Straightening machine and method for straightening

Abstract

The present invention relates to a straightening machine (1) and a method for straightening a molded material, comprising a plurality of straightening rolls (3) arranged opposite each other on both sides of a straightening line, forming a straightening section, the straightening rolls being at least partially arranged on vertically extending straightening shafts (4) so ​​as to be horizontally and / or axially adjustable with respect to the molded material guided in the straightening section, characterized in that at least some of the straightening shafts (4) are formed so as to be hydraulically adjustable horizontally and / or axially.

Description

[Technical Field]

[0001] The present invention relates to a straightening machine for straightening a molded material, comprising a plurality of straightening rolls arranged opposite each other on both sides of a straightening line to form a straightening section, the straightening rolls being at least partially arranged on a vertically extending straightening axis so as to be adjustable horizontally and / or axially with respect to the molded material guided in the straightening section. [Background technology]

[0002] Basically, straightening of a profile is necessary if the profile subsequently changes its shape, for example, due to thermal distortion caused by cooling after the rolling process. For example, the use of horizontal and vertical straightening machines is known for straightening profiles such as H-profiles, U-profiles, T-profiles, I-profiles, rail profiles, etc., where the concepts of horizontal and vertical relate to the orientation of the straightening tools. A horizontal straightening machine is known, for example, from WO 2016 / 142362. This document relates to a straightening machine for straightening elongated semi-finished products, the straightening machine comprising straightening roll elements, a roll pass line formed as a conveying section, a stand device for holding the straightening roll elements relative to the conveying section, the stand device including a drive-side stand half and an operating-side stand half movable opposite the drive-side stand half, an exchange device for exchanging the straightening roll elements, and an exchange path along which the straightening roll elements are movable for exchange, in which the straightening roll elements are movable on the one hand by the operating-side stand half along a first subsection of the exchange path extending in a horizontal movement plane and on the other hand by the exchange device along another subsection of the exchange path extending in the horizontal exchange plane. The horizontal exchange plane is arranged in the region of the materially vertical extension of the operating-side stand half.

[0003] A straightening machine for straightening profiled workpieces, such as rolled steel sections, is known, for example, from EP 1294503, which has a plurality of tools arranged above and below the passing line in the conveying direction of the workpiece to be straightened, the tools being arranged on parallel driven straightening shafts, the upper of which is adjustable to adjust the straightening gap. This document also relates to a method for operating a straightening machine for straightening profiled workpieces, in which a force opposite to the straightening force is applied to at least an adjusting means on an operating side remote from the drive side during the straightening operation. The straightening machine according to EP 1294503 is configured as a horizontal straightening machine, in which each upper and lower straightening shaft can be driven individually via a motor on the drive side and an intervening transmission. Furthermore, a drive is provided for axial adjustment of the straightening shafts. Hydraulic cylinders are used as adjusting means.

[0004] In conventional vertical straighteners, adjustment is provided by electric motors for axial and / or horizontal adjustment, and force absorption is provided by a stable machine frame, also known as a stand. CN Patent Application Publication No. 107790519 discloses a straightening machine for straightening hollow profiles, which includes a stationary roller assembly and a hydraulically adjustable roller assembly, each having rollers facing each other from the outside on two sides of the profile, and these rollers act horizontally on the sides of the profile. Mounted inside the profile are opposing supports made of roller assemblies having rollers connected to each other via a four-bar linkage. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide a straightening machine of the type mentioned at the beginning, in particular a so-called vertical straightening machine, which is improved in terms of realizing the adjustment movement of the straightening tool, in particular in terms of absorbing reaction forces during straightening. In particular, the present invention aims to provide a straightening machine with a simplified structure. Furthermore, the present invention aims to provide a corresponding method for straightening a profiled workpiece. [Means for solving the problem]

[0006] The problem underlying the present invention is solved by a straightening machine with the features of claim 1 as well as by a method with the features of claim 10.

