發(fā)布時間：2018-08-04 10:18

【摘要】：伴隨國內制造業(yè)的轉型,激光技術開始應用于工業(yè)制造領域。激光燒結快速成型設備也在迅速的發(fā)展壯大,為零件加工提出了新的解決方案。在復雜零件的加工上優(yōu)勢更加明顯。本課題針對現(xiàn)有激光燒結快速成型設備的控制成本高,與傳統(tǒng)數(shù)控加工設備兼容性低等不足。從降低設備的控制成本的角度出發(fā),設計了以Arduino為控制核心的低成本激光燒結控制系統(tǒng),詳細敘述了控制系統(tǒng)的硬件搭建方法,并對鋪粉模塊進行了優(yōu)化設計,對控制系統(tǒng)算法進行了研究及軟件設計。本文的主要研究內容如下包括:對激光燒結快速成型設備控制系統(tǒng)進行了總體設計。提出了設備硬件的構成方法,以及下位機軟件實現(xiàn)的任務和程序結構的規(guī)劃。完成了激光燒結快速成型設備硬件電路設計與搭建,提出了一種低成本的控制系統(tǒng)解決方案。其主要包括USB通訊模塊簡化設計、控制芯片低成本選型及其最小系統(tǒng)設計、對鋪粉模塊結構與控制方式的低成本優(yōu)化設計、控制系統(tǒng)電源設計。并對激光燒結快速成型系統(tǒng)軟件進行了設計與研究,設計了下位機的軟件任務包括:通訊任務、G代碼編譯任務、激光器控制任務、其它任務。將G代碼的解釋編譯工作移交給下位機,針對設備的特殊結構設計了對應的G代碼編譯算法,通過軟件的設計降低了硬件的成本。驗證了控制系統(tǒng)的穩(wěn)定性和加工時的重要參數(shù),本文通過對激光功率穩(wěn)定性測試、激光光斑運動速度測試、控制系統(tǒng)精度測試將測量數(shù)據(jù)與加工樣件對比驗證了控制系統(tǒng)的功率與速度的同步控制,激光掃描與鋪粉的協(xié)調控制方案可行。通過本課題的研究,在滿足加工要求的同時有效降低了激光燒結快速成型設備的硬件成本。
[Abstract]:With the transformation of domestic manufacturing industry, laser technology began to be applied in the field of industrial manufacturing. Laser sintering rapid prototyping equipment is also developing rapidly, which provides a new solution for parts processing. In the complex parts of the processing advantage is more obvious. This paper aims at the disadvantages of high control cost and low compatibility with traditional NC machining equipment. In order to reduce the control cost of the equipment, a low cost laser sintering control system with Arduino as the control core is designed. The hardware construction method of the control system is described in detail, and the optimization design of the powder laying module is carried out. The algorithm of control system is studied and the software is designed. The main contents of this paper are as follows: the control system of laser sintering rapid prototyping equipment is designed. The construction method of the hardware of the equipment and the programming of the task and the program structure of the software of the lower computer are put forward. The hardware circuit of laser sintering rapid prototyping equipment is designed and built, and a low cost control system solution is proposed. It mainly includes the simplified design of the USB communication module, the low cost selection of the control chip and its minimum system design, the optimization of the structure and control mode of the powder laying module, and the design of the power supply of the control system. The software of laser sintering rapid prototyping system is designed and studied. The software tasks of the lower computer include: communication task code compiling task, laser control task, and other tasks. The interpretation and compilation of G code is transferred to the lower computer, and the corresponding G code compilation algorithm is designed for the special structure of the equipment, which reduces the cost of hardware through the design of software. The stability of the control system and the important parameters in machining are verified. The stability of laser power and the velocity of laser spot motion are tested in this paper. The precision test of the control system compared the measured data with the machining sample to verify the synchronous control of the power and speed of the control system. The coordinated control scheme of laser scanning and powder laying is feasible. Through the research of this subject, the hardware cost of laser sintering rapid prototyping equipment is reduced effectively.
【學位授予單位】：湖北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG665

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