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Небесная энциклопедия

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Применить Всего найдено 2. Отображено 2.
22-04-2010 дата публикации

METHOD FOR MANUFACTURING SUPER STRONG STEEL BODY FOR MANUFACTURE OF PRODUCTS WITH COMPLICATED SHAPE

Номер: KR2010044530A1
Автор: IM, Hee Joong, NAM, Seung Man, MOON, Man Been, NA, Sang Muk, NAMKOONG, Sung
Принадлежит:

The present invention relates to a method for manufacturing a super strong steel body, more specifically, to the method for manufacturing a super strong steel body suitable for the processing of products with complicated shapes and deep casting depths. The present invention comprises: a sheet preparation step for blanking a steel sheet with curing ability in a certain shape and cutting the steel sheet; a cold forming step for cold pressing the steel sheet and forming the steel sheet with 50~80% the thickness of the height of the end product; a trimming step for precisely cutting the cold formed product along the outline of the finished goods; and a hot forming and cooling step for simultaneously hot press forming the trimmed goods with 20~50% the thickness of the height of the end product and cooling the trimmed goods from the heated state after heating the trimmed goods over 700℃ for austenitization.

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Номер записи: 1
24-06-2010 дата публикации

MULTI-LAYER TUBE USING HIGH-PRESSURE TUBE-HYDROFORMING AND MANUFACTURING METHOD THEREOF

Номер: KR2010071259A1
Автор: HUR, Ju Haeng, JEON, Dong Hyun, KIM, Yun Gyu, KIM, Hyo Sub, NA, Sang Muk
Принадлежит:

The present invention comprises: a step for preparing a mold including an outer tube, an inner tube having a diameter of 95~98% of the diameter of the outer tube, and a molding groove having a diameter of 100.20~100.30% of the diameter of the outer tube; a step for inserting the inner tube into the outer tube and settling the tubes in the molding groove; a first molding step for expanding the inner tube to bring the inner tube into contact with the outer tube by injecting fluid into the inner tube to the first molding pressure; a second molding step for elastically expanding the outer tube to bring the outer tube into contact with the inner groove by increasing the hydraulic pressure of the inner tube to the second molding pressure; and an elasticity restoring step for bonding the outer tube and inner tube by restoring the elasticity of the outer tube through the removal of the fluid injected into the inner tube. The first molding pressure of the first molding step ranges within10~20% of ...

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Номер записи: 2