[0007] Advantageous configurations of the invention are set forth in the dependent claims.

[0008] An aspect of the present invention relates to a straightening machine for straightening profiled material, comprising a plurality of straightening rolls arranged offset from one another on opposite sides of a straightening line, forming a straightening section, the straightening rolls being at least partially arranged on vertically extending straightening shafts so as to be horizontally and / or axially adjustable with respect to the profiled material guided in the straightening section, the straightening machine being characterized in that at least some of the straightening shafts are configured so as to be hydraulically adjustable horizontally and / or axially. The straightening machine according to the present invention is configured as a vertical straightening machine and comprises a plurality of vertically extending straightening shafts, each of which has a straightening roll. Profiled material within the meaning of the present invention is, for example, an H-profile, an I-profile, a U-profile, or a T-profile, preferably a rail profile.

[0009] Preferably, the straightening rolls are arranged opposite each other and offset along the straightening line to allow alternate bending on both sides of the profile, with preferably three forming rolls each forming a force triangle.

[0010] Correction according to the present invention By machine It is envisaged that at least some of the straightening axes are configured to be hydraulically horizontally and axially adjustable, each independently.

[0011] A particularly advantageous configuration of the straightening machine according to the invention provides for at least one straightening shaft to be movably arranged for horizontal adjustment relative to the straightening line along a horizontal arc segment about a pivot axis. Unlike the prior art, the invention provides for pivot support or swing adjustment for at least part of the straightening shaft. Linear feed of the integrated element, as is customary in the prior art, is not necessary. According to the invention, the straightening shaft is adjusted via a pivot support and the associated angle change. Another drawback of the prior art, the balancing of adjustable straightening shafts or straightening axes, can be completely eliminated by this configuration.

[0012] Furthermore, it may be provided that at least one straightening shaft is pivotally supported on the machine frame of the straightening machine, which can be constructed in a simpler manner than the usual arrangement of a vertically extending straightening shaft in the bearing assembly of the stand used in the prior art.

[0013] Preferably, at least one pivotally supported straightening shaft has opposing supports on opposite sides of the straightening line.

[0014] The straightening axes may each be supported on supports extending parallel to one another on the machine frame, and preferably only the straightening axes arranged on one side of the straightening line are actively adjustable in the horizontal direction, whereas the straightening axes arranged on the opposite sides of the straightening line may be arranged stationary in one horizontal plane.

[0015] Preferably, the at least one pivotally supported straightening shaft is adjustable via at least one hydraulic piston-cylinder device pivotally mounted on the opposite side of the straightening line.

[0016] In the sense of the present invention, the straightening line means the ideal line along which the material to be straightened should extend after the straightening process. The straightening axes arranged on either side of the straightening line define the straightening section along which the material to be straightened is conveyed.

[0017] For this purpose, at least some of the straightening axes are preferably driven individually. This has the advantage, among other things, that the straightening machine can continue to operate if one drive fails, which is not possible with the integrated drives typically used elsewhere. Via the individual drives, the torque and speed distribution can also be controlled individually for each straightening axis. This data can be linked to corresponding data regarding the horizontal and / or axial adjustment, which can be detected via corresponding paths of the hydraulic adjusting cylinders and / or force and / or position sensors. According to the invention, at least one control device for the adjustment force and / or position of at least one straightening axis, preferably of all straightening axes, is provided individually.

[0018] A particular advantage of the straightening machine mechanism according to the invention is that the machine frame can be designed to be extremely rigid, so that deflections of the machine frame during straightening are small and therefore an effective force flow occurs during straightening.

[0019] The hydraulically adjustable individual straightening shafts allow the forces of the straightening process to be detected. The uneven force distribution of the individual straightening rolls allows direct inferences regarding the straightening process and the precisely adjusted axial positions of the individual straightening rolls or straightening shafts.

