MXPA00007444A

MXPA00007444A - Method for controlling the tension of the wire between the finishing block and the following block in wire rolling mills.

Info

Publication number: MXPA00007444A
Authority: MX
Inventors: Muller Hubert
Original assignee: Sms Demag Ag
Priority date: 1999-07-31
Filing date: 2000-07-28
Publication date: 2002-07-22
Also published as: BR0003203A; EP1074318A2; DE19936140A1; EP1074318A3

Abstract

Process for regulating the wire pull between a finishing block and a post-block of a wire rolling mill comprises regulating the number of revolutions of the drives of the finishing block and the post-block depending on the measurements of the thickness of the wire passing through the blocks using adjustment values which are based on measurements of the wire before entering the finishing block and computer-processing the corresponding measured values in comparison with pre-calculated theoretical values or empirical values.

Description

PROCEDURE FOR THE REGULATION OF THE WIRE STRIP THE FINISHED BLOCK AND THE NEXT BLOCK IN THE WIRE LAMINATION ROUTES Field of the Invention The invention relates to the regulation of wire traction between the finished block and the next block, where the The number of rotations of the impeller of the finished block and the following block is regulated in a variable manner depending on the thickness measurements of the wire running through the blocks. BACKGROUND OF THE INVENTION Modern high power wire ways or lines generally consist of a pre-lane, one or more intermediate lanes and a final rolling block for the laminate. The rolling equipment in the previous and intermediate tracks is built relatively heavy and prepared for high rolling pressures. On the previous track and on the intermediate track, individual equipment arranged one behind the other with a vertical-horizontal arrangement of the rolling mills is generally used. The following rolling termination block consists of several rolling units, almost always from 6 to 10 displaced approximately 90 ° each other, which in one line tightly one after the other make up a block, and their rolling units are driven by a impeller directly and together by means of a distribution gear. A section of cold water with a section of temperature equalization for the wire usually follows this termination block. Depending on their size and quality, the cooling zones are controlled in such a way that a predetermined temperature profile in the wire is also achieved at high rolling speeds. After that section of cooling water follows another called back block, which consists of at least 2 and a maximum of "n1 rolling units that make up a block." With this arrangement the taking of joint steps of the track is allowed to increase It is also possible to increase the final rolling speed at an invariable speed level of the rolling path and influence and the wire structure by an objective cooling before the last step in this block. The wire is laminated with minimum or high pitch in relation to the finishing rolling block, this is the subsequent rolling block works as a precision rolling block to increase the surface quality of the wire. of the type mentioned at the beginning with a lamination installation of the indicated conformation (EP 0 219 316 Bl) provides each time before s and after the termination block an apparatus for measuring the thickness of the wire entering the termination block and the wire leaving the termination block and thereby as impellers for the termination block and the rear block each time engines whose number of revolutions It is adjustable. In addition between the end block and the rear block the wire is only touched but it is not formed by a pair of transport rollers driven by an adjustable speed motor. The two devices for measuring the thicknesses of the wire before and after the termination block transmit their measured values to a computer, to which values of the number of revolutions of the drive motors of the termination block and the rear block and the value of the number of revolutions of the drive motor of the pair of transport rollers. The computer emits when comparing the results of the measurements of the coarse wire before and after the block of manufacture, the elongation caused by the rolling process in the said block of the wire rope. Next, the computer outputs the values of the critical speed numbers of the drive motors of the termination block, of the back and of the pair of transport rollers the volume d of the wire rope that leaves the blog of termination per unit of time and the relative value of the numbers of revolutions of the impellers of the block of termination and of the posterior block and gives a threshold value restored from that number and the value of the number of revolutions of the pair of transport rollers for the number of revolutions of the impeller of the rear block for the generation of the tension provided in the wire rope. The computer thus continuously compares the aforementioned current value with the calculated values or with experienced values and establishes the values obtained in values of number of revolutions for the boosters of the termination blog and the subsequent block. On this in small wire thicknesses the speed of the wire leaving the termination block too high, for within the technically limited distance between the termination block and the rear block have enough time to perform a satisfactory regulation. Description of the invention The invention proposes the objective of this procedure, which requires a high expense and frequently exposed to failure in measuring devices and calculating capacity, is improved so that the expense decreases and the possibility of failure is minimized or disorder. This objective is achieved, because the regulation of the number of revolutions of the impeller of the termination block and dependent on this the regulation of the number of revolutions of the impeller of the rear block is caused with threshold values, which are based on measurements of the thickness of the wire before entering the computer's completion and processing block of the corresponding measured values compared to previously calculated theoretical values or experimental values. For the method according to the invention, only one measuring device is used each time for the thickness of the wire in the anterior area of the termination block, that is in a region of still relatively low wire speeds and where a computer is also needed. relatively small, which only compares the series of measured values with the fixed predated values.

Claims

NOVELTY OF THE INVENTION Having described the invention as above, the following is claimed as property: CLAIMS

1.- Procedure for regulating the wire draft between the termination block and the rear block of the tracks or lines of rolling wire, in which the number of revolutions of the impellers of the termination block and of the rear block is regulated in a variable manner depending on the thickness of the wire running through the blocks, characterized in that, the regulation of the number of revolutions of the impeller of the blog of termination and dependent on this the regulation of the number of revolutions of the impeller of the rear block is caused by threshold values, which are based on the measurements of the wire before its entry into the termination block and elaboration by the computer of the values of corresponding measurements compared to pre-calculated theoretical values or experimental values.