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

Definitions

• the invention relates to a rolling mill with support plates or platforms provided on the operating side of the stands and displaceable transversely to the roll axes.
• These support plates are equipped with pairs of rails to change the work roll sets by moving them sideways and thus to take up work roll sets from the roll stands, and they adjoin the hut floor so that the work rolls can be transported in and out.
• the stands are also preceded by pits, the base of which is equipped for extending roller sets, in particular with extending rails.
• Such a rolling mill with transversely displaceable, i.e. Support plates which can be displaced in the rolling direction or counter to the rolling direction are known from DE 43 21 663 A1.
• the pits, which are arranged between the rolling stands and the cross-movable support plate line, are overlapped with swiveling flaps. These flaps are in a horizontal position for the work roll change, while they release the pit for retracting the support roll sets by a folding movement when changing the support roll.
• the work rolls are towed by tractors from the scaffold over the flaps to the support plates, whereby both the flaps and the support plates are equipped with corresponding pairs of rails.
• the object of the invention is to create a rolling mill in which the work roll change can be achieved within a shorter time sequence.
• the support plates which can be moved laterally, are transported by means of a conveying device from a position for changing the work roll by lowering transversely to the rolling direction in the direction of the control platform through the pits into an adjacent area below the hut floor in a position for changing the support roll and back.
• the support plates In the work roll position, the support plates are located directly on the roll stands and form the top of the pits themselves.
• the transverse displacement is arranged directly in front of the rolling mill. Therefore, the travel of the work rolls can be minimized and the time required to change the work rolls can be reduced to a minimum.
• the support plates are slanted downwards through the pit area between a first position, in which they are arranged directly next to the rolling stands above the pits, and a second position, in which they are arranged in front of the pit (seen from the control platform) below the hut floor sunk through, maintaining their orientation during the transport movement.
• the conveying device for the support plates can, for example, be an extendable lifting platform, which accomplish the lowering movement of the plates below the hut floor and the movement movement out of the pit area necessary for the support roller sets.
• the transport device comprises an undercarriage with rollers.
• the support plate itself is slidably arranged to a table of the undercarriage in order to allow the transverse displacement along the line of support plates.
• Ramps are arranged at the bottom of the respective pit and rise in the direction of the roll stand.
• the piston or a traverse extending the piston is rotatably connected to a support rod, the other end of which is rotatably mounted on the underside of the undercarriage table.
• Figure 1 is a side view of a rolling mill with rolling stands and a directly arranged support plate line with individually retractable and movable support plates.
• Fig. 2 is a top view of the rolling mill of Fig. 1; 3 shows the sectional view BB of FIG. 1 with a support plate in the position for changing the work roll; Fig. 4 shows the sectional view AA of FIG. 1 with a support plate in the position for changing the support roller.
• FIG. 1 and 2 show a rolling mill with - here - seven finishing stands F1-F7.
• BS the opposite drive side is identified by AS
• AS the opposite drive side
• Each support plate 2 is equipped with pairs of rails 3 provided along the roller axes.
• a used work roll set 4 ' has been pulled out onto a support plate 2a, while new work roll sets 5 are already waiting for their use directly on the adjacent support plate 2b and are brought into line with the corresponding roll stand by transverse displacement.
• the transport by means of the tractors 8 can take place, for example, according to the method known from DE 43 21 663 A1, according to which gear wheels of the tractor engage in racks along the rails.
• the function of the tractor can alternatively be realized by a hydraulic cylinder.
• Back-up roller set 9 is arranged on the operating side BS or in the direction of the control platform in each case a pit 10, the base 11 of which is equipped with extension rails (not shown) for the back-up roller sets 9.
• this pit 10 is covered by a support plate 2.
• the support plate 2 covers the pit 10 flush between the roll stand Fi and the adjacent hut floor 7.
• the traction machines 8 which move the work roll sets 4 in and out can move directly up to the support plates 2 via this hut floor 7. Used roller sets 4 ′′ can be pulled directly into the roller workshop WW or moved back from there via corresponding rail tracks.
• the support plates 2 themselves are transported and held in the horizontal position shown in FIG. 3 with the aid of a conveyor device 12.
• This conveyor device 12 here in the form of an undercarriage 13 essentially consists of a table 14 and two pairs of rollers 15a, b arranged thereon.
• the table 14 itself has 16 rails 17 on its upper side (cf. FIG. 2) which extend transversely to the
• the support plates 2 have corresponding rollers 18 which can be moved along these rail tracks for transverse displacement.
• FIG. 4 The position of the support plates 2 for changing the support roller is illustrated in FIG. 4. Since the pit is completely filled by the lower part of the support roller set 9, the support plate 2 has been lowered obliquely downward into an area 21 adjacent to the pit area 10. For this purpose, the undercarriage 13 is moved along the pairs of ramps 20a, b away from the roll stand Fi under the hut floor 7, with corresponding guide cams 22 supporting the movement. These guide cams 22 prevent the tables 14 from moving laterally during the lowering movement and in the lowered position. The movement of the carriage 13 and thus of the support plates 2 is carried out by means of the piston-cylinder unit 23, which also causes the movement of the support roller set 9.
• a traverse extending the piston or an adapter 24 is connected to the support roller set 9 and moves it by horizontal movement along extension rails into the pit 10 and after changing the support rollers. Simultaneously with the extension of the support roller set 9, the undercarriage 13 is moved from the raised position into the lowered position below the hut floor 7.
• a push rod 25, which is rotatably arranged in the center on the underside of the table 14, engages the undercarriage and pulls it from the ramps into the countersunk support plates.
• the end of the hut floor immediately adjacent to the pit 10 is provided with a flap 31.
• the front pair of ramps 20a is offset from the rear pair of ramps 20b.
• the exit lines along wedge rails 30 can be seen in particular in the top view of FIG. 2.
• the support plate 2c which is assigned to the second finishing stand F2 is retracted to the side, i.e. transverse to the rolling direction, while all other support plates 2 are shown in the work roll change position.
• the driven-out work roll set 4 with the new work roll set 5 arranged next to it is shown on the support plate 2c of the first stand F1.
• the support plates are preferably not connected to one another, but are arranged side by side side by side. They are moved back and forth by means of two printing units 26a, b, which each attack from one end of the support plate line 1.
• the plates 2 roll along the pairs of rails 17 introduced into the table 14 of the undercarriage 13.
• Side guide rollers 27 which roll along the guide unit 19 arranged on the table 14 prevent tilting.
• Each support plate 2 is assigned an adjustment unit 28, the position of which is variably adjustable, by means of which the respective support plate 2 in the position for changing the work roll corresponds to a ready Fi can be adjusted.
• the pressure cylinder-piston units 26a, b are covered with cover plates 29 in the embodiment shown (cf. FIG. 1).
• the proposed solution ensures that the support plate line is located directly next to the finishing stands and the transport routes for the work rolls are short.
• the support plates are moved by means of a transport device by means of a lowering and moving movement.
• the work roll change is carried out by a transverse shift of the support plates.
• the support plates are lowered and moved in the direction of the control platform.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Metal Rolling (AREA)
• Rollers For Roller Conveyors For Transfer (AREA)
• Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
• Intermediate Stations On Conveyors (AREA)
• Handcart (AREA)
• Machine Tool Units (AREA)
• Straightening Metal Sheet-Like Bodies (AREA)
• Vibration Prevention Devices (AREA)
• Buildings Adapted To Withstand Abnormal External Influences (AREA)
• Rolling Contact Bearings (AREA)
• Rolls And Other Rotary Bodies (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=32103163

