Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
  • B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
  • B21B39/12—Arrangement or installation of roller tables in relation to a roll stand
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
  • B21B1/30—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process
  • B21B1/32—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a non-continuous process in reversing single stand mills, e.g. with intermediate storage reels for accumulating work
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
  • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
  • B21B2013/025—Quarto, four-high stands
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby

Definitions

• the present invention relates to an operating method for a reversing rolling mill that has at least one reversing stand for rolling a rolling material, two on either side of the reversing stand arranged roller conveyors for transporting the rolling material and ei ⁇ ne control means for controlling the reversing mill up,
• roller conveyors each comprise a plurality of roller table areas on ⁇ , each of which has at least one transport roller on ⁇ ,
• transport rollers of each roller table area are controllable independently of the transport rollers of the other roller table areas
• the rolling stock is conveyed such that a beginning of the rolling stock at an entry speed and an end of the rolling stock are transported at a discharge speed.
• the present invention relates to a trä ⁇ carrier with a computer program stored on the data carrier for carrying out such an operating method when the computer program is executed by a control device for a reversing mill.
• a control device for a reversing rolling mill which is designed in such a way is in particular programmed to the reversing of it a derarti- gen operating method according controllable.
• the present invention relates to a reversing mill and a rolling produced according to the operating method of the invention.
• the rolling stock passes several times in succession one and the same rolling stand, wherein the rolling ⁇ direction alternates in each case.
• the rolling stock must therefore be repeatedly accelerated and decelerated.
• the transport rollers must be repeatedly accelerated and decelerated.
• the schedulesge ⁇ speeds of the transport rollers should match as possible with the transport speed of the rolling stock. For Real ⁇ velocity moves between rolling and transport rollers adversely affect the quality of the rolling stock and pollute beyond the drives of the transport rollers.
• control device egg determined NEN time at which enters the rolling stock in the respective roller table area, and from this time, the Trans ⁇ port rolling of the immediately adjacent roller table area accelerated, in which the Walzgut enters next. through This procedure can be largely avoided unnecessary acceleration processes and unwanted network perturbations. But it is no longer guaranteed that the trans ⁇ port roll of the immediately adjacent roller table area have already achieved the transport speed when the rolling stock enters this immediately adjacent roller table area.
• the object of the present invention is to provide an operating procedure to provide for a reversing mill, by means of which it is possible, on the one hand unnecessary Accelerati ⁇ supply operations to avoid and required acceleration ⁇ processes time-distribute and provide on the other hand to be granted ⁇ that the peripheral speed of the Transport rollers is aligned with the transport speed of the rolling stock when the rolling enters the respective roller table area.
• the task for the data carrier is achieved in that a computer program is stored on it, which causes the execution of such an operating method when the computer program is executed by a control device for a reversing mill.
• the object is also achieved by a control device for a reversing mill, which is designed, in particular programmed, that the reversing mill can be controlled by it according to such an operating method. Furthermore, the object is achieved by a reversing mill, which is provided with such a control device.
• the control device Based on the current motivatesge ⁇ of the transport rollers of the roller table areas and the maximum possible acceleration speeds of the transport rollers of the relevant roller table areas the control device can therefore be expected to be when to begin adjusting the peripheral speed of the transport rollers of the respective roller table area.
• the starting time for the An ⁇ equal to the peripheral speed of the transport rollers to the - optionally time-dependent - inlet speed can therefore be determined properly in advance.
• the rolling stock is rolled in the reversing stand .
• they are also different from a circumferential speed of work rolls of the reversing stand.
