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PID control method for ceramic laser direct forming deposition quality

A laser direct forming and control method technology, applied in the direction of ceramic forming machines, manufacturing tools, auxiliary forming equipment, etc., can solve the problems of effect limitation, achieve the effects of reducing cracks and pores, improving uniformity, and stabilizing cooling rate

Inactive Publication Date: 2019-03-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent will be limited by the heat preservation box during the cladding process and its effect can only be greatly limited

Method used

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  • PID control method for ceramic laser direct forming deposition quality
  • PID control method for ceramic laser direct forming deposition quality
  • PID control method for ceramic laser direct forming deposition quality

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Experimental program
Comparison scheme
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Embodiment Construction

[0026] In this case, this method is used to control the quality of ceramic deposition, according to Figure 1 The platform is built, and the implementation process is explained in detail. The steps are as follows:

[0027] 1) Pour the dried powder into a powder cylinder in the powder feeder 2 for ceramic forming test.

[0028] 2) Bind the colorimetric pyrometer on one side of the laser cladding head with a special fixture to ensure that the colorimetric pyrometer will not shake during the movement of the cladding head, which will affect the temperature measurement effect. The beam emitted by the colorimetric pyrometer and the laser beam intersect at one point on the substrate, and the diameter of the spot of the beam is larger than that of the laser beam, but smaller than the area of ​​the molten pool. The substrate is a zirconia ceramic substrate, and the size of the substrate is 80*80*5mm. The distance between the laser cladding head and the substrate is 15mm. The inert g...

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Abstract

The invention discloses a PID control method for the ceramic laser direct forming deposition quality. The PID control method comprises the steps of (1) controlling the size of a molten pool and changing the deposition height of a molded part deposition layer in the ceramic direct forming process; and (2) realizing the uniformization of the forming heights of different areas and different positionsby controlling the deposition height of the deposition layer. Through the PID control method, the problem that the deposition heights of parts in different positions are instable in the complex ceramic forming process is solved, and complex ceramic parts are formed through laser direct forming.

Description

technical field [0001] The invention relates to the fields of laser additive manufacturing and laser cladding, in particular to a PID control method for ceramic laser direct forming deposition quality. Background technique [0002] With the development of science and technology, the complexity requirements of ceramic parts in aerospace, biomedical and other fields are increasing. Laser direct forming of ceramics is a rapid prototyping technology of ceramics developed on the basis of metal direct forming. In the forming process, firstly, the parts are constructed by 3D software such as CAD, and secondly, the parts are sliced ​​by slicing software, and the path is optimized. On the basis of slicing, the part information is imported into the control system of ceramic direct forming, and high-quality ceramic forming parts are directly formed through layer-by-layer scanning, melting and accumulation. The key point in the forming process is the uniformity of the deposition heigh...

Claims

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Application Information

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IPC IPC(8): B28B1/54B28B17/00
CPCB28B1/54B28B17/0081
Inventor 张屹李发智张新旺隋长有韦海英
Owner HUNAN UNIV