Family Applications (1)

Country Status (10)

Cited By (1)

Families Citing this family (3)

Citations (5)

Family Cites Families (9)

• 2002
  • 2002-10-30 DE DE10250431A patent/DE10250431A1/de not_active Withdrawn
• 2003
  • 2003-09-23 AT AT03748074T patent/ATE327056T1/de not_active IP Right Cessation
  • 2003-09-23 AU AU2003267397A patent/AU2003267397A1/en not_active Abandoned
  • 2003-09-23 JP JP2004547495A patent/JP4403077B2/ja not_active Expired - Fee Related
  • 2003-09-23 CN CNB038248484A patent/CN1304130C/zh not_active Expired - Fee Related
  • 2003-09-23 RU RU2005102112/02A patent/RU2319563C2/ru not_active IP Right Cessation
  • 2003-09-23 DE DE50303508T patent/DE50303508D1/de not_active Expired - Lifetime
  • 2003-09-23 US US10/530,385 patent/US20060150702A1/en not_active Abandoned
  • 2003-09-23 EP EP03748074A patent/EP1558409B1/de not_active Expired - Lifetime
  • 2003-09-23 UA UAA200501035A patent/UA80980C2/uk unknown
  • 2003-09-23 WO PCT/EP2003/010549 patent/WO2004039512A1/de active IP Right Grant

Patent Citations (5)

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