EP0953385B1 - Straightening machine for rolled beams - Google Patents

Abstract

The machine comprises alignment discs which locate against the inner sides of the flanges of the section and a supported by an alignment shaft. One of the discs is firmly attached to the shaft via a mounting bush while the other can be adjusted in position and sits on an adjustable bush. The sliding bush is displaced by means of a piston unit.

Description

The invention relates to a straightening machine for rolled beams, in particular H-beams, in which at least one of the two abuts the support flanges from the inside, supported by a straightening shaft formed with a piston / cylinder unit Alignment disks is axially adjustable, the one alignment disk over a Mounting bush is firmly connected to the directional shaft while the other Alignment disk fixed in position on one on the according to its setting dimension Mounting bushing arranged displaceably - on the if necessary also several (up to three) straightening disks can be arranged - sits. Such Straightening machine according to the preamble of claim 1 is known from JP-A-9-253 750. The sliding bush will be there adjusted by a worm gear.

A profile straightener in which the outer or chamber dimensions of the Alignment disks can be changed by axially shifting one alignment disk also known from EP-B1 0 472 765. The sliding straightening disc is there on a sleeve concentrically overlapping the assembly bushing or Sliding bushing arranged. The mounting bush or sleeve is via a wedge spring connected to the straightening shaft, and another wedge spring provides the connection between the mounting bush and the outer sleeve or sliding bush. The Assembly bushing or sleeve is axially fixed by a pressure sleeve Concentrically encloses the pin end of the straightening shaft. Around this pressure sleeve is rotatable a threaded sleeve with a molded on its outer surface Thread arranged. A ring screwed onto this external thread is with the Sliding sleeve or sleeve connected to rotate relative to one Straightener frame to prevent instead rotating movement in one convert axial displacement movement of the sliding sleeve as soon as the Actuator is put into operation. Apart from an extremely complex one With this leveling disc adjustment, construction occurs more or less eccentrically large crowds.

The invention has for its object a generic straightening machine without to create the disadvantages mentioned, in particular with a simple structure To enable both the axial adjustability and the assembly and disassembly.

This object is achieved by the im Independent claim specified features solved. If only the outside or Chamber size of the straightening discs must be changed, e.g. if in Rolling program on beams with different flange thicknesses (hyper beams) or different web heights is only needed Sliding bush with the straightening disk carried by it through the piston / cylinder unit to be adjusted on the mounting socket.

If a completely different rolled profile, for example an H profile from another Beam blanks, which are transferred, are transferred to the one with the piston / cylinder unit connected sliding bush also coupled to the mounting bush, preferably via at least one pen or equal, e.g. Gag or Gwindeknebel. This can be in an aligned position from the outside radial holes of the two sockets inserted or screwed become. In this case, the entire unit can be from the directional shaft journal deduct and with a corresponding to the profile change in the rolling mill Replace the prepared unit with the set straightening discs. So that at Changing the outer or chamber dimensions can be adjusted exactly, can be A measuring device is placed on the outside of the two straightening disks. This can be equipped so that a hydraulic valve when the desired size is reached is controlled, which interrupts the movement process because the Pressurization of the piston / cylinder unit is interrupted.

A preferred embodiment of the invention provides that the sliding bush via an end with its shaft journal end on the piston rod of the piston / cylinder unit specified clamping bush rotatably connected to the straightening shaft and is axially adjustable by the piston / cylinder unit. The connection of the piston / cylinder unit, preferably arranged centrally in the directional shaft Clamping bushing producing the sliding bushing can be rotated with the straightening shaft advantageous due to a radially expandable and releasable friction element achieve that between the straightening shaft and the clamping bush on the Straightening shaft journal is arranged. Such couplings are on the market available and consist of a hollow bushing, in the interior of which a conical Ring piston can be moved hydraulically. When moving the conical The annular piston causes radial expansion, so that there is no play and non-positive connection between the clamping bush and the straightening shaft. After each assembly or disassembly, the oil is drained off again, so that no oil pressure is present in the radial expansion element during operation.

According to a proposal of the invention, one arranged on the shaft journal secures Bayonet ring the mounting bush in its set operating position, that of A counter means is associated with the shaft journal end. The bayonet ring and that Countermeasures do more than just secure the position of the straightening shaft straightened disc unit, but the one arranged in front of the bayonet ring Locking means, preferably a screw nut, also absorbs axial forces, if these are effective on the machine-side straightening disc. Axial forces in generally only act on the straightening disks from the outside during the Straightening process if such forces are caused by incorrect positioning of the straightening disc should appear from the outside, the screw nut in front of the bayonet ring.

