EP2881187B1 - Roller levelling machine and method for inspecting, servicing and maintaining a roller levelling machine - Google Patents

Description

The present invention relates to a roller leveler according to the preamble of claim 1, for straightening straightening material, in particular straps and metal parts, which can be inspected, maintained and maintained in a simple and fast manner, including cleaning. Furthermore, the present invention relates to a method for inspecting, servicing and maintaining a roller leveler including cleaning work.

Rolled materials, such as strip steel or even rolled, in particular hot rolled sheets, have on its surface after the manufacturing process impurities such as scaling, which are replaced when straightening means Walzenrichtmaschinen by the bends of the material, after which they fall by gravity or at the top Stick to elements of the roller leveler.

Roll leveling machines conventionally have an upper and a lower roll mill, with an upper or lower leveling unit, wherein the upper leveling unit with respect to the lower leveling units by means of a plurality of drives moves up and down and, for example, to set the bite gap, can be inclined. The upper leveler conventionally comprises a plurality of upper straightening rollers and the lower straightening unit comprises a plurality of lower straightening rollers. The upper straightening rollers are mounted in upper bearing strips, and the lower straightening rollers are mounted in lower bearing strips.

A plurality of upper support rollers of the upper leveler and lower support rollers of the lower leveler serves to support the upper and lower straightening rollers, wherein the upper and lower support rollers are in turn mounted in a plurality of Stützrollenböcken.

The falling by gravity impurities hit the lower support rollers and contaminate them. This leads on the one hand to higher wear, but can also have an additional negative impact on the straightening rollers and thus on the straightening result. The same applies to adhering to the upper support rollers impurities.

In the operation of roller leveling machines not only cleaning operations must be carried out at certain intervals, but also include inspection, maintenance and repair work. This work is the more complex the larger the straightening machines are. Large straightening machines have heavy straightening rolls of up to 500 kg and more per straightening roll. The present invention is particularly suitable for large roll leveling machines with large and heavy leveling rolls.

The maintenance and cleaning of the support rollers requires according to the prior art, a significant amount of time. In the assembled state, in which the lower straightening rollers lie on the lower support rollers, with two support rollers support a straightening roller, to make the support rollers accessible, the straightening rollers must be removed from the straightening machine, which in particular in the above-mentioned heavy straightening rollers a caused considerable expense. For this purpose, the lower straightening rollers, which must be stored separately next to the straightening machine, are removed from the drive side at which the cardan shafts are located on the opposite side, the operator side, after removal of the bearing strip bearing the straightening rollers. Thereafter, the support rollers are freely accessible and can be moved out together with the Stützrollenböcken from the leveler - in the axial direction of the straightening rollers - inspected and cleaned. Other maintenance work, such as the relubrication of bearings can also be done.

In order to restore the operating state of the leveler, then the corresponding assembly steps must be done in reverse order.

The present invention is therefore based on the object to improve a roller leveler of the type mentioned in such a way that a much simpler and time-saving inspection, maintenance and servicing of the leveler including cleaning of the lower and upper support rollers is made possible.

It is another object of the present invention to provide a corresponding method for inspecting, maintaining and maintaining a roller leveler.

The roller leveling machine of the present invention, which is defined in claim 1, is characterized in that the lower bearing bars are detachably connectable from the lower roller mill and detachably connectable to the upper bearing bars, so that when raising the upper roller mill, the lower straightening rollers together with the upper roller Straightening rollers can be raised, and the lower support rollers are moved out together with their lower Stützrollenböcken from the straightening machine along the axis of movement of the straightening material and / or that the upper bearing strips on the lower bearing strips and detachable from the upper roll mill, whereby after lifting the upper roll mill the upper support rollers together with their upper Stützrollenböcken along the axis of the movement of the straightening material are moved out.

Thus, the great advantage is achieved that in a quick and easy way and in particular by means of the existing drive on the one hand, a method of lower leveling rolls is made possible upwards, whereby the free accessibility of the lower support rollers is enabled and on the other hand, a free accessibility of the upper support rollers is created in that the upper bearing strips are detachable from the upper roller mill and can be stored on the lower bearing strips. The straightening rollers remain in the straightening machine.

