DE1961260A1 - Four-roll ring rolling mill - Google Patents

Description

4690 Herne, .-_- .. ".

Freillgrathstrasse ₁₉ f ⁰⁰ « ^ünclwn

Post ** ™ Dipl.-1 ng. R. H. Bahr ρΓαΓβ ^ Γ Pat-Aim. Herrmann-Tranlepohl _. . ^ PaL-Anw. BtUler

Telephone. 51013 Dipl.-PhyS. Eduard ΒθίζΙθΓ Telephone: 388011 5 10 14 39 80

Telegram address: DIpL-lüg. W. ΗβΓΓΠΙβηη-ΤΓβηΙβροΗΙ _τ , ³⁹⁸⁰¹³

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5 December 1969 Maschinenfabrik J. Banning AG, 4700 Hamm, Postfach 46

"Four-roll ring rolling mill"

The invention relates to a four-roll ring rolling mill with a roll stand with a pair of rolls that process the two curved ring surfaces and with an edging stand with a pair of edging rolls that is radially displaceable with respect to the ring and that works with one roll of each pair of rolls against the other in its radial distance, at least one roller and the compression roller pair depending on the enlargement of the ring outside diameter of this diameter in the range of this Stauchwalzenp _v Aares scanning sensing roller is adjustably driven automatically as a result of deflection slidable such that it always acts on the Ringetirnflach ·.

It is known to mount a limit switch at one point of the rolling device, which is set to the diameter of the finished ring with the aid of a ruler, so that when the Ring has almost reached the target value duration, the WaIi-V

109825/0879 ^X - 2 \ -

pressure is switched off. However, such a system does not work satisfactory, because the control deviation occurring when regulating the relative position and the abrupt ' normally switch the rolling pressure a difference between the actual value and the setpoint with regard to diameter and roundness is given. It is therefore with the known arrangement generally required to remeasure the workpiece still to roll.

The invention has set itself the task of reducing the changeover time of the machine, which is caused by a changing rolling program Adjustment of the limit switch would result in considerably shortening and, on the other hand, the required target diameter exactly to start, so that there is usually no need for re-rolling.

This object is achieved according to the invention in that the feeler roller and the edging stand are each connected to an actual value transmitter which determines the position of the ring relative to the edging stand or the position of the edging stand relative to the position of the rolling stand, the output signals of which are fed to a switching device to which a setpoint generator is connected is and the einfcfc actuates the rolling pressure when the actual and setpoint values are covered by a relay that switches off.

The ring rolling mill according to the invention is preferably further characterized by a further setpoint generator connected to the switching device for the correction of all roller and / or day rolling movements S.

In a further embodiment of the invention, the switching device feeds a display device, the pointer deflection of which is

Rolling from a maximum value down to one of the should zero or end position.

It can also be used with the display device and / or the switch, lais a signal device can be coupled, which when the target value is reached and / or when switching off the rolling pressure addresses and communicates this fact to the worker at the rolling mill

M- Mti, V. </ ?, // 10

109825/0879 - 3 -

The "drawing shows a single pig in a side view of a ring rolling mill according to the invention, the control device is only indicated schematically

The rolling mill consists of the horizontal rolling stand A and the vertical edging stand B, in which the two stands are common Rolling mill frame 1, the vertical shaft 2 is firmly mounted with the plate roller 3 and is via a gear 4 of a Electric motor 5 driven. The plate roller 3 can be displaced in relation to and against it and is hydraulically adjustable Slide 6 of the non-driven rolling die 7 is mounted. It is swiveled up hydraulically at its upper end and lowerable frame-shaped counter holder 8 supported. In the area of the plate roller 3 are the guide rollers 9, 10, which rotated about shafts 11, 12 by a hydraulic cylinder and thus moved apart and against the ring R to be rolled can be employed. The double reference numerals 9 »10 and 11, 12 indicate that on the other side of the Cup roller 3 has the same arrangement of the guide roller with the shaft as can be seen from the side view. On the other side of the rolling mandrel 8 7 is on the rolling mill frame 1 in Slide guides the edging frame B arranged displaceably. The shifting of this edging frame takes place over the double acting hydraulic cylinder 13. In the lower part of the edging frame B is the lower edging roller 14 in the form of a tapered roller firmly stored. It is via a fixed gear 15, for example driven by a DC motor 16. The gearbox and motor are designed in such a way that the speed of the tapered roller 14 can be controlled in such a way that the peripheral speed this conical roller is continuously adjustable over the entire length of the conical shell to the rolling speed of the plate roller 3

The upper edging roller, again in the form of a tapered roller 17, is freely rotatably mounted in a carriage 18 which runs in the axial direction of the ring to be rolled via a worm gear 19 driven by an unspecified motor and a spindle drive 20 can be employed. In addition to this employment, there is also the possibility of hydraulically continuing the slide 18 lower, for example by approx. 50 mm, and at the same time towards the

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rolling ring a force acting in the axial direction of the same exercise.

