機(jī)械專業(yè)畢業(yè)論文英文翻譯換檔桿殼鉆縱孔專機(jī)設(shè)計(jì)-文庫(kù)吧
2024-12-28 05:35 本頁(yè)面
【正文】 圖 5 功能元件實(shí)體的知識(shí)模板 根據(jù)分類，功能設(shè)計(jì)的知識(shí)體建立了夾具概念的功能方法：找支撐面，定位，夾緊工件。支撐面根 據(jù)加工過(guò)程的發(fā)展來(lái)定義。這一特性決定了加工工件的 整個(gè)過(guò)程中，設(shè)計(jì)過(guò)程都要基于加工過(guò)程。從此意義上看，知識(shí)體的共享會(huì)因定位面，定位點(diǎn)，方位，夾具的夾緊和功能元件的選擇而受到限制。但由于功能元件可用于夾具設(shè)計(jì)過(guò)程中 的 多范疇領(lǐng)域，所以也可用于其它應(yīng)用軟件中。圖 5 是將功能元件的知識(shí)模板用于夾具設(shè)計(jì)過(guò)程的例子。 樣圖設(shè)計(jì)和功能設(shè)計(jì)相似。樣圖設(shè)計(jì)是在功能設(shè)計(jì)的基礎(chǔ)上加入了相應(yīng)的功能和商業(yè)元素。為此，我們運(yùn)用結(jié)構(gòu)，關(guān)聯(lián)和實(shí)體來(lái)定義了下列種類，基體，支撐，定位，夾緊和輔助元件。 表 2 夾具設(shè)計(jì)的初始信 息 信息 特性 初始幾何學(xué) 最終幾何學(xué) 加工操作 端面銑削 邊 銑 鉆 削 加工資源 立式銑床 夾具資源 標(biāo)準(zhǔn) 夾具單元 5．知識(shí)模型的應(yīng)用 以下兩部分描述了加工和檢測(cè)夾具設(shè)計(jì)中知識(shí)模型的應(yīng)用。根據(jù)其使用潛能，這些模型分為不同的兩類。 第 3 部分中關(guān)于結(jié)構(gòu)模型的闡述，是基于構(gòu)成這些模型知識(shí)體的實(shí)例特性。為此，包括初始及最終幾何學(xué)的描述，加工工藝圖，機(jī)床和夾具資源在內(nèi)的初始信息都應(yīng)用于知識(shí)模型中。表 2就列出了應(yīng)用于其中的初始信息。 【 附 】英文原文 翻譯題名 ： Knowledge model as an integral way to reuse the knowledge for fixture design process 期刊與作者 ： R. Hunter Journal of Materials Processing Technology 128（ 2022）718： 1510— 1515 出版社 ： Elsevier Science . Abstract The fixture design is considered a plex process that demands the knowledge of different areas, such as geometry, tolerances, dimensions, processes and manufacturing resources. Nowadays, the fixture design process is oriented to automated systems based on knowledge models. These models describe the characteristics and relationships of the physical elements together withthe inference processes that allow carrying out the activity of fixture design. With the employment of the knowledge models, besides the automation, it ispossible to systematize and structure the knowledge of the fixture design process. With the use of specific methodologies, as the knowledge template, it ispossible to reuse the knowledge represented in a model, for its use in a different design process. The knowledge template represents a pattern that defines the mon entities and inference processes to use in the design process .In this work, with the use of knowledge template we propose the reuse of the knowledge described in the design process of fixtures for machining to other types of fixtures uses like inspection, assembly or welding. 169。 2022 Elsevier . All rights reserved. Keywords: Knowledge model。 Knowledge template。 Fixture design 1. Introduction The continuous challenge that involves the knowledge representation hasoriented to many different research groups to develop methodologies that describe stages for capture and representation of the knowledge in design and manufacturing systems [1–3]. This has allowed to define knowledge models as a tool that helps us to clarify the structure of intensive knowledge and informationprocessing tasks. In this sense, a knowledge model provides a specification of the data and inference processes required by the system of study [4]. A first approach in the development of knowledge models applied to machining fixtures design process has been proposed by Hunter [5]. During the last decade, the use of modelling techniques has allowed usto represent the fixture design process employed in some manufacturing operations, such as machining, assembly and inspection, etc. [6]. Due to the plexity and the wide scope of the fixture design process, different research groups have been focused in the analysis of specific activities of this process,such as fixture configuration, tolerance analyses, stability and accessibility. A great number of investigations has taken in consideration the way inwhich represent the knowledge used in the fixture design process. These researches are focused in the documentation of the design parameters, the structuring of the information of the fixture and the description of the fixture elements used in fixture design [2,7]. On the other hand, the implementation of the
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