SE201725C1

SE201725C1 -

Info

Publication number: SE201725C1
Authority: SE
Publication date: 1965-01-01

Description

Uppfinnare: E Golde och M Ulfers Priorttet begfird frein den 23 mars 1961 (F6rbundsrepubliken Tyskland) Genom den fisterrikiska patentskriften 208 965 ãr det Hut, att for berakningen av bromskommandotidpunkten anvanda en rakneapparat, som beraknar bromsstrackan i forhallande till den vid varje tillfalle foreliggande valsningshastigheten. Andamalet med denna rakneapparat och den automatiskt arbetande styranordningen var att utnyttj a valsningsarbetet for bromsning av valsarna och dessas drivanordningar for att spara elektrisk energi och tid. En rakneapparat är emellertid helt naturligt icke utan vidare oversladlig med avseende pa sitt verkningssatt och speciellt aro installningsarbetena tidsodande. Foreliggande uppfinning har till syfte att astadkomma en enklare styranordning, vilken samtidigt som den ger atminstone i det narmaste sanuna resultat aven arbetar sarskilt storningsfritt. Inventor: E Golde and M Ulfers Priorttet befrin 23 March 1961 (Federal Republic of Germany) By the Fisterrian patent specification 208 965 it is Hut, to use a razor for the calculation of the time of the brake command, which calculates the braking distance in relation to the circumstances of each case. The purpose of this shaver and the automatic operating control device was to use the rolling work to brake the rollers and their drive devices to save electrical energy and time. However, a razor is quite naturally not simply superfluous with regard to its mode of operation and especially the installation work is time consuming. The present invention has for its object to provide a simpler control device, which at the same time as giving at least the nearest uniform result also operates in a particularly fault-free manner.

Uppfinningen avser salunda ett fOrfaring.ssatt for automatisk, under utnyttjande av valsningsarbetet skeende bromsning av till varvtalet reglerade drivanordningar for reverservalsverk. Enligt uppfinningen verksamgoras vid for uppnaende av varvtalsbOrvardet i bromsdrift pa forhand skeende givning av varvtalsminskningens storlek i tiden, ntlosningsmedel i och fOr minskning av varvtalet, di den mot kvadraten pa det vid varje tillfälle forhandenvarande varvtalet svarande, med utgangspunkt frau valsgodsets andldge raknade bromsstrackan ungeffir har nfitts, varvid utlosningsmedel tillika med tillordnade fasta varvtalsstyrstorheter aro uppdelade i steg i motsvarighet till den mot varvtalets kvadrat proportionella bromsstrackan, varvid Over troskelvardesbildande kopplingsmedel, speciellt ffirspanda likriktare, endast den vid varje tillfälle under det just verksamma varvtalsborvardet liggande styrstorheten gores verksam, vars tillordnade utlOsningsmedel passe-rats av den bakre valsgodsanden. Lampligen fir varvtalsborvardets minskning i tiden med avseende pa utlosningsmedel och varvtalsstyrstorheter installd i motsvarighet till den stewsta efterslapning hos valsgodset gentemot valsarna, som kan vantas. The invention thus relates to an experience set for automatic braking of drive devices for reversing rolling mills, which takes place during the utilization of the rolling work. According to the invention, in the event of obtaining the speed bar in braking operation, prior action is given of the magnitude of the speed reduction in time, release agent in and for reduction of the speed, in which the square corresponding to the square at each occasion, nfitts, whereby trigger means as well as assigned fixed speed control quantities are divided in steps corresponding to the braking distance proportional to the square of the speed, whereby over threshold-forming coupling means, especially four-dimensional rectifiers, only the at each time passed by the rear roll sand. It is appropriate for the speed drilling speed to decrease over time with respect to release means and speed control quantities installed in correspondence with the steepest lag of the rolling stock relative to the rollers that can be expected.

Den fortsatta beskrivningen skall goras i anslutning till figurerna. The following description will be made in connection with the figures.

