Suzuki Motor Corporation

Nippon Steel Sumitomo Metal Corporation

Takatoshi Sasahara

Takashi Miyagi

Yasuharu Tanaka

Misao Ogawa

Shigeru Uchiyama

A method of producing an L-shaped product () which includes an L-shaped flat top wall (), an inside wall () extending and connected along an inside edge () of the top wall, and an outside wall () extending and connected along an outside edge () of the top wall, each of the inside and outside walls being terminated by flange () substantially parallel to the top wall, is disclosed. The method comprises the steps of: providing sheet metal material; providing a drawing die assembly; and stamping the sheet metal material by the drawing die assembly to produce an intermediate product. The method further comprises the steps of: providing a bending die assembly; and stamping the intermediate product by the bending die assembly to produce an L-shaped product completed.

Method of producing L-shaped product

In order to realize improving dimensional accuracy of a plastic workpiece and realize reducing a production cost and shortening time duration of manufacture, a computer comprises an initial die assembly shape calculating function to calculate a die assembly shape for the plastic workpiece according to a predetermined designed shape of said plastic workpiece; a workpiece shape calculating function to calculate the shape of the plastic workpiece to be manufactured with the initial die assembly shape considering a manufacturing condition of the plastic workpiece; a shape comparing function to compare the calculated shape of the plastic workpiece and the designed shape of the plastic workpiece; a workpiece-redesigning function to calculate a new designed shape of the plastic workpiece according to a result of the comparison; and a die assembly reshaping function to calculate a new die assembly shape according to the new designed shape of the plastic workpiece.

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Shizuoka, Japan

Takatoshi Sasahara