CN113546968B - Device for cooling or guiding elongated products - Google Patents
Device for cooling or guiding elongated products Download PDFInfo
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- CN113546968B CN113546968B CN202110441643.XA CN202110441643A CN113546968B CN 113546968 B CN113546968 B CN 113546968B CN 202110441643 A CN202110441643 A CN 202110441643A CN 113546968 B CN113546968 B CN 113546968B
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- cooling
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- shaft
- elongated product
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- 238000001816 cooling Methods 0.000 title claims abstract description 114
- 239000000047 product Substances 0.000 description 134
- 230000002093 peripheral effect Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000003754 machining Methods 0.000 description 8
- 239000000969 carrier Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 239000000314 lubricant Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
Classifications
-
- 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
- B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
-
- 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
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
- B21B39/165—Guides or guide rollers for rods, bars, rounds, tubes ; Aligning guides
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C9/00—Cooling, heating or lubricating drawing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The application relates to a device for cooling or guiding an elongated product, comprising a plurality of guide sections, at least one of which is designed as a bypass section and at least one as a cooling section. The guide segments are jointly movable such that each of the guide segments may be optionally arranged in alignment with a processing line.
Description
Technical Field
The present application relates to a device for cooling or guiding an elongated product.
Background
So-called cooling sections are used in the rolling of hot metal rods, wires and tubes. These cooling sections are used to have a targeted effect on the structure of the metal by cooling the hot rolled product. Such cooling sections are arranged in the rolling mill at different positions in front of or behind the individual rolling stands of the rolling mill train and are usually formed by water tanks and connected compensating sections. The water tank is used for cooling the elongated product. The cooling is carried out by cooling the surface of the rolled product, so that a compensating section is usually arranged after the water tank for compensating the surface temperature with the internal temperature of the product.
An elongated product in the present disclosure refers to a metal semifinished product of constant cross-sectional length made by rolling, drawing or forging, which is not a flat product, because its length is much greater than its thickness and width. Particularly to bars, wires, pipes and profiles.
A processing line or pass line in the present disclosure refers to a certain substantially straight line segment or a substantially straight line segment along which an elongated product can be moved in a processing device.
In order to obtain an optimal cooling effect, it is important to match the cooling section with the elongated product to be cooled.In the cooling section, a plurality of annular cooling devices (e.g. cooling nozzles) and one or more wiper nozzles are usually arranged coaxially one after the other, through which the hot rolled material passes centrally. A certain amount of water is injected through the annular gap in these cooling nozzles to completely fill the cooling tube. The water level is usually 50m 3 And/h. It is important that the rolled stock is guided as centrally as possible in the cooling tube in order to obtain a uniform cooling effect over the peripheral extent of the rolled stock.
Another important point is that the annular gap between the rolled stock and the cooling tube, which is filled with coolant, does not exceed or fall below a certain dimension. In view of this, it is necessary to use a plurality of cooling devices having different inner diameters, which are each adapted to a different cross section of the rolled material. For example, three different cooling tube diameters are required to cover product lines of rolled stock ranging from 20mm to 100mm in diameter.
It has turned out that a plurality of cooling sections, each adapted to a cross section of a rolled stock, can be provided to be exchangeable in order to quickly insert or remove the product into or from the processing line when it is exchanged. Product changes may be performed several times a day, and thus the speed of such a change operation is critical to the efficiency of the mill train, since during this time the mill train must be shut down, resulting in production stoppages.
Due to the different demands placed on the products, the full product range of the hot in-line process is not always implemented in the hot rolling mill train for long products. In order to meet these requirements in a mill train for long products, it may be necessary to guide the rolled stock through a bypass roll table instead of a cooling tube. In this case, the elongated product is not actively cooled by the cooling section, for example, the elongated product is kept at a substantially high temperature on its way to the next processing station.
In this case, it is in principle possible to guide the hot elongated product through a certain cooling section, to which no coolant is fed, so that no active cooling takes place in the cooling section. However, the above solution is by no means advantageous, since the devices of the cooling section are heated by the heat radiation of the elongated product, which shortens the service life. Furthermore, since the hot elongated product is surrounded by cooling means, the natural heat dissipation of the elongated product is suppressed, which is generally detrimental as well.
In this context, so-called bypass roller tables are provided, which have rollers for transporting the long products, but no cooling device. These bypass roller tables may be arranged in the processing line instead of in the cooling section. In these bypass tables, the elongated product is not actively cooled, but is simply guided and driven through the rollers. Such bypass roller ways can be exposed in particular on multiple sides, thereby facilitating natural heat dissipation of the elongated product by heat radiation or convection.
A common construction in the prior art is provided with a plurality of cooling sections which are arranged parallel to one another on a translatably displaceable carriage, so that they can be arranged optionally in a processing line by displacement of the carriage. A bypass roller table parallel to the cooling section can also be arranged. In the case of a rolled stock which is not guided through one of the cooling sections, the carriage can be moved in such a way that the cooling section is removed from the processing line and the bypass roller table is pushed into the processing line.
