購(gòu)買設(shè)計(jì)請(qǐng)充值后下載，，資源目錄下的文件所見即所得，都可以點(diǎn)開預(yù)覽，，資料完整，充值下載可得到資源目錄里的所有文件。。?！咀ⅰ浚篸wg后綴為CAD圖紙，doc,docx為WORD文檔，原稿無(wú)水印，可編輯。。。具體請(qǐng)見文件預(yù)覽，有不明白之處，可咨詢QQ:12401814
畢業(yè)設(shè)計(jì)（論文）文件清單
畢業(yè)設(shè)計(jì)（論文）題目： 定位支座數(shù)控加工夾具設(shè)計(jì)
姓名： 江本恒 班 級(jí)： 機(jī)自07-1
編號(hào)
名稱
件數(shù)
頁(yè)數(shù)
1
畢業(yè)設(shè)計(jì)（論文）說(shuō)明書
2
畢業(yè)
設(shè)計(jì)
（論文）附件
畢業(yè)設(shè)計(jì)（論文）任務(wù)書
3
畢業(yè)設(shè)計(jì)（論文）開題報(bào)告
4
畢業(yè)設(shè)計(jì)（論文）工作計(jì)劃
5
文獻(xiàn)綜述
6
外文文獻(xiàn)翻譯
7
畢業(yè)設(shè)計(jì)（論文）工作總結(jié)
8
圖
紙
A0
9
A1
10
A2
11
A3
12
A4
13
電子文檔
14
其
它
畢業(yè)設(shè)計(jì)（論文）選題報(bào)告
15
畢業(yè)設(shè)計(jì)（論文）指導(dǎo)記錄
16
畢業(yè)設(shè)計(jì)（論文）中期檢查表
備
注
大連水產(chǎn)學(xué)院本科畢業(yè)論文（設(shè)計(jì)）
目 錄
摘要………………………………………………………………………………………………Ⅴ
Abstract…………………………………………………………………………………………Ⅵ
前言…………………………………………………………………………………… 1
1 零件的用途……………………………………………………………………………………2
1.1 計(jì)算零件生產(chǎn)綱領(lǐng) 確定零件的加工類型……………………………… 2
1.2 研究分析被加共零件圖和被加工零件的原始資料，審查改善零件的結(jié)構(gòu)工藝性。…………………… …………… …………… …………………………2
1.3毛坯種類的選擇………………………………………………………………………3
1.4零件毛坯的工藝性分析……………………………………………………………3
2 數(shù)控加工工藝分析…………………………………………………………5
2.1零件介紹…………………………………………………………………5
2.2數(shù)控加工工藝的合理性分析……………………………………………5
2.3數(shù)控加工工藝的特點(diǎn)……………………………………………………5
2.3.1 數(shù)控加工的一般特點(diǎn)……………………………………………5
2.3.2數(shù)控加工工藝的特殊要求……………………………………… 6
2.4 零件的工藝性分析………………………………………………………6
2.4.1零件圖樣的具體工藝分析………………………………………7
2.5數(shù)控加工工藝過(guò)程的擬定………………………………………………9
2.5.1 工序順序安排的一般原則………………………………………… 9
2.5.2工步順序安排的一般原則…………………………………………………… 9
2.6進(jìn)給路線的確定…………………………………………………………10
2.6.1確定進(jìn)給路線的主要原則……………………………………… 10
2.7工件的裝夾………………………………………………………………10
2.7.1定位基準(zhǔn)選擇的一般原則………………………………………………10
2.7.2工件定位方案……………………………………………………………10
2.8切削用量的確定…………………………………………………………11
2.8.1背吃刀量的確定……………………………………………………11
2.8.2主軸轉(zhuǎn)速的確定……………………………………………………12
2.8.3進(jìn)給速度的確定……………………………………………………12
2.9加工刀具的選擇…………………………………………………………13
2.9.1選擇數(shù)控刀具通常應(yīng)考慮的因素…………………………………13
2.9.2面銑刀主要參數(shù)的選擇……………………………………………13
2.9.3鉆孔刀具及其選擇…………………………………………………14
2.9.4鏜孔刀具及其選擇…………………………………………………14
3 工藝規(guī)程的制訂…………………………… ………… ………………………16
3.1零件的工藝性分析…………………………………………………………16
3.1.1工序10………………………………………………………………16
3.1.2工序20………………………………………………………………16
3.1.3工序30………………………………………………………………16 3.1.4工序40………………………………………………………………16 3.1.5工序50………………………………………………………………17 3.1.6工序60………………………………………………………………17
3.1.7工序70………………………………………………………………17
總 結(jié)…………………………………………………………………………… 19
致謝……………………………………………………………………………… 20
參考文獻(xiàn)…………………………………………………………………………21
摘 要
本論文主要研究的是不規(guī)則零件在現(xiàn)代制造業(yè)中的廣泛應(yīng)用，那么保證此類零件的加工精度就顯得尤為重要。本課題通過(guò)分析定位支座零件的結(jié)構(gòu)特點(diǎn)和加工要求，用數(shù)控加工中心來(lái)達(dá)到多工位的加工目的,提高零件在大批量生產(chǎn)制造過(guò)程中的效率,同時(shí)制定了一套較為合理加工工藝規(guī)程，從而為保證該零件的加工精度將提供一種經(jīng)濟(jì)實(shí)用的夾具設(shè)備，具有一定的實(shí)用價(jià)值，在論文中會(huì)以研究零件的工藝規(guī)程開始著手設(shè)計(jì)最為適合的夾具，在不同的夾緊方案下進(jìn)行比較，并且以平面加工為定位方法，通過(guò)夾緊力的計(jì)算和定位誤差達(dá)到比較，選則最為恰當(dāng)、最為合理的夾具設(shè)計(jì)方案，從而保證了被加工零件的精度以及工件在加工過(guò)程中定位的可靠和準(zhǔn)確，夾具提供足夠大的夾緊力以防止工件位移，工件在夾緊力的作用下形變小。從而使得夾具在裝夾工件進(jìn)行加工的過(guò)程中正真發(fā)揮其作用,提高勞動(dòng)的生產(chǎn)效率、具備一定的實(shí)用價(jià)值。
關(guān)鍵字：夾具裝夾，定位，加工精度，平面加工,多工位
ABSTRACT
This paper is a study of irregular parts in the modern manufacturing a wide range of applications, then ensure that such parts of the machining accuracy is particularly important. Positioning the subject by analyzing the structure of parts bearing the characteristics and processing requirements to achieve the CNC Machining Center multi-purpose processing, high-volume production parts to improve manufacturing process efficiency, while more reasonable to develop a set of processing a point of order, so as to ensure that the machining accuracy will provide an economical and practical equipment of the fixture has a certain practical value, in the paper will be to study the parts of the process started to design a point of order most suitable for the fixture,
In different comparison under clamping and positioning with planar processing method for the calculation of clamping force and position error to compare the election is the most appropriate and most reasonable design of the jig, thus ensuring the accuracy of parts processed and the workpiece during processing of reliable and accurate positioning, fixtures provide the clamping force is large enough to prevent displacement of the workpiece, the workpiece clamping force in the role of small deformation. So that the workpiece clamping fixture for processing in the process of Chiang Kai-shek really play its role in enhancing the productivity of labor, have a certain practical value.
