TUBE EXPANDING TOOL Russian patent published in 2005 - IPC

FIELD: plastic working of metals, possibly tube expanding.

SUBSTANCE: tool includes clamp mechanism having clamp cylinder and spacing rod arranged in it. Tool includes housing in which compression spring is arranged in such a way that its one end rests upon housing and other end rests upon end of clamp cylinder; force working member mounted inside compression spring and made of shape memory alloy. One end of working member is secured to housing; its other end is secured to spacing rod. Spring and working member are made with possibility of creation in common system of forces in which direction of summed vector acting upon spacing rod depends upon temperature of working member. Increase of working member temperature till value exceeding that of reverse martensite conversion causes generation of efforts transmitted to spacing rod due to shortened length of working member.

EFFECT: lowered cost price of labor, enhanced efficiency of tool.

1 dwg