The Effect of the Thread Rolling Conditions on the Fatigue Strength of the Rolled Screw Threads : 2nd Report, Rotating Bending Fatigue Strength of the Specimens with a Rolled V Groove

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概要

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• In order to clarify the effect of rolling conditions on the fatigue strength of rolled screw threads, the V grooves were rolled on cylindrical specimens and the rotating bending fatigue tests were carried out on these specimens. For this purpose a simple rolling attachment was designed and manufactured. The rolling pressure in the case where the V grooves were rolled by this attachment, was measured. This rolling process was analysed, and compared with the process of thread rolling. In the experiment the rolling conditions of the V groove were changed by varying the number of revolutions of the specimen during rolling process. The specimen materials were medium carbon steel cold worked and Cr-Mo steel quenched and tempered. As a result it was found that the endurance limits of the specimens with a rolled V groove were 2.5〜2.8 times higher than those of the specimens with a cut V groove. Statistical analysis has shown that there exists a definite relationship between the rolling condition and the endurance limit.

• 一般社団法人日本機械学会の論文

著者

• YOSHIMOTO Isamu

  Tokyo Institute of Technology.

• Yoshimoto Isamu

  Tokyo Institute Of Technology

• Yoshimoto I.

  Tokyo Institute of Technology

関連論文

• Investigations on the Differential Speed Type Thread Rolling Machine : 2 nd Report, Rolling Power and the Calculation of the Outside Diameter of Rolling Die
• Investigations on the Differential Speed Type Thread Rolling Machine : 1 st Report, Rolling Pressure and the Calculation of the Center Distance between Rolling Dies
• The Rolling Pressure of the Flat Die Type Thread Rolling Machine
• Fatigue Test by Staircase Method with Small Samples
• The Effect of the Thread Rolling Conditions on the Fatigue Strength of the Rolled Screw Threads : 2nd Report, Rotating Bending Fatigue Strength of the Specimens with a Rolled V Groove
• Characteristics of Threaded Joints in Ultrasonic Vibrating System
• The Effect of the Thread Rolling Conditions on the Fatigue Strength of the Rolled Screw Threads : 1st Report, Investigations on the Thread Rolling Conditions
• The Effect of the Thread Rolling Conditions on the Fatigue Strength of the Rolled Screw Threads : 3rd Report, Rotating Bending Fatigue Strength of the Specimens with a Rolled V Groove, Part 2

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