US20010027672A1 - Roller cooling and lubricating device for cold rolling mills such as thin strip and foil rolling mills - Google Patents
Roller cooling and lubricating device for cold rolling mills such as thin strip and foil rolling mills Download PDFInfo
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- US20010027672A1 US20010027672A1 US09/827,704 US82770401A US2001027672A1 US 20010027672 A1 US20010027672 A1 US 20010027672A1 US 82770401 A US82770401 A US 82770401A US 2001027672 A1 US2001027672 A1 US 2001027672A1
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- Prior art keywords
- nozzle
- beams
- rollers
- spray nozzles
- strip
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
- B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0064—Uncoiling the rolled product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
Definitions
- the invention relates to a roller cooling and/or lubricating device for cold rolling mills for strip, in particular, thin strip rolling mills and foil rolling mills, comprising nozzle beams correlated with the individual rollers and mounted on side shields of the roll housings of one or more roll stands, the nozzle beams having spray nozzles mounted therein across the width of the rollers and being adjustable relative to the correlated rollers independent from one another transverse to the running direction of the rolled strip in planes that are parallel to the strip plane, for the purpose of controlling the strip tensile stress across the strip width by a change of the effective roll barrel diameter and/or by affecting the roller lubrication with a pressure-controlled and/or quantity-controlled and/or temperature-controlled supply of rolling oil or emulsions.
- the flatness control of the rolled strip in a cold rolling mill for strip which is furnished with a roller cooling and/or lubricating device of the aforementioned kind known from German patent 34 19 261 C3, is based on a change of the spray pattern of the rolling oil sprayed onto the surface of the working rollers or the sprayed-on emulsions.
- the change of the spray pattern is effected by an adjustment of the nozzle beam, correlated with each one of the working rollers of the rolling mill, relative to the working roller independent of the respective other nozzle beams transverse to the strip running direction in a plane which is parallel to the strip plane and a pressure-controlled and/or quantity-controlled and/or temperature-controlled supply of rolling oil or emulsions.
- Thin strip and foil strip which are rolled on a four-high or six-high roll stand with the known flatness control, are characterized by a high quality with respect to dimensional precision and shape precision as well as flatness.
- a disadvantage of roller cooling and/or lubricating devices of the aforementioned kind for cold rolling mills of strip is the insufficient accessibility of the nozzle beams with the spray nozzles and their corresponding control valves so that repair and maintenance work on the nozzle beams is cumbersome and time-consuming.
- the nozzle beams are movable by means of a linear drive (adjusting cylinders) in the direction of their longitudinal axis transverse to the running direction of the rolled strip and rotatable by means of a rotary drive about the longitudinal axis;
- b) positioning devices are arranged on the roll stand or the roll stands for moving the nozzle beams from a roller-remote maintenance position into the working position at the rollers and from the working position into the maintenance position;
- the spray nozzles which are mounted at identical spacing within the nozzle beams, have: a nozzle holder, which is inserted into corresponding openings in the front wall section facing a roller as well as the rear wall section of a nozzle beam, sealed relative to the nozzle beam, and penetrates the interior space thereof; moreover, a nozzle head, which is inserted into a bore in the forward end of the nozzle holder facing the roller, preferably is screwed into it, or which is placed onto the forward end of the nozzle holder, preferably screwed thereon, and which has at least one nozzle opening and an ante-chamber; a rotary slide valve which is supported in a central throughbore of the nozzle holder so as to be rotatable about the longitudinal axis of the spray nozzle and has a blind bore open toward the nozzle head and has in the area of the blind bore at least one inlet opening which, in the open position of the spray nozzle, is aligned with a corresponding inlet opening
- the roller cooling and/or lubricating device has the following advantages.
- the spray angle of the spray nozzles of the nozzle beams relative to the rollers which is adjustable by rotating the nozzle beams about the longitudinal beam axis, provides a further parameter in addition to the adjustability of the nozzle beams relative to the respectively correlated roller transverse to the strip running direction as well as to the change of the quantity, the pressure, and the temperature of the rolling oil sprayed onto the rollers or the sprayed-on emulsions for changing the spray pattern on the roller surface within the context of a strip flatness control.
- the spray angle of the spray nozzles as an additional parameter makes possible an optimization of the strip flatness control.
- the spray nozzles By rotating the nozzle beam by 180°, the spray nozzles can be moved in a simple way from the roller-proximal working position into a roller-remote maintenance position for a simple and fast performance of required maintenance and repair work.
