Four column hydraulic press 1 Four column hydraulic press used Four column hydraulic press is used for plastic materials in the pressing process Products such as powder molding plastic molding cold hot extrusion of metal forming sheet tension and transverse compression bending pressure turn through correction process 2 Four column Hydraulic Press Features Four column hydraulic press with an independent power sector and the electrical system using the button focus control enables adjustment manual and semi automatic three kinds of work Four column hydraulic pressure of work pressing speed load fast and slow down the schedule and the scope of may need to be adjusted according to process and can complete the top of the process can take the top out of process drawing process three kinds of process methods each process will be two way action for the selection process constant pressure molding process and constant distance molding process after the suppression of a delay with the top and automatic return Four column hydraulic characteristics Four column hydraulic press is the use of pressure compression forming objects Hydraulic oil is used to providing medium pressure Four column hydraulic machine structure is simple and economical practical Appearance by octagonal shape Four column hydraulic press control electrical box with glass doors PLC or computer control two general appliances with reliable direct action and maintenance Centralized control of the independent button With the adjustment his hands a single cycle of two kinds of operation mode Four column hydraulic press hydraulic control valve can be used into the integrated system and reliability long life small hydraulic impact reducing the connecting pipe and the leak point 3 Four column hydraulic machine failure and maintenance of the common methods Four column hydraulic machine failure and maintenance of the common methods in the winter and the worse condition should be ground on the four column hydraulic system inspection ground maintenance oil change jobs often Four column hydraulic press work on the oil storage and transfer should be very much attention Drums should plus special signs and keep it up and cover In the winter pay attention to the barrel while the result of the air condensed into water and mixed with oil not to be rusty rust bucket leather pieces into bins In winter on the four column hydraulic machine engine and other mechanical systems to the various preventive measures such as cover frost heat insulation for work with low viscosity oil are suitable for hydraulic system In the Four column hydraulic press hydraulic transmission system are some of the more sophisticated parts People on the hydraulic transmission system of the four column hydraulic machine feel that it is labor saving and convenient but at the same time feel that it is easy to damage The reason is not clear main working principle and structure characteristics of four column hydraulic which do not quite understand the preventive maintenance approach Hydraulic system has three basic causative factors pollution over heated and into the air These three negative factors has close relationship there any one issue it will create another one or more related problems From the practice shows that 75 of hydraulic system disease were caused by these three four column hydraulic press working oil into the dirt and due to deterioration overheating and into the air Solution Some of the major precision parts of the Four column hydraulic system cleaning and assembly shall be carried out in a very clean room indoor should be have clean floors and windows and closed