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A terminal powder real-time drying device and method

A drying device and powder technology, applied in heating devices, drying solid materials, heating to dry solid materials, etc., can solve the problems of unsatisfactory quality and cost of high-precision laser cladding, high maintenance cost of closed environment, etc. The effect of working environment requirements, reducing temperature difference, and fully absorbing

Active Publication Date: 2021-06-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the uncertainty of the closed environment of the equipment and the high maintenance cost of the closed environment in the actual situation, the quality and cost of high-precision laser cladding are generally not ideal

Method used

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  • A terminal powder real-time drying device and method
  • A terminal powder real-time drying device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Experimental process parameters: the pressure inside the heating tube cavity and the filter tube is 0.1MPa, and the powder feeding speed at the nozzle is 0.24cm 3 / min, cladding powder is IN718. The major diameter d1 of the external thread on the right side of the heater is 30mm, the depth d2 is 50mm, and the depth d3 of the filter element in the filter is 30cm. First, power off the coil and remove the filter element for powder feeding, take an appropriate amount of sprayed powder sample and put it into the powder moisture tester for testing; then turn on the coil, place the filter element in the filter tube, and carry out powder feeding sampling under the same process parameters, put into the powder moisture tester for testing. After inspection, the moisture content of the power-off and removal of the filter element is about 2-3%, and the moisture content of the powder after the power-on and filter element is about 0.2%, and the moisture reduction rate is as high as 9...

Embodiment 2

[0031] Experimental process parameters: laser power 1500W, pressure inside the heating tube cavity and filter tube 0.1MPa, powder feeding speed at the nozzle is 0.24cm 3 / min, scanning speed 250mm / min, cladding base material is IN718, cladding powder is IN718+30%WC. The major diameter d1 of the external thread on the right side of the heater is 30mm, the depth d2 is 50mm, and the depth d3 of the filter element in the filter is 30cm. First, power off the coil and remove the filter element to feed powder, and scan 10cm in a single channel; then power on the coil, place the filter element in the filter tube, and scan 10cm in a single channel under the same process parameters. Afterwards, the samples were cut and tested by XRD to observe the porosity. It was observed that the number of air bubbles in the cross-section of the sample obtained by turning off the coil and removing the filter element for powder feeding was 12. After the power was turned on and the filter element was a...

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Abstract

The invention relates to the field of special processing, in particular to a terminal powder real-time drying device. It consists of a heater and a filter, which are connected by threads. A certain number of coils are wound in the middle of the heating tube. Under the action of harmonic alternating current, local eddy current heat is generated, and the moisture in the powder is vaporized into water vapor. The principle of the filter is that when the mixture of powder and water vapor passes through the filter element, it will Under the pressure, it continuously collides with the filter film, so that the steam molecules pass through the filter film and are absorbed by the desiccant, while the powder is blocked outside the filter film, moves to the nozzle with the carrier gas, and acts on the surface of the workpiece through the laser beam. The invention can be used for laser cladding and laser 3D printing.

Description

technical field [0001] The invention relates to the field of special processing, in particular to a terminal powder real-time drying device and method. Background technique [0002] Laser cladding generally refers to the use of different types of cladding powders, cladding on the surface of the substrate under the action of laser high temperature, thereby forming a layer of cladding layer with excellent properties such as corrosion resistance, high temperature resistance, wear resistance, etc., to achieve surface modification or The purpose of repair is to meet the specific performance requirements of the material surface and save costs. Due to the high requirements for material powder and the entire working environment, high-performance laser cladding equipment is generally placed in a closed environment, so as to avoid the combination of water vapor in the air and powder, resulting in pores in the cladding layer. Porosity is a common defect in the laser cladding process, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B3/347F26B17/00F26B23/08
CPCF26B3/347F26B17/00F26B23/04
Inventor 霍坤戴峰泽周建忠
Owner JIANGSU UNIV