Advantageously, these are bolted to the upper bearing strips for lifting the lower bearing strips.

The connection of the two bearing strips takes place, for example, in that angle rails are provided as connecting elements between the lower bearing strips and the upper bearing strips, one angle rail each being arranged in a respective lateral end section of the lower bearing strips and the upper bearing strips.

Alternatively, the detachable connection can be realized that are provided as connecting elements of the lower bearing strips with the upper bearing strips connecting plates on the outer longitudinal side of the lower and upper bearing strips, which are releasably connected by screws with the lower and upper bearing bar.

In a further advantageous alternative embodiment, a positive releasable connection of the lower bearing strips with the upper bearing strips is provided by displaceable wedge-shaped connecting elements, each of which is slidably mounted in a groove in the lower bearing bar and each in a notch of the upper bearing bar for temporary connection Both bearing strips can be inserted.

The movement of the wedges can be done hydraulically, electrically or pneumatically.

• Lösen der Verbindung der unteren Lagerleisten (10) mit dem unteren Walzenstuhl (5),
• Verbinden der unteren Lagerleisten (10) mit den oberen Lagerleisten (8),
• Anheben des oberen Walzenstuhls (3) mittels der Antriebe (17),
• Herausfahren der unteren Stützrollen (15) zusammen mit ihren Stützrollenböcken (16) entlang der Achse (45) der Bewegung des Richtmaterials,
• Durchführen der Inspektions-, Wartungs- und/oder Reinigungsarbeiten an der Richtmaschine und den in Frage kommenden unteren Stützrollen (15),
• Zurückfahren der unteren Stützrollenböcke (16) mit den unteren Stützrollen (15),
• Absenken des oberen Richtaggregats (3) auf das untere, wodurch die unteren Richtwalzen (9) wieder auf den unteren Stützrollen (15) zu liegen kommen,
• Lösen der Verbindungen der unteren Lagerleisten (10) mit den oberen Lagerleisten (8), und
• Verbinden der unteren Lageleisten (10) mit dem unteren Walzenstuhl (5),
  oder
• Ablegen der oberen Lagerleisten (8) auf den unteren Lagerleisten (10),
• Lösen der Verbindung der oberen Lagerleisten (8) von dem oberen Walzenstuhl (3),
• Anheben des oberen Walzenstuhls (3),
• Herausfahren der oberen Stützrollen (20) zusammen mit ihren oberen Stützrollenböcken (25) entlang der Achse (45) der Bewegung des Richtmaterials,
• Durchführen der Inspektions-, Wartungs- und/oder Reinigungsarbeiten an der Richtmaschine und den in Frage kommenden oberen Stützrollen (20),
• Zurückfahren der oberen Stützrollenböcke (25) mit den oberen Stützrollen (20),
• Absenken des oberen Walzenstuhls (3) auf den unteren Walzenstuhl (5), und
• Verbinden der oberen Lagerleisten (8) mit dem oberen Walzenstuhl (3).

The present invention also includes a method of inspecting, servicing, and maintaining a roller leveling machine as defined above. This procedure includes the following steps:

• Releasing the connection of the lower bearing strips (10) with the lower roller mill (5),
• Connecting the lower bearing strips (10) to the upper bearing strips (8),
• Lifting the upper roller frame (3) by means of the drives (17),
• Extending the lower support rollers (15) together with their Stützrollenböcken (16) along the axis (45) of the movement of the straightening material,
• Performing the inspection, maintenance and / or cleaning work on the leveler and the eligible lower support rollers (15),
• Retracting the lower support roller blocks (16) with the lower support rollers (15),
• Lowering the upper leveling unit (3) on the lower, whereby the lower straightening rollers (9) come back to lie on the lower support rollers (15),
• Releasing the connections of the lower bearing strips (10) with the upper bearing strips (8), and
• Connecting the lower layer strips (10) to the lower roller frame (5),
  or
• Placing the upper bearing strips (8) on the lower bearing strips (10),
• Releasing the connection of the upper bearing strips (8) from the upper roller mill (3),
• Lifting the upper roller frame (3),
• Extending the upper support rollers (20) together with their upper Stützrollenböcken (25) along the axis (45) of the movement of the straightening material,
• Performing the inspection, maintenance and / or cleaning work on the leveler and the eligible upper support rollers (20),
• Retracting the upper support roller blocks (25) with the upper support rollers (20),
• Lowering the upper roller mill (3) on the lower roller mill (5), and
• Connecting the upper bearing strips (8) with the upper roller mill (3).

