SU869884A1

SU869884A1 - Rolling stand screwdomn apparatus

Info

Publication number: SU869884A1
Application number: SU802871084A
Authority: SU
Inventors: Александр Иванович Куцаков; Борис Александрович Серман; Федор Терентьевич Виноградов; Владимир Петрович Бедняков; Евгений Аркадьевич Фридман; Леонид Соломонович Зельдович; Валентин Алексеевич Ивоботенко; Виктор Федорович Клестов; Вадим Яковлевич Тонконогов
Original assignee: Предприятие П/Я В-2869
Priority date: 1980-01-18
Filing date: 1980-01-18
Publication date: 1981-10-07

Description

Изобретение относится к области обработки металлов давлением, а точнее к нажимным устройствам прокатных клетей с регулируемым зазором между валками.The invention relates to the field of metal forming, and more specifically to pressure devices rolling stands with an adjustable gap between the rollers.

Изобретение наиболее эффективно) может быть'использовано в трубопрокатных агрегатах е многоклетьевым непрерывным станом, работающим на длинных оправках, и редукционно-растяжным ста?^ ном, особенностью которых является образование утолщения стенки трубы на переднем и заднем ее концах.The invention is most effective) can be used in tube-rolling units with a multi-strand continuous mill operating on long mandrels and a reduction-stretching mill, whose feature is the formation of a thickening of the pipe wall at its front and rear ends.

Известно нажимное устройство про·?,. кагной клети, включающее механизм прё,·. дварительной установки раствора валг' ков с. нажимным винтом и гайкой,_рмеханизм тонкой регулировки раствора вал* ков в виде гидроцилиндра, монтированного на подушке верхнего валка, поршень которого посредством. · сферического подпятника сопрягается с торцом нажимного винта ГЯKnown pressure device about · ?,. kagnoy stand, including the mechanism prё ·. two-way installation of a solution of wall pressure screw and nut, _p mechanism for fine adjustment of the shaft * solution in the form of a hydraulic cylinder mounted on the cushion of the upper roll, the piston of which is by. · Spherical thrust bearing mates with the end of the pressure screw ГЯ

Недостаток известного техническог, го решения заключается в том, что .подвод жидкости к гидроцилиндру выполнен посредством гибкого соединения, что вызывает необходимость разборки опорного подпятника при каждой перевалке клети и снижает надежность работы клети в целом.A disadvantage of the known technical solution is that the liquid is supplied to the hydraulic cylinder by means of a flexible connection, which makes it necessary to disassemble the support bearing plate at each transshipment of the stand and reduces the reliability of the stand as a whole.

Известно нажимное устройство прокатной клети, содержащее механизм предварительной установки раствора валков в виде электромеханического привода с нажимным винтом и гайкой, и' гидроцилиндр тонкой регулировки раствора валков, закрепленный нц станине, в поршне которого выполнена полость с резьбой для перемещения нажимного винта Г2] .It is known that a rolling stand press device comprises a mechanism for pre-setting the roll solution in the form of an electromechanical drive with a press screw and nut, and a fine adjustment cylinder for the roll solution fixed to the bed frame, in the piston of which a cavity with a thread is made to move the compression screw G2].

Недостатками данного решения являются расположение редуктора привода нажимных винтов в .зоне воздействия высоких температур, невозможность его защиты от воды и окалины, что снижает надежность работы устройства, з 869884 при этом отсутствует возможность раздельной регулировки положения нажимных винтов, чем обуславливается неизбежный перекос элементов зубчатого зацепления. ₅ The disadvantages of this solution are the location of the pressure screw drive gearbox in the zone of high temperatures, the inability to protect it from water and scale, which reduces the reliability of the device, since 869884 there is no possibility of separate adjustment of the position of the pressure screws, which leads to the inevitable misalignment of gear elements. ₅

Наиболее близким по технической сущности к описываемому является нажимное устройство, содержащее механизм предварительной установки.раствора валков в виде электромеханического привода с нажимным винтом и гайкой, монтированный на станине клети, механизм тонкой регулировки раствора с аоставе гидроцилиндра, монтированного между торцом нажим- 55 ного винта и подушкой верхнего валка, задатчика, телескопа и следящего золотника ГЗ] .The closest in technical essence to the described is a pressure device containing a preset mechanism. The roll solution is in the form of an electromechanical drive with a pressure screw and nut mounted on a stand bed, a fine adjustment mechanism of the solution with the part of the hydraulic cylinder mounted between the end of the pressure screw 55 and cushion of the upper roll, setter, telescope and follow-up spool GB].

