Abstract: Solid-state nanopores have drawn the interest of numerous researchers due to their excellent mechanical properties, stability, and shape control, which have demonstrated tremendous potential in gene detection, protein detection, energy conversion, material separation, and water purification. And sha...
Under the background of the comprehensive implementation of the National Carbon Peak Carbon Neutralization Action, the superhard material industry energy consumption research was carried out. It aims to promote the superhard material industry to make new contributions to the green, low-carbon and hi...
Abstract: PDC bit has become the preferred type of drill bits in the field of oil and gas exploration. The ever-increasing performance requirements of PDC bits, especially the drilling efficiency, have brought great challenges to the drill bits. The improvement of the drill bit working face structure is cruci...
Abstract: The characteristics of rock cuttings are important factors affecting their annulus upward return. The indoor micro drilling experiment was carried out to study the characteristics of rock cuttings produced by impregnated diamond bit breaking granite. It is found that the rock cuttings produced by br...
Abstract: FeCoCu pre-alloy powder was added into tungsten carbide matrix to find out the influence law of FeCoCu content and sintering temperature on matrix performance, aiming to improve the adaptability between bit matrix wear resistance and formation abradability and to enhance the self-sharpening ability ...
Abstract: PDC bits have been working in a worn state for a long time. To explore its cutting performance and avoid premature failure of the bit, this paper analyzes the load on the worn teeth and the drilling characteristics of the bit through single tooth cutting experiment and full-scale wear bit drilling e...
Abstract: In order to obtain better drilling effect in the conglomerate layer, it is necessary to optimize the tooth shape and caster angle of PDC bit for the conglomerate layer. Single tooth rock breaking experiments are conducted on ordinary plane teeth, conical teeth and axe teeth in the conglomerate rock ...
The direct ink writing (DIW) technology of slurry is a 3D printing technology based on slurry extrusion. It has the advantages of low energy consumption, low cost, fast printing speed and no structural design restrictions. On the basis of summarizing the advantages of the application of DIW technolo...
Abstract: To study the microstructure and the thermodynamic properties of lubricants, as well as their effects on the structure and mechanical property of wet-forming or sintered materials, different lubrication release agents are added into metal abrasive tools which are fabricated with wet forming and degre...
Abstract: In order to integrate various processes in composite dressing method more systematically and improve dressing efficiency of forming grinding wheel, a CAM system was developed by combining self-developed laser and mechanical composite dressing equipment. According to different grinding wheel section ...
Abstract: The thin-wall shell parts manufactured by quartz fiber reinforced ceramic matrix composites have low machining efficiency and bigger cutting force, which can easily lead to broken parts and bad surface roughness not meeting the requirements. To solve these problems and seek feasible cutting tool and...
The processing damages such as delamination and tearing were easily produced during the drilling of the sleeve holes of GFRP, which were directly related to the axial drilling force. In order to improve the quality of GFRP hole-making, a new diamond thin-wall trepanning tool was adopted; and combine...
Six kinds of diamond electroplated bits, whose diameters were 0.280～0.440 mm and the basic particle sizes of diamond were 20～30, 36～54 and 63～75 μm, were used to drill micro holes of three-dimensional needle-punched felt-based C/SiC composite materials. The optimum processing parameters of the six k...
In order to improve the efficiency and quality of diamond wire saw cutting and meet the demand of real-time monitoring of saw wire wear, a detection algorithm based on improved YOLOv5 was proposed. The algorithm combined coordinate attention mechanism and BiFPN module on the basis of YOLOv5. The det...
To investigate the influence of the installation angle of specimens on the finishing effect of the cross hole connecting part, vibration finishing technology of cross hole specimens is simulated and analyzed based on the discrete element method. The results show that the machining uniformity of the ...
Abstract: The internal multi cooling channels of aviation turbine blades, mostly processed by lost foam casting, have high surface roughness, low cooling efficiency, small internal channel section and S-shaped bending and narrow distribution, and are not easy to polish. The Polyflow software is used to simula...
Abstract: In order to explore the surface grinding quality and subsurface damage law of the grinding depth on the diamond material, the model of diamond workpiece ground by multi grits is established by molecular dynamics (MD) method. The effect of different grinding depths on the grinding force, the grinding...
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