Abstract: A method for producing open-seam pipes from sheet metal panels, in particular thick sheet metal panels. A sheet metal panel, having bending edges on the long sides thereof, is fed to a pipe forming press where the sheet metal panel is formed, lying on a lower tool having of two supporting elements which are horizontally spaced apart from each other, by an upper tool, which can be raised and lowered, by application of a bending force, progressively into an open-seam pipe having bending edges on opposite long sides with a gap for later longitudinal seam welding. In order that the sheet metal panel can be easily, progressively formed or shaped from the start, at least the bending sections immediately adjacent on the bending edges of the sheet metal panel are each formed from the outside to the inside, deviating from a numerically ascending bending step sequence in a pilgering process sequence.

Abstract: A method for producing open-seam pipes from sheet metal panels, in particular thick sheet metal panels. A sheet metal panel, having bending edges on the long sides thereof, is fed to a pipe forming press, in which the sheet metal panel is formed, lying on a lower tool having of two supporting elements which are horizontally spaced apart from each other, by an upper tool, which can be raised and lowered, by application of a bending force, progressively into an open-seam pipe having bending edges on opposite long sides with a gap for later longitudinal seam welding. In order that the sheet metal panel can be easily, progressively formed or shaped from the start, at least the bending sections immediately adjacent on the bending edges of the sheet metal panel are each formed from the outside to the inside, deviating from a numerically ascending bending step sequence in the pilgering process.

Abstract: The invention relates to a method and a device for optically measuring the interior of a seamless pipe which is manufactured by rolling or of a pipe which is welded with a longitudinal seam and is manufactured from sheet-metal plates shaped to form half-shells or from a shaped sheet-metal plate or from a metal strip which is unwound from a coil, comprising a sensor means (9) which emits a laser beam (10) in the interior of the pipe (3). In such a method and device, an internal measurement of seamless pipes or pipes which are welded with a longitudinal seam is to be provided with which it is easily possible to determine and model precisely the ovalness and straightness of the pipe (3) in a station.

Abstract: In order for upsetting presses to be able to work more effectively and in more energy-optimized manner for upsetting of an end of longitudinally extending workpieces, an upsetting press for upsetting of an end of longitudinally extending workpieces has at least two longitudinally divided dies, having at least two die parts. A first one of the two die parts is disposed on a first die revolver and a second one of the two die parts is disposed on a second die revolver.

Abstract: The invention relates to a method and a device for optically measuring the interior of a seamless pipe which is manufactured by rolling or of a pipe which is welded with a longitudinal seam and is manufactured from sheet-metal plates shaped to form half-shells or from a shaped sheet-metal plate or from a metal strip which is unwound from a coil, comprising a sensor means (9) which emits a laser beam (10) in the interior of the pipe (3). In such a method and device, an internal measurement of seamless pipes or pipes which are welded with a longitudinal seam is to be provided with which it is easily possible to determine and model precisely the ovalness and straightness of the pipe (3) in a station.

Abstract: A tube extending along a tube axis is straightened by radially outwardly plastically deforming and expanding the tube by means of an expander mandrel and simultaneously bending the tube by applying radially inwardly directed forces to the tube at three points lying on a triangle. One of the points is level with the mandrel on one side of the tube and the other two points axially flank it in axially opposite directions and bear on the other side of the tube.

Abstract: A plate workpiece having an edge is bent with a press having a stationary upper die with a lower face and a vertically and horizontally movable lower die with an upper face. With the upper face of the lower die spaced below the lower face of the upper die, the workpiece is fitted between the dies such that the edge of the plate bears in a horizontal direction on the upper face of the lower die and an upper face of the plate bears upward on a portion of the lower face of the upper die. Then the lower die is moved vertically upward toward the upper die at a predetermined vertical rate while the lower die is shifted horizontally synchronously in the direction at a predetermined horizontal rate such that the plate edge engaging the lower-die upper face does not shift there along during upward movement.

Abstract: According to the invention a flat metal plate for the manufacture of pipe is first oriented generally horizontally on horizontally spaced and longitudinally extending supports. A longitudinally extending center tool is pressed down against the workpiece between the supports so as to downwardly plastically deform the workpiece while simultaneously a brace body is pressed with an upward force against the plate directly opposite the center tool so as to hold the plate in contact with the center tool. The center tool and brace body are then synchronously displaced downward relative to the supports with the plate clamped between the center tool and brace body.

