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Reserch on Facility of Control & Inspection in Plasma Powder Deposition Manufacture

Author: WangYuGuo
Tutor: ZhangHaiOu
School: Huazhong University of Science and Technology
Course: Digitized material forming
Keywords: Plasma Deposition Rapid Prototyping ARM Real-time control PMAC
CLC: TP274.4
Type: Master's thesis
Year: 2007
Downloads: 59
Quote: 0
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Abstract


Plasma deposition directly rapid prototyping is a low-cost rapid prototyping high melting point of full density metal parts, has a broad application prospects in the R \u0026 D and manufacturing of aerospace components. However, the plasma deposition directly rapid prototyping forming precision to be improved. The laboratory dedicated closed system transition to open CNC system CNC rapid prototyping system in plasma deposition system, plasma deposition process integration to achieve a numerical control unit and the deposited unit and milling unit matching coordination The closed-loop control, and also need to collect real-time control of various process parameters and deposition manufacturing process, an important part of this research. This paper studies the plasma deposition rapid prototyping equipment Deposition control unit design using ARM embedded microprocessor and an external signal conditioning circuits constitute the deposited control hardware system, embedded software platform developed lower machine control software program high performance data processing and logic execution functions. The plasma deposition control unit performance LPC2136 32-bit ARM7 industrial-grade processor as the core of real-time control system, manual control and automatic timing control of the deposited; design the peripheral signal conditioning circuit, the analog signal of the external process parameters converted into a digital signal transmission to a PC;, data communication via the host interconnect RS-232 serial interface; PMAC motion control board signals interact to achieve the coordination function of machine movement and deposition control. In-depth study of the accurate sampling of the deposited timing control process and external process parameters and Deposition Control protocol definition. The software system consists of the two parts of the drive control module based between the various control tasks in embedded real-time operating system platform management module and on-chip peripherals. The task management module is used to create and priority setting, the task of the software and task scheduling. Initialize and start the drive control chip peripheral module used to register the control unit function module, such as A / D sampling module, I2C driver module, UART communication module, input / output modules, etc.. Mainly to complete the acquisition of the analog signal, the data transmission and reception, the signal amount of input and output cards, and PMAC coordination protocol identification functions. This system is a complete hardware and software control functions, not only can achieve independent control and process parameters of the deposited sample, but also to establish contact between the PMAC board, constitute the plasma deposition of an important part of the closed-loop control. In addition, the software system has a high degree of openness, provides a good platform for the expansion and further development of the system function.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Centralized testing and roving detection system
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