Fig. 1 visar en principiell bild av det ifragavarande valsverket, fig. 2 ett diagram med den varvtalet tillordnade bromsstrackan och fick. 3 en kopplingsanordning for genomforandet av fOrfaringssattet enligt uppfinningen I fig. 1 bearbetas valsgodset mellan valsarna 2 och 3 i ett reverservalsverk. Sasom utlOsningsmedel fOr en fOrandring av varvtalsborvardet resp. for den i forvag skeende givningen av nya varvtalsstyrstorheter skola de fotoelektriska valsbanan 8vervakande kontakterna 4 ... 9 tjana. Lampligen kan man har satta in for rott ljus kansliga resp. genom varnaestralning initierade fotoceller. I fig. 1 har det visats, hur den bakre valsgodsanden just passerar utlosningsmedlet 5. Fig. 1 shows a basic view of the rolling mill in question, Fig. 2 is a diagram with the speed assigned to the braking distance and received. Fig. 3 shows a coupling device for carrying out the method set according to the invention. In Fig. 1 the rolling stock between the rolls 2 and 3 is processed in a reverse rolling mill. As a trigger for a change in the speed drill value resp. for the anticipated provision of new speed control variables, the photoelectric roller path 8 monitoring monitors 4 ... 9 will serve. Lampligen may have been inserted for red light chancel resp. photocells initiated by warning radiation. In Fig. 1 it has been shown how the rear rolling stock sand just passes the release means 5.

Over en tillhOrande styrning a.stadkommes nu minskningen av varvtalsborvardet for valsarnas 2 och 3 drivanordningar, sâ att en bromsning av valsgodset 1 sker. Vid passerandet av utlosningsmedlet 6 forhandsgives dâ en annu lagre varvtalsstyrstorhet. I och for sig 2201 7 skulle redan. vid det ovan i princip angivna forfaringssattet utlosningsmedlet 5 resp. utlosningsmedlet 4 ha varit tillfyllest. Emellertid uppnas pa detta Olt en storre driftsakerhet, on" ett av utb5sningsmedlen icke skulle trada i funktion. Samtidigt beaktas i motsvarighet till den fOrut kanda anordningen. genom ett mangfaldigt faststallande av den bromsstracka, som annu skall tillryggalaggas, battre den genom den. i och for sig okanda efterslapningsfaktorn uppkommande bristande noggrannheten. Over an associated control, the reduction of the rotational bore value of the drive devices of the rollers 2 and 3 is now achieved, so that a braking of the rolling stock 1 takes place. When passing the trigger means 6, an annuated stored speed control variable is then given in advance. In and of itself 2201 7 would already. in the above-stated procedure the trigger 5 resp. the trigger 4 has been most complete. However, a greater degree of operational reliability is achieved in this way, one of the means of ejection would not come into operation. for itself unknown lagging factor emerging lack of accuracy.

Pa motsvarande satt tjana utlOsningsmedlen 9, 8 och 7 for bromsning av valsdrivanordningarna vid drift i motsatt riktning. Correspondingly, the release means 9, 8 and 7 serve to brake the roller drive devices when operating in the opposite direction.

I fig. 2 har askadliggj arts, har bromsstrackan s ãr kvadratiskt tillordnad varvtalet n. De tre pa kurvan inritade punkterna ange utlosningsmedlens igangsattning. Sasom idealfall har till att bdrja med antagits, att valsdrivanordningarnas varvtalsminskning i tiden har installts i motsvarighet till en bestamd och kand efterslapning hos valsgodset gentemot valsarna. In Fig. 2, when the braking distance is so squarely assigned to the speed n. As an ideal case, it has been assumed to begin with that the speed reduction of the roller drive devices over time has been installed in correspondence with a definite and known lag of the rolling stock relative to the rollers.

