Abstract: In a vibration welding method and a vibration welding apparatus, a base plate and a vibrating plate which can be vibrated relatively to each other clamp an instrument panel, a storage box, and a duct as layers therebetween, which are joined to each other under pressure with vibration. A protective member of urethane is disposed on a workpiece rest for placing the base plate thereon. The storage box is made of a material having a relatively low melting point, and the duct is made of a material having a relatively high melting point. The thickness of the protective member is different depending on the location where the protective member supports the resin base, and the storage box or the duct.

Abstract: There is provided a method for preparing an analytical model for analyzing a shape of a molded part. The method includes: (a) measuring the shape of the molded part three-dimensionally to obtain shape data; (b) dividing the shape data into two surfaces which define a thickness of the molded part; (c) calculating a deviation between the divided two surfaces, as thickness data; (d) relating the thickness data with the shape data; (e) preparing a shape model of the molded part from CAD data related to the molded part; (f) associating the shape model with the shape data; and (g) imparting, to shape model, the thickness data related with the shape data in accordance with the association in step (f), thereby preparing the analytical model.

Abstract: In a vibration welding method and a vibration welding apparatus, a base plate and a vibrating plate which can be vibrated relatively to each other clamp an instrument panel, a storage box, and a duct as layers therebetween, which are joined to each other under pressure with vibration. A protective member of urethane is disposed on a workpiece rest for placing the base plate thereon. The storage box is made of a material having a relatively low melting point, and the duct is made of a material having a relatively high melting point. The thickness of the protective member is different depending on the location where the protective member supports the resin base, and the storage box or the duct.