The Mechanism of the Occurrence of Laps and Incomplete Fills in Impression Dies

スポンサーリンク

概要

• 論文の詳細を見る

• Metal flow toward the triangular cavities remaining in web portion is studied to estimate forging load and the occurrence of laps during a filling stage of die forging. In the experiment plasticine-blanks with V-shaped grooves were compressed with upper and lower dies which had a flat-bottomed recess. The mechanism of the formation of laps and incomplete fills in the impression dies is analyzed by utilizing the slip-field solutions as upper-bound techniques. It has been proved by the analysis that five typical modes of deformation appear depending on the ratio of the volume of material flowing toward the cavities to the volume of material flowing into gutters. And it has been found that the shape and dimensions of the cavities and the amount of confinement of the material by the dies have a great influence on the depth of laps caused and the forging pressure.

• 一般社団法人日本機械学会の論文

著者

• Saiki Hiroyuki

  Faculty Of Engineering Kumamoto Univercity

• Saiki Hiroyuki

  Faculty Of Engineering Kumamoto University

• HIJIOKA Katsuaki

  Nissan Motor Co. Ltd.

関連論文

• Research on the Material Flow in Sunken Forging Dies : 1st Report, Geometry of Deformation in the H-Shaped Section
• The Mechanism of the Occurrence of Laps and Incomplete Fills in Impression Dies
• Study on the Frictional Boundary Conditions at the Edge of a Tool-material Interface in Massive Forming : Prediction of the Deformation Characteristics by Slip-line Field Method and the Friction Testing Apparatus for Plane Strain Forging

スポンサーリンク