Classifications

• • 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
  • B21B39/20—Revolving, turning-over, or like manipulation of work, e.g. revolving in trio stands
  • B21B39/30—Revolving, turning-over, or like manipulation of work, e.g. revolving in trio stands by lodging it in a rotating ring manipulator or ring segment manipulator

Definitions

• the invention relates to the edge rolls of a roller plier canter for manipulating blocks or rolling stock, preferably on the roughing stand of a rolling mill, the radial caliber turning on the roll casing of such edge rolls in the contact areas being precisely adapted to the different block cross sections of a spike edge / square calibration.
• the block is gripped before or after the respective roll pass, raised and brought into position and pierced from one roll caliber of the block roll to the next, FIG. 3.
• edge rolls with radial caliber turning have been used to manipulate the blocks or the rolling stock, which have either been adapted only to a block cross-section of a rolling pass or approximately the entire sequence of passes of a rolling stand.
• the different cross-sectional reductions of a sequence for example that of a spike edge / square calibration, must be manipulated.
• the strong hydraulic contact pressure per edge roller for gripping the block and the mismatched cross-sectional shapes of the block for the roller shutter they are parallel or oblique to the longitudinal axis of the Block caused strong pressure marks on the block surface.
• Block on its surface produce impressions of the same strength, which lead to the arched overlap errors occurring at certain intervals on the finished profile. This is illustrated by the outer radius I of the lower edge roller of FIGS. 4, 5 and 7.
• the feed of the block in its longitudinal axis to the roll stand due to the roller rollers can be very unfavorable.
• the block When piercing into the rolling caliber, the block is often not immediately packed and an attempt is then made to push the block into the rolling caliber with momentum by quickly turning the roller table rollers. This process has to be repeated in part and the strong rubbing of the roller table rollers creates material overlaps at the block edges.
• Profiled gripping rollers for edging block cross-sections are known from DT-AS 1 243 622 and DT-AS 1 284 923. As a result of the non-parallel and partly angular caliber formation of the gripping rollers, crushing on the surface of the block or rolled product is inevitable. With the DT-OS 2533 287 an edging device for
• the invention is based on the object of designing the roll casing of the edge rolls and of setting them up so that they can be controlled in such a way that when gripping and holding the different block and rolled material cross sections of a sequence on the surface, coarse bruises or thrusts which occur as surface defects on the finished rolled profile be avoided.
• the object is achieved in that the radial opening of the roll jacket on the various opening angles of the contact surfaces in parallel with each roll pass with the different block or roll cross sections, for example a spike edge / square calibration per sequence in a block or caliber roll is adapted, such as shown in FIG 12 and 13 to 16.
• the two edge rolls must be able to be moved together as closely as possible. So that the smaller radii of the block edges cannot run against the roll jacket and this causes crushing on the edges, the inner radius I of the roll jacket caliber must be enlarged and interpreted somewhat so that the block edge is either free or without contact pressure in radius I can run.
• the two outer radii on the roll casing must be designed as large as possible.
• a temperable and heat-resistant steel with high wear resistance is required for the high loads on the roll casing due to the rolling operation.
• a holding construction should be used to fasten the canter rollers in the canter's swivel arm, which enables quick release and easy changing of the rollers.
• an independent drive of the edge rollers is necessary.
• An additional requirement is a synchronous switching of the own drive of the edge rollers with the drive of the roller table rollers.
• 1 shows the schematic representation of the operating systems of a multi-stand profile mill from the pusher furnace to the duo roughing stand and the two roller tongs on the roughing stand; 2 shows a section of the area of the block frame with the two block rollers and the pairs of edge rollers on each side of the block roller; 3 shows the working positions of the two edge rollers when gripping / picking up and tapping the block into the rolling caliber;
• FIG. 1 shows a schematic representation of the operating systems of a multi-stand profile mill, the roller tongs on both sides of the roughing stand.
• the pusher furnace 1 blocks up to 1.5 tons in weight are heated to over 1,200 ° C.
• the block 2 is pulled with an underfloor chain hoist over the transverse transport 4 and then runs over driven roller table rollers 5 to remove the scale by means of a spraying system 6.
