Abstract: The invention describes a method of producing a sinter-hardened component from a metallic powder containing chromium which is pre-alloyed in particular, comprising the steps of compacting the powder to form a green compact and then sintering the green compact in a reducing sintering atmosphere at a sintering temperature in excess of 1100° C. A gas containing carbon is added to the sintering atmosphere.

Abstract: A power assist element for arrangement in a synchronizer hub of a transmission synchronization device includes a base body, which has a height, a longitudinal extension and a lateral extension, and which in the direction of the longitudinal extension comprises includes two opposite, distal end sections. In at least one end section a functional surface is formed, which in the installed state cooperates with the synchronizer hub. On the base body between the two distal end sections a central elevation is formed for engagement in a sliding sleeve groove on a bottom of a sliding sleeve. The central elevation includes at least one additional functional surface which can be brought into active connection with the sliding sleeve. The functional surface in the distal end section(s) is at an acute angle to the greatest longitudinal extension of the base body and oriented at an angle to the longitudinal extension.

Abstract: The invention relates to a toothed wheel arrangement (1) comprising a main toothed wheel (2) and a toothed wheel (4) that can be rotated relative thereto in the circumferential direction (3), wherein the main toothed wheel (2) comprises a toothed wheel body (25) on which a hub (5) is arranged in a projecting manner in the axial direction so as, firstly, to accommodate a shaft and, secondly, to arrange the rotatable toothed wheel (4) thereon, for which purpose the rotatable toothed wheel (4) has a cutout (17) coaxial to an axially extending center axis of the main toothed wheel (2), and wherein the main toothed wheel (2) is connected to the rotatable toothed wheel (4) by means of a bayonet fastening (14). The bayonet fastening (14) is formed between the hub (5) and the rotatable toothed wheel (2) and/or between the hub (5) and a spring element (9) bearing on the rotatable toothed wheel (4).

Abstract: The invention describes a method of compacting the surface of a sintered part (2), whereby a sintered part (2) is moved in a die (1) along an axis (3) in a pressing direction (20) through several die portions (7, 8, 9) from a first die portion (7) at a first die orifice (6) into a last die portion (9), and a wall surface (16) of each die portion (7, 8, 9) forms at least one pressing surface (18) against which a contact surface (17) formed by an external surface (12) of the sintered part (2) is pressed, and an internal contour (25) defined by the pressing surface (18) lying in a cross-section by reference to the axis (3) at least approximately corresponds to an external contour (26) defined by the contact surface (17).

Abstract: The invention relates to a toothed wheel (1) having a sequence of X teeth (4), wherein each N-th tooth (4) at least partially has a smaller tooth rigidity compared to the remaining X-N teeth (4), N being a number which is selected from a range with a lower limit of 2 and an upper limit of X, in particular X/2, or wherein a number of M teeth at least partially have a smaller tooth rigidity than the remaining X-M teeth, where M is selected from a range with a lower limit of 1 and an upper limit of X?1 or an upper limit of X provided that at least individual teeth are divided or all the teeth have a different geometry, and/or wherein the tooth system (3) has a pitch in which each Nth tooth (4) stands out compared to the remaining X-N teeth (4).

Abstract: The invention relates to a tool for compacting the surface of a component (2) produced by powder metallurgy, comprising a mold (1) and a stamp (20), wherein in the mold (1) a recess (5) is provided which extends from a first mold opening (6) to a second mold opening (8), and which has a wall surface (10) for supporting the component (2), and the stamp (20) has a stamp length (23) and a stamp surface (21), wherein the inner diameter (12) of the recess (5) of the mold (1) becomes smaller from the first mold opening (6) in the direction of the second mold opening (8) or an external diameter (22) of the stamp (20) becomes greater over the stamp length (23), and wherein a compaction element (17) is arranged on the wall surface (10) of the mold (1) or on the stamp surface (21). The compaction element (17) is configured to have a thread-like progression.

Abstract: The invention relates to a gear arrangement (1), comprising a main gear (2) and a gear (4) that can be rotated relative to the main gear in the circumferential direction (3), wherein the main gear (2) or the rotatable gear (4) has at least one supporting web (12) that protrudes in the axial direction (7) and the rotatable gear (4) or the main gear (2) has at least one opening (16), in which the supporting web (12) is at least partially accommodated, wherein the opening (16) has a dimension in the circumferential direction (3) that is greater than the dimension of the supporting web (12) in the same direction, and comprising at least one spring element (10), which acts in the circumferential direction (3) of the main gear (2) and which is arranged on a lateral surface (13) of the supporting web (12) or on a lateral surface (17) of the opening (16) and at least partially within the opening (16). The spring element (10) is connected to the supporting web (12) or the lateral surface (17) of the opening (16).

Abstract: The invention relates to an assembly (1) having at least two metallic components (2, 3) which are subject to sliding stress and each have a sliding surface and in operation slide against one another, wherein at least one of the components (2, 3) consists of a metallic sintered material having an iron-based matrix containing iron together with carbon and up to 10% by weight of at least one non-ferrous metal at least in the region of the sliding stress, where the carbon content is at least 1% by weight and not more than 10% by weight and at least part of the carbon is present in unbound particulate form in the matrix.

Abstract: The invention describes a belt pulley (1) for a wet belt application, with a pulley body (2) comprising toothing (5) incorporating teeth (6) on an end face (4) for a toothed belt, and a tooth gap (7) with a tooth gap base (12) is disposed between every two teeth (6), and optionally with at least one flange (3), which is disposed—in the axial direction—on the side of the pulley body (2) and extends beyond the toothing (5) in the radial direction. Grooves (9) are provided in the region of the tooth gap base (12) and/or on an inner surface (8) of the flange (3) facing the toothing (5) for feeding away a lubricant.

Abstract: In a motor vehicle, a combustion engine and electric machine are coupled with each other by a belt drive having a pulley and by a planetary gear train. The pulley is connected with a rotatable element, e.g. the sun gear of the planetary gear train. A second rotatable element, e.g. the ring gear of the planetary gear train, is connected with a brake disk. The brake disk extends radially farther outwardly than the pulley. In this way, the brake, for example two brake elements with a brake caliper support and brake shoes, can be arranged outside the pulley, resulting in small dimensions of the planetary gear train with the pulley.

Abstract: A sintered gearwheel is described having teeth (1) which, in the flank and root region (2, 3), comprise a compacted surface layer (7, 8, 9) which is continuous in the transition portion (4) between the flank and root region (2, 3) and has a residual porosity of less than 10%. In order to increase the load-bearing capacity it is proposed that the compacted surface layer (9) is formed with a lower thickness in the transitional portion (4) between the flank and root region (2, 3) than in the adjacent flank and root regions (2, 3).

Abstract: The invention relates to a rolling tool (2) for producing crowned teeth on a gear (5) using a transverse rolling process, in particular for compressing the teeth of the gear (5) at least in some areas, comprising a tool body (6) which has tool teeth (7) projecting radially outward for meshing with the teeth of the gear (5) to be rolled, wherein at least some areas of the tool teeth (7) are concave in the axial direction in the area of the tooth flanks.

Abstract: The invention describes a method of producing a compression mold profile (21) of a compression mold for a non-circular sintered chain wheel or cog belt wheel (1), whereby a compression mold profile (21) is set up by scaling a desired profile (19) of the chain wheel or cog belt wheel (1) with a scaling factor. The compression mold profile (21) is set up by applying a corrective shift applied in addition to scaling the desired profile (19).

Abstract: The invention relates to a spur gear wheel with a gear body (4, 5) made from a sintered material, which has a circumference around which teeth (6, 7) are distributed projecting in the radial direction, and which is delimited by two end faces (8, 9, 10, 11) in the axial direction. At least one shaped element (12) in the form of a recess (13) and/or an elevation (14) and/or a compacted area is provided on at least one end face (8, 9, 10, 11) in the region of the teeth (6, 7) and/or in the radial direction underneath the teeth (6, 7).

Abstract: The invention relates to a tool (3) for compacting a sintered component or a powder for the sintered component, with a clamping element (10) and a compacting element (11) which can be radially adjusted in terms of its dimensions, with a contact surface for the sintered component or powder, which has a surface complementing the surface of the sintered component to be produced, and the clamping element (10) has an oblique first surface (12) and the compacting element (11) has an oblique second surface (13) complementing it, and the first and the second oblique surface (12, 13) co-operate in order to prise apart and open or make smaller the compacting element (11), and the clamping element (10) and/or the compacting element (11) can be displaced in the axial direction, and a support element (9) is provided if necessary.

Abstract: A method is described for producing a gear wheel from a powdered metal blank (1) compressed and sintered having a machining allowance in the gearing area, the powdered metal blank (1) being compacted by the machining allowance with a plastic deformation by rolling of a compression tool (7) forming a counter gearing engaging in the gearing of the powdered metal blank (1). To provide advantageous compaction conditions, it is suggested that the powdered metal blank (1) be compacted simultaneously around the entire circumference by rolling of profile rolls (8) forming the compression tool (7) axially to the powdered metal blank (1).

Abstract: A sintered coupling ring (1) is described, comprising a ring of coupling teeth (2) which comprise relieved flanks (4) extending from wedge-shaped end faces (3) and, on the side opposite the wedge-shaped end faces (3), a stop (5) that protrudes radially beyond the tooth tip (6). In order to provide advantageous constructional conditions it is proposed that the stops (5) have a greater density than the remaining tooth tip (6).

Abstract: A method for backing the inside teeth (2) of a sliding sleeve (3) produced by way of powder metallurgy for a manual transmission is described where the backings (1) of the teeth (4) forming the front-side pitches (9) are formed with the aid of a rolling tool (5) by back rolling accompanied by plastic deformation of material from the backing region. In order to prevent burr formation, it is proposed that the front-side tooth sections (8) delimited by the backings (1) are simultaneously calibrated whilst forming and/or calibrating the relevant pitches (9) with the aid of the rolling tool (5) for forming the backings (1).

Abstract: A metallic structural part is described which is joined from at least two components (1, 2), of which one component (1) comprises a hub-like nose (3) for receiving the other annular component (2) without play, which is placed on the nose (3) so as to be stopped there and is secured against axial withdrawal by a latching ring which engages in a circular latching recess (8) of one of the two components (1, 2). In order to provide simple constructional conditions it is proposed that the latching ring engaging in the latching recess (8) of the one component (1) consists of a radially projecting ring segment (7) of the other component (2) and that the radial projecting portion (r) of the ring segment (7) corresponds at most to the magnitude of the maximum elastic deformation of the ring segment (7) in the radial direction.

Abstract: The invention relates to a power assist element (11) for arrangement in a synchronizer hub (2) of a transmission synchronization device (1), comprising a base body (22), which has a height (23), a longitudinal extension (24) and a lateral extension (25), and which in the direction of the longitudinal extension (24) comprises two opposite, distal end sections (26), wherein in at least one end section (26) a functional surface (27) is formed, which in the installed state cooperates with the synchronizer hub (2), wherein on the base body (22) between the two distal end sections (26) a central elevation (15) is formed for engagement in a sliding sleeve groove (17) on a bottom (16) of a sliding sleeve (5), wherein the central elevation (15) comprises at least one additional functional surface (34), which can be brought into active connection with the sliding sleeve (5).