doors the temperature is best maintained at around 20 4 Four column hydraulic machine common method of general maintenance 1 Four column hydraulic press failed in action because of electrical wiring is not strong then check the electrical fault 2 Four column hydraulic press slider creeping accumulation of air in system check the oil suction pipe if the oil can get into then move columns up and down and repeatedly pressurize adjusted accuracy is not right readjust accuracy 3 Four column hydraulic press with pressure when the slide slow down its support for excessive back pressure valve to the cylinder to adjust the cavity without pressure the maximum not more than 1 MPa 4 four column hydraulic press after stopping a serious one slipped under the brim slide pressure valve seal ring leakage adjustment pressure is too small or the pressure is not strictly adjust pressure check valve 5 Four column hydraulic pressure gauge pointer swings a powerful memory with air in the oil line pipe of the pressure gauge loosen the fittings slightly discharge gas mechanical vibration on the pressure gauge stuck the tube 3 with the damage on the pressure gauge replace the pressure gauge 6 Four column hydraulic machine travel speed is not enough pressure the pressure behind a high pressure pump flow adjustment to small the pump in the eccentricity 25MPa adjustable adjusted to 5 Georgia pump wear or leakage of serious burns 1 system according to the instructions to adjust pump If the pump back to the oil port leakage is large should remove the check 7 Four column hydraulic packing pressure drop is too fast when it is involved in the packing of loose or pipe leaking valve of liquid filled cylinder check the sealed joint of the pressure relief valve seal ring damage replacement seal ring 四柱液壓機 一 四柱液壓機的用途 四柱液壓機適用于可塑性材料的壓制工藝 如粉末制品成型 塑料制品成 型 冷 熱 擠壓金屬成型 板材張緊以及橫壓 彎壓 翻透 校正等工藝 二 四柱液壓機的特點 四柱液壓機具有獨立的動力機構(gòu)和電氣系統(tǒng) 采用按鈕集中控制 可實現(xiàn) 調(diào)整 手動及半自動三種工作方式 四柱液壓機的工作壓力 壓制速度 快速加 載和減速的行程和范圍均可根據(jù)工藝需要進行調(diào)整 并能完成頂出工藝 可帶頂 出工藝 拉伸工藝三種工藝方式 每種工藝又為定壓 定程兩種工藝動作供選擇 定壓成型工藝在壓制后能夠頂出延時及自動回程 四柱液壓機的特點 四柱液 壓機就是利用壓力使物體受壓成形 提供壓力的介質(zhì)是液壓油 四柱液壓機結(jié) 構(gòu)簡單 經(jīng)濟 實用 外觀采用八角形狀 四柱液壓機控制電器箱采用玻璃門 PLC 或電腦兩種形式控制 具有工作可靠 動作直觀 維修方便等特點 獨立按扭 集中控制 具有調(diào)整 雙手單次循環(huán)二種操作方式 四柱液壓機液壓控制可采用 插裝閥集成系統(tǒng) 動作可靠 使用壽命長 液壓沖擊小 減少了連接管路與泄漏點 三 四柱液壓機的常見故障和維護方法 四柱液壓機的常見故障和維護方法 在冬季和較壞的工況下 要對四柱液壓 機系統(tǒng)勤檢查 勤保養(yǎng) 常換工作油液 對四柱液壓機工作油的儲存和轉(zhuǎn)運工作 應(yīng)十分注意 盛油桶應(yīng)加專門的標(biāo)志使其向上并遮蓋好 在冬季 要注意桶內(nèi)因 空氣冷凝成水分而混入油中 勿使生銹的桶皮落入桶內(nèi) 冬季時對四柱液壓機發(fā) 動機與其他機械系統(tǒng)所采取的多項預(yù)防措施 如掩蓋防凍 加熱保溫 換用低黏度 工作油等 均適用于液壓系統(tǒng) 在四柱液壓機液壓傳動系統(tǒng)中 都是一些比較精 密的零件 人們對四柱液壓機的液壓傳動雖然覺得省力方便 但同時又感到它易 于損壞 究其原因 主要是不太清楚四柱液壓機工作原理和構(gòu)造特性 從而也不大 了解其預(yù)防保養(yǎng)的方法 液壓系統(tǒng)有 3 種基本的 致病 因素 污染 過熱和進入 空氣 這 3 種不利因素有著密切的內(nèi)在聯(lián)系 出現(xiàn)其中任何一個問題 就會連帶 產(chǎn)生另外一個或兩個問題 實踐證明 液壓系統(tǒng) 75 致病 的原因均是這三者造 成的 四柱液壓機工作油液因進入污物而變質(zhì) 過熱和進入空氣 解決方法 對 四柱液壓機系統(tǒng)中一些主要精密件的清洗和裝配 均應(yīng)在十分清潔的室內(nèi)進行 室內(nèi)應(yīng)有干凈的地板 窗戶和密閉的門窗 溫度最好保持在 20 左右 四 四柱液壓機常見的一般維修方法 1 四柱液壓機動作失靈 電氣接線不牢或接錯 檢查電氣 2 四柱液壓機滑塊爬行 系統(tǒng)內(nèi)積存空氣 檢查吸油管是否進油 上 下運動立柱并加壓 精度調(diào)整不當(dāng) 重新調(diào)整精度 3 四柱液壓機滑塊慢速下行時帶壓 支撐力過大 調(diào)整背壓閥使上缸上腔 不帶壓 最大不大于 1MPa 4 四柱液壓機停車后滑塊下溜嚴(yán)重 缸口密封環(huán)滲漏 壓力閥調(diào)整壓力太 小或壓口不嚴(yán) 調(diào)整壓力檢查閥口 5 四柱液壓機壓力表指針擺動厲害 壓力表油路內(nèi)存有空氣 略擰松 管接頭 放氣 管路機械振動 將管路卡住 壓力表損壞 更換壓力表 6 四柱液壓機行程速度不夠上壓慢 高壓泵流量調(diào)得過小 按泵的說 明書進行調(diào)整 在 25MPa 時泵偏心可調(diào)調(diào)至 5 格 泵磨損或因嚴(yán)重?zé)齻?漏 若泵回油口泄漏變大時 應(yīng)拆下檢查 7 四柱液壓機保壓時壓降太快 參與保壓的各閥門不嚴(yán)或管路漏油 檢查壓力溢流閥之密封情況 密封環(huán)損壞 更換密封環(huán) 內(nèi)蒙古科技大學(xué) 本科生畢業(yè)設(shè)計外文翻譯 學(xué)生姓名 崔家賓 學(xué) 號 0866121108 專 業(yè) 機械設(shè)計制造及其自動化 班 級 機械 08 3班 指導(dǎo)教師 徐平