A pipe connection for connecting metal thin-walled pipeline. The pipeline has a shaped connecting segment that increases from the end of the connecting segment in the form of a frustum forming a circumferential sealing surface and a shoulder defining a stop surface adjacent to the sealing surface. The pipe connection also includes a connection stub having a connection thread and a connection bore, which decreases in size and defines a circumferential connection surface for contacting the sealing surface. A union threaded part includes a clamping thread and a passage opening, which has, on the inner circumference, a circumferential clamping surface for contacting the stop surface. The cone angle of the connecting segment in the region of the sealing surface and the cone angle of the connection bore in the region of the connection surface are in the range of about 38 to 50.

A punching tool comprising a punch (42) and a die (46), in particular for manufacturing a creasing plate (24), the die having a straight recess (50) for accommodating material deformed by the punch (42), characterized in that the die (46) has an outer contour which extends, adjacent the open end of the recess (50), at an angle of less than 90 with respect to the longitudinal direction of the recess (50).

The invention relates to a method for producing a rod- or pipe-shaped connecting element (100, 100) having an end face (106) from a semi-finished connecting element (102) made of metal, in particular of a drill or chisel insertion end which is secured in an axially movable manner in a chuck of a hammer drill, a semi-finished connecting element (102) is provided, characterized in that at least one radially movable forming body (206) guided in the recesses (204) of a die (202) for forming at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) has a smaller longitudinal extension (LR) than a planned length (L) of the longitudinal groove (122, 124) and that the forming of the at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) is performed by radially applying the at least one forming body (206) and by subsequently axially shifting the semi-finished connecting element (102) in a longitudinal die opening (214) of the die (202).

The invention relates to a method for producing a rod- or pipe-shaped connecting element (100, 100) having an end face (106) from a semi-finished connecting element (102) made of metal, in particular of a drill or chisel insertion end which is secured in an axially movable manner in a chuck of a hammer drill, a semi-finished connecting element (102) is provided, characterized in that at least one radially movable forming body (206) guided in the recesses (204) of a die (202) for forming at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) has a smaller longitudinal extension (LR) than a planned length (L) of the longitudinal groove (122, 124) and that the forming of the at least one longitudinal groove (122, 124) closed on both sides in the semi-finished connecting element (102) is performed by radially applying the at least one forming body (206) and by subsequently axially shifting the semi-finished connecting element (102) in a longitudinal die opening (214) of the die (202).

An indentation tool includes an installation axis, a radially oriented indentation axis, and a defined reserved space for an indentation site of a cylindrically-shaped structure, as well as a base for installing onto the structure, and an elongate punch for indenting it at its indentation site. The reserved space is spaced apart from the installation axis, and has the indentation axis passing through it. The base extends along the installation axis, and is configured for coaxial installation onto the structure, whereby its indentation site occupies the reserved space. The punch is spaced apart from the installation axis, and is supported by the base for movement along the indentation axis between a home position, in which the punch vacates the reserved space, and an indentation position, in which the punch, leading with an indentation tip, reaches into the reserved space to indent the structure at its indentation site.

An indentation tool includes an installation axis, a radially oriented indentation axis, and a defined reserved space for an indentation site of a cylindrically-shaped structure, as well as a base for installing onto the structure, and an elongate punch for indenting it at its indentation site. The reserved space is spaced apart from the installation axis, and has the indentation axis passing through it. The base extends along the installation axis, and is configured for coaxial installation onto the structure, whereby its indentation site occupies the reserved space. The punch is spaced apart from the installation axis, and is supported by the base for movement along the indentation axis between a home position, in which the punch vacates the reserved space, and an indentation position, in which the punch, leading with an indentation tip, reaches into the reserved space to indent the structure at its indentation site.

A needle member includes: a tubular side wall through which a hollow portion extends in a longitudinal direction. An opening portion connected to the hollow portion extends laterally through the tubular side wall. The tubular side wall comprises a side wall reinforcement portion located at a position opposing the opening portion, wherein the hollow portion is interposed between the opening portion and the side wall reinforcement portion.

A device for flow-forming workpieces having a rotatable first, outer forming tool for acting upon an outer contour of a first workpiece in the form of a hollow body. The device also has a first, inner forming tool for acting upon an inner contour of the workpiece. The first workpiece can be set in rotation about a first workpiece axis and can be plastically deformed by a pressure applied by the first, inner forming tool and the first, outer forming tool in a forming zone formed between the first forming tools by the material being made to flow between the first forming tools. The device has a drive for driving the first, outer forming tool.

A device for flow-forming workpieces having a rotatable first, outer forming tool for acting upon an outer contour of a first workpiece in the form of a hollow body. The device also has a first, inner forming tool for acting upon an inner contour of the workpiece. The first workpiece can be set in rotation about a first workpiece axis and can be plastically deformed by a pressure applied by the first, inner forming tool and the first, outer forming tool in a forming zone formed between the first forming tools by the material being made to flow between the first forming tools. The device has a drive for driving the first, outer forming tool.

A height adjustment device of a motor vehicle seat and a method for the production thereof includes a transverse pipe and a pair of links. The transverse pipe has two end-side bearing regions which merge in a central region having a larger diameter and each link rests on a bearing region of the transverse pipe.