【正文】 為主要加工的表面，有底面的銑加工，其導(dǎo)軌面的粗糙度要求是 ?Ra ⑵ ． 以側(cè)面為加工的表面，有側(cè)面的銑加工，其端面的粗糙度要求是?Ra ⑶ ． 以半圓孔為加工的 表面，有半圓孔的精鏜加工，其半圓孔的粗糙度要求是 ?Ra ⑷ ． 以底面通孔為加工的表面，有通孔的鉆加工，其通孔的粗糙度要求是 ?Ra 軸承蓋毛坯的選擇金屬行澆鑄，因為生產(chǎn)率很高，所以可以免去每次造型。 西安航空職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計論文 其加工有幾組加工。設(shè)計者要考慮加工工藝問題。 一個好的結(jié)構(gòu)不但要應(yīng)該達到設(shè)計要求，而且要有好的機械加工工藝性，也就是要有加工的可能性，要便于加工，要能 夠保證加工質(zhì)量，同時使加工的勞動量最小。 零件 的實際形狀如上圖所示， 從零件圖上看，該零件是 軸承蓋類 典型的零件，結(jié)構(gòu)比較 典型。 關(guān)鍵詞 ： 軸承蓋 定位孔 Abstract: bearing cap Positioning hole Key words: Bearing cover is an important part, because of its smaller ponents, structure, shape is not very plex, but two holes require a higher precision, in addition to both sides request processing, but accuracy is not very high. Positioning accuracy of hole size, geometry and mutual location precision accuracy, as well as the surface quality of the surface will affect the quality of a machine or assembly of ponents, thereby affecting their performance and working life, thus positioning holes of the processing is very critical and important. 西安航空職業(yè)技術(shù)學(xué)院 畢業(yè)設(shè)計論文 目 錄 1 零件圖工藝性分析 ......................................................................................................................................8 零件結(jié)構(gòu)功用分析 ..............................................................................................................................8 零件技術(shù)條件分析 ..............................................................................................................................8 零件結(jié)構(gòu)工藝性分析 ..........................................................................................................................8 .....................................................................................................................................................9 毛坯類型 ...............................................................................................................................................9 毛坯余量確定 ................................................................................................................................... 10 毛坯技術(shù)要求 ................................................................................................................................... 12 3．機加工工藝路線確定 ........................................................................................................................... 12 加工方法分析確定 ........................................................................................................................... 12 加工順序的安排 ............................................................................................................................... 13 定位基準(zhǔn)選擇 ................................................................................................................................... 13 加工階段的劃分說明 ....................................................................................................................... 15 主要機加工工序簡圖 ....................................................................................................................... 16 ......................................................................................................................... 16 ......................................................................................................................... 17 ..................................................................................................................... 19 .................................................................................................................................................. 25 ........................................................................................................................... 25 ..........