【正文】
he continuous transformation, the innovation provides a bigger space, but also must take the original product as the foundation, the increase automation, integrated or the systematized function. Must pletely change the present industry sewing machine basic organization type the possibility not to be big, even if likes the cyclical sewing machine such with the electronic control technology substitution cam gear, that also is only the control mode change, achieved the simplification organization the goal, certainly not radically changes likes the nail catcher machine, make eyes machine and the set of knot machine basic function structure type. The present paper mainly is mainly to one kind of sewing machine set of knot machine, carries on a series of designs to its nose structure and the processing craft. And processes the cutting tool to the sewing machine nose material choice the model, the material quality carries on the analysis confirmation, draws the type with AUTCAD the machined surface, and designs the jig the reliability, the feasibility, finally designs the good processing craft, according to processes the craft to choose the origin of coordinates, carries on the numerical control programming with the FUNIC system to its craft. Finally will process the nose, passing will examine, the assembly, after the quality testing, will determine the processing the feasibility..Keywords: Structural design; Processing craft FANUC system; Numerical control programming第1章 緒論 18世紀歐洲掀起工業(yè)革命的高潮,紡織業(yè)實現(xiàn)了機械化的大生產,隨之也對縫制機械化提出了迫切的要求,各種縫制機械也應運而生。數(shù)控機床是綜合應用了計算機技術、自動控制、精密測量和機床設計等技術而發(fā)展起來的,采用數(shù)字化信息對機床運動及其加工過程進行自動控制的自動化機床。這些豐富的信號和編程指令便于用戶編制機床側PMC控制程序,而且增加了編程的靈活性。而專用刀具一般根據加工工件的形狀、尺寸、技術要求進行專門的設計與制造。按銑刀的齒背形式可將銑刀分為尖齒銑刀和鏟齒銑刀兩大類。刀具材料越硬,其耐磨性越好,但由于切削條件較復雜,材料的耐磨性還決定于它的化學成分和金相組織的穩(wěn)定性。其強度和韌性是現(xiàn)有刀具材料中最高的。與傳統(tǒng)的加工方法相比,數(shù)控加工對刀具的要求更高。 b) 二.切削用量的確定 切削用量包括主軸轉速(切削速度)、背吃刀量、進給量。在數(shù)控加工前,要將機床的運動過程、零件的工藝過程、刀具的形狀、切削用量和走刀路線等都編入程序,這就要求程序設計人員具有多方面的知識基礎。調整好機床并調用該程序后,就可以加工出符合圖紙要求的零件。在調機時,必須要注意下刀的速度,要慢慢下刀,時刻觀察刀具與零件的距離,以及對照程序的Z軸數(shù)字,來判斷是否下刀安全,并且在加工的同時,應檢查刀具長度補償?shù)臄?shù)值是否測量準確,這樣有利于保護刀具和保證零件的質量。半年多來,李教授不僅在學業(yè)上給我以精心指導,同時還在思想、生活上給我以無微不至的關懷,在此謹向李老師致以誠摯的謝意和崇高的敬意。在手動編程中,用到的主要指令是G43長度補償指令,這個在手動編程中,占很重要的作用,關系到刀具在加工面的安全問題和零件的尺寸精確度很大的關系。此外,在選擇和決定加工內容時,也要考慮生產批量、生產周期、工序間周轉情況等等。 3)進給量(進給速度)f(mm/min或mm/r)進給量是數(shù)控機床切削用量中的重要參數(shù),主要根據零件的加工精度和表面粗糙度要求以及刀具、工件的材料性質選取。 P類相當于我國原鎢鈦鉆類,主要成分為WC十TiC十Co,代號為YT。因此在選用時一定要綜合考慮。加工精度可達IT6~~。采用夾具裝夾工件,易于保證加工精度、縮短輔助時間、提高生產效率、減輕工人勞動強度。FANUC對自身的系統(tǒng)采用比較好的保護電路。在政府的資助下,日本開始生產廉價的家用縫紉機,銷往世界各國,年產10萬臺左右。要徹底改變目前工業(yè)縫