This method thus allows for a quick inspection, maintenance and service procedure including cleaning of the lower support rollers while avoiding the disassembly and reassembly of the lower leveling rollers.

It is particularly advantageous that all upper and lower straightening rollers and the associated bearing strips can remain in the straightening machine, whereby the disadvantages of the prior art are overcome. Thus, this method is particularly suitable for large straightening machines with large and heavy straightening rollers.

It is advantageous that the upper bearing strips and the lower bearing strips are screwed together via connecting elements, such as angle bars or connecting plates. This only requires very simple connection elements. Alternatively, the upper bearing strips and the lower bearing strips can be releasably connected together by means of connecting wedges.

When retracted, the support roller blocks can also be easily exchanged.

Fig. 1

eine schematische perspektivische Ansicht einer vorteilhaften Ausführungsform einer erfindungsgemäßen Walzenrichtmaschine in Arbeitsstellung;

Fig. 2

die erfindungsgemäße Walzenrichtmaschine von Fig. 1 in Lüftungsstellung mit angehobenen Richtwalzen;

Fig. 3

die erfindungsgemäße Walzenrichtmaschine von Fig. 2 in Lüftungsstellung mit angehobenen Richtwalzen und ausgefahrenen Stützrollen;

Fig. 4

eine schematische Ansicht der unteren Stützrollenböcke mit je 6 Stützrollen auf denen die unteren Richtwalzen lagern;

Fig. 5

eine perspektivische Ansicht der oberen und unteren Stützrollenböcke mit den darin gelagerten Stützrollen ohne dazwischen liegende obere und untere Richtwalzen;

Fig. 6

eine schematische perspektivische Ansicht der mittels Winkelschienen verbundenen oberen und unteren Lagerleisten einer Seite der Richtmaschine;

Fig. 7

eine schematische Teilansicht einer alternativen Verbindungslösung der oberen und der unteren Lagerleiste in unverbundenem Zustand;

Fig. 8

die schematische Teilansicht der alternativen Verbindungslösung gemäß Fig. 7 der oberen und der unteren Lagerleiste jedoch in verbundenem Zustand;

Fig. 9

eine schematische Ansicht auf die Richtwalzen von oben, gelagert in den oberen und unteren Lagerleisten sowie auf die schematisch dargestellten Stützrollenblöcke mit den Stützrollen;

Fig. 10

eine perspektivische Ansicht der erfindungsgemäßen Walzenrichtmaschine gemäß Fig. 1, bei der die oberen Lagerleisten auf die unteren Lagerleisten abgesenkt sind und der obere Walzenstuhl nach oben angehoben ist;

Fig. 11

eine perspektivische Ansicht der erfindungsgemäßen Walzenrichtmaschine von Fig. 10, jedoch mit herausgefahrenen Stützrollenböcken;

Fig. 12

eine perspektivische Teilansicht auf die erfindungsgemäße Walzenrichtmaschine von Fig. 10 mit einer Montagevorrichtung für die oberen Stützrollenböcke; und

Fig. 13

eine schematische Mitansicht durch einen unteren Stützrollenbock mit einem integrierten Rollenbock.