Utlosningsrnedlen 4 och 9 aro nu anordnade I motsvarighet till det hogsta driftsvarvtal som kan. vantas. Var driftsvarvtalet lagre och exempelvis faststallt till vardet n' (jam-f or den streckade karakteristikan), sa gives pa fdrhand vid passerandet av utlosningsmedlet 4 resp. 9 sasom varvtalsstyrstorhet ett varvtal nz, som motsvarar bromsstrackan vid passerandet av utIiisningsmedlet 5 resp. 8. Darfor intraffar det inritade nvbrottet i bromsforloppet. I anslutning dartill forlOper bromsfdrloppet teoretiskt utan steg, varvid forst vid passerandet av utlosningsmedlet 5 resp. 8 sasom varvtalsstyrstorhet pa f8rhand gives varvtalet 111, och darefter vid passerandet av utlosningsmedlet 6, resp. 7 en varvtalsstyrstorhet ph praktiskt taget noll. Ett avbrytande av bromsforloppet vid varvtalet n' kan undvikas, oin varvtalsminskningen i tiden ar installd pa sa.- dant satt, att den ãr vald i motsvarighet till den storsta mojliga efterslapningen hos valsgodset gentemot valsarna. Da kommer visserligen vid mindre efterslapning valsgodset fortfarande att lamna valsstolparet med en. mindre hastighet. Detta efterstravas emellertid i regel redan av driftssakerhetsskal och for att kunna paverka valsinstallningen. The release means 4 and 9 are now arranged in correspondence with the highest operating speed that can. vantas. If the operating speed is lower and, for example, set to the value n '(for the dashed characteristic), then it is given in advance when passing the trigger 4 resp. 9 as speed control variable a speed nz, which corresponds to the braking distance when passing the release means 5 resp. 8. Therefore, the drawn nv break occurs in the braking process. In connection therewith, the braking process proceeds theoretically without steps, whereby only when passing the release means 5 resp. 8 as the speed control variable is given in advance, the speed 111, and thereafter when passing the trigger 6, resp. 7 a speed control variable ph practically zero. An interruption of the braking process at speed n 'can be avoided, without the speed reduction over time being set in such a way that it is selected in correspondence with the largest possible lag of the rolling stock relative to the rollers. Then, of course, in the event of minor lag, the rolling stock will still leave the roller post with one. less speed. However, this is usually already pursued by operational safety shells and to be able to influence the roll installation.

Ytterligare kopplingstekniska detaljer visas I fig. 3. En vasentlig bestandsdel är en anordning for pa forhand skeende givning av börvãrdet enligt den tyska Auslegeschrift 1 0,79 163. I denna kanda anordning upp-, uroch omladdas kondensatorn 12, vid vilken varvtalsborvardet uttages, fOr alstrande av ett definierat, tidsberoende och speciellt tidslin- jOrtmed en konstant strOna, som inmatas Over den som kontaktlos omkopplare verkande likriktarbryggan 16. En kondensatorstrom skall alltid flyta, ndr spanningen vid kondensatorn 12 icke overensstammer med spanningen vid den foretradesvis for hand installbara styrstorhetsgivaren 11. Spanningen hos kondensatorn 12 som bkvarde är sasom arvarde motkopplad en takometermaskins 13 ankarspanning. Den pa detta satt Mldade varvtalsregleringsavvikelsen tillfOres Over klammorna 14 och 15 en icke dskadliggj ord regleringsfOrstarkare. Takometermaskinen 13 kopplas lampligen med valsarnas drivanordning. Further switching technical details are shown in Fig. 3. An essential component is a device for giving the setpoint according to the German Auslegeschrift 1 0.79 163 in advance. generating a defined, time-dependent and special timeline with a constant current, which is fed over the rectifier bridge 16 acting as a contactless switch. The voltage of the capacitor 12 which remains is, as it were, connected to the armature voltage of a tachometer machine 13. The measured speed deviation deviated from this is applied via clamps 14 and 15 to a non-harmful word control amplifier. The tachometer machine 13 is suitably coupled to the drive device of the rollers.

Till den ma langt kanda kopplingsanordningen är parallellt ,med styrstorhetsgivaren 11 en brygglikriktare 17 ansluten, Over vilken fdr styrningen av valsdrivanordningens bromsning lagre styrstorheter inmatas. Dessa styrstorheter alstras med hjalp av spanningskallan 18 och spanningsdelarmotstdnden 19 till 21. En inkopplingskontakt for bromsningsautomatiken ar betecknad Hied a under det att omkopplaren 23 i motsvarighet till vid varje tillfaIle foreliggande vridningsriktning hos valsdrivanordningen och darmed has valsarna astadkommer tillkopplingen av styrstorheter av den ena eller den andra polariteten. Utlosningsmedlen 4 ... 9 i fig. 1 ha tillordnats kontakterna 24 ... 29. Om exempelvis valsgodset passerar utlosningsmedlet 4, slutes kontakten 24; orn valsgodset passerar utlosningsmedlet 5, slutes kontakten 25 osv. For blockering av utjamningsstrommar mellan de enskilda styrstorheterna tjana torrlikriktarna 34 ... 39. A bridge rectifier 17 is connected in parallel to the well-known coupling device, with the control quantity sensor 11, over which control quantities are entered before the control of the braking of the roller drive device. These control quantities are generated by means of the tension head 18 and the voltage divider resistor 19 to 21. A switch-on contact for the automatic braking is designated Hied a while the switch 23 corresponds to the direction of rotation of the control drive device second polarity. The release means 4 ... 9 in Fig. 1 have been assigned to the contacts 24 ... 29. If, for example, the rolling stock passes the release means 4, the contact 24 is closed; orn the rolling stock passes the trigger 5, the contact 25 is closed, and so on. For blocking equalizing currents between the individual control quantities, the dry rectifiers 34 ... 39 are used.

