Process of manufacturing wrenches
OwnerChen Chih Lininventor
Life of this patent
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Abstract
A processes of manufacturing wrenches is provided with preparing a cylinder of raw material; cutting the cylinder of raw material into cylindrical first half-finished products; increasing volumes of two one ends of each first half-finished product 10-18% by compressing to form a second half-finished product having two spheres at two ends respectively; pressing each sphere to form top and bottom flats on the ends of the second half-finished product respectively; sintering the second half-finished product; placing the second half-finished product in a die; forging the second half-finished product to form a third half-finished product; and punching the third half-finished product to form a finished wrench having an open end and a box end.
Claims1
A processes of manufacturing wrenches, the process comprising the steps of:
- preparing a cylinder of raw material;
- cutting the cylinder of raw material into a plurality of cylindrical first half-finished products;
- increasing volumes of two one ends of each first half-finished product 10-18% by compressing to form a second half-finished product including two spheres at two ends respectively, each sphere having top and bottom flats;
- sintering the second half-finished product;
- placing the second half-finished product in a die;
- forging the second half-finished product to form a third half-finished product;
- and
- punching the third half-finished product to form a finished wrench having an open end and a box end.
Dependencies are inferred from the claim text.