EP1294503A1

EP1294503A1 - Section straightening machine

Info

Publication number: EP1294503A1
Application number: EP01960267A
Authority: EP
Inventors: Hans Georg Hartung; Werner Kohlstedde; Markus Willems; Hans-Jürgen Reismann; Manfred Riffelmann; Ulrich Svejkovsky; Stefan Ernst
Original assignee: SMS Demag AG
Current assignee: SMS Siemag AG
Priority date: 2000-06-21
Filing date: 2001-06-02
Publication date: 2003-03-26
Anticipated expiration: 2021-06-02
Also published as: US20050056068A1; WO2001097992A1; PL200536B1; US20030172703A1; PL359005A1; KR100690272B1; ATE302074T1; JP2003535697A; DE50107132D1; KR20030007897A; US7159431B2; CZ303487B6; US6843091B2; EP1294503B1; ES2244642T3; DE10029387A1

Abstract

A section straightening machine is operated by a method which involves passing the structural sections through the array of straightening tools. Section straightening forces are applied to adjustable shafts carrying the tools and adjusters at the service sides of the shaft applying forces acting counter to the section straightening forces.

Description

Profile straightener

The invention relates to a straightening machine for straightening profiles, such as rolled beams or similar section steel, which above and below the pass line in the transport direction of the straightening material has a plurality of tools arranged on mutually parallel, driven straightening shafts, of which the upper straightening shafts can preferably be adjusted to adjust the straightening gap are.

The need to eliminate multi-axis deviations from the required profile results from the fact that the profiles, e.g. H-, U- or T-beam, after rolling onto a cooling bed. Here they remain for cooling down to a temperature of approx. 60 ° C. Due to the upstream rolling process and in particular also due to the cooling, the profiles warp both vertically and horizontally and can also twist about their longitudinal axis. In addition to the geometrical non-uniformity of the rolling stock, the consequences are internal stresses in the material, which become even clearer when the profile is divided.

The use of profile straightening machines, especially those that are common for thick-walled profiles, created a two-axis flatness by subjecting the profile to alternating bending on some surfaces with the help of straightening rollers or tools arranged above and below the straightening material in the pass line of the transport direction , The tools generally consist of straightening disks attached to bushings, which are mounted on straightening shafts each arranged in the same axis with a preset pitch or at a certain distance from one another. The alternate bends then ideally lead to an improvement in straightness in the vertical and also in the horizontal direction. It is known here for straightening, for example, H-beams (cf. EP D1 0 472 765), at least one of the two bearing on the carrier flanges from the inside and carried by the straightening shaft Adjust the aligning washers axially and in this way change the outside or chamber dimensions of the aligning washers.

Since the straightening result for rod material, profiles or similar rolled supports depends essentially on the rigidity of the entire straightening machine, the known straightening machines consist of a multi-part stand in welded construction or a stand made of a combined cast and welded construction. The straightening machines, which are designed in a pure welded construction, are usually designed in such a way that two side stands are connected to one another by means of a lower and an upper traverse. As a cast / welded construction, two solid, cast slabs are welded together.

In a profile straightening machine which has become known from DE 28 23 526 C2, the two side stands arranged one behind the other in the direction of travel of the rod material are formed in a portal-like manner by a further upright stand spar attached to the ends of the horizontal stand spars, while C-legs from there also have intermediate supports at their ends are connected to each other by a pull tab. The reason for this massive stand construction is that the straightening forces can be absorbed in a closed system. However, the stiff, solid column designs required due to the increased requirements for the leveling accuracy therefore require material-intensive and therefore costly components. Due to their size, the mechanical processing of these components must also be carried out on large, expensive processing machines which are not available everywhere.

The invention is therefore based on the object of creating a profile straightening machine of the type mentioned which, despite a simple, lightweight construction, is capable of spring-ups and / or straightening gaps, regardless of the different straightening forces for the different profiles reduce and overall reduce the loads introduced into the machine, in particular the bearing loads.