- the positioning devices mounted on the roll stands make possible a simple movement of the nozzle beams from the working position at the rollers into a maintenance position remote therefrom in which all nozzle beams are easily accessible for repair and maintenance work.
- the pressure in the cooling medium supply lines of the spray nozzles can be maintained substantially constant independent of the number of actuated nozzles so that liquid shocks as a result of pressure fluctuations, which can result in damage to the cooling medium lines and the control valves, are prevented.
- the rotary slide valve which is used for the spray nozzles of the roller cooling and/or lubricating device requires together with the control member, that, as a result of the small mass of the rotary slide valve, needs only a minimal control force, only little space so that the mounting space necessary across the strip width for each individual spray nozzle is significantly smaller in comparison to known roller cooling and/or lubricating devices, and the spray zone width of the spray nozzles is correspondingly reduced and, accordingly, the precision of the strip flatness control is significantly improved.
- FIG. 1 is a perspective illustration of a four-high stand with nozzle beams for cooling and lubricating the working rollers and the support rollers;
- FIG. 2 is a front view of the nozzle beams according to FIG. 1;
- FIG. 3 is a section illustration of a rotational and sliding support of one end of a nozzle beam positioned in the working position
- FIG. 4 is a section view of a rotational and sliding support of the nozzle beam in a maintenance position which is rotated by 180° relative to the illustration of FIG. 3;
- FIG. 5 is a four-high stand with nozzle beams in the maintenance position, a removal hasp, and devices for introducing the rolling strip into the rolling gap;
- FIG. 6 shows the four-high stand corresponding to FIG. 5 with nozzle beams in the working position
- FIG. 7 shows the control of the spray nozzles for a four-high stand
- FIG. 8 is a longitudinal section of a spray nozzle provided with a rotary slide valve in the closed position
- FIG. 9 shows in an illustration corresponding to FIG. 8 the spray nozzle in the open position
- FIG. 10 shows an altered embodiment of the spray nozzle according to FIGS. 8 and 9.
- the four-high stand of FIG. 1 is comprised of two roll housings, not shown, in which in chocks, not shown, an upper working roller 3 and a lower working roller 2 as well as a lower support roller 4 and an upper support roller 5 are rotatably supported.
- the roller cooling and/or lubricating device suitable for the flatness control of the rolled strip 6 , for the working rollers 2 , 3 and the support rollers 4 , 5 is comprised of a nozzle beam 7 , 8 , respectively, for the working rollers 2 , 3 and a nozzle beam 9 , 10 for the support rollers 4 , 5 , respectively.
- spray nozzles 11 are mounted in the nozzle beams 7 - 10 with control valves 12 , arranged upstream thereof and formed as solenoid valves, for supplying cooling oil and/or emulsions onto the rollers 2 - 5 .
- the nozzle beams 9 , 10 correlated with the support rollers 4 , 5 are stationary, while the nozzle beams 7 , 8 correlated with the working rollers 2 , 3 are slidable in the direction of arrows b, c in the direction of their longitudinal axis 13 - 13 transverse to the strip running direction a across the strip width and rotatable about their longitudinal axis 13 - 13 .
- the respective supply of rolling oil and/or emulsions to the adjustable nozzle beams 7 , 8 and the stationary nozzle beams 9 , 10 is controlled with pressure control and/or quantity control and/or temperature control.
- the control of pressure, temperature, and quantity of the rolling oil, respectively, of the sprayed-on emulsions supplied to the nozzle beams 7 , 8 affects the cooling of the working rollers 2 , 3 and thus the size and the speed of the change of the effective roll barrel diameter and of the rolling gap 14 , dependant thereon, between the working rollers 2 , 3 , respectively, affects the lubrication of the working rollers.
- adaptors 17 are mounted on two hollow bearing journals 18 , 19 for rotatable and movable support of the nozzle beams about and in the direction of the longitudinal beam axis 13 - 13 .
- the bearing journals 18 , 19 are provided in the side shields 20 , 21 on the two roll housings (not illustrated) of the four-high stand 1 wherein the supply of cooling medium, respectively, of emulsions to the spray nozzles 11 mounted in the nozzle beams 7 , 8 and to the corresponding control valves 12 is realized by a supply line 22 in a side shield 20 , the hollow space 23 of the bearing journal 18 mounted in the side shield 20 , the interior space 24 of the adaptor 17 seated on the bearing journal 18 , and the distribution channel 25 of the nozzle beams 7 , 8 .
- the supply of cooling medium to the nozzle beams 7 , 8 can also be realized by a respective supply line 22 in both side shields 20 , 21 , the hollow bearing journals 18 , 19 mounted therein, the adaptors 17 seated thereon, and the distribution channel 25 of the nozzle beams.
