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Molten pool temperature control method in laser cladding forming

A temperature control method and laser cladding technology, applied in coatings, instruments, electrical and digital data processing, etc., can solve the problems of small size, high brightness, difficulty in detection and control of molten pool temperature, and improve accuracy and efficiency. performance, the effect of reducing the amount of calculation

Pending Publication Date: 2020-10-09
JIANGSU UNIV
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AI Technical Summary

Problems solved by technology

At present, in laser cladding forming, due to the characteristics of high temperature, high brightness and small size of the molten pool, it has brought great difficulties to the temperature detection and control of the molten pool.

Method used

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  • Molten pool temperature control method in laser cladding forming
  • Molten pool temperature control method in laser cladding forming
  • Molten pool temperature control method in laser cladding forming

Examples

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Embodiment Construction

[0028] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] This example provides a method for controlling the temperature of the molten pool in laser cladding forming, such as figure 1 As shown, this example will start with image 3 Take the square flange with opening as an example to explain the detailed steps:

[0030] Step 101, input the system parameters, set the laser spot shape to be circular, the spot size to be 2mm, the overlap ratio to be 50%, the initial output power of the laser to be 1600W, the laser scanning speed to be 240mm / min, and the metal powder model used to be 316L, The initial ambient temperature is 25°C, the communication baud rate is set to 9600bps, the communication data verification method is cyclic redundancy check, and the laser power output control met...

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Abstract

The invention relates to the field of laser processing, in particular to a molten pool temperature control method in laser cladding forming. The control method comprises the following steps: a scanning path and output power are stored in a laser cladding process; mathematical models are constructed based on scanning paths, wherein the mathematical model comprises a geometric shape of a machined workpiece formed by combining virtual cubes based on the scanning path; according to the thermodynamic principle, analysis and calculation are carried out, laser power is converted into heat and servesas an attribute value of each cube, heat conduction analysis is carried out to obtain temperature information of the position near the next machining point, the temperature information is transmittedto a temperature controller, and therefore the accuracy and effectiveness of molten pool temperature control are improved.

Description

technical field [0001] The invention relates to the field of laser processing, in particular to a method for controlling the temperature of a molten pool in laser cladding forming. Background technique [0002] Laser cladding forming technology (Laser cladding forming, LCF) is a kind of laser cladding forming technology, which uses laser as the energy source, adopts the method of coaxial powder feeding or pre-laying metal powder, and sinters and superimposes the metal powder layer by layer on the substrate to form a three-dimensional workpiece. forming technology. This technology is mostly used for the improvement of material surface properties, product surface repair and rapid prototyping. It has the advantages of less heat input, high workpiece strength, and low material consumption. [0003] In the process of laser cladding forming, there is a complex transmission process of energy, momentum and mass inside the molten pool, resulting in phenomena such as mass transfer, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20C23C24/10G06F119/08G06F119/14
CPCG06F30/20C23C24/10G06F2119/08G06F2119/14Y02P10/25
Inventor 罗开玉唐小康鲁金忠
Owner JIANGSU UNIV
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