Quick-action adjustment for adjusting cylinder in edging stands

Abstract

An adjusting cylinder quick-action adjustment for a long, rapid stroke movement in an edging stand which includes an edger upright, adjustment system, balancing system and edging roll sets, comprises a piston which acts via edging roll chocks of at least one edging roll for adjustment against the rolling stock. The adjustment of the edging roll can be actuated on each side hydraulically by a fluid. The adjusting cylinder quick-action adjustment is mounted in the edger upright and exerts the force required for the edging process. The adjusting cylinder quick-action adjustment includes on each side of the edging upright at least one double cylinder which has two cylinders coupled to one another and is separately controllable and configured for rapid adjustment and for control adjustment of the edging roll.

Claims

1. An edging stand, comprising: an edger upright; an edging roll chock; an edging roll rotatably mounted in the edging roll chock; and an adjusting cylinder quick-action adjustment for executing a long, rapid stroke movement, said adjusting cylinder quick-action adjustment being mounted in the edger upright and configured to exert a force required for an edging process, said adjusting cylinder quick-action adjustment including on each side of the edging upright a double cylinder, with the double cylinder comprising a rapid adjustment cylinder and a control adjustment cylinder which are coupled to one another and separately controllable for rapid adjustment and for control adjustment of the edging roll, a first cylinder piston received in one of the cylinders and configured to act on the edging roll via the edging roll chock against a rolling stock for adjustment against the rolling stock on both sides, with the adjustment of the edging roll being actuatable on each side hydraulically by a fluid, and a second cylinder piston received in the other one of the cylinders, said first and second cylinder pistons having a same stroke travel.

2. The edging stand of claim 1, wherein the second cylinder piston and a housing of the control adjustment cylinder are connected with a same fixed bank of the edger upright.

3. The edging stand of claim 2, wherein the second cylinder piston is connected with the first cylinder piston, with a housing of the rapid adjustment cylinder being connected with a same fixed bank of the housing of the control adjustment cylinder.

4. The edging stand of claim 1, wherein the first cylinder piston includes a piston rod and is configured to execute the control adjustment, said piston rod being made in one piece with a housing of the rapid adjustment cylinder.

5. The edging stand of claim 1, wherein the first cylinder piston includes a piston rod and is configured to execute the control adjustment, said piston rod being connected with a housing of the rapid adjustment cylinder, wherein the second cylinder piston is configured to execute the rapid adjustment and is connected with a same fixed bank of a housing of the control adjustment cylinder.

6. The edging stand of claim 1, wherein the second cylinder piston is configured to execute the rapid adjustment, wherein the rapid adjustment cylinder and the control adjustment cylinder are configured for separate activation from one another, with a movement of a housing of the rapid adjustment cylinder or a movement of the second cylinder piston, as triggered by the activation, causes a movement of the first cylinder piston of the control adjustment cylinder.

7. The edging stand of claim 1, wherein the rapid adjustment has an adjustment speed which is greater than an adjustment speed of the control adjustment by a multiple as a result of surface ratios of the first and second cylinder pistons at same volumetric flow rate of the fluid.

8. The edging stand of claim 1, wherein the double cylinder includes a non-active part which is configured to conduct a displaced hydraulic fluid volume during an adjusting movement into a respectively other cylinder chamber, wherein lacking fluid volume is replenishable and excess fluid volume is drainable.

9. The edging stand of claim 1, wherein the first cylinder piston of the control adjustment cylinder of the double cylinder is configured as a piston with two piston rods pointing in opposite directions.

10. The edging stand of claim 9, wherein the piston rods have a same diameter.

11. The edging stand of claim 1, wherein the second cylinder piston is configured to execute the rapid adjustment, said second cylinder piston of the double cylinder being configured as a piston and two piston rods pointing in opposite directions.

12. The edging stand of claim 11, wherein the piston rods have a same diameter.

13. The edging stand of claim 1, wherein the cylinders of the double cylinder are structurally interleaved within one another to realize a compact construction.

14. The edging stand of claim 1, wherein the first cylinder piston of the control adjustment cylinder forms a housing or the cylinder of the rapid adjustment cylinder.

15. The edging stand of claim 1, further comprising a cylinder head associated to the control adjustment cylinder to reduce a radial force upon an adjustment from a leading pass impact.

16. The edging stand of claim 1, wherein the second cylinder piston is configured to execute the rapid adjustment, said first and second cylinder pistons] being equipped with an anti-rotation mechanism.

17. The edging stand of claim 1, further comprising a distance measuring system associated to each of the control adjustment cylinder and the rapid adjustment cylinder.

18. The edging stand of claim 1, further comprising valves configured for separate operation for activation of the cylinders of the double cylinder.

19. The edging stand of claim 18, wherein the valves are configured as servo valves or proportional valves or directional control valves.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The invention will now be described in greater detail with reference to an exemplified embodiment. It is shown in:

(2) FIG. 1 the schematic illustration or an edger by way of a partial sectional view with the adjusting cylinder quick-action adjustment with two double cylinders for the rapid adjustment and the control adjustment;

(3) FIG. 2 the illustration of a possible control diagram for a double cylinder of the adjusting cylinder quick-action adjustment shown by sectional view;

(4) FIG. 3 the schematic sectional illustration of the hydraulic fluid flow when the double cylinder according to FIG. 2 moves out;

(5) FIG. 4 the schematic illustration of a possible control diagram of the adjusting cylinder quick-action adjustment shown by sectional view and connected to a control cylinder;

(6) FIG. 5 the schematic sectional illustration of the hydraulic fluid flow when the double cylinder according to FIG. 4 moves out.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(7) As shown in FIG. 1, the adjusting cylinder quick-action adjustment 9 according to the invention is formed as an integral part of an edger 10. The edger 10 is provided to edge the edges of a rolling stock 11 entering the edger 10 in order to deliberately influence the width of the entering rolling stock 11 during the ongoing rolling process. For this purpose, the edger 10 includes on one side at least one edger upright 20 which is connected with an edger crosshead 21.

