【正文】 ure=H) (2) IF (Part Level=not SmallAssembly) (Connection Type=0) (Direction of Assembly Base Part=not Connection Direction) (PartFrom=not Assembly Base Part) (PartTo=not Assembly Base Part) THEN (Welding Posture=V) . 焊接方法的確定 按規(guī)則根據(jù)焊接 位置 此模數(shù)決定焊接方法。 . 決定焊接 位置 的第二組類水平 在第二組類水平 , 決定焊接 位置 的情況同小部件水平是一樣的。用于此規(guī)則焊接接 頭的連接類型是：對(duì)接式（ 0）和 T類型（ 1）。第一個(gè)組是小部件水平；第二組由中間部件組成，為單元塊組裝和最后的分組裝配作業(yè)水平。 被認(rèn)為是基體的部分被當(dāng)做 partfrom而連接到基體的部分被當(dāng)做 PartTo。 這篇論文考慮了四種焊接 位置 :向下焊接，水平焊接，垂直焊接和仰焊接， 如圖２所示 。這個(gè)系統(tǒng)的框架將在圖 1中展示。這篇論文涉及船舶建造分組裝配作業(yè)的自動(dòng)焊接操作計(jì)劃系統(tǒng)的研制。焊接操作規(guī)劃問題在裝配過程中是很難解決的，因?yàn)椴考拇笮?, 類型 ,以及組成的取決于船的類型的亞部件是不同。 關(guān)鍵詞： 分組裝配作業(yè)；專家系統(tǒng)；操作計(jì)劃；焊接過程 ⒈ 簡(jiǎn) 介 船舶建造 是傳統(tǒng)的勞動(dòng)強(qiáng)度大的組裝工業(yè)，焊接是 其 基本生產(chǎn)技術(shù)。 因?yàn)閴K由若干鋼板塊和型鋼同預(yù)定形狀按照船舶設(shè)計(jì)組成的，所以對(duì)船舶建造來說焊接操作計(jì)劃構(gòu)造塊是一項(xiàng)關(guān)鍵任務(wù)，但是這個(gè)是以傳統(tǒng)經(jīng)驗(yàn)為基礎(chǔ)的 ，因此，有必要研制一種自動(dòng)焊接操作計(jì)劃系統(tǒng)來組裝塊。 the second group consists of the intermediate subassembly, the unit block assembly, and the final block assembly levels. The reason for this grouping is that there is no turnover process in the small subassembly level, but the assembly levels belonging to the second group may have turnover processes. Turnover processes cause the change of welding postures that are determined before the turnover process. . Determining welding postures in the first group level The following are examples of rules to determine the welding posture for a small subassembly level. The connection types of welding joints between two parts used in this rule are: Butt type (0) and T type (1). (1) IF (Part Level=Small Assembly) (Connection Type=1) (Direction of Assembly Base=Connection Direction) (PartFrom=not Assembly Base Part) (PartTo=not Assembly Base Part) THEN (Welding Posture=H) (2) IF (Part Level=Small Assembly) (Connection Type=1) (Direction of Assembly Base Part=not Connection Direction) (PartFrom=not Assembly Base Part) (PartTo=not Assembly Base Part) THEN (Welding Posture=V) An example of a small subassembly is shown in Fig. 4. In this case, there are 222。出處： International Journal of Production Economics, 1999, 60: 203209. An automated welding operation planning system for block assembly in shipbuilding KyuKab Cho*, JungGuy Sun, JungSoo Oh Abstract The block assembly process is one of the most important manufacturing processes for shipbuilding. Since block is posed of several steel plates and steel sections with predetermined shapes according to ship design, the welding operation planning to construct a block is a critical activity for shipbuilding, but this activity has traditionally been experience based. Thus, it is required to develop an automated welding operation planning system to assemble blocks. This paper describes the development of an automated welding operation planning system for block assembly in shipbuilding. Based on the information about parts, topological relationship between parts and assembly sequences for block, the developed system performs the determination of welding postures, welding methods, welding equipment and welding materials. The developed system implemented successfully for real blocks constructed in shipyard. Keywords: Block assembly。 Welding process 1. Introduction Shipbuilding is traditionally a laborintensive assembly industry that employs the welding process as a basic production technology. In shipbuilding, there are several types of manufacturing process planning for cutting and bending, assembly, out fitting, and erection. Among these process planning activities, the assembly process planning is by far the most important, since the construction process for a hull block prises approximately 48~50% of the total shipbuilding process [1,2]. The main operation for block assembly is the welding operation. T