Improving the efficiency of bulldozer rippers and excavators by CAD, CAE engineering methods Available to Purchase

Single-toothed rippers have been widely used as attachments for bulldozers and excavators, for work with heavy, rocky and frozen soils in the forestry and road construction industries. In mechanical engineering, as in other industries, it is important to modernize equipment in order to improve its capabilities, reduce metal consumption. Computer-aided design systems and programs for modeling physical processes are widely used for the modernization and design of equipment. In the process of designing or upgrading the ripper, it is important to ensure the effectiveness of the structure and the preservation of strength characteristics. In the course of the study, in order to determine the effective loads on the tooth of a single-tooth ripper, the loosening resistance was calculated depending on the type of soil. In the computer-aided design program "Compass 3D", a three-dimensional ripper model was modeled. In the Altair Inspire SAE system, strength characteristics were calculated, the physical process of applying a load to a single-tooth ripper was simulated. The load was the calculated value of the soil resistance to loosening, for the IV group of soil, which was - 33750 N. In the software package, the materials of the ripper were accepted for calculation, these are steel - 09G2S and St3. When calculating the coefficient of safety margin St3 was - 2, and 09G2S - 4. To reduce the weight of the structure without losing the strength indicators of the ripper, topological optimization of the single-tooth ripper was carried out. Topological optimization techniques can reduce the weight of the structure by 13%, and reduce the amount of deformation from 7 mm to 4 mm.