Недостаток известного технического решения заключается в том, что вэа- ₂₀имное центрирование размещенного в полости нажимного винта поршня гид равлического цилиндра, его штока, телескопического соединения и плунжера золотника, корпус которого цент¹- ₂₅.рируется по расточке станины, с дос—i таточной степенью точности затруднено. Поэтому при работе клети неизбежны заклинивания, перекосы и ускоренная выработка элементов гидравлической ₃₀системы, что делает конструкцию ненадежной в работе.A disadvantage of the known technical solutions lies in the fact that the centering imnoe vea- ₂₀ disposed in the cavity of the pressure screw piston guide ravlicheskogo cylinder, its rod, the telescopic connection and the plunger slide valve, which housing ¹ cent - ₂₅ .riruetsya bore of the frame, with dos-i tatochnoy the degree of accuracy is difficult. Therefore, jamming, skewing and accelerated production of hydraulic system elements _{30 are} inevitable during cage operation, which makes the structure unreliable in operation.

Цель изобретения - повышение надежности работы путем уменьшения перекосов и износа элементов механиз„ 35 ма тонкой регулировки.The purpose of the invention is to increase the reliability by reducing distortions and wear of the elements of the mechanism of "35 ma fine adjustment.

Это достигается тем, что устройство, содержащее механизм предвари-, тельной установки раствора валков в виде электромеханического привода с ⁴⁰нажимным винтом и гайкой, монтированный на станине клети; механизм тонкой регулировки раствора валков в составе гидроцилиндра, монтированного между торцом нажимного винта и ⁴⁵подушкой верхнего валка, задатчика, телескопа и следящего золотника, снабжено установленной в вертикальном пазу станины по оси прокатной клети с возможностью возвратнЬ-посту- 50 пательного перемещения управляющей линейкой, жестко связанной-с корпусом гидроцилиндра механизма тонкой регулировки и уравновешенной относительно станины, при этом на упомя-55 нутой линейке монтированы телескоп и следящий золотник, а задатчик уста' новлен на элементе нажимного винта и снабжен коромыслом, взаимодействующим со следящим золотником.This is achieved by the fact that the device containing the mechanism for the preliminary installation of the roll solution in the form of an electromechanical drive with ⁴⁰ pressure screw and nut mounted on the stand frame; the fine adjustment mechanism in the roll gap part of the hydraulic cylinder, between the mounted end face of the pressure screw ⁴⁵ and the cushion upper roll, set point, the telescope and the servo valve is provided with a groove installed in the vertical frame axially with the roll stand to reciprocate postu--50's translational movement of the control line rigidly connected with the body of the hydraulic cylinder of the fine adjustment mechanism and balanced relative to the bed, while the telescope and the tracking spool are mounted on the mentioned line, and the adjuster It is renewed on an element of a compression screw and is equipped with a beam interacting with a follower valve.

На фиг. 1 показан общий вид устройства, установленного на прокатной клети; на фиг. 2 - разрез А-А на фиг. 1; на фиг. 3 - вид Б на фиг. 2' на фиг. 4 - разрез В-В на фиг. 3. ,In FIG. 1 shows a general view of a device mounted on a rolling stand; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 is a view B in FIG. 2 ′ in FIG. 4 is a section BB of FIG. 3.,

Основное устройство установлено в прокатной клети, которая состоит из станины 1, узла валков 2, механизма предварительной установки валков, который включает нижний нажимной механизм 3 и верхний нажимной механизм 4, механизм тонкой регулировки валков 5, охваченного обратной связью по перемещению, механизма осевой регулировки 6.The main device is installed in a rolling stand, which consists of a bed 1, a roll assembly 2, a roll pre-setting mechanism, which includes a lower pressure mechanism 3 and an upper pressure mechanism 4, a fine adjustment mechanism for the rolls 5, covered by movement feedback, an axial adjustment mechanism 6 .

Механизм тонкой регулировки валков 5 включает управляющую линейку 7, жестко закрепленные на ней телескоп 8, следящий золотник 9, гидроцилиндр 10, трубопроводы 11 и панели 12.The mechanism of fine adjustment of the rolls 5 includes a control line 7, a telescope 8, a tracking spool 9, a hydraulic cylinder 10, pipelines 11 and panels 12, which are rigidly fixed on it.

