초록 ▼

The invention relates to a method and a forming apparatus for deforming a hollow tubular workpiece, wherein the workpiece is clamped down in a clamping device, a first forming tool is placed into contact with the outer surface of the workpiece, the tool is rotated about an axis of rotation relative

The invention relates to a method and a forming apparatus for deforming a hollow tubular workpiece, wherein the workpiece is clamped down in a clamping device, a first forming tool is placed into contact with the outer surface of the workpiece, the tool is rotated about an axis of rotation relative to the workpiece and one end of the workpiece is deformed by means of said first tool. A second forming tool is placed into contact with the outer surface of the workpiece and is rotated relative to the workpiece about an axis of rotation. The other end of the workpiece is deformed by means of said second tool and at least one of said tools is moved relative to the workpiece during said deformation and/or between deforming steps (On the same workpiece), wherein the axis of rotation of said tool is translated and/or pivoted about an axis with respect to said workpiece.

대표청구항 ▼

1. A method for deforming a hollow tubular workpiece, wherein the workpiece is clamped down in a clamping device, a first forming tool is placed into contact with the outer surface of the workpiece, said first forming tool is rotated about an axis of rotation relative to the workpiece and one end of

1. A method for deforming a hollow tubular workpiece, wherein the workpiece is clamped down in a clamping device, a first forming tool is placed into contact with the outer surface of the workpiece, said first forming tool is rotated about an axis of rotation relative to the workpiece and one end of the workpiece is deformed by means of said first forming tool, wherein a second forming tool is placed into contact with the outer surface of the workpiece and is rotated relative to the workpiece about an axis of rotation such that the other end of the workpiece is deformed by means of the second forming tool and that at least one of said tools is moved relative to the workpiece during said deformation and/or between deforming steps on the same workpiece, wherein the axis of rotation of at least one of said tools is translated and/or pivoted about an axis with respect to said workpiece.2. The method according to claim 1, wherein both tools are moved relative to the workpiece during said deformation and/or between deforming steps on the same workpiece, wherein the axes of rotation of said tools are translated and/or pivoted about an axis.3. The method according to claim 1, wherein at least one of said tools is pivoted about at least two axes relative to the workpiece during said deformation and/or between deforming steps, wherein at least two of said axes, or projections of each of said axes on a common plane, are at an angle with respect to each other.4. The method according of claim 1, wherein at least one of said axes is moved during said deformation and/or between deforming steps.5. The method according to claim 1, wherein the larger part of the operation is carried out in one flowing movement.6. The method according to claim 1, wherein at least one inside forming tool is placed into a cavity defined by the workpiece, at the location of at least one of the ends thereof, into contact with the inner surface of the hollow workpiece, and wherein the workpiece is deformed by means of said second forming tool.7. The hollow tubular workpiece having a continuous wall and two open ends, which have been deformed, preferably by means of the method according claim 6, in such a manner that the projections of the central axes of said ends on a plane straight through an undeformed part of the metal workpiece are at an angle of less than 180 degrees with respect to each other.8. A catalytic converter for a vehicle comprising a workpiece according to claim 7.9. A forming machine at least comprising a clamping device for clamping down a hollow tubular workpiece to be deformed, a first forming tool, which is placeable into contact with the outer surface of the workpiece while the workpiece is being worked and by means of which one end of the workpiece is deformable, driving means for rotating said first forming tool relative to said workpiece and means for moving said first forming tool relative to said workpiece in such a manner that said first forming tool follows one or more desired paths with respect to the workpiece so as to work said workpiece, at least one second forming tool, which is placeable into, contact with the outer surface of the workpiece during the machining of the workpiece, and by means of which the other end of the workpiece is deformable, as well as driving means for rotating aid second forming tool relative to said workpiece and means for moving said second forming tool relative to said workpiece in such a manner that said second forming tool follows one or more desired paths with respect to the workpiece so as to work said workpiece, wherein at least one of said tools is movable relative to the workpiece during said deformation and/or between deforming steps (on the same workpiece) in such a manner that the axis of rotation of at least one of said tools is translated and/or pivoted about an axis relative to said workpiece.10. The forming machine according to claim 9, wherein both tools are movable relative to the workpiece during said deformation and/or between deforming steps (on the same workpiece), wherein the axes of rotation of said tools are translated and/or pivoted about an axis.11. The forming machine according to claim 10, wherein at least one of said tools is able to be pivoted about at least two axes relative to the workpiece during said deformation and/or between deforming steps on the same workpiece, wherein at least two of said axes or projections of each of said axes on a common plane are, at an angle with respect to each other.12. The forming machine according to claim 11, wherein at least one of said axes is movable during said deformation and/or between deforming steps.