【正文】
加 工誤差,稱為 定位誤差△ D。 基準(zhǔn)位移誤差△ Y是一批工件逐個(gè)在夾具上定位時(shí),定位基準(zhǔn)相對(duì)于限位基準(zhǔn)的最大變化范圍δ i在加工尺寸方向上的投影。 由于 C面既是工序基準(zhǔn),又是定位基準(zhǔn),基準(zhǔn)不重合誤差 △ B 為零。 2)夾具誤差△ J 因夾具上定位元件、對(duì)刀或?qū)蛟?、分度裝置及安裝基準(zhǔn)之間的位置不精確而造成的加工誤差,稱為 夾具誤差△ J。 的公差 ,以及限位基面相對(duì)于安裝基面 D、 C的平行度和垂直度誤差 (兩者公差兼容)。 △ A = X1max + X2max 式中 X1max—— 過(guò)渡盤與主軸間的最大配合間隙; X2max—— 過(guò)渡盤與夾具體間的最大配合間隙。 車床夾具的加工方法誤差,如車床主軸上安裝夾具基準(zhǔn)(圓柱面軸線、圓錐面軸線或圓錐孔軸線)與主軸回轉(zhuǎn)軸 線間的誤差、主軸的徑向跳動(dòng)、車床溜板進(jìn)給方向與主軸軸線的平行度或垂直度等。因此保證工件加工精度的條件是 河南機(jī)電高等??茖W(xué)校畢業(yè)設(shè)計(jì) ∑△ =(△ D+△ J +△ A +△ G) ≤δ K 既工件的總加工誤差 ∑△ 應(yīng)不大于工件的加工尺寸公差 δ K。 圖 12夾具的總加工誤差為 ∑△ =(△ 2D+△ 2J +△ 2A +△ 2G) =( 0+++++) = 精度儲(chǔ)備 JC=( ) mm= 第三章 虛擬造型設(shè)計(jì)及裝配 3. 1 過(guò)渡盤的三維造型 設(shè)計(jì) 。 ( 3)系統(tǒng)提示→ 選取或創(chuàng)建一個(gè)草繪平面 ,選取標(biāo)準(zhǔn)基準(zhǔn)平面 FRONT 作為草繪平面。 河南機(jī)電高等??茖W(xué)校畢業(yè)設(shè)計(jì) ( 6)單擊模型對(duì)話框下部的 確定 按鈕,生成實(shí)體特征。在(方向)菜單中選?。ㄕ颍┻x項(xiàng),在(草繪視圖)菜單中選?。ㄈ笔。┻x項(xiàng)。 ( 5)單擊模型對(duì)話框上的 確定 按鈕,成功完成切減拉伸實(shí)體特征的增加。 ( 2)在(菜單管理器)中依次選取(零件) /(特征) /(創(chuàng)建) /(實(shí)體) /(加材料)選項(xiàng),在(實(shí)體選項(xiàng))菜單中選?。ㄐD(zhuǎn))和(實(shí)體)選項(xiàng),然后選取(完成)選項(xiàng)。 ( 4)選取系統(tǒng)缺省放置參照和尺寸參照后,進(jìn)入草繪模式,使用樣條曲線工具繪制草繪剖面,草繪一個(gè)長(zhǎng)寬分別為 90, 5的矩形,完成后退出草繪模式。 ( 1)在(菜單管理器)中依次選?。慵?/(特征) /(創(chuàng)建) /(倒角)選項(xiàng),在(倒角)菜單中選?。ㄟ叄┻x項(xiàng),然 后在(布置)菜單中選?。▕A角 x d)選項(xiàng)。 ( 3)單擊模型對(duì)話框上的 確定 按鈕,成功完成對(duì)圓柱體的倒角。 ( 2)系統(tǒng)提示→ 選 取或創(chuàng)建一個(gè)草繪平面 ,選取標(biāo)準(zhǔn)基準(zhǔn)平面 RIGHT 作為草繪平面。系統(tǒng)提示輸入深度值 ,輸入“ ”,并確定。在(屬性)菜單中選取(雙側(cè))選項(xiàng),然后選?。ㄍ瓿桑┻x項(xiàng)。 ( 4)在(指定到)菜單中選?。ù┻^(guò)所有)選項(xiàng),然后選?。ㄍ瓿桑┻x項(xiàng)。 ( 2)在草繪平面內(nèi)繪制草繪剖面,完成后退出草繪模式。 ( 1)在(菜單管理器)中依次選?。慵?/(特征) /(創(chuàng)建) /(實(shí)體) /(孔)選項(xiàng)。在(孔放置)分組框中的(放置 類型)下拉框中選?。ň€性)。 河南機(jī)電高等??茖W(xué)校畢業(yè)設(shè)計(jì) ( 5)單擊(孔)對(duì)話框下部的 確定 按鈕,生成圓孔特征 1。 ( 1)在菜單欄選?。ㄎ募?/(新建)選項(xiàng),新建文件 prt0003。在(方向 )菜單中選?。ㄕ颍┻x項(xiàng),在(草繪視圖)菜單中選取(缺?。┻x項(xiàng)。 。 ( 3)選取系統(tǒng)缺省放置參照和尺寸參照后,進(jìn)入草繪模式,使用樣條曲線工具繪制草繪剖面,草繪一個(gè)長(zhǎng)和寬分別為 145, 25的矩形,完成后退出草繪模式。 。在(方向)菜單中選?。ㄕ颍┻x項(xiàng),在(草繪視圖)菜單中選?。ㄈ笔。┻x項(xiàng)。特征的增加。在(倒圓角類型)菜單選?。ê?jiǎn)單)選項(xiàng),然后選取(完成)選項(xiàng);在(倒圓角組屬性)菜單中選?。ǔ?shù))和(邊鏈),然后選?。ㄍ瓿桑┻x項(xiàng);在鏈菜單中選?。