Influence of feeding speed of rail continuous flash welding on welding process;

In this paper,the effect of feeding speed on peen forming is studied thorugh experiments,which shows that chordwise peen forming deformation is the exponential function of feeding speed.

In this paper the extrusion pressure between the stud and the workpiece during stepping arc stud welding process is acted as the controlled variable so as to control the stud plunge depth.

Numerical simulation of air supply velocity on air conditioning effects;

Experimental result shows better use effect can be reached by means of setting reasonable air supply direction and air supply velocity.

Based on the theory and experiment research of the characteristic of the refrigerated vertical open display cabinets, the method of reasonably select the main structural parameters including air supply velocity,evaporator structure and defrost cycle etc were discussed.