Classifications

• • 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
  • B21B23/00—Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes planetary tube rolling, auxiliary arrangements, e.g. lubricating, special tube blanks, continuous casting combined with tube rolling
• • 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
  • B21B1/20—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 non-continuous process,(e.g. skew rolling, i.e. planetary cross rolling)
• • 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
  • B21B17/02—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, i.e. the mandrel rod contacts the rolled tube over the rod length
  • B21B17/04—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, i.e. the mandrel rod contacts the rolled tube over the rod length 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
  • B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
  • B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
  • B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21B—ROLLING OF METAL
  • B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
  • B21B25/06—Interchanging mandrels, fixing plugs on mandrel rods or cooling during interchanging mandrels
• • 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
  • B21B37/48—Tension control; Compression control
  • B21B37/52—Tension control; Compression control by drive motor control
• • 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
  • B21B37/78—Control of tube rolling

Definitions

• the invention relates to a method and a rolling plant for producing wire, rods or seamless tubes on a rolling plant for rolling heated metallic material, comprising optionally a perforated rolling mill, a multi-stand stretching rolling mill as the main drawing stage, a pull-out rolling mill, a finishing mill, viewed in the rolling direction and a wire rolling block as well as upstream, intermediate or downstream equipment such as a preheating and post-heating furnace, roller tables, separating devices and a cooling bed.
• BESTATIGUNGSKOPIE The invention is therefore based on the object of providing a rolling method and a rolling installation of the type mentioned at the outset, which permit optimized operation with a further reduced outlay on equipment.
• a 3-roll continuous rolling mill is used in the main stretching stage and is used both for tube rolling and for solid rolling in the production of bars, wire or the like, for which purpose a mandrel bar used for tube rolling in an out-of-operation position is brought and provided steel bar rolls with rolls calibrated for a large diameter reduction are exchanged for the rolls with their rolls calibrated for pipe rolling.
• continuous rolling mill sometimes also called “continuous tube rolling mill” the person skilled in the art understands a rolling mill consisting of several consecutive rolling stands with an internal mandrel bar, as has become known, for example, from DE-Z "Berg- und Wegtenmännchen Monthly Bulletin 130 (1985) No. 7, pages 205 to 211. "
• An advantageous embodiment of the method according to the invention provides that a 3-roll cross-rolling mill is also used for the perforating mill upstream of the main stretching stage, the perforated rollers for solid rolling with removed piercing mandrel bar being exchanged for provided steel bar rollers with rollers calibrated for diameter reduction.
• the 3-roll cross-rolling mill according to the invention in a perforated rolling mill then enables the production of different bar steel diameters in the sense of a pre-reduction, i.e. with a piercing rod moved away for solid rolling. a proportional reduction in cross-section based on the total reduction of all operated rolling mills.
• the piercing mill also fulfills a universal function.
• a rolling mill for carrying out the method has a multi-stand 3-roll continuous rolling mill designed to hold steel bar rolls or tube rolls and a device for removing the mandrel bar.
• the continuous rolling mill or the main stretching stage takes on either the one or the other stands or sets of rolls, each consisting of three rolls, on a frame.
• Corresponding stands can be provided in addition to the continuous rolling mill, which can then be brought into the operating position after the previous stands have been pulled out of the frame.
• a cassette construction or the exchange of only the rollers with the scaffold housings remaining in the frame is possible.
• the mandrel bar can be moved to a non-operating position with the aid of the dome bar holding device when converting the 3-roll continuous rolling mill to solid rolling.
• This also applies to the perforated dome rod of the cross-rolling mill optionally upstream of the main stretching stage, which according to one embodiment of the invention is also designed as a universally usable 3-roll cross-rolling mill.
