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面包屑導航結束 --> <!-- 頁面標題開始 --> <div id="n1l1njb9b" class="title"> <h3><a>分析數控編程中的零件加工工藝及平面凸輪的加工<small></small></a></h3> </div> <!-- 頁面標題結束 --> <hr class="featurette-divider"> <!-- 中部開始 --> <div id="n1l1njb9b" class="container"> <!-- 正文 --> <div id="n1l1njb9b" class="lead" id="print"> <p> <span style="text-indent: 21pt; font-family: 宋體;">隨著機械不斷朝著高速精密</span><span style="text-indent: 21pt;"> </span><span style="text-indent: 21pt; font-family: 宋體;">自動化方向發展，對凸輪機構的轉速和精度也提出了更高的要求，因此利用計算機輔助設計和數控機床加工是很有必要的</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">一</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">數控編程中的零件加工工藝分析</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">1. </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">數控加工工藝概述</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">無論是手工編程還是自動編程，在編程前都要對所加工的零件進行工藝分析，擬訂工藝方案，選擇合適的刀具，確定切削用量在編程中，對一些工藝問題（如對刀點，加工路線等）也需要作一些處理</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">因此，數控編程的工藝處理是一項十分重要的工作</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">1</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）數控加工的基本特點：</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">數控加工的工序內容比普通機加工的工序內容復雜</span> <span style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">數控機床加工程序的編制比普通機床工藝規程的編制復雜</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">2</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）數控加工工藝的主要內容：</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">選擇適合在數控上加工的零件，確定工序內容</span> <span style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">分析加工零件的圖紙，明確加工內容及技術要求，確定加工方案，制定數控加工路線</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">調整數控加工工序的程序分配數控加工中的容差</span> <span style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">處理數控機床上部分工藝指令</span></p> <p class="MsoNormal" align="left" style="margin: 3.75pt 0cm; text-indent: 21pt; line-height: 13.5pt;"><span lang="EN-US" style="font-family: Tahoma;">2. </span><span style="font-family: 宋體;">常用數控加工辦法</span><span lang="EN-US" style="font-family: Tahoma;"><o:p></o:p></span></p> <p class="MsoNormal" align="left" style="margin: 3.75pt 0cm; text-indent: 21pt; line-height: 13.5pt;"><span style="font-family: 宋體;">（</span><span lang="EN-US" style="font-family: Tahoma;">1</span><span style="font-family: 宋體;">）平面孔系零件</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">常用點位</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">直線操控數控機床（如數控鉆床）來加工，挑選技術道路時，主要思考加工精度和加工功率兩個原則</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">（</span><span lang="EN-US" style="font-family: Tahoma;">2</span><span style="font-family: 宋體;">）旋轉體類零件</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">常用數控車床或磨床加工</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">思考加工功率：在車床上加工時，一般加工余量大，有必要合理安排粗加工道路，以進步加工功率</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">思考刀尖強度：數控車床上常用到低強度刀具加工細微凹槽</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">選用斜向進刀，不宜崩刃</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">（</span><span lang="EN-US" style="font-family: Tahoma;">3</span><span style="font-family: 宋體;">）平面概括零件</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">常用數控銑床加工</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">應留意：</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">切入與切出方向操控：徑向切入，工件外表留有凹坑；切向切入</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">切出，工件外表潤滑</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">一次迫臨辦法挑選：只具有直線和圓弧插補功能的數控機床在加工不規則曲線概括時，需要用細小直線段或圓弧段去迫臨被加工概括，迫臨時，大概使工件差錯在合格范圍一起程序段的數量少為佳</span><span lang="EN-US" style="font-family: Tahoma;"><o:p></o:p></span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">3. </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">對零件圖紙進行數控加工工藝性分析</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">1</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）尺寸標注應符合數控加工的特點</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">在數控編程中，所有點</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">線</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">面的尺寸和位置都是以編程原點為基準的</span> <span style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">零件圖樣上最好直接給出坐標尺寸，或盡量以同一基準引注尺寸</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">2</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）零件圖的完整性與正確性分析</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">在編程時，編程人員必須充分掌握構成零件輪廓的幾何要素參數及各幾何要素間的關系</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">3</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）零件技術要求分析</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">零件的技術要求主要指尺寸精度</span> <span style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">形狀精度</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">位置精度</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">表面粗糙度及熱處理等，這些要求在保證零件使用性能的前提下，應經濟合理</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">4</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）零件材料分析</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">在滿足零件功能的前提下，應選用廉價切削性能好的材料；材料選擇應立足國內，不要輕易選擇貴重或緊缺的材料</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">5</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）定位基準選擇</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">在數控加工中，加工工序往往較集中，以同一基準定位十分重要</span><span