• the present invention is to take also the special case with around ⁇ that a pure transport of the rolling stock takes place, the rolling stock during transport is therefore not converted.
• the control device before transporting the rolled material for at least one of the with respect to the respective conveying operation with respect to the re versiergerüsts downstream arranged roller table area ei ⁇ ne minimum period of time is determined, which is necessary to match the peripheral speed of the transport rollers of the relevant roller table area to the inlet speed, and delays the beginning of transporting the rolling and the peripheral speed of the transport rollers of the relevant ⁇ roller table area approaches the inlet speed, as long as the minimum period of time a transport time is equal to the difference between the entry time and the beginning of transporting the rolling stock.
• the control device controls at least for each ⁇ with respect to the respective transport process with respect to the Reversiergerüsts outlet side roller table arranged adjusting the peripheral speed of the transport rollers of the respective roller table area to the inlet speed according to an individual for the respective roller table range acceleration curve, the acceleration curve is determined such that a control reserve remains. Because then it is possible to correct unforeseen changes in Einlaufge ⁇ speed.
• the control reserve is realized in gegebe ⁇ ner maximum acceleration by the fact that the time period for matching the peripheral speed of the feeding speed determined is greater than the aforementioned minimum ⁇ period of time.
• the procedure described above can be taken not only on the outlet side, but also on the inlet side, as long as the beginning of the rolling stock has not yet reached the reversing stand.
• the control device determines at least for each ⁇ with respect to the respective transport process with respect to the Reversiergerüsts inlet side roller table individually a discharge time to the rolling stock at least expires from the respective roller table area, and controls its transport rollers such that their peripheral ⁇ speed at the earliest from the time of discharge, it is lowered below the discharge speed.
• the time at which the lowering of the peripheral speed is started should preferably be before the time at which the
• FIGS. 2 to 5 are flowcharts.
• a reversing rolling mill has a reversing stand 1, two roller conveyors 2, 3 arranged on both sides of the reversing stand 1, and a control device 4.
• the reversing stand 1 is used for the reversing rolling of a rolling stock 5, in particular a strip-shaped rolling stock 5.
• the roller tables 2, 3 serve to transport the rolling stock 5.
• the control device 4 causes the control of the reversing mill, so in particular the reversing stand 1 and the roller tables 2, third
• the roller tables 2, 3 each have a plurality of roller table areas 6.
• Each roller path region 6 has at least one transport roller ⁇ . 7
• the transport rollers 7 of each roller table area 6 are controllable by the control device 4 independently of the transport rollers 7 of the other roller table areas 6.
• at least one drive 8 is assigned to the transport rollers 7 of each roller table area 6.
• a computer program 9 for the control device 4 is first created.
• This computer program 9 is stored in (exclusively) machine-readable form on a data carrier 10.
• the data carrier 10 can be, for example, an internal data carrier of the control device 4 or another computer, not shown for the sake of clarity.
• the data carrier 10 may also be a portable data carrier 10 such as a CD-ROM 10, a memory card or a USB memory stick.
• the computer program 9 is loaded into the control device 4 and stored there, for example te their Festplat ⁇ . If the computer program 9 due to appropriate Calling conditions (eg, a user input) called, controls the control device 4, the reversing mill in accordance with an operating method, which will be explained in more detail below in connection with FIGS 2 to 5. By storing the computer program 9 in the control device 4 since this ⁇ forth is programmed or configured general.
• appropriate Calling conditions eg, a user input
• the control device 4 accepts various parameters in a step S1. So assumes the Steuereinrich- tung 4 in step Sl, first an initial position pA gene entge ⁇ .
• the initial position pA characterizes the position Pa of a beginning 11 of the rolled product 5 at the current time t.
• the control device 4 also accepts a corresponding end position pE of an end 12 of the rolling stock 5 at the momentary time t.
• the control device 4 accepts a transport speed vT of the rolling stock 5.
• the transport speed vT indicates with wel ⁇ cher speed, the rolling 5 the reversing should be performed 1 to ⁇ .
• the control device 4 counteracts scaffolding settings of the reversing stand 1.
• step Sl takes place at a time at which the beginning of rolling stock 11 has not yet reached the reversing stand 1.
