摘要:
A multistage gear-rolling apparatus of the present invention comprises a roller squeezing apparatus (31,41) including a roughing roller die (32,42) and a finishing roller die (33,43) disposed coaxially and connected in series in an axial direction of said roughing roller die (32,42). The roughing roller die is used for carrying out a hot rough-rolling step. The finishing roller die (32,42) is used for a warm finish-rolling step. Thus, immediately after the hot rough-rolling step, the warm finish-rolling step can be carried out without a reset of workpiece (7).
摘要:
A multistage gear-rolling apparatus of the present invention comprises a roller squeezing apparatus (31,41) including a roughing roller die (32,42) and a finishing roller die (33,43) disposed coaxially and connected in series in an axial direction of said roughing roller die (32,42). The roughing roller die is used for carrying out a hot rough-rolling step. The finishing roller die (32,42) is used for a warm finish-rolling step. Thus, immediately after the hot rough-rolling step, the warm finish-rolling step can be carried out without a reset of workpiece (7).
摘要:
A cylinder liner for insert casting used in a cylinder block is provided. The cylinder liner includes an outer circumferential surface having a plurality of projections. Each projection has a constricted shape. A film of a metal material is formed on the outer circumferential surface and the surfaces of the projections. As a result, the cylinder liner ensures sufficient bond strength with the casting material of a cylinder block, and sufficient thermal conductivity with the cylinder block.
摘要:
A cylinder liner for insert casting used in a cylinder block is provided. The cylinder liner includes an outer circumferential surface having a plurality of projections. Each projection has a constricted shape. A film of a metal material is formed on the outer circumferential surface and the surfaces of the projections. As a result, the cylinder liner ensures sufficient bond strength with the casting material of a cylinder block, and sufficient thermal conductivity with the cylinder block.
摘要:
A cylinder block contains a cylinder liner having an outer circumferential surface on which a film is formed. The film functions to form gaps between the cylinder block and the cylinder liner. Alternatively, the film functions to reduce adhesion of the cylinder liner to the cylinder block. The cylinder liner suppresses excessive decreases in the temperature of a cylinder.
摘要:
A cylinder block contains a cylinder liner having an outer circumferential surface on which a film is formed. The film functions to form gaps between the cylinder block and the cylinder liner. Alternatively, the film functions to reduce adhesion of the cylinder liner to the cylinder block. The cylinder liner suppresses excessive decreases in the temperature of a cylinder.