На верхнем конце нажимного винта механизма 4 размещен элемент (траверса) 14, на которой закреплен задатчик,15, шарнирно связанный со Цедящим золотником 9 коромыслом 16,’ Линейка 7, расположенная в отверстии станины 1, уравновешена пружинами 17 посредством балки 18, установлена с возможностью возвратно-поступательного перемещения. Пружины 17 созг дают переуравновешивание с целью плотного прижима штока 19 гидроцилиндра 10 к нажимному винту 13 через сферический подпятник 20. Гидроцилиндр через сферический подпятник 21 связан с подушкой верхнего валка.An element (traverse) 14 is placed on the upper end of the pressure screw of the mechanism 4, on which the adjuster is fixed, 15 pivotally connected to the Casing spool 9 by the rocker 16, 'The ruler 7, located in the hole of the frame 1, is balanced by the springs 17 by means of the beam 18, is installed with the possibility reciprocating movement. The springs 17 give a rebalancing to tightly clamp the rod 19 of the hydraulic cylinder 10 to the pressure screw 13 through the spherical thrust bearing 20. The hydraulic cylinder through the spherical thrust bearing 21 is connected to the cushion of the upper roll.

Давление металла на верхний валок замкнуто системой вапок-подушка-под- . пятник-гидроцилиндр-нажимной вйнтнажимная гайка-станина.The pressure of the metal on the upper roll is closed by the vapok-pillow-under system. Friday-hydraulic-cylinder-screw-in-nut-bed.

Устройство работает следующий образом.The device operates as follows.

Узел валков 2 прокатной клети нажимными механизмами 3 и 4 устанавливав ют на нужную величину обжатия прокатываемого профиля. В процессе прокатки от установки измерителя толщины или от другого источника энергии (на фи гурах условно не показаны) поступает сигнал на задатчик 15, который, преобразуя вращательное движение в поступательное, воздействует на коромысло 16 , а то , в свою очередь, воздействует на плунжер 22 следящего золотника 9. Плунжер 22, перемещаясь в корпусе золотника 9 вниз, увеличивает дросселирующую щель и жидкость под давлением поступает от телеокбпа 8 через следящий золотник 9 в полость гидроцилиндра 10, воздействуя на шток 19.с, Так как шток 19 находится в пЬстоянном контакте со сферическим подпятником 20, а подпятник - с нажимным винтом 13, то под действием нагнетаемой жидкости корпус гидроцилиндра 10 перемещается вниз, вынуждая перемещаться верхний валок с пор душками, увеличивая величину обжатия прокатываемого металла,The roll unit 2 of the rolling stand is pressed by pressing mechanisms 3 and 4 to the desired compression ratio of the rolled profile. In the process of rolling from the installation of the thickness gauge or from another energy source (not shown conventionally in fixtures), a signal is sent to the adjuster 15, which, converting the rotational motion to the translational, acts on the rocker 16, and, in turn, acts on the plunger 22 the follower valve 9. The plunger 22, moving downward in the valve body 9, increases the throttling slot and pressurized fluid enters from the telecpb 8 through the follower valve 9 into the cavity of the hydraulic cylinder 10, acting on the rod 19.c, since the rod 19 is located in If the contact with the spherical bearing 20 is constant, and the bearing with the compression screw 13, then under the action of the injected fluid, the cylinder body 10 moves downward, forcing the upper roll to move with the pores with dots, increasing the amount of compression of the rolled metal,

Одновременно, с перемещением корпуса гйдроцилиндра 10 вниз, перемещается и линейка 7 с закрепленными на ней золотником 9, корпус которого, следуя за собственным плунжером 22 на величину линейного перемещения, пре- , рывает подачу жидкости в гидроцилиндр 10 (обратная связь по перемещению),, удерживая его в заданном положении. По истечении необходимого времени, например, для утонения переднего или заднего конца прокатываемой трубкой: заготовки, задатчик 15, получив сигнал, возвращатеся в исходное положение. При этом плунжер 22 следящего золотника 9 под действием собственной ' пружины перемещается вверх и открывает щель для сброса давления в гидроцилиндре 10. Система уравновешивания упрвляющей линейки 7, под воздействием пружин 17 и балки 18 возвращает гид?*' равлический механизм тонкой регулировки 5 в исходное'положение, а верхг ний валок с подушками за счет собственного уравновешивания также занимает первоначальное положение и прокатка металла протекает в валках, удерживаемых нажимными механизмами 3 и 4.At the same time, with the housing of the hydraulic cylinder 10 moving down, the ruler 7 also moves with a spool 9 mounted on it, the housing of which, following its own plunger 22 by the amount of linear movement, interrupts the fluid supply to the hydraulic cylinder 10 (feedback on movement) ,, holding it in the set position. After the required time has elapsed, for example, to thin the front or rear end of the rolled tube: the workpiece, the setter 15, having received the signal, will return to its original position. At the same time, the plunger 22 of the follower spool 9, under the action of its own 'spring, moves upward and opens a slot for depressurizing the hydraulic cylinder 10. The balancing system of the control line 7 returns the guide? *' Fine adjustment mechanism 5 to the original 'under the influence of the springs 17 and beam 18 position, and the upper roll with pillows due to its own balancing also occupies its original position, and metal rolling proceeds in rolls held by pressure mechanisms 3 and 4.