lang="EN-US">,</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">有時需要設置輔助基準</span><span lang="EN-US">,</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">特別是正</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">反兩面都采用數控加工的零件，其工藝基準的統一是十分必要的</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">4. </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">數控加工工藝路線的設計</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">根據數控加工的特點，數控加工工序的劃分一般可按下列方法進行：（</span><span lang="EN-US">1</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）以一次安裝</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">加工作為一道工序</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">這種方法適合于加工內容較少的零件，加工完后就能達到待檢狀態</span> <span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span lang="EN-US">2</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）以同一把刀具加工的內容劃分工序</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">但程序不宜太長，一道工序的內容也不宜太多（</span><span lang="EN-US">3</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）以加工部位劃分工序</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span lang="EN-US">4</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）以粗</span> <span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">精加工劃分工序</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">一般來說，凡要進行粗</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">精加工的過程，都要將工序分開</span></p> <p class="MsoNormal" align="left" style="margin: 3.75pt 0cm; text-indent: 21pt; line-height: 13.5pt;"><span style="font-family: 宋體;">二</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">平面凸輪的加工</span><span lang="EN-US" style="font-family: Tahoma;"><o:p></o:p></span></p> <p class="MsoNormal" align="left" style="margin: 3.75pt 0cm; text-indent: 21pt; line-height: 13.5pt;"><span style="font-family: 宋體;">目前，凸輪組織已成為許多高速</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">高效</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">高精度自動機</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">半自動機和自動生產線中不行短少的要害部件，作為凸輪組織中的首要零件</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">凸輪的加工精度就顯得尤為重要，如何加工出符合精度要求的凸輪？下面以一批平面凸輪（如圖</span><span lang="EN-US" style="font-family: Tahoma;">1 </span><span style="font-family: 宋體;">所示）的加工為例予以介紹</span><span lang="EN-US" style="font-family: Tahoma;"><o:p></o:p></span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US"><img src="/upload/images/201407/14065827033553.jpg" alt="" /><br /> <!--[endif]--></span></p> <p class="MsoNormal" align="left" style="margin: 3.75pt 0cm; text-indent: 21pt; line-height: 13.5pt;"><span lang="EN-US" style="font-family: Tahoma;">1. </span><span style="font-family: 宋體;">平面凸輪零件概括圖</span><span lang="EN-US" style="font-family: Tahoma;"><o:p></o:p></span></p> <p class="MsoNormal" align="left" style="margin: 3.75pt 0cm; text-indent: 21pt; line-height: 13.5pt;"><span lang="EN-US" style="font-family: Tahoma;">2. </span><span style="font-family: 宋體;">技術分析</span><span lang="EN-US" style="font-family: Tahoma;"><o:p></o:p></span></p> <p class="MsoNormal" align="left" style="margin: 3.75pt 0cm; text-indent: 21pt; line-height: 13.5pt;"><span style="font-family: 宋體;">（</span><span lang="EN-US" style="font-family: Tahoma;">1</span><span style="font-family: 宋體;">）凸輪曲線分別由幾段圓弧構成，內孔為規劃基準，故取內孔和一個端面為首要定位面，在銜接孔</span><span lang="EN-US" style="font-family: Tahoma;"> 20 </span><span style="font-family: 宋體;">的一個孔內增加削邊銷，在端面用螺母墊圈壓緊</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">因孔為規劃和定位基準，所以對刀點選在孔中間線與端面的交點上，這樣很簡單斷定刀具中間與零件的相對位置</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">（</span><span lang="EN-US" style="font-family: Tahoma;">2</span><span style="font-family: 宋體;">）中間孔與銜接孔的加工</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">該凸輪零件的中間孔為</span><span lang="EN-US" style="font-family: Tahoma;">20</span><span style="font-family: 宋體;">，是個規劃定位基準，要與凸輪軸合作，其尺度精度求較高，銜接孔其精度與中間孔相同，故都用鉆</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">擴</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">鉸</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">精鉸的加工計劃（</span><span lang="EN-US" style="font-family: Tahoma;">3</span><span style="font-family: 宋體;">）凸輪概括加工</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">因為該凸輪概括是由幾段圓弧構成，普通機床難以對其加工，可選用數控銑床或線切割機床對其加工</span><span style="font-family: Tahoma;"> </span><span style="font-family: 宋體;">因為選用線切割機床對其加工，雖然能確保尺度精度，可是該辦法所需要的時間長，加工成本高，選用數控銑床對其加工，不但能確保尺度精度，并且加工效率高，故選用數控銑床來加工該凸輪概括</span><span lang="EN-US" style="font-family: Tahoma;"><o:p></o:p></span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">3. </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">加工順序</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">整個凸輪零件的加工順序的擬定要按照</span> <span style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">基面先行，先精后粗</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">的原則確定</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">因此要首先加工用做定位基準的</span><span