Process for producing a shaft clamping member

Details Process for producing a shaft clamping member Process for producing a shaft clamping member

1994-08-18

1996-10-22

Vo, Peter

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

29425, 29DIG31, 74579E, B23P 1510

Patent

active

055664490

ABSTRACT:
A connecting rod as a shaft clamping member includes a rod member and cap, each of which has mating faces at circumferentially opposite ends of a semi-circular recess and which are fastened to each other by bolts by matching the opposed mating faces to each other to define a crank pin hole by the two semi-circular recesses. The rod member and the cap are forgings formed from an aluminum alloy and simultaneously produced by forging powder preforms of the rod member and cap in a cavity having the desired shape of the connecting rod. After forging, the opposed mating faces have an infinite number of recesses and projections which are formed from the flow of the material during the forging and which are in a matched and fitted relation to each other. Thus, any misalignment between and in a direction parallel to the mating faces can be prevented to avoid the generation of a situation that only the rod member receives a stress. This achieves a prolongation in the life of the connecting rod of the aluminum alloy. The composition of the most desirable aluminum alloy includes, by weight, 7% .ltoreq.Fe<15%, 1% <Si<4% and between 1% and 3% of a metal selected from Ti, Zr, Mn, Ni, Cr, V, Mg and Mm (Misch metal) with the balance Al. The preferred forging temperature is between about 550.degree. C. and 650.degree. C.

REFERENCES:
patent: 2265839 (1941-12-01), Hufferd et al.
patent: 2287251 (1942-06-01), Jones
patent: 4198879 (1980-04-01), Hornak et al.
patent: 4688466 (1987-08-01), Burkdoll et al.
patent: 4693139 (1987-09-01), Mukai et al.
patent: 4923674 (1990-05-01), Weber
patent: 4992117 (1991-02-01), Okubo et al.
patent: 5109605 (1992-05-01), Hoag et al.
Search Report.
English language translation of Abstract of JP 61-186433.
English language translation of Abstract of JP 2-247348.

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