- a rotary drive 29 is mounted on the side shields 20 , 21 , respectively, and engages a respective adaptor 17 for rotating the nozzle beams 7 , 8 about their longitudinal axis 13 - 13 .
- the connecting cables for the control valves 12 of the spray nozzles 11 of the nozzle beams 7 , 8 are combined in several flexible protective hoses 30 , wherein the length of the connecting cables of the control valves is dimensioned such that a rotation of the nozzle beams 7 , 8 about the longitudinal axis 13 - 13 of the beam is possible.
- the nozzle beams 7 , 8 can be rotated from their working position according to FIG. 3 by 180° into the maintenance position according to FIG. 4 in which the spray nozzles 11 facing away from the working rollers 2 , 3 are freely accessible.
- Maintenance and repair work on the control valves 12 of the nozzle beams 7 , 8 are expediently performed in the working position of the nozzle beams according to FIG. 3.
- the rolling strip 6 is removed from a removal hasp 31 and is guided into the rolling gap 14 via a strip introducing unit 32 , which is comprised of a first air cushion conveyor 33 , a separating blade 34 , a second air cushion conveyor 35 , a rolling unit with two deflecting rollers 36 , 37 , spaced in the strip running direction a at a spacing from one another, as well as a tension roller 39 arranged therebetween and combined with a third air cushion conveyor 38 .
- the strip introducing unit 32 is arranged on the machine frame 40 which can be advanced in the strip running direction a and returned counter to the strip running direction in the direction of arrow d.
- a positioning device 41 is arranged on the four-high stand 1 for moving two nozzle beams 7 , 8 for the lower and the upper working rollers 2 , 3 as well as a further nozzle beam 10 for the upper support roller 5 from the roller-remote maintenance position 7 a , 8 a , 10 a into the working position 7 b , 8 b , 10 b at the rollers 2 , 3 , 5 .
- the positioning device 41 is comprised of two lifting beams 43 , arranged at the inlet side of the strip on the two roll housings 42 of the four-high stand 1 and movable in the vertical direction e, f, as well as two carriages 44 movable thereon in the horizontal direction g, h and having support arms 45 with right-angle bends.
- the two nozzle beams 7 , 8 for the two working rollers 2 , 3 are fastened on the lower ends 46 of the support arms 45
- the nozzle beam 10 and a stripper 48 for the outer support roller 5 are fastened on the upper portions 47 .
- deflecting plates 49 , 50 for threading the rolling strip 6 into the rolling gap 14 are provided.
- the nozzle beam 9 for the lower support roller 4 is arranged on the machine frame 40 of the strip introducing unit 32 which is movable in the direction of arrows a, d.
- the nozzle beam 9 for the lower support roller 4 can be mounted behind the removal hasp 31 on the extended lower ends 46 of the support arms 45 of the positioning device 41 .
- control valves 12 of the spray nozzles 11 are pneumatically pilot-controlled by solenoid valves 51 .
- control valves 12 which are embodied as solenoid valves can also be used.
- the nozzle beams 7 - 10 are connected via distribution lines 52 - 54 as well as a main supply line 55 for the cooling medium with the control valve 56 for pressure and quantity control of the cooling medium to a conveying pump, not shown, of a cooling medium circulation device.
- cooling liquid is sprayed onto the working rollers 2 , 3 and support rollers 4 , 5 at these locations by means of the spray nozzles 11 . Accordingly, the effective roll barrel diameter in this area is reduced by cooling.
- the cooling medium which flows away from the rollers is collected in a collecting tank 57 below the roll stand 1 and is returned into the cooling medium circulation device.
- opening or closing of the control valves 12 of the spray nozzles 11 is carried out in a certain sequence within a time frame of, for example, one second, i.e., the individual spray nozzles 11 are switched in time intervals of approximately 26 milliseconds. The switching sequence and the time intervals are controlled by a computer 58 .
- the spray nozzles 11 positioned at identical spacing transverse to the strip running direction a in a cylindrical nozzle beam 59 of a roller cooling and lubricating device, are compact units mounted in the nozzle holders 60 which are inserted into corresponding openings 61 , 62 in the front wall section 59 a facing the roller as well as in the rear wall section 59 b of the nozzle beam 59 from the backside thereof, are sealed relative to the nozzle beam 59 , and penetrate the interior space 63 thereof.