However, this design has the disadvantage that the carriage which can be moved at the bottom has a high space requirement.
In the prior art, it is disclosed, for example, in documents EP 2 707,156 B1 and DE 38 85,235 T2: the plurality of cooling segments are arranged in a rotor in such a way that each of the cooling segments is arranged in the processing line. But these known devices do not allow to guide the rolled product past the cooling section. For the reasons described above, merely "threading" the rolled product through it without cooling by a closed cooling section in the apparatus is not desirable. In other words, the water panels cannot be bypassed ("bypassen") as desired herein.
The cooling section differs from the bypass roller table in terms of the requirements for guiding and driving the elongated product: in the cooling section it is necessary to position the elongated products relatively accurately in the horizontal and vertical direction, whereas on the bypass roller table the space guidance requirements for the elongated products are relatively low, so that only a simpler, low-wear and inexpensive construction is required for guiding and transporting the elongated products.
V-notched rollers facilitate guiding in the cooling section, which rollers can be used to position the passing rolled product in the vertical and horizontal directions through their notches. In the bypass roller way, however, it is sufficient that the rollers are substantially only shaped to support the elongated product from below.
At the same time, in the case of guide rollers in the bypass roller table, these rollers may not only need to be guided but also driven in order to better transport the rolled stock in the bypass roller table. The bypass roller table should also be able to deliver non-circular cross sections, such as square, flat or hexagonal profiles. For the above reasons, and since there is no need to precisely guide the rolled stock sideways, driven flat rollers are often applied to bypass roller tables. These flat rollers have an easily definable support surface for the elongated product, so that the conveying speed of the rolled product can be determined directly from the peripheral speed of the support surface.
In the case of V-notched rolls, it is difficult to determine the exact bearing surface of the rolled product on the rolls, since this is in particular related to the diameter of the rolled product or its orientation. The conveying speed of the rolled product cannot be determined directly from the rotational speed of the rollers. The decisive peripheral roller speed is related to the point where the roller contacts the rolled stock ("drive diameter"). This drive diameter is in turn related to the cross section of the rolled stock, in particular to the diameter of the rolled stock: the thicker material is located on the outside of the roller, where there is a higher circumferential speed for a given angular speed; the thinner material is located on the inside on the roller, wherein there is a lower peripheral speed for a given angular speed. If the V-roller is driven at a fixed angular velocity (e.g., in revolutions per minute), this can be related to the thickness of the rolled product, causing relative movement between the roller bearing surface and the traveling rolled product due to the thickness-related bearing surface and the peripheral roller velocity (e.g., in meters per second), thereby causing scratches or other damage to the surface of the rolled product. In view of this, for applications with different rolled stock cross sections and rolled stock speeds, V-notched rollers need to be set so that their rotational speeds can be matched to the travelling rolled stock.
Disclosure of Invention
In view of this, it is an object of the present application to provide a compact device for cooling and guiding elongated products, in which device the cooling sections in the processing line can be quickly replaced with bypass roller tables when product changes are carried out, and vice versa.
According to a first aspect of the application, a device for cooling or guiding an elongated product is provided, which device has a plurality of guide sections, at least one of which is designed as a bypass section and at least one as a cooling section. The guide segments are jointly movable such that each of the guide segments may be optionally arranged in alignment with a processing line. The guide segments are arranged on a rotor rotatable at 360 ° about a rotor axis and each of the guide segments can be arranged in a selectable alignment with the machining line by rotation of the rotor.
Preferably, the rotor may be rotated more than 360 °, i.e. more than one complete revolution.
The bypass section in this case refers to a guide section through which the elongated product passes by the cooling section without heat treatment. Normal cooling of hot elongated products, such as by natural convection or heat radiation, is not "heat treatment" herein.
With the above arrangement, it is possible to quickly switch between different cooling sections or between one cooling section and one bypass roller table by: the guide segments are jointly movable such that each of the guide segments may be optionally arranged in alignment with a processing line. This arrangement makes it possible in particular to bypass the cooling section by arranging a bypass roller table in the processing line.
The term "rotor" in this context means a device which is designed to be rotatable about a rotor axis. In particular, the rotor can be rotated 360 ° about its rotor axis. Preferably, the rotor may be rotated more than 360 ° about its rotor axis.
As an alternative to being arranged on a rotor, according to a second aspect of the application, the guide segments are arranged on a linearly vertically movable actuator, wherein each of the guide segments can be arranged in selectable alignment with the processing line by a vertical movement of the actuator.
The term "actuator" as used herein refers to a device that is designed to move along a linear axis. In this case, the linear axis is arranged in particular vertically, wherein the term "vertical" does not strictly mean parallel to the direction of gravity, but rather that the path of movement of the guide segments has a certain vertical component, which serves to adjust the height of the respective guide segments relative to the processing line. The actuator can thus be understood as an "elevator" which serves to arrange the different guide sections optionally in the processing line. Furthermore, the guide section can be arranged precisely at the level of the processing line by means of the vertical movement component.
