Method of manufacturing rotating body of torque converter and rotating body of torque converter manufactured by the manufacturing method

Abstract

A method of manufacturing a rotating body of a torque converter capable of reducing cost for manufacturing the rotating body of the torque converter. The rotating body comprises the turbine shell of the torque converter, a plurality of turbine blades fixed to the inner surface of the turbine shell, and the driven plate of a lockup device fixed to the rear face of the turbine shell. The manufacturing method for the rotating body comprises a first step, a second step, and a third step. In the first step, the driven plate is fixed to the turbine shell. In the second step, the turbine shell and the plurality of turbine blades are heated and the plurality of turbine blades are fixedly brazed to the turbine shell. In the third step, for hardening, the rotating body is rapidly cooled after heat treatment in the second step.

Description

technical field [0001] The present invention relates to a method for manufacturing a rotating body of a torque converter, and more particularly, to a method for manufacturing a rotating body composed of a volute, a plurality of blades, and a driven plate. [0002] In addition, the present invention relates to a rotating body of a torque converter manufactured by this method. Background technique [0003] The torque converter is a device that has three types of impellers (impeller, turbine, and stator) inside the working oil chamber, and transmits torque from the input side rotating body to the output side rotating body using hydraulic oil. The turbine is connected to the output side member and has a volute and a plurality of turbine blades. The volute is an annular member having a shape swollen toward the front cover side on the engine side. A plurality of turbine blades are radially arranged and fixed on the inner surface of the volute. [0004] As a conventional torque ...

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Problems solved by technology

[0008] In the above-mentioned conventional method of manufacturing a rotating body, the number of steps is large, and the energy consumption is also large, so the manufacturing cost increases.

[0009] In addition, in the above-mentioned manufacturing method, unlike brazing, induction hardening is performed locally, so the strength of the driven plate varies depending on the location.

[0010] In addition, in the above-mentioned manufacturing method, when the volute and the turbine blades are made of high-tensile materials, their properties are lost due to heat treatment during brazing, and durability, strength, etc. may decrease.

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