Abstract: The cutting experiment for nickel-based supper alloy Inconel 718 was performed by using two different coated inserts, which studied the wear morphology and wear mechanism of the tools and analyzed the effect on tool life from different coating. The results showed that when continuous cutting is performed under same cutting conditions, the capability of WSM10 to resist oxidation and adhesive is higher than TS2000, and the tool life of WSM10 is longer than TS2000. The reason why WSM10 has a better cutting performance than TS2000 is related to the coating material. Comparing with the TiN coating of TS2000 surface, the A1203 coating of WSM10 surface has a higher hardness, better chemical stability and oxidation resistance capability. The study provides a useful reference for the selection of cutting tools which used for machining Inconel 718.
Abstract: FBG (fiber Bragg grating) sensors are appropriate for embedding in composites manufacturing engineering. Influence of embedding FBG sensors on the composites tension, compression, CAI properties was studied in this paper. Results identified that the mechanical properties decreased obviously when a certain volume content of optical fibers embedded. FBG sensor permits the continuous monitoring of the host material when embedded in the middle 0 degree layer, consistent with strain gauges. Sensitivity coefficient of FBG sensor embedded is almost the same as that not embedded. It offers important reference value on the application of FBG sensors in aerospace composites.
Abstract: A series of Al-Cu-Si alloys were melted and spun into ribbons of about 100m thickness. The alloy compositions were selected to be suitable for brazing below 580C as filler metals. In the as-quenched state the foils were relatively brittle due to the occurrence of metal metastable phases. After appropriate annealing treatments between 400~450C the metastable phases were transformed into fine (Cu2Al) particles within the -Al matrix, and the mechanical properties of the Al-Cu-Si alloy ribbons were considerably improved.
Abstract: The Ba1-xLaxFe12O19 (0.0≤x≤0.6) ferrite materials were prepared by the standard solid state reaction technique method and sintered at 920 °C with 4 wt% Bi2O3 and at 1150 °C without Bi2O3 in air. The influence of La3+ contents on the microstructure, density, and magnetic properties were studied. The XRD results showed essentially single phase spinel structure. The SEM images of the samples had no obvious relationship with the substituting value. Saturation magnetization continuously decreased from 59.37 emu/g to 57.93 emu/g with sintering temperature from 1150 °C to 920 °C. However, coercive force reached the value of 4547.0 Oe when x=0.6 at 920 °C. The density of the samples also decreased monotonously with increasing x value.
Abstract: A blanking method which can punch the sheet metal without burr is presented, this method is divided into two stages: preloading deformation and blanking. And the FEM software DEFORM-2D is used to simulate the blanking process of burr-free of stainless steel AISI304. By changing the size of relative clearance, analyzing the quality of cross-section and blanking process. The result shows that the clearance has an effect on blanking force and the length of shear zone. which provides the certain fundamental for predicting the defects of blanking pieces and designing the molds. And this method has an important application value in manufacturing engineering.
Abstract: Spherical surface weld defects greatly reduce the potential effects of corrosion, produce sliding deformation, and cause the breaking of passivation film; the IGSCC has been finally caused by the solution of the Cr Poor zone under the field environment with high CI content. D107 electrode has low carbon content, the less strain concentration at the grain boundary due to without sliding deformation in the grain under the action of welding residual stress, and less stress corrosion cracking. 2-layers of the D107 weld metal should be welded at least when grinding which has good stress corrosion resistance performance in material engineering
Abstract: By orthogonal design method, Catalytic activity of /ZrO2 solid superacid is studied, and the influence of catalyst characteristic and structure by manufacturing equipment is issued. It is concluded that the best prepared conditions of the superacid catalyst /ZrO2 for the synthesis of Octyl-Polyglycoside are followed:(1) PH=9.5; (2) calcined temperature at 500; (3) M(H2SO4)=0.5mol/L. Using this kind of catalyst the conversion of glueoside may reach as high as 96% in the synthesis of OCtyl-Polyglycoside and the selectivity is very high for the synthesis of Octyl-Polyglycoside. By introducing other metal oxide, the catalytic activity of complex solid superacid is studied.
Abstract: Since the small inter-electrode gap (IEG), high current density applied, high heat generated and redundant reaction product, the convection of electrolyte in IEG becomes an important factor for the stability of electrochemical micro-machining (EMM) in manufacturing engineering. In this paper, a novel structure of cathode used in EMM is presented. The proper experimental parameters are established from the simulated results. The hollow cathode, which is much more conductive to the flow, has been designed and fabricated on the basis of non-silicon surface micro-machining technology. The experimental test showed the improvement of current stability, and is consistent with the numerical simulations.
Abstract: Mini wind generator is an efficient way to save electricity and develop the potential green wind energy in city environment. The material and structure design of the supporting frame is a key factor to ensure the generator work fluently and safely for manufacturing engineering. In this research, the dynamic properties of the frame with different structure materials are analyzed by finite element method. The epoxy frame has the fewest number natural frequencies coinciding with the generator working revolution frequency. And the mode shapes of epoxy frame of different orders are achieved by FEM. A new kind of analytical method, key node component-displacement criterion is proposed with respect to the displacement characteristic of the frame under different mode orders. This criterion provides a new approach in evaluating the deformation characteristic of the dynamic properties of mechanical structures.
Abstract: In this paper, wool yarns and the slenderized wool yarns were used as raw materials, and knitted under the same process parameter, many methods of testing were applied to analysis the wearing characteristics, An series of experiments show that there was a significantly improvement in the anti-pilling performance and air permeability, and the stiffness of the sample became smaller, increasing soft and comfort, but it had little effect on crease- resistance. The slenderizing not only improved the spinning count, but also enhanced the knitted properties by the structural transformation, was a good choice to develop the high-grade wool knitwear.