As an alternative to being arranged on a rotor or an actuator, according to a third aspect of the application, the guide segments are arranged along a circumferential carrier, wherein each of the guide segments can be arranged in alignment with the processing line by a further movement of the carrier in a circumferential direction.
The term "endless carrier" as used herein refers to a device designed to move along a defined closed path as an endless conveyor. For the purpose of continuing comparison with an elevator in the sense of "actuator", the endless carrier can be similarly understood as a "endless machine" which serves to arrange the different guide sections optionally in the endless carrier by further movement in the endless direction. The encircling carrier differs from the above-described actuator, for example, in that the selected guide sections are arranged in the processing line by a back-and-forth movement on the actuator, whereas the encircling carrier only requires one direction of movement due to its curved (e.g. ring-shaped closed) path. This can for example serve to simplify the construction, since such a device only has to be designed to assist in the movement in one direction.
In the case where the elongated product should pass through the cooling zone region uncooled, a device according to one of the above aspects can be employed to rotate or arrange the bypass roller table (instead of the cooling zone) into the process line or the pass line.
The usual dimensions of fully assembled rotors are 7 m long by 5 ton heavy, and the structural costs required for turning or rotating movements or linear movements are therefore high. Without the preferred rotor having to be moved from its operating position.
In this respect, the preferred arrangement of the guide sections on the rotor or on the vertically movable actuator enables the cooling sections to be arranged in a space-saving manner, in particular in comparison with a linear arrangement or a linear horizontal arrangement. Furthermore, the energy requirement for changing the guide segments in the machining line is smaller when using a rotor than when using a linear arrangement, since only one torque has to be applied to the rotor to align one of the guide segments with the machining line. This torque can be reduced, for example, by rotor balancing, so that it is minimized and in particular is much smaller than the corresponding force applied for displacing the guide section.
Preferably, the bypass section is a bypass roller way.
Compared with the bypass section without the roller, the roller way type technical scheme has the advantage that the roller can be driven in the bypass roller way, so that long products are transported.
Preferably, the bypass section is constructed as an exposed guide, further preferably the bypass section is exposed on at least one side, particularly preferably on the top side, further preferably on the top side and laterally, in order to facilitate the thermal cooling of the elongated product.
The exposed guide is capable of cooling the elongated product on the bypass section by convection and heat radiation. This is further enhanced by the exposed solution on at least one side, in particular on the top side or on both the top side and the side.
According to another aspect of the present application there is provided a guide device for an elongate product, wherein the guide device has a shaft driven and rotatably supported about a shaft axis and a first roller for guiding and/or driving the elongate product, the first roller being rotatably supported on the shaft.
Rotatably supported on the shaft means herein that the first roller is rotatable relative to the shaft and about the shaft axis.
A shaft is generally referred to (herein, vice versa) some kind of cylindrical element for transmitting rotational motion and torque and designed to absorb torque.
By rotatably supporting the first roller on the shaft, the roller can be driven by the rotation of the shaft at a given shaft angular velocity in idling to a roller angular velocity corresponding to the shaft angular velocity. By "idle" herein is meant that no elongated product is in contact with the roller. In this case, the friction between the shaft and the roller is sufficient to drive the roller to an angular velocity substantially corresponding to the angular velocity of the shaft.
In this way, for example, the first roller can be driven at an angular velocity which can be determined in advance such that the angular velocity of the roller is set to a circumferential velocity over the driving circumferential radius for a certain cross section of the elongated product, which corresponds to the velocity with which the elongated product is driven externally onto the roller. "drive circumferential radius" herein refers to the circumferential radius at which an elongated product contacts the roller surface at a particular cross-section. As previously mentioned, this circumferential radius may vary depending on the cross-sectional profile of the elongated product, depending on the specific embodiment of the first roller.
This causes, on the one hand, the following: the relative speeds between the roller surface and the elongated product can be matched to each other by: the speed of the first roller in idle is set in the manner described above. On the other hand, the rotatable support on the rotatable shaft also causes the following: as the elongated product comes into contact with the roller, the angular velocity of the roller and the shaft may be decoupled from each other, such that, for example, the shaft may rotate faster or slower than the roller. Thereby minimizing damage to the surface of the elongated product caused by the relative velocity between the roller surface and the surface of the elongated product.
Preferably, the guide device further has a second roller for guiding and/or driving the elongated product, which is mounted on the shaft in a rotationally fixed manner.
Anti-torque in this context means that the second roller cannot rotate relative to the drive shaft about the shaft axis.
By arranging the second roller on the axle body, the guide means can be applied to two guide sections having different requirements for the roller, such as a cooling section especially for the first roller and a bypass section especially for the second roller.
