US 5,878,323 A · Process for producing split type mechanical part

Abstract

A plurality of blanks divided at a division end face 5 or a blank-bonded product comprising a plurality of blanks sintered and bonded together are or is compressed in the same mold, so that they are plastically deformed until the division end faces 5 are cohered. Thereafter, a load is applied to the plastically worked product in a direction of breaking of the division end faces 5 to break the division end faces 5 and divide the plastically worked product into a plurality of members. In this manner, a split type mechanical part having irregularities meshed with each other on mating faces and easily positionable relative to each other can be produced with a good dimentional accuracy.

Claims14

Dependent claims

A process for producing a split type mechanical part, comprising the steps of:

preparing a plurality of blanks made of an ingot material or a sintered material, divided at intended dividing faces;
pressing the blanks with the intended dividing faces opposed to each other in a mold to plastically deform the blanks until the intended dividing faces are cohered to each other, thereby providing a plastically worked product;
and
applying a load to the plastically worked product in a direction to break said product at the intended divided faces, thereby breaking and dividing the plastically worked product into a plurality of members,
wherein at least the intended dividing face of each of said blanks is subjected to a shot blasting treatment or a brushing and then, each of said blanks is pressed and plastically deformed until said plurality of members are cohered to each other or until said plurality of members are re-united.

2 more elements

A process for producing a split type mechanical part, comprising the steps of:

preparing a plurality of blanks made of a sintered material divided at intended dividing faces which are located so as to traverse a bore of a resultant product;
sintering and bonding the blanks with the intended dividing faces abutting against each other to provide a sintered product;
placing said sintered product into a plastically working mold while expanding said bore;
breaking said sintered product at sintered and bonded faces of the product, or producing a crack in said sintered product extending along the sintered and bonded faces and then, pressing broken pieces of the product or the product in a cracked state;
plastically deforming said broken pieces of the product or the cracked product until the pieces are cohered to each other or until the cracked product is re-united at the intended dividing faces, thereby providing a plastically worked product;
and
applying a load to the plastically worked product in a direction to break the plastically worked product at the intended dividing faces, thereby breaking and dividing the plastically worked product into a plurality of members.

4 more elements

Dependencies are inferred from the claim text.

Process for producing split type mechanical part

Life of this patent

Process for producing split type mechanical part

Life of this patent

Abstract

Claims14