裝配圖的讀圖和拆畫零件圖ppt課件

1、 Three items should be stressed for the objectives and requirements of reading assembly drawings 讀裝配圖的目的和要求讀裝配圖的目的和要求,主要有以下三主要有以下三點(diǎn)：點(diǎn)：1. Understanding briefly 概括了解概括了解 2. Analyzing views 分析視圖分析視圖 By combining dimensioning and technical By combining dimensioning and technical requirements, further an

2、alyze the structure, requirements, further analyze the structure, transmission relations and working principles, transmission relations and working principles, create an image of the assembly structure.create an image of the assembly structure. 在以上各步驟的基礎(chǔ)上，結(jié)合尺寸標(biāo)注及技術(shù)要求等在以上各步驟的基礎(chǔ)上，結(jié)合尺寸標(biāo)注及技術(shù)要求等有關(guān)內(nèi)容，進(jìn)一步綜

3、合分析總體結(jié)構(gòu)、傳動(dòng)關(guān)系和工作原理有關(guān)內(nèi)容，進(jìn)一步綜合分析總體結(jié)構(gòu)、傳動(dòng)關(guān)系和工作原理，通過歸納總結(jié)，想象出裝配體的總體結(jié)構(gòu)形狀。，通過歸納總結(jié)，想象出裝配體的總體結(jié)構(gòu)形狀。3. Imaging the structural shape 想象結(jié)構(gòu)形狀想象結(jié)構(gòu)形狀(1) Separating the key parts 分離出關(guān)鍵零件分離出關(guān)鍵零件 (2) Determining the representation 確定其表達(dá)方案確定其表達(dá)方案Analyze what type the part belongs to分析屬哪類零件 Determine the projection direct

4、ion of the front view確定主視圖觀察方向 Determine how many views are needed (Where to use section or cut view ) 需用幾個(gè)視圖表達(dá) (何處用剖視或斷面圖)(4) Dimensioning and tolerance 標(biāo)注尺寸及公差標(biāo)注尺寸及公差 (3) Refining the structures of the parts 補(bǔ)全零件的結(jié)構(gòu)補(bǔ)全零件的結(jié)構(gòu) Refine the part drawings with what is omitted in the assembly drawing, such

5、 as chamfer, escape, and round. 補(bǔ)齊該零件在裝配圖中缺少的結(jié)構(gòu)以及省略的結(jié)構(gòu)，如：倒角、退刀槽、小圓角等。(5) Determining the surface roughness 確定表面粗糙度確定表面粗糙度 (6) Filling in the technical requirements 填寫技術(shù)要求等填寫技術(shù)要求等 (7) Check and completing the drawing 校核后加深圖線校核后加深圖線 Mark the corresponding roughness from the fitting Mark the correspond

6、ing roughness from the fitting relationship shown in the assembly drawing and based on relationship shown in the assembly drawing and based on machined surfaces, non-machined surfaces and technical machined surfaces, non-machined surfaces and technical and structural requirements. and structural req

7、uirements. 由裝配圖所示該零件與其他零由裝配圖所示該零件與其他零件的裝配關(guān)系，判斷出非加工面與加工面及其工藝結(jié)構(gòu)要求，件的裝配關(guān)系，判斷出非加工面與加工面及其工藝結(jié)構(gòu)要求，并注明相應(yīng)表面粗糙度。并注明相應(yīng)表面粗糙度。 Determine the technical requirements according to the Determine the technical requirements according to the utilization, structure and related information. utilization, structure and related information. 根據(jù)零根據(jù)零件的作用及材料、構(gòu)造，參考有關(guān)資料，擬定技術(shù)要求。件的作用及材料