Failure Analysis of a Die for Cold Precision Forging of Bevel Gears

Jun Song Jin; Ju Chen Xia; Xin Yun Wang; Hua Liu

doi:10.4028/www.scientific.net/AMR.44-46.779

Paper Titles

Probabilistic Critical Fatigue Safety State of the RD2 Type Axle of China Railway Freight Car
p.751

Probabilistic Critical Safety Wheel Wear Sizes of Chinese Railway Freight Cars
p.759

Damage Analysis of Glass-to-Metal Diffusion Welded Joints
p.765

Reliability Design Method for Interference Joint in Mechanical Engineering
p.773

Failure Analysis of a Die for Cold Precision Forging of Bevel Gears
p.779

A Study on Optimal Inspection Strategies of Reliability Systems with Parallel-Chain Precedence Constraints under Failure States
p.787

Product Reliability Assessment Method Combining Degradation Data and Lifetime Data
p.795

Study on Service Life of Last Stage Blade with Damped Structure in Large Power Steam Turbine
p.803

Online Forecast of Fatigue Life in Welded Grider of Bridge Crane
p.809

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 44-46Failure Analysis of a Die for Cold Precision...

Failure Analysis of a Die for Cold Precision Forging of Bevel Gears

Abstract:

The life of bevel gear dies is determined by its stress state mainly. During the forging, the die teeth fractured and the bottom corner cracked in a few times. Finite Element Analysis (FEA) was employed to investigate the reason of failure. The results show that the tip fracture and the bottom corner crack mainly resulted from excessive tensile stress. In accordance with the FEA results, the non-plane parting face was changed into plane parting face and the radius of bottom hole was enlarged. The FEA result proves that the modification can greatly reduce stress concentration and the application proves that the modification can effectively solve the premature failure of the die.