Dissertation > Excellent graduate degree dissertation topics show

Investigation on the Vertical Tin-plating Process for the Semi-flexible Coaxial Cable

Author: XiaoZuo
Tutor: ChengFangJie
School: Tianjin University
Course: Materials Processing Engineering
Keywords: semi-flexible coaxial cable vertical tin-plating flux pinhole defect
CLC: TG174.441
Type: Master's thesis
Year: 2012
Downloads: 32
Quote: 0
Read: Download Dissertation

Abstract


Holistic tin-plating on the outer conductor is one of the key process in the manufaction of semi-flexible coaxial cable. However, in the traditional horizontal tin-plating process, disadvantages such as the pinhole defects and low productivity effect cannot be avoided. The immersion length and the tin-plating time are the key factors that affected the tin coating quality. In order to solve the problems, such as the pinhole defects in the horizontal tin-plating process, a vertical tin-plating process was proposed in the present work. This new method can reduce the immersion length to 40mm-100mm and reduce the tin-plating time to less than 1.0s. The main missions of the research were to develop the key equipment for vertical tin-plating process, optimize the process parameter and develop a kind of special flux.The experimental results indicate that shorten immersion length and time are able to reduce the pin-holes, improve the tin coating quality and production efficiency obviously. The optimal process parameters were shown as follow: the molten tin temperature was 255℃~265℃,the immersion time was 0.5s~1s, the immersion length was 40mm-80mm, the speed of cable was 4m/min-6m/min.According to the requirement of flux, a kind of special flux with fast soldering speed and small gas generation was developed. The compositions of the flux were: A acid (1%), B acid (1%), cationic surfactant (0.3%), nonionic surfactant (0.1%) and alcohol.The minimum aperture between cable and guide hole was 0.2mm according to the calculation. A high temperature resistant rubber gasket was used to solve the problems of tin leaking and thread jamming, the aperture of the gasket was 3.5mm. In order to make the tin coating uniformity and brightness, a equipment was installed above the surface of liquid tin from 10mm~20mm to scrape redundant tin on the cable.

Related Dissertations

  1. Powered Activited Carbon-UF for Treating Micro-polluted Surface Water,X703
  2. Generalized Multi-Flux Method for Simulating Directional Radiative Transfer in Participating Media,TK124
  3. Parameterization Design and Research of Permanent Magnet Synchronous with Fractional-slot and Concentrated Winding,TM341
  4. Effects of Activating Flux on the Microstructures and Mechanical Properties of Tungsten Inert Gas and Laser Beam Welded AZ31 Magnesium Alloy Joints,TG407
  5. Application of Open Arc Welding in Casting Rolls Repair,TG455
  6. The Impact of Mass Transfer Effects on the TiO2 Photocatalytic Material in the Flow State of Water,X703
  7. Research on Automatic Detection Method of Surface Disfigurement on Steel Pipe,TG115.284
  8. Magnetic flux leakage is detected within the image recognition technology research,TP391.41
  9. Research on an Axial/Radial-Axial Flux Compound-Structure Permanent-Magnet Synchronous Machine Used for Hybrid Electric Vehicle,TM341
  10. Breeding of L-Valine Producer and Regulation of Its Fermentation Conditions,TQ921
  11. Research on Synthesis of Two N-type Compositions of Flux,TG421
  12. Effects of Elements Nb、V、Ti in Martensite Stainless Steel Deposited Metal,TG455
  13. Billet heating for energy optimization of information technology,TG335.3
  14. Physico-chemical Properties of Ammonia-free Flux in Hot-dip Galvanizing,TG174.443
  15. Heat Transfer Simulation of BF Cast Iron Cooling Stave and the Determinant Method for Liners Gas Gap of Hearth,TF573
  16. Study on Dye Wastewater Treatment with the New Membrane Bioreactor,X703.1
  17. Research on High-speed Railway Inclined Cracks Feature Recognition Using 3D MFL Technology,O346.1
  18. The Carbon Dioxide System in Seawater of North Yellow Sea and Qingdao Coast,P734.22
  19. Material Transport and Study of Dynamic Mechanism in the Yangtze River Estuary,TV148.1
  20. The Influence of High Volume Hemofiltration Treatment on the Expression of Triggering Receptor Expressed on Myeloid-1 in Patients with Sepsis,R459.7
  21. Numerical Simulation of Heat Sink with Combined Micro Channels and Jet Arrays for High Heat Flux Density,TK124

CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > Corrosion control and protection > Metal surface protection technology > Metal complex layer of protection > Electroplating
© 2012 www.DissertationTopic.Net  Mobile