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ca6140車(chē)床后托架加工工藝及夾具設(shè)計(jì)機(jī)械說(shuō)明書(shū)-全文預(yù)覽

  

【正文】 三個(gè)加工階段: ① 粗加工階段 粗加工的目的是切去絕大部分多雨的金屬,為以后的精加工創(chuàng)造較好的條件,并為半精加工,精加工提供定位基準(zhǔn),粗加工時(shí)能及早發(fā)現(xiàn)毛坯的缺陷,予以報(bào)廢或修補(bǔ),以免浪費(fèi)工時(shí)。 ② 所選加工方法能確保加工面的幾何形狀精度,表面相互位置精度要求。 雖然毛坯 的形狀尺寸與零件接近,可以減少加工余量,提高材料的利用率,降低加工成本,但這樣可能導(dǎo)致毛坯制造困難,需要采用昂貴的毛坯制造設(shè)備,增加毛坯的制造成本。 ② 工藝基準(zhǔn) 以設(shè)計(jì)基準(zhǔn)相一致。 ③ 鑄件結(jié)構(gòu)要盡量簡(jiǎn)化, 并要有和合理的起模斜度,以減少分型面、 芯子、并便于起模。 毛坯的熱處理 灰鑄鐵( HT150)中的碳全部或大部分 以片狀石墨 方式存在鑄鐵 中,由于片狀石墨對(duì)基體的 割裂作用大 ,引起應(yīng)力集中也大 ;因此,使石墨片得到細(xì)化, 并改善石墨片的分布,可提高鑄鐵的性能 。 ③ mm202 ?? 、 mm132 ?? 粗糙度為 50?Rz ; mm202 ?? 為錐孔,且粗糙度為 umRa ? 。具體特點(diǎn) 和技術(shù)要求 如下: ① 精加工孔 ?? , ?? , ?? 要求達(dá)到的 精度等級(jí) 為 8~7 ITIT 。雖然這些方案都可以加工出來(lái)合格的零件,但從生產(chǎn)效率和經(jīng)濟(jì)效益來(lái)看,可能其中有種方案比較合理且切實(shí)可行。 關(guān)鍵詞 產(chǎn)品設(shè)計(jì) , 后托架 , 加工工藝 , 夾具 攀枝花學(xué)院本科畢業(yè)設(shè)計(jì)(論文) ABSTRACT II ABSTRACT He machinefinishing craft realizes the product design, guaranteed the product quality, saves the energy, reduces the consumption the important method. After this topic studies the CA6140 lathe the bracket processing technological process. First through to the detail drawing analysis, understood the work piece the structural style, has been clear about the concrete specification, thus to work piece each position surface choice appropriate processing method. Again drafts the more reasonable technological process, fully manifests the quality, the productivity and the efficient unification . Engine bed jig design is in a craft equipment design important constituent, in the entire machinefinishing process, the jig except clamps, fixes is processed outside the ponents, but also requests guarantee processing ponents position precision, enhancement processing productivity . This topic in the middle of the design process, perates the production reality, conducts the investigation and study, absorbs the domestic and foreign advanced technologies, formulates the reasonable design proposal, is carrying on the concrete design . Keywords shift the product design, latter bracket , processing craft, jig 攀枝花學(xué)院本科畢業(yè)設(shè)計(jì)(論文) 目 錄 1 目 錄 摘 要 ?????????????????????????????????? Ⅰ ABSTRACT?????? ?????????????????????????? Ⅱ 第一章 CA6140 車(chē)床后托架的加工工藝設(shè)計(jì) ............................................................ 3 1. CA6140車(chē)床后托架的結(jié)構(gòu)特點(diǎn)和技術(shù)要求 ........................................................... 3 2. CA6140車(chē)床后托架的材料、毛坯和熱處理 ........................................................... 3 毛坯材料及熱處理 ....................................................................................... 3 毛坯的結(jié)構(gòu)確定 .......................................................................................... 4 3.工藝過(guò)程設(shè)計(jì)中應(yīng)考慮的主要問(wèn)題 ....................................................................... 4 加工方法選擇的原則 ................................................................................... 4 加工階段的劃分 .......................................................................................... 4 工序的合理組合 .......................................................................................... 5 加工順序的安排 .......................................................................................... 5 4. CA6140車(chē)床后托架的機(jī)械加工工藝過(guò)程分析 ........................................................ 6 CA6140車(chē)床后托架零件圖分析 .................................................................... 6 CA6140車(chē)床后托架的加工工藝的路線 .......................................................... 7 5. CA6140車(chē)床后托架的工序設(shè)計(jì) ........................................................................... 12 工序基準(zhǔn)的選擇 ........................................................................................ 12 工序尺寸的確定 ........................................................................................ 12 加工余量的確定 ........................................................................................ 14 確定各工序的加工設(shè)備和工藝裝備 ............................................................ 15 確定切削用量及工時(shí)定額 .......................................................................... 16 第二章 專用夾具設(shè)計(jì) ............................................................................................... 26 1.銑平面夾具設(shè)計(jì) ................................................................................................. 26 研究原始質(zhì)料 ............................................................................................ 26 定位基準(zhǔn)的選擇 ........................................................................................ 26 切削力及夾緊分析計(jì)算 .............................................................................. 26 誤差分析與計(jì)算 ........................................................................................ 27 夾具設(shè)計(jì)及操作的簡(jiǎn)要說(shuō)明 ....................................................................... 28 2.鉆三杠孔夾具設(shè)計(jì) ............................................................................................. 28 研究原始質(zhì)料 ............................................................................................ 28 定位基準(zhǔn)的選擇 ........................................................................................ 29 切削力及夾緊力的計(jì)算 .............................................................................. 29 誤差分析與計(jì)算 ........................................................................................ 30 夾具設(shè)計(jì)及操作的簡(jiǎn)要說(shuō)明 ....................................................................... 31 3. 鉆底孔夾具設(shè)計(jì) ................................................................................................. 31 研究原始質(zhì)料 ............................................................................................ 31 定位基準(zhǔn)的選擇 ........................................................................................ 31 切削力及夾緊力的計(jì)算 .............................................................................. 31 誤差分析與計(jì)算 ........................................................................................ 32 夾具設(shè)計(jì)及操作的簡(jiǎn)要說(shuō)明 ..........................................
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