Further details, features and advantages of the present invention will become apparent from the following description with reference to the drawings. It shows:

Fig. 1

a schematic perspective view of an advantageous embodiment of a roller leveler according to the invention in working position;

Fig. 2

the roller leveler of the invention Fig. 1 in ventilation position with raised straightening rollers;

Fig. 3

the roller leveler of the invention Fig. 2 in ventilation position with raised straightening rollers and extended support rollers;

Fig. 4

a schematic view of the lower support roller blocks with 6 support rollers on which store the lower straightening rollers;

Fig. 5

a perspective view of the upper and lower support roller blocks with the support rollers mounted therein without intermediate upper and lower straightening rollers;

Fig. 6

a schematic perspective view of the connected by means of angle rails upper and lower bearing strips one side of the straightening machine;

Fig. 7

a schematic partial view of an alternative connection solution of the upper and lower bearing bar in unconnected state;

Fig. 8

the schematic partial view of the alternative connection solution according to Fig. 7 However, the upper and lower bearing strip in the connected state;

Fig. 9

a schematic view of the leveling rolls from above, stored in the upper and lower bearing strips and on the support roller blocks shown schematically with the support rollers;

Fig. 10

a perspective view of the roller leveler according to the invention Fig. 1 in which the upper bearing strips are lowered onto the lower bearing strips and the upper roller frame is raised upwards;

Fig. 11

a perspective view of the roller leveler of the invention Fig. 10 but with retracted support roller blocks;

Fig. 12

a partial perspective view of the roller leveler of the invention Fig. 10 with a mounting device for the upper support roller blocks; and

Fig. 13

a schematic view through a lower support roller block with an integrated roller block.

In the figures, like elements are designated by the same reference numerals.

In Fig. 1 perspective view of a roller leveling machine 1 according to the invention is shown. The roller leveler 1 has conventionally an upper roller mill 3 and a lower roller mill 5. The upper roller mill 3 comprises an upper straightening unit, which, as particularly clear from Fig. 9 can be seen formed from top straightening rollers 7, stored in upper bearing strips 8 and upper support rollers 20 for supporting the upper straightening rollers 7, wherein the upper support rollers 20 are mounted in upper support roller blocks 25.

The roller leveler 1 further comprises a lower straightening unit, the lower straightening rollers 9, mounted in lower bearing strips 10, and lower support rollers 15, which in turn are mounted in lower Stützrollenböcken 16. The upper and lower straightening rollers 8, 10 are driven by propeller shafts 11, which in turn are in connection with a not shown and conventional drive device 13. By the propeller shafts 11, it is possible to move both the upper and the lower straightening rollers 7, 9 in the vertical direction, without the propeller shafts 11 would have to be decoupled from the straightening rollers 7, 9.

Each lower straightening roller 9 is supported by two support rollers 15 of the lower support roller block, wherein in the illustrated embodiment, four support roller blocks 16 and thus eight rows of support rollers 15 are present. This will be more specific with reference to the Fig. 4 . 5 and 9 will be described below.

In Fig. 1 the upper support roller blocks 25 are covered with trim panels 19.

In the four corners of the rectangular straightening machine 1 are located in a conventional manner hydraulic actuators 17, which allow both raising and lowering of the upper roller mill 3 and a tilting to adjust the straightening gap of the upper straightening unit relative to the lower straightening unit.

As an alternative to the hydraulic drives and electric motor drives can be provided.

In Fig. 1 the operating position of the straightening machine 1 is shown for straightening. The upper bearing strips 8 are spaced from the lower bearing strips 10. In the following Fig. 2 . 3 . 10 . 11 and 12 the roller leveler 1 according to the invention is shown in a position in which the upper bearing strips 8 rest on the lower bearing strips 10 and the lower bearing strips 10 are connected to the upper bearing strips 8.

The method according to the invention for inspecting, servicing and maintaining a roller leveling machine will now be described below.

