畢業(yè)設(shè)計(jì)：2108發(fā)動(dòng)機(jī)機(jī)體主孔上雙向斜孔鉆模
論文說(shuō)明書(shū)共35頁(yè)，字?jǐn)?shù)總計(jì)：14519
資料內(nèi)容簡(jiǎn)介：
A0-2108發(fā)動(dòng)機(jī)機(jī)體主孔上雙向斜孔鉆模裝配總圖.dwg
A2-插銷軸.dwg
A3-導(dǎo)套.dwg
A3-定位銷.dwg
A3-堵蓋.dwg
A3-堵蓋-1.dwg
A3-夾壓滾子.dwg
A3-夾壓軸.dwg
A3-推銷推桿.dwg
A2-壓板.dwg
A1-夾具底座.dwg
A3-導(dǎo)向板.dwg
A4-液壓系統(tǒng)圖.dwg
A3-油缸定位套-1.dwg
A4-定位銷液壓系統(tǒng)圖.dwg
A4-限位擋鐵.dwg
A3-油缸定位套.dwg
A4-推桿搖臂.dwg
A4-推桿.dwg
A3-楔鐵.dwg
A4-彈簧.dwg
A4-襯套.dwg
A3-插銷推桿支架.dwg
A3-菱形定位銷.dwg
畢業(yè)設(shè)計(jì)論文說(shuō)明書(shū)：2108發(fā)動(dòng)機(jī)機(jī)體主孔上雙向斜孔鉆模.doc
畢業(yè)設(shè)計(jì)任務(wù)書(shū).doc
開(kāi)題報(bào)告.doc
外文.doc
譯文.doc
內(nèi)容提要
此次畢業(yè)設(shè)計(jì)任務(wù)是針對(duì)2108發(fā)動(dòng)機(jī)機(jī)體通主油道雙向斜油孔的設(shè)計(jì),在設(shè)計(jì)專用夾具時(shí)為了能滿足工件的加工精度要求，需要考慮合理的定位方案、合適的尺寸、公差和技術(shù)要求，并進(jìn)行必要的精度分析。
在發(fā)動(dòng)機(jī)機(jī)體上，通常兩側(cè)均勻布置有主油道孔，機(jī)油泵泵出的潤(rùn)滑油經(jīng)機(jī)油濾清器后從主油道沿著位于每一道主軸承隔壁中的橫油道流到曲軸主軸承中，從主油道通曲軸主軸承處的斜油道位于主軸承隔臂墻中，隔臂墻比較薄，而斜油孔有屬于深孔，這樣，加工十分困難。對(duì)于這種斜深孔加工，常用的加工方法是在搖臂鉆床上，設(shè)計(jì)一鉆床夾具，工件在夾具上定位采用一面兩銷，機(jī)體在夾具中斜向放置。這種加工缺陷是工件定位不是很穩(wěn)定，對(duì)銷產(chǎn)生的壓力很大，銷容易變形；且利用搖臂鉆床加工，生產(chǎn)效率不高。為此在分析發(fā)動(dòng)機(jī)機(jī)體雙向斜油孔加工工藝的基礎(chǔ)上，設(shè)計(jì)加工此斜油孔的組合機(jī)床夾具。
本課題設(shè)計(jì)的組合機(jī)床夾具采用了支架式結(jié)構(gòu)，夾具主要由三部分組成：夾具底座、夾具支架和夾具上座。夾具底座支承夾具支架和夾具上座，夾緊機(jī)構(gòu)放置在夾具底座內(nèi)；夾具上座，夾具底座和夾具支架組成的空間放置工件，工件通過(guò)滾道推入定位空間；定位銷，支撐板，鉆套及控制定位銷升縮的機(jī)構(gòu)等部件安裝在夾具上座中。
根據(jù)柴油機(jī)的設(shè)計(jì)與加工要求，機(jī)體加工過(guò)程中，大部分工序都是以一面兩銷定位，故加工主油道雙向斜油孔，采用以機(jī)體底面和底面上相距240 0.01mm的兩個(gè)直徑為16mm的工藝孔進(jìn)行定位，限制六個(gè)自由度，實(shí)現(xiàn)基準(zhǔn)統(tǒng)一和基準(zhǔn)重合原則。定位銷的伸縮可由液壓系統(tǒng)控制。考慮到工件的質(zhì)量較大，手動(dòng)夾緊難以實(shí)現(xiàn)，故采用液壓系統(tǒng)驅(qū)動(dòng)、斜楔夾緊機(jī)構(gòu)。


Summary
2108 engine block is the graduation design task for the main vittae two-way oblique oil hole design, in the design of special fixture in order to meet the workpiece when machining precision requirement, need to consider the reasonable positioning scheme, the right dimensions, tolerances, and technical requirements, and make the necessary accuracy analysis.
On engine body, usually on both sides of the uniform arrangement are the main oil passage hole, oil pump pumping the oil after the oil filter from the main oil passage along the located next door to each main bearing the cross flow into the crankshaft main bearing oil, from the main oil passage through the crankshaft main bearing of oblique oil duct is located in the main bearing arm of the wall insulation, lie between arm wall is thin, and oblique oil hole has belongs to deep hole, so that processing is difficult. For this kind of inclined deep hole processing, common processing method is on the radial drilling machine, a drill jig design, the workpiece on the fixture positioning using a two pin, the body placed diagonally in the jig. This kind of defect is workpieces position is not very stable, counter pressure is very big, pin easy to deformation; And the use of radial drilling machine processing, the production efficiency is not high. This two-way oblique oil hole processing technology on the analysis of the engine block, on the basis of designing the inclined oil hole modular machine tool fixture.
This topic design of modular machine tool fixture used the scaffolding structure, the fixture is mainly composed of three parts: clamp, clamp bracket and base seat base. Jig base supporting clamp bracket and the seat base, fastening device placed on the jig base inside; Clamp table and the base and the clamp bracket of space to place the workpiece, the workpiece through the raceway position into the space; Positioning pin, support plate, drill sets and control the positioning pin up institutions components installed in a fixture in attendance.
According to the design and processing requi ..