Предложенное устройство исключает необходимость выполнения точной соосной линейки с нажимным винтом и задатчиком, что позволяет повысить надежность работы клети за счет исключения возможности заклинивания и' интенсивной выработки элементов 5 механизма точной настройки валков и сократить простои агрегата.The proposed device eliminates the need for an accurate coaxial ruler with a pressure screw and a setter, which improves the reliability of the stand by eliminating the possibility of jamming and intensive production of elements 5 of the mechanism for fine-tuning the rolls and reduce machine downtime.

Claims

The invention relates to the field of metal forming, more precisely to the pressure devices of the rolling stands with adjustable clearance m; between the rollers. The invention is most effective i can be used in pipe fittings with a multi-squared M4 M4 mill, working on long ones. mandrels, and a reduction-stretch statnet, a feature of which is the formation of a thickening of the pipe wall at its front and rear ends. The press device of the cage stand is known, which includes the mechanism that has set up a two-way installation of the valgov solution. A nasal screw and nut, a mechanism of nausea adjustment of the solution of rollers in the form of a hydraulic motor mounted on a pillow of the upper roll, the piston of which connects the spherical subframe to the end of the pressure screw. A disadvantage of the known technical solution is that the fluid supply to the hydraulic cylinder is made by means of a flexible connection. This makes it necessary to disassemble the support bushing at each transfer of the stand and reduces the reliability of the stand as a whole. A npocate stand pressure device is known, which contains a mechanism for presetting a roll solution in the form of an electromechanical drive with a pressure screw and a nut, and a hydraulic cylinder for fine adjustment of the roll solution fixed to a frame, in the piston of which there is a threaded cavity for moving the pressure screw G2. The disadvantages of this solution are the location of the pressure drive drive reducer in the zone of high temperatures, the impossibility of protecting it from water and scale, which reduces the reliability of the device. at the same time, there is no possibility of a different adjustment of the position of the pressure screws, which results in the inevitable bias of the gearing elements. The closest in technical essence to the described c is a pressure device containing a presetting mechanism. A roll thief in the form of an electromechanical drive with a pressure screw and a nut mounted on the stand frame, a fine adjustment mechanism of the solution with the composition of the hydraulic cylinder mounted between the end face. a screw and a cushion of the upper roll, setpoint adjuster, telescope, and the following slide valve. A disadvantage of the known technical solution is that the mutual centering of the hydraulic cylinder piston located in the cavity of the pressure screw, its rod, the forest connection and the spool plunger, the body of which is centroated along the bed bore, is difficult to achieve with a given degree of accuracy. seizure, misalignment and accelerated production of hydraulic system elements, which makes the design unreliable in operation. The purpose of the invention is to increase the reliability of operation by reducing the shifts and wear of the elements of the fine adjustment mechanism. This is achieved by the fact that a device containing a mechanism for presetting the roll solution in the form of an electromechanical drive with a mm screw and nut, mounted on the stand of the cage is a mechanism for finely adjusting the solution of vapks in the hydraulic cylinder mounted between the end of the pressure screw and the top roll cushion, setting device, the telescope and the follow spool, is provided with a rolling stand installed in the vertical groove of the frame along the axis of the rolling stand with the possibility of reciprocating the moving movement of the ruler, with a ruler a cylinder housing zannay.s fine adjustment mechanism and the balanced of relative frame, wherein at upo-mentioned range and the telescope mounted follower spool and dial Credited mouth member at the pressure screw is provided with a yoke cooperating with the follower spool. FIG. I shows a general view of the device installed on the rolling stand; in fig. 2 shows section A-A in FIG. one; in fig. 3 is a view B in FIG. 2; in fig. 4 shows a section B-B in FIG. 3. The Main Device is installed in the rolling stand, which consists of the bed 1, the roll assembly 2, the roll presetting mechanism, which includes the lower pressure mechanism 3 and the upper pressure mechanism 4, the mechanism