The second roller can be used as a drive roller by means of a second roller which is mounted in a rotationally fixed manner. The second roller is mounted on the shaft in a rotationally fixed manner, so that a high torque can be transmitted from the shaft to the elongated product as a driving force by means of the roller, wherein, unlike the first roller, the peripheral speed of the second roller in the driving diameter is dependent only on the angular speed of the shaft and acts as a forward speed for driving the elongated product to the peripheral speed resulting therefrom and resulting from the driving diameter.
Preferably, the first roller and the second roller are arranged on the same side of the shaft body as the bearing of the supporting shaft body, i.e. the bearing is not located between the two rollers.
Preferably, the first roller is a notched roller.
The notched roller of the present application refers to a roller that is not generally cylindrical in shape, but rather generally hourglass in shape. In other words, the peripheral surface of the roller is not continuously parallel to the roller axis like a cylinder, but is V-shaped tapered from the outer end of the roller toward the center. That is, the roller has a smaller diameter at its center relative to the shaft axis than at the roller lateral section relative to the shaft axis. The specific configuration of the rim forming the recess is not limited and may be, for example, straight or curved.
In the case of long products guided by the cooling section, the precise positioning of the long products in the center of the cooling device of the cooling section is of particular importance for a uniform temperature distribution in the long products. The function of the notched rollers is to guide the elongated product horizontally and vertically through the notches.
The disadvantage of V-notched rollers is that the drive diameter is related to the cross-sectional profile of the elongated product, see above: the specific orientation of the elongated product with respect to the axis of the shaft, i.e. in particular the supporting radius, is influenced by the cross-sectional configuration and the thickness of the elongated product. For example, in the case of a rounded cross-sectional profile, a larger diameter elongated product is farther from the roller axis on the notched roller than a smaller diameter elongated product, and thus a larger diameter rounded cross-sectional profile will contact the roller surface on a larger drive roller diameter than a smaller diameter rounded cross-sectional profile.
To take this effect into account, V-notched rollers are rotatably arranged on the driven shaft. The advantage of this solution is that, even in the event of an incorrect choice of the angular speed of the shaft, the notched roller can accelerate or decelerate to match the speed of the elongated product once it has moved onto the V-shaped notched first roller. The advantage of driving the shaft bearing the V-notched first roller is that the V-notched first roller reaches substantially the correct rotational speed before the elongated product moves onto the roller, i.e. in particular before an elongated product is located in the cooling section and a new elongated product moves onto the cooling section. This minimizes the speed differential between the elongated product and the first roller and thereby minimizes the risk of damage occurring to the surface of the elongated product.
Preferably, the second roller is a flat roller.
The term "flat roller" refers to a roller having a bearing surface that is at least partially cylindrical. In addition to the cylindrical bearing surface, the flat roller may also have lateral guides to prevent the elongated product from being offset in the (cylindrical) axial direction.
Undriven V-rolls are not suitable for bypass roller ways. On the one hand, the rollers should be driven in order to actively transport the elongated products in the bypass roller table, but no high precision as in the cooling section is required for positioning the elongated products.
In addition, the following frequently occurs: it is desirable to transport non-circular cross-sections, such as square, flat and hexagonal cross-sectional profiles, on bypass roller tables. This is achieved very simply by using a flat roller which can be used in the bypass roller way, since no precise lateral guidance is required in the roller way. The flat roller is preferably used for driving in the bypass roller bed, since it is capable of driving a plurality of different cross-sectional profiles along the bypass roller bed.
Preferably, the shaft is movable along a shaft axis.
The shaft axis is generally perpendicular to the machining line. The machining line is generally fixed in position so that one of the rollers on the axis of the shaft can be pushed into or removed from the area of the machining line by moving the shaft in an orientation along the axis of the shaft.
In the case where both the first and second rollers are mounted on the shaft, this mobility allows for the first roller or the second roller to be optionally disposed in the region of the processing line.
Preferably, the first roller is supported on the shaft by means of a lubricant support.
An advantage of a lubricant support, such as a fat support, is that a certain torque can be transferred to the first roller via the lubricant during idling in order to accelerate the first roller during idling to an angular velocity substantially corresponding to the angular velocity of the shaft. At the same time, with the lubricant support, the torque transmitted from the shaft to the first roller is sufficiently small that the angular velocity of the first roller is not severely affected by the angular velocity of the shaft in the event that there is contact between the elongated product and the first roller. This prevents the surface of the elongated product from being damaged by the relative movement between the surface of the first roller and the elongated product.
Preferably, the first roller is mounted on the shaft in such a way that sliding between the shaft and the first roller is possible.
Sliding in this context refers to the following case: the rollers are supported on the one hand in principle in such a way that the relevant torque is transmitted from the shaft to the rollers, but on the other hand in such a way that an angular velocity difference between the shaft and the first roller is allowed, which exceeds the physically necessary range (e.g. the play of the rollers on the shaft).
Preferably, the shaft is supported on a height-adjustable carrier.