Forsavitt exempelvis den av kontakten 24 inkopplade styrstorheten, som uttages vid motstandet 19, ligger under spanningen vid kondensatorn 12, kan fran kondensatorn 12 flyta en urladdningsstrom Over likriktarbryggan 17, torrlikriktaren 34, Over den lagohmigt dimensionerade spanningskallan 18 i forbindelse med det lagolimiga motstandet 19, tillbaka till likriktarbryggan 17 och darifran vi-dare Over likriktarbryggan 16 tillbaka till kondensatorn 12. Pa grund av den vid bryggans 16 likstromsklammor inmatade konstantstrommen forblir aven kondensatorns 12 urladdningsstrom konstant. Med hjalp av likriktarbryggan 40, som aven ãr fkgenomfluten av en konstant strOm, forhindras, att en otillatet hog utjamningsstrom kan flyta frAn styrstorhetsgivaren 11 till likriktarbryggan 17. Bromsstrackans kvadratiska beroende av varvtalet kan beaktas genom lamplig installning av uttagen vid spanningsdelarmotstanden 19 ... 21 eller genom lamplig anordning av utlOsningsmedlen 4 ... 9 eller genom kombination av nyssnamnda hada atgarder. For example, if the control quantity connected by the contact 24, which is taken out at the resistor 19, is below the voltage at the capacitor 12, a discharge current can flow from the capacitor 12 over the rectifier bridge 17, the dry rectifier 34, back to the rectifier bridge 17 and thence further Over the rectifier bridge 16 back to the capacitor 12. Due to the constant current fed in at the DC terminals of the bridge 16, the discharge current of the capacitor 12 also remains constant. With the aid of the rectifier bridge 40, which is also flowed by a constant current, an unauthorized high equalizing current can be prevented from flowing from the control quantity sensor 11 to the rectifier bridge 17. The square dependence of the braking distance can be taken into account or by appropriate arrangement of the trigger means 4 ... 9 or by combination of the aforesaid had actions.

Tack vare den beskrivna kopplingsanord- 201 73 ningen blir det mOjligt, att styrstorhetsgivaren 11 speciellt manuellt vid varje tillfalle kan ryckartat fOrflyttas till det ena eller andra andlaget, utan att hastigheten hos omstallningen har en verkan pa styrningens forlopp. Speciellt vid bromsrting forlorar styrstorhetsgivaren 11, som i allmanhet âr kopplad med en manOverhavarm, sin verkan. Valsgodset kommer efter slutford bromsning att ligga omedelbart bakom valsspalten. Thanks to the described coupling device, it becomes possible that the control quantity sensor 11, especially in each case, can be jerkily moved to one or the other unit, without the speed of the conversion having an effect on the course of the control. Especially with braking, the control variable sensor 11, which is generally connected to a maneuvering arm, loses its effect. After final braking, the rolling stock will be immediately behind the roller gap.

I stallet for utlbsningsmedlen 5 till 9 kunna tva fotoelektriska langdmatningsapparater komma till anvandning, av vilka vid varje till-Mlle en apparat ãr anordnad pa den ena sidan av valsstolparet. Kanda apparater, som arbeta med roterande vridspeglar, kunna anvandas for faststallande av laget hos den bakre valsgodsanden (jfr tysk Auslegeschrift 1 092 541). Instead of the discharge means 5 to 9, two photoelectric longitudinal feeders can be used, of which in each case an apparatus is arranged on one side of the roller post. Kanda devices, which work with rotating rotating mirrors, can be used for fixing the layer of the rear rolling stock sand (cf. German Auslegeschrift 1,092,541).