ㄏ嗲墟湥┻x項(xiàng)。 。在(孔放置類型)中選?。ň€性)選項(xiàng)。在(深度二)下拉框中,選?。o(wú))選項(xiàng)。 ( 1)插入新的基準(zhǔn)平面作為草繪平面。 ( 2)在(菜單管理器)中依次選取(零件) /(特征) /(創(chuàng)建) /(筋)選項(xiàng),系統(tǒng)提示 選取或創(chuàng)建一個(gè)草繪平面 ,選取基準(zhǔn)平面 DMT2 作為草繪平面。 。 本來(lái)的我對(duì) pro/e 并不太了解,現(xiàn)在卻已經(jīng)非常的熟悉了,非常感謝老師們的培養(yǎng),還有同學(xué)們的 幫助,讓我受益匪淺,以后還要多加努力,把其他的學(xué)習(xí)軟件也要學(xué)好 ,在以后還要好好的學(xué)習(xí),增加自己的專業(yè)知識(shí),自己的大腦,一步一步的強(qiáng)大 自己。 ( 4)《機(jī)械制造工藝學(xué)》 機(jī)械工業(yè)出版社, 1991。 ( 8)《機(jī)械設(shè)計(jì)課程設(shè)計(jì)》鞏云鵬、田萬(wàn)祿、張祖立、黃秋波編,東北大學(xué)出版社 2021。 ( 12) 《機(jī)械原理》鄒慧君主編,高等教育出版社。t charge you more than 35% of your pensation if you win the case. If you are thinking about signing up for a damagesbased agreement, you should make sure you39。s Premier League match at Chelsea on Sunday. I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport. For me it39。s actions. CSKA said they were surprised and disappointed by Toure39??傆X(jué)得自己自己似乎應(yīng)該去做點(diǎn)什么,或者寫點(diǎn)什么。t really grow up, it seems is not so important。 Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time. 原來(lái),這個(gè)世界上,對(duì)某個(gè)事件能產(chǎn)生化學(xué)反應(yīng)的,除了非做不可的堅(jiān)決,還有,時(shí)間。也曾經(jīng)好像已經(jīng)下定了決心去做某件事,但更多的時(shí)候是最后又打起了退堂鼓。 Those were broken into various shapes of stationery。突然想到那件藍(lán)格子襯衫;那些被折成各種各樣形狀的信紙;那段從街角深巷伊始的友誼;還有那場(chǎng)還沒(méi)有開(kāi)始就宣告了終結(jié)的邂逅計(jì)劃 …… 那些年那些天的非做不 可,終于和青春一樣,都將在我們的人生中謝幕。t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters). cause there 。ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。那些曾 經(jīng)所謂的非做不可,只是青蔥年華里自己給自己注射的一支強(qiáng)心劑,或者說(shuō),是自以為是的精神寄托罷了。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個(gè)人的時(shí)候,自己的想法總是特別地清晰。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat 河南機(jī)電高等??茖W(xué)校畢業(yè)設(shè)計(jì) 4 profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。 The end of our life, and can meet many things really do? 而窮盡我們的一生,又能遇到多少事情是 真正地非做不可? During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開(kāi)頭的年齡已經(jīng)到了尾聲。s 21 win. Michel Platini, president of European football39。s antiracism taskforce, is in London for the Football Association39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissa