Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
  • B21B31/10—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by horizontally displacing, i.e. horizontal roll changing
  • B21B31/103—Manipulators or carriages therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/02—Rolling stand frames or housings; Roll mountings ; Roll chocks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/08—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts
  • B21B31/12—Interchanging rolls, roll mountings, or stand frames, e.g. using C-hooks; Replacing roll chocks on roll shafts by vertically displacing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
• • 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
  • B21B27/02—Shape or construction of rolls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/07—Adaptation of roll neck bearings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/07—Adaptation of roll neck bearings
  • B21B31/076—Cooling; Lubricating roller bearings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/07—Adaptation of roll neck bearings
  • B21B31/078—Sealing devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
  • B21B31/16—Adjusting or positioning rolls
  • B21B31/20—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis
  • B21B31/22—Adjusting or positioning rolls by moving rolls perpendicularly to roll axis mechanically, e.g. by thrust blocks, inserts for removal
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
  • B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
  • B21B1/18—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section in a continuous process
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
  • B21B17/08—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills
  • B21B17/10—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling with mandrel having one or more protrusions, i.e. only the mandrel plugs contact the rolled tube; Press-piercing mills in a continuous process
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
  • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
  • B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills

Definitions

• the present invention relates to a stand exchange carriage for simultaneously picking up and transporting several rolling stands of a rolling block for rolling metallic bars, wires or tubes.
• the rolls wear down, which is why they must be refurbished at regular intervals.
• the rolling stands with the rolls to be refurbished must be removed from the rolling ingot and transported to a stand workshop. After the rolls have been refurbished, the respective rolling stands must then be transported back from the stand workshop to the rolling ingot and reinstalled.
• stand-changing trolleys are commonly used.
• one made of CN 215 089 793 U The well-known stand-changing wagon is capable of accommodating several rolling stands simultaneously and transporting them safely between the rolling block and the stand workshop.
• a disadvantage of this stand-changing carriage is that it requires a complex stand-supporting mechanism for the rolling block, which must be designed to push the rolling stands onto the carriage and pull them from the carriage into the support. To make this possible, not only is a suitable movement mechanism required, but the design must also be such that the stand-changing carriage can move close enough to the support to allow the movement mechanism to maneuver the rolling stands between the support and the carriage.
• an object of the present invention is to provide a stand-changing trolley of the above-mentioned technical field which places lower demands on the stand support.
• an object of the invention is to provide a stand-changing trolley with which it is possible to move the rolling stands into the stand support particularly safely, and at the same time quickly and reliably.
• a stand exchange carriage for simultaneously picking up and transporting several rolling stands of a rolling ingot for rolling metallic bars, wires or tubes has several stand positions, with one of the rolling stands being individually pick-upable in each of the stand positions.
• the stand change carriage also has a lifting mechanism designed to raise and lower each of the rolling stands individually.
• the stand positions on the stand exchange wagon are designed to accommodate exactly one rolling mill stand each. Therefore, any number of rolling mill stands, up to the number of stand positions on the stand exchange wagon, can be selectively picked up and transported using the individual stand positions.
• the stand positions are arranged so that their arrangement corresponds to the arrangement of the stand positions, in particular the receiving modules of the stand receptacle.
• the stand change carriage can approach the receptacle laterally, relative to the rolling direction in which the rolling stands are arranged one behind the other in the receptacle, and pick up or drop off the rolling stands individually or simultaneously.
• Any suitable and designed mechanism can serve as the lifting mechanism for raising and lowering the rolling stands individually.
• Examples include hydraulic mechanisms, electrically driven mechanical mechanisms, or even manually operated cranks.
• the lifting mechanism allows the stand exchange carriage to raise the rolling stands independently of any movement mechanism of the stand support, then to move the stands into the support and lower them into place. Conversely, the lifting mechanism allows the stand exchange carriage to grasp the desired stands, lift them in the support, and transport them directly, while stands not being transported remain in the support.
• the lifting mechanism makes it possible, on the one hand, to selectively choose and lift rolling stands for transport. On the other hand, the lifting mechanism places very low demands on the stand support.
• the scaffold exchange trolley has multiple wheels to transport the rolling mill stands along rails or a trackless surface. Multiple wheels enable stable yet flexible transport and can be designed to be suitable for both rails and trackless surfaces. This allows for adaptation to varying conditions at the scaffold pick-up point and the scaffold workshop. Alternatively, the scaffold exchange trolley can also be transported differently, for example, by tracked vehicles.