- the spray nozzles 11 are provided with a nozzle head 64 which is threaded into a threaded bore 65 in the forward end 66 of the nozzle holder 60 facing the roller.
- the nozzle head 64 has a nozzle opening 67 and an antechamber 68 .
- the spray nozzles 11 are provided with a rotary slide valve 69 which is rotatably supported in a central throughbore 70 of the nozzle holder 60 so as to be rotatable about the longitudinal axis 71 - 71 of the spray nozzles 11 . It is sealed in the bore 70 of the nozzle holder 60 and has a blind bore 72 open toward the nozzle head 64 as well as two diametrically oppositely positioned inlet openings 73 in the area of the blind bore 72 .
- the inlet openings 73 in the open position 11 ′′ of the spray nozzles 11 according to FIG.
- the nozzle holder 60 of the spray nozzle 11 is fastened by means of a flange 76 , formed as a unitary part of the nozzle holder, to the external side of the rear wall section 59 b of the nozzle beam 59 so as to be rotatable to a limited extent about the longitudinal axis 71 - 71 of the spray nozzle 11 .
- a control member 77 for actuating the rotary slide valve 69 of the spray nozzle 11 is mounted on the fastening flange 76 of the nozzle holder 60 .
- the control member 77 may be an electric rotary solenoid, a hydraulic cylinder, or a pneumatic cylinder.
- a step motor for actuating the rotary slide valve 69 and for a simultaneous quantity control of the cooling and lubricating medium is employed.
- control members 77 for actuating the rotary slide valve 69 of the spray nozzles 11 can be arranged in a staggered arrangement in the direction of the nozzle axes 71 - 71 and/or can be arranged staggered atop one another.
- the extended spray head 64 is threaded onto the forward end 66 of the nozzle holder 60 .
- the nozzle head 64 two diametrically oppositely arranged inlet openings 74 are provided which cooperate with two inlet openings 73 in the area of the blind bore 72 , that is open toward the antechamber 68 of the nozzle head 64 , of the rotary slide valve 69 , wherein the rotary slide valve 69 is centrally supported in the antechamber 68 of the nozzle head 64 .
- the spray nozzles 11 , 79 are characterized by a fast control of the opening and closing processes which contributes to an optimal flatness control for thin strip and foil strip.
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Abstract
Description
- 1. Field of the Invention
- The invention relates to a roller cooling and/or lubricating device for cold rolling mills for strip, in particular, thin strip rolling mills and foil rolling mills, comprising nozzle beams correlated with the individual rollers and mounted on side shields of the roll housings of one or more roll stands, the nozzle beams having spray nozzles mounted therein across the width of the rollers and being adjustable relative to the correlated rollers independent from one another transverse to the running direction of the rolled strip in planes that are parallel to the strip plane, for the purpose of controlling the strip tensile stress across the strip width by a change of the effective roll barrel diameter and/or by affecting the roller lubrication with a pressure-controlled and/or quantity-controlled and/or temperature-controlled supply of rolling oil or emulsions.
- 2. Description of the Related Art
- The flatness control of the rolled strip in a cold rolling mill for strip, which is furnished with a roller cooling and/or lubricating device of the aforementioned kind known from
German patent 34 19 261 C3, is based on a change of the spray pattern of the rolling oil sprayed onto the surface of the working rollers or the sprayed-on emulsions. The change of the spray pattern is effected by an adjustment of the nozzle beam, correlated with each one of the working rollers of the rolling mill, relative to the working roller independent of the respective other nozzle beams transverse to the strip running direction in a plane which is parallel to the strip plane and a pressure-controlled and/or quantity-controlled and/or temperature-controlled supply of rolling oil or emulsions. - Thin strip and foil strip, which are rolled on a four-high or six-high roll stand with the known flatness control, are characterized by a high quality with respect to dimensional precision and shape precision as well as flatness.
- A disadvantage of roller cooling and/or lubricating devices of the aforementioned kind for cold rolling mills of strip is the insufficient accessibility of the nozzle beams with the spray nozzles and their corresponding control valves so that repair and maintenance work on the nozzle beams is cumbersome and time-consuming.
- It is an object of the present invention to optimize the control of the strip flatness in cold rolling mills for strip by means of the aforementioned roller cooling and/or lubricating device in order to compensate undesirable strip tensile stress deviations within zones in the rolled strip and to improve the accessibility of the spray nozzles, installed in the nozzle beams of the roller cooling and/or lubricating device, and of their corresponding control valves with respect to a simplification and acceleration of required repair and maintenance work.