Keywords: Fixture clamping, positioning, machining accuracy, planar processing, multi -
VI
DFU-07-414：
大連水產(chǎn)學(xué)院畢業(yè)設(shè)計(jì)（論文）教師選題報(bào)告表
課題名稱
定位支座數(shù)控加工夾具設(shè)計(jì)
課題性質(zhì)
真實(shí)
課題類型
數(shù)控
課題來(lái)源
生產(chǎn)
指導(dǎo)教師姓名
李剛
年 齡
職稱（學(xué)位）
講師
所在單位
數(shù)控教研室
從事專業(yè)
數(shù)控教研
聯(lián)系電話
課題簡(jiǎn)介：（主要內(nèi)容、目前研究現(xiàn)狀、意義、需要條件、時(shí)間安排、預(yù)期成果及表現(xiàn)形式。）
畢業(yè)設(shè)計(jì)是培養(yǎng)學(xué)生實(shí)踐能力的重要環(huán)節(jié)之一，并進(jìn)行了專門的生產(chǎn)實(shí)習(xí)，它是對(duì)我們大學(xué)所學(xué)課程的綜合檢驗(yàn)。在學(xué)習(xí)過(guò)程中老師以理論與生產(chǎn)實(shí)踐相結(jié)合的教學(xué)方式，因此在此次畢業(yè)設(shè)計(jì)中要求我們?nèi)婢C合地運(yùn)用所學(xué)課程的理論和實(shí)踐知識(shí)進(jìn)行零件加工工藝規(guī)程的設(shè)計(jì)。其目的在于：
（1）培養(yǎng)我們運(yùn)用機(jī)械制造工藝學(xué)，數(shù)控加工工藝及有關(guān)課程（工程材料與熱處理、機(jī)械設(shè)計(jì)、公差與測(cè)量技術(shù)、金屬切削原理與刀具、數(shù)控機(jī)床自動(dòng)編程等）的知識(shí)。獨(dú)立地分析和解決工藝問題。初步具備設(shè)計(jì)一個(gè)中等復(fù)雜程度零件的工藝規(guī)程的能力。
（2）能根據(jù)被加工零件的技術(shù)要求運(yùn)用夾具設(shè)計(jì)的基本原理和方法，學(xué)會(huì)擬定夾具設(shè)計(jì)方案，完成夾具結(jié)構(gòu)設(shè)計(jì)，提高結(jié)構(gòu)設(shè)計(jì)能力。當(dāng)然，夾具設(shè)計(jì)不在本次設(shè)計(jì)范圍內(nèi)！
（3）培養(yǎng)我們熟悉并運(yùn)用有關(guān)手冊(cè)，圖表等技術(shù)資料的能力。
（4）進(jìn)一步培養(yǎng)我們識(shí)圖，制圖，運(yùn)算和編寫技術(shù)文件等基本的技能。
（5）更更重要的是培養(yǎng)了我們嚴(yán)肅認(rèn)真，一絲不茍和實(shí)事求是的工作作風(fēng)，從而實(shí)現(xiàn)從學(xué)生到工程技術(shù)人員的過(guò)渡設(shè)計(jì)。
共計(jì)安排15周時(shí)間：
第 1～2 周 實(shí)習(xí)調(diào)研、查閱資料第5～13周 上機(jī)運(yùn)算（繪圖）
第 3～4 周 方案確定、開題報(bào)告第5～13周 設(shè)計(jì)計(jì)算（實(shí)驗(yàn)）
第 14 周 撰寫說(shuō)明書（論文） 第 15 周 上交設(shè)計(jì)（論文）
指導(dǎo)教師簽名： 教研室意見： 日期：2009.1
學(xué)院（系）畢業(yè)論文（設(shè)計(jì)）領(lǐng)導(dǎo)小組意見：
組長(zhǎng)簽字： 日期：
教務(wù)處制表
大連水產(chǎn)學(xué)院
畢業(yè)設(shè)計(jì)(論文)任務(wù)書
2009屆 職業(yè)技術(shù)學(xué)院 機(jī)械設(shè)計(jì)制造及其自動(dòng)化專業(yè)
題目： 定位支座數(shù)控加工夾具設(shè)計(jì)
子題：
學(xué)生姓名： 江本恒 班 級(jí)： 機(jī)自07-1
指導(dǎo)教師(簽章)： 李剛 職稱（學(xué)位）： 講師