How out Fig. 2 As can be seen, the lower bearing strips 10 were released from lower support plates 41 of the lower leveling unit and connected to the upper bearing strips 8 and raised with these by means of the roll mill 3 upwards. The lifting is done by the drives 17th

By raising the lower bearing strips 10, the lower straightening rollers 9 mounted therein are also raised and release the lower support rollers 15 and thus their support roller blocks 16. The particular advantage of this arrangement is also that a conventional roller straightening machine is equipped with such drives 17, so that for lifting the lower bearing strips 10 together with the lower straightening rollers 9 only a connection of the lower bearing strips 10 must be accomplished with the upper bearing strips 8.

In Fig. 3 It is shown how the lower support roller blocks 16 can be moved out of the roller leveler 1. For this purpose, support roller bracket supports 57, which are formed from triangular angle rails, attached to a machine bed 6 of the lower roller frame 5 and can be pulled out on the lower running surfaces 59, with reference to the Fig. 4 and 13 is described

The retraction of the lower support roller blocks 16 together with their lower support rollers 15 takes place in the axial direction 45 of the movement of the Richtguts. This gives the particular advantage that removal of straightening rollers 10 is no longer necessary, whereby the present invention is particularly well suited for roll straightening machines with large and heavy upper and lower straightening rollers 8, 10.

For fixing the entire roller leveler 1 relative to the ground corresponding bolts 21 may be provided.

Reference will now be made to Fig. 4 in which the bottom straightening rollers 9 are shown mounted in the lower bearing strips 10 schematically in a view from below. The lower straightening rollers 9 are supported on the support rollers 15, which are rotatably mounted in the lower Stützrollenböcken 16. As can be seen, the set of lower straightening rollers 9 according to Fig. 4 a total of five lower straightening rollers 9, wherein each two support rollers 15 support a supporting roller block 16 a lower straightening roller 9 and support. Support rollers 15, which support a lower straightening roller 9, are alternately arranged on the two sides of the lower support roller blocks 16, as more clearly Fig. 5 evident.

To more easily move the lower support roller blocks 16 along the support roller bracket 57, the lower support roller blocks 16 in the region of their end portions on Roltenblöcke 61.

With reference to Fig. 13 These rolling blocks 61 are described in more detail. In a housing 63 is a coil spring, at the lower end of a bearing block 65 is mounted, which serves to support a rotatable roller roller 67. As soon as the lower straightening rollers 9 are lifted by means of the lower bearing strips 10, the roller block 61 is relieved, since no weight of the lower straightening rollers 9 lies more on the support roller blocks 16 and thus on the rolling blocks 61. As a result, the prestressed rollers 67 can lift the rolling block 61 and thus lift the entire support roller block 16. This allows the support roller blocks 16 in a simple and easy way, as in Fig. 3 shown, rolled out of the roller leveler 1 by means of the support roller bracket 57 and rolled and driven back into or rolled.

In Fig. 5 are shown in perspective and schematically next to the lower Stützrollenböcken 16 and the upper support roller blocks 25. If the lower support roller blocks 16 each have six support rollers 15 for supporting five lower leveling rollers 9, then the upper support roller blocks each have five support rollers 15 which are used to support four upper leveling rollers (in FIG Fig. 5 not shown) serve.

Reference will now be made to Fig. 6 in which an embodiment of the present invention is shown schematically. In the example shown, the upper bearing bar 8 and the lower bearing bar 10 are connected to one another via an angle rail 29, namely screwed by means of screws 30. The lower bearing strip 10 is in the operating position with a support plate 41 by means of screws (not shown), which extend through through holes 51 in the support plate 41 and engage in corresponding threads of the bearing strip 10.

For insertion of the screws in the respective through hole 51 lateral recesses 47 and openings or pockets 49 are provided in the support plate 41, in which also appropriate tools for tightening the screws or for releasing the screws can engage to the in Fig. 6 to get shown state.

The upper bearing bar 8 is screwed in a similar manner by means of screws 53 which are located in lateral recesses 47 and in an opening 49 or pocket 49, with a retaining plate 39. The in the embodiment according to Fig. 6 made "division" of the storage of straightening rolls in an actual storage bar and a lower support or upper plate has the advantage that a corresponding reduction in weight when lifting the lower bearing strips 10 is made possible together with the lower straightening rollers 9, each lifting a corresponding force - and energy required.