[0020] Another aspect of the present invention relates to a method for straightening a formed material in a straightening machine, the method comprising the step of straightening the formed material with a plurality of straightening rolls on vertically extending straightening shafts, the straightening shafts being adjusted at least partially individually and independently of one another in the straightening section on both sides of the straightening line while applying a straightening force horizontally and / or axially towards the formed material.

[0021] The method according to the invention provides for the active adjustment of some of the straightening rolls, while other parts of the straightening rolls only passively absorb the straightening forces, and these straightening rolls are not horizontally adjustable but are axially adjustable.

[0022] Preferably, the straightening rolls arranged on one side of the straightening line are actively adjustable, whereas the straightening rolls provided on the opposite side of the straightening line are passively adjustable.

[0023] A particularly preferred embodiment of the invention provides for adjusting the straightening rolls via pivot supports or so-called swing adjustment, which is a shear-like feed movement of the straightening rolls or straightening shafts, so that the resistance forces are particularly well introduced into the machine frame.

[0024] The method according to the invention further preferably provides for driving the straightening rolls and / or straightening shafts individually.

[0025] The adjusting force and / or adjusting position of the straightening roll can be detected by a pressure transmitter and / or a position transmitter and / or can be open-loop controlled and / or closed-loop controlled.

[0026] The method according to the invention is characterized in particular by the use of a straightener having the characteristics described above.

[0027] The invention will now be described with reference to illustrative embodiments. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a plan view showing a straightener according to the present invention; [Figure 2] FIG. 2 is an enlarged view of a portion of FIG. [Figure 3] FIG. 1 is a perspective view of a straightener according to the present invention shown with rail formations extending inside the straightener. [Figure 4] FIG. 3 is an enlarged view of a portion of FIG. 2. [Figure 5] FIG. 2 is a partially cutaway perspective view of the straightener. [Figure 6] FIG. 1 is a side view of a partially cutaway straightener. [Figure 7] FIG. 2 is an enlarged cross-sectional view showing the straightening shaft and the straightening roll at the exit end of the straightening machine according to the present invention. [Figure 8] FIG. 2 is a cross-sectional view showing the straightening shaft and roll of the straightening machine according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0029] The straightening machine 1 shown in FIG. 1 has a machine frame 2 with a number of straightening tools in the form of straightening rolls 3, which are arranged on a vertically extending straightening shaft 4. In the view according to FIG. 1, the straightening rolls 3 form a straightening section that is aligned with the roll passage line 5 of the straightening machine. The straightening rolls 3 are arranged offset from one another in the straightening section. The machine frame 2 can be moved transversely relative to the roll passage line 5 via sliding cylinders 10, which are hydraulic piston-cylinder units, so that it can be moved out of the roll passage line 5 or into it as needed. The straightening machine 1 shown in the example is designed as a vertical straightening machine. For example, horizontal straightening machines can be arranged before and after this straightening machine on the roll passage line 5. The straightening machine 1 has an inlet guide 6 and an outlet guide 8 for a rail profile 7. The rail profile 7 is shown, for example, in FIG. 3. In the position shown in FIG. 3, the rail profile extends into the straightening section formed by the straightening rolls 3. Ideally, the straightening rolls 3 are applied to the profile sides 9 of the rail profile 7 on both sides of the straightening line defined by the rail profile 7 .

[0030] The straightening machine 1 according to the present invention has a total of eight straightening rolls 3 as straightening tools, each of which is arranged on a straightening shaft 4 so as not to be rotatable relative to one another. The machine frame 2 includes bearing carriers 11 extending parallel to the straightening line and supports 12 arranged on one side of the bearing carriers 11, which supports are arranged so as to be movable along rails 13 by means of sliding cylinders 10. The supports 12 are connected by a beam 14 extending parallel to the straightening line. The supports 12 each hold an inlet guide 6 and an outlet guide 8.

