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Vacuum Diffusion Welding Process of Vacuum Freeze Dryer Laminates

A vacuum freeze-drying and vacuum diffusion technology, applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of high welding cost, complex process, poor temperature uniformity of the board layer, etc., to achieve fast welding speed and simplify welding process. , good welding effect

Active Publication Date: 2016-04-27
王松松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a vacuum diffusion welding process for the plates of a vacuum freeze dryer to solve the problems of high welding costs, poor plate temperature uniformity and complex processes in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A vacuum diffusion welding process for the plate layer of a vacuum freeze dryer, using solid spacers, the upper panel and the lower panel are made of 316L stainless steel; ; Then in the vacuum diffusion welding furnace, some laminated plates are welded, and the specific process steps are as follows:

[0016] (1) Use argon arc welding to spot-weld the spacers on the upper and lower panels, and then stack the corresponding spot-welded plates together according to the specifications of the vacuum diffusion furnace, and place a layer of aluminum foil coils between the plates;

[0017] (2) Then put the board into the vacuum diffusion furnace, start the hydraulic mechanism in the vacuum diffusion furnace to form a certain pressure on the surface of the board, and then start vacuuming to make the vacuum degree reach 5.0×10 -4 Pa, and then increase the temperature. When the furnace temperature reaches 1100°C-1300°C, the hydraulic mechanism will continue to increase the pressure...

Embodiment 2

[0020] A vacuum diffusion welding process for the plate layer of a vacuum freeze dryer, using solid spacers, the upper and lower panels are made of 316L stainless steel; the spacers are made of 304 stainless steel, and the spacers are spot-welded on the upper and lower plates by argon arc welding ; Then in the vacuum diffusion welding furnace, some laminated plates are welded, and the specific process steps are as follows:

[0021] (1) Use argon arc welding to spot-weld the spacers on the upper and lower panels, and then stack the corresponding spot-welded plate layers together according to the specifications of the vacuum diffusion furnace, and place a layer of ceramic sheets between the plate layers;

[0022] (2) Then put the board into the vacuum diffusion furnace, start the hydraulic mechanism in the vacuum diffusion furnace to form a certain pressure on the surface of the board, and then start vacuuming to make the vacuum degree reach 8.0×10 -4 Pa, and then increase the t...

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PUM

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Abstract

The invention discloses a vacuum diffusion welding process for vacuum freeze drier plate layers. Firstly, solid partition strips are adopted and welded to an upper face plate and a lower face plate in a spot welding and argon arc welding mode, and then the plate layers which are stacked together are welded in a vacuum diffusion welding furnace. According to the vacuum diffusion welding process, the solid partition strips are adopted and welded under certain pressure through the vacuum diffusion welding furnace, the welding speed is high, the welding effect is good, the welded plate layers are high in heat exchange efficiency and have excellent temperature uniformity, the welding cost of the vacuum freeze drier plate layers is lowered, and the welding process is greatly simplified.

Description

technical field [0001] The invention relates to the technical field of pharmaceutical machinery, in particular to a vacuum diffusion welding process for vacuum freeze dryer plates. 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] The internal structure of the vacuum freeze dryer plate is hollow, and the middle is filled with a heat-conducting medium. In order to ensure that the heat-conducting medium can flow evenly in the plate, there are spacers inside. At present, the welding process of the vacuum freeze dryer plate is roughly divided into two types. Type: One is the internal welding method, that is, the spacer is composed of two special-shaped profiles, the upper spac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/14B23K20/26
CPCB23K20/14B23K20/26
Inventor 王松松
Owner 王松松