According to a preferred embodiment of the invention is on a roller section Between a fixing ring and the bayonet ring, a hydraulic nut with a mechanical lock nut (ring). With this you can go far greater force than would be the case with a mechanical counter that Press the assembly bushing over the bayonet ring onto the straightening shaft. Subsequently the locking device or the screw nut takes over the securing of the position mounted mounting bush, the pressure of the hydraulic nut afterwards can be drained.

An advantageous variant of the invention provides that the adjustable Straightening washer on the sliding bushing temporarily securing a hydraulic unit is connected upstream. For easy positioning of the during Straightening operation, the adjustment of the sliding straightening counter mechanical Accordingly, mother becomes hydraulic in the sense of a conceptual identity with the preloaded bayonet by the hydraulic unit, which is only required on the construction site sufficient prestressing (approx. 50 t) is achieved so that the lock nut can be screwed onto the sliding bush. After preloading the straightening disc unit this hydraulic part or the clamping unit is removed again, whereupon the mechanical nut takes over the securing of the clamped position.

Fig. 1

von einer nicht dargestellten Rollenrichtmaschine als Einzelheit die auf einer Richtwelle angeordneten Richtscheiben mit Verstelleinheit, im Teilquerschnitt dargestellt;

Fig. 2

die Richtscheiben-Einheit gemäß Fig. 1 in einer Ausbauphase bei der Demontage der Richtscheiben von der Richtwelle; und

Fig. 3

als Einzelheit eine alternative Ausführung der in Fig. 1 durch einen strichpunktierten Kreis gekennzeichneten Bauteile.

Further features and advantages of the invention result from the claims and the following description, in which exemplary embodiments of the subject matter of the invention illustrated in the drawings are explained in more detail. Show it:

Fig. 1

from a roller straightening machine, not shown, as a detail, the straightening disks arranged on a straightening shaft with adjusting unit, shown in partial cross section;

Fig. 2

the straightening disk unit according to Figure 1 in an expansion phase when dismantling the straightening disks from the straightening shaft; and

Fig. 3

as a detail an alternative embodiment of the components identified by a dash-dotted circle in FIG. 1.

From a straightening machine, the upper and lower straightening shafts 1 arranged thereon Alignment discs 2, 3, is in the semi-symmetrical representation according to FIG. 1 of the straightening pin 4 of a lower straightening shaft 1 is shown. The for straightening a hot rolled H-beam 35 cooperating with the lower straightening discs 2, 3 upper directional discs 2a, 3a are only indicated schematically. On the directional pin 4 of the straightening shaft 1, a mounting bush 6 is wedged over a feather key 5, on which the rear straightening disc 2 is fixed by means of a mechanical nut 7.

The front or in Fig. 1 right-hand target 3 is in the direction of the two arrows designed to be displaceable or adjustable so that the chamber dimension 8, i.e. to change the distance between the two inner surfaces of the H-beams 35, for example when rolling beams with a different flange thickness or one other web height. For moving the straightening discs 2, 3 apart or moving them together is a sliding bushing 9 carrying the alignment disk 3 on a wedge guide 10 of the Assembly socket 6 arranged. The straightening disk 3 is supported against inserts 11, to which they move from one to the sliding bush 9 from its free end screwed mechanical nut 12 is clamped. The sliding bush 9 is via a schematically indicated screw connection 13 with a clamping bush 14 connected, which is at its shaft end on the direction of the piston rod or a piston rod head 15 arranged centrally in the directional pin 4 Piston / cylinder unit 16 is supported and fixed on it with a lock nut 17.

For the axial bracing of the mounting bush 6 on the directional pin 4 is used for Attachment to the free front end brought bayonet ring 18, which in its position of a nut 20 screwed onto a pin section 19 of the straightening pin 4 is countered. Between the pin section 19 of the directional pin 4 and Clamping sleeve 14 is a hydraulically radially expandable and relaxable Expanding element 21 arranged to move one in its interior recorded conical annular piston 22 via a hydraulic connection 23 to a Pressure medium source (hydraulic pump) can be connected. By the at Moving the annular piston 22 radial expansion creates a play-free and non-positive connection between the pin section 19 and the clamping bush 14, which is thus fixed on the directional pin 4.

If the chamber dimension 8 is to be increased, the adjustable straightening disc 3 must be open the mounting bush 6 in the direction of the arrow pointing to the right in FIG. 1 on the Wedge guide 10 are moved. This requires after stopping the straightening machine Via the hydraulic connection 23, the expansion element 21 only with one Hydraulic unit, not shown, connected and the friction between the Clamping sleeve 14 and the directional pin 4 to be lifted. Then with Piston / cylinder unit 16 to be pressurized oil then adjusts the one with the Clamping bushing 14 screwed displacement bushing 9 and the one carried by it Straightener 3 in the desired, metrologically monitored new position. As soon as then the radial expansion element 21 again hiss the frictional engagement has produced the pin section 19 of the straightening shaft 1 and the clamping bush 14, it secures the set position of the straightening disc 3. The maximum adjustment range for The straightening disc 3 can also - provided that for certain applications should be necessary - in a simple manner by extending or from the outset shortened straightening pin 4 and clamping bush 14 vary.

