As a high-efficiency precision machining, high-precision grinders have relatively high requirements for the processing of parts, and the batch size of workpieces is to be produced in as many quantities as possible. After obtaining the required precision and range, the control accuracy and control accuracy of the lathe must be selected. Reliability is performed based on its stability. So, what are the procedures for establishing a finite element model of a high-precision grinder?
1.Simplification of grinding machine geometric model
The geometric model of the high-speed grinder has been simplified as necessary. Which high-precision grinder is better to buy? It mainly includes: without changing the basic features of the model, ignoring small features such as chamfers, small holes, and thread relief grooves; simplifying structures such as small bosses designed for installation process requirements; using the The bevel angle that allows the grinding fluid to flow back, such as the bevel on the workbench, is simplified into a plane; the grinding wheel spindle subsystem is simplified, ignoring the specific forms of structures such as bearings and sleeves, and replacing them with equivalent spring damping units.
2.Mesh division of finite element model
Choose a high-precision grinder with good service. For large and complex components such as the bed, use the method of automatically dividing the mesh by controlling the mesh size. The type of mesh is to select high-order tetrahedral elements for the spindle, worktable and grinding wheel. For the frame base, an important part that has a great impact on the performance of the grinder, an eight-node hexahedral unit is created using a manual meshing method, which not only helps ensure accuracy but also improves modeling efficiency.
3.Simulation of the joint in the complete machine model
The joints of high-speed grinders are mainly divided into two categories: bolted joints and guide rail sliding joints. The contact stiffness and contact damping of the joint have a great influence on the dynamic characteristics of the whole machine. Therefore, the prerequisite for accurately analyzing the dynamic characteristics of the whole machine is to accurately simulate the joint of the machine tool.
When performing its functions, according to its required conditions, if it operates for a long time without any equipment problems, it is the reliability of the high-precision grinder. Even if it breaks down, it can be put into use in a short time and repaired according to its components. Operation, so when choosing, according to the nature of the grinder, choose one with a refined structure and reasonable manufacturing for use.