The height-adjustable carrier can realize the movement of the bearing point of the shaft body along the vertical direction, thereby being beneficial to the accurate positioning of the long product.
An important point in achieving an optimal structure in the elongated product is that the temperature distribution in the circumferential direction of the elongated product is uniform after the elongated product has left the cooling section. In the systems known today, streak formation often occurs on the periphery of the elongated product, which is caused by uneven cooling in the cooling section. This effect may occur in the case of an elongated product that is not guided centrally in the cooling section. To avoid such streaking, the elongated product must be guided in the center of the cooling tube with millimeter level positional accuracy. This can be achieved by arranging the shaft body on a carrier which is height-adjustable. This makes it possible to guide the elongated product centrally in the cooling section in a manner independent of the orientation of the cooling section and independent of the configuration of the processing line, so that a uniform cooling result is obtained at the periphery of the elongated product.
Preferably, the shaft is supported on a carrier that is movable along the shaft axis.
Such a carrier that is movable along the shaft axis enables the shaft to be moved along the shaft axis and optionally enables the first roller or the second roller to be arranged in the processing line or the shaft to be pulled out of the processing line, for example, when changing the guide section.
The height-adjustable carrier and the carrier movable along the axis of the drive shaft body may also be the same carrier.
Preferably, the shaft axis extends perpendicular to the direction of passage of the elongated product.
Firstly, this arrangement enables the rollers arranged on the shaft to be extended into or removed from the processing line along the shaft axis. Secondly, the first and second rollers have a preferred solution as rotationally symmetrical bodies, so that an arrangement of the shaft axis and the roller axis perpendicular to the passing direction minimizes friction between the rollers and the elongated product.
According to another aspect of the application, there is provided a method of guiding an elongated product, the method comprising driving a shaft of the aforementioned guiding device at an angular velocity w and feeding the elongated product to a first roller at a feed velocity v.
In the process, the long product is contacted with the first roller by abutting the long product to the first roller at a distance r from the center of the first roller, and the circumferential speed u1 of the first roller on the abutting front radius r of the long product passes through the following equation
u1(r,w)＝2π·r·w
And is given.
Further, the peripheral speed u2 (r) of the first roller on the abutment rear radius r of the elongated product is calculated by the following equation
u2(r)＝v
And is given.
This allows the first roller to be driven to an estimated speed before the abutment of the elongated product, which can then be matched to the speed of the elongated product after the abutment of the elongated product, since the roller is rotatably supported on the shaft.
Preferably, the angular velocity w of the elongated product against the front shaft is set such that:
|u1-u2|≤∈
where e is small and where the setting is preferably based on an estimation of the radius r. It is particularly preferred that the radius r is estimated based on the size, in particular the diameter, of the cross-section of the elongated product.
Preferably, e is small, ideally even zero. The effect of minimizing epsilon is that the relative speed between the first roller and the elongated product before abutment is zero, thus reducing the effect of the relative speed on the surface.
Further advantages and improvements of the application are described below with reference to the drawings and the entire claims.
Drawings
Fig. 1 is a prior art water tank.
Fig. 2 is a rotor in an embodiment of the application.
Fig. 3 is a rotor with a guide device in one embodiment of the application.
Fig. 4 and 5 are detailed views of the guide.
Fig. 6 shows an arrangement of a plurality of guide devices on a carrier.
Fig. 7 is a surrounding carrier with a guide in another embodiment of the application.
Detailed Description
Fig. 1 shows a prior art device for cooling and/or guiding an elongated product, which has a plurality of guide sections, which can be designed either as cooling sections 1-4-1, 1-4-2, 1-4-3 or as bypass sections 1-5. The cooling sections 1-4-1, 1-4-2, 1-4-3 differ in that they are designed to cool elongated products each having a different cross-sectional profile. The water tank 1-1 is arranged on the rails 12, 14 in a movable manner in a first direction. By means of a movement in the first direction, one of the cooling sections 1-4-1, 1-4-2, 1-4-3 or the bypass section 1-5 can be optionally aligned with a processing line (not shown). Such a processing line is configured such that it has an inlet for the elongated product and an outlet for the elongated product, which are aligned with each other and spaced apart in the direction of passage of the elongated product such that corresponding guide sections are arranged in alignment therebetween in order to feed the elongated product in the direction of passage from the inlet on the feed side 11 into the guide sections and from the guide sections into the outlet on the discharge side 13.
This solution creates a great space requirement for moving the guide section in the first direction.
Fig. 2 shows a rotor 3-1 according to an embodiment of the present application.
The rotor 3-1 has a plurality of guide sections 32, 34, 36, 38, of which three are embodied as cooling sections 32, 34, 36 in the embodiment shown, and one guide section is embodied as bypass section 38. In other words, in the embodiment shown, at least one guide section 38 on the rotor 3-1 shown is designed as a bypass section, while the remaining guide sections 32, 34, 36 are designed as cooling sections.
