【摘要】：平面切割在制造業(yè)的材料加工中占有很大的比重,隨著人口紅利的消退、制造業(yè)生產(chǎn)成本在逐年上升,倒逼一些傳統(tǒng)制造業(yè)考慮將其落后的生產(chǎn)工藝往智能化生產(chǎn)方向改造。作為板材加工中涉及的平面切割環(huán)節(jié),如何自主地對(duì)已經(jīng)確定的切割部件規(guī)劃出一條更短的切割路徑,從而降低生產(chǎn)加工時(shí)間,減少設(shè)備損耗,提升切割加工質(zhì)量等問題,此即平面切割路徑規(guī)劃與優(yōu)化問題,已然成了工業(yè)界以及學(xué)術(shù)界研究的熱點(diǎn)。本論文在總結(jié)前人工作的基礎(chǔ)上,根據(jù)平面切割圖文件的特點(diǎn),提出了平面切割圖切割路徑規(guī)劃與優(yōu)化的一些改進(jìn)算法和方案。本文的工作主要由以下幾部分組成:1)在平面切割圖數(shù)據(jù)初始化處理方面:基于DXF文件的特殊格式,提出了平面切割圖讀取與存儲(chǔ)的接口函數(shù)與數(shù)據(jù)結(jié)構(gòu);基于存儲(chǔ)的基本圖元數(shù)據(jù),提出了封閉環(huán)的識(shí)別與存儲(chǔ)算法;并提出一種適用于單批次多切割圖紙的自動(dòng)切割路徑規(guī)劃算法框架。2)在平面切割路徑規(guī)劃與優(yōu)化方面:基于切割部件的幾何特征,構(gòu)建了切割路徑的數(shù)學(xué)模型;然后提出將此種平面切割路徑轉(zhuǎn)化為動(dòng)態(tài)旅行商問題模型;提出采用禁忌貪婪算法對(duì)切割路徑空行程進(jìn)行優(yōu)化,并研究了貪婪準(zhǔn)則權(quán)重系數(shù)對(duì)空行程優(yōu)化的影響;并利用禁忌貪婪算法分別在不同模型下對(duì)同一組平面切割圖的切割路徑求解。3)在包含多重嵌套封閉環(huán)的平面切割路徑建模與優(yōu)化方面:提出了封閉環(huán)嵌套識(shí)別算法;構(gòu)建四向鏈表對(duì)包含多重嵌套封閉環(huán)的平面切割圖進(jìn)行建模;最后提出采用逐層多次調(diào)用禁忌貪婪算法(n-GR-DTSP)對(duì)此種平面切割路徑進(jìn)行求解,并給出仿真案例進(jìn)行分析說明。4)在某些平面切割中出于對(duì)切割部件的保護(hù),而提出的需要添加切割引導(dǎo)線方面:提出了板材語(yǔ)義信息判斷算法;提出了切割引導(dǎo)線自動(dòng)添加、干涉判斷、自動(dòng)調(diào)整算法。
[Abstract]:Plane cutting occupies a large proportion in the material processing of manufacturing industry. With the decline of population dividend, the production cost of manufacturing industry is rising year by year, forcing some traditional manufacturing industries to consider transforming their backward production technology to the direction of intelligent production. As a plane-cutting link involved in sheet metal processing, how to plan a shorter cutting path for certain cutting parts independently, so as to reduce production processing time, reduce equipment loss, and improve cutting quality, etc. The problem of plane cutting path planning and optimization has become a hot topic in industry and academia. On the basis of summing up the previous work and according to the characteristics of plane cutting graph file, this paper puts forward some improved algorithms and schemes for cutting path planning and optimization of plane cutting graph. The main work of this paper is composed of the following parts: (1) in the aspect of data initialization of plane cutting graph: based on the special format of DXF file, the interface function and data structure of reading and storing plane cutting graph are put forward; Based on the stored basic graph metadata, the recognition and storage algorithm of closed loop is proposed. An algorithm framework of automatic cutting path planning for single batch and multiple cutting drawings is proposed. In the aspect of plane cutting path planning and optimization, a mathematical model of cutting path is built based on the geometric characteristics of cutting parts. Then, this paper puts forward a dynamic traveling salesman problem model, proposes a Tabu greedy algorithm to optimize the path empty travel, and studies the influence of the weight coefficient of greedy criterion on the empty travel optimization. And using Tabu greedy algorithm to solve the cutting path of the same set of plane cutting graph under different models respectively. 3) in the aspect of modeling and optimization of the plane cutting path including multiple nested closed rings, a closed ring nested recognition algorithm is proposed. A four-direction list is constructed to model the planar cutting graph which contains multiple nested closed rings. Finally, a layer by layer multiple invocations Tabu greedy algorithm (n-GR-DTSP) is proposed to solve the planar cutting path. A simulation case is given to illustrate how to protect the cutting parts in some plane cutting, but the need to add the cutting guide line is put forward: the algorithm for judging the semantic information of the plate, the automatic adding of the cutting guide line are put forward. Interference judgment, automatic adjustment algorithm.
【學(xué)位授予單位】：廣東工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG48

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本文編號(hào)：2223948