Abstract: A bending press for making tubing from a substantially planar and longitudinally extending metal sheet has a support extending transversely generally parallel to the sheet vertically offset from the sheet, and a bender at one of the edges of the sheet and slidable transversely generally parallel to the sheet on the support. The bender has a pair of bending tools, a tie rod extending transversely in the direction adjacent the pair of tools, and an actuator braced transversely in the direction between the tie rod and the tools and extensible in the direction to tension the rod and press the tools against opposite faces of the sheets at the one edge to deform the one edge. A clamp is engageable between the bender and the support for releasably locking the bender to the support at any of a plurality of positions offset transversely therealong generally parallel to the sheet.

Abstract: A tube extending along a tube axis is straightened by radially outwardly plastically deforming and expanding the tube by means of an expander mandrel and simultaneously bending the tube by applying radially inwardly directed forces to the tube at three points lying on a triangle. One of the points is level with the mandrel on one side of the tube and the other two points axially flank it in axially opposite directions and bear on the other side of the tube.

Abstract: A bending press for making tubing from a substantially planar and longitudinally extending metal sheet has a support extending transversely generally parallel to the sheet vertically offset from the sheet, and a bender at one of the edges of the sheet and slidable transversely generally parallel to the sheet on the support. The bender has a pair of bending tools, a tie rod extending transversely in the direction adjacent the pair of tools, and an actuator braced transversely in the direction between the tie rod and the tools and extensible in the direction to tension the rod and press the tools against opposite faces of the sheets at the one edge to deform the one edge. A clamp is engageable between the bender and the support for releasably locking the bender to the support at any of a plurality of positions offset transversely therealong generally parallel to the sheet.

Abstract: A straightening apparatus for large diameter thick wall pipe has an expander head at one end of a beam inserted into the pipe and having a radially displaceable saddle positionable at any selected location along the beam. The saddle may be shifted along the beam by a linear actuator and the saddle applies a radial force to the inner wall of the pipe in a bending operation.

Abstract: A bending press for bending metal plates for the production of large diameter pipe has an articulation for the upper die member which reduces bending moments as applied to the bending sword or ram. The articulation can be between the upper die and the foot of the bending sword and a second articulation can be provided between the bending sword and the head of it affixed to the head of the press.

Abstract: A method and system for the controlled application of fluid pressure of a load, such as a large pipe to be pressure tested utilized small pressure converters which are operated by a common controller at the hydraulic side to fill and pressurize the pipe. One pressure converter is decelerated as it approaches the end of its working stroke while the other pressure converter is accelerated so that the total displacement of the pressurizing fluid remains substantially constant over time.

Abstract: A straightening apparatus for large diameter thick wall pipe has an expander head at one end of a beam inserted into the pipe and having a radially displaceable saddle positionable at any selected location along the beam. The saddle may be shifted along the beam by a linear actuator and the saddle applies a radial force to the inner wall of the pipe in a bending operation.

Abstract: A method and system for the controlled application of fluid pressure of a load, such as a large pipe to be pressure t sted utilized small pressure converters which are operated by a common controller at the hydraulic side to fill and pressurize the pipe. One pressure converter is decelerated as it approaches th end of its working stroke while the other pressure converter is accelerated so that the total displacement of the pressurizing fluid remains substantially constant over time.

Abstract: A bending press for bending metal plates for the production of large diameter pipe has an articulation for the upper die member which reduces bending moments as applied to the bending sword or ram. The articulation can be between the upper die and the foot of the bending sword and a second articulation can be provided between the bending sword and the head of it affixed to the head of the press.

Abstract: A mechanical pipe expander with a pyramidal polyhedron and with segments which are arranged on the circumferential surfaces of the polyhedron and can be moved radially by axially displacing the polyhedron relative to the segments. A wear lining is arranged between each of the surfaces of the polyhedron and each respective segment.

Abstract: A pipe-bending press with a large bending length in a closed frame construction, has a frame with side columns and upper and lower cross-pieces. The table supporting the lower bending tools is supported at the lower cross-piece and the upper bending tool which is guided vertically at the side columns in a parallel manner is supported via a plurality of identical piston/cylinder units arranged side by side so that the upper bending tool can be raised and lowered relative to the upper cross-piece. The cylinder spaces of the piston/cylinder units are connected to a common pressure medium unit via a common control line, and the lower piston/cylinder units are arranged between the table supporting the lower bending tools and the lower cross-piece.