The rotor 3-1 is rotatably supported around the rotor shaft 40. In the embodiment shown, the guide sections 32, 34, 36, 38 are parallel to each other and to the rotor shaft. In the illustrated embodiment, the rotor shaft 40 is parallel to the passing direction, but this solution is not essential. For example, in the case of guide sections 32, 34, 36, 38 arranged like the objective turret (Objektiv-Revolver) of a microscope, rotor shaft 40 may also be angled with respect to the direction of passage.
The guide sections 32, 34, 36, 38 are arranged such that they can be moved together by rotation of the rotor 3-1 about the rotor shaft 40 and can optionally be arranged in alignment with a machining line. This is especially the case: the centers of the guide segments 32, 34, 36 and 38 are substantially equidistant from the rotor shaft in the radial direction of the rotor 3-1.
In the case of a rotor with only three guide sections, of which for example two are designed as cooling sections and one is designed as a bypass section, the rotor can also be designed as a "triangle".
Fig. 3 shows a rotor 3-1 with a guiding device 60 according to an embodiment of the application.
The rotor 3-1 is substantially identical to the rotor 3-1 described in fig. 2.
In the embodiment shown in fig. 3, a plurality of guide means 60 are arranged beside the rotor 3-1, i.e. outside the guide sections 32, 34, 36, 38 with respect to the radial direction of the rotor 3-1.
Fig. 4 and 5 are detailed views of the guide 60. The guide device 60 in the embodiment shown has a shaft body 11-5 which is driven by a drive device 11-4 and is rotatably supported in a bearing 11-3 about a shaft body axis 62. The guide device also has a first roller 11-1 for guiding and/or driving the elongated product, which is rotatably supported on the shaft 11-5. In the illustrated embodiment, the first roller 11-1 is rotatably supported on the shaft body 11-5 by means of two ball bearings 12-2, but the present application is not limited to such a supporting scheme. The first roller 11-1 can be rotated relative to the shaft 11-5 by the support 12-2.
The roller 11-1 refers to a notched roller, that is, the first roller 11-1 is a rotationally symmetrical body with a diameter at its center smaller than the diameter of the edge. In other words, the first roller 11-1 is a rotationally symmetrical body having a V-shaped recess. Stated another way, the outer surface of the first roller 11-1 is some rotationally symmetrical body that is created by: the two truncated cones are abutted together with their top surfaces.
With this shape, the first roller 11-1 is able to center a plurality of different elongated product geometries along the shaft axis. Given the roller geometry of the first roller 11-1, the orientation of the elongated product in the vertical direction can be defined by the cross-sectional profile of the elongated product, in particular by the diameter.
The guide device further has a second roller 11-2 which is mounted on the shaft body 11-5 in a rotationally fixed manner, so that the second roller 11-2 rotates together with the rotation of the shaft body 11-5. In the embodiment shown, the second roller 11-2 is constructed as a flat roller, i.e. the roller 11-2 has a substantially cylindrical bearing surface 64. The second roller 11-2 may also have lateral guides 66 to prevent lateral, i.e., along the shaft axis 62, shifting of the elongated product.
The first roller 11-1 and the second roller 11-2 are disposed on the same side of the shaft body 11-5 with respect to the bearing 11-3 supporting the shaft body 11-5. In addition, the first roller 11-1 and the second roller 11-2 cannot move along the axis of the drive shaft body relative to the drive shaft body.
Fig. 6 shows an arrangement of a plurality of guide devices 60 on a carrier 13-1. The carrier 13-1 is movable in a horizontal direction 13-3 and in a vertical direction 13-4. The horizontal direction 13-3 is parallel to the shaft axis 62 and the vertical direction 13-4 is perpendicular to the horizontal direction 13-3 and to the rotor shaft 40. By the movement of the carrier 13-1, the guide 60 arranged thereon is also moved. By means of the movement in the vertical direction 13-4, the height adjustment of the elongated product guided on the guide 60 can be made. By means of the movement in the horizontal direction 13-3, the guiding means can be moved, whereby the first roller 11-1 or the second roller 11-2 can be optionally arranged in the processing line. Furthermore, the guide 60 can also be moved away from the rotor 3-1 by a movement in the horizontal direction 13-3, so that the rotor is not hindered by the guide 60 during rotation about the rotor shaft 40.
Reference is made again to fig. 3. The guide sections 32, 34, 36, 38 are designed in such a way that they each have grooves 70, 72, through which the rollers 11-1, 11-2 of the guide 60 can be pushed into the respective guide section 32, 34, 36, 38.
In particular, with the cooling sections 32, 34, 36 arranged in the processing line, the guide device 60 is pushed in the horizontal direction 13-3 towards the rotor shaft 40, so that the first roller 11-1 is arranged in the processing line for laterally guiding the passing elongated product in the cooling sections 32, 34, 36.
