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A self-adaptive control system for powder-feeding laser additives

An adaptive control and laser additive technology, which is applied in the direction of adaptive control, general control system, control/adjustment system, etc., can solve the problems of forming shape deviation and insufficient mechanical properties, and achieve the effect of convenient online detection and real-time control

Active Publication Date: 2021-05-14
中国兵器装备集团自动化研究所有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the traditional control technology in the process of laser additive manufacturing, which is prone to the problems of forming shape deviation and insufficient mechanical properties, and proposes a powder-feeding laser additive adaptive control system

Method used

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  • A self-adaptive control system for powder-feeding laser additives
  • A self-adaptive control system for powder-feeding laser additives
  • A self-adaptive control system for powder-feeding laser additives

Examples

Experimental program
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Effect test

Embodiment 1

[0069] Figure 4 , Figure 5 shown

[0070] An adaptive control system for powder-feeding laser additives, including the following subsystems:

[0071] CS1-process system: Adem three-dimensional slicing software completes trajectory path planning and generates a .txt file that can be recognized by the robot controller, and imports the motion points generated by .txt into the robot controller of the equipment system through FTP communication to complete the augmentation process. Material manufacturing trajectory planning process;

[0072] CS2-equipment system: including print head, powder feeder, laser, robot, vacuum purification device, peripheral equipment, among which the print head mainly completes the optical path and powder output task; the laser is used to generate heat source; the powder feeder is responsible for providing raw materials; the robot It is the terminal mechanism that executes the motion trajectory; the vacuum purification device completes the creation o...

Embodiment 2

[0084] by Figure 4 ,with Figure 5 As an example: an adaptive control system for powder-feeding laser additive materials:

[0085] First realize the construction of the adaptive control system of the present invention through the following processes:

[0086] S1: First build the hardware platform of the control system. Take Beckhoff-C5102-IPC industrial control as the basic platform of the control system, and use it as the lower computer. The human-computer interaction of the whole system is completed with the Beckhoff-P6942-HMI touch screen as the upper computer.

[0087] S2: The lower computer completes the I / O digital and analog control of the powder feeder, robot, vacuum device, water cooling and other equipment through Ethcat communication, completes the communication with the purification device through Modbus RTU, completes the communication with the laser through DeviceNET, and completes the communication with the laser through USB. Complete with temperature senso...

Embodiment 3

[0109] In order to cooperate with the above-mentioned self-adaptive control system, this embodiment makes the following examples for the implementation process of the laser three-dimensional forming process detection system, that is, the online monitoring system:

[0110] The detection method of the online monitoring system is:

[0111] Step 1: Obtain the process parameter data of each equipment operating state through the equipment operating state detection device, and obtain the three-dimensional appearance of the part or the current layer or the molten pool area and its vicinity during the laser three-dimensional forming process through the structured light three-dimensional shape detection device 3 The surface topography data of the thermal component, the molten pool data in the image form of the molten pool shape, plume and splash during the laser three-dimensional forming process are obtained through the CCD molten pool detection device 1, and the molten pool data during ...

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Abstract

The invention belongs to the technical field of additive manufacturing control, and in particular relates to an adaptive control system architecture for powder feeding type laser additive manufacturing. The system includes a complete set of system architecture including process planning, equipment composition, industrial control system, data acquisition and display, data management, online detection, and PSD control. Through the adaptive control system, not only the forming quality and forming accuracy of powder feeding laser additive can be significantly improved, but also the purpose of increasing the strength of the formed parts and reducing the external defects of the formed parts can be achieved.

Description

technical field [0001] The invention relates to the field of intelligent manufacturing, in particular to an adaptive control system for powder-feeding laser additives. Background technique [0002] In the powder-feeding metal direct deposition forming process, there are factors such as different processing paths, changes in the height of the substrate or accumulated materials, and fluctuations in process parameters, which will lead to dynamic changes in process conditions such as temperature gradients and heat conduction conditions in the processing area and near the molten pool. Changes, laser additive manufacturing or repair parts will have quality problems such as reduced mechanical properties and reduced geometric accuracy. At the same time, there are problems such as multi-physical field coupling, many unstable factors, and a large solidification rate of the molten pool in the forming process, which leads to macroscopic defects such as warping, cracking, and abnormal di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 刘广志王敏张震陈波张馨月郎军
Owner 中国兵器装备集团自动化研究所有限公司
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