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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

AI Technical Summary

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 problem, it is also possible to manufacture the wheel and the shaft separately and then weld them together to manufacture one axle, but in the case of adding a welding process, this also requires expense and becomes a factor of production cost increase. At the welded part, The flow of metal is cut off, resulting in a problem of low durability

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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Embodiment Construction

[0036] Refer below Figure 1 to Figure 4 , the embodiments of the present invention will be described in detail 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 value and technical composition for manufacturing the wheel shaft of the continuously variable transmission attached to the automobile, but it is not intended to apply Objects must be limited to axles for continuously variable transmissions. That is, even if it is another type of axle, if it has the same shape and structure as the axle for the continuously variable transmission, it means that all of them are included.

[0038] Such as figure 2 As shown, according to the present invention, the long-shaft wheel axle with side teeth 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 on...

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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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