A bottom face processing method of a pillar-shaped honeycomb structure including steps of: preparing a pillar-shaped honeycomb structure including a plurality of first cells which extend in parallel with each other from a first bottom face to a second bottom face, and each of which is opened in the first bottom face and has a protruding plugged portion in the second bottom face, and a plurality of second cells each of which is adjacent to at least one of the first cells with a partition wall interposed therebetween, which extend in parallel with each other from the first bottom face to the second bottom face, and each of which has a protruding plugged portion in the first bottom face, and is opened in the second bottom face; and removing the protruding portion from the plugged portion of each of the first cells and the second cells of the pillar-shaped honeycomb structure.

A method for producing an exhaust-gas aftertreatment device inserts a monolith in a housing, assembled from a circumferentially enclosed jacket and two end funnels. The monolith is axially inserted into the jacket with a circumferentially enclosing support mat. The funnels are connected to the jacket via an axial connecting section shaped complementary to the cross-section of the jacket, such that each connecting section and an axial end section of the support mat axially overlap. The jacket, including the connecting sections of the funnels are reduced from a starting cross-section to an end cross-section. This produces a predetermined radial preload in the support mat in a support area extending from the one connecting section to the other connecting section to retain the monolith in the jacket.

A honeycomb structure 1 includes a honeycomb structure portion comprising: an outer peripheral wall 20; a partition wall 21 arranged on an inner side of the outer peripheral wall 20, the partition wall 21 defining a plurality of cells 21a each extending from one end face to other end face to form a flow path, wherein the honeycomb structure 1 further includes: a plurality of slits 3 extending radially inward from an outer peripheral surface 1a of the honeycomb structure 1 and extending in an extending direction of the cells 21a; and a filling material 4 filled in the slits 3, and wherein, when a difference between a width Y of the filling material 4 and a width X of each of the slits 3, represented by the following equation (1), is determined for each of the slits 3, a difference between a maximum value A of the difference and a minimum value B of the difference, represented by the following equation (2), is 0.4 mm or less:

(Y−X)  (1)

(A−B)  (2),

in which equation (1), X represents the width of each of the slits 3 on the outer peripheral surface 1a of the honeycomb structure, and Y represents the width of the filling material 4 when the filling material 4 is viewed from the outside in the radial direction of the honeycomb structure 1.

A method for producing a honeycomb body for a catalytic converter for treating exhaust gases, the honeycomb body having a plurality of flow ducts, through which gas flows from an inlet end to an outlet end. The honeycomb body is formed from a plurality of metal layers lying one on top of the other. The honeycomb body is produced by forming corrugated sections in a metal strip, wherein the corrugated sections follow one another directly or are spaced apart by smooth sections, creating a pre-bend of the metal strip in the end region of each section, folding the individual sections of the metal strip onto one another to create a layer stack, wherein the individual sections are alternately folded onto one another in opposite directions, inserting the layer stack in a housing, and joining the layer stack to the housing in contact regions between the layer stack and the housing.

A method for production of an exhaust-gas routing device that has a housing, an elongated substrate, and a compensating element, includes the following steps. At least one parameter of the substrate and/or of the compensating element is determined A target parameter, which describes a variable linked to a target geometry of the housing, is determined based on the measured parameter of the substrate and/or of the compensating element. The substrate and the compensating element are arranged in the housing, and the housing is deformed with an overpressure factor which is determined on the basis of at least one previous deformation of a previously manufactured device. The housing is measured after the deformation, and the thus-established values are compared with the target parameter. An overpressure factor for the deformation of a subsequently manufactured device is adapted if a deviation from the target parameter is detected upon measuring which lies above a defined threshold value.

A compression jaw assembly unit for a compressing device for compressing tubular metal parts includes a compression jaw carrier (17) and a compression jaw (16), provided at the compression jaw carrier (17), with a compressing surface (18) that is oriented essentially facing away from the compression jaw carrier (17) and is curved transversely to a compression jaw longitudinal direction (L.sub.B) in a compression jaw transverse direction (Q.sub.B). The compression jaw (16) includes a fixed compression jaw segment (22), which is fixed to the compression jaw carrier (17) and provides a compressing surface segment (24), and at least one movable compression jaw segment (26, 28) providing a compressing surface segment (30, 32). The at least one movable compressing surface segment (26, 28) can be moved in a direction of movement (B) in relation to the fixed compressing surface segment (22) against the prestressing action of a prestressing device (42).

A machine comprises a tool for pre-positioning of a body of an exhaust component and a fitting tool having a passage converging from a large opening to a small opening. An actuator device is configured to push the body along a main axis of the machine toward a cover of the exhaust component through the converging passage.

A method for producing a honeycomb body for a catalytic converter for treating exhaust gases, the honeycomb body having a plurality of flow ducts, through which gas flows from an inlet end to an outlet end. The honeycomb body is formed from a plurality of metal layers lying one on top of the other. The honeycomb body is produced by forming corrugated sections in a metal strip, wherein the corrugated sections follow one another directly or are spaced apart by smooth sections, creating a pre-bend of the metal strip in the end region of each section, folding the individual sections of the metal strip onto one another to create a layer stack, wherein the individual sections are alternately folded onto one another in opposite directions, inserting the layer stack in a housing, and joining the layer stack to the housing in contact regions between the layer stack and the housing.

A compression jaw assembly unit for a compressing device for compressing tubular metal parts includes a compression jaw carrier (17) and a compression jaw (16), provided at the compression jaw carrier (17), with a compressing surface (18) that is oriented essentially facing away from the compression jaw carrier (17) and is curved transversely to a compression jaw longitudinal direction (L.sub.B) in a compression jaw transverse direction (Q.sub.B). The compression jaw (16) includes a fixed compression jaw segment (22), which is fixed to the compression jaw carrier (17) and provides a compressing surface segment (24), and at least one movable compression jaw segment (26, 28) providing a compressing surface segment (30, 32). The at least one movable compressing surface segment (26, 28) can be moved in a direction of movement (B) in relation to the fixed compressing surface segment (22) against the prestressing action of a prestressing device (42).

A method for production of an exhaust-gas routing device that has a housing, an elongated substrate, and a compensating element, includes the following steps. At least one parameter of the substrate and/or of the compensating element is determined A target parameter, which describes a variable linked to a target geometry of the housing, is determined based on the measured parameter of the substrate and/or of the compensating element. The substrate and the compensating element are arranged in the housing, and the housing is deformed with an overpressure factor which is determined on the basis of at least one previous deformation of a previously manufactured device. The housing is measured after the deformation, and the thus-established values are compared with the target parameter. An overpressure factor for the deformation of a subsequently manufactured device is adapted if a deviation from the target parameter is detected upon measuring which lies above a defined threshold value.