• a preferred embodiment of the invention provides that a speed control is assigned to the 3 ⁇ / valve continuous rolling mill of the main stretching stage. This advantageously enables the different rolling speeds to be achieved in tube and bar rolling.
• the pull-out rolling mill arranged behind the main stretcher advantageously has two stand units which are arranged at a distance from one another and have end shears which can be inserted between them, bad ends can be easily cut off before further rolling in solid rolling. On the other hand, the use of scissors is not necessary for tube rolling.
• the pull-out rolling mill is advantageously followed by a reheating furnace. From there, the heat-treated steel bars or, for example, alloyed or unalloyed steel pipes reach the finishing mill. This can include a sizing mill, a reducing mill or a stretch-reducing mill or a combination of these units. If a steel bar is to be rolled into wire, a roller table leading to the wire block is arranged behind the cooling bed.
• the universal rolling mill shown in the system diagram processes in one line, i.e. deviating from the drawing, the plant part shown in the lower half of the figure linearly joins the plant parts of the upper half of the drawing, which is indicated by the meandering line, an input material (insert block) either to seamless tubes or to bars, wire or similar solid rolled material.
• a heated insert block is fed from there to a perforated cross-rolling mill designed as a 3-roll cross-rolling mill 3, where the block is guided in an inlet channel and rolled onto a mandrel bar provided with a piercing mandrel to form a hollow block in preparation for the subsequent rolling out to a seamless one Tube is deformed.
• a cross roll mill 3 in three-roll construction is known in the manufacture of pipes. If it is not pipes but rods or wire that are to be rolled, the 3-roll cross-rolling mill 3 is used with the mandrel rod held back or removed from the rolling line. massively reducing the block and compacting the structure instead.
• the hollow blocks or the solid blocks are loaded into the downstream rolling devices.
• These include a main drafting stage 4, which here as a 6-stand 3-roll Continuous rolling mill 5 is formed.
• a pull-out rolling mill 6 which here has two stand units 6a, 6b arranged at a distance from one another. Insertable end shears 8, 9 are provided both between the multi-stand 3-roll continuous rolling mill 5 and the pull-out rolling mill 6 and between the two stand units 6a, 6b of the pull-out rolling mill 6.
• a hollow block is stretched in the 6-stand 3-roll continuous rolling mill 5 and, after pulling out the mandrel bar, which is carried out by a back and forth mandrel bar holding device, reduced as a slug in the two stand units 6a, 6b of the pull-out rolling mill 6, while at Solid rolling, even the 6-stand 3-roll continuous rolling mill 5, like the pull-out rolling mill 6, reduces the bar steel by reducing the diameter.
• the rolling stock is brought to the required temperature in a reheating furnace 11.
• a cropping saw 12 arranged on the outlet side of the sizing or stretching reduction mill 10 divides the finished tube or the finished rolled steel bar into the desired lengths. The finished lengths are then transferred to a cooling bed 13. If, on the other hand, the bar steel is to be rolled into wire, the bar steel is fed to a wire block 15 via an extension of the cooling bed roller table 14.
• the universal rolling mill described thus allows seamless pipes as well as bars or wire to be rolled in one line.
• the rolls which have been calibrated for the pipe rolling are previously exchanged for rolls calibrated for a solid rolling and the mandrel rod is brought drive position, for example by moving the mandrel rod holding device into its retracted starting position.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Metal Extraction Processes (AREA)
• Heat Treatment Of Steel (AREA)

Applications Claiming Priority (5)

Publications (2)

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Family Applications (1)

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Cited By (1)

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• 2003
  • 2003-01-08 WO PCT/EP2003/000090 patent/WO2003057383A1/fr active IP Right Grant
  • 2003-01-08 RU RU2004124048/02A patent/RU2274503C2/ru active
  • 2003-01-08 EP EP03729229A patent/EP1463591B1/fr not_active Expired - Lifetime
  • 2003-01-08 BR BRPI0306683-5A patent/BR0306683B1/pt active IP Right Grant
  • 2003-01-08 ES ES03729229T patent/ES2243904T3/es not_active Expired - Lifetime
  • 2003-01-08 AT AT03729229T patent/ATE296689T1/de active
  • 2003-01-08 AU AU2003235800A patent/AU2003235800B2/en not_active Expired
  • 2003-01-08 PL PL369431A patent/PL203879B1/pl unknown

Non-Patent Citations (1)

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