At the top of the holding plate 49 guide pins 55 are arranged, which serve to fix the position of the holding plate from the upper roller mill 3. By means of screws 56, the holding plate 49 can be secured to the upper roller mill 3.

With the embodiment according to Fig. 6 Thus, an extremely simple and robust connection possibility of the lower bearing bar 10 with the upper bearing bar 8 is created.

For the replacement of the upper or lower straightening rollers 8 or 10, it is necessary to remove the corresponding bearing bar 8 or 10. Depending on the size and weight of the corresponding bearing bar 8 or 10, this can be taken by hand by means of handle 37, with a larger weight a corresponding crane device can attack the handles 37.

Reference will now be made to FIGS. 7 and 8 in which a partial schematic view of an alternative connection solution of the upper and lower bearing strips 8 and 10 in the unconnected state according to Fig. 7 and in the connected state according to Fig. 8 is shown. The upper and lower bearing strips 8 and 10 are shown schematically and have bearing openings 27 which are for receiving the upper and the lower straightening rollers 8 and 10 serve. A wedge-shaped connecting element 31 has a T-shaped projection 32 which is received in a corresponding groove in the lower bearing strip 10 and is longitudinally movable in it. A wedge-shaped portion 34 is provided which is engageable by displacement of the wedge-shaped connecting portion 31, with a notch 35 which is located in the lower region of the side wall of the upper bearing bar 8.

The movement of the wedge-shaped connecting element 31 from a disengaged position into an engaged position and back can take place by means of suitable drives, hydraulically, electrically or pneumatically.

In Fig. 9 is schematically shown a top view of the upper and lower straightening unit, wherein it is seen that four upper straightening rollers 7 and five lower straightening rollers 9 are provided, the four upper straightening rollers 7 in the upper bearing strips 8 and the five lower straightening rollers 9 in the lower bearing strips 10 are stored. Each straightening roller 7 and 9 has a propeller shaft 43, which serves for connection to a corresponding propeller shaft, which serves to drive the corresponding straightening roller. As can be seen, the upper support roller blocks 25 each have five support rollers 20, which are arranged correspondingly offset, of which the respective outer two serve to support an upper straightening roller 7 and the middle three support rollers 20 for supporting two upper straightening rollers 7. In Fig. 9 The reference numeral 45 indicates the axis of movement of the straightening material, and the lower support roller blocks 16 and the upper support roller blocks 20 are movable parallel to this axis 45.

In the FIGS. 1 to 3 It is shown how the lower support roller blocks 16 can be moved out with its support rollers 15 from the roller leveler 1 according to the invention. In the following FIGS. 10 to 12 the retraction of the upper support roller blocks 25 together with the upper support rollers 20 is shown.

In Fig. 10 the upper bearing strips 8 have been placed on the lower bearing strips 10, wherein the upper straightening rollers 7, the lower straightening rollers 9 do not touch and thus the bearing strips 8 continue to carry the entire weight of the upper straightening rollers 9.

The bearing strips 8 are separated from the holding plate 39 by loosening the screws 53 (FIG. Fig. 6 ) has been separated and by means of the hydraulic drives 17, the upper roller mill 3 has been moved upwards and thus gives access to the upper support roller blocks 25 free. In Fig. 11 the state is shown when the upper support roller blocks 25 are moved out of the roller leveler.

In Fig. 12 schematically a movement aid means 69 for the upper support roller blocks 25 is shown. It is formed from two individual angle rails 71, each having an upper running surface 72 on which the support rollers 20 can roll. In the vertical legs 73 of the angle rails 71 maintenance openings 75 are present in front of or behind the upper support rollers 20 come to lie in the defined end position. The end position is defined for example by projecting at the end of the respective tread 72 pins 77, which also prevent further rotation of the support roller blocks 25. In this defined end position (in Fig. 12 not yet shown) can then be done from outside a lubrication of the bearing of the support rollers 20.