- In accordance with the present invention, this is achieved in that:
- a) the nozzle beams are movable by means of a linear drive (adjusting cylinders) in the direction of their longitudinal axis transverse to the running direction of the rolled strip and rotatable by means of a rotary drive about the longitudinal axis;
- b) positioning devices are arranged on the roll stand or the roll stands for moving the nozzle beams from a roller-remote maintenance position into the working position at the rollers and from the working position into the maintenance position;
- c) the control valves of the spray nozzles to be opened or closed are switched in a certain time frame with time delay;
- d) the spray nozzles, which are mounted at identical spacing within the nozzle beams, have: a nozzle holder, which is inserted into corresponding openings in the front wall section facing a roller as well as the rear wall section of a nozzle beam, sealed relative to the nozzle beam, and penetrates the interior space thereof; moreover, a nozzle head, which is inserted into a bore in the forward end of the nozzle holder facing the roller, preferably is screwed into it, or which is placed onto the forward end of the nozzle holder, preferably screwed thereon, and which has at least one nozzle opening and an ante-chamber; a rotary slide valve which is supported in a central throughbore of the nozzle holder so as to be rotatable about the longitudinal axis of the spray nozzle and has a blind bore open toward the nozzle head and has in the area of the blind bore at least one inlet opening which, in the open position of the spray nozzle, is aligned with a corresponding inlet opening, open toward the interior space of the nozzle beam, of the nozzle holder or the nozzle head, and, in the closed position of the spray nozzle, is closed by a wall of the nozzle holder or the nozzle head; as well as a control member engaging the end of the rotary slide valve remote from the nozzle head.
- The roller cooling and/or lubricating device has the following advantages.
- The spray angle of the spray nozzles of the nozzle beams relative to the rollers, which is adjustable by rotating the nozzle beams about the longitudinal beam axis, provides a further parameter in addition to the adjustability of the nozzle beams relative to the respectively correlated roller transverse to the strip running direction as well as to the change of the quantity, the pressure, and the temperature of the rolling oil sprayed onto the rollers or the sprayed-on emulsions for changing the spray pattern on the roller surface within the context of a strip flatness control. The spray angle of the spray nozzles as an additional parameter makes possible an optimization of the strip flatness control. By rotating the nozzle beam by 180°, the spray nozzles can be moved in a simple way from the roller-proximal working position into a roller-remote maintenance position for a simple and fast performance of required maintenance and repair work. The positioning devices mounted on the roll stands make possible a simple movement of the nozzle beams from the working position at the rollers into a maintenance position remote therefrom in which all nozzle beams are easily accessible for repair and maintenance work. By the successive switching of the control valves of the spray nozzles to be opened or closed in a certain time frame with a time delay, the pressure in the cooling medium supply lines of the spray nozzles can be maintained substantially constant independent of the number of actuated nozzles so that liquid shocks as a result of pressure fluctuations, which can result in damage to the cooling medium lines and the control valves, are prevented. The rotary slide valve which is used for the spray nozzles of the roller cooling and/or lubricating device requires together with the control member, that, as a result of the small mass of the rotary slide valve, needs only a minimal control force, only little space so that the mounting space necessary across the strip width for each individual spray nozzle is significantly smaller in comparison to known roller cooling and/or lubricating devices, and the spray zone width of the spray nozzles is correspondingly reduced and, accordingly, the precision of the strip flatness control is significantly improved.
- The invention will be explained in the following with the aid of schematic drawings of a roller cooling and/or lubricating device used in a four-high stand.
- In the drawing:
- FIG. 1 is a perspective illustration of a four-high stand with nozzle beams for cooling and lubricating the working rollers and the support rollers;
- FIG. 2 is a front view of the nozzle beams according to FIG. 1;
- FIG. 3 is a section illustration of a rotational and sliding support of one end of a nozzle beam positioned in the working position;
- FIG. 4 is a section view of a rotational and sliding support of the nozzle beam in a maintenance position which is rotated by 180° relative to the illustration of FIG. 3;
- FIG. 5 is a four-high stand with nozzle beams in the maintenance position, a removal hasp, and devices for introducing the rolling strip into the rolling gap;
- FIG. 6 shows the four-high stand corresponding to FIG. 5 with nozzle beams in the working position;
- FIG. 7 shows the control of the spray nozzles for a four-high stand;
- FIG. 8 is a longitudinal section of a spray nozzle provided with a rotary slide valve in the closed position;
- FIG. 9 shows in an illustration corresponding to FIG. 8 the spray nozzle in the open position; and
- FIG. 10 shows an altered embodiment of the spray nozzle according to FIGS. 8 and 9.
