发明名称 |
DEFORMED ELEMENT PIPE FOR HYDRAULIC BULGING, HYDRAULIC BULGING DEVICE USING THE ELEMENT PIPE, HYDRAULIC BULGING METHOD USING THE ELEMENT PIPE, AND HYDRAULIC-BULGED PRODUCT |
摘要 |
A profile element pipe for hydraulic bulging of the present invention has a peripheral length with an outer diameter gradually increasing or decreasing from one axial side toward the other thereof and has a parallel part formed on at least one end thereof. According to a bulging device and a bulging method using this profile element pipe, for example, even when a profile steel pipe having a cross sectional shape varying in the axial direction as in a tapered pipe is hydraulically bulged, a bulging in which an internal pressure loading and an shaft pressing are combined with each other can be performed to provide a larger expansion ratio than a conventional case and a joining and socket connection thereof to the other part can also be easily performed. <IMAGE> |
申请公布号 |
KR100634917(B1) |
申请公布日期 |
2006.10.18 |
申请号 |
KR20057008028 |
申请日期 |
2005.05.06 |
申请人 |
|
发明人 |
|
分类号 |
B21D26/02;B21D26/033;B21D26/045 |
主分类号 |
B21D26/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|