This object is achieved according to the invention in that the straightening shafts can be adjusted individually and an actuating means engaging on the straightening shaft ends is assigned to them on both sides, wherein in straightening operation at least the operating side adjusting means remote from the drive side is acted upon by a force opposing the straightening force. The adjustment means preferably engage from below on the preferably individually adjustable upper alignment shafts. It has hereby been achieved that the straightening forces can be absorbed over a short distance between the bearing chocks or units of the upper and lower straightening shafts, because force transmission means can be provided which guide the forces from the bearing chock to the bearing chock or from the bearing unit to the bearing unit , A closed frame can therefore be completely dispensed with and the machine weight can thus be reduced considerably. Since the straightening forces no longer have to be absorbed by a closed frame construction, which must also have a sufficiently high rigidity, no frame widenings can occur due to the measure according to the invention of a so-called frameless straightening machine. Because, despite the high rigidity of the known profile straightening machines implemented in a closed frame construction, each stand has a spring constant, which is disadvantageous for the straightening process, since the stand evades under load.

According to an advantageous embodiment of the invention, the hydraulic cylinders are used as adjusting means for the vertical adjustment of the upper straightening shafts or the tools carried by them. This opens up the possibility that the profile to be straightened can run in when the tools are slightly open and that the straightening shafts can also be adjusted under load during the straightening process. According to an alternative, electro-mechanically loadable spindles are used as the adjusting means. The employment takes place here in a known manner by means of worm gear, but no adjustment can be carried out under load.

In the case of a construction of a profile straightening machine with conventionally overhung straightening shafts, according to the invention the drive-side adjusting means is subjected to pressure and the tool or operator-side adjusting means to absorb the straightening forces which occur. In the case of adjusting spindles, the tooth flanks are loaded in opposite directions accordingly. In the case of advantageously used hydraulic cylinders, it is proposed that the hydraulic cylinder on the tool side be larger than the hydraulic cylinder on the drive side. This allows the larger or smaller forces to be set due to the different lever ratios.

In another version of the standless, i.e. The tool is no longer arranged on the straightening shafts between the adjustment means on the straightening machine, which no longer has a closed frame construction. While the straightening force occurs outside of the stand and truss construction in a conventional flying bearing of the straightening shafts, the bilateral mounting of the tools carried by the straightening shafts enables more favorable bending conditions to be achieved with a better introduction of the straightening forces via the lower straightening shafts and the base frame receiving them , As a result, the straightening tools are not so far apart, since the rather high proportion of shaft deflection in flying bearings is eliminated, so that the adjustment dimensions can be maintained without adversely affecting the straightening result. Due to the tool mounting on both sides, the alignment axis bearings can be smaller than in the case of a flying bearing, and because of the central alignment area, hydraulic cylinders of the same size can be used.

An advantageous embodiment of the invention when the tool is supported on both sides provides that the straightening shafts are formed in two parts and the tools are constructed in sandwich construction, the drive-side direction shaft part is clamped to the operator-side directional shaft part via the sandwich tool using a tie rod. For the straightening shafts including the tool, more compact units can be achieved in which there is a bushing between the drive-side and the operator-side straightening shaft part for receiving the tools or straightening disks. A tried-and-tested, high-prestressed sandwich connection serves as a secure connection of these components, which can both transmit the drive torques and help to absorb the bending forces to be expected.

According to a very advantageous proposal in this embodiment of the invention, the adjustment means connected to the bearing chock of the operator-side directional shaft part are arranged on a linearly movable base frame which also has the bearing units of the operator-side lower directional shaft parts. The two-sided mounting of the tools according to the invention enables the tool frame or tool to be carried out with different profiles to be aligned due to the displaceability of the base frame. Straightening wheel change in a short time. After moving or moving the operator-side base frame, the straightening machine is open and the tools of all existing straightening shafts are freely accessible.

A proposal of the invention therefore provides that a movable manipulator, which is designed with means for simultaneously holding all tools, is assigned to the straightening shafts. This can be a ground vehicle or a crane vehicle, it being possible to design an interchangeable traverse with, for example, pliers for gripping the tools. The pliers manipulator thus enables short changing times when changing profiles.

