Magnesium die-cast brake master cylinder

Details Magnesium die-cast brake master cylinder Magnesium die-cast brake master cylinder

1977-10-05

1978-10-31

Mehr, Milton S.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

295273, 295275, 164113, 164100, 164101, 164102, 164103, 164111, 164112, B22D 11126

Patent

active

041225961

ABSTRACT:
A method of fabricating a lighter composite master brake cylinder is disclosed along with the resulting product. A seamless steel tube of critical thickness, closed at one end, and treated by acid etching on its exterior, is oriented vertically within a mold cavity. The tube is pretreated to contain critically dimensioned punched and coined openings for brake fluid filling and fluid delivery. Openings in the cast body are defined by pin cores aligned with the tube openings and are dimensioned to separate the edge of the tube openings from the cast opening. The tube is supported by a plug extending snuggly into the interior of said tube, said plug being joined at one end to the die walls; the cores are also supported by suitable attachment to the die walls. The tube is preheated to a predetermined temperature and molten magnesium is cast thereabout producing a compression fit about the tube as a result of solidification shrinkage; a superior metallurgical bond is created at the tube and casting interface due to surface asperities and temperature control during solidification.

REFERENCES:
patent: 3098270 (1963-07-01), Bauer

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