Welding method for freeze drier board layer and freeze drier board layer
A welding method and technology of a freeze dryer, which are applied in the fields of food packaging machinery and medicine, can solve the problems of high labor intensity, slow welding speed, waste of materials and work cycles, and improve the efficiency of heat transfer or refrigeration, and the materials used for welding The effect of thinning and improving labor efficiency
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[0032] The present invention will be further described below in conjunction with the drawings and specific embodiments of the specification.
[0033] In the method for welding the layers of the freeze dryer of the present invention, the layers include the upper plate 1, the lower plate 2, the side steel 3, and the square tube 4. The square tube 4 is welded between the upper plate 1 and the lower plate 2, and the upper plate 1 , The lower plate 2 and the square tube 4 are welded and fixed by plasma arc welding. The plasma arc is to apply a higher voltage between the tungsten electrode and the nozzle or between the tungsten electrode and the workpiece, and the gas is ionized by high-frequency oscillation to form a free arc. The arc is formed by the three compression effects of mechanical compression, thermal compression and electromagnetic contraction. Plasma arc. Plasma arc is a compressed arc with high energy density (up to 10W / cm2), temperature (about 24000K~50,000K) and arc for...
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