As the main structural component of the machine tool, the bed bears various static and dynamic loads during the working process; And connected to the foundation of the factory building through anchor devices. The stress situation is complex, requiring high requirements for rigidity and dynamic characteristics. Therefore, it is necessary to analyze the structure and dynamic characteristics of the bed components during the design process.

During the operation of the machine tool, the force generated by the self weight of the bed and workbench, as well as the mass of the workpiece being cut, can be considered as a static load due to its constant direction and size. The purpose of statics analysis is to consider the deformation of the index bed under specific load constraints. The deformation directly reflects the static stiffness of the bed.

The factor that affects the static stiffness of the bed is the layout of the internal rib cavity of the bed casting, including two aspects: the size and form of the rib cavity.

Based on existing design experience, under the premise of the same size of the reinforcement cavity, the static stiffness of the bed with honeycomb reinforcement and beige reinforcement layout is better than that with grid reinforcement. However, under the same size, the quality of the bed with the arrangement of beige ribs and honeycomb ribs is also significantly higher than that of the bed with square ribs, resulting in a significant increase in casting costs. Therefore, simply using the size of the rib cavity as a limiting condition to measure the rigidity of different forms of rib cavity layouts is not objective.