【正文】 ............................................ 6 零件的技術(shù)要求 ....................................................................................................................... 6 2．零件的工藝分析 ................................................................................................................. 6 第二部分 確定零件毛坯 ................................................................................................................. 7 1．毛坯種類的選擇： ............................................................................................................. 7 2. 毛坯余量確定 ..................................................................................................................... 7 第三部分 工藝路線的制定 ............................................................................................................. 8 基準的選擇 ......................................................................................................................... 8 2．各個表面加工方法的選擇 ................................................................................................. 8 3. 加工順序的安排 ................................................................................................................. 9 加工階段的劃分 ....................................................................................................................... 9 工序集中與分散 ..................................................................................................................... 10 4．工序順序的安排 ............................................................................................................... 10 (1) 機械加工工序 .......................................................................................................... 10 (2)熱處理工序及表面處理工序的安排 ....................................................................... 10 (3)輔助工序安排 ........................................................................................................... 11 （ 4） . 詳細工藝過程的制定，參考教材 P261 中的表 613。28 鄭州電力職業(yè)技術(shù)學院 畢 業(yè) 設(shè) 計 設(shè)計題目 : 杠桿的加工工藝及專用卡規(guī)的設(shè)計 系 別 : 機電工程系 專 業(yè) : 數(shù)控技術(shù) 班 級 : 數(shù)控二班 姓 名 : 學 號 : 指導(dǎo)教師 : 景紅芹 28 設(shè)計任務(wù)書 設(shè)計題目：杠桿的加工工藝及專用卡規(guī)的設(shè)計 畢 業(yè)設(shè)計的內(nèi)容及要求： 畢業(yè)設(shè)計內(nèi)容、順序 和 要求 2. 摘要 ： 1） .闡明設(shè)計機械加工工藝規(guī)程的目的、意義和預(yù)期效果。一個好的夾具是將這些問題很好的協(xié)調(diào)好的一個統(tǒng)一整體，在此次的夾具設(shè)計也正是向著這個目標靠近。毛坯尺寸通過確定加工余量后再決定。 4. 詳細工藝過程的制定，參考教材 P261 中的表 613。s about how he felt and I would like to speak to him first to find out what his experience was. Uefa has opened disciplinary proceedings against CSKA for the racist behaviour of their fans during City39。 A person39。下面六個方法有助于你更完滿透徹地敞開心扉。s not needed. Instead, he plans to deploy his 270squarefoot (25squaremeter) main chute at an altitude of around 5,000 feet (1,524 meters). In order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). He will have a reserve parachute that will open automatically if he loses consciousness at mach speeds. Even if everything goes as planned, it won39。 Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. We often close ourselves off when traumatic events happen in our lives。 Then in high school, think don39。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Cay man Islandsbased Webb, the Watch m head of Fifa39。該杠桿的生產(chǎn)類型為中批生產(chǎn)，可以采用萬用型機床配以專用工、夾具，以提高生產(chǎn)率；而且運用工序集中原則使工件的裝夾次數(shù)少，不但可縮短輔助時間，而且由于在一次裝夾中加工了許多表面，有利于保證各加工表面之間的相對位置精度要求。由此可見，該零件的工藝性較好。同時，好的夾具設(shè)計可以提高產(chǎn)品勞動生產(chǎn)率，保證和提高加工精度，降