所在教研室： 數(shù)控教研室
專業(yè)負(fù)責(zé)人(簽章)：
下達(dá)日期：2009 年 2月26日 完成日期：2009 年 6月13日
題目性質(zhì)
真實(shí)
題目類型
設(shè)計(jì)
題目來(lái)源
生產(chǎn)
課題簡(jiǎn)介
定位支座數(shù)控加工夾具設(shè)計(jì)。它是在生產(chǎn)與實(shí)踐教學(xué)模式的基礎(chǔ)上結(jié)合企業(yè)的實(shí)際情況針對(duì)一個(gè)中等復(fù)雜零件的機(jī)械加工工藝規(guī)程的畢業(yè)設(shè)計(jì)綜合性，使用性，和實(shí)踐性較強(qiáng)的設(shè)計(jì)過(guò)程
具體任務(wù)、內(nèi)容及要求（包括設(shè)計(jì)計(jì)算、實(shí)驗(yàn)分析、繪圖質(zhì)量各類圖紙張數(shù)、外文翻譯及撰寫外文摘要等要求）
設(shè)計(jì)條件和原始數(shù)據(jù)：
1、定位支座樣品1件；
2、機(jī)床加工成型；
3、產(chǎn)量500件（小批量）；
4. 機(jī)械加工工藝卡片一套；
5 零件圖一張。
設(shè)計(jì)的主要內(nèi)容及要求：
1、繪制夾具的零件圖和裝配圖；
2、繪制夾具結(jié)構(gòu)總裝草圖；
3、用CAD軟件繪制夾具的總裝配圖；
4、重要夾具零件圖和造型；
5、編寫夾具中一個(gè)成型零件的加工工藝卡片；
6、編寫一本不少于10000字的設(shè)計(jì)說(shuō)明書；
7、撰寫1500字以上的文獻(xiàn)綜述；
8、獨(dú)立翻譯一篇3000字以上、與課題相關(guān)的外文參考文獻(xiàn)；
9、除夾具草圖外，其余所有設(shè)計(jì)內(nèi)容均由計(jì)算機(jī)及相應(yīng)軟件形成電子文檔并打印和手工繪制；
10、繪圖量不少于折成A0號(hào)圖紙4張；
11、參考文獻(xiàn)不少于10篇。
確定選題、撰寫開題報(bào)告、調(diào)研
第1~2周
編寫設(shè)計(jì)說(shuō)明書
第14周
撰寫文獻(xiàn)綜述、翻譯外文文獻(xiàn)、確定總體方案
第3~4周
審閱畢業(yè)設(shè)計(jì)
第15周
設(shè)計(jì)計(jì)算、作圖等
第5~13周
畢業(yè)答辯
第16周
畢業(yè)論文（設(shè)計(jì)）領(lǐng)導(dǎo)小組長(zhǎng)簽章：
教務(wù)處制表
781型銑邊機(jī)維修
跳針是銑邊機(jī)經(jīng)常出現(xiàn)的故障，跳針可分為：下勾線盤勾線跳針和機(jī)針未勾上縫線跳針。
??? 下勾線盤勾線跳針
如何判斷是下勾線盤勾線跳針呢？在操作中上勾線鉤勾住機(jī)針線環(huán)，機(jī)針帶著縫線下降，下勾線盤勾線后，這時(shí)縫料上面或線鉤上有線環(huán)，這都是因?yàn)橄鹿淳€盤鉤頭沒有勾住機(jī)針上的線環(huán)所造成的跳針。調(diào)整時(shí)機(jī)針高度的定位標(biāo)準(zhǔn)是：機(jī)針在上死點(diǎn)時(shí)機(jī)針尖距離針板上平面16mm。下勾線盤的勾線時(shí)間為：機(jī)針在第一圈下降至下死點(diǎn)后，向上回升1.3 mm時(shí)，下勾線盤鉤頭應(yīng)該到達(dá)機(jī)針凹面中心（圖1），鉤頭與機(jī)針凹面的間隙為零。在這里要強(qiáng)調(diào)的是通常情況下機(jī)針回升1.3 mm時(shí)，下勾線盤鉤頭應(yīng)到達(dá)機(jī)針中心。這是因?yàn)獒槜U下降至針板時(shí)封針被擋在了針板上方（圖2、3），機(jī)針孔向操作者的一面打開，針孔內(nèi)的縫線失去了保護(hù)，機(jī)針從下死點(diǎn)稍微向上回升，機(jī)針孔內(nèi)的縫線失去拉力很容易形成線環(huán)，如果下勾線盤勾線時(shí)間略遲，在勾線之前縫線就容易從機(jī)針孔內(nèi)脫出或線環(huán)過(guò)大扭曲變形造成跳針。也可將下勾線盤勾線時(shí)間稍微提前。
?