• the wheels are positioned outside the area containing the scaffolding positions, so that all scaffolding positions are located within the area defined by the wheels. This ensures that the heavy rolling stands are also positioned between the wheels, so that the center of gravity of the loaded scaffolding trolley lies securely between the wheels, allowing the trolley to transport, pick up, and set down the rolling stands stably and safely.
• the wheels can also be positioned within the area containing the scaffolding positions, meaning that scaffolding positions can also be located outside the area defined by the wheels.
• the lifting mechanism advantageously incorporates a spindle mechanism for raising and lowering the rolling stands.
• a spindle mechanism is a particularly preferred lifting mechanism because it can exert large forces very precisely over a long distance. This allows the rolling stands to be raised and lowered safely and with high accuracy.
• hydraulic mechanisms or hand cranks can also be used.
• the lifting mechanism includes lifting pins for gripping the rolling stands, with two lifting pins arranged at each stand position.
• the lifting pins are designed to grip the rolling stands by engaging corresponding openings in the stands.
• other devices such as a fork or clamp, can be used to grip and lift the rolling stands.
• the lifting pins are an effective way to grip and raise or lower the rolling stands. This results in a secure, simple, and therefore low-maintenance and cost-effective connection between the lifting mechanism and the rolling stands.
• the scaffold trolley has a power source to supply energy to the lifting mechanism.
• the scaffold trolley can also be equipped with an external power supply, for example by a power cable or an induction field at the locations where the lifting mechanism is to be operated.
• the scaffold trolley Having its own power source makes the scaffold trolley particularly advantageous because it can operate autonomously and has a greater range of motion, unconstrained by cables or similar devices.
• the trolley's own power source also allows it to move the trolley itself, not just to operate the lifting mechanism independently.
• the stand change carriage has at least four stand positions and the lifting mechanism is designed to raise and lower the at least four rolling stands individually.
• the lifting mechanism may be designed to raise and lower several rolling stands together.
• rolling mill stands are designed to have four stands arranged in a row along the rolling direction. Therefore, it is particularly advantageous to also provide four stands for the stand changer carriage, so that all rolling stands can be replaced simultaneously at such stands.
• a protective barrier is arranged in pairs between the scaffold positions to cover the gap between them.
• the protective barrier can be omitted, particularly if the scaffold support already incorporates a protective device for the gap between adjacent rolling stands.
• the protective barrier enables the stand changer carriage to make an additional contribution to machine safety and thus particularly well support the operation of the rolling mill when the carriage remains in the stand support during operation. This is optional.
• the protective barrier prevents rolled material from escaping from the gap between adjacent rolling stands in the event of a malfunction. It also reliably prevents a person from reaching into this gap. Consequently, the stand support does not require this type of protection.
• the protective barrier is equipped with an inflatable sealing lip on both sides facing the scaffold platforms.
• a sealing lip can be omitted or designed differently, in particular purely elastically without being inflatable.
• a sealing lip ensures that the protective barrier reliably prevents the escape of splash water, which is generated in large quantities in the space between adjacent rolling stands during the operation of the rolling block. This water is used for cooling.
• the stand changer carriage If a protective barrier exists between adjacent stand positions, this barrier can be further improved by a sealing lip. If the sealing lip is inflatable and not merely elastically deformable, it can cover a particularly large gap between the protective barrier and the rolling stand, a receiving module, or a stand position within the stand assembly, creating a particularly tight seal.
• the stand positions are designed to accommodate a rolling stand with a hexagonal outer shape, viewed along one of the rolling directions of the rolling stand.
• the stand positions can also be designed to accommodate a differently shaped rolling stand, for example, a conventional rolling stand with a rectangular outer shape.
• Rolling stands with a hexagonal outer shape are particularly suitable for handling by the stand change carriage described above, because there is a lateral projection, provided the rolling stands are standing on a side surface, which can be easily gripped by the lifting mechanism, especially the lifting pins.
• the stand change carriage described above can make an additional contribution to machine safety, as it conceals these couplings during operation of the rolling block when it remains in the stand holder.
• Fig. 1 Figure 10 shows a preferred stand exchange carriage 10 for accommodating four rolling stands 12.
• the stand exchange carriage is equipped with four stand positions 16, each designed to individually accommodate a rolling stand 12.
• a rolling mill stand 12 is mounted in one of the stand positions 16, while the three other stand positions 16 are empty.
• the second stand position 16 of the stand exchange carriage 10 is occupied by a rolling mill stand 12, and the first, third, and fourth stand positions 16 are empty.
• Fig. 1 Figure 14 further shows a rolling block 14 with four stand mounting positions 34 arranged one behind the other along the rolling direction W of a stand mounting 32.