- The four-high stand of FIG. 1 is comprised of two roll housings, not shown, in which in chocks, not shown, an upper working
roller 3 and a lower workingroller 2 as well as alower support roller 4 and anupper support roller 5 are rotatably supported. - The roller cooling and/or lubricating device, suitable for the flatness control of the rolled
strip 6, for theworking rollers support rollers nozzle beam working rollers nozzle beam support rollers - Across the width of the rollers,
spray nozzles 11 are mounted in the nozzle beams 7-10 withcontrol valves 12, arranged upstream thereof and formed as solenoid valves, for supplying cooling oil and/or emulsions onto the rollers 2-5. Thenozzle beams support rollers nozzle beams working rollers - The respective supply of rolling oil and/or emulsions to the
adjustable nozzle beams stationary nozzle beams - By a movement of the
nozzle beams strip 6 and by rotating thenozzle beams spray nozzles 11 relative to theworking rollers spray nozzles 11 onto theworking rollers spray nozzles 11 are adjusted. The control of pressure, temperature, and quantity of the rolling oil, respectively, of the sprayed-on emulsions supplied to thenozzle beams working rollers rolling gap 14, dependant thereon, between theworking rollers - By means of a flatness measuring roll, not illustrated, at the exit of the strip behind the roller set, values of the strip tensile stress distribution across the strip width of the rolled
strip 6 are measured, then processed in a computer, and used for controlling the cooling and/or the lubrication of theworking rollers rotatable nozzle beams - With a precise positioning of the
nozzle beams spray nozzles 11, which beams are moveable in the direction of the longitudinal beam axis 13-13 transverse to the strip running direction a and rotatable about the longitudinal beam axis, undesirable strip tensile stress deviations can be compensated in zones within the rolledstrip 6, and a planar strip can be produced thereby. - On the two
ends nozzle beams working rollers adaptors 17 are mounted on two hollow bearingjournals journals side shields high stand 1 wherein the supply of cooling medium, respectively, of emulsions to thespray nozzles 11 mounted in thenozzle beams corresponding control valves 12 is realized by asupply line 22 in aside shield 20, thehollow space 23 of thebearing journal 18 mounted in theside shield 20, theinterior space 24 of theadaptor 17 seated on thebearing journal 18, and thedistribution channel 25 of thenozzle beams - The supply of cooling medium to the
nozzle beams respective supply line 22 in bothside shields journals adaptors 17 seated thereon, and thedistribution channel 25 of the nozzle beams. - Hydraulic adjusting
cylinders pistons 28, acting on theadaptors 17, are arranged on the two bearingjournals nozzle beams nozzle beams rolling strip 6. - A
rotary drive 29 is mounted on theside shields respective adaptor 17 for rotating thenozzle beams - The connecting cables for the
control valves 12 of thespray nozzles 11 of thenozzle beams protective hoses 30, wherein the length of the connecting cables of the control valves is dimensioned such that a rotation of thenozzle beams - For repair and maintenance work on the
spray nozzles 11 thenozzle beams spray nozzles 11 facing away from theworking rollers control valves 12 of thenozzle beams - In deviation from the afore described embodiment of the roller cooling and/or lubricating device, there is the possibility of providing additionally a movability and rotatability of the
nozzle beams support rollers - In the four-
high stand 1 illustrated in FIGS. 5 and 6, therolling strip 6 is removed from aremoval hasp 31 and is guided into therolling gap 14 via astrip introducing unit 32, which is comprised of a firstair cushion conveyor 33, a separatingblade 34, a secondair cushion conveyor 35, a rolling unit with twodeflecting rollers tension roller 39 arranged therebetween and combined with a thirdair cushion conveyor 38. Thestrip introducing unit 32 is arranged on themachine frame 40 which can be advanced in the strip running direction a and returned counter to the strip running direction in the direction of arrow d. - A
positioning device 41 is arranged on the four-high stand 1 for moving twonozzle beams rollers further nozzle beam 10 for theupper support roller 5 from the roller-remote maintenance position 7 a, 8 a, 10 a into theworking position 7 b, 8 b, 10 b at therollers - The
