Random fatigue design of universal joint in rolling mill main drive;

Why breakage happens at the flat head of universal joint in medium plate mill;

Inactivation analysis of cross head universal joint of main rolling mill;

4 drive universal spindle,was broken down in its root part,which caused failure phenomenon.

Based on the analyses of fracture sec tion,material phisical -chemical properties and its fatique strength for the universal spindle used in Bao-Steel teeming ladle transfer car,t he causes of the spindle failure were found.

The gear-petal style cardan shaft used in screw drilling tools;

The broken shaft trouble of SWC440 cardan shaft is checked and analyzed.

Firstly,the rule and cause of rupture failure for the cardan shaft of the DF 4D type freight diesel locomotive are discussed and Then,the methods on how to deal with the rupture failure of the cardan and the other failures resulted from the different small fuel quantity of different injection pump equipped on the same diesel engine are introduced.

The machining process for the key parts such as the assembling sleeve,notch and the inner threads of the connecting rod in the connecting rod type universal spindle has been described in this article,meanwhile based on the assembling relationship between the assembling sleeve,notch and the connecting rod,the assembling process between the assembling sleeve and notch has been defined as well.

The article introduces the modification scheme of main drive universal spindle for 750/1400mm/2800mm four high reversing hot roughing mill and demonstrates the feasibility of the plan by means of calculating the strengt

The FEM software(ANSYS) is adopted for the strength analysis of slide block universal spindle.