• Three rolling stands 12 are mounted in the stand mounting positions 34, namely, viewed from the left, in the first, third, and fourth of the stand mounting positions 34.
• the stand change carriage 10 in Fig. 1 is positioned so that it can drive laterally into the stand receptacle 32 in order to move the rolling stand 12 into the second stand receptacle 16.
• the roll block 14 is accessible from the right side as seen in the rolling direction W by the stand exchange carriage 10 or by a worker in order to exchange rolling stands 12 or to make adjustments to the rolling stands 12 or other parts of the roll block 14.
• the rolling stands number 12 in the Fig. 1
• a hexagonal outer shape is provided, wherein they stand on a side surface of the hexagon formed by the outer shape, so that one corner of the hexagon is reachable at half the height of the rolling stand 12 on the accessible side.
• the scaffolding trolley 10 has a base frame 36 which is mounted on wheels 20 via a Fig. 1
• the indicated rail system is movable.
• the base frame 36 has a beam 38 and two legs 40 extending laterally from its two ends, with the wheels 20 arranged at the two ends of the two legs 40.
• the base frame 36 thus spans a rectangular area, which it surrounds in a C-shape on three sides, with one of the wheels 20 arranged at each corner. This allows large loads to be accommodated within the area enclosed by the base frame 36 and transported safely on the wheels 20.
• the stand change carriage 10 has a four-part lifting mechanism 18. Each part of the lifting mechanism 18 belongs to one of the stand positions 16 and is designed to individually raise and lower a rolling stand 12.
• the lifting mechanism 18 comprises two lifting pins 24 at each of the stand positions to interact with corresponding openings in the rolling stands 12. Openings are provided in the aforementioned corner of the hexagon at half the height of the rolling stand 12 on the accessible side, but other arrangements of the openings and other means of interaction between the lifting mechanism 18 and the rolling stands 12 are also possible.
• the lifting pins 24 are mounted on a vertically movable carriage 42, which is guided over a vertical rail 44. Thus, each rolling stand 12 can be gripped by the lifting pins 24 and individually raised and lowered by vertically moving the corresponding carriage 42 along the vertical rails 44.
• a spindle mechanism 22 is provided to operate the lifting mechanism 18.
• Each part of the lifting mechanism 18, i.e., the carriage 42 of each of the scaffold positions 16, is equipped with its own driven spindle 46, which extends from the stile 38 to the carriage 42 and interacts there with a thread.
• a protective barrier 26 is arranged between each pair of adjacent roll stands 16 to cover a gap 28 between the roll stands 16.
• the protective barrier 26 extends essentially vertically and is shaped and dimensioned to run parallel to the outer shape of the roll stands 12. Furthermore, each of the protective barriers 26 has two sealing lips 30 that extend along the outer shape of the roll stand 12 located on that side next to the protective barrier 26.
• the sealing lips 30 are inflatable and can thus establish a tight contact between the protective barrier 26 and the rolling stand 12. If the stand change carriage 10 remains in the stand receptacle 32 during operation of the rolling block 14, the protective barrier 26 ensures that no metal or splash water escapes from the area between adjacent rolling stands 12 and that no one reaches into this area.
• Fig. 2 shows scaffolding change trolley 10 from Fig. 1 in a position retracted into the scaffold receptacle 32.
• the part of the lifting mechanism 18 belonging to the second scaffold position 16 (viewed from the left) is not fully raised, while the other three parts of the lifting mechanism are fully raised.
• FIG. 3 Figure 1 shows a cross-sectional view along the rolling direction W of the stand change carriage 10 in the rolling block 14.
• the stand change carriage 10 can enter the rolling block 14 as shown here and remain there, while the rolling stand 12 transported by the stand change carriage 10 is received in the stand receiving position 34 of the stand receiving 32.
• the protective barrier 26 can serve to protect the gap 28 between adjacent rolling stands 12 during operation.
• the protective barrier 26 can prevent rolled material from escaping the gap 28 or a person from reaching into the gap 28.
• the sealing lips 30 on the protective barrier 26 can be inflated in the retracted configuration of the stand change carriage 10, thus sealing the gap 28 in a splash-proof manner. This allows cooling water, which is released in large quantities between the rolling stands 12 during operation, to be contained within the gap 28 and discharged in a controlled manner.
• FIG. 4 Figure 1 shows an enlarged section of the scaffolding trolley 10 to illustrate the sealing lips 30 more closely.
• the sealing lips 30 are located on both sides of the protective barrier 26 to seal against the surfaces on these two side rolling stands 12, which are in Fig. 4 not shown, to create a splash-proof connection and to keep the cooling water released in the space 28 between adjacent rolling stands 12 inside the rolling block 14 and to protect the area in front of the rolling block 14 from it.
• Fig. 4 are also those in the Fig. 1 and 2
• the depicted lifting pins 24 are shown without engaging with a rolling stand 12 to raise or lower it.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Geometry (AREA)
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ID=91129792

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Citations (4)

Family Cites Families (5)

• 2024
  • 2024-05-16 EP EP24176222.8A patent/EP4650072A1/fr active Pending
  • 2024-06-28 CN CN202421509579.XU patent/CN223128915U/zh active Active
  • 2024-06-28 CN CN202410856992.1A patent/CN120961617A/zh active Pending
  • 2024-07-29 US US18/786,867 patent/US20250353060A1/en active Pending
  • 2024-07-29 KR KR1020240100328A patent/KR20250164605A/ko active Pending
  • 2024-07-29 JP JP2024122293A patent/JP2025174790A/ja active Pending

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