Disc rotor, production apparatus therefor, roller, and disc rotor production method

A disc rotor production apparatus for producing a disc rotor by connecting together a hat member and a sliding plate member, the hat member having a cylindrical portion one end portion of which is closed and a flange portion provided at an opening-side end portion of the cylindrical portion, the sliding plate member having an insertion hole into which the cylindrical portion of the hat member is inserted,

• the disc rotor production apparatus comprising:
• a temporary assembly holding portion which is configured to hold a temporary assembly of the hat member and the sliding plate member in which the cylindrical portion of the hat member is inserted into the insertion hole of the sliding plate member and an inner peripheral edge portion of the sliding plate member is in contact with the flange portion;
• and
• a plastic working portion which is in contact with an outer peripheral portion of the cylindrical portion in the temporary assembly held by the temporary assembly holding portion and, in an opposite side of the flange portion across the inner peripheral edge portion of the sliding plate member in the axial direction of the cylindrical portion, is configured to plastically deform the outer peripheral portion of the cylindrical portion by compressing the outer peripheral portion toward the flange portion, thereby forming a second portion which is configured to pinch the inner peripheral edge portion in cooperation with the flange portion serving as a first portion.

A roller which is applied to a disc rotor production apparatus, wherein

• the disc rotor production apparatus is configured to produce a disc rotor from a temporary assembly of a hat member and a sliding plate member, the hat member having a cylindrical portion one end portion of which is closed and a flange portion provided at an opening-side end portion of the cylindrical portion, the sliding plate member having an insertion hole into which the cylindrical portion of the hat member is inserted, the cylindrical portion of the hat member being inserted into the insertion hole of the sliding plate member and an inner peripheral edge portion of the sliding plate member is in contact with the flange portion,
• the roller is configured to be in contact with an outer peripheral portion of the cylindrical portion in the temporary assembly, and
• the roller comprises:
• an annular plastic working portion which, in an opposite side of the flange portion across the inner peripheral edge portion of the sliding plate member in the axial direction of the cylindrical portion, is configured to plastically deform the outer peripheral portion of the cylindrical portion by compressing the outer peripheral portion toward the flange portion, thereby forming a second portion which is configured to pinch the inner peripheral edge portion in cooperation with the flange portion serving as a first portion;
• and
• a forming space which is provided in the plastic working portion, which is open toward a center axis of the cylindrical portion and toward the flange portion, and into which a portion of the cylindrical portion plastically deformed by the plastic working portion is introduced to form the second portion.

A disc rotor production method of producing a disc rotor by connecting together a hat member and a sliding plate member, the hat member including a cylindrical portion one end portion of which is closed and a flange portion provided at an opening-side end portion of the cylindrical portion, the sliding plate member having an insertion hole into which the cylindrical portion of the hat member is inserted,

• the disc rotor production method comprising:
• forming a temporary assembly by inserting the cylindrical portion of the hat member into the insertion hole of the sliding plate member until an inner peripheral edge portion of the sliding plate member is in contact with the flange portion;
• and
• plastically deforming an outer peripheral portion of the cylindrical portion in the temporary assembly by compressing the outer peripheral portion toward the flange portion, thereby forming a second portion which pinches the inner peripheral edge portion in cooperation with the flange portion serving as a first portion;
• at the inner peripheral edge portion of the sliding plate member, a concave portion is formed on a plate surface which faces the second portion;
• and
• forming a convex portion which protrudes into the concave portion together with the second portion by plastically deforming the outer peripheral portion of the cylindrical portion by compressing the outer peripheral portion toward the flange portion.