Manufacturing method of long shaft type wheel shaft having side tooth profile

A manufacturing method and tooth shape technology, applied in the manufacturing field of wheel shafts, can solve problems such as increased processing costs, required costs, and low durability, and achieve the effects of improving production efficiency, reducing processing costs, and reducing material loss

Inactive Publication Date: 2018-01-05
HANHO IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, the method described above has the disadvantage of increasing the processing cost because heat treatment and processing steps are required before the cold forging step, and a trimming step and an internal stress relief heat treatment step are added after the cold forging step.
[0012] Therefore, in order to solve this probl

Method used

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  • Manufacturing method of long shaft type wheel shaft having side tooth profile
  • Manufacturing method of long shaft type wheel shaft having side tooth profile
  • Manufacturing method of long shaft type wheel shaft having side tooth profile

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[0036] Refer below Figure 1 to Figure 4 A detailed description of the embodiments of the present invention is as follows.

[0037] Before the description, it should be pointed out that the hot forging and radial forging methods according to the present invention specifically suggest the best design values ​​and technical composition for manufacturing the axles of the continuously variable transmission added to the automobile, but it is not the application The object must be limited to the axles for continuously variable transmissions. That is, even if it is another kind of axle, if it has the same shape and structure as the axle for continuously variable transmission, it means that all are included.

[0038] Such as figure 2 As shown, the long-shaft type axle with side tooth profile according to the present invention is composed of a long-shaft shaft portion 120 that is thinner and longer than the shaft portion of the driving wheel and a wheel portion 110 formed outside the shaf...

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Abstract

The present invention relates to a manufacturing method of a long shaft type wheel shaft having a side tooth profile, the method comprising: a material cutting step of cutting a bar-shaped bar into apredetermined length to form a material; a hot forging step including: forming a wheel portion having a predetermined thickness by pressing a portion of the bar with a medium and forming a molding protruding portion protruding upward in the wheel portion and molding a pre-molded article having a side tooth profile, wherein the side tooth profile has gear teeth and tooth grooves repeatedly formed on an outer circumferential surface of the molding protruding portion; a radius forging step of arranging four dies in the circumferential direction on the remaining part of the material, wherein the arranged four dies pressurize the material simultaneously and continuously for molding in four directions of up, down, left and right simultaneously and elongation molding is performed according to a specified length and a predetermined diameter to form a shaft portion; and a cold straightening step of precisely forging the side tooth profile of the wheel portion formed by the hot forging step intoa required size.

Description

technical field [0001] The present invention relates to a method for manufacturing a wheel shaft, and more specifically, to a method for manufacturing a long-shaft wheel shaft with a side tooth profile that can reduce manufacturing costs and improve productivity by hot forging. Background technique [0002] In general, the driving force required to drive a vehicle varies greatly depending on the running environment, and in response to this, the vehicle is equipped with a transmission that converts torque between the engine and drive wheels. [0003] As such a transmission, it is roughly classified into a manual transmission in which the driver directly determines the number of gears according to the number of revolutions of the engine, the speed of the vehicle, and the degree of vehicle noise; an automatic transmission in which the gear is automatically changed according to the driving conditions of the vehicle; A CVT (ContinuouslyVariableTransmission: hereinafter referred t...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21K1/06B21K1/30
CPCB21J5/02B21J5/12B21J9/022B21K1/12
Inventor 姜东翰文浩根金桢九张诚珉
Owner HANHO IND CO LTD
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