SU946750A1

SU946750A1 - Ring rolling mill

Info

Publication number: SU946750A1
Application number: SU802999005A
Authority: SU
Inventors: Григорий Абрамович Соболь; Натан Самуилович Файвышевский; Владимир Павлович Рудь; Николай Григорьевич Чуприна; Анатолий Ефимович Головаш
Original assignee: Киевское Отделение Украинского Государственного Проектного Института "Тяжпромэлектропроект"; Старо-Краматорский машиностроительный завод им.Орджоникидзе
Priority date: 1980-10-31
Filing date: 1980-10-31
Publication date: 1982-07-30

Description

(54) КОЛЬЦЕПРОКАТНЫП СТАН(54) RING MILL

Изобретение относитс к обработке металлов давлением и предназначено дл производства кольцевых изделий.The invention relates to the processing of metals by pressure and is intended for the production of ring products.

Известен кольцеобразный стан, содержащий приводной наружный , нажимной внутренний валок и отключающее устройство, состо щее из силового цилиндра со штоком, имеющим на конце ролик, установленный с возможностью контакта с прокатываемым кольцом 1 .Known ring-shaped mill containing a drive outer, push the inner roller and the shut-off device, consisting of a power cylinder with a rod having a roller at the end, installed with the possibility of contact with the rolled ring 1.

Недостаток указанного стана зак .лючаетс в разбросе размеров диаметра остывших прокатных колец, св занный с отклонени ми от расчетных температур как самого кольца, так и узлов кольцепрокатного стана в 1ломент окончани прокатки кольца.The disadvantage of this mill is in the variation in the size of the diameter of the cooled rolling rings, due to deviations from the calculated temperatures of both the ring itself and the ring-rolling mill assemblies by 1 minute of the end of the ring rolling.

Цель изобретени - повьиение точности размеров прокатных колец.The purpose of the invention is to increase the accuracy of rolling ring sizes.

Указанна цель достигаетс за счет того, что кольцепрокатный стан, содержащий приводной наружный валок, нажимной внутренний валок и отключающее устройство, состо щее из силойого цилиндра со штоком, имеюцим на конце ролик, установленный с возможностью контакта с прокатываег ым кольцом, он снаб7хен системой управлени отведением нажимного внутреннего валка, св занным с ней пирометром измерени температуры прокатываемого кольца и двум датчиками перемещений, св занныгот со схемой управлени и со штоком и размещенными один относительно другого, на рассто нии , равном диаметру прокатанного кольца, ролик установлен .с возможностью взаимодействи с наружным This goal is achieved due to the fact that the ring-rolling mill, containing a drive outer roll, a pressure inner roll and a deactivating device consisting of a strong cylinder with a rod, having a roller at the end, installed with the possibility of contact with the rolled ring, is equipped with a discharge control system a pressure internal roll, connected with it by a pyrometer for measuring the temperature of a rolled ring and two displacement sensors, associated with a control circuit and with a rod and placed one relative but another, at a distance equal to the diameter of the rolled ring, the roller is mounted with the ability to interact with the outer

10 валком, при этом система управлени отведением нажимного внутреннего валка выполнена из св занных между собой запоминающего устройс тва, компаратора и потенциометра,а выходы дат15 чиков перемещений св заны с входом компаратора, причем один из датчиков св зан с компаратором через запоминающее устройство, а выход пирометра подключен к входу компаратора 10, while the control system for discharging the pressure inner roll is made of interconnected memory, comparator and potentiometer, and the outputs of displacement sensors are connected to the comparator input, one of the sensors being connected to the comparator through the memory, and pyrometer connected to the input of the comparator

20 через потенциометр.20 through potentiometer.

При Э.ТОМ потенциометр выполнен с коэффициентом делени , пропорционсшьным диаметру прокатанного кольца.At E. THOMA, the potentiometer is made with a division factor proportional to the diameter of the rolled ring.

