Optimization And Analysis On Static, Dynamic Performance Of Key Parts Of BX0 Style Boring And Milling Machine

The on-line repair of flange sealing groove of the large pressure vessel is difficulty enormous in chemical industry. When off-line repair, the investment in manpower and material resource is too high, so the time of repairing and stopping production is long, the influence is so big on the industrial production. According to this issue, the flange sealing-face boring and milling machine is specially designed as an on-line repairing numerical control machine.In this paper, the BX0 style boring and milling machine is taken as the research object, the strength, stiffness, vibration and structure optimization problems of the machine key parts are argued by the finite element method, the main contents are as follows:(1)Make structural analysis of the machine key parts (clasp, turn arm, cutter), under the premise of ensuring reflect the mechanical properties of the actual structure, simplifying the structure of the 3D model, the parametric entity models are establishment by Pro/E, and imported ANSYS through special interface to establish the finite element models of key parts. The complex model directly modeling inconvenience in ANSYS is better solved by this method, and achieves a truly CAD/CAE seamless connection.(2) The vertical and horizontal common conditions of clasp in the practical work are analyzed and calculated, the stress, deformation cloud and stress, deformation and in the biggest danger position under different conditions are gained through static performance analysis, from which we can get the preliminary judgment that the part can fully support the machine working normally.(3)Make modal analysis and frequency response analysis of turn arm. The inherent frequency and vibration model of turn arm under constraint conditions are determined in modal analysis; its dynamic response displacement is gained in frequency response analysis. With which to evaluate the dynamic characteristics of turn arm, and provide the reference in its structure improvement. On this basis, its quality is reduced and effective rigidity is improved by the topological optimization design of turn arm.(4) Based on the modeling principle and method of bolted joint and guidway joint, dynamic model of spring-damper element is built, make simulated analysis of joint part involved in the cutter and gain the dynamic performance of composite structure parameter.(5) Make sensitivity analysis of clasp, screen the important parameters and determine the reasonable scope of the parameters, finally, the important parameters as design variables, the stress value and deformation as constrained condition, total volume of clasp as target, make lightweight design of clasp,and the effect of weight loss is remarkable.The research work in the paper, reduces the overall quality of the machine tool, improves the effective rigidity of it and verifies that the machine has good ant-vibration performance, which has direct guidance to improve the static and dynamic performance of the BX0 style boring and milling machine. Repairing large diameter flange, it can use larger cutting power, to improve the processing efficiency, shorten processing time, and get the largest economic benefit and social benefit for the factory. At the same time, this paper studies has certain reference value for the improvement design of same machine key parts.