【溫馨提示】 dwg后綴的文件為CAD圖,可編輯,無(wú)水印,高清圖,,壓縮包內(nèi)文檔可直接點(diǎn)開(kāi)預(yù)覽,需要原稿請(qǐng)自助充值下載,請(qǐng)見(jiàn)壓縮包內(nèi)的文件及預(yù)覽,所見(jiàn)才能所得,請(qǐng)細(xì)心查看有疑問(wèn)可以咨詢QQ:414951605或1304139763
內(nèi)蒙古科技大學(xué)
本科生畢業(yè)設(shè)計(jì)說(shuō)明書(shū)
題 目:連鑄小方坯液壓剪切機(jī)液壓系
統(tǒng)設(shè)計(jì)
學(xué)生姓名:白志峰
學(xué) 號(hào):200440401101
專 業(yè):機(jī)械設(shè)計(jì)制造及其自動(dòng)化
班 級(jí):機(jī)2004-1班
指導(dǎo)教師:?jiǎn)涛膭?副教授
I
內(nèi)蒙古科技大學(xué)設(shè)計(jì)說(shuō)明書(shū)
連鑄小方坯液壓剪切機(jī)液壓系統(tǒng)設(shè)計(jì)
摘要
剪切機(jī)廣泛地被運(yùn)用在軋鋼機(jī)械中,本文中涉及的是連鑄機(jī)采用剪切機(jī)對(duì)各種型號(hào)的鋼坯進(jìn)行定尺處理。液壓剪切機(jī)比火焰切割機(jī)運(yùn)行成本低,而在同等的體積下,液壓裝置能比電氣裝置產(chǎn)生出更大的動(dòng)力;同樣在同等的功率下,液壓裝置的體積小、重量輕、結(jié)構(gòu)緊湊。所以從各種角度看選擇液壓剪切機(jī)是比較合理的。液壓剪切機(jī)是用液壓作為主傳動(dòng)的剪切機(jī),該剪切機(jī)采用平行刀片式的下切式。下切式剪切機(jī)的上下兩個(gè)刀片都是運(yùn)動(dòng)的,但剪切扎件的動(dòng)作是由下刀片來(lái)完成的。目前被廣泛應(yīng)用于初軋和鋼坯車間。
剪切機(jī)液壓系統(tǒng)主要由三部分組成。分別是下刀臺(tái)系統(tǒng)、輥道小車驅(qū)動(dòng)系統(tǒng)和上刀臺(tái)抬升系統(tǒng)。其中下刀臺(tái)剪切系統(tǒng)主要控制下刀片的進(jìn)刀和快退;輥道小車驅(qū)動(dòng)系統(tǒng)主要用于前進(jìn)時(shí)保持剪切機(jī)與鋼坯同速,剪切完成后快速返回;上刀臺(tái)抬升系統(tǒng)用來(lái)移動(dòng)上刀臺(tái)。其中下刀臺(tái)剪切缸單獨(dú)采用變量泵驅(qū)動(dòng),而輥道下車油缸和上刀臺(tái)抬升缸共用一個(gè)定量泵,其動(dòng)作由換向閥實(shí)現(xiàn)。
關(guān)鍵詞:剪切機(jī) 、 輥道小車 、 油缸
Abstract
Shearing machine is widely used in steel rolling machines,this paper introduces the continuous casting machine by useing shearing machine to handle various types of steel billet. Hydraulic shearing machine has lower operating cost than flame cutting machines. However, in the same volume, the hydraulic device generates mush power than electrical equipment. In the same power, the hydraulic device small volume, light weight and compact structure. So from various perspectives, choosing hydraulic shearing machine is more reasonable. Hydraulic
shearing machine is a kind of shearing machine that uses hydraulic pressure as the main drive. It chooses the down-cut sheet of parallel slice. The up-cut sheet and the down-cut sheet of down-cut shearing machine are movable, but the action of shearing the rolled piece is done by down-cut sheet. At present, it is widely used in the workshop of bloom and billet.
The hydraulic system of shearing machine mainly consists of three parts: the system of down-cut bed, the driving system of table roller vehicle and the system lifted by top-cut set. Its down-cut bed’s shearing system. Mainly controls advancement and retreat of the down-cut slice. The driving system of table roller vehicle is used to keep the shearing machine having the same speed with billet and resets quickly after finishing shearing. The lifting system of top-cut table can drift the top-cut bed. And the shear cylinder of down-cut bed is driven by variable pump independently, while the cylinder of table roller and lifting vat of top-cut bed are used a quantitative pump, and the operation is done by using reversing valve.
