Semi-open type atmosphere-protecting and water-cooling device for laser cladding

Abstract

The invention discloses a semi-open type atmosphere-protecting and water-cooling device for laser cladding. An atmosphere protecting box is fixedly arranged on an experiment table through supporting legs; a water-cooling assembly is fixed on the bottom of the atmosphere protecting box; the water-cooling assembly comprises a water-cooling pedestal and a clamping part; a plurality of water flow slots for cooling a base plate are formed in the water-cooling pedestal; a rubber gasket is arranged on a position, around the water flow slots, on the water-cooling pedestal; the clamping part is used for fixing an experiment base plate onto the water-cooling pedestal; gas-blowing assemblies are positioned above the water-cooling assembly, and are fixed at the two sides of the atmosphere protecting box in the form of a fan; each gas-blowing assembly is equipped with a plurality of micro gas outlets; and the top of the atmosphere protecting box is open, and is semi-open. With the adoption of the technical scheme, the semi-open type atmosphere-protecting and water-cooling device can effectively refine crystalline grains of a laser cladding structure, and reduces deformation of a base material;and moreover, oxidization and impurity pollution of a clad layer can be effectively controlled by inert gases, so that the comprehensive performance of a clad part is improved.

Description

Technical field [0001] The invention relates to the field of laser processing, in particular to a water cooling device for laser cladding atmosphere protection. Background technique [0002] Laser cladding technology refers to the method of spreading or feeding powder, placing specific metal material powder on the surface of the cladding substrate, using laser energy to melt it and a thin layer of the substrate surface at the same time, and quickly solidify to form a A metallurgical combined coating that significantly improves the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical characteristics of the base layer surface, so as to achieve the purpose of surface modification or repair, which not only meets the requirements for the specific performance of the material surface , And save a lot of valuable elements. Compared with surfacing, spraying, electroplating and vapor deposition, laser cladding has the characteristics of low dilution,...

AI Technical Summary

Problems solved by technology

[0003] During the laser cladding process, there is generally an axial shielding gas, which can form a local atmosphere protection, but this atmosphere protection is not sufficient. After the laser head is removed, the solidification process of the coating is completely exposed to the air. It is easy to oxidize and affect the surface properties of the coating

At present, the commonly used atmosphere protection devices include make-up blowing atmosphere protection, counter-blowing atmosphere protection, and complete atmosphere protection. However, when the blowing port is removed, the coating may still be oxidized, and when the laser head changes the moving direction, it is not very convenient to disassemble the makeup blowing device; 2) There is no atmosphere protection for the blowing type atmosphere protection device The box continuously blows air to the workbench through multiple air outlets at both ends, so that the surface of the workbench is always in an inert gas protection state, but the airflow generated by continuous blowing will change the airflow of powder feeding and affect the shape of the molten pool; 3 ) Complete atmosphere protection box is the most effective atmosphere protection device. The entire experimental platform and laser head are in an environment protected by inert gas, which completely eliminates the influence of air on the coating. However, the equipment protection box has a large space to create an atmosphere protection It takes a long time and requires a large amount of inert protective gas, which is not suitable for small and simple experimental research

Common laser cladding water cooling devices have some common problems: 1) The flow efficiency of cooling water is low, and the cooling effect is poor; 2) It is only suitable for substrates of specific sizes

[0005] When there is a need for atmosphere protection and water cooling in the laser cladding process, there is no device on the market that can meet these two requirements at the same time. It is necessary to design a product to solve the shortage of atmosphere protection and water cooling, and to meet the two requirements at the same time. item requirement

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