??? 機(jī)針勾線跳針
機(jī)針勾線跳針表現(xiàn)為：在縫制面料的正面一針或幾針沒有線跡，或縫了幾針后機(jī)針再也帶不上縫線。要排除該故障，首先應(yīng)對(duì)機(jī)器的下送線機(jī)構(gòu)有所了解，弄清它的工作原理、時(shí)間相位。
機(jī)針在第一圈的下死點(diǎn)，當(dāng)回升1.3 mm時(shí)下勾線盤鉤頭勾住機(jī)針線環(huán)，并繼續(xù)旋轉(zhuǎn)擴(kuò)大線環(huán)（圖4、5），依次將縫線送入下送線指內(nèi)→緊線鉤中→夾線器中。與此同時(shí)，下送線鉤從前行程末端，向后（操作者）擦著縫線運(yùn)動(dòng)到后行程末端，然后勾著縫線再運(yùn)動(dòng)到前行程末端停止。第二圈沒有帶縫線的機(jī)針下降至下死點(diǎn)后開始回升，此時(shí)下送線指推著縫線同步向左前方圍著機(jī)針作曲線運(yùn)動(dòng)，下送線指和機(jī)針相遇時(shí)的距離為0.1 mm（圖4），在機(jī)針上升至封針封住機(jī)針孔后，下送線指開始回退，緊線鉤松線，夾線器打開。
要保證機(jī)針能順利地勾上縫線，那么縫線每次都應(yīng)在下送線鉤前、下送線指內(nèi)、夾線器中、緊線鉤內(nèi)。重要的是下送線鉤必須每次把縫線勾住，這就要求必須調(diào)整好它們的時(shí)間相位。調(diào)整時(shí)最好用觀察針板（把針板右邊磨掉一部分），以便于觀察下勾線盤勾線、下送線鉤勾線和送線、送線指的送線情況。下送線鉤在機(jī)針前行程末端時(shí)的標(biāo)準(zhǔn)位置是：下送線鉤和機(jī)針的距離是2.5 mm。下送線鉤在左面的標(biāo)準(zhǔn)位置是：下送線鉤鉤頭超出機(jī)針左邊0.3 mm。旋松下送線鉤座固定螺釘進(jìn)行調(diào)節(jié)（圖6）。下送線鉤的高度距離針板下面0.3 mm（圖7），旋松下送線鉤緊固螺釘進(jìn)行調(diào)節(jié)。為什么要距離針板這么近，主要是因?yàn)橄滤途€鉤越高，下送線鉤就越容易擦著縫線向后運(yùn)動(dòng)，返回時(shí)就能勾住縫線。機(jī)針勾線跳針，絕大部分都是由于下送線鉤沒有勾住縫線所造成的。下送線鉤的弧型背面擦著縫線向后運(yùn)動(dòng)，然后勾上縫線送向前行程末端，這一點(diǎn)尤為重要。還要注意的一點(diǎn)是，在縫制過(guò)程中出現(xiàn)斷針，在排除故障前，最好先檢查下送線鉤弧型背面有無(wú)劃傷，如果下送線鉤弧型背面有毛刺，那么當(dāng)下送線鉤向后運(yùn)動(dòng)，縫線就不可能順暢地滑入下送線鉤的前面，下送線鉤也就沒有勾住縫線，跳針也就很自然的事。
夾線器調(diào)整不當(dāng)，也會(huì)引起機(jī)針勾線時(shí)偶爾跳針。它的時(shí)間相位是：在第一圈下勾線盤勾住機(jī)針線環(huán)旋轉(zhuǎn)擴(kuò)大，緊線鉤和夾線器的左半邊在下勾線盤鉤頭前8 mm左右，開始進(jìn)入下勾線盤內(nèi)。在第二圈當(dāng)回升的機(jī)針勾住縫線并被封針封住針孔后，緊線鉤松線，夾線器打開。調(diào)整方法是：旋松夾線器控制凸輪上的兩顆緊固螺釘進(jìn)行調(diào)整（圖8），但調(diào)整后還應(yīng)觀察下送線鉤的送線時(shí)間相位是否正確。這是因?yàn)橄滤途€鉤控制凸輪和夾線器控制凸輪是連接在一起的，如果下送線鉤時(shí)間相位受到影響，就應(yīng)拆下下勾線盤，在夾線器控制凸輪槽內(nèi)用扳手旋松兩顆緊固螺釘，用六方扳手帶著其中一顆螺釘在槽內(nèi)滑動(dòng)，從而改變下送線鉤的時(shí)間相位。
??? 末尾線頭長(zhǎng)
理想的末尾線頭長(zhǎng)是10cm左右，超過(guò)就可以認(rèn)為末尾線頭過(guò)長(zhǎng)，造成縫線浪費(fèi)。線頭長(zhǎng)的主要原因是下送線鉤調(diào)整的位置不當(dāng)和下勾線盤沒有調(diào)到標(biāo)準(zhǔn)位置。總之要想末尾線頭短，下送線鉤寧高勿低，下勾線盤勾線時(shí)間寧早勿遲。