positioning device 41 is comprised of twolifting beams 43, arranged at the inlet side of the strip on the tworoll housings 42 of the four-high stand 1 and movable in the vertical direction e, f, as well as twocarriages 44 movable thereon in the horizontal direction g, h and having supportarms 45 with right-angle bends. The twonozzle beams working rollers lower ends 46 of thesupport arms 45, and thenozzle beam 10 and astripper 48 for theouter support roller 5 are fastened on theupper portions 47. - Moreover, at the
lower ends 46 of thesupport arms 45 of thecarriages 44, deflectingplates rolling strip 6 into therolling gap 14 are provided. - The
nozzle beam 9 for thelower support roller 4 is arranged on themachine frame 40 of thestrip introducing unit 32 which is movable in the direction of arrows a, d. - In a rolling train with several roll stands1, starting at the second roll stand, the
nozzle beam 9 for thelower support roller 4 can be mounted behind theremoval hasp 31 on the extendedlower ends 46 of thesupport arms 45 of thepositioning device 41. - When moving the
nozzle beams maintenance position 7 a, 8 a, 10 a illustrated in FIG. 5 into the working 7 b, 8 b, 10 b according to FIG. 6, first thesupport arms 45 with thenozzle beams carriages 44 in the direction of arrow g in front of thestrip introducing unit 32; subsequently, thenozzle beams lifting beams 43 in the direction of arrow e to the working level; subsequently, thenozzle beams carriages 44 into the workingposition 7 b, 8 b, 10 b at therollers carriages 44; and then, thestrip introducing unit 32 with thenozzle beam 9 for thelower support roller 4 is advanced in the strip running direction a toward the rollers. - The movement of the nozzle beams7, 8, 10 and 9 from the working
position maintenance position - In the control, illustrated in FIG. 7, of the
spray nozzles 11 of the nozzle beams 7-10 of a four-high stand 1 correlated with the workingrollers support rollers control valves 12 of thespray nozzles 11 are pneumatically pilot-controlled bysolenoid valves 51. - Instead of the pneumatic pilot-controlled
control valves 12 for thespray nozzles 11, control valves which are embodied as solenoid valves can also be used. - The nozzle beams7-10 are connected via distribution lines 52-54 as well as a main supply line 55 for the cooling medium with the
control valve 56 for pressure and quantity control of the cooling medium to a conveying pump, not shown, of a cooling medium circulation device. - When elongate portions occur in the rolled strip, which can be determined by the flatness measuring devices, cooling liquid is sprayed onto the working
rollers support rollers spray nozzles 11. Accordingly, the effective roll barrel diameter in this area is reduced by cooling. The cooling medium which flows away from the rollers is collected in acollecting tank 57 below theroll stand 1 and is returned into the cooling medium circulation device. opening or closing of thecontrol valves 12 of thespray nozzles 11, for example, there may be 40 of them provided, is carried out in a certain sequence within a time frame of, for example, one second, i.e., theindividual spray nozzles 11 are switched in time intervals of approximately 26 milliseconds. The switching sequence and the time intervals are controlled by acomputer 58. - With such a control, a change of the liquid flows is achieved wherein pressure fluctuations can be prevented by means of a fast pressure control so that the flow-through quantity per control valve remains constant and no damaging liquid shocks can occur.
- According to FIGS. 8 and 9, the
spray nozzles 11, positioned at identical spacing transverse to the strip running direction a in acylindrical nozzle beam 59 of a roller cooling and lubricating device, are compact units mounted in thenozzle holders 60 which are inserted into correspondingopenings front wall section 59 a facing the roller as well as in therear wall section 59 b of thenozzle beam 59 from the backside thereof, are sealed relative to thenozzle beam 59, and penetrate theinterior space 63 thereof. - The spray nozzles11 are provided with a
nozzle head 64 which is threaded into a threadedbore 65 in theforward end 66 of thenozzle holder 60 facing the roller. Thenozzle head 64 has anozzle opening 67 and anantechamber 68. - Moreover, the
spray nozzles 11 are provided with arotary slide valve 69 which is rotatably supported in acentral throughbore 70 of thenozzle holder 60 so as to be rotatable about the longitudinal axis 71-71 of thespray nozzles 11. It is sealed in thebore 70 of thenozzle holder 60 and has ablind bore 72 open toward thenozzle head 64 as well as two diametrically oppositely positionedinlet openings 73 in the area of theblind bore 72. Theinlet openings 73, in theopen position 11″ of thespray nozzles 11 according to FIG. 9, are aligned with twoinlet openings 74 in thenozzle holder 60, which are open to the interior 63 of thenozzle beam 59, and, in theclosed position 11′ of thespray nozzle 11 illustrated in FIG. 8, are closed by thewall 75 of thenozzle holder 60. - The
