A system for manufacturing a drive shaft assembly comprises a welding apparatus configured to weld a tube to an end fitting to form the drive shaft assembly having an annular weld. A transport apparatus is configured to transport the drive shaft assembly away from the welding apparatus. A knurling apparatus receives the drive shaft assembly from the transport apparatus. The knurling apparatus is configured to knurl the weld of the drive shaft assembly. The knurling apparatus includes a pair of knurling plates having textured surfaces in facing relationship. One of the knurling plates is configured to move relative to the other of the knurling plates to roll the drive shaft assembly between the textured surfaces, thereby knurling the weld to improve an appearance and texture of the outer surface of the drive shaft assembly.

A system for manufacturing a drive shaft assembly comprises a welding apparatus configured to weld a tube to an end fitting to form the drive shaft assembly having an annular weld. A transport apparatus is configured to transport the drive shaft assembly away from the welding apparatus. A knurling apparatus receives the drive shaft assembly from the transport apparatus. The knurling apparatus is configured to knurl the weld of the drive shaft assembly. The knurling apparatus includes a pair of knurling plates having textured surfaces in facing relationship. One of the knurling plates is configured to move relative to the other of the knurling plates to roll the drive shaft assembly between the textured surfaces, thereby knurling the weld to improve an appearance and texture of the outer surface of the drive shaft assembly.

A brake disk with a friction ring or to a friction ring, which comprises a PMMC (particle metal matrix composite), at least in the region of its friction surface. The friction surface of the friction ring is provided with mechanically applied microgrooves, which extend in a radial direction with respect to a circumferential direction of rotation of the friction ring, non-tangentially angled thereto.

A method of imprinting a belt sheave without removal of an associated belt includes placing a knurling wheel of a tool against a circumferentially extending section of a sheave not in contact with the belt. The sheave is then rotated to induce rotation of the knurling wheel. A jack screw of the tool is actuated to bias the knurling wheel against the sheave for production of imprints upon the sheave.

A method of imprinting a belt sheave without removal of an associated belt includes placing a knurling wheel of a tool against a circumferentially extending section of a sheave not in contact with the belt. The sheave is then rotated to induce rotation of the knurling wheel. A jack screw of the tool is actuated to bias the knurling wheel against the sheave for production of imprints upon the sheave.

A method includes: bending a sheet about a mandrel such that the sheet is tubular, wherein the sheet includes a first longitudinal end portion and a second longitudinal end portion; engaging the first longitudinal end portion with the second longitudinal end portion; and passing the sheet between a first knurling wheel and a second knurling wheel such that the first knurling wheel applies a first knurling pattern to the sheet over the first longitudinal end portion and the second longitudinal end portion and the second knurling wheel applies a second knurling pattern to the sheet over the first longitudinal end portion and the second longitudinal end portion.

A method includes: bending a sheet about a mandrel such that the sheet is tubular, wherein the sheet includes a first longitudinal end portion and a second longitudinal end portion; engaging the first longitudinal end portion with the second longitudinal end portion; and passing the sheet between a first knurling wheel and a second knurling wheel such that the first knurling wheel applies a first knurling pattern to the sheet over the first longitudinal end portion and the second longitudinal end portion and the second knurling wheel applies a second knurling pattern to the sheet over the first longitudinal end portion and the second longitudinal end portion.

A brake disk with a friction ring or to a friction ring, which comprises a PMMC (particle metal matrix composite), at least in the region of its friction surface. The friction surface of the friction ring is provided with mechanically applied microgrooves, which extend in a radial direction with respect to a circumferential direction of rotation of the friction ring, non-tangentially angled thereto.

A method of imprinting a belt sheave without removal of an associated belt includes placing a first knurling wheel of a tool against a circumferentially extending section of a sheave not in contact with the belt. The sheave is then rotated to produce the imprints.

A method of imprinting a belt sheave without removal of an associated belt includes placing a first knurling wheel of a tool against a circumferentially extending section of a sheave not in contact with the belt. The sheave is then rotated to produce the imprints.