??? 縫線散開、起絲和斷線
縫線起絲主要是由于下送線指送線和夾線器松線的時(shí)間過(guò)早所致。調(diào)整方法是調(diào)整它們各自的控制凸輪的時(shí)間相位。標(biāo)準(zhǔn)的時(shí)間相位如圖4，機(jī)針從下死點(diǎn)回升，下送線指同步送線，封針封住機(jī)針孔后，送線指開始回退，夾線器開始張開松線。另外還可以通過(guò)夾線器調(diào)節(jié)螺釘，改變縫線的張力大小（圖5），下勾線盤鉤頭內(nèi)若卡上縫線或鉤頭內(nèi)小軸承運(yùn)轉(zhuǎn)不靈活等均會(huì)引起縫線起絲和斷線（圖9）。
挑線鉤的安裝調(diào)整不當(dāng)也會(huì)引起縫線起絲和斷線。挑線鉤的標(biāo)準(zhǔn)時(shí)間相位是：下勾線盤鉤頭勾住機(jī)針線環(huán)時(shí)，挑線鉤應(yīng)挑出夾線器中間的縫線（圖10），如不正確，調(diào)整它的控制凸輪即可。另外還應(yīng)注意挑線鉤的背面一定要光滑，否則縫線就不能進(jìn)入挑線鉤內(nèi)，夾線器中的縫線也就無(wú)法被挑出。另外，每次開始縫紉時(shí)縫線的長(zhǎng)度不要超過(guò)90cm，超過(guò)了下線盤的容線量也會(huì)出現(xiàn)縫線起絲或斷線。
??? 機(jī)針掛紗
首先應(yīng)檢查封針尖是否損壞或磨損，機(jī)針是否彎曲，封針位置是否正確。封針的標(biāo)準(zhǔn)位置是：當(dāng)機(jī)針在上死點(diǎn)時(shí)，封針應(yīng)封閉機(jī)針開口，封針尖距機(jī)針孔下端0.8~1.2 mm，封針尖與機(jī)針必須貼合。另外，夾線器松線時(shí)間過(guò)遲、線太緊也會(huì)造成機(jī)針變形掛紗。
??? 珠點(diǎn)調(diào)節(jié)手柄上下晃動(dòng)
首先應(yīng)檢查氣缸有無(wú)串氣現(xiàn)象（圖11），珠點(diǎn)正反按鈕、珠點(diǎn)調(diào)節(jié)按鈕有無(wú)接觸不良，檢查電磁閥動(dòng)作是否靈活。如氣缸串氣沒有配件，應(yīng)在氣缸橡膠圈槽內(nèi)纏上兩三圈生料帶即可。如電磁閥線圈壞了只要換同樣型號(hào)的線圈。
??? 針碼和珠點(diǎn)故障
調(diào)節(jié)針碼和珠點(diǎn)大小時(shí)一定要先按下它們的調(diào)節(jié)按鈕，然后再調(diào)整，調(diào)好后再按回按鈕。如果不按按鈕直接調(diào)，不僅調(diào)不動(dòng)，還會(huì)使調(diào)節(jié)絲杠滑絲，造成針碼和珠點(diǎn)無(wú)法控制；如果調(diào)好后忘了按回按鈕，針碼會(huì)亂，無(wú)法操作。珠點(diǎn)正反面大小不一致時(shí)，應(yīng)旋松調(diào)節(jié)壓塊上的兩顆緊固螺釘反復(fù)調(diào)節(jié)（圖11）。
機(jī)針的停車位是靠同步器來(lái)定位的。機(jī)針的標(biāo)準(zhǔn)停車位是：在第二圈末端，機(jī)針下降至針板上面10 mm時(shí)應(yīng)停車，此時(shí)上勾線鉤尾部距機(jī)針約10~14 mm。因珠邊機(jī)運(yùn)轉(zhuǎn)兩圈完成一個(gè)工作循環(huán)，故調(diào)整同步器一定要認(rèn)真觀察。調(diào)整不好，要么機(jī)針停在了第一圈末端，造成無(wú)法縫紉；要么停針位過(guò)高或過(guò)低，造成穿線時(shí)封針打不開或面料無(wú)法放入。同步器和主軸之間的皮帶張力要略緊。
781-type aircraft maintenance
Jump-edge machine needle is often the fault, jumping needle can be divided into: The hook-hook-line-and-jump-hook did not jump on the suture needle.
