Abstract The rubber lining in a condensate polishing system of nuclear power plant exhibited significant blistering and cracking shortly after the operation, posing safety risk to chlorine storage tank. Extensive analysis, including thermal gravimetric infrared spectroscopy, mechanical testing, scanning electron microscopy, was conducted assess thoroughly. Subsequently, underwent 72-hour immersion test 31 % hydrochloric acid at 50°C evaluate its performance. results revealed that content...

In the paper, characteristics of mode and harmonic response axis high-speed motorized spindle are presented with FEM (Finite Element Method). A dual-dimension model is developed simulated using ANSYS commercial software. The result shows that rated rotating speed far smaller than first-order natural resonance speed, dynamic displacement stiffness do not change significantly compared static performance working spindle. in accord requirements design.

Accurate prediction of the remaining useful life for cutting tool is a key part predictive maintenance computer numerical control machines. However, wide variety tools makes process modeling different wear regularities redundant and cumbersome. In addition, it difficult to deal with input characteristics multi-sensor monitoring signals in targeted manner. To solve above problems, hybrid model squeeze-and-excitation (SE) module proposed. Combined adaptive feature extraction based on...

A reasonable micro-pits texture has been initially proved that it can improve friction characteristics between wood and cemented carbide surface reduce coefficient.In order to study the cutting performance of micro-texture when is applied tool for more effectively, this paper selected micro-pit studying influence on temperature, finding adopted turning northeast China ash (Fraxinus spp.), force coefficient rake face cuttings.Moreover, type B tools, parameters are diameter 80μm, depth micro...

In this study, a mathematical model of tangential tensioning stress in the edge circular saw blade tensioned by multi-spot pressure was established theoretical analysis for quality control blades.The process assumed to include three mechanical processes: one-spot process; elastic deformation disk with through-hole subjected uniform, radial compressive stress; and superposition process.The on could be accurately predicted model.The shown correct measured values.

In view of the fact that most existing research on pitting failure ball screw focuses vibration signal experiment and establishment degradation model, use more intuitive visual aspects is less, deep learning studied in detection surface screw. The application Faster R-CNN Mask two network models were built, compared analyzed through experiments. results show both can guarantee high classification accuracy under different rates, excellently complete task While locating eclipse, mask output...

The grey system theory is a new technique for performing prediction, relational analysis, and decision making in many areas. In this paper, analysis was used to optimize the machining parameters with multiple performance characteristics micro hole vibration drilling. Experiments were conducted on computer numerical control vertical centre L9 orthogonal array chosen experiments. drilling namely frequency, amplitude, feed spindle speed optimized based including positional error, aperture burr...

In this paper, the corrosion performance of galvanized steel was investigated in a simulated marine environment, under UV irradiation coupling with an alternating wet and dry cycle NaCl solution. The surface morphology, composition, before after different were investigated. results show that current density gradually increases resistance decreases as function cycles. Meanwhile, accelerates increase decrease resistance. addition, product ZnO shows semiconductor property, photo-induced...

Aiming at the feasibility of intelligent adaptive control for a machining process, new network architecture, called hybrid recurrent neural (HRNN) is first presented based on diagonal (DRNN). Considering uncertain information in generalized entropy square error (GESE) criterion then proposed. The learning algorithm HRNN and mathematic model machine tool experiments are also explained. Finally, applied to constant force process. Simulated results verify effectiveness proposed schemes. And...

In order to understand the relation between advance rate of single seam working face and gas drainage volume, parameter concentration, differential pressure, temperature, absolute pressure is measured in pipelines after highly or low-located holes method adopted 1306 strike.The volume put forward by means regression analysis method.The study results show that turn rising slowly, quickly then stabilizing totally with stoping face.As number boreholes continually increased, not significantly...

Abstract We used microtextures to develop a novel antifriction technology for wood cutting tools. Northeast China ash ( Fraxinus spp.) was selected as the research species, and influence of microtexture on friction coefficient cemented carbide samples with without texture studied using various loads moisture content. The results showed that reasonable form (d = 40 μm) can effectively reduce between regardless in is conducive reducing surface. Its mechanism action affected by content, load...