a piston (3), which can move parallel to the axis of rotation of the bundling mandrel, a thrust face of said piston pinches and compact slightly the ball head against an inner side wall of the accumulation chamber (2), said wall being located vis-à-vis the pelota introduction side on the mandrel in the bundling device and provided with an opening. In this way, compacting and holding a portion of ball on a side wall of the accumulation chamber is performed by the piston device located inside said chamber, said piston having its thrust face for compaction moving towards or away from said wall, for example finally when a recoil of the piston is initiated releasing the compacted portion of pelote as soon as it is hooked to the gripping tool.

In step 2c, an extensible arm (4) such as telescopic held until now in the withdrawing position of the accumulation chamber deploys until its end provided with a means or gripping tool (5) reaches via the opening of the wall the vicinity of the piston (3) and is in position to hook at least a portion of the compacted ball between the piston (3) and the side wall of the accumulation chamber (2).

In step 2d, after attachment of the ball (1) by the gripping tool (5), the piston (3) is removed from its compacting position and the telescopic arm (4) is positioned at the end of said ball in the axis of rotation of the mandrel (6) which, previously held in the retracted position out of the bundling device, is introduced by a drum side face into the bundling drum (7) until pinching the head of the ball against a back pressure device (shown in FIG. 3c, item 722) arranged coaxially with the mandrel and insertable by the other side face of the drum towards a mandrel section.

In step 2e, the gripping tool (5) releases the ball head, the mandrel (6) presses said ball head onto the backpressure device and then the mandrel rotates and forms in the drum bundling (7), a reel (9) whose fall turns are compacted by a pressure roller (8) whose axis of rotation extends between the two side faces of the drum parallel to that of the mandrel.

In step 2f, the coil (9) reaches its maximum diameter measurable by the pressure roller (8).

In step 2g, a strong shear (10) disposed between the bale drum and a balloon outlet of the accumulation chamber, is thus activatable in section by means of instantaneous thickness measurement of the winding, ideally comprising the pressure roller (8) or an optical system (light barrier on the outer surface of the drum). This strong guillotine (10) separating the accumulation chamber (2) of the bundling device thus cuts the ball and the mandrel (6) is rotated to complete the winding and compacting of the coil (9) thus formed.

In step 2h, the mandrel and the backpressure device are laterally separated from the baleing drum, and as a result, the filled spool (9) and disengaged from the drum falls out of the baler according to the invention by simple gravitation in an evacuation spoon (11) disposed under the drum.

Finally, in step 2i, the spoon (11) needle the coil (9) to a discharge conveyor (12) of full coils. The device according to the invention is then ready to resume its cycle according to Figure 2b and the following steps.

Only represented in FIG. 2i, the accumulation chamber comprises at least one camera, or even other optical detectors respectively making it possible to check the good follow-up of the steps (by an operator) and to indicate filling states of the chamber of accumulation with falls or the position of the piston as well as falls associated with it. Figure 3 shows a detailed example of realization of a baler according to the invention in front view. A fixed holding structure (61) receives a rotation system (62) of the mandrel (6) which can be moved along its axis of rotation between a bunching position as shown in Figure 3 (mandrel between the side faces (71)). , 72) of the drum (7)) to a standby position in which the mandrel (6) is completely out of the bale drum (7), that is to say out of its side faces. Said lateral faces (71, 72) of the bundling drum (7) consist of a first plate (71) open at its center to allow free passage of the mandrel (6) and rotatably mounted on bearings (711) themselves. mounted in the holding structure (61), as well as in a second plate (72) also rotatably mounted on bearings (721) and open at its center to pass the nose of a back pressure device (722) , such as a cylinder coaxial with the mandrel and having a solid section to be brought into contact with a solid section of the mandrel for gripping the ball. The nip sequence may be described as follows: the back pressure device (722) is held in the advanced position through the second platen (72), preferably flush with the inner face thereof; via the opposite end of the drum, the mandrel advances to an intermediate position, thereby pinching the ball against the back pressure device (722); the gripping member is then released from the pincushion by a forced withdrawal; the mandrel advances at the end of stroke by crushing the ball against the counter-pressure device (722), a jack (723) of which is controlled by pressure and which allows the backpressure device to move back under the thrust of the mandrel while retaining a sufficient pressure of pinching on the ball. In this way, the mandrel can go to the end of the race along the axis of the drum, whatever the thickness of the ball.

Claims

claims

1. Device for reeling shears from continuous strip steel strip shear scrap, comprising:

- a bank shear drifting the banks in a feed chute to a storage chamber (2) of the banks of banks in the form of a ball (1),

- A gripping means (4) adapted to bring a head of the ball of the accumulation chamber to the winding axis to initiate the reel of the ball, characterized in that

- a winding mandrel (6) is insertable along the drum winding axis through a central opening of one of the side faces of said drum,

- In mandrel insertion mode, a counterpressure element (722, 723) cooperates coaxially therewith, by pinching the ball head with the mandrel.

2. Device according to claim 1, wherein the back-pressure element comprises a pressure roller (722) coaxial with the mandrel activatable in translation along the winding axis of the drum, ideally by a jack (723).

3. Device according to one of claims 1 to 2, wherein the gripping means is coupled to an extensible arm, ideally telescopic, which, in extended mode, interacts with a piston (3) disposed in the accumulation chamber and adapted for compacting and hooking the pelota head on said gripping means.

4. Device according to claim 4, wherein the extensible arm provides a transient position of the gripping member such that the ball head is fed into the winding axis, while the mandrel is inserted partially.

5. Device according to one of the preceding claims, wherein a shear (10) is disposed between the bale drum and a ball outlet of the accumulation chamber, activatable in section by means of instantaneous thickness measurement winding, ideally comprising a pressure roller (8) or an optical system.

6. Device according to claim 5, wherein the pressure roller (8) extends between the two side faces of the drum.

7. A method of reeling shearing scrap from steel strip banks in continuous scrolling, comprising the steps of:

- Introduction of sheared bank falls in a feed chute to an accumulation chamber (2) where bank falls form in a ball (1),

- Introducing into the accumulation chamber a gripping means (4) adapted to bring a head of the pelota to a winding axis of a bale drum (7) to initiate the reel of the pelota between two lateral faces of said drum, characterized in that

- insertion of a winding mandrel (6) along the drum winding axis through an opening central of one of the lateral faces of said drum,

- Clamping the ball head from between the mandrel and a counter-pressure element (722, 723) cooperating coaxially with the mandrel.

The method of claim 7, comprising the steps of:

after gripping of the pelota head, withdrawal of the gripping means from the baleing drum, ideally by telescopic means,

- Joint rotation of the mandrel and the counterpressure means.

9. Method according to claim 7 or 8, for which:

- Compaction and maintenance of a portion of ball on a side wall of the accumulation chamber are performed by a piston device located inside said chamber, said piston having a thrust face for compacting itself. moving towards or away from said wall,

- A recoil of the piston is initiated releasing the compacted portion of the ball as it is attached to the gripping tool.

10. Method according to one of claims 7 to 9, for which:

- by rotation of the mandrel a drop reel is generated between the two faces of the bale drum to a maximum diameter measured by a pressure roller,

- then, a setting up of the coil on a conveyor evacuation is carried out via a spoon.