???? The hook-hook-line-dancing
How to determine the next hook-hook-line-dancing? ? In operation Shanggou line hook-Zhenxian Gouzhu Central, with a suture needle-drop, the next line hook-hook line, then slit the above material on the hook or cable lines, Central, this is because the next line hook-hook Gouzhu not the first machine needle on the Central Line caused by the needle jumped. Time-adjusted high degree of targeting criteria are: machine needles on the dead point in time to board plane needle tips from 16 mm. The hook-line time for the hook line: machine needles in the first lap down to the next point after death, upward rebound 1.3 mm, the hook-hook the first line should reach the concave center-pin (Figure 1), and the first hook - Needle concave gap is zero. Here want to emphasize is usually under-recovery of 1.3 mm, the hook-hook the first line should reach the centre of needles. This is because the needle-to-pin-drop when the needle was blocked in the closure of the side-board (2,3), the operator of the pinhole to the open side, the suture needle marks in the loss of protection, machine needles from the Died at a slight upward rebound of the suture needle marks Rally very easily lose a Central Line, if the hook-hook-line time slightly late in the Application List system on line before the suture needle marks, easily emerge from the plane or the Central Line Big jump-twisted cause. May also be under-hook-hook line slightly ahead of time.
????
???? Machine hook-line-dancing
Machine hook-line-dancing performance: sewing fabric in the front of a needle or a few needles without trace, or a few stitches after the machine-needle can not take on the suture. The failure to exclude, first of all machines should send the next line agencies understand, understand its working principles, time phase.
Machine needle in the first lap of death, when the rebound of 1.3 mm topical hook-hook-head Gouzhu Zhenxian Central, and will continue to expand the revolving line Central (4,5), followed by sutures will be sent into the line that → within the tight line hook in the line-in → folder. At the same time, the next line hook sent to the end of the previous trip, backward (the operator) Cazhe suture campaign to end after the trip, and then to suture Gouzhao campaign to stop before the trip ends. The second round of the machine without suture needle drop to the next point after the death began to rise, this time sending the suture line that pushed simultaneously around the left front of a machine needle movement, the delivery of that plane and meet at the needle The distance is 0.1 mm (Figure 4), rose to the closure of needle-shut-pinhole, sent under the line that started the Back, tight line hook-line, the line to open folder.
?????To ensure a smooth machine-stitching on the hook, then the next should be sent to each suture line hook, line refers to the next delivery, in-line folder, within the tight line hook. The important thing is to be sent each time the line hook Gouzhu suture, which requires them to be a good time for adjustment phase. Adjustment of the best observed using acupuncture board (the board the right-Modiao part), in order to observe the hook-line hook line, sending the hook-hook line and line delivery, the delivery of that line in delivery. The sending-line hook in the machine before the trip at the end of the standard position: the delivery line hook-and-distance is 2.5 mm. The delivery of the left hook in the standard position: under Gougou sent to the first line beyond the left-pin 0.3 mm. Rotary Matsushita sent on a fixed line hook screw adjusted (6). The line hook sent to the high-plate distance below 0.3 mm (Figure 7), Rotary Matsushita sent line hook fastening screws to regulate. Why should distance needle plate so close, mainly because of higher delivery line hook, line hook sent under the easier it is Cazhuo suture backward movement, will be able to return Gouzhu sutures. Machine-jump-hook line, the vast majority are due to the delivery line hook Gouzhu not caused by the sutures. The line hook sent to the back of the arc Cazhao suture backward movement, and then hook on the end of suture sent forward itinerary This is especially important. We must pay attention to the fact that, in the process of sewing Duanzhen, troubleshooting, best to check under the Arc hook sent to the back line there scratches, if sent to the back of a curved line hook Burr, then the present Hook sent back line movement, it is impossible to suture smoothly down the line hook sent under the front of the line hook will not send Gouzhu sutures, jump-it is very natural.
