Research On The Square Ram Deformation Processing And Compensation

The structure of the square ram is widely used in NC boring and milling machine. It is one of major parts of completing processing and it is the part that directly receives loads. The static and dynamic properties of square ram influence the precision and processability of the whole machine tool and products'quality directly. Besides, the deformation of square ram is also a difficult problem that manufacturers of NC machine with movable type square ram must face to. So the research and analysis of the structure of square ram is very important realistic function and economic function to improve the NC machine's precision and original structure and structural optimization design. The TK6920 NC Boring and Milling machine square ram is research object. The square ram is researched with general finite analysis software ANSYS. The main work is as follows:The NC boring and milling machine's square ram and milling spindle and boring spindle solid models have been built through 3 dimension software. It analyses and calculates the loads and boundary constraint condition of square ram based on the actual working environment and adopts the milling forces calculation formula of the paper.The paper analyses the main causes of square ram's deformation. The finite element models of square ram has been proposed based on the finite element software. The static and dynamic analysis of square ram have been computed. The results of static analysis show displacement of different extended length of square ram with ram-self weight or loads. The mathematical models for deformation and extended length and axial gravity variation of extended length's ram and deformation are established. It analyses relationship about deformation and cutter diameter and deformation and rotate speed when square ram extends fixed length. The modal analysis has been performed and shows the square ram natural frequency and mode shape. The results of transient analysis show dynamic properties of square ram with transient forces and relationship about deformation and time with transient loads.According to results of the static and dynamic analysis, the static and dynamic properties of square ram meet the requirements of machining. Its intensity safety factor is high and it's with optimal space for bloated structure. With combination of finite element analysis and optimization design, reducing the square ram's weight as the optimum design and static parameters as constraint conditions, its structure is designed with type-selection optimization design method.It introduces general compensation methods of square ram. They can reduce deformation and meet the precision of NC machine. It analyses the deflection ram. compensation of square ram and establishes a curve of pull rod and extended length's...