FR2583999A1 - DEVICE FOR COOLING AND / OR LUBRICATING THE ROLLERS OF A COLD ROLLING MILL - Google Patents

Abstract

COOLING AND LUBRICATING DEVICE FOR THE CYLINDERS OF A COLD ROLLER. THE RAMPS OF NOZZLES 8 CAN SLIDE INDEPENDENTLY OF ONE OF THE OTHERS CROSSING THE DIRECTION OF PASSING OF BAND A, DEPENDING ON THE POSITION OF THE EDGES OF BAND 14, 15, DETERMINED BY MEASURING DEVICES 12, AT THE EXIT OF ' A ROLLER CAGE. METALLURGY.

Description

Cooling and / or lubrication device

  cylinders of a cold rolling mill.

  The invention relates to a cooling device

  lubrication and / or lubrication of the rolls of a strip cold rolling mill, in particular a rolling mill for

  thin strips, including spray nozzles

  the width of the band, in particular to regulate

  the tensile force over the width of the belt, by zone-by-zone modification of the actual diameter of the cylinder table and / or to influence the lubrication of the cylinders in order to

a regulation of flatness.

  The precision requirements of dimensions and

  Cold-rolled thin strip shapes have increased

  in a considerable way during the development of

  rolling technology and subsequent processing. An ideal cold band must have, no

  only the same thickness in the length and width

  but also be perfectly flat. The place

  must therefore be preserved, even when the band

  is cut out during subsequent processing.

  For the regulation of flatness,

  as regulating quantities, only quantities which are liable to change at short notice, and which are not determined by other technological requirements. Available setting variables

  are thus limited to cooling and lubricating

  of cylinders, cylinder deflection and

  at an inclined position of the cylinders perpendicular-

to the rolling plane.

  Cooling and lubrication of

  cylinders is of great importance for the

  the flatness and thickness of the strip.

  The cooling and lubricating devices of the cylinders implemented so far> with ramps

  nozzles arranged in a fixed manner are sufficient in

  how to meet the great demands of

  for the regulation of flatness and thickness

thin bands.

  The aim of the invention is to develop a device for cooling and lubricating the rolls of a cold rolling mill for belts, having a method of

  operation of cooling and lubricating

  of the cylinders on surface areas of the precisely defined cylinder tables, which is substantially improved with respect to the devices.

known of this type.

  The device according to the invention is

  controlled by a control of the transverse adjustment of the nozzle ramps, which can slide independently of each other, transversely to the direction of passage of the strip, depending on the position of the

  edges of the band, determined by apparatus of

  sure at the exit of a rolling mill cage.

  The invention is explained in detail in this

  following, by means of the design of the cooling device

  lubrication and lubrication of cylinders implemented in a quarto mill for thin banks. In the attached schematic drawing: FIG. 1 is a plan view of the device

  of cooling and lubrication according to the

  invention in a quarto mill, and FIG. 2 is a perspective view of the

  series of cylinders of a quarto mill equipped with a

  positive cooling and lubricating cylinders according to Figure 1. According to Figures 1 and 2, the cooling device and lubricating cylinders-de

  1, 2 and support cylinders 3, 4 of a lami-

  quarter black, consists of a nozzle ramp 5 for each of the support cylinders 3, 4 and three ramps

  of nozzles 6 to 8 for the work rolls 1, 2.

  In the nozzle manifolds 5 to 8 are mounted nozzles

  for spraying 9 with cooling oil and / or emulsion

  on the cylinders 1 to 4. The nozzle ramps 5

  at 7 are fixed, while the nozzle ramps 8 can

  By means of the driving devices 10, they can be displaced along the width of the strip transversely to the direction of passage of the band a. In addition,

  can adjust the distance of the nozzle ramps 8 by

  to the series of cylinders 11. Finally, one can also provide a possibility of continuous mutual displacement transversely to the direction of passage of the band

  a and a rotation adjustment of the nozzles 9 of the two ram-

number of nozzles 8.

  The arrival of rolling oil and / or emulsion

  the nozzle ramps, which can be moved, is

  depending on the pressure and / or flow

and / or temperature.

  At the exit of the strip, downstream of the series of rolls lld'un rolling stand, not shown, are mounted on both sides of the passage of the strip,

  measuring devices 12 for measuring the posi-

  edges 14, 15 of the thin strip 13 relative to

in the middle of the cylinders 16-16.

  With the aid of the control motors 17, the measuring devices 12 are first placed in position, exactly on the path of the medium, the band 13 which has a prescribed set width. In operation, the measuring devices 12 which detect the edges 14, 15 of the moving band, provide signals which

  tinus that change, when the band 13 scrolls with

  lateral adjustment, in proportion to the change in

  position of the edges of the strip 14, 15 with respect

port in the middle 16-16 cylinders.

  When the band 13 passes without centering, the ramps of nozzles 8 which can slide and which are adjusted for a centered passage of the band, are set transversely to the direction of passage of the band a, depending on the position of the edges of the band. band 14, 15 at the output thereof, which is determined by

measuring devices 12.

  Thanks to the guidance of the nozzle ramps 8, which can

  slide transversely to the direction of pas-

  When the belt passes without being centered, and thanks to the possibility of mutual displacement as well as a rotation of the spray nozzles 9 of the nozzle nozzles 8, it is possible to adjust the position of the zones with precision. spraying on the cylinders, the width of the spray zones and

  the configuration of the sprays provided by the

  his. The regulation of pressure, temperature and

  the amount of lubricating oil or emul-

  sent to the nozzle ramps 8 influences the

  cooling of the work rolls 1, 2, and therefore

  the value and speed of the variation in the

  of the cylinder table or the lubricant

working rolls 1, 2.

Claims (1)

CLAIM   Cooling and / or lubricating device   Cylinders of a cold rolling mill for webs, in particular a thin-strip rolling mill, comprising spray nozzles arranged over the width of the web, in particular for regulating the tensile force over the width of the web by a variation, zone by zone, of the actual diameter of the table of the rolls and / or to influence the lubrication of the   cylinders for flatness control,   controlled by a control of the transverse adjustment of the nozzle ramps (8), which can slide independently of each other, transversely to the direction of passage of the strip (a) in function of the position of the edges (14, 15) of the band, determined by devices   measuring device (12) at the exit of a roll stand.