Finally, it is proposed according to an embodiment of the invention that the drive-side directional shaft end or part with its roller bearings is arranged in a piston of a cylinder housing of a hydraulic axial adjustment unit consisting of two parts. This enables another is a play-free determination of the axial position of the upper and lower straightening shafts.

Further details and advantages of the invention result from the claims and the following description of exemplary embodiments of the invention illustrated in the drawings. Show it:

1 shows a profile straightening machine - in the example designed as a nine-roll

Straightener - viewed from the front, from the operating or tool side;

FIG. 2 is a partial view of FIG. 1 showing two lower and one upper straightening shaft with tool;

3 shows a section along the line III-III of FIG. 2;

Figure 4 shows a section along the line IV-IV of Figure 2;

FIG. 5 shows another embodiment of a profile straightening machine, which has a bearing for the straightening shafts on both sides of the tool, as a sectional partial view through an upper straightening shaft unit, comparable to the sectional profile according to FIG. 3;

FIG. 6 shows a sectioned partial view through a lower straightening shaft unit in a profile straightening machine with the tool being supported on both sides, comparable to the section of FIG. 4;

Figure 7 in partial longitudinal section as a detail of the straightening machine construction according to Figures 5 and 6, an embodiment of the drive-side straightening shaft with a hydraulic axial adjustment; FIG. 8 is a top view of an embodiment of a manipulator device for simultaneously changing all the tools of a nine-roll profile straightening machine in the exemplary embodiment;

FIG. 9 the manipulator device according to FIG. 8 seen from the front; and

Figure 10 as a detail in longitudinal section a multi-part tool.

According to FIG. 1, a profile straightening machine 1 has four upper straightening shafts 2a and five lower straightening shafts 2b. The lower straightening shafts 2b are accommodated in bearing chocks 3, which are supported on a floor support 4, while the upper straightening shafts 2a are arranged in bearing chocks 3, which are provided by cylinder eyes 5 (see FIGS. 2 and 3) Bottom bracket 4 supporting hydraulic cylinders 6 and 7 are worn.

As can be seen in more detail in FIGS. 3 and 4, the directional shaft end 8 and 9 facing both the drive side I and the operating or tool side II, both the upper and the lower directional shafts 2a and 2b, are mounted in the bearing chocks 3 , and the straightening shafts 2a and 2b accommodate the tools 11 equipped with upper and lower straightening disks 10a and 10b for straightening, for example, a hot-rolled H-beam, with floating bearings. In order to compensate for height differences due to different profiles, different straightening disk diameters and wear on the tools 11 or the upper and lower straightening disks 10a, 10b, the exemplary embodiment - cf. 1 - the entire profile straightening machine 1 can be raised and lowered via an electromechanical adjusting or lifting device 13 anchored to the foundation 12 via spindles 14 acting on the base support 4.

Each upper and lower straightening shaft 2a or 2b can be driven individually via motors 15 provided on the drive side I and intermediate gears 16. In addition, there are drives 17 for the axial adjustment of the straightening shafts 2a and 2b arranged. The hydraulic cylinders 6 and 7, which enable a single adjustment of the upper straightening shafts 2a and thus serve as adjustment means, are in the construction of the profile straightening machine 1 shown in FIGS. 1 to 4 with the tools 11 in a floating position for receiving the straightening force FR acting in the direction of the arrow 18 (cf. 3) is loaded differently, namely the operating or tool-side hydraulic cylinder 6 is subjected to tension in the direction of the arrow 19 and the drive-side hydraulic cylinder 7 is subjected to pressure in the direction of the arrow 20. In the hydraulic cylinders 6 on the tool side, Pmax thus prevails in the respective upper cylinder spaces and in the hydraulic cylinders 7 on the drive side, Pmax in each case in the lower cylinder spaces (cf. FIG. 3). If, instead of the hydraulic cylinders 6, 7, adjusting spindles were used as adjusting means, their tooth flanks would be loaded in opposite directions accordingly.