• the control device 4 is therefore able to carry out the following investigations:
• the control device 4 determined on the basis of the end position Pe and the traveling speed Vt ei ⁇ NEN time at which the Walzgrode scaffold 12 in the reversing 1 enters. Before this point in time, a discharge speed v A with which the rolling stock end 12 leaves the entry-side roller table regions 6 is equal to the transport speed vT. After this point in time, the discharge speed v A, with which the rolling stock end 12 runs out of the roller table areas 6 arranged on the outlet side, is determined by the quotient of transport speed vT and relative reduction ⁇ h.
• feeding speed and "Auslaufgeschwin ⁇ speed” thus designate in the present invention, the speeds at which the rolled stock 11 enters the roller portions 6 or the Walzgrode 12 from leaking out of the roller table areas. 6 So you will otherwise used as üb ⁇ Lich.
• the relative reduction ⁇ h can be determined explicitly by the framework parameters. However, it is also possible for the control device 4 to ascertain the relative decrease in diameter ⁇ h on the basis of the framework settings themselves.
• control device 4 determines in
• Step S2 both for the inlet velocity vE and for the outlet velocity vA their temporal courses. It is therefore able to determine in advance, where the start of rolling stock 11 and the rolling stock end 12 are at any time t.
• step S3 the control means initially selects those of the roller table areas 6, the downstream adjacent UNMIT ⁇ telbar to the reversing stand. 1 So it selects the roller table area 6, in which the rolling stock 5 after rolling through the reversing stand 1 first enters.
• step S4 it makes the necessary adjustments to a rotational speed vU of the transport rollers 7 of the selected one Roller table area 6 before. Step S4 will be explained in detail in connection with FIG.
• step S5 the control device 4 then checks whether it has already carried out the step S4 for all the run-out areas 6 arranged downstream of the outlet side. If this is not the case, the control device 4 selects the next exit-side roller table area 6 in a step S6 and returns to step S4.
• control device 4 performs a procedure corresponding to the steps S3 to S6 with respect to the roller table areas 6 arranged on the inlet side. Again, the step S8 in connection with FIG 4 will be explained in more detail.
• a step Sil the control device 4 checks whether the transport of the rolling material 5 is completed, the respective Trans ⁇ port operation is thus completed. If this is not the case, the control device 4 returns to step S3. Otherwise, the control device 4 checks in a step S12 whether all transport operations (in particular all rolling passes to be executed) have already been carried out. If this is not the case, the control device 4 returns to step S1. Check if the operating method according to the invention been ⁇ det.
• FIG 3 is CON ⁇ er worn 4 in accordance preferably as follows:
• step S21 determines in a step S21, on the basis of at ⁇ catching position PA and the inlet velocity profile fs (t) a run-time TE for the selected roller table area 6. Furthermore, it determines (also in the context of step S21) on the basis of the end position Pe and the Auslaufgeschwindig ⁇ keitsprofils vA (t) Flow time points TA and TA 'for the se lected ⁇ roller table area 6 as well as for the roller table area 6 which adjoins the selected roller table area 6 in the direction of the transport speed vT.
• the controller 4 determines a start time TS in a step S22.
• the starting time TS is preferably the formula
• TR is a time greater than zero. It has the meaning of a control reserve.
• vE (TE) is the entry speed vE at which the start of rolling stock 11 enters the selected roller table area 6 at the time of entry TE.
• vU (t) is the peripheral speed vU of the transport rollers 7 of the selected roller table area 6 at the instant t.
• a is a maximum acceleration of the Trans ⁇ portrollen 7 of the selected roller table. 6
• control device 4 calculates a lowering time TA "in a step S23.
• the lowering time TA" is preferably determined by the formula
• T ⁇ ' TA + k (T ⁇ -TA)
• k is a factor that is between zero and one. Preferably, it is close to zero, e.g. B. between 0, 0 and 0.2.
• a step S24 the control device 4 checks whether the current time t has already exceeded the starting time TS. If this is not the case, the control device 4 carries out a reaction in a step S25, which may be arbitrary in the context of the present invention.
• the control device 4 further checks in a step S26 whether the intake time TE has already been exceeded, that is, the rolling stock 5 has already reached the selected roller gangway area 6. If not, controls the control device 4 in a step S27 to the transport rollers 7 such that their peripheral speed VU is at the inlet speed VE at the inlet time TE nahä ⁇ hert.