The feeler roller 21 is inserted between the tapered rollers 14, 17. It is attached to a rack, which is supported by an underside constant pressure hydraulic piston is constantly pressed into its front end position. The one when rolling in its diameter The growing ring R presses the feeler roller in the direction of the large diameter of the tapered rollers 14 and 17.

This feeler roller 21 is connected to an actual value transmitter 44, which thus determines the position of the ring R relative to the edging stand B. notices. The edging frame B is connected to an actual value transmitter 45 which determines the position of the edging frame B relative to the Main frame 1 and thus to plate roller 3 captured. The output signals of both actual value transmitters 44 and 45 are the electrical Device 48 supplied. The data of two setpoint generators 46 and 47 can also be entered into this device 48. The setpoint generator 46 is used, for example, to input the desired Finished diameter of the ring. The setpoint generator 47 is used to correct the device 48 when due to wear or reworking, the diameter of the plate roller 3 or the feeler roller 21 should have changed. For the individual actual value encoder any commercially available devices can be used. The device 48 continuously compares the sum of the two actual values from the actual value generators 44 and 45 with the sum of the setpoint values set by the setpoint generators 46 and 47 and delivers an electrical quantity dependent on this comparison into the measuring device 49.

The range of electrical to be delivered by device 48 Large voltages, for example, are designed in such a way that if there are deviations between the target and actual values, the lie above a certain value, for example over 100 mm, the instrument 49 is fed with full voltage, so that the pointer of this instrument is close to the full deflection. This difference is now during the rolling process is reduced between the actual and setpoint value and falls below the set value of 100 mm, for example, so moves the pointer of the instrument 19 continues to the zero point of the

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Measuring instrument. When the zero point is reached, the rolling pressure is also switched off via the hold relay 50. Further a signal lamp or a horn can be switched on to indicate optically or acoustically that the desired finished dimension is reached.

Through the display of the instrument 49, the worker at the rolling mill is able to determine the rolling pressure as a function of the decreasing pressure Reduce the difference between the setpoint and the actual value in such a way that that the rolling process is not interrupted abruptly. This results in great dimensional accuracy, good health and repeatability of the input measurements ensured. The device 48 can be any analog or digital device. Further is an automation of the adaptation of the rolling pressure to the decreasing deviation between the setpoint and the actual value Use of an appropriate computer is possible.

- Patent claims: -

10S825 / Ö879 " ⁶ "

Claims (1)

Claims Four-roll ring rolling mill with a roll stand with a die two curved ring surfaces machining roller pair and with an edging frame with one machining the ring end surfaces, radially displaceable with respect to the ring Upsetting roller pair, in which one roller each roller pair against the other are adjustable in their radial distance, at least one roller can be driven and the pair of edging rollers are automatic Dependence on the enlargement of the outer ring diameter as a result of the deflection of a feeler roller which scans this diameter in the area of this pair of edging rollers is displaceable in such a way that it always acts on the ring end face, characterized in that the feeler roller (21) and the edging frame (B) each with a position of the ring (R) relative to the edging frame (B) or the Position of the edging stand (B) relative to the position of the rolling stand (A) are connected to the actual value transmitter (44 or 45), the output signals of which are fed to a switching device (48) to which a setpoint generator (46) is connected and which actuates a relay (50) which switches off the roller pressure when the actual and setpoint values are covered. 2. ring rolling mill according to claim 1, characterized by another, to the switching device (48) connected setpoint generator (47) to correct any roller and / or feeler roller wear. 3. Ring rolling mill according to claim 1 or 2, * characterized in that the switching device (48) ' a display device (49) feeds the pointer deflection as the orphan progresses from a maximum value to one * "approaches the zero position corresponding to the setpoint. 4 Ringwalewerk according to one or more of the preceding Aa- 10S325 / Ö879 t i ö -? * Proverbs, characterized by rc Ii a signal device coupled to the display device (49) and / or the Sehaltrelais (5f ■) , which responds when the setpoint is reached. 5. Bing mill according to one or more of the preceding
Claims, characterized by
a computer to automate the adjustment of the rolling pressure to the decreasing deviation between the target and actual value of the hinges (R). Blank page