DRAWING SYSTEM FOR GENERATING PROFILED METAL SECTIONS, AND METHOD FOR AUTOMATICALLY OPERATING SUCH A DRAWING SYSTEM

Abstract

A drawing system and a method for automatically operating a drawing system. At least one quality-relevant feature of a drawn product, selected from a group of features including the straightness of the drawn product, the length of the drawn product, the diameter and/or at least a thickness of the drawn product, the roundness of the drawn product, and the surface quality of the drawn product, is measured by at least one quality sensor, and the obtained measurement value is processed in at least one control circuit which acts on at least one quality-relevant manipulated variable of the drawing system or parts of the drawing system via at least one controller., At least one reference variable for at least one quality-relevant feature of a specific drawn product is processed in a process controller.

Claims

1-15. (canceled)

16. A drawing system for producing metal profiles, comprising at one control circuit which acts on at least one quality-relevant parameter of the drawing system via at least one controller, wherein at least one process controller in which at least one reference variable of the control circuit is processed in relation to a specific drawn product in the form of an intermediate product and/or end product in the form of an adjustable operating point of the drawing system or individual parts of the drawing system, wherein at least one quality sensor for preferably continuously detecting at least one quality feature of an intermediate product or an end product of a drawn product, wherein the quality sensor is selected from a group of quality sensors comprising a sensor for detecting the straightness of the drawn product, a sensor for detecting the diameter and/or at least one thickness of the drawn product, a sensor for detecting the length of the drawn product, a sensor for detecting the surface quality of the drawn product, a sensor for detecting the roundness of the drawn product and a sensor for checking the chamfered ends of the drawn product.

17. The drawing system according to claim 16, wherein the operating point for the specific intermediate product or the end product can be selected via an operating unit which acts on the at least one controller which automatically sets the relevant operating point of the drawing system for a specific drawn product.

18. The drawing system according to claim 16, wherein the process controller comprises at least one memory and evaluation unit in which the operating point for the specific intermediate product or the end product can be stored.

19. The drawing system according to claim 16, further comprising a plurality of control circuits, each control circuit acting on a different quality-relevant parameter of the drawing system or of parts of the drawing system.

20. The drawing system according to claim 16, wherein the process controller acts on a control unit which controls a plurality of controllers.

21. A method for the automatic operation of a drawing system with the features of claim 16, in which at least one quality-relevant feature of a drawn product, selected from a group of features comprising the straightness of the drawn product, the length of the drawn product, the diameter of the drawn product and/or at least a thickness of the drawn product, the roundness of the drawn product, the accuracy of the profile of the drawn product, the quality of the chamfered ends of the drawn product and the surface quality of the drawn product are measured by means of at least one quality sensor, the measurement value obtained is processed in at least one control circuit which acts on at least one quality-relevant manipulated variable of the drawing system or parts of the drawing system via at least one controller, wherein at least one reference variable for at least one quality-relevant feature of a specific drawn product in the form of an intermediate product and/or end product is processed in a process controller, the reference variable defines an operating point of the drawing system or parts of the drawing system or is used to define an operating point of the drawing system or parts of the drawing system and the operating point can be set on the basis of a specific drawn product.

22. The method according to claim 21, wherein the process controller comprises a memory and evaluation means in which at least one operating point of the drawing system is stored.

23. The method according to claim 21, wherein a plurality of quality-relevant features of the drawn product are measured, that each measurement value is processed at least in its own control circuit.

24. The method according to claim 21, wherein an operating point of the drawing system or of parts of the drawing system is defined by a plurality of reference variables.

25. The method according to claim 21, wherein at least one measurement value is processed in a plurality of control circuits.

26. The method according to claim 21, wherein a product-specific operating point is defined via a plurality of control circuits of the drawing system.

27. The method according to claim 21, wherein an operating point of the drawing system is optimized during operation in relation to a specific drawn product.

28. The method according to claim 21, wherein at least one measurement value is detected continuously during the operation of the drawing system.

29. The method according to claim 21, wherein a single measurement value for a certain quality-relevant feature of a drawn product is processed as a reference variable in control circuits of respectively successive parts of the drawing system and the control circuits of the successive parts of the drawing system are linked to one another in a cascade-like manner, so that manipulated variables for successive parts of the drawing system are derived from the control deviation one after the other and/or in parallel.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0041] The invention is explained below with reference to the accompanying drawings, in which

[0042] FIG. 1 shows a schematic illustration of a closed control circuit at a drawing system according to the invention, and

[0043] FIG. 2 shows a schematic illustration of the control scheme with several closed control circuits at a drawing system according to the invention.

DETAILED DESCRIPTION

[0044] FIG. 1 shows schematically an automatic control at a drawing system 1 according to the invention as a block diagram. The drawing system 1 can be designed, for example, to produce bright steel from a wire produced by a continuous casting process and subsequent rolling. A workpiece 2 as drawn product, for example in the form of a round wire, passes through the drawing system 1 from left to right, with a quality feature of the wire (for example thickness, diameter, roughness, straightness or dimensional accuracy of a chamfered end of the drawn product) being measured with a quality sensor 3 on the output side. The measurement value obtained is fed to a process controller 4. The process controller 4 comprises a memory and evaluation unit as well as at least one controller which, by outputting a corresponding manipulated variable, acts on an actuating means 5 to influence a quality-relevant parameter of the drawing system 1. External information can be entered into the process controller 4 via an operating unit 6. A product-specific operating point of the drawing system 1 can be set via the operating unit.

[0045] The block diagram according to FIG. 2 expands the control scheme shown in FIG. 1 to include a plurality of quality sensors 3 and a plurality of actuating means 5 for the drawing system 1 according to the invention. Identical parts are provided with corresponding reference numerals. Otherwise, the block diagram according to FIG. 2 corresponds in principle to that according to FIG. 1.

LIST OF REFERENCE NUMERALS

[0046] 1 drawing system

[0047] 2 workpiece

[0048] 3 quality sensor

[0049] 4 process control

[0050] 5 actuating means

[0051] 6 operating unit