(8) Furthermore, provision is made for upper and lower edger bars 22 and 23. An adjoining edging roll unit 30 essentially includes upper and lower edging roll chocks 32 and 33 in which an edging roll 31 is rotatably mounted.

(9) Balancing of the rolling force transmitted onto the edging roll 31 is implemented with the aid of an edging roll balancer 40. The edging roll balancer 40 includes a balance crossbeam 41 and a balance cylinder 42. The balance crossbeam 41 is connected to the edging roll chocks 32, 33. The balance cylinder 42 acts via the balance crossbeam 41 and via the connected edging roll chocks 32, 33 upon the double cylinder 50 and applies no working force upon the rolling stock 11. In this embodiment, the double cylinders 50 are respectively associated to the upper and lower edging roll chocks 32 and 33 and in linear force direction.

(10) The double cylinder 50 includes the control adjustment 51 and the rapid adjustment 52 connected therewith. The rod side 51a of the control adjustment 51 forms hereby a housing 54a for the piston 54 of the rapid adjustment 52. The piston 54 is hereby connected with the housing of the control adjustment 51. The control adjustment 51 is also associated to a piston 53. The piston 53 has a greater diameter than the piston rod 53a connected thereto. The piston rod 53a forms at the same time the housing 54a of the rapid adjustment. Its end, in direction of the edging roll 31, is established by the arrangement in a cylinder head 55. A displacement pick-up 56 is associated to the rapid adjustment 52 and allows determination of the travel path of the pistons 53 and 54. Furthermore, an anti-rotation mechanism 57 is associated to the rapid adjustment 52 in order to prevent a rotation of the pistons 53 and 54 in the respective cylinders about their longitudinal axis.

(11) FIG. 2 shows a possible control system 60 for the adjusting cylinder quick-action adjustment 9 with double cylinder 50 provided for this. For this purpose, provision is made for a first control valve 61 for the rapid adjustment 52 and at least one second control valve 62 for the control adjustment 51. The control system 60 for the rapid adjustment 52 is established via at least one short-circuit valve 63 which is arranged between the inlet and outlet 63a for the hydraulic fluid and thereby virtually directly connect them with one another. In addition, provision is made for a further second short-circuit valve 64, which connects the piston side of the rapid adjustment with a suitably biased system for the purpose of volume compensation. The control system 60 of the control adjustment 51 is also realized via at least one short-circuit valve 65 which connects the inlet and outlet 65a with one another. The hydraulic fluid can hereby flow in a circulation and can be collected in a fluid reservoir and fed from there via a pump P into the control system 60.

(12) FIG. 3 describes the fluid flows during out movement in arrow direction using the rapid adjustment. The control system 60 described in FIG. 2—of the rapid adjustment—connects with the valve 61 the piston volume 54 of the rapid adjustment 52 with the pressure supply and the rod volume 70a of the rapid adjustment with the return flow. As a result, the rapid adjustment is actively activated and set in motion. At the same time, the control system 60 connects the two cylinder volumes of the control adjustment 51 via the valve 65 with one another, so that the fluid can be displaced by the movement, caused by the rapid adjustment, directly from one cylinder chamber into the other.

(13) FIG. 4 shows a possible control diagram 80 of the double cylinder 50 with a connected control cylinder in a follower control circuit 81. The control system includes at least one additional first short-circuit valve 83 and at least one additional second short-circuit valve 84. As a result, the fluid can be displaced from one cylinder chamber of the control adjustment 51 directly into the oppositely arranged cylinder chamber of the subsequent control adjustment 51B. In the same manner, the displaced fluid of the control adjustment 51B can flow directly into the oppositely arranged cylinder chamber of the control adjustment 51.

(14) As a result of volume differentials in the cylinder chambers or pressure lines, that may be result during manufacture, lacking or excess fluid volume can be fed into or drained from the storage container via the valve 82.

(15) FIG. 5 is a schematic illustration of the fluid flow 90 in a follower control circuit when a double cylinder 50, connected with a control adjustment 51 and a rapid adjustment 52, moves out. The term moving out relates to the movement of the control adjustment 51 in direction of the arrow and thus towards the edging roll and in direction of the rolling stock.

LIST OF REFERENCE SIGNS

(16) 9 adjusting cylinder quick-action adjustment 10 edger partial view in section 11 rolling stock 20 edger upright 21 edger crosshead 22 edger bar top 23 edger bar bottom 30 edging rolling unit 31 edging roll 32 edging roll chock top 33 edging roll chock bottom 40 edging roll balancer 41 balance crossbeam 42 balance cylinder 50 double cylinder 51 control adjustment 51a rod side 51B control adjustment 52 rapid adjustment 53 cylinder piston of the control adjustment 53a piston rod 54 cylinder piston of the rapid adjustment 54a housing 55 cylinder head 56 displacement pick-up 57 anti-rotation mechanism 60 possible control diagram of a double cylinder 61 control valve rapid adjustment 62 control valve control adjustment 63 first short-circuit valve 63a inlet and outlet (pressure lines) 64 second short-circuit valve 65 short-circuit valve control adjustment 66, 66a fluid reservoir 70 fluid flow during out movement for (60) in the operating mode rapid adjustment 80 control diagram of the double cylinder with a movable control cylinder 81 follower control circuit 82 control valve control adjustment 83 first short-circuit valve in follower control circuit 84 second short-circuit valve in follower control circuit 90 fluid flow during out movement for (80) of a double cylinder in the operating mode rapid adjustment P pump