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畢業(yè)論文-連桿工藝及連桿大頭螺栓底孔氣動鉆夾具設(shè)計(已修改)

2025-01-28 22:33 本頁面
 

【正文】 學(xué)號 : 202222022345 班級 : 082212H 本科畢業(yè)論文 連桿工藝及連桿大頭螺栓底孔氣動鉆夾具設(shè)計 院(系)名 稱: 專 業(yè) 名 稱 :機(jī)械設(shè)計制造及其自動化 (機(jī)制 ) 指 導(dǎo) 教 師 : 學(xué) 生 姓 名 : 二○一二年五月 BACHELOR39。S DEGREE THESIS OF DONGHUW COLLEGE WUHAN UNIVERSITY Rod Production Process and Drill bolt hole special jig design College: College of Engineering and Technology Subject: Mechanical Design and Manufacture and Automation Name: Directed by : May 2022 摘 要 連桿是柴油機(jī)的主要傳動件之一,本文主要論述了連桿的加工工藝及其夾具設(shè)計。連桿的尺寸精度、形狀精度以及位置精度的要求都很高,而連桿的剛性比較差,容易產(chǎn)生變形,因此在安排工藝過程時,就需要把各主要表面的粗精加工工序分開。逐步減少加工余量、切削力及內(nèi)應(yīng)力的作用,并修正加工后的變形,就能最后達(dá)到零件的技術(shù)要求。安排工藝進(jìn)程時,就要 把各主要表面的粗、精加工工序分開,即把粗加工安排在前,半精加工安排在中間,精加工安排在后面。這是由于粗加工工序的切削余量大,因此切削力、夾緊力必然大,加工后容易產(chǎn)生變形。粗、精加工分開后,粗加工產(chǎn)生的變形可以在半精加工中修正;半精加工中產(chǎn)生的變形可以在精加工中修正。本課題夾具設(shè)計為鉆連桿螺栓孔專用夾具設(shè)計。 關(guān)鍵詞 : 加工工藝;加工余量;尺寸鏈;夾具設(shè)計 ASTRACT The connecting rod is one of the main driving medium of diesel engine, this text expounds mainly the machining technology and the design of clamping device of the connecting rod. The precision of size, the precision of profile and the precision of position , of the connecting rod is demanded highly , and the rigidity of the connecting rod is not enough, easy to deform, so arranging the craft course, need to separate the each main and superficial thick finish machining process. Reduce the function of processing the surplus , cutting force and internal stress progressively , revise the deformation after processing, can reach the specification requirement for the part finally , Arrange technology process, the main surface coarse, finishing process, the former, half in balancing arrangement in the middle, finish machining precision arrangement in behind. This is due to the rough machining processes, thus cutting allowance of cutting force, clamping force inevitable large deformation, processed easily. After finishing separate coarse, moldings, deformation of finishing in half, Half of machining deformation of finishing in. This fixture design for drill connecting bolt hole special jig design. Keyword: Processing technology; ; Dimension chain; Fixture design 目 錄 第 1 章 緒 論 ...................................................... 1 設(shè)計任務(wù) ...................................................... 1 加工工藝規(guī)程設(shè)計的目的和意義 .................................. 1 連桿加工的發(fā)展趨勢 ............................................ 1 第 2 章 汽車連桿加工工藝規(guī)程設(shè)計 ................................. 3 連桿的結(jié)構(gòu)特點(diǎn) ................................................ 3 連桿的主要技術(shù)要求 ............................................ 3 大、小頭孔的尺寸精度、形狀精度 ............................... 3 大、小頭孔軸心線在兩個互相垂直方向的平行度 ............... 3 大、小頭孔中心距 ......................................... 4 連桿大頭孔兩端面對大頭孔中心線的垂直度 ................... 4 大、小頭孔兩端面的技術(shù)要求 ............................... 4 螺栓孔的技術(shù)要求 ......................................... 4 有關(guān)結(jié)合面的技術(shù)要求 ..................................... 4 連桿的材料和毛坯 .............................................. 5 連桿的機(jī)械加工工藝過程 ........................................ 6 連桿的機(jī)械加工工藝過程分析 .................................... 8 工藝過程的安排 ........................................... 8 定位基準(zhǔn)的選擇 ........................................... 8 確定合理的夾緊方法 ....................................... 9 連桿兩端面的加工 ........................................ 10 連桿大、小頭孔的加工 .................................... 10 連桿螺栓孔的加工 ........................................ 10 連桿體與連桿蓋的銑開工序 ................................ 11 大頭側(cè)面的加工 .......................................... 11 連桿加工工藝設(shè)計應(yīng)考慮的問題 ................................. 11 工序安排 ................................................ 11 定位基準(zhǔn) ................................................ 11 夾具使用 ................................................ 11 切削用量的選擇原則 ........................................... 12 粗加工時切削用量的選擇原則 ............................. 12 精加工時切削用量的選 擇原則 ............................. 13 確定各工序的加工余量、計算工序尺寸及公差 ..................... 13 確定加工余量 ........................................... 13 計算工藝尺寸鏈 ............................................... 14 連桿體的卡瓦槽的計算 ................................... 14 工時定額的計算 .............................................. 15 銑連桿大小頭平面 ....................................... 15 粗磨大小頭平面 ......................................... 16 加工小頭孔 ............................................. 16 銑大頭兩側(cè)面 ........................................... 17 擴(kuò)大頭孔 ............................................... 18 銑開連桿體和蓋 ......................................... 18 加工連桿體 ............................................. 19 銑、磨連桿蓋結(jié)合面 ..................................... 19 銑、鉆、鏜(連桿總成體) ............................... 20 粗鏜大頭孔 ............................................ 22 大頭孔兩端倒角 ........................................ 22 精磨大小頭兩平面(先標(biāo)記朝上) ........................ 22 鉆小頭油孔 ............................................. 23 半精鏜大頭孔及精鏜小頭孔 .............................. 23 精鏜大頭孔 ............................................ 24 小頭孔兩端倒角 ........................................ 24 鏜小頭孔襯套 .......................................... 24 珩磨大頭孔 ............................................ 25 連桿加工工藝卡片及供需卡片填寫 ...............................
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