Due to the hydraulic cylinders 6, 7 acting from below on the straightening shaft ends 8 and 9 of the respective upper straightening shafts 2a, the straightening forces (arrow 18) are absorbed over a short distance between the bearing units, for which purpose as a connection between the respective bearing chocks 3 and the adjacent hydraulic cylinders 6 a force transmission means 40 (in the example a bolt) is provided (cf. also FIG. 2). A closed frame construction or a closed stand system required with the previous profile leveling machines can thus be dispensed with. Rather, it is sufficient to arrange the straightening shafts 2a and 2b in only chocks 3. The hydraulic cylinders 6, 7 are of different sizes, which takes into account the larger or smaller forces that arise due to the different lever ratios, so that the hydraulic cylinders 6 on the tool side are larger than the hydraulic cylinders 7 on the drive side.

Of a profile straightening machine designed in a different construction, namely no longer with a floating bearing, but instead two-sided bearing of the tools 11, only one upper and one lower straightening shaft are shown in detail in FIGS. 5 and 6. These consist of two directional waves divide 21a, 21b and 22a, 22b (cf. the lower straightening shaft according to FIG. 6). Both the upper directional shaft parts 21a, 21b and the lower directional shaft parts 22a, 22b are - and in this respect in full accordance with the above-described embodiment - in bearing chocks 3 and - the respective lower directional shaft parts 22b - arranged in bearing units 103, so that it is also in In this case, no closed frame construction or closed stand construction is required. The chocks 3 of the upper directional shaft parts 21a, 21b arranged on both sides of the tool are carried both on the drive side I and on the operating side II by hydraulic cylinders 23a, 23b which serve as adjusting means and which are supported on the foundation 12 via base frames 24 and 25, respectively , Here, too - the directing force 18, which acts in the middle in this case - is absorbed by the shortest possible route, and is passed on again via connecting force transmission means in the short circuit between the bearings; the floor support or the foundation remains unaffected by the forces. The adjusting or hydraulic cylinders 23a, 23b are both acted upon by train FA according to arrow 19. The operator-side base frame 25, which is designed with bearing units 103 for the lower directional shaft parts 22a, 22b and has bearing chocks 3 for the upper directional shaft parts 21a, 21b and 22a, 22b, is movably arranged on the foundation 12, that is to say the operating side II of this type of profile straightening machine can be opened so that the tools 11 are freely accessible.

The two-sided mounting of the tools 11 by means of upper and lower straightening shafts consisting of the two directional shaft parts 21a, 21b and 22a, 22b, in conjunction with the base frame 25 which can be moved on the operator side, opens up a sandwich construction of the tools 11, which are consequently also made up of several parts an assembly bushing 26 and the alignment disks 10a and 10b carried by these above and below. A safe connection of the straightening shaft units together with the tool, consisting of the components of the two straightening shaft parts 21a, 21b or 22a, 22b and the bushings 26 with the straightening disks 10a or 10b (see also FIG. 10) arranged thereon, is used as a secure connection under one Relationship of a tie rod 27 a proven, highly prestressed sandwich connection.

The two-sided mounting of the tools 11 in a version of a profile straightening machine according to FIGS. 5 and 6 with a central force application of the straightening force and thus uniform tension distribution on both bearing chocks 3, in combination with the operator-side movable base frame 25 and the sandwich construction of the tools 11, furthermore offers a simple way of changing either worn tools 11 or when converting to another profile to be straightened. For this purpose - as shown schematically in FIGS. 8 and 9 - a manipulator or pliers manipulator 29 equipped with pliers 28 for all the tools 11 present on the profile straightening machine 100 - in the exemplary embodiment designed as a crossbar 30 which, in the manner of a crane vehicle, on a raised crane runway 31 will be followed. For the simultaneous and thus quick change of all tools 11 or bushings 26, only the highly prestressed sandwich connections need to be loosened, so that manipulator 29 with its pliers 28 can then take over all bushings 26 or tools 11 simultaneously. The movable base frame 25 is then moved hydraulically into the change position, ie the operating side II of the profile straightening machine 100 is opened, the manipulator 29 then following with a time delay and initiating the automatic change. The bushings 26 with the used straightening disks 10a and 10b are deposited in position 32 of FIG. 8 and the new tools provided in position 33 are adopted and brought into their position in the profile straightening machine 100 by moving the manipulator 29 or the traverse 30. As soon as the movable base frame 25 is moved again and the profile straightening machine 100 is closed and the sandwich connections are tightened, the profile straightening machine 100 is ready for operation again in a short time. The preparation of the new tools to be exchanged can take place in a construction site 34 arranged in the feed area of the crane runway 31. FIG. 7 shows, using the example of two-part aiming shafts, an alternative embodiment of the axial aiming shaft adjustment in the form of a hydraulic unit. On the straightening shaft part 21a, a cylinder housing 35 is formed on its end located on the drive side I, which accommodates a piston 36a, 36b consisting of two parts, the two piston parts 36a, 36b simultaneously enclosing the roller bearings 37, 38 of the straightening shaft part 21a. By applying pressure to either one or the other cylinder chamber 39a or 39b via controllable hydraulic connections (not shown), the directional shaft part 21a can be displaced axially horizontally and thus a play-free determination of the axial position of the directional shafts can be achieved.

