摘要:
A turbocharger (1) includes: a turbine wheel (2) that is driven by exhaust gas from an engine and supported rotatably by a rotary shaft (3); and a turbine housing (6) that forms an exhaust gas passage that leads the exhaust gas to the turbine wheel (2), wherein the turbine housing (6) includes a housing main body (7) constituted by a plate-form member and a reinforcement member (20) that forms the exhaust gas passage together with the housing main bod (7)y and reinforces the housing main body, the reinforcement member includes a pair of annular portions (21,22) having a substantially annular shape and provided about an axial center of the rotary shaft (3) at an interval in an axial direction of the rotary shaft, and a connecting portion (24) that connects the pair of annular portions (21,22), and the pair of annular portions and the connecting portion are molded integrally by implementing deformation processing on the plate -form member.
摘要:
A surface roughening apparatus (1) includes a first mold (10) and a second mold (20). The first mold (10) has a plurality of protrusions (12) each formed in an angular shape. The first mold 10 presses a metallic material (50) to form recesses (52) corresponding to the respective shapes of the protrusions (12) in a surface (50a) of the metallic material (50). The second mold (20) has a plurality of protrusions (22) each formed in an angular shape. After the first mold (10) presses the metallic material (50), the second mold (20) presses the metallic material (50), thereby deforming each recess (52) into an undercut shape. A height of each protrusion (12) is greater than that of each protrusion (22). A tip angle of each protrusion (12) is smaller than that of each protrusion (22).
摘要:
A surface roughening apparatus (1) includes a first mold (10) and a second mold (20). The first mold (10) has a plurality of protrusions (12) each formed in an angular shape. The first mold 10 presses a metallic material (50) to form recesses (52) corresponding to the respective shapes of the protrusions (12) in a surface (50a) of the metallic material (50). The second mold (20) has a plurality of protrusions (22) each formed in an angular shape. After the first mold (10) presses the metallic material (50), the second mold (20) presses the metallic material (50), thereby deforming each recess (52) into an undercut shape. A height of each protrusion (12) is greater than that of each protrusion (22). A tip angle of each protrusion (12) is smaller than that of each protrusion (22).
摘要:
An assembly conductor manufacturing method according to one aspect of the invention includes aligning, around a center strand (30), a plurality of peripheral strands (10), each having at least two side surfaces, one of which opposes an adjacent peripheral strand on one side in a circumferential direction and the other of which opposes an adjacent peripheral strand on the other side in the circumferential direction, so as to form an assembly conductor in which the center strand (30) and the peripheral strands (10) are aligned; twisting the plurality of peripheral strands (10) around the center strand (30) that forms the assembly conductor; and plastic forming the twisted assembly conductor into a substantially rectangular sectional shape. The peripheral strand (10) provided with the two side surfaces has a sectional shape in which a width between the side surfaces becomes narrower toward the center strand (30).
摘要:
A cooling fin (31) includes fin parts (1) integrally extending from a base part (2). Each fin part (1) is partially formed at a slant so that a proximal end portion is straight and a distal end portion is wavy (corrugated). Each fin part (1) is partially slanted to make each fin part (1) wavier as coming closer to the distal end portion from the proximal end portion. In a manufacturing process of the cooling fin (31), firstly, a straight cooling fin is produced by extrusion molding (an extruding step). Subsequently, the distal end portion of each fin is partially bent in a direction intersecting an extruding direction into a wave shape (a bending step).