Forging speed’s response characteristic of moving beam drive system for 300 MN die forging hydraulic press;

Synchronization precision of the moving beam in a huge water press is a very crucial parameter.

Taking L-C combined brake beam as an example,this paper proposes the control law for the optimum design of brake beam body under the equivalent life principle and suggests that overload on the end of the strut is the main reason of such failure by analyzing the failure modes of the brake beams on freight cars.

Through research about three years,this paper raises placing caving window on end beam,low caving changed,middle-low caving ,movable roof is established before head support,it gets purpose for improving "triangle caving" output and wood shed safely retrieve.

The article introduces a technique of repairing the crack in the moving crosshead of an extrusion press, based on CO2 gas shield welding.

Theoretical analysis of low-frequency noise radiated from bridge vibrations;

Based on the 1/4 models of motorcar,the model of simple supported beam was used with constant moving load to simulate bridge vibration and the half sine curve was used to simulate the bridge floor longitudinal curve when bridge upwards formed.

The train-bridge vibration characteristic is analyzed by this program when mix-marshalling freight trains traverse a 32-meter-span prestressed concrete simple beam bridge.

Welding reparation for movable crossmember of 120MN water press;