Regardless of the design of the profile straightening machine, i.e. with flying storage or double-sided storage of the tools, so the adjusting means (hydraulic cylinders or adjusting spindles), which preferably engage the upper straightening shafts from below, allow an opposing force to be applied to at least the adjusting means on the operator side, which makes it possible to absorb the straightening forces in the shortest possible way to dispense with a closed frame or stand construction of the straightening machine and to exploit the considerable advantages described.

Claims

claims

1. Straightening machine for straightening profiles, such as rolled beams, which has a plurality of tools arranged on parallel, driven straightening shafts above and below the pass line in the transport direction of the straightening material, of which the upper straightening shafts can preferably be adjusted to adjust the straightening gap, characterized in that that the straightening shafts (2a; 21a, b) can be adjusted individually and an adjusting means (6, 7; 23a, 23b) acting on the straightening shaft ends (8,9; 21a, b) is assigned to them on both sides, at least in straightening operation the operator-side adjusting means (6; 23a) removed from the drive side (I) is acted upon by a force (FA) which is opposite to the straightening force (FR).

2. Straightening machine according to claim 1, marked by hydraulic cylinders (6, 7; 23a, 23b) used as adjusting means.

3. Straightening machine according to claim 1, characterized by the use of adjusting means, electro-mechanically loadable spindles.

4. straightening machine according to one of claims 1 to 3, in which the tool-carrying straightening shaft end is overhung, characterized in that the drive-side adjusting means (7) pressure and the tool-side adjusting means (6) is tensile.

5. Straightening machine according to claim 4, with hydraulic cylinders as adjusting means, characterized in that the tool-side hydraulic cylinder (6) is larger than the drive-side hydraulic cylinder (7).

6. Straightening machine according to one of claims 1 to 3, characterized in that the tool (11) between the adjusting means (23a, 23b) on the straightening shafts (21a, b; 22a, b) is arranged.

7. straightening machine according to claim 6, characterized in that the straightening shafts (21a, b; 22a, b) are formed in two parts and the tools (11) are designed in sandwich construction, the drive-side directional shaft part (21a, 22a) with the operator-side directional shaft part (21b, 22b) is clamped over the sandwich tool (11) by means of tie rods (27).

8. straightening machine according to claim 6 or 7, characterized in that with the bearing chock (3) of the operator-side directional shaft part (21b, 22b) connecting means (23a) is arranged on a linearly movable base frame (25) which is simultaneously with bearing units ( 103) for the lower directional shaft parts (22b).

9. Straightening machine according to one of claims 1 to 8, characterized in that the drive-side directional shaft end or part (9; 21a, 22a) with its rolling bearings (37, 38) in a two-part (36a, 36b) piston of a cylinder housing (35) a hydraulic axial adjustment unit is arranged.

0. Straightening machine according to one of claims 6 to 9, characterized in that the straightening shafts (21a, 21b; 22a, 22b) is assigned a movable manipulator (29) which is designed with means (27) for the simultaneous reception of all tools (11).