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顯示后面內容 Mapping the Part 零件的測繪 Use A2 drawing paper, scale is 1 ? 1, producing the detail drawing 用 A2圖紙 , 按照 1?1 比例 , 畫出零件工作圖 . The name of the part: Bracket of grinding wheel. 零件名稱 : 砂輪頭架 Material : HT150. 材 料: 灰鑄鐵 Function: Used for supporting grinding wheel. 用 途 : 起支承砂輪頭的作用。 請 點 擊 鼠 標 左 鍵 顯 示 后 面 內 容 Methods and steps to map parts 零件測繪的方法和步驟 1) Draw the border, title block, arrange and draw the datum line. 2) Adopt appropriate presentations to draw the views. 3) Draw the border, dimension line and arrow and deepen the thick lines. 4) Measure the dimensions, fill in the dimension values, technical requirements and title block . 請 點 擊 鼠 標 左 鍵 顯 示 后 面 內 容 Methods and steps to map parts 零件測繪的方法和步驟 Draw the detail drawing. 畫正式零件圖。 Exercises 練習題 3. Map and produce the detail drawing of “ Valve body of spray appliance”. 測繪并畫出 “ 噴灑機閥體 ” 零件的零件圖。 Measuring methods for dimension 零件尺寸的測量方法 請點擊鼠標左鍵顯示后面內容 3) Measuring wall thickness Combine external calipers with a ruler (wall thickness X=AB). 測量壁厚 可用外卡鉗與直尺配合使用 , 壁厚為 X = AB。 First, one should know the part. 首先了解零件 . 1) Manufacturing defects of the part, such as sand and air holes, tool marks and wearing, should not be drawn. 零件的制造缺陷 , 如砂眼、氣孔、刀痕以及長 期使用所造成的磨損都不應畫出。 Analyzing the part 分析零件 Determining representation 確定表達方案 Drawing the sketch map 畫零件草圖 Producing the detail drawing 畫零件圖 請點擊鼠標左鍵顯示后面內容 Methods and steps to map parts 零件測繪的方法和步驟 Determine the front view and other views. 確定主視圖和其他視圖。 1) Measuring linear dimensions It can be measured directly using a ruler. Sometimes one can measure them by bining a triangular rule with a regular ruler. 測量直線尺寸 一般可用直尺直接測量 , 有時也可用三角板 與直尺配合進行測量。 對于外螺紋 ,測 大徑和螺距 。 Determine the front view and other views. 確定主視圖和其他視圖。 Project 1 噴灑機閥體