of fine adjustment of the rolls 5 covered by the displacement feedback, mechanism of axial adjustment 6. The mechanism of fine adjustment of the rolls 5 includes: a control line 7, rigidly attached to it telescope 8, track w 1st spool 9, hydraulic cylinder 10, pipelines 11 and panels 12. At the upper end of the pressure screw 13 mechanics Zma 4 is placed the element (traverse) 14, on which the control device 15 is fixed, pivotally connected with the spool 9 of the rocker arm 16 ,; Line 7, located in the opening of the frame 1, is balanced by the springs 17 by means of the beam 18, installed with the possibility of reciprocating movement. Springs 17 cosg. give re-equilibration in order to tightly press the rod 19 of the hydraulic cylinder 10 to the pressure screw 13 through the spherical hub 20. The hydraulic cylinder 10 through the spherical hub 21 is connected with the upper roll cushion. The metal pressure on the upper roll is closed by the roll-cushion-under- system. ptnik-hydraulic cylinder-on-your screw screw-nut nut-bed. . The device works as follows. The roll unit 2 of the rolling stand with the help of mechanisms 3 and 4 is set to the required amount of compression of the profile being rolled. In the process of rolling out the installation, the thickness gauge from another energy source (figured conditionally shown) shows a signal to the setpoint 15, which, to reverse the rotational movement into a differential, affects the charge bearing 16 (a. In turn. Acts on the plunger 22 of the follower carter 9. Plunger 22, moving c1 {the valve body 9 downward, increases the throttling gap and the pressurized fluid flows from the teleocbpa 8 through the next valve valve 9 into the cavity of the hydraulic cylinder 10, affecting the rod 19. s, Since the rod 19 is in csc the contact with the spherical bolster 20, the apodice with the pressure screw 13, the body of the hydraulic cylinder 10 moves down under the action of the injected fluid, forcing the upper roller with pores to increase the amount of rolled metal rolling, Simultaneously with the movement of the hydraulic cylinder 10 down , the ruler 7 also moves with the spool 9 fixed on it, the casing of which, for its own plunger 22 by the amount of linear displacement, interrupts the flow of fluid into the hydraulic cylinder 10 (feedback on: displaced w) ,, retaining it in position. After the required time has elapsed, for example, to thin the front or rear end with a rolled tube: blanks, setpoint 15, having received a signal, return to the starting position. In this case, the plunger 22 of the follower valve 9 moves upward under the action of its own spring and opens a slit for pressure relief in the hydraulic cylinder 10. The balance system of the control ruler 7, under the influence of the springs 17 and the beam 18, returns the hydraulics of the fine adjustment 5 to the initial position, and Upper scientific research institute roll with cushions due to its own balancing of the grabbing is occupied: ... the initial position and rolling of the metal takes place in the rolls held by the pressing mechanisms 3 and 4. The proposed device eliminates neo divergence performing accurate coaxial line with the pressure Sh1ntom adatchikom and that allows the increase adezhnost rabotag stand due to possible jamming Exception intensive generation elements mechanisms still fine adjustment of the rolls and okratit machine downtime. Claims of the invention A rolling kLeti pressure device containing a mechanism for presetting the roll solution in the form of an electromechanical drive with a pressure screw and nut, MONTIRO. bathroom on the bed, cage; the mechanism for fine adjustment of the roll solution in the hydraulic cylinder mounted between the end of the pressure screw and the upper roll cushion, setting unit, telescope and follower / spool, characterized in that in order to increase the reliability of operation by reducing the distortions and wear of the fine adjustment mechanism elements, it is equipped Bi-installed vertical groove of the frame along the axis of the rolling stand with the possibility of reciprocating movement of the control ruler rigidly connected with the body of the hydraulic cylinder of the mechanism Adjusting and equilibrated with respect to the frame and the telescope follower anes spool mounted on said line, and snip zadatg mounted on the pressure screw element and is provided with a core, scrap, interacting with follower slide valve. Sources of information taken into account in the examination of the iG German Patent 2651490, cl. B 21 B 31/24, 1978.

2. The patent of Germany 2652325, cl. B 21 B 31/20, 1978.

3. USSR author's certificate number 208644, cl. B 21 B 37/00, 1965.

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