In the illustrated embodiments, "split" bearing strips are shown, which are divided into actual bearing strips 8 and 10 and retaining plates 39 and support plates 41. Alternatively, and depending on the design, these may also be integrally formed, wherein the solubility of the bearing strips of the respective roll mill is crucial.

The present invention thus provides a method and a roller straightening machine with which a simple and quick maintenance, repair and / or cleaning of the support roller blocks and the support rollers of both the upper straightening rollers 7 and the lower straightening rollers 9 is made possible.

LIST OF REFERENCE NUMBERS

• 1 - Roll straightening machine
• 3 - upper roller mill
• 5 - lower roller chair
• 6 - machine bed
• 7 - upper straightening rollers
• 8 - upper bearing strips
• 9 - lower straightening rollers
• 10 - lower bearing strips
• 11 - Cardan shafts
• 13 - drive device
• 15 - lower support rollers
• 16 - lower support roller blocks
• 17 - hydraulic drives
• 19 - Cover panels
• 20 - upper support rollers
• 21 - bolt
• 25 - upper support roller blocks
• 27 - bearing opening
• 29 - angle rail
• 30 - screws
• 31 - wedge-shaped connecting element
• 32 - T-shaped approach
• 33 - groove
• 34 - wedge-shaped section
• 35 - notch
• 37 - handle
• 39 - retaining plate
• 41 - Support plate
• 43 - PTO shaft
• 45 - axis of movement of the straightening material
• 47 - lateral recess
• 49 - opening
• 51 - Through hole
• 53 - screw
• 55 - screw
• 57 - Support roller bracket
• 59 - lower tread
• 61 - Roller block
• 63 - housing
• 65 - storage block
• 67 - rolls
• 69 - Movement assistance device
• 71 - angle rail
• 72 - upper tread
• 73 - vertical leg
• 75 - Maintenance opening
• 77 - projecting pin

Claims (12)

1. Roller levelling machine (1) for levelling material to be levelled, in particular strips and parts made of metal, comprising
   an upper roller frame (3) on which an upper levelling unit is arranged,
   a lower roller frame (5) on which a lower levelling unit is arranged,
   wherein the upper roller frame (3) can be moved upwards and downwards with respect to the lower roller frame or machine bed by means of a plurality of preferably hydraulic drives (17),
   a plurality of upper and lower levelling rollers (7 and 9), wherein the upper levelling rollers (7) are mounted in upper bearing strips (8) and the lower levelling rollers (9) are mounted in lower bearing strips (10), and
   a plurality of upper and lower support rollers (20, 15) for supporting the upper and lower levelling rollers (7 and 9), wherein the upper and lower support rollers (20, 15) for their part are mounted in a plurality of upper support roller blocks (25) and lower support roller blocks (16),
   characterized in that
   the lower bearing strips (10) are designed to be releasable from the lower roller frame (6) and to be releasably connectable to the upper bearing strips (8) such that, when lifting the upper roller frame (3), the lower levelling rollers (9) can be lifted together with the upper levelling rollers (7), and the lower support rollers (15), together with their lower support roller blocks (16), can be moved out of the levelling machine (1) along the axis (45) of movement of the material to be levelled, and/or in that the upper bearing strips (8) can be set down on the lower bearing strips (10) and can be released from the upper roller frame (3), with the result that, after lifting the upper roller frame (3), the upper support rollers (20), together with their upper support roller blocks (25), can be moved out along the axis (45) of movement of the material to be levelled.
2. Levelling machine according to Claim 1, characterized in that the lower bearing strips (10) can be screwed to the upper bearing strips (8).
3. Levelling machine according to Claim 1 or 2, characterized in that angle rails (29) are provided as connecting elements between the lower bearing strips (10) and upper bearing strips (8), wherein each angle rail is arranged in a respective lateral end portion of the lower bearing strips (10) and the upper bearing strips (8).
4. Levelling machine according to Claim 1 or 2, characterized in that the connecting elements for connecting the lower bearing strips (10) to the upper bearing strips (8) are provided in the form of connecting plates at the outer longitudinal side of the lower and upper bearing strips (10, 8), which connecting plates are releasably connected to the lower and upper bearing strip (10, 8) by means of screws.
5. Levelling machine according to Claim 1, characterized in that a positive releasable connection between the lower bearing strips (10) and the upper bearing strips (8) is provided by means of displaceable wedge-shaped connecting elements (31), of which each is displaceably mounted in a groove (33) in the lower bearing strip (10) and can in each case be inserted into a notch (35) of the upper bearing strip (8) in order to temporarily connect the two bearing strips.
6. Levelling machine according to Claim 5, characterized in that the wedges are displaced hydraulically, electrically or pneumatically.
7. Levelling machine according to one of Claims 1 to 6, characterized in that the upper bearing strips (8) each have a holding plate (39) which is releasably connected to the associated upper bearing strip (8), wherein the holding plates (39) are connected to the upper roller frame (3).
8. Levelling machine according to one of Claims 1 to 7, characterized in that the lower bearing strips (10) each have a support plate (41) which is releasably connected to the associated lower bearing strip, wherein the support plates (41) are connected to the lower roller frame (5).
9. Method for inspecting, servicing and maintaining a roller levelling machine (1) which comprises an upper and a lower roller frame (3, 5), wherein the upper roller frame (3) comprises an upper levelling unit and the lower roller frame (5) comprises a lower levelling unit, wherein the upper roller frame (3) can be moved upwards and downwards with respect to the lower roller frame (5) by means of a plurality of preferably hydraulic drives (17), a plurality of upper and lower levelling rollers (7 and 9), wherein the upper levelling rollers (7) are mounted in upper bearing strips (8) and the lower levelling rollers (9) are mounted in lower bearing strips (10), and comprises a plurality of upper and lower support rollers (20, 15) for supporting the upper and lower levelling rollers (7 and 9), wherein the upper and lower support rollers (20, 15) for their part are mounted in a plurality of upper support roller blocks (25) and lower support roller blocks (16), wherein the method comprises the following steps:

   - releasing the connection between the lower bearing strips (10) and the lower roller frame (5),

   - connecting the lower bearing strips (10) to the upper bearing strips (8),

   - lifting the upper roller frame (3) by means of the drives (17),

   - moving out the lower support rollers (15), together with their support roller blocks (16), along the axis (45) of movement of the material to be levelled,

   - carrying out the inspection, servicing and/or cleaning work on the levelling machine and the relevant lower support rollers (15),

   - moving back the lower support roller blocks (16) with the lower support rollers (15),

   - lowering the upper levelling unit (3) onto the lower one, with the result that the lower levelling rollers (9) come to lie again on the lower support rollers (15),

   - releasing the connections between the lower bearing strips (10) and the upper bearing strips (8), and

   - connecting the lower bearing strips (10) to the lower roller frame (5),
   or

   - setting the upper bearing strips (8) down on the lower bearing strips (10),

   - releasing the connection between the upper bearing strips (8) and the upper roller frame (3),

   - lifting the upper roller frame (3),

   - moving out the upper support rollers (20), together with their upper support roller blocks (25), along the axis (45) of movement of the material to be levelled,

   - carrying out the inspection, servicing and/or cleaning work on the levelling machine and the relevant upper support rollers (20),

   - moving back the upper support roller blocks (25) with the upper support rollers (20),

   - lowering the upper roller frame (3) onto the lower roller frame (5), and

   - connecting the upper bearing strips (8) to the upper roller frame (3).
10. Method according to Claim 9, characterized in that the upper bearing strips (8) and the lower bearing strips (10) are screwed to one another via connecting elements.
11. Method according to Claim 9, characterized in that the upper bearing strips (8) and the lower bearing strips (10) are releasably connected to one another in a positive manner by means of displaceable wedge-shaped connecting elements (31).
12. Method according to one of Claims 9 to 11, characterized in that it also comprises the arbitrary replacement of individual support roller blocks (16, 25) independently of other support roller blocks.

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