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83。25252527272828 結(jié)論29致謝30參考文獻(xiàn)31 摘 要本文主要介紹了支承座工藝工裝的設(shè)計(jì),全文共分為工藝部分和工裝部分這兩大部分來(lái)闡述所設(shè)計(jì)的支承座的設(shè)計(jì)方法和工作原理。工藝部分主要是對(duì)零件的材料性能、形狀及尺寸和工藝性的分析,從而確定毛坯類型和制造方法,按照所確定的毛坯尺寸和公差來(lái)確定機(jī)械加工工藝規(guī)程。在工藝設(shè)計(jì)過(guò)程中,最大的難點(diǎn)是定位基準(zhǔn)的選擇和機(jī)械加工工藝路線的確定。通過(guò)確定機(jī)械加工工序余量、工序尺寸及表面粗糙度來(lái)選擇機(jī)械加工設(shè)備及工藝裝備。工裝部分主要介紹了支承座專用夾具的設(shè)計(jì),在確定夾具總體設(shè)計(jì)方案時(shí),支承座專用夾具能否完成好工件的定位和夾緊達(dá)到所要求的技術(shù)要求顯得尤為重要。在確定定位方案、定位原件、夾緊方案、夾緊原件的時(shí)候,應(yīng)綜合考慮相關(guān)的影響因素和原則,從而完善夾具的設(shè)計(jì)。其中在確定夾緊力大小的時(shí)候,應(yīng)首先考慮夾緊力的方向和作用點(diǎn)。應(yīng)保證夾具夾緊力和軸向力方向一致,為防止工件在加工過(guò)程中產(chǎn)生振動(dòng)和轉(zhuǎn)動(dòng),采用鉤形壓板夾具夾緊工件,以防止工件轉(zhuǎn)動(dòng),在設(shè)計(jì)過(guò)程中應(yīng)當(dāng)考慮到側(cè)壁的定位和剛性能否達(dá)到技術(shù)要,并采用適當(dāng)?shù)姆绞絹?lái)解決這個(gè)問(wèn)題。 關(guān)鍵詞:工藝,夾具,定位,毛坯 AbstractThis paper mainly introduces the design of Bearing block technics and frock. The whole text is divided into technics part and frock part, which is to expound the design methods and working principle of the designed Bearing block. Technics part mainly analyzes on the material properties, shape, size and technical capability. And then make sure the roughcast types and manufacturing methods, in accordance with the defined dimensions and tolerances to determine a point of order for machining process. In the process of technics design, the biggest difficulty are the selection for orientation benchmark and the confirmation on the route of processing technics. By confirming the margin and size of working procedure and surface roughness, people select mechanical processing facility and technics equipment. Frock part mainly introduces the design of special clamp for Bearing block. In the process of confirming the rough design scheme of clamp, it is particularly important whether the special clamp can achive good positioning and clamping the workpiece to the required technical requirements. When determining the orientation program, positioning material, clamping program and clamping material, people should consider the impact of relevant factors and principles, consequently improving the design of clamp. In the process of determining the clamping force, people should consider the direction of clamping force and the acting point first. Should ensure that fixture clamping force and the axial force direction, in order to prevent the workpiece during processing produce vibration and rotation, the Hook clamp to preventing the workpiece rotation, during the design process should take into account the wall positioning and rigidity to achieve technology and adopt an appropriate way to solve this problem.Key Words: technics,clamp,orientation,roughcast緒 論畢業(yè)設(shè)計(jì)是我們對(duì)大學(xué)所學(xué)各課程的一次綜合性的總復(fù)習(xí),同時(shí)也是一次理論聯(lián)系實(shí)踐的訓(xùn)練。通過(guò)大學(xué)的學(xué)習(xí)是實(shí)踐,我希望能在這次畢業(yè)設(shè)計(jì)能體現(xiàn)出所學(xué)所想;還能學(xué)習(xí)到更多更廣的知識(shí),鍛煉自己獨(dú)立分析問(wèn)題解決問(wèn)題的能力。零件的工藝部分主要是通過(guò)對(duì)零件的材料,尺寸及形狀分析來(lái)選擇毛坯,從而來(lái)制定機(jī)械加工工藝規(guī)程。零件在工藝規(guī)程之后,就要按工藝規(guī)程順序進(jìn)行加工。在加工中除了需要機(jī)床、刀具、量具之外,成批生產(chǎn)時(shí)還要用機(jī)床夾具。它們是機(jī)床和工件之間的連接裝置,使工件相對(duì)于機(jī)床獲得正確的位置。機(jī)床夾具的好壞將直接影響工件加工表面的位置精度。通常把確定工件在機(jī)床上或夾具中占有正確位置的過(guò)程,稱為定位。當(dāng)工件定位后,為了避免在加工中受到切削力、重力等的作用而破壞定位,還應(yīng)該用一定的機(jī)構(gòu)或裝置將工件加以固定。使工件在加工過(guò)程中保持定位位置不變的操作,稱為夾緊。將工件定位、夾緊的過(guò)程稱為裝夾。工件裝夾是否正確、迅速、方便和可靠,將直接影響工件的加工質(zhì)量、生產(chǎn)效率、制造成本和操作安全。機(jī)床夾具在生產(chǎn)中應(yīng)用十分廣泛。 機(jī)床夾具的作用可歸納為以下幾個(gè)方面:保證加工精度、提高生產(chǎn)效率、減少勞動(dòng)強(qiáng)度 。機(jī)床夾具應(yīng)滿足的基本要求包括以下幾方面:保證加工精度、夾具的總體方案應(yīng)與年生產(chǎn)綱領(lǐng)相適應(yīng)、安全,方便,減輕勞動(dòng)強(qiáng)度、排屑順暢、夾具應(yīng)有良好的強(qiáng)度,剛度和結(jié)構(gòu)工藝性。1 工藝工裝設(shè)計(jì)任務(wù)支承座的工藝工裝設(shè)計(jì)可以培養(yǎng)學(xué)生正確的設(shè)計(jì)思想方法、嚴(yán)謹(jǐn)?shù)目茖W(xué)態(tài)度和良好的工作作風(fēng),樹立自信心;培養(yǎng)學(xué)生運(yùn)用所學(xué)的理論知識(shí)和技能解決實(shí)際問(wèn)題的能力及素質(zhì);培養(yǎng)學(xué)生獲取信息和綜合處理信息的能力,提高文字和語(yǔ)言表達(dá)能力。安排加工工藝,安排工藝流程,并設(shè)計(jì)夾具。首先進(jìn)行有關(guān)資料的查詢,零件圖分析,填寫工藝卡片,進(jìn)行夾具的設(shè)計(jì),了解設(shè)計(jì)的任務(wù),熟練應(yīng)用機(jī)械設(shè)計(jì)制造基礎(chǔ)知識(shí)和電腦繪圖軟件。本課題要求學(xué)生應(yīng)在校外短期調(diào)研的基礎(chǔ)上,在老師的指導(dǎo)下在校內(nèi)獨(dú)立完成,學(xué)生最終完成:計(jì)算機(jī)打印的設(shè)計(jì)圖紙總量A0四張以上、。2 零件的技術(shù)要求分析題目所給的零件為支承座,主要用于連接軸類零件的作用。故材料選用HT200 ,屬于鑄鐵,%的鐵碳合金,力學(xué)性能比鋼差。但具有優(yōu)良的鑄造性、減震性、耐磨性等特點(diǎn),加之價(jià)格低廉,生產(chǎn)設(shè)備和工藝簡(jiǎn)單,其優(yōu)勢(shì)是鑄造性能優(yōu)異,最適合作為大