Based on plasma physics, basic characteristics of magnetofluid and discharge mechanism of the arc spot, this paper proposes a deposition technology on the inner wall of long tube by magnetic and electric field enhanced arc ion plating. The conical target material structure immersed in the axial magnetic field is adopted as the arc source of arc ion plating. Studies have shown that this technology can achieve the effective coating on the inner wall of long tube, which means to deposit the fatal (Ti, Al) N films at the depth of 120mm in the inner wall of the 20mm stainless steel component. The thickness of (Ti, Al) N film is 0.3-1.5m and its micro-hardness reaches 20GPa, which can significantly improve the wear resistance and corrosion resistance of the inner wall of the components, thereby increasing the service life of stainless steel components.
To analyze the Chinese herbal medicine drying system, vacuum and microwave technique, function principle and method are introduced in the paper. The necessity of the system is also put forward. The technology of the Chinese herbal medicine quickly drying in vacuum and microwave is studied and the principle of the design is introduced. Practical usage of the system shows that the equipment is full of good practicability and economic benefit.
The suction plastic forming process for in-mold decoration plastic sheet has been the best process for thin-shell plastic exterior decoration parts. But the suction plastic forming products still suffers from the uneven thickness. Based on the general finite element analysis software POLYFLOW for viscoelastic fluid, a set of optimization methods for suction plastic forming process of in-mold decoration plastic sheet is introduced in this paper to reduce the uneven level of thickness. These methods include establishing process optimization scheme, building mesh model, selecting the material constitutive model and determining its parameters, imposing boundary conditions and blowing pressure, and applying the mold movement. Finally, the optimized suction plastic forming process is used to produce the in-mold decoration plastic rear bumper sample of an automobile, and the results show that optimized process is effective and applicable.
In order to detect the arc plasma, an in-depth analysis on the relationship between the technology and film properties is conducted in this article. In addition, a fast scanning Langmuir probe diagnostic system suitable for transient plasma diagnosis is also designed, coupled with the design scheme and schematic diagram. Regard the integrated circuit of MAX038 as the core,and utilize FET to input high-fidelity operational amplifier OPA604 as well as high power amplifier PA93 to complete the intelligent saw-tooth wave sweep frequency power with the output amplitude of ± 100V, output frequency ranging from 10Hz to 10MHz as well as the adjustable frequency and duty cycle. Then test the output waveform and the results show that the power module can precisely generate triangle wave, saw-tooth wave, rectangular wave (including square wave) and sine wave signal.
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