METHOD FOR PRODUCING A BENT TORSIONAL PROFILE AND TORSIONAL PROFILE

Abstract

The invention relates to a method for producing a bent torsional profile comprising the following process steps: a) provision of a plate made of planar sheet metal, b) reshaping of the plate through the introduction of a bent trough oriented in the longitudinal direction of the plate in a central length portion (6) of the plate at a distance from the front edges of the plate, forming legs between the trough and the longitudinal edges of the plate, c) reshaping of the legs in such a manner that an open profile is created, d) reshaping of the legs in such a manner that a hollow profile is produced, wherein a longitudinal gap is formed between the two legs over the entire longitudinal extent thereof and wherein an air gap is created between the legs and the trough in the region of the trough, e) joining of the two legs over the entire longitudinal gap.

Claims

1. A method for producing a bent torsional profile comprising the following process steps: a) provision of a plate made of planar sheet metal, b) reshaping of the plate through the introduction of a bent trough oriented in the longitudinal direction of the plate in a central length portion of the plate at a distance from the front edges of the plate, forming legs between the trough and the longitudinal edges of the plate, c) reshaping of the legs in such a manner that an open profile is created, d) reshaping of the legs in such a manner that a hollow profile is produced, wherein a longitudinal gap is formed between the two legs over the entire longitudinal extent thereof and wherein an air gap is created between the legs and the trough in the region of the trough, e) joining of the two legs over the entire longitudinal gap.

2. The method as claimed in claim 1, wherein the longitudinal edges of the plate are provided with a bend which corresponds to the bend of the trough.

3. The method as claimed in claim 2, wherein the longitudinal edges of the plate are provided with a bend before the provision or first reshaping of the plate.

4. The method as claimed in claim 2, wherein the longitudinal edges of the plate are provided with a bend between process steps b) and c), c) and d) or d) and e).

5. The method as claimed in claim 1, wherein the plate is reshaped in process step c) in such a manner that the open profile has a roughly w- or M-shape in the central length portion and a roughly u- or n-shape between the front edges and the trough.

6. The method as claimed in claim 1, wherein the plate or the open profile is reshaped in process step d) in such a manner that a butt joint or an overlap joint is produced between the two legs on the longitudinal edges, on which the longitudinal gap is formed, thereby creating the hollow profile.

7. The method as claimed in claim 1, wherein the plate or else the open profile is reshaped in process step d) in such a manner that the hollow profile has a roughly V-shape in the central length portion and a roughly O-shape in the portions between the trough and the front edges.

8. The method as claimed in claim 1, wherein the introduction of the trough takes place by means of deep-drawing and/or stretch-forming and/or embossing-raising.

9. The method as claimed in claim 1, wherein the plate is made of steel, in particular a high-strength or maximum-strength steel.

10. The method as claimed in claim 1, wherein the joining of the two legs over the entire longitudinal gap takes place by means of welding, soldering, adhesion or by a mechanical joining process.

11. A torsional profile produced according to a method as claimed in claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In the drawing:

[0029] FIG. 1: shows an exemplary embodiment of a plate made of a sheet metal for producing a torsional profile according to the invention in plan view,

[0030] FIG. 2: shows the plate in FIG. 1 with the trough introduced in plan view,

[0031] FIG. 3: shows the plate with the trough introduced according to FIG. 2 in side view,

[0032] FIG. 4: shows an exemplary embodiment of a method according to the invention for producing a bent torsional profile with seven cross-sectional representations through the plate during different process steps,

[0033] FIG. 5: shows an exemplary embodiment of a torsional profile according to the invention in perspective view and

[0034] FIG. 6: shows a cross-sectional representation of the torsional profile in FIG. 5 in the region of the trough.

DETAILED DESCRIPTION

[0035] FIG. 1 shows an exemplary embodiment of a plate 2 made of sheet metal 3 for producing a bent torsional profile 1 in plan view. The plate 2 in this case has two longitudinal edges 13, 14 arranged substantially parallel to one another and oriented in the longitudinal direction 14 of the plate 2, which are already provided with a bend or curve. This bend or curve substantially corresponds in this case to the bend or curve which should be exhibited by the torsional profile 1 being produced. To this extent, these bends or curves of the longitudinal edges 13, 14 may also be regarded as a curved contour of the plate 2. Alongside the longitudinal edges 13 and 14, the plate still has two front edges 9 and 10 which each run from the one longitudinal edge 13 to the other longitudinal edge 14 and are arranged at an acute angle in respect of one another.

