Technology and device for welding periphery of plate layer of vacuum freeze dryer

Abstract

The invention discloses a technology and a device for welding the periphery of a plate layer of a vacuum freeze dryer, belonging to the technical field of pharmaceutical machinery welding. The technology comprises the following steps of: 1.1, welding and fixing a plate layer (3) and edge steel (2) by using an argon arc point welding mode; 1.2, moving a movable workbench (7) to a proper position, and tightly pressing the plate layer (3) through a pressing mechanism (11); 1.3, carrying out fine-adjusting on the height of welding guns (1), and moving the welding guns (1) to the outside of the plate layer (3) through a welding gun moving unit (9); 1.4, igniting the two welding guns (1) arranged at two sides of the plate layer (3) at the same time, carrying out self-fusing welding at first andthen carrying out wire filling welding; 1.5, hoisting the plate layer (3) again, and welding another welded wire in the same way; and 1.6, repeating the welding process in step 1.3 for a plurality oftimes until gradual welding is completed. The invention has the advantages that the technology process is simple, the plate layer is not easy to deform, the welded wire is even, the technology and the device are suitable for welding different specifications and sizes of plate layers and the like.

Description

technical field [0001] The invention discloses a welding process and device for the periphery of a vacuum freeze dryer plate, which belongs to the technical field of pharmaceutical machinery welding, and in particular relates to a welding process for a vacuum freeze dryer plate. Background technique [0002] Vacuum freeze dryer is a very common mechanical equipment in the field of pharmaceutical machinery. It is a new type of box structure that combines refrigeration system, vacuum system, heat transfer oil heating system and moisture removal system. Freeze-vacuum drying in which the material space in the body is dried. [0003] However, the internal structure of the vacuum freeze dryer plate is usually hollow and the periphery is closed. At present, domestic manufacturers mainly use the manual single-side welding process to weld the periphery of the vacuum freeze dryer plate, and the single-side welding method is very easy to cause damage. The amount of deformation is diff...

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Problems solved by technology

[0003] However, the internal structure of the vacuum freeze dryer plate is usually hollow and the periphery is closed. At present, domestic manufacturers mainly use the manual single-side welding process to weld the periphery of the vacuum freeze dryer plate, and the single-side welding method is very easy to cause damage. The amount of deformation is difficult to control, and the plate layer is easy to deform after welding. In serious cases, the plate layer product will be scrapped, causing large unnecessary economic losses. Manual welding is prone to false welding and cannot meet the edge sealing requirements.

[0004] Another welding method is to change the shape of the edge steel into rectangular steel, insert the edge steel into the periphery of the plate, and seal the edge by plug welding. The welding volume is large, the deformation is serious, and it is not easy to realize automatic welding, and it is prone to false welding , can not meet the edge banding requirements

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