I detta fall kan utan namnvard merforbrukning av kopplingsmedel bromsningsfarloppet styras i godtyckligt sma steg. Detta tarde innebara, att for forhandsgivningen av varvtalsstyrstorheten konstruktionselementen 19 till 21, 24 till 29 och 34 till 39 kunna ersattas med an i stor utstrackning kontinuerligt foranderlig spanning. Ett bestamt lage hos den bakre valsgodsanden har darvid tillordnats en bestamd spanning, dvs. varvtalsstyrstorhet, vilken lampligen alstras av lagesmatapparatens utgangsstorhet Over en funktionsgivare, sadan den är beskriven i fig. 3 i det osterrikiska patentet 208 965. Anordningen for forhandsgivning av biirvardet Over kondensatorn 12 (motsvarande den tyska Auslegeschrift 1 079 163) bor emellertid bibehallas far att eliminera stOrningar, som harrora frail andra stralningskallor an sjalva valsgodset. Kopplingsanordningen enligt fig. 3 kan naturligtvis aven helt och hallet anvandas i fortsattningen, nar bestamda utgangsstorheter hos lagesmatapparaten ha tillordnats relder, vilka vid varje tillfalle paverka en av kontakterna 24 till 29. In this case, without nominal value, additional consumption of coupling agent, the braking process can be controlled in arbitrarily small steps. This meant that for the preview of the speed control variable, the design elements 19 to 21, 24 to 29 and 34 to 39 could be replaced with a largely continuously changing voltage. A specific layer of the rear rolling stock sand has thereby been assigned a specific tension, ie. However, the speed control variable, which is suitably generated by the output variable of the storage device over a function sensor, as described in Fig. 3 of the Austrian patent 208 965. disturbances which radiate from other radiation sources other than the rolling stock itself. The coupling device according to Fig. 3 can of course also be used entirely in the hall in the continuation, when certain output quantities of the cooking food apparatus have been assigned to rails, which in each case affect one of the contacts 24 to 29.

Det oven beskrivna forfaringssattet i forbindelse med tillhorande kopplingsanordning är pa i princip samma satt anvandbart vid andra drivanordningar med liknande driftsbetingelser, speciellt verktygsmaskiner, sasom hyvelmaskiner el. dyl. Vidare kan istallet fOr drivanordningens viarvtal aven dess ankarspanning regleras. The procedure described above in connection with the associated coupling device is in principle the same way applicable to other drive devices with similar operating conditions, especially machine tools, such as planing machines or the like. dyl. Furthermore, instead of the drive speed of the drive device, its armature voltage can also be regulated.

Claims

Patent claim:

1. Experienced for automatic, while utilizing the rolling work, braking of drive devices for reverse rolling mills regulated to the speed, characterized by the fact that when achieving the speed bore in braking operation in advance giving the size of the speed reduction in time trigger and 1 (1 ... for reduction of the speed effective, then. the braking distance of the rolling stock (1) corresponding to the square of the existing speed, based on the surface of the rolling stock (1), has been roughly increased, whereby trigger means (4 ... 9) as well as assigned fixed speed control quantities, for example voltage divider resistance, (at 19. .. 21) aro stepped in corresponding to the braking distance (s) proportional to the square (n) square and that Over triiskelvardes forming clutches, especially bias rectifiers, (17 and 34 ... 39) only that in each case during the current operating torque the horizontal guide rigidity is activated, the assigned trigger means (4 ... 9) being passed by the rear rolling pin.

Procedure according to claim 1, characterized in that the reduction of the speed drill speed over time is set with the aid of lifting means (4 ... 9) and speed control quantities (19 ... 21) corresponding to the largest lag of the rolling stock (1) relative to the rollers (2, 3), which can be used.

3. A coupling device for carrying out the procedure according to any one of the preceding patent claims, characterized in that a predetermined determination of the speed reduction over time is a per se known device Si 'Forhand, in which a capacitor (12), at which the drill bit is taken out Over a coupling device (126) is charged, discharged and reloaded with a constant current, and that in parallel with a preferably manually adjustable control variable sensor (11) a bridge rectifier (17) is connected, to whose DC voltage clearance mother of the tripping means (4 ... 9) are connected speed control quantities (at 19 ... 21), suitably formed by voltage heads (18 in connection with 19 ... 21) with insignificant internal resistance, () eh that between control quantity sensors (11) and bridge rectifiers (17) Sr connected a rectifier device (40) pre-flowed in both current directions of current (Fig. 3). Request publications: