【正文】
(8) Replacement of the device, the pin should be the appropriate treatment, welding should not be used in welding acidic oil. (9) Record on the circuit switch, the jumper position, it should not be changed. Control for more than two inspections, or swap ponents onboard when the attention of the ponents of the tag in order to avoid confusion, which can not work well plate. (10) investigated the power circuit board configurations and types, according to the required inspection can be powered separately or all of power. Should pay attention to highpressure, and some direct access to highvoltage circuit board, or board has highvoltage generator, in need of appropriate insulation, should pay special attention to the operation. Finally, I think: repair should not stick to conventions, the theory of Health to move things, we must bine the local actual situation at that time, open thinking, step by step analysis, ruled out one by one until find the real cause of the malfunction. To sum up, the development of CNC technology with modern puter technology, electronic technology developments, and development and is based on the needs of production development. CNC technology now mature, deeper and broader development will be faster. The future system will enable CNC machine with a better and cheaper. References: 1. ZHANG Yaozong. A Practical Handbook for the preparation of machining group. Machinery Industry Press, 1997 機械專業(yè)中英文文獻翻譯 中文譯文 數(shù)控加工工藝 一,我國數(shù)控系統(tǒng)的發(fā)展史 1958 年起,由一批科研院所,高等學(xué)校和少數(shù)機床廠起步進行數(shù)控系統(tǒng)的研制和開發(fā)。 80 年代曾有過高速發(fā)展的階段,許多機床廠從傳統(tǒng)產(chǎn)品實現(xiàn)向數(shù)控化產(chǎn)品的轉(zhuǎn)型。 1. 合理選擇切削用量 對于高效率的金屬切削加工來說,被加工材料、切削工具、切削條件是三大要素。伴隨著切削速度的提高,刀尖溫度會上升,會產(chǎn)生機械的、化學(xué)的、熱的磨損。它比切削速度對刀具的影響小。有規(guī)則的、穩(wěn)定的磨損達到壽命才是理想的條件。 2. 合理選擇刀具 1) 粗車時,要選強度高、耐用度好的刀具,以便滿足粗車時大背吃刀量、大進給量的要求。 4. 確定加工路線 加工路線是指數(shù)控機床加工過程中,刀具相對零件的運動軌跡和方向。 6. 夾具安裝要點 目前液壓卡盤和液壓夾緊油缸的連接是靠拉桿實現(xiàn)的,如圖 1。換言之,自動裝夾時,不會影響另一主軸的加工,這一特點可以縮短大約 10%的加工時間。 常規(guī)車削和硬車之間的不同點僅僅在于刀架和集中恒溫冷卻液系統(tǒng)。采用 G200 車削中心進行加工時,冷啟動后最多需要加工 4 個工件,就可以達到 177。 G200 車削中心在德國寶馬 Landshut 公司汽車制造廠的應(yīng)用中取得了良好的效果。 此外,加工的萬向節(jié)使用了 Index 公司全自動智能加工單元。在機床內(nèi)完成在 線測量,然后送至卸料單元。 (一)、程序首句妙用 G00 的技巧 目前我們所接觸到的教科書及數(shù)控車削方面的技術(shù)書籍,程序首句均為建立工件坐標系,即以 G50 Xα Zβ作為程序首句。 上述步驟中,步驟 6即刀具定位在 XαZβ處至關(guān)重要,否則,工件坐標系就會被修改,無法正常加工工件。其操作過程只需采用上述找 G50過程的前五步,即完成步驟 5 后,將刀具運行至安全位置,調(diào)出程序,按自動運行即可 。如用 2 號切斷刀切槽時工件尺寸大了 ,而 002 處刀補顯示是 ,則可輸入 ,減少 2 號刀補。 2. 半精加工消除絲桿間隙影響保證尺寸精度 對于大部分數(shù)控車床來說,使用較長時間后,由于絲 桿間隙的影響,加工出的工件尺寸經(jīng)常出現(xiàn)不穩(wěn)定的現(xiàn)象。 3. 程序編制保證尺寸精度 a. 絕對編程保證尺寸精度 編程有絕對編程和相對編程。如用 1 號刀 G71 粗加工外圓之后,可在 001 刀補處輸入 ,調(diào)用 G70 精車一次,停車測量后,再在 001 刀補處輸入 ,再次調(diào)用 G70精車一次。 同理,對于軸向尺寸的控制亦如此類推。上述程序首句用 G00 代替 G50 的實質(zhì)是將工件坐標系固定在機床上,不再囿于 G50 Xα Zβ程序原點的限制,不改變工件坐標系,操作簡單,可靠性強,收到了意想不到的效果。如果是批量生產(chǎn),加工完一件后,回 G50 起點繼續(xù)加工下一件,在操作過程中稍有失誤,就可能修改工件坐標系。采用這種方法編寫程序,對刀后,必須將刀移動到 G50 設(shè)定的既定位置方能進行加工,找準該位置的過程如下。 四,數(shù)控車削加工中妙用 G00 及保證尺寸精度的技巧 數(shù)控車削加工技術(shù)已廣泛應(yīng)用于機械制造行業(yè),如何高效、合理、按質(zhì)按量完成工件機械專業(yè)中英文文獻翻譯 的加工,每個從事該行業(yè)的工程技術(shù)人員或多或少都有自己的經(jīng)驗。最后一道工序中,采用了第二個 Index加工系統(tǒng)。質(zhì)量監(jiān)督人員認為,其加工精度非常精確:連續(xù)公差帶為 177。加工過程中,精度通常保持在 2mm。在兩種類型的機床上都可進行干式硬加工,只是工藝方案的制造者需要精心設(shè)計平衡的節(jié)拍時間,而 Index機床提供的模塊結(jié)構(gòu)使其具有更強的靈活性。當(dāng)機床是成對投入使用的時候,效率的提高更為明顯。 三,進行有效合理的車削加工 有效節(jié)省加工時間 Index公司的 G200 車削中心集成化加工單元具有模塊化、大功率雙主軸、四軸聯(lián)動的功能,從而使加 工時間進一步縮短。 5. 加工路線與加工余量的聯(lián)系 目前,在數(shù)控車床還 未達到普及使用的條件下,一般應(yīng)把毛坯上過多的余量,特別是含有鍛、鑄硬皮層的余量安排在普通車床上加工。 機械專業(yè)中英文文獻翻譯 3) 為減少換刀時間和方便對刀,應(yīng)盡量采用機夾刀和機夾刀片。在確定加工條件時,需要根據(jù)實際情況進行研究。 用戶要根據(jù)被加工的材料、硬度、切 削狀態(tài)、材料種類、進給量、切深等選擇使用的切削速度。 進給條件與刀具后面磨損關(guān)系在極小的范圍內(nèi)產(chǎn)生。經(jīng)濟有效的加工方式必然是合理的選擇了切削條件。從 1 9 9 5 年 “九五 ”以后國家從擴大內(nèi)需啟動機床市場,加強限制進 口數(shù)控設(shè)備的審批,投資重點支持關(guān)鍵數(shù)控系統(tǒng)、設(shè)備、技術(shù)攻關(guān),對數(shù)控設(shè)備生產(chǎn)起到了很大的促進作用,尤其是在 1 9 9 9 年以后,國家向國防工業(yè)及關(guān)鍵民用工業(yè)部門投入大量技改資金,使數(shù)控設(shè)備制造市場一派繁榮。 ,我國數(shù)控技術(shù)才逐步取得實質(zhì)性的發(fā)展。 6. Program entry mode, enter the G00 Xα Zβ, programming tool runs the specified procedure to the starting point, and then enter the G50 Xα Zβ, procedures for the origin of the puter memory. The abovementioned steps, the steps that the tool 6 at XαZβ Office location is essential。 2. Spindle is to hand round the base right side knife flat work piece surface A。 6mm. Processing process, the accuracy is usually maintained at 2mm. Index so made available to the pany39。 2) should try to shorten the processing route, reducing travel time and air knives. 5. Processing route of contact with allowance At present, CNC lathes have not yet achieved the universal access to conditions, the general should be put on too much rough margin, especially with fing, casting hard cushion cortex in general lathe processing. Must be such as CNC lathe, the need to pay attention to process flexibility. 6. Fixture to install the main points at present, the hydraulic clamping chuck and hydraulic cylinder are connected by the rod of the implementation, in Figure 1. Hydraulic clamping chuck as follows: First of all, by moving on hand to unload the nut hydraulic cylinder, the discharge of SLIDE, and backend from the spindle out, and then move the hands to unload screw chuck can be disposed of under the chuck. Four, effectively turning a reasonable Save processing time Index Turning Center39。s defense industry to civilian industry and the key to putting in a lot of technical department funds, to enable CNC equipment manufacturer market thriving. Three, CNC Technology and Equipment of cars cut CNC Lathe Machining Lathe technology and processing technology similar to, but because of CNC lathe is a fixture, for automatic processing of all finish turning process, which should pay attention to the following aspects. 1. A reasonable selection cutting for the highefficiency metalcutting processing, the processed materials, cutting tools, cutting conditions is the three major elements. These determine the processing time, tool life and processing quality. Costeffective processing methods must be a reasonable choice of the cutting conditions. Three elements of cutting conditions: cutting speed, feed rate and cutting de