[0036] The plate in FIG. 1 is shown in a further plan view in FIG. 2 wherein, however, in a central length portion 6 of the plate 2, a curved trough 5 is already arranged which is arranged in the longitudinal direction 4 of the plate 2 and is at a distance 7, 8 from the respective front edges 9, 10 in each case. The trough 5 is likewise spaced apart from the longitudinal edges 13 and 14, so that between the longitudinal edges 13, 14 and the curved trough 5 a leg 11, 12 is formed in each case. The bend or curve of the trough 5 corresponds as already seen with the bend or curve of the longitudinal edges 13, 14 substantially to the bend or curvature which should be exhibited by the torsional profile 1 being produced.

[0037] In FIG. 3 the plate 2 provided with the trough 5 in FIG. 2 is shown in side view along its longitudinal extent according to the longitudinal direction 4. The two front edges 9, 10 and also the one longitudinal edge 13 on which the eye directly falls in this representation can clearly be seen here. Likewise clearly shown in this depiction are the distances 7, 8 by which the trough 5 is spaced apart from the front edge 9, 10 in each case.

[0038] The depiction in FIG. 4 shows seven process steps of an exemplary embodiment for the production of a curved torsional profile 1 in cross-sectional depictions which are labelled using the Roman numerals I to VII.

[0039] Starting from the depiction of step I, a planar plate 2 in the form of a planar metal sheet 3 is supplied. The plate 1 in this case is pre-cut to the longitudinal edges 13, 14 and corresponds to the plate 2 shown in FIG. 1.

[0040] In step II the plate 2 is reshaped in the region of the two ends between the front edges 9, 10 that cannot be seen here and the central length region 6 in such a manner that a ledge 19 is created in each case. By deep-drawing and/or stretch-forming, the plate 1 is reshaped in such a manner that an open profile 15 with a channel running in the longitudinal direction 4 of the plate 2 is produced, as shown in step III.

[0041] In step IV the channel is formed in the counter-direction and has a curved shape which corresponds to that of the curved trough 5 in FIG. 2.

[0042] The legs 11, 12 of the plate 2 running alongside the central trough 5 are then reshaped in the direction of the trough 5, as shown in step V.

[0043] Following this, the legs 11, 12 of the plate 2 are further reshaped, wherein a hollow profile 16 with a longitudinal gap 17, as depicted in step VI, is created. The air gap 18 between the legs 11, 12 and the walls of the trough 5 can already be identified here, said air gap extending over the entire longitudinal extent of the central length portion 6, through which contact of the legs 11, 12 and the walls of the trough 5 and therefore subsequently noise generation due to the rubbing of the legs 11, 12 against one another and the walls of the trough 5 is prevented.

[0044] A closed hollow profile or the completely bent torsional profile 1 is finally produced by welding the longitudinal gap 17 or else the edge butt joint of the legs 11, 12, wherein a weld joint 20 connecting the two legs 11, 12 is produced, as shown in step VII. This depiction also clearly shows the air gap 18 through which contact between the legs 11, 12 and the walls of the trough 5 and therefore a subsequent noise generation through the rubbing of the legs 11, 12 against one another and the walls of the trough 5 is prevented.

[0045] FIG. 5 shows an exemplary embodiment of a bent torsional profile 1 according to the invention in a perspective representation, wherein the trough 5 can clearly be seen.

[0046] The depiction in FIG. 6 shows a cross section through the torsional profile 1 in FIG. 5 in the region of the trough 5. What can clearly be seen in this case is the air gap 18 that is formed between the legs 11, 12 and the walls of the trough 5, through which contact between the legs 11, 12 and the walls of the trough 5 and therefore subsequently noise generation through a rubbing of the legs 11, 12 against one another and the walls of the trough 5 is prevented. Furthermore, the joining seam 20 between the longitudinal edges 13, 14 of the legs 11, 12 can also be seen. List of reference numbers [0047] 1 Torsional profile [0048] 2 Plate [0049] 3 Sheet metal [0050] 4 Longitudinal plate direction [0051] 5 Trough [0052] 6 Length portion [0053] 7 Distance [0054] 8 Distance [0055] 9 Front edge [0056] 10 Front edge [0057] 11 Leg [0058] 12 Leg [0059] 13 Longitudinal edge [0060] 14 Longitudinal edge [0061] 15 Profile [0062] 16 Hollow profile [0063] 17 Longitudinal gap [0064] 18 Air gap [0065] 19 Ledge [0066] 20 Joining seam