Ntn Corporation

Naoki Nakagawa

Tatsuro Sugiyama

Masazumi Kobayashi

Shintaro Suzuki

Tsuneaki Hiraoka

Yasuhiko Sakakibara

Masaharu Hori

Mitsuo Sasabe

Yasuyuki Watanabe

Hiromi Nagai

Daisuke Kagawa

Takuya Fujita

Takeshi Maeda

Shigeki Matsushita

Nobuyuki Mori

Tokio Ueda

Kiyohiro Suzuki

Renji Natsume

Kenichi Nakano

Takeshi Shimasawa

Hiromi Hayashi

Masahiro Tosaji

Takashi Imanaka

Souichi Yagi

An inspection device inspects a joint-type outer joint member of a constant velocity universal joint that includes a cup section having a bottomed cylindrical shape and track grooves in an inner periphery thereof for torque transmitting elements, and a shaft section extending from a bottom of the cup section. The inspection device inspects the outer joint member, which is obtained through melt-welding on a cup member forming the cup section and a shaft member forming the shaft section. The inspection device includes a surface inspection unit to inspect for a defect which appears on a surface of the outer joint member due to welding, an internal inspection unit to inspect for an internal defect of a welded portion, and a recording unit to record an inspection result of the inspection. The inspection device is configured to efficiently perform in-line total inspection for the melt-welded joint-type outer joint member.

Device for inspecting junction-type outer joint member of constant velocity universal joint

A method of manufacturing an outer joint member of a constant velocity universal joint includes forming cup and shaft members of medium carbon steel, preparing, as the cup member, a cup member having cylindrical and bottom portions integrally formed by forging, and a joining end surface formed on an outer surface of the bottom portion, and preparing, as the shaft member, a shaft member having a joining end surface to be joined to the bottom portion of the cup member. The method also includes bringing the joining end surfaces of the cup and shaft members into abutment against each other, and welding the cup and shaft members from an outer side of the cup member to an abutment portion between the cup and shaft members in a radial direction of the cup members.

Method for manufacturing outer joint member for constant-velocity universal joint and outer joint member

For butt-welding, which includes bringing joining end surfaces of a cup member and a shaft member into abutment against each other and radiating a high energy intensity beam from a radially outer side, the shaft member has a recess on a radially inner side of the joining end surface to obtain a welded portion having a closed hollow cavity on a radially inner side after butt-welding. The joining end surface (protruding surface) of the cup member protrudes toward a radially inner side with respect to an inner diameter of the joining end surface of the shaft member. With this, a welded portion of an outer joint member of a constant velocity universal joint, which is manufactured by joining the cup member and the shaft member, can be improved in strength and quality.

Method for butt welding, butt welded joint, and outside joint member for constant velocity universal joint

In an outer joint member of a constant velocity universal joint, a cup member and a shaft member are made of medium to high carbon steel and welded together. The cup member has a bottomed cylindrical shape that is opened at one end, and includes a cylindrical portion, a bottom portion, and a short shaft section of a solid shaft shape protruding from the bottom portion and having a joining end surface. The shaft member has a solid shaft shape and a joining end surface. The joining end surfaces of the cup and shaft members are brought into abutment against each other, and a high energy intensity beam is radiated from an outer side in a radial direction to form a welded portion. A structure of a molten metal at the welded portion is in a mixed phase of ferrite and granular cementite.

Constant velocity universal joint outer joint member and manufacturing method for same

A method of manufacturing an outer joint member of a constant velocity universal joint includes forming cup and shaft members of medium carbon steel, the cup member being manufactured by preparing a cup member having cylindrical and bottom portions being integrally formed, and a fitting hole formed in a thick portion of the bottom portion, the shaft member being manufactured by preparing a shaft member having a fitting outer surface formed at an end portion of the shaft member to be joined to the bottom portion of the cup member, and fitting the fitting hole of the cup member to the fitting outer surface of the shaft member. The method also includes welding the cup and shaft members from an inner side of the cup member to a fitted portion between the cup and shaft members.

Manufacturing method for constant velocity universal joint outer joint member and outer joint member

Provided is a method of manufacturing an outer joint member of a constant velocity universal joint, which is constructed by welding a cup member and a shaft member, the method including: forming the cup member and the shaft member of medium carbon steel; preparing; preparing; bringing the joining end surface of the cup member and the joining end surface of the shaft member into abutment against each other; welding the cup member and the shaft member; and performing, after the welding, ultrasonic flaw detection-inspection from any one of a surface side of the cup member and a surface side of the shaft member, which has the another one of the joining end surface of the cup member and the joining end surface of the shaft member.

Method for manufacturing outer joint member for constant velocity universal joint and outer joint member

A welding method for an outer joint member of a constant velocity universal joint includes constructing a cup section having track grooves, which engage with torque transmitting elements, formed along an inner periphery thereof and a shaft section that is formed on a bottom portion of the cup section by two or more separate members, joining a cup member forming the cup section and a shaft member forming the shaft section, and melt-welding end portions of the cup member and the shaft member. The cup member and the shaft member are shaped so that a sealed hollow cavity portion is formed when the end portions of the cup member and the shaft member are brought into abutment against each other, the melt-welding of the end portions being performed when the sealed hollow cavity portion is under atmospheric pressure or lower.

Welding method for outer joint member of constant velocity universal joint, and outer joint member

A manufacturing method for an outer joint member of a constant velocity universal joint includes forming a cup member and a shaft member, forming a joining hole in a thickness of a bottom portion to prepare the cup member as a finished component, and forming a joining outer surface on an end portion of the shaft member to be joined onto the bottom portion of the cup member to prepare the shaft member as a finished component. The method also includes fitting the joining hole of the cup member and the joining outer surface of the shaft member as the finished components to each other, and welding a fitting portion between the joining hole and the joining outer surface through irradiation of a beam from an inner side of the cup member, a diameter of the fitting portion being an equal dimension for each joint size.

Manufacturing method for outer joint member of constant velocity universal joint and outer joint member

A method for fixing a boot includes mounting a tubular anchoring areas, defined in opposite ends of a resinous boot, on an outer periphery of a counterpart member, and applying a clamping force to boot bands mounted around respective outer peripheries of the tubular anchoring areas to thereby fix the tubular anchoring areas to the outer periphery of the counterpart member. Coils are disposed around respective outer peripheries of the boot bands to generate an induction current in the boot bands. In this way, a reactive force of the magnetic field is generated between the coils and the boot bands to plastically deform the boot bands and reduce their diameters, whereby the tubular anchoring areas are fixed to the outer periphery of the counterpart member.

Method of fixing boot

A double-row self-aligning roller bearing includes left and right rows of rollers, arranged between an inner race and an outer race. A raceway surface of the outer race represents a spherical shape and the rollers have an outer peripheral surface following the shape of the raceway surface of the outer race. The rollers of the left and right roller rows have respective lengths different from each other. Also, the left and right roller rows have respective contact angles different from each other.

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Shizuoka, Japan

Naoki Nakagawa