The disassembly of the straightening disk unit is shown in FIG. 2. In this case too it is necessary to initially expand the radial expansion element 21 into its depressurized starting position to bring, i.e. the inner wedge or conical ring piston 22 in its To move the release position so that there are no more radial expansion forces. It can then first loosen the lock nut 20, which for inserting a Round rod has a receiving bore 25, and then the bayonet ring 18 with a round rod to be inserted from the outside into a receiving bore 24 mechanically released, i.e. by 45 ° from the position shown in FIG. 1 to that shown in FIG. 2 Position can be rotated. In the exemplary embodiment in alignment with each other Bores 26 and 27 of assembly bushing 6 and displacement bushing 9 inserted Pin 28 (see. Fig. 2) - in order to achieve this cover position of the holes, the Displacement bushing 9 brought into the basic or zero position shown in FIG. 1 become - establishes the connection between these two components. By connecting the piston / cylinder unit 16 to a pressure medium source is then the piston rod 15 in that shown in Fig. 2 Expanded position extended and pulls the entire on the feather key 5 of the Straightening pin 4 guided unit from the straightening shaft 1. The piston / cylinder unit 18 thus fulfills two functions, namely the positioning of only the one Sliding sleeve 9 for chamber dimension adjustment and the other last described pulling the entire assembly from the straightening shaft 1. Die Piston / cylinder unit 16 has two controlled by a proportional valve, the speeds assigned to each function.

In the alternative embodiment shown in FIG. 3, the dot-dash line in FIG. 1 circled component is between the axially acting on the mounting bush 6 Bayonet ring 18 and a fixing ring 36, a hydraulic nut 29 is provided it allows the mounting bush 6 with greater force on the straightening shaft 1 and the Fixing pin 4, one with the lock nut 20 comparable lock nut 37 - as soon as the pressure of the hydraulic nut 29 is released has been - then the securing of the pushed-on mounting bush 6 takes over. 3 is a hydraulic unit 30 arranged on the clamping bush 14 shown, but only on the site for pre-assembly of the straightening disc unit is required to force a larger to bias the straightening discs 2, 3 to be able to muster. After the pre-assembly of the straightening disc unit, this Hydraulic unit 30 then removed again and as in FIGS. 1 and 2 shown, the mechanical lock nut 12 takes over the fixing of the Supplements 11 set clamped position of the straightening discs.

Claims (7)

1. A leveling machine for rolled carriers, in particular H-carriers (35), in which at least one of the two leveling disks (2, 3) that inwardly abut the carrier flanges and are carried by a leveling shaft (1) formed with a piston/cylinder unit (16) can be axially shifted, wherein the one leveling disk (2) is rigidly connected with the leveling shaft by a mounting bushing (6), while the second, adjustable leveling disk (3) sits counter-positioned on a sliding bushing (9) movably arranged on the mounting bushing (6) based on its reference dimension, characterized in that the piston/cylinder unit (16) is situated centrally in the leveling shaft (1), and serves both to position only the sliding bushing (9) for adjusting the chamber dimensions, and to take off the mounting bushing (6) complete with sliding bushing (9).
2. The leveling machine according to claim 1, characterized in that the sliding bushing (9) is connected torsionally resistant to the leveling shaft (1) by a clamping bushing (14) whose leveling shaft journal-side end is fixed on the piston rod (15) of the piston/cylinder unit, and can be axially adjusted by the piston/cylinder unit (16).
3. The leveling machine according to claim 1 or 2, characterized in that the sliding bushing (9) and mounting bushing (6) can be coupled by at least one pin (28).
4. The leveling machine according to one of claims 1 to 3, characterized by a bayonet ring (18) that is arranged on the leveling journal (4) and secures the mounting bushing (6) in its set operating position, to which is allocated a counter-means from the journal end.
5. The leveling machine according to claim 4, characterized in that the counter-means is a nut (20) that can be screwed onto the roller journal segment (19).
6. The leveling machine according to claim 4, characterized in that a hydraulic nut (29) with a mechanical counter-nut (37) is situated on a roller journal segment (19) between a fixing ring (36) and the bayonet ring (18).
7. The leveling machine according to one of claims 1 to 6, characterized in that a hydraulic unit (30) is temporarily placed upstream from the counter-means that secures the adjustable leveling disk (3) on the sliding bushing (9).

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