Claims

On fi, 1. Figure 1 shows a diagram of a rolling mill ring 25 with a shut-off device during the end of rolling; in fig. 2 is a diagram of a ring-rolling mill with a shut-off device; the front is the start of rolling of the next ring. A ring rolling mill with a shutoff device (Fig. 1) contains a rod 1 with a cylinder 2 and a roller 3, a pyrometer 4 measuring the temperature of the rolling ring 5 ,. a potentiometer for dividing the pyrometer signal 4 by a factor proportional to a given diameter of ring 5, a displacement sensor 7 that receives an impact from rod 1 when its role touches ka 3 with an external rolling roll 8, a displacement sensor 9 that receives an action from rod 1 when it contacts its roller 3 with the ring 5, the device 10 for storing the signal of the sensor 7, the comparator 11, which gives the command to retract the inner mill roll 12. The input of the comparator 11 is connected to the outputs of the memory device 10, the potentiometer 6 and the sensor 9 This constitutes the control system for the retraction of the pressure inner roll 12. The distance between the sensor 7 and the sensor 9 differs in the specified diameter of the ring at the end of rolling. Since the diameter of the ring depends on this distance, in order to increase its stability, the sensors are located in the zone of moderate temperatures on a common base made of a material with a low temperature coefficient of linear expansion, for example, from invar. Before starting rolling the next ring of FIG. 2) when the inner roller 12 with the finished ring is brought out of the rolling zone and the next inner roller 13 with the ring blank 14 is not yet fed into this zone, the cylinder 1 moves the rod 1 until the roller 3 contacts the outer roller 8. The second end The rod 1 acts on the sensor 7, the signal of which at this moment is recorded in the storage device 10. This signal corresponds to a change in the diameter of the ring, which arises due to the temperature expansion of the ring rolling units. The proposed mill operates as follows. The rod 1 is retracted by the power cylinder 2 from the outer roll 8, and the next billet 14 enters the rolling zone, after which the power cylinder 2 feeds the rod 1 until its roller 3 contacts the workpiece. As the diameter of the ring grows during rolling, the rod 1 moves towards the sensor 9. When the diameter of the ring approaches the specified value (Fig. 1), the second end of the rod 1 acts on the sensor 9, the signal of which serves as feedback. ring diameter The pyrometer signal 4, proportional to the deviation of the actual temperature of the ring at the end of rolling from the set one, passes through a potentiometer whose division ratio is proportional to the specified ring diameter, corresponds in size and sign to those To expand the ring. At the input of the comparator 11, the signal from the output of the storage device 10 and the signal from the output of the potentiometer b are summed algebraically. As soon as these signals are compensated by the feedback signal, the output of the comparator is a command to end the rolling of the ring. Compared to the known ones, the Ring Rolling Mill provides a reduction in the scrap rate of products and savings of bearing steel by reducing tolerances by increasing the dimensional accuracy of rolled rings. Claim 1. A ring rolling mill comprising a drive outer swath, a pressure inner roll and a shut-off device consisting of a power cylinder with a rod having a roller at the end installed in contact with the rolling ring, characterized in that accuracy of the dimensions of the rolling shix of the rings, it is equipped with a system; 1 controllable discharge of the pressure internal roll, connected with it by a pyrometer measuring the temperature of the rolled ring and two sensors for displacements associated with the circuit control and with the rod and placed one relative to another at a distance equal to the diameter of the rolling ring, the roller is installed with the ability to interact with the outer roller, while the control system for the discharge of the inner pressure roll is made of interconnected memory, comparator and potentiometer, inputs The displacement sensors are connected to the comparator input, one of the sensors is connected to the comparator via a memory device, and the pyrometer output is connected to the comparator input through a potential ometer

2. Stan according to claim 1, characterized in that the potentiometer is made with a division factor proportional to the diameter of the rolling ring. Sources of information taken into account during the examination 1. USSR author's certificate No. 650485, cl. B 21 N1 / On, 08.05.73 (prototype).