Key words: shearing machine;table roller vehicle; fuel tank
目錄
摘要 ………………………………………………………………………………I
Abstract …………………………………………………………………………II
第一章 緒 論………………………………………………………………………1
1.1 連鑄連軋技術(shù)的簡(jiǎn)介………………………………………………… 1
1.2 剪切機(jī)的類型、特點(diǎn)及選型………………………………………… 4
第二章 液壓剪切機(jī)的設(shè)計(jì)計(jì)算………………………………………………… 7
2.1 剪切機(jī)結(jié)構(gòu)參數(shù)的確定……………………………………………… 7
2.1.1刀片行程…………………………………………………………… 7
2.1.2刀片尺寸的確定…………………………………………………… 8
2.1.3剪切機(jī)理論空行程次數(shù)…………………………………………… 9
2.2 剪切機(jī)能力參數(shù)計(jì)算……………………………………………………9
2.2.1剪切過(guò)程分析……………………………………………………… 9
2.2.2平行刀片剪切機(jī)的剪切力與剪切功………………………………10
第三章 剪切機(jī)液壓傳動(dòng)系統(tǒng)的設(shè)計(jì)與計(jì)算……………………………………13
3.1 剪切機(jī)的設(shè)計(jì)要求與參數(shù)……………………………………………13
3.1.1設(shè)計(jì)要求……………………………………………………………13
3.1.2設(shè)計(jì)參數(shù)……………………………………………………………13
3.2 進(jìn)行工況分析,確定液壓系統(tǒng)的主要參數(shù)…………………………14
3.2.1液壓缸的載荷計(jì)算…………………………………………………14
3.2.2初選系統(tǒng)的工作壓力………………………………………………17
3.2.3液壓缸的主要結(jié)構(gòu)尺寸計(jì)算………………………………………18
3.2.4各工況所需時(shí)間及速度的計(jì)算……………………………………22
3.2.5液壓執(zhí)行元件實(shí)際所需流量的計(jì)算………………………………23
3.2.6液壓執(zhí)行元件實(shí)際工作壓力的計(jì)算………………………………24
3.2.7擬定液壓系統(tǒng)工況圖………………………………………………25
3.3 制定液壓系統(tǒng)基本方案和擬定液壓系統(tǒng)圖………………………… 26
3.3.1制定基本方案………………………………………………………26
3.3.2擬定液壓系統(tǒng)圖……………………………………………………31
3.4 液壓元件的選擇………………………………………………………32
3.4.1 液壓泵的選擇…………………………………………………… 32
3.4.2 電動(dòng)機(jī)功率的確定………………………………………………34
3.4.3 液壓閥的選擇……………………………………………………35
3.4.4 油管內(nèi)徑的確定…………………………………………………36
3.4.5 油箱的有效面積的確定…………………………………………38
3.5 液壓系統(tǒng)性能驗(yàn)算……………………………………………………38
3.5.1 驗(yàn)算回路中的壓力損失………………………………………… 38
3.5.2 驗(yàn)算液壓系統(tǒng)發(fā)熱溫升………………………………………… 46
第四章 液壓缸的設(shè)計(jì)計(jì)算………………………………………………………51
4.1 計(jì)算液壓缸的結(jié)構(gòu)尺寸……………………………………………… 51
4.1.1 缸筒長(zhǎng)度L…………………………………………………………51
4.1.2 最小導(dǎo)向長(zhǎng)度的確定…………………………………………… 51
4.2 液壓缸主要零部件設(shè)計(jì)………………………………………………52
4.2.1 缸筒……………………………………………………………… 52
4.2.2 活塞……………………………………………………………… 55
4.2.3 活塞桿的導(dǎo)向套和密封………………………………………… 55
4.2.4 緩沖裝置………………………………………………………… 56
4.2.5 放氣裝置………………………………………………………… 56
4.2.6 油口……………………………………………………………… 57
第五章 閥板的設(shè)計(jì)………………………………………………………………58
4.1 閥板連接概述…………………………………………………………58
4.2 閥板的設(shè)計(jì)……………………………………………………………58
4.2.1 確定閥板的數(shù)量………………………………………………58
4.2.2 液壓元件位置的布置…………………………………………59
4.2.3 閥板材料及孔徑的確定………………………………………59
參考文獻(xiàn) …………………………………………………………………………60
結(jié)束語(yǔ) ……………………………………………………………………………62
VI