Title:
METHOD FOR MANUFACTURING UNIVERSAL JOINT USING PIPE
Document Type and Number:
WIPO Patent Application WO/2018/070758
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for manufacturing a universal joint using a pipe, wherein a shaft joint having a yoke formed integrally therewith and a pipe joint are manufactured by cutting a pipe into a material having a predetermined length, forming the material, pressing the material, and then processing the material, thereby providing advantageous effects of manufacturing cost reduction, productivity improvement, and product weight decrease while guaranteeing durability. Particularly, a pipe joint is manufactured by a material preparing step of cutting a pipe into a predetermined length, thereby preparing a material; a shaft forming step of forming the outer portion of a shaft forming portion of the material, excluding a head forming portion, by a forming machine such that, by reducing the outer diameter thereof, a shaft is formed; an incising step of forming a splitting groove on the head forming portion, which has not been reduced, in the axial direction such that the same is bifurcated; a yoke forming step of pressing the incised head forming portion such that a pair of yokes are formed on the head so as to face each other; a pin hole forming step of forming a pin hole in the yoke; a material preparing step of manufacturing a shaft joint through a spline shaft forming step of forming a spline shaft on the outer surface of the reduced hollow shaft and cutting the pipe into a predetermined length, thereby preparing a material; a tube forming step of forming the outer portion of a tube forming portion of the material, excluding a head forming portion, by the forming machine such that the outer diameter thereof is reduced; an incising step of forming a splitting groove on the head forming portion, which has not been reduced, in the axial direction such that the same is bifurcated; a yoke forming step of pressing the incised head forming portion such that a pair of yokes are formed on the head so as to face each other; a pin hole forming step of forming a pin hole in the yoke; and a spline boss forming step of forming a spline boss on the inner surface of the reduced hollow tube.
Inventors:
LEE BYEONG HWA (KR)
Application Number:
PCT/KR2017/011131
Publication Date:
April 19, 2018
Filing Date:
October 11, 2017
Export Citation:
Assignee:
LEE YANG HWA (KR)
International Classes:
B21K1/76; B21J5/02; B21J5/10; B21J5/12
Domestic Patent References:
| WO2016006803A1 | 2016-01-14 |
Foreign References:
| KR20110045311A | 2011-05-04 | |||
| KR100767105B1 | 2007-10-12 | |||
| KR20150139164A | 2015-12-11 | |||
| KR100655940B1 | 2006-12-11 | |||
| KR20060116099A | 2006-11-14 | |||
| KR101322363B1 | 2013-10-28 | |||
| KR101632702B1 | 2016-06-22 |
Other References:
See also references of EP 3527301A4
Attorney, Agent or Firm:
DAE YEON PATENT & LAW FIRM (KR)
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