With the bypass section 38 arranged in the processing line, the guide 60 is pushed forward in the horizontal direction 13-3 towards the rotor shaft 40, so that the second roller 11-2 is arranged in the processing line for driving the passing elongated product in the bypass section 38.
Before the rotor 3-1 is rotated so that another one of the guide segments 32, 34, 36, 38 is arranged in the processing line, the guide 60 is moved away from the rotor shaft 40 in the horizontal direction 13-3 by means of the carrier 13-1 so that the rotor can rotate freely.
In the event of the rotor 3-1 reaching the desired position, the guide 60 is pushed back into the corresponding operating position along the rotor shaft by means of the carrier 13-1 in the manner described above. The line segment around which the guide 60 is moved to the working position is dependent on the intended use of the guide 60 and the type of guide segments 32, 34, 36, 38: when the guide sections refer to the cooling sections 32, 34, 36, the guide 60 extends into the processing line in such a way that the passing elongated product is carried on the first roller 11-1 dedicated to the cooling section; when the guide section is referred to as the bypass section 38, the guide 60 extends into the processing line in such a way that the passing elongated product is carried on the second roller 11-2 dedicated to the bypass section.
In the case where one of the cooling sections 32, 34 or 36 is disposed in the processing line, the shaft body 11-5 may be driven by the driving device 11-4 such that the first roller 11-1 rotates at an angular velocity substantially equal to that of the shaft body 11-5 in idling. This angular velocity can be adjusted by: the traveling speed of the elongated product is estimated and the driving diameter of the first roller 11-1 is estimated from the elongated product cross section. Based on these values, the angular velocity of the shaft 11-5 is defined so as to keep the relative velocity between the drive diameter and the roller 11-1 on the elongated product as low as possible. In the case of the elongated product traveling on the first roller 11-1, the elongated product driving the first roller 11-1 in diameter has a certain angular velocity, which corresponds to the traveling velocity of the elongated product. The first roller 11-1 is rotatably mounted on the shaft 11-5, so that the first roller 11-1 can adjust its circumferential speed in terms of the driving diameter according to the speed of the elongated product in a manner independent of the rotational speed of the shaft 11-5 without having to change the rotational speed of the shaft 11-5 or the rotational speed of the driving device 11-4.
In the case of a bypass section 38 arranged in the machining line, the shaft 11-5 can likewise be driven by the drive 11-4, so that the second roller 11-2 is driven to an angular velocity which corresponds to the angular velocity of the shaft 11-5. The second roller 11-2 is mounted on the shaft in a rotationally fixed manner so that the elongated product can be driven by the driving means 11-4 through the shaft 11-5 and the second roller 11-2 as the elongated product moves.
Fig. 7 shows a further embodiment of the application, wherein the guide segments (32, 34, 36, 38) are arranged along the endless carrier (3-2), wherein each guide segment (32, 34, 36, 38) can be aligned with the processing line by a further movement of the carrier in the endless direction.
In particular, the embodiment shown in fig. 7 shows a chain-like endless carrier 3-2 embodied as a circulating conveyor, on which a plurality of cooling devices 3-2-1 and a bypass guide 3-8-1 are arranged. The number of the surrounding carriers is not limited, and six surrounding carriers 3-2 are shown in the embodiment shown in fig. 7, for example, and fewer or more than six surrounding carriers 3-2 may be provided. The foremost carrier 3-2 in the figure has a plurality of cooling devices 3-2-1 and a bypass guide 3-8-1. For clarity, some reference signs are not shown. In the embodiment shown, four cooling devices 3-2-1 and one bypass guide 3-8-1 are arranged on the first endless carrier 3-2, and more or fewer cooling devices 3-2-1 or bypass guides 3-8-1 can also be arranged on the endless carrier 3-2. In particular, more or less cooling devices 3-2-1, 3-2-2, 3-2-4, 3-2-5, 3-2-6 or bypass guides 3-8-1, 3-8-2, 3-8-3, 3-8-4, 3-8-5, 3-8-6 can be arranged on one of the surrounding carriers 3-2 than on the other carrier 3-2.
In the case of a further movement of the endless carrier 3-2, it is preferable if, in the case of a further movement of each endless carrier 3-2, a different cooling device 3-2-1 can be arranged in the processing line in order to arrange a further cooling section 32, 34, 36 or a bypass guide 3-8-1 in the processing line. In the embodiment shown, all the endless carriers 3-2 are handled substantially simultaneously when the cooling section is replaced, but in other embodiments only one endless carrier 3-2 may be moved further while the remaining endless carriers 3-2 remain in place.
In the embodiment shown, the cooling devices 3-2-1, 3-2-2, 3-2-3, 3-2-4, 3-2-5, 3-2-6 and the bypass guides 3-8-1, 3-8-2, 3-8-3, 3-8-4, 3-8-5, 3-8-6 are arranged on different surrounding carriers 3-2, but it is also possible to arrange several or all of the cooling devices 3-2-1, 3-2-2, 3-2-3, 3-2-4, 3-2-5, 3-2-6 and several or all of the bypass guides 3-8-1, 3-8-2, 3-8-3, 3-8-4, 3-8-5, 3-8-6 on one common surrounding carrier 3-2.
