Exedy Corporation

Hideki Tanishiki

Hajime Yoshida

Shinji Fujimoto

Yukiyoshi Takada

Takeshi Kawamoto

Kenji Mieda

Naoki Mizobuchi

An automatic ultrasonic examination device includes an ultrasonic test instrument, a robot arm, and a control device. The ultrasonic test instrument includes an ultrasonic probe to send ultrasonic and detecting reflected waves while being in contact with the spot-welded portion, and an ultrasonic test instrument main device connected to the ultrasonic probe to convert the reflected wave detection signals received from the ultrasonic probe into test information. The control device includes a real center location computing unit to identify a real center location of the spot-welded portion with reference to pieces of test information obtained around a preset tentative center location of the spot-welded portion, and a determination unit to check quality of the spot-welded portion with reference to test information obtained at the real center location.

Automatic ultrasonic examination device, automatic ultrasonic examination method and production method using the examination method

A strong lightweight front cover that prevents distortion of a sliding contact surface when the front cover and impeller shell are welded together is provided. The front cover has a radial flange part and an axial flange part that extends from an outside edge of radial flange part . The radial flange part has a sliding contact surface on an axially facing surface thereof for sliding against a friction facing . The axial flange part has a connection part that connects to the radial flange part and a welding part that is connected by welding to a pump impeller. The various portions of the front cover have differing rigidities and thicknesses.

Fluid-type torque transmission device with lockup clutch

An electric discharge device,is provided for removing material from a workpiece,to form a through hole,therein. The electric discharge device,is designed to maintain the pressure of processing liquid after the hole,extends through the workpiece,to thereby stabilize the electric discharge during the hole forming process. Basically, the electric discharge device,includes a movable discharging electrode,, an arc voltage discharging device,, a processing liquid supply mechanism,and an indexing mechanism,. The arc voltage charging device,supplies current at a predetermined voltage between the discharging electrode,and a workpiece,. An electrode reciprocating mechanism,moves the discharging electrode,towards and away from the workpiece. The processing liquid supply mechanism,is fluidly coupled to an internal bore,of the discharging electrode,for supplying processing liquid inside the discharging electrode,. The processing liquid flows out of an end of the discharging electrode,and engages the workpiece,. The indexing mechanism,has a jig,with a plurality of concave portions or recesses,that are positioned to correspond to the discharging electrode,. These concave portions or recesses,maintain the pressure of the processing liquid after a through hole,is formed on the workpiece,. In the preferred embodiment, the workpiece,is a gear with a plurality of holes being formed between adjacent teeth portions. The gear has an annular space,that receives the jig

Electric arc discharge device and method

The invention relates to a boss formed on a front cover. The boss is formed by deforming a portion of a front cover material, at a central portion thereof, such that the boss is formed unitarily with the front cover. The boss is further deformed to form a central indentation on an end surface thereof. Further, the cylindrical sides of the boss are machined to form an alignment surface.

Front cover of a torque convertor having a boss formed on the front

An impeller shell 40a of a torque converter includes a main portion 41, a connection portion 42 and a stepped portion 43. The main portion 41 has a curved inner peripheral surface 41a carrying impeller blades, and is opposed to a turbine 5. The connection portion 42 has a cylindrical form larger in diameter than an outer periphery of the inner peripheral surface 41a, and is fixed to a front cover 3. The stepped portion 43 couples an end of the main portion 41 near an engine to an end of the connection portion 42 near a transmission. A corner portion formed of the inner peripheral surface 41a and a surface 43a near the engine has a radius set to 4 mm or less by preliminary forming by a press and subsequent finish forming by a press.

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Osaka, Japan

Hideki Tanishiki