• this matching in step S27 is preferably performed with the maximum acceleration a legal slightest ⁇ tet is, that the circumferential speed vU is thus aligned the transport rollers 7 in time later than the inlet timing TE, the feeding speed vE.
• the time reserve TR remains as a control reserve to compensate for any unforeseen changes in the intake velocity vE. Due to the individual determination of the start time TS and the individual Einlaufgeschwindig ⁇ speed vE at this time TS is also the acceleration ⁇ n Trentsverlauf, with which the adjustment of the peripheral speed vU, individually for the respective roller table ⁇ area. 6
• the control device 4 checks whether the lowering time TA "has already been reached in a step S28 If this is not the case, the control device 4 holds the peripheral speed vU of the transport rollers 7 of the selected roller table area 6 on the at the time t given Einlaufgeschwindig ⁇ ness vE. Otherwise, lowers them, in a step S30, the circumferential speed of the transport rollers 7 vU from the selected roller table area 6.
• step S29 the comparison speed for the order ⁇ peripheral speed vU the feeding speed vE, in step S30, the delivery speed vA.
• the exit speed vA "the rolling stock 5 after the descent timing TA is already constantly rolled fully ⁇ . Both the rolled stock 11 and the Walzpositionde 12 are therefore located downstream of the reversibility siergerüsts 1. For this reason," equal to the feeding speed vE .
• step S31 is performed in which the peripheral speed vU held at the outlet velocity vA becomes.
• step S27 is only apparent. Because due to the fact that within the framework of FIG. 4 the selected roller table region 6 is on the inlet side, when the rolled material start 11 enters the selected roller table region 6, the inlet speed vE is equal to the outlet speed. VA.
• both the adaptation of the peripheral speed vU to the entry speed vE and the lowering of the peripheral speed vU are carried out below the exit speed vA for the transport rollers 7 of all roller table areas 6, that is, both on the inlet side and outlet side.
• step S21 Regardless of whether the operating method according to the invention is carried out only on the outlet side or inlet side, it is also possible to make only the approximation of the peripheral speed vU to the inlet speed vE, but not the lowering of the peripheral speed vU after the ⁇ running time point TA according to the invention.
• the steps S23, S28 and S30 can ent ⁇ fall in Figures 3 and 4. In this case, it is therefore always proceeded directly from step S26 to step S29.
• steps S41 to S46 are inserted between steps S2 and S3 of FIG.
• step S41 the control device 4 - analogous to step S3 of FIG 2 - selects the roller table area 6, which is the outlet side of the reversing stand 1 closest.
• step S42 the controller 4 determines a Transport ⁇ .delta.t duration.
• the transport duration ⁇ t corresponds to the time span which elapses from the beginning of the transporting of the rolling stock 5 to the entry time point TE of the rolling stock start 11 into the selected roller table area 6.
• step S43 the controller 4 determines according to the formula
• TM TR + ⁇ vE (TE) -vU (t) ⁇ Ia
• step S44 the control device 4 checks whether the trans ⁇ port duration ⁇ t exceeds the minimum time TM. If this is not the case, the control device 4 in step S45 approaches the peripheral speed vU of the transport rollers 7 of the selected roller table area 6 to the entry speed vE. Otherwise, it begins in step S46 with the Trans ⁇ port of the rolling stock. 5
• Roll stand 1 next roller table area 6 delayed. It would theoretically but of course also possible to carry out the steps S41 to S46 for the other outlet side roller table areas 6. As a rule, however, the procedure according to FIG. 5 is sufficient.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Control Of Metal Rolling (AREA)
• Attitude Control For Articles On Conveyors (AREA)
• Metal Rolling (AREA)
• Soil Working Implements (AREA)
• Control Of Conveyors (AREA)

Priority Applications (5)

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Family Applications (1)

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Citations (4)

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• 2006
  • 2006-03-15 DE DE102006011937A patent/DE102006011937A1/de not_active Withdrawn
• 2007
  • 2007-02-02 EP EP07726284A patent/EP1993750B1/de active Active
  • 2007-02-02 RU RU2008140734/02A patent/RU2426614C2/ru not_active IP Right Cessation
  • 2007-02-02 PL PL07726284T patent/PL1993750T3/pl unknown
  • 2007-02-02 CN CN2007800089009A patent/CN101400458B/zh active Active
  • 2007-02-02 UA UAA200811183A patent/UA96287C2/ru unknown
  • 2007-02-02 WO PCT/EP2007/051007 patent/WO2007104609A1/de not_active Ceased
  • 2007-02-02 DE DE502007005841T patent/DE502007005841D1/de active Active
  • 2007-02-02 AT AT07726284T patent/ATE490034T1/de active
  • 2007-03-13 TW TW096108489A patent/TWI371320B/zh not_active IP Right Cessation

Patent Citations (4)

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