nozzle holder 60 of thespray nozzle 11 is fastened by means of aflange 76, formed as a unitary part of the nozzle holder, to the external side of therear wall section 59 b of thenozzle beam 59 so as to be rotatable to a limited extent about the longitudinal axis 71-71 of thespray nozzle 11. - A
control member 77 for actuating therotary slide valve 69 of thespray nozzle 11 is mounted on thefastening flange 76 of thenozzle holder 60. Thecontrol member 77 may be an electric rotary solenoid, a hydraulic cylinder, or a pneumatic cylinder. Moreover, there is the possibility of employing a step motor for actuating therotary slide valve 69 and for a simultaneous quantity control of the cooling and lubricating medium. - With respect to a spacing of the
spray nozzle 11 as small as possible across thewidth 78 of the rollingstrip 6, thecontrol members 77 for actuating therotary slide valve 69 of thespray nozzles 11 can be arranged in a staggered arrangement in the direction of the nozzle axes 71-71 and/or can be arranged staggered atop one another. - Moreover, there is the possibility of providing a rotary adjustment of the
nozzle holders 60 in thenozzle beam 59 for changing the spray pattern of the individual spray nozzles, wherein a rotary drive for eachnozzle holder 60 or a common rotary drive for several nozzle holders can be used. - In the further embodiment illustrated in FIG. 10 of a
spray nozzle 79 withrotary slide valve 69, theextended spray head 64 is threaded onto theforward end 66 of thenozzle holder 60. In thenozzle head 64 two diametrically oppositely arrangedinlet openings 74 are provided which cooperate with twoinlet openings 73 in the area of the blind bore 72, that is open toward theantechamber 68 of thenozzle head 64, of therotary slide valve 69, wherein therotary slide valve 69 is centrally supported in theantechamber 68 of thenozzle head 64. - As a result of the small rotary stroke of the
rotary slide valve 69, thespray nozzles - While specific embodiments of the invention have been shown and described in detail to illustrate the inventive principles, it will be understood that the invention may be embodied otherwise without departing from such principles.
Claims (8)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20006508.4 | 2000-04-08 | ||
DE20006508U DE20006508U1 (en) | 2000-04-08 | 2000-04-08 | Roller cooling and / or lubricating device for cold strip rolling mills, in particular fine strip and foil rolling mills |
DE20006508U | 2000-04-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010027672A1 true US20010027672A1 (en) | 2001-10-11 |
US6450000B2 US6450000B2 (en) | 2002-09-17 |
Family
ID=7940005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/827,704 Expired - Lifetime US6450000B2 (en) | 2000-04-08 | 2001-04-06 | Roller cooling and lubricating device for cold rolling mills such as thin strip and foil rolling mills |
Country Status (4)
Country | Link |
---|---|
US (1) | US6450000B2 (en) |
EP (1) | EP1142652B1 (en) |
JP (1) | JP2001347307A (en) |
DE (2) | DE20006508U1 (en) |
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GB8514598D0 (en) * | 1985-06-10 | 1985-07-10 | Davy Mckee Poole | Lubrication of rolling mills |
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DE9418359U1 (en) * | 1994-11-17 | 1995-01-12 | Achenbach Buschhuetten Gmbh | Roll cooling and / or lubricating device for cold strip rolling mills, especially fine strip rolling mills |
DE19503544A1 (en) * | 1995-02-03 | 1996-08-08 | Achenbach Buschhuetten Gmbh | Roll cooling and/or lubricating appts. for cold-rolling |
-
2000
- 2000-04-08 DE DE20006508U patent/DE20006508U1/en not_active Expired - Lifetime
-
2001
- 2001-03-24 DE DE50106935T patent/DE50106935D1/en not_active Expired - Lifetime
- 2001-03-24 EP EP01107352A patent/EP1142652B1/en not_active Expired - Lifetime
- 2001-04-05 JP JP2001107113A patent/JP2001347307A/en not_active Withdrawn
- 2001-04-06 US US09/827,704 patent/US6450000B2/en not_active Expired - Lifetime
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CN115846112A (en) * | 2022-12-23 | 2023-03-28 | 佛山市南海区佳朗卫生用品有限公司 | Glue spraying mechanism for paper diaper, glue spraying composite device and use method |
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Also Published As
Publication number | Publication date |
---|---|
DE50106935D1 (en) | 2005-09-08 |
EP1142652A3 (en) | 2004-01-02 |
EP1142652B1 (en) | 2005-08-03 |
EP1142652A2 (en) | 2001-10-10 |
JP2001347307A (en) | 2001-12-18 |
DE20006508U1 (en) | 2000-08-31 |
US6450000B2 (en) | 2002-09-17 |
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