本文選題：不銹鋼管 + 等離子切割機(jī)��； 參考：《山東理工大學(xué)》2017年碩士論文

【摘要】：在實(shí)際生產(chǎn)生活中,管管和管板相貫的型式隨處可見(jiàn),每一種相貫型式均對(duì)應(yīng)一種相貫曲線。相貫曲線通常是一種復(fù)雜的三維空間曲線,相貫曲線的類型主要取決于相貫體的形狀、大小和相對(duì)位置。為了加工出滿足焊接工藝要求的焊接坡口,實(shí)現(xiàn)管管或管板的理想相貫搭接,對(duì)相貫線切割提出了較高的技術(shù)要求。本課題研究的不銹鋼管相貫線等離子切割機(jī)主要用于不銹鋼相貫端面的成形切割。本課題針對(duì)不銹鋼圓管-圓管和圓管-方管兩種相貫型式,研究了空間相貫線的形成機(jī)理,確定了不銹鋼管相貫線等離子切割機(jī)的機(jī)械結(jié)構(gòu),采用四軸多聯(lián)動(dòng)控制方式實(shí)現(xiàn)了相貫線的準(zhǔn)確切割,利用SolidWorks軟件繪制了相貫線等離子切割機(jī)的三維實(shí)體模型。通過(guò)齊次坐標(biāo)變換建立了圓管-圓管和圓管-方管偏置斜交的相貫線數(shù)學(xué)模型,針對(duì)所建立的相貫線數(shù)學(xué)模型,運(yùn)用MATLAB GUI模塊進(jìn)行了編程仿真,實(shí)現(xiàn)了輸入任意相貫參數(shù),即可獲得相應(yīng)的空間相貫曲線,驗(yàn)證了數(shù)學(xué)模型的正確性,獲得了一系列相貫平面展開(kāi)曲線上的節(jié)點(diǎn),依據(jù)所取得的型值點(diǎn),采用Origin軟件分段擬合出平面展開(kāi)曲線,進(jìn)而獲得了對(duì)應(yīng)的一般二次曲線方程。一般二次曲線插補(bǔ)常用比較積分插補(bǔ)算法,比較積分法插補(bǔ)算法綜合了逐點(diǎn)比較法和DDA法的優(yōu)點(diǎn),具有插補(bǔ)精度高、操作簡(jiǎn)便和速度控制簡(jiǎn)單的特點(diǎn)。因此,本課題研究分析了比較積分插補(bǔ)算法的插補(bǔ)原理,針對(duì)直線和一般二次曲線插補(bǔ)的所有情形進(jìn)行了概括分析,求解了直線和一般二次曲線的脈沖間隔和公差,設(shè)置了數(shù)控系統(tǒng)的相貫線專用G代碼,通過(guò)可視化編程軟件VB 6.0實(shí)現(xiàn)了相貫曲線插補(bǔ)過(guò)程的動(dòng)態(tài)模擬仿真。不銹鋼管相貫線等離子切割機(jī)數(shù)控系統(tǒng)的硬件結(jié)構(gòu)采用PC機(jī)+固高運(yùn)動(dòng)控制卡實(shí)現(xiàn),數(shù)控系統(tǒng)的軟件結(jié)構(gòu)采用多任務(wù)性和并行處理的方法,應(yīng)用可視化編程軟件VB 6.0完成了不銹鋼管相貫線等離子切割機(jī)CNC系統(tǒng)的軟件程序設(shè)計(jì)。通過(guò)加載相貫線NC加工代碼,實(shí)現(xiàn)了圓管-圓管和圓管-方管相貫線的插補(bǔ)仿真。實(shí)驗(yàn)表明,研究開(kāi)發(fā)的不銹鋼管相貫線等離子切割機(jī)數(shù)控系統(tǒng)具有人機(jī)交互界面友好、可操作性強(qiáng)、適用范圍廣的特點(diǎn),為圓管-圓管和圓管-方管的相貫線加工制造奠定了理論與實(shí)踐的技術(shù)基礎(chǔ)。
[Abstract]:In practical production and life, the intersecting patterns of pipe and plate can be seen everywhere, and each type of intersecting pattern corresponds to an intersecting curve.Intersecting curve is usually a complex three-dimensional curve. The type of intersecting curve mainly depends on the shape, size and relative position of the intersecting body.In order to process the welding groove which meets the welding process requirements and realize the ideal intersecting lap of pipe or tube plate, a higher technical requirement for intersecting wire cutting is put forward.The stainless steel tube intersecting line plasma cutting machine is mainly used for the forming and cutting of stainless steel intersecting end face.In this paper, the forming mechanism of space intersecting line is studied for stainless steel pipe and round tube and square tube, and the mechanical structure of plasma cutting machine for stainless steel pipe intersecting line is determined.The accurate cutting of the intersecting line is realized by using the four-axis multi-linkage control mode, and the 3D solid model of the intersecting line plasma cutting machine is plotted by using SolidWorks software.The intersecting line mathematical model of skew intersection of circular tube-circular tube and circular tube-square tube is established by homogeneous coordinate transformation. Aiming at the mathematical model of intersecting line, the programming simulation is carried out by using MATLAB GUI module, and the arbitrary intersecting parameters are input.The corresponding spatial intersecting curve is obtained, the correctness of the mathematical model is verified, and a series of nodes on the intersecting plane expansion curve are obtained. According to the obtained type value points, the plane expansion curve is fitted by using Origin software.Then the corresponding general conic equation is obtained.The comparison integral interpolation algorithm combines the advantages of point by point comparison method and DDA method. It has the advantages of high interpolation accuracy, simple operation and simple speed control.Therefore, the interpolation principle of the comparative integral interpolation algorithm is studied and analyzed in this paper, and the pulse interval and tolerance of the straight line and the general conic curve are solved by analyzing all the cases of the interpolation of the straight line and the general conic curve.The special G code of intersecting line of NC system is set up, and the dynamic simulation of intersecting curve interpolation process is realized by visual programming software VB 6.0.The hardware structure of the NC system of the intersecting plasma cutting machine of stainless steel pipe is realized by PC solid motion control card, and the software structure of the numerical control system adopts the method of multitasking and parallel processing.The software design of CNC system of intersecting plasma cutting machine for stainless steel pipe is completed by using visual programming software VB 6.0.By loading NC machining code of intersecting line, the interpolation simulation of circular pipe and circular tube and round tube square pipe is realized.The experimental results show that the CNC system of intersecting plasma cutting machine for stainless steel pipe has the characteristics of friendly man-machine interface, strong operability and wide application range.It lays a theoretical and practical technical foundation for the intersecting manufacturing of circular pipe and tube square tube.
【學(xué)位授予單位】：山東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG659

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本文編號(hào)：1738759