A non-deforming structure of a wrench contains: a handle and at least one driving head arranged on at least one end of the handle. The handle includes an elongated body having four corners, a first length, a handle width, a handle thickness, and four elongated recesses. The handle width is 1.4 time to 2.6 time more than the handle thickness. Each elongated recess has a second length, a largest width, and a largest depth. Each of the largest width and the largest depth of each elongated recess shrinks from an intermediate portion thereof to two ends of each of the largest width and the largest depth until connects with each corner. The second length takes up at least of the first length, the largest width takes up 2/9 to 4/9 of the handle width, and the largest depth takes up 2/9 to 4/9 of the handle thickness.

A non-deforming structure of a wrench contains: a handle and at least one driving head arranged on at least one end of the handle. The handle includes an elongated body having four corners, a first length, a handle width, a handle thickness, and four elongated recesses. The handle width is 1.4 time to 2.6 time more than the handle thickness. Each elongated recess has a second length, a largest width, and a largest depth. Each of the largest width and the largest depth of each elongated recess shrinks from an intermediate portion thereof to two ends of each of the largest width and the largest depth until connects with each corner. The second length takes up at least of the first length, the largest width takes up 2/9 to 4/9 of the handle width, and the largest depth takes up 2/9 to 4/9 of the handle thickness.

A method for forming a spanner includes following steps: preparing a cylindrical metal blank, heating the metal blank to become softened, shaping the metal blank by pressing and pushing the metal blank forward on a shaping die with a pushing unit to form two head sections and a holding section connected between the head sections, and stamping the metal blank when the metal blank still has residual heat to flatten the holding section and shape each head section into a spanner-shaped part. Therefore, a spanner product is made. The method simplifies the processing procedures, decreases residual materials, achieves a quick shaping operation, reduces processing costs, and increases the forming efficiency.

A method for forming a spanner includes following steps: preparing a cylindrical metal blank, heating the metal blank to become softened, shaping the metal blank by pressing and pushing the metal blank forward on a shaping die with a pushing unit to form two head sections and a holding section connected between the head sections, and stamping the metal blank when the metal blank still has residual heat to flatten the holding section and shape each head section into a spanner-shaped part. Therefore, a spanner product is made. The method simplifies the processing procedures, decreases residual materials, achieves a quick shaping operation, reduces processing costs, and increases the forming efficiency.

A method for forming a wrench end includes the steps of preparing a flat blank, initially press-forging at least one end of the blank to form a head with a wrench-shaped part and a hole on the blank, bending the head to form a curved section and a stretched section which are bent at different angles, and shaping the head by holding the curved section and the stretched section with a gripping apparatus and then pressing the hole of the head with a punch in order to subject the two sections to a squeezing force whereby the sections can have a denser interior structure and facilitate a final shaping of the head. The method facilitates a quick shaping of the wrench end and increases the efficiency of forming a wrench product.

A method for forming a wrench end includes the steps of preparing a flat blank, initially press-forging at least one end of the blank to form a head with a wrench-shaped part and a hole on the blank, bending the head to form a curved section and a stretched section which are bent at different angles, and shaping the head by holding the curved section and the stretched section with a gripping apparatus and then pressing the hole of the head with a punch in order to subject the two sections to a squeezing force whereby the sections can have a denser interior structure and facilitate a final shaping of the head. The method facilitates a quick shaping of the wrench end and increases the efficiency of forming a wrench product.

A method for forming a wrench end includes the steps of preparing a flat blank, initially press-forging at least one end of the blank to form a head with a wrench-shaped part and a hole on the blank, bending the head to form a curved section and a stretched section which are bent at different angles, and shaping the head by holding the curved section and the stretched section with a gripping apparatus and then pressing the hole of the head with a punch in order to subject the two sections to a squeezing force whereby the sections can have a denser interior structure and facilitate a final shaping of the head. The method facilitates a quick shaping of the wrench end and increases the efficiency of forming a wrench product.

A method for forming a wrench end includes the steps of preparing a flat blank, initially press-forging at least one end of the blank to form a head with a wrench-shaped part and a hole on the blank, bending the head to form a curved section and a stretched section which are bent at different angles, and shaping the head by holding the curved section and the stretched section with a gripping apparatus and then pressing the hole of the head with a punch in order to subject the two sections to a squeezing force whereby the sections can have a denser interior structure and facilitate a final shaping of the head. The method facilitates a quick shaping of the wrench end and increases the efficiency of forming a wrench product.

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.

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.