Abstract: 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.

Abstract: A device to process a blank (3) that includes at least one outer shaping tool (8) that may be radially positioned or radially displaced. An inner shaping tool (9) is mounted co-axially to the main machine axis (x) of the main spindle (1.1). The inner shaping tool (9) may be axially displaced and/or axially positioned with respect to the axial position of the outer shaping tools (8).

Abstract: 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.

Abstract: A method for producing workpieces wherein a substantially rotationally symmetrical workpiece (4, 9, 33), which has a workpiece axis (22), is tentered concentrically relative to an inner mandrel (3, 16) provided inside the workpiece (4, 9, 33), and is reshaped by a process of flow forming by radially applying external reshaping rollers (7). The wall thickness of the workpiece (4) is also reduced in at least some regions. The inner diameter (18, 41) of the workpiece (33) is enlarged by applying inner reshaping rollers (11) of an inner reshaping unit. The inner reshaping rollers (11) are arranged such that the roller axes of rotation and the enveloping cone (20) all intersect at one point on the workpiece axis (22).

Abstract: A device (1) for forming a hollow and at least essentially rotation-symmetric workpiece (4), having an inner forming tool (3) for supporting an inner contour of the workpiece (4) and an outer forming tool (2) for introducing a forming force into an outer contour (10) of the workpiece (4). The workpiece (4) can be rotated relative to the outer forming tool (2) around an axis of rotation (X). The device (1) has a machining tool (15) and is designed such that the machining tool (15) can act upon the outer contour (10) of the workpiece (4) at the same time as the forming tool (2) in order to insure that the diameter of the workpiece (4) is uniform before the workpiece (4) is acted upon by the forming tool (2) to prevent whip arm or curvature in the workpiece (4).

Abstract: A device for manufacturing or processing work pieces consists of a preform (4.1), with a mandrel (1a) that is supported rotatably and parallel to a longitudinal axis (x) of the device, an associated chuck (1b) for clamping the preform (4.1) as well as a spindle sleeve (2a) that can be coupled with the mandrel (1a) and can be moved along the longitudinal direction (x), and with a forming unit (3) for forming the preform (4.1). The chuck (1b) is designed in a rotational fashion in relation to the mandrel (1a).

Abstract: A method for producing workpieces wherein a substantially rotationally symmetrical workpiece (4, 9, 33), which has a workpiece axis (22), is tentered concentrically relative to an inner mandrel (3, 16) provided inside the workpiece (4, 9, 33), and is reshaped by a process of flow forming by radially applying external reshaping rollers (7). The wall thickness of the workpiece (4) is also reduced in at least some regions. The inner diameter (18, 41) of the workpiece (33) is enlarged by applying inner reshaping rollers (11) of an inner reshaping unit. The inner reshaping rollers (11) are arranged such that the roller axes of rotation and the enveloping cone (20) all intersect at one point on the workpiece axis (22).

Abstract: A device to process a blank (3) that includes at least one outer shaping tool (8) that may be radially positioned or radially displaced. An inner shaping tool (9) is mounted co-axially to the main machine axis (x) of the main spindle (1.1). The inner shaping tool (9) may be axially displaced and/or axially positioned with respect to the axial position of the outer shaping tools (8).

Abstract: A method for producing workpieces wherein a generally cylindrical preform (8) is formed by at least one pressure roller (7) into a finished workpiece (8.2). The method includes slidingly placing a portion of the preform (8) on at least a first mandrel (3, 4?) which is slidably mounted in parallel with the longitudinal axis (A) of the preform (8), aligning the mandrel (3, 4?) such that the surface (3b, 4b, 4b?) thereof disposed within the preform (8) substantially defines a negative profile of an inner surface to be formed in said preform (8), and performing a relative movement between the preform (8) and the pressure roller (7) in a direction parallel to the longitudinal axis (A) while pressing the pressure roller (7) against the preform (8) such that material of the preform (8) is displaced by the pressure roller (7) in such a way that the mandrel (3, 4?) is moved by the displaced material.

Abstract: A device for manufacturing or processing work pieces consists of a preform (4.1), with a mandrel (1a) that is supported rotatably and parallel to a longitudinal axis (x) of the device, an associated chuck (1b) for clamping the preform (4.1) as well as a spindle sleeve (2a) that can be coupled with the mandrel (1a) and can be moved along the longitudinal direction (x), and with a forming unit (3) for forming the preform (4.1). The chuck (1b) is designed in a rotational fashion in relation to the mandrel (1a).

