THE EFFECT OF THE SURFACE BURNISHING PROCESS RELATED TO THE FATIGUE OF THE JOINT SHIP SHAFT - PROPELLER

Causes of ship shaft cracking and the possibilities of increasing a shaft's life were analyzed. The effect of increasing its fatigue strength by the application of roller burnishing was investigated using a conic joint model and its rotate bending. The diameter of the test piece was 25mm and was made of 35 steel, the bush was made from Novoston alloy. These bushes were forced on the cones so that the value of the superficial pressure was the same as the real ship shaft joint. The burnisher rollers diameter was 60mm with 20mm profile radius. The burnishing was performed due to hydraulic 3-rollers head, mounted on the toolmaker's lathe. This experiment showed that the fatigue strength curve alpha =f(F), as a function related to roller clamp force F, has its optimum for F = 3 kN. As a result of the research is was found that burnishing of the conic test piece increases the safe fatigue life by about 30%, comparatively to the grinding operation. The fatigue strength of the ground test pieces was about 208 MPa, and of the burnished with 3kN force, about 260 MPa.

• Supplemental Notes:
  • Polish Academy of Sciences, Gdansk, Marine Technology Trans, v 4, 1993, p 114 [21 p, 10 ref, 4 tab, 12 fig]
• Authors:
  • PRZYBYLSKI, W
• Publication Date: 1993

Language

• Polish

Subject/Index Terms

• TRT Terms: Concrete finishing; Fatigue (Mechanics); Fatigue strength; Propeller shafts; Seal coats
• Uncontrolled Terms: Fatigue life
• Subject Areas: Construction; Marine Transportation; Materials; Pavements; Vehicles and Equipment;

Filing Info

• Accession Number: 00716137
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Feb 28 1996 12:00AM