The selection of the design parameters of cemented carbide toolsdirectly affect the reliability of tool and work piece precision. Stress - strength interference (SSI) model, to establish the mathematical model, the dynamic reliability of cemented carbide cutting tool cutting tool in cutting process is given reliability. On the basis of this combined with sensitivity analysis method, carbide cutting tools of physical parameters and material parameters is deduced the formula of dynamic reliability sensitivity, and gives the dynamic reliability sensitivity of each parameter curves. The results show that as the machining time and with the increase of number of impact loading tool in the sensitivity of each parameter is also gradually increasing The sensitive parameters can be controlled by direct or indirect means to reduce the influence on the tool reliability, thereby improving the tool reliability and the precision of the processed parts.this method provides a theoretical reference for improving the reliability of the tool system and the whole machine tool.

With the rapid development and progress of metal cutting technology, and the improvement of the degree of automation, indexable cutting tools are more and more widely used. In the process of using cemented carbide tools, the blade is directly in contact with the processing workpiece parts, in the process of bearing a large external force, in order to meet the processing requirements, too much stress on the blade will produce damage, the damage of the blade will make the whole processing process to stop, thus affecting the processing efficiency. The maximum stress on the blade is mainly affected by the main deviation Angle, blade inclination Angle and other geometric angles, but the degree of influence of each factor on the blade is different. Therefore, it is necessary to determine the degree of influence of these factors and to control each factor reasonably. On the basis of summarizing the research status of reliability at home and abroad, this paper firstly establishes the three-dimensional model of indexable blade, analyzes the static characteristics of blade by using finite element method, and obtains the maximum static stress of blade. Secondly, in view of the shortcomings of previous numerical calculation methods for reliability, the neural network theory is introduced based on the reliable theory and the finite element method in blade mechanics solution, and the neural network technology is applied in the field of reliability sensitivity analysis and reliability robust design. The function of nonlinear mapping and approximation of arbitrary function of neural network are fully utilized.

With the development of high-speed and ultra-high-speed cutting, precision die and tool manufacturing, nano-machining and micro-machining, the requirement of cutting performance of cutting tools is increasing day by day. Compared with ordinary medium grain size and fine grain cemented carbides, ultra-fine wc-co class cemented carbides have higher hardness, abrasion resistance and transverse fracture strength.

Related link:

http://www.wococarbide.com/Transaction/en_article_info/id/851.html

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