[0031] As can be seen from FIG. 2 , below the roll passage line 5 in the drawing plane, three straightening rolls 3 or straightening shafts 4, i.e., the straightening rolls 3 arranged below the roll passage line 5 in FIG. 2 , are arranged rotatably about a vertical pivot axis 23 (extending into the drawing plane). The straightening roll 3 arranged closest to the exit guide 8 of the straightening machine 1 is exclusively linearly movable in the horizontal direction relative to the straightening line and is not rotatable. The four straightening rolls 3 arranged above the roll passage line 5 in the drawing plane of FIG. 2 are horizontally stationary. However, all straightening rolls 3 are movable or hydraulically adjustable in the axial direction (i.e., axially on axes extending into the drawing plane of FIGS. 1, 2, and 4 ), as will be explained further below. The straightening rolls 3 are arranged offset and opposite each other along the straightening line to enable alternate bending on both sides of the rail profile 7. In this case, three straightening rolls 3 each form a force triangle, and two straightening rolls 3 arranged at a distance from one another and located above the roll passage line 5 in the drawing plane form fixed opposing supports for the swing adjustment of the opposing straightening roll 3 arranged below or between these straightening rolls.

[0032] According to the invention, it is envisaged that the horizontal adjustment movement of some of the straightening rolls 3 as well as the vertical or axial adjustment movement of all of the straightening rolls 3 are both effected hydraulically. As already mentioned above, the straightening rolls 3 following the inlet guide 6 perform an active adjustment movement along a horizontal arc section about a vertical pivot axis 23 on one side of the straightening line or on one side of the roll passage line 5, while the respective opposing straightening roll 3 is supported in this respect in a stationary bearing carrier 11.

[0033] As can be seen particularly from the diagram in FIG. 5, each of the pivotally movable straightening rolls 3 is arranged non-rotatably on a correspondingly movable straightening shaft 4, which is pivotally mounted by means of a bearing element 15 on a tie rod 16, the end of which faces away from the straightening shaft 4 forming the piston 17 of a hydraulic cylinder 18, which is pivotally mounted by means of a pin 19 on the bearing carrier 11 on the side facing away from the straightening shaft 4 in a bearing casing 20.

[0034] The pressure load of the cylinder 18 containing hydraulic fluid causes the tie rod 16 to move transversely relative to the rail profile 7, and thus the straightening roll 3 to move in the direction toward the profile side 9 of the rail profile 7 facing the straightening roll 3. In this case, the straightening roll 3 moving along the arc section exerts a straightening force transverse to the straightening line or transverse to the longitudinal extension of the rail profile 7 on the profile side 9 of the rail profile 7 facing the straightening roll 3. A corresponding counterforce is exerted by the adjacent opposing straightening roll 3 on the profile side 9 of the opposing rail profile 7.

[0035] A view in the direction of the straightening line or roll pass line 5 showing the relative positions of the two straightening axes 4 or two opposing straightening rolls 3 with respect to the rail profile 7 is shown in FIG.

[0036] In the described embodiment, the straightening rolls 3 are each applied against the profile side 9 of the rail profile 7. However, it should be understood that the invention also allows the straightening machine 1 to be configured in such a way that the profile to be straightened, in this case the rail profile 7, can also be guided by the straightening rolls 3 so that it can also be straightened about an axis with a greater moment of resistance.

[0037] As already mentioned above, each straightening shaft 4 can be driven by an individual motor 21 via an angle drive 22 .

[0038] As already noted above, all straightening shafts 4 in the embodiments described above are hydraulically adjustable in the axial direction, but it may also be envisaged within the scope of the present invention that one or the other straightening shaft 4 is axially fixed or supported in such a way that it is not axially adjustable.

[0039] Due to the fact that each straightening shaft 4, together with the straightening rolls 3 arranged on this shaft and fixedly fixed relative to each other, can be hydraulically adjusted individually in the axial and / or radial direction, the individual positions of the straightening rolls 3 in the axial and horizontal directions can be detected via corresponding position sensors, and their adjusting forces can be determined via corresponding pressure measuring devices, and controlled in an open-loop and / or closed-loop manner. The adjusting forces can be determined via a central closed-loop and open-loop control device. From the detected adjusting forces, it is possible to directly estimate, for example, whether all straightening rolls 3 are axially aligned and correctly positioned relative to the rail profile 7.

