A method of assembling and retaining a noise attenuation device (30) within an air inlet (16) of a compressor cover (12) includes inserting the noise attenuation device (30) into the air inlet (16) and applying a rolling compressive force to the air inlet (16) using a forming tool (40). As a result, the air inlet terminal end (17) is deformed radially inward so as to form a radially-inwardly protruding lip (17b) about the air inlet terminal end (17). The radially-inwardly protruding lip (17b) is configured to retain the noise attenuation device (30) within the air inlet (16). The forming tool (40) used to form the radially-inwardly protruding lip (17b) is also described.

This invention relates to a joint housing (10) of a ball joint (12), comprising a sheet-metal part (14) for accommodating a ball head (16), which is substantially rotationally symmetrical with respect to a joint axis (A) and includes a circumferential wall portion (18), wherein the circumferential wall portion (18) includes a housing opening (26) at an axial end (24), through which a joint pin (28) can extend, wherein the sheet-metal part (14) is formed with two layers at this axial end (24) of the circumferential wall portion (18). Furthermore, the invention also relates to a method for mounting such joint housing (10) on a carrier element (34).

This invention relates to a joint housing (10) of a ball joint (12), comprising a sheet-metal part (14) for accommodating a ball head (16), which is substantially rotationally symmetrical with respect to a joint axis (A) and includes a circumferential wall portion (18), wherein the circumferential wall portion (18) includes a housing opening (26) at an axial end (24), through which a joint pin (28) can extend, wherein the sheet-metal part (14) is formed with two layers at this axial end (24) of the circumferential wall portion (18).

Furthermore, the invention also relates to a method for mounting such joint housing (10) on a carrier element (34).