Abstract: A method for producing workpieces wherein a generally cylindrical preform (8) is formed by at least one pressure roller (7) into a finished workpiece (8.2). The method includes slidingly placing a portion of the preform (8) on at least a first mandrel (3, 4?) which is slidably mounted in parallel with the longitudinal axis (A) of the preform (8), aligning the mandrel (3, 4?) such that the surface (3b, 4b, 4b?) thereof disposed within the preform (8) substantially defines a negative profile of an inner surface to be formed in said preform (8), and performing a relative movement between the preform (8) and the pressure roller (7) in a direction parallel to the longitudinal axis (A) while pressing the pressure roller (7) against the preform (8) such that material of the preform (8) is displaced by the pressure roller (7) in such a way that the mandrel (3, 4?) is moved by the displaced material.

Abstract: In a flow-forming method, an axially symmetrical first workpiece is fixed on a spinning mandrel, which together with the workpiece is rotated. At least one spinning roll is infed. The workpiece is formed and shaped while on an axially extending external profile of the spinning mandrel. A spacer is mounted on this spinning mandrel. A marginal area of the workpiece is shaped on an area of the spacer, the latter being plastically deformed during the shaping of the marginal area of the workpiece. Also, a flow-forming apparatus has a spinning mandrel on which a workpiece can be fixed, a drive by which the spinning mandrel and workpiece can be rotated together, and at least one spinning roll for shaping the workpiece in a forming area. The deformable spacer has an overlap area. During workpiece shaping, the overlap area at least partly overlaps with the forming area of the workpiece.

Abstract: A method for the manufacture of a machine part with external toothing from a circular sheet metal blank. According to this method the blank is fixed between a tool and a tail stock. Subsequently the circumferential edge of the circular sheet metal blank is bent by a first metal working roll towards the side of the tool by an angle of more than 180.degree. to form a curl. This curl is radially flattened with a second metal working roll. Subsequently the flattened curl is pressed against the tool with a gear cutting roll and shaped to form an external tooth system.

Abstract: In a flow-forming-machine having a rotatable spindle, a rotary drive for the spindle, and a pressure tool fitted to one of the spindle end faces, an axially movable counterpressure support for a workpiece is placed on the pressure tool, the counterpressure support being axially aligned with the spindle and having opposed sides. At least two rotatable pressure rollers are movably guided on a machine frame in a radial direction with respect to the spindle, while a pivot arm is provided on both the sides of the spindle and/or the counterpressure support. Each pivot arm is pivotal around an axis parallel to the longitudinal axis of the spindle by means of a powered drive. At least two pressure rollers are adjustably located on each pivot arm, and one of the pressure rollers is selectively positionable in an operable position and fixable at will for each pivot arm.

Abstract: A metal spinning machine with at least one roller holder, the roller holder being mounted exchangeably on a tool rest system with a roller rotatably borne by it. The tool rest system permits the roller to be displaced in at least two coordinate directions relative to a workpiece to be formed by spinning. The workpiece can be mounted on a rotatable metal spinning machine spindle with a rotationally symmetrical shaping tool. The metal spinning machine is equipped with a means limiting the force which can be exerted by the roller on the workpiece.

Abstract: Disclosed are a method, apparatus and tool for the manufacture of a deep-bed wheel rim from a hollow cylindrical preform. In the method the metal preform is shaped to the deep-bed rim in a single mounting on a single tool of several parts, and the constriction of the middle part of the preform to make the bed is performed with concentric rotation of tool and preform. The side portions of the preform are widened to make the bead flanges by a radial shifting of the axis of rotation of the preform together with a tool part shifting appropriately in the plane perpendicular to the axis of rotation to make the bed and the bead seat. The pressing at least during the widening takes place inwardly in a single radial direction, the direction of the axial shift corresponding to the pressing direction. The invention furthermore relates to an apparatus for the practice of the method. According to the invention, this apparatus is a pressing machine with two spindles which bear a tool in common.

Abstract: Process and apparatus for producing a folded seam connection along a joint between cups made of sheet metal having flanges of folded seam connection and forming a workpiece, in particular a vibration damper, wherein at least one folding tool and the workpiece with the folding flanges, which are pressed on each other, are moved relative to one another. The workpiece is rotated around a rotating axis traversing the workpiece in an essentially perpendicular manner with respect to the plane of the joint. The folded seam connection is produced by rolling over the folding flanges once or several times by at least one folding roller. In the plane of the joint, the folding roller can be swung around relative to the workpiece and/or pressed against the latter. The process and the seaming machine offer the option to simply pass over interruptions of the folded seam connections by providing a correspondingly configured guide surface for the folding roller.

Abstract: The disclosure relates to wood chippers having a chip separation surface comprising unitary ribs which, after grinding of the cutter, form chip separator tips.