F - Mech Eng,Light,Heat,Weapons – 01 – L
Patent
F - Mech Eng,Light,Heat,Weapons
01
L
123/196
F01L 1/14 (2006.01)
Patent
CA 1092920
Improved Valve Moving Push Rod for Internal Combustion Engines and Method of Making the Same Abstract of the Disclosure: This invention is made with a view to increasing the fusing strength of an end piece in a valve moving push rod for internal combustion engines. The fusing part of the push rod according to the present invention consists of an .alpha.-martensite structure and a primary truestite structure in a cotransition boundary range of a segmental section formed into the hardened layer of the end piece from the fused boundary surface of the end piece with a tube end part and is provided with a tough mixed layer arcuated from the inside and part of the above mentioned fused boundary surface to the outside end part thereof. This mixed layer is obtained by reducing by a heat feeding means a quick temperature drop caused by the fusing part simulta- neously with cutting off the fusing current in welding by electric resistance the end piece on the fixed side surface to the peripheral edge of the end port of a tube material. Such crack as is recognized in the fusing part of a con- ventional product is not recognized in a product obtained by reducing the quick cooling by this method. -1-
311662
Kirby Eades Gale Baker
Usui Kokusai Sangyo Kabushiki Kaisha
LandOfFree
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