• the block 2 is manipulated with reversing driven block rollers 8 during the rolling process, each with a pair of edge rollers 9 on each side of the block stand 7.
• FIG. 2 illustrates the manipulation and the mode of operation of the roller pincer 9.
• the block 2 is held in a vertical position with about two tons of hydraulic contact pressure per edge roller 9 and moved in front of the roll caliber 10. Since the edge roller 9 has no self-propulsion, the block is driven by the roller table rollers 5 in its longitudinal axis to the block roller 8 and pushed into the roller caliber 10. After the two block rollers 8 have packed the block 2 and this runs through the rolling caliber 10, the two edge rollers 9 are opened, moved apart and moved down, turned back 90 ° into the horizontal gripping position and moved in front of the next rolling caliber 11 to receive the next rolling pass .
• the end of the block 2 is gripped with the second horizontally positioned pair of edge rollers 9 before it exits the roll caliber 10, raised vertically by 90 ° and brought to the next roll caliber 11 for tapping.
• the block 2 is driven back in the opposite direction to the roller 8 by the roller table rollers 5 and pierced into the roller caliber 11. After the entire pass sequence in the stand 7 has been passed, the block 2 runs after the last pass through the roller table 5 to the next stand for further pass acceptance.
• the edge rollers 9 are in the two working positions when gripping / picking up the block 2 with the two roller jacket calibers 12, as well as after one
• the edge of the edge and the axis of the spike edge 2 are parallel after the 3rd stitch.
• the radius III of the lower roll casing caliber 12 With the radius III of the lower roll casing caliber 12, the bottom of the block is approached when gripping the spike edge 2.
• radius III moves towards the center of the block and creates groove-like pressure marks on the surface of the block, diagonally to the longitudinal axis.
• thrusts on the lower edge of the block are also caused.
• the central axis of both roller shells 12 is rotated downward by approximately 10 ° to the diagonal block axis when picking up the skewer edge 2 after the third stitch.
• the radius I of the upper roll casing caliber 12 presses in the direction of the block edge.
• the block surface is approached with the radius III of the lower caliber 12 and pressure tracks which are inclined to the axis of the spike edge are generated in the process.
• FIG. 8 shows the contact areas 14 of the upper roll casing caliber 12 lying flat on the surface of the spike edge 2 after the 1st stitch. It can be seen that no bruises can occur on the block surface or groove-like pressure marks, while the unfavorable caliber shapes become clear for comparison on the lower caliber 12.
• FIG. 9 shows the parallel areas 15 of the newly developed shape to the square block 2 after the second stitch in the roll jacket caliber 12. The previous shape of the lower caliber 12 has a clear angular difference of around 12 °.
• FIG. 12 shows the calibration of the roll cover 12 with the three parallel contact areas 14, 15 and 16 in accordance with the cross-sectional and caliber shapes of block 2 of a spike edge / square calibration from the block or 1st to 4th (5th) stitch shown.
• the parallel areas 14 after the first roll pass with an opening angle of approximately 113 ° are located on the outside of the caliber of the roll shell.
• the parallel surface area 15 lies around 92 ° on the inside.
• the parallel region 16 after the third stitch with approximately 107 ° is located in the middle of the roll casing caliber 12.
• the inner radius 17 is formed in connection with the inner contact surface 15 so that the block edge runs freely and not on the enlarged radius 17 of the roll casing caliber 12 or the inner radius 17 on the radius of the block edge and the contact pressure of the edge rolls so it is agreed that crushing cannot occur at the block edges.
• FIG. 13 shows a section of the two roller coats 12 in the vertical piercing position when holding and guiding the block 2 with a spike-edged block cross section.
• the square 2 is held between the two guide surfaces 15 after the second stitch and before the piercing to the third stitch, the parallel regions being inside the caliber of the roll jacket 12.
• the skewed edge 2 is guided after the 3rd stitch and before the 4th stitch in the parallel areas 16 in the middle of the roll jacket caliber 12.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6228032

Family Applications (1)

Country Status (5)

Citations (3)

Family Cites Families (10)

• 1984
  • 1984-02-17 DE DE19843405742 patent/DE3405742A1/de active Granted
  • 1984-07-09 AT AT221584A patent/AT384964B/de not_active IP Right Cessation
• 1985
  • 1985-02-18 EP EP19850900979 patent/EP0172856A1/de not_active Withdrawn
  • 1985-02-18 EP EP85101714A patent/EP0155510A1/de not_active Withdrawn
  • 1985-02-18 AU AU40641/85A patent/AU4064185A/en not_active Abandoned
  • 1985-02-18 WO PCT/DE1985/000044 patent/WO1985003654A1/de unknown

Patent Citations (3)

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