Reference numeral table
Unless the context indicates otherwise, like reference numerals in the drawings refer to like features or features that are substantially identical in function.
1-1 water tank
1-4-1 Cooling section
1-4-2 Cooling section
1-4-3 Cooling section
1-5 bypass section
1-3-1,1-3-2 cooling device
1-2-1..1-2-6 cooling device
3-3-1,3-3-2 cooling device
3-2-1..3-2-6 cooling device
3-8-1..3-8-6 bypass guide
3-1 rotor
3-2 surrounding type carrier
11. Feed side
13. Discharge side
32. Cooling section
34. Cooling section
36. Cooling section
38. Bypass section
40. Rotor shaft
60. Guiding device
62. Axis of shaft body
64. Bearing surface
66. Lateral guide
70 72 grooves
11-1 first roller
11-2 second roller
13-2-1..13-2-8 second roller
11-3 bearing
11-4 driving device
11-5 shaft body
12-1 shaft body
12-2 bearing
13-1 vector
13-3 horizontal direction
13-4 vertical direction
12. Rail track
14. A track.
Claims (7)
1. A device for cooling and/or guiding an elongated product,
the device comprises:
a plurality of guide sections (32, 34, 36, 38), at least one of which is designed as a bypass section (38) and at least one as a cooling section (32, 34, 36),
wherein the guide segments (32, 34, 36, 38) are jointly movable such that each of the guide segments (32, 34, 36, 38) can be optionally arranged in alignment with a processing line,
and wherein the guide segments (32, 34, 36, 38) are arranged on a rotor (3-1) rotatable at 360 ° about a rotor axis, and wherein each of the guide segments (32, 34, 36, 38) can be arranged optionally in alignment with the processing line by rotation of the rotor (3-1),
wherein the bypass section (38) is a bypass roller way.
2. A device for cooling and/or guiding an elongated product,
the device comprises:
a plurality of guide sections (32, 34, 36, 38), at least one of which is designed as a bypass section (38) and at least one as a cooling section (32, 34, 36),
wherein the guide segments (32, 34, 36, 38) are jointly movable such that each of the guide segments (32, 34, 36, 38) can be optionally arranged in alignment with a processing line,
and wherein the guide segments (32, 34, 36, 38) are arranged on a linearly vertically movable actuator, and wherein each of the guide segments (32, 34, 36, 38) can be arranged in selectable alignment with the processing line by vertical movement of the actuator.
3. A device for cooling and/or guiding an elongated product,
the device comprises:
a plurality of guide sections (32, 34, 36, 38), at least one of which is designed as a bypass section (38) and at least one as a cooling section (32, 34, 36),
wherein the guide segments (32, 34, 36, 38) are jointly movable such that each of the guide segments (32, 34, 36, 38) can be optionally arranged in alignment with a processing line,
and wherein the guide segments (32, 34, 36, 38) are arranged along a surrounding carrier (3-2), and wherein each of the guide segments (32, 34, 36, 38) can be arranged in alignment with the processing line by further movement of the carrier (3-2) in a surrounding direction.
4. A device according to claim 2 or 3, wherein the bypass section (38) is a bypass roller way.
5. A device according to any one of claims 1-3, wherein the bypass section (38) is constructed as an exposed guide, wherein the bypass section (38) is exposed on at least one side, thereby facilitating thermal cooling of the elongated product.
6. The device according to claim 5, wherein the bypass section (38) is exposed on the top side.
7. The device according to claim 5, wherein the bypass section (38) is exposed on the top side and laterally.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020205251.4 | 2020-04-24 | ||
| DE102020205251.4A DE102020205251B3 (en) | 2020-04-24 | 2020-04-24 | Device for cooling or guiding a long product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113546968A CN113546968A (en) | 2021-10-26 |
| CN113546968B true CN113546968B (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110441643.XA Active CN113546968B (en) | 2020-04-24 | 2021-04-23 | Device for cooling or guiding elongated products |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113546968B (en) |
| DE (1) | DE102020205251B3 (en) |
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| DE19960638A1 (en) | 1999-12-16 | 2001-06-28 | Sms Demag Ag | Water cooling section for wire |
| ITMI20110848A1 (en) | 2011-05-13 | 2012-11-14 | Danieli Off Mecc | APPARATUS FOR HEAT TREATMENT IN LINE OF METALLURGICAL SEMI-FINISHED PRODUCTS |
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| DE102017216986A1 (en) * | 2017-09-25 | 2019-03-28 | Thyssenkrupp Ag | Furnace roll, transport device hereby and method of operation thereof |
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| CN113546968A (en) | 2021-10-26 |
| DE102020205251B3 (en) | 2021-10-07 |
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