[0040] 3 and 5, the pivotable arrangement of part of the straightening shaft 4 provides a swinging or shearing adjustment movement that is relatively favorable in terms of the counterforces that must be applied to the machine frame 2. This allows the machine frame 2 to be constructed relatively easily and at the same time with high stability. [Explanation of symbols]

[0041] 1 straightening machine 2 Machine Frame 3 Straightening roll 4 Correction axis 5 Roll passing line 6. Entry guide 7 Rail forming material 8 Starting guide 9 Molded material side 10 Sliding cylinder 11 Bearing carrier 12 Support 13 Rail 14 Beam 15 Bearing materials 16 tie rod 17 Piston 18 cylinders 19-pin 20 Bearing casing 21 Motor 22 Angle Drive 23 Vertical pivot

Claims

1. A straightening machine (1) for straightening a molded material, comprising a plurality of straightening rolls (3) arranged opposite to each other and offset from each other on both sides of a straightening line, forming a straightening section, the straightening rolls being at least partially arranged on a vertically extending straightening shaft (4) so ​​as to be horizontally and / or axially adjustable with respect to the molded material guided in the straightening section, At least some of the straightening shafts (4) are configured to be individually hydraulically adjustable horizontally and / or axially, The straightening machine (1) is characterized in that at least one straightening axis (4) is movably arranged for horizontal adjustment relative to the straightening line along a horizontal arc segment about a vertical pivot axis (23).

2. 2. The straightening machine (1) according to claim 1, wherein at least one straightening shaft (4) is pivotably supported in a machine frame (2) of the straightening machine (1).

3. 3. The straightening machine (1) according to claim 2, wherein the at least one straightening shaft (4) is held in at least one swivel bearing of the machine frame (2).

4. 2. The straightening machine (1) according to claim 1, wherein the at least one pivotally supported straightening shaft (4) has opposing supports on opposite sides of the straightening line.

5. 2. The straightening machine (1) according to claim 1, wherein the at least one pivotally supported straightening shaft (4) is adjustable via at least one hydraulic piston-cylinder device pivotally mounted on the opposite side of the straightening line.

6. 2. The straightening machine (1) according to claim 1, wherein at least some of the straightening shafts (4) are individually driven.

7. 2. The straightening machine (1) according to claim 1, wherein at least one adjusting force control and / or position control of at least one straightening axis (4) is performed.

8. 2. The straightener (1) according to claim 1, which is configured as a vertical straightener.

9. 1. A method for straightening a formed material in a straightening machine (1), comprising the step of straightening the formed material by means of a plurality of straightening rolls (3) on vertically extending straightening shafts (4), the straightening shafts being adjusted at least partially individually and independently of one another in the straightening section on both sides of the straightening line, hydraulically applying a straightening force horizontally and / or axially towards the formed material, 10. The method of claim 9, wherein at least one straightening axis (4) is movably arranged for horizontal adjustment relative to said straightening line along a horizontal arc segment about a vertical pivot axis (23).

10. 10. The method according to claim 9, wherein at least some of the straightening rolls (3) are adjusted via pivot supports.

11. 10. The method according to claim 9, wherein the straightening rolls (3) are each driven individually.

12. 10. The method according to claim 9, wherein the straightening rolls (3) arranged on one side of the straightening line are actively adjustable in the horizontal direction, whereas the straightening rolls (3) arranged on the opposite side of the straightening line are supported stationary in the horizontal direction.

13. 10. The method according to claim 9, wherein the adjusting force and / or the adjusting position of the straightening roll (3) is detected and / or controlled by a pressure transmitter and / or a position transmitter.

14. 14. Method according to any one of claims 9 to 13, using a straightening machine (1) with the features of any one of claims 1 to 8.

Images