?? Folder line-adjusted properly, will lead to needle-line when the occasional jump hook needle. It is time to phase: the first lap under hook-line-Gouzhu Zhenxian Central rotating expand, tight line hook and line for folder on the left half of the next line hook-hook before the first around 8 mm, under the Application List system has begun to enter the line - . When the rebound in the second round of machine-Gouzhu suture needle was sealed shut after the pinhole, tight line hook-line, the line to open folder. Adjustment method is: Screw-line control cam folder on the two fastening screw adjustment (8), but should also be adjusted under the observation of the delivery line hook-time delivery phase is correct. This is because under the delivery line hook control cam and cam folder of control is linked to, if the delivery time line hook phase be affected, should be removed under the hook-line, the Line of Control in the folder Cam bed with wrench Screw-two fastening screws, which used the six-party wrench with a screw in the sliding bed, to change the delivery time line hook phase.
?
???? At the end of a long Xiantou
At the end of a long Xiantou ideal is about 10 cm, more than at the end of Xiantou on it that is too long, resulting in a waste of stitches. Xiantou long is the main reason for the adjustment of the delivery line hook improperly positioned under hook line and not transferred to the standard set position. In short to end Xiantou short, hook-line delivery of high not low, the hook-line hook-line time not later than early.
???? Suture spread, and disconnected from the wire
Silk sutures from the mainly due to the delivery of that line and sent folder line with the time-lines caused by premature. Adjustment method is to adjust their respective control cam time phase. Standard time phase in Figure 4, needle-point rise from the dead, sent under the simultaneous delivery of that line, closed-shut-pinhole, sent back to the beginning of that withdrawal, the folder open-line start-line. It also can adjust screw-line folder and change the size of the tension suture (5), the hook-line hook in the first stitches on the card if the head of the small hook or bearing operation does not lead to flexibility, all from the silk sutures And disconnected (9).
Pick the hook line will lead to improper installation of adjustment from the silk sutures and disconnected. Pick-hook phase is the standard time: The hook-line hook for the first Gouzhu Zhenxian Central, the pick-hook line folder should be singled out for the middle of the stitches (10), if not correct, adjust its control cam that is, Can be. It should also pay attention to the back of the pick-hook must be smooth, it will not be able to enter the pick suture line hook, line-folder in the suture it can not be singled out. In addition, each started sewing thread when the length of no more than 90 cm, set off the assembly line more than the capacity of line will also appear from the silk sutures or disconnected.
?
???? Machine-linked yarn
Should first check whether the closure needle damage or wear, whether bending machine needle, needle closure position is correct. The closure-standard position: When the machine needle in the dead spots, the closure of acupuncture needles should be closed openings, the closure of the needle marks from the bottom of 0.8 ~ 1.2 mm, with the closure of acupuncture needle to a paste. In addition, the folder line for late-line time, the lines too tight will cause deformation of needle pegged yarn.
???? - Point adjustment handle shaking from top to bottom
Should first check whether string gas in the cylinder (11), the positive and negative points-button, the button-point adjustment whether connection is bad, check whether the electromagnetic valve action flexible. If no gas cylinder string parts, rubber ring in the cylinder tank Chanshang February 3 laps to bring raw material. Such as electromagnetic coil valve bad for the same model as long as the coil.
?
???? Code-and-points of failure
Regulation needle-point code and the size must first press the button on their conditioning and then adjusted, for good and then click the back button. If the button is not directly transferred, not only for fixed, but also to adjust screw slippery silk, and a pin-point code can not control if good-by to forget after button, pin code will be chaotic, can not operate. - Point size is not negative, they should spin-conditioning Press tighten screws on the two repeatedly regulation (11).
Machine-parking spaces is to rely on sync with the positioning. Machine-standard parking spaces is: the end of the second lap, machine needles dropped to 10 mm above-board should be stopping, at this time Shanggou line hook from the tail-plane about 10 ~ 14 mm. By-side machines running two laps completed a work cycle, the adjustment synchronizer must seriously observe. Adjusted well, either machine needle stopped at the end of the first lap, causing no sewing; either stop-bit too high or too low, causing threading needles trying to open or closed when not Add to fabrics. And spindle synchronization between the belt tension Chamber tight.
8