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徐州工程學(xué)院畢業(yè)設(shè)計(jì)(論文)
摘要
鋼筋切斷機(jī)是把鋼筋切成所需長(zhǎng)度的專用機(jī)械在大型建筑工地上的應(yīng)用非常廣泛。鋼筋切斷機(jī)分為機(jī)械傳動(dòng)和液壓傳動(dòng)兩種。機(jī)械傳動(dòng)式鋼筋切斷機(jī),工作時(shí)大都采用電動(dòng)機(jī)經(jīng)一級(jí)三角帶傳動(dòng)和二級(jí)齒輪傳動(dòng)減速后,帶動(dòng)曲軸旋轉(zhuǎn),曲軸推動(dòng)連桿使滑塊和動(dòng)刀片在機(jī)座的滑道中作往復(fù)直線運(yùn)動(dòng),使活動(dòng)刀片和固定刀片相錯(cuò)而切斷鋼筋。
GQ40B型鋼筋切斷機(jī)，其剪切運(yùn)動(dòng)是由一曲型的曲軸連桿機(jī)構(gòu)完成的。但是由于切斷機(jī)機(jī)體內(nèi)腔狹小，在裝配曲軸連桿時(shí)比較困難。尤其是在使用中發(fā)生故障需要維修時(shí)，拆卸曲軸連桿更加不容易，給維修造成很大的不變，因此在不改變?cè)O(shè)備功能的情況下，我對(duì)曲軸連桿機(jī)構(gòu)做了一些改進(jìn)。
改進(jìn)后的凸輪結(jié)構(gòu)直接從機(jī)體航的注冊(cè)孔中裝入和取出。而不必拆卸連桿，大大簡(jiǎn)化了裝配程序，減輕的工人的勞動(dòng)強(qiáng)度。同時(shí)也極大的方便了維修，還簡(jiǎn)化了零件的工藝過程，取得良好的經(jīng)濟(jì)效益。
關(guān)鍵詞 鋼筋切斷機(jī)；凸輪；曲軸連桿機(jī)構(gòu)
Abstract
Reinforcing steel cutting machine is to cut the required length of steel machinery specialized for large construction sites in the application of very extensive. Reinforcing steel cutting machine into mechanical transmission and hydraulic transmission of two. Mechanical transmission reinforced cutting machine, working mostly used as a V-belt drive motor and gear drive slow down after two, driven crankshaft rotation, promoting the crankshaft and connecting rod to move the slider blade in the frame of the chute in a reciprocating linear motion So that the activities of the blade and a fixed blade and cut off the wrong steel.
GQ40B-steel cutter, cut its movement from one type of linkage to complete the crankshaft. However, due to cut off the small inner cavity of the body, in the assembly when the crankshaft link more difficult. Especially in the use of a fault in need of repair, demolition crank link more difficult to repair a big change, so do not change the function of the equipment under the circumstances, we crank linkage has made some improvement.
The improved structure of the cam directly from the body of the aircraft registered in the hole and packed out. Without dismantling the link, greatly simplifies the assembly, reduce labor intensity of workers. But also greatly facilitate the maintenance, has also simplified the process of parts and achieved good economic returns.
Keywords Reinforcing steel cutting machine Cam Crankshaft Linkage
目錄
1緒論 1
1.1鋼筋切斷機(jī)的作用 1
1.2鋼筋切斷機(jī)的機(jī)理 1
1.2.1壓入變形階段 1
1.2.2剪切滑移階段 2
1.2.3剪切滑移階段作用力分析 3
1.2.4剪切全過程剪力分析 4
1.2.5綜合分析 4
1.3鋼筋切斷機(jī)理分析 7
1.3.1目前鋼筋切斷機(jī)存在的問題 9
1.3.2鋼筋切斷機(jī)前景 10
2電動(dòng)機(jī)的選擇 11
2.1計(jì)算剪切力P 11
2.2切斷機(jī)匹配電動(dòng)機(jī)功率理論計(jì)算 11
3減速器的設(shè)計(jì) 13
3.1傳動(dòng)比的計(jì)算與分配 13
3.2計(jì)算傳動(dòng)裝置的運(yùn)動(dòng)和動(dòng)力參數(shù) 13
3.3帶的選擇 14
3.3.1帶的計(jì)算 14
3.3.2帶的根數(shù)確定 15
3.4齒輪的設(shè)計(jì)及模數(shù)的選擇 15
3.4.1第一級(jí)齒輪傳動(dòng)設(shè)計(jì) 15
3.4.2第二級(jí)齒輪傳動(dòng)設(shè)計(jì)方法同第一級(jí)設(shè)計(jì) 17
3.5軸徑的選擇以及軸承的選擇 19
3.5.1軸徑的計(jì)算 19
3.5.2軸的校核 20
3.6滾動(dòng)軸承的選擇計(jì)算 23
3.7標(biāo)準(zhǔn)件 24
4連桿的設(shè)計(jì) 25
5提高強(qiáng)度的幾種方法 27
5.1機(jī)體強(qiáng)度提高的設(shè)計(jì) 27
5.2改變壓刀結(jié)構(gòu) 28
5.3其他部件的改進(jìn)設(shè)計(jì) 28
6鋼筋切斷機(jī)強(qiáng)度計(jì)算參考 30
6.1機(jī)體額口的強(qiáng)度計(jì)算 30
6.2應(yīng)力計(jì)算 31
6.2.1正應(yīng)力計(jì)算 31
6.2.2計(jì)算剪切力P 31
6.3計(jì)算剪切力P 32
6.3.1計(jì)算正應(yīng)力 32
6.3.2計(jì)算最大應(yīng)力 32
6.3.3試棒 32
6.4測(cè)試方法 32
6.4.1剪切力的測(cè)量 32
6.4.2應(yīng)力測(cè)量 33
6.4.3測(cè)試結(jié)果和理論計(jì)算分析情況對(duì)比分析 33
7機(jī)械式鋼筋切斷機(jī)調(diào)整及保養(yǎng)的使用 35
7.1鋼筋切斷機(jī)的使用調(diào)整 35
7.2保養(yǎng) 37
7.3安全一般規(guī)定 37
結(jié)論 38
致謝 39
參考文獻(xiàn) 40
附錄 41
附錄1 41
附錄2 46
4