In order to solve some key problems associated with the rapid manufacturingof metallic functional part, a new technique using vacuum solid-state pressure diffusion weldingprocess to join the metallic slice sheets is p...In order to solve some key problems associated with the rapid manufacturingof metallic functional part, a new technique using vacuum solid-state pressure diffusion weldingprocess to join the metallic slice sheets is put forward. The following results can be drawn fromthe experiments: only 1 percent shrinkage happened in the stack direction and it came from theregular system error. The atoms diffuse between joint interfaces clearly and new grains formedmeanwhile. The average shear strength of welding zone is more than 100 MPa and micro hardness ofwelding zone is almost the same as that of matrix. It is shown from above results that the vacuumsolid-state pressure diffusion welding process is an available technique to join metal slice sheetsfor the rapid manufacturing of metallic functional parts.展开更多
Meshes in the sheet of Laminated Object Manufacturing (LOM) are now designedwith the same size, and the length of mesh lines may be as several times as the outline length.The method of variablesize meshes is advanced ...Meshes in the sheet of Laminated Object Manufacturing (LOM) are now designedwith the same size, and the length of mesh lines may be as several times as the outline length.The method of variablesize meshes is advanced in this paper. Meshes in a sheet are designed ac-cording to the difficulty of removing the waste in or out of the outlines. The CAD model may bedivided into several segments in Z direction with different mesh sizes. The length of mesh lineswould be largely decreased and the manufacturing efficiency would be improved.展开更多
基金This project is supported by National Natural Science Foundation of China(No.59875088) Municipality Science Foundation of Chongqing (No.2000-6062).
文摘In order to solve some key problems associated with the rapid manufacturingof metallic functional part, a new technique using vacuum solid-state pressure diffusion weldingprocess to join the metallic slice sheets is put forward. The following results can be drawn fromthe experiments: only 1 percent shrinkage happened in the stack direction and it came from theregular system error. The atoms diffuse between joint interfaces clearly and new grains formedmeanwhile. The average shear strength of welding zone is more than 100 MPa and micro hardness ofwelding zone is almost the same as that of matrix. It is shown from above results that the vacuumsolid-state pressure diffusion welding process is an available technique to join metal slice sheetsfor the rapid manufacturing of metallic functional parts.
文摘Meshes in the sheet of Laminated Object Manufacturing (LOM) are now designedwith the same size, and the length of mesh lines may be as several times as the outline length.The method of variablesize meshes is advanced in this paper. Meshes in a sheet are designed ac-cording to the difficulty of removing the waste in or out of the outlines. The CAD model may bedivided into several segments in Z direction with different mesh sizes. The length of mesh lineswould be largely decreased and the manufacturing efficiency would be improved.