lang="EN-US"> A</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">端面及其與之平行的另一面</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">其次加工作為定位和設計基準的內孔，最后進行凸輪輪廓的銑削加工</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">加工步驟：（</span><span lang="EN-US">1</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）坯料選擇</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">選用</span><span lang="EN-US">100X100X25 </span><span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">的</span><span lang="EN-US">HT200 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">的板料作為加工對象（</span><span lang="EN-US">2</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）兩平行端面的加工</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">選用平面磨床，以互為基準的方式將坯料加工到圖示尺寸</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">（</span><span lang="EN-US">3</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">）中心孔及連接孔的加工</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">用兩塊</span><span lang="EN-US"> 40X40X20 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">的平行墊鐵將工件墊起，以</span><span lang="EN-US"> A</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">平面為定位面，根據工件的基準邊，用百分表將工件找正后用壓板將工件壓緊</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">用偏心碰觸尋邊器對刀，將零件的基準設為工件零點，工件上表面為</span><span lang="EN-US"> Z</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">向</span><span lang="EN-US">0 </span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">（</span><span lang="EN-US">4</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）零件輪廓銑削加工</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">4. </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">數學處理</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">該凸輪為阿基米德螺旋線凸輪，基圓直徑為</span><span lang="EN-US"> 40</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">；左邊凸輪每旋轉</span><span lang="EN-US">10 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">度升程為</span><span lang="EN-US"> 1 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">毫米，升程誤差值每</span><span lang="EN-US">10 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">度不能超過</span><span lang="EN-US">0.1 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">毫米；右邊凸輪每旋轉</span><span lang="EN-US"> 10 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">度升程為</span><span lang="EN-US"> 2 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">毫米，升程誤差值每</span><span lang="EN-US"> 10 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">度不能超過</span><span lang="EN-US">0.1 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">毫米</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">根據加工要求，現將兩邊凸輪輪廓分解成由</span><span lang="EN-US"> 18 </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">段圓弧段組成，并計算出各點坐標值</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">用公式一：</span><span lang="EN-US"> X (t)= (20+0.1* (t- 90))*cos (t) Y (t)=(20+0.1*(t- 90))*s in (t)</span><span style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">和用公式二：</span><span lang="EN-US"> X(t)= (20+0.2*(90- t))*cos (t) Y(t)=(20+0.2*(90- t))*s in(t)</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">計算出的各點坐標值為</span><span lang="EN-US">(</span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">如表</span><span lang="EN-US"> 1)</span><span style="font-family: 宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">：</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US"><img src="/upload/images/201407/14065827138743.jpg" alt="" /><br /> <!--[endif]--></span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">5. </span><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">凸輪的加工程序</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">凸輪加工的程序及程序說明如下：</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">O0001</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N10 G90G54G00Z100.000</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N20 S1000M03</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N30 X0.000Y0.000Z100.000</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N40 X58.533Y- 24.808</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N50 Z10.000</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N60 G01Z0.000F100</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N70 X56.277Y- 34.550F800</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N80 G02X48.791Y- 22.552I2.256J9.742</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N90 G03X49.757Y- 5.161I- 49.525J11.471F1000</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N100 G03X44.396Y11.792I- 46.622J - 5.418</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N110 G03X32.454Y25.637I- 37.518J - 20.288</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N120 G03X14.887Y32.872I- 22.795J - 30.406</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N130 G01X14.874Y32.874</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N140 G03X- 1.288Y30.961I- 4.406J - 32.016</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N150 G03X- 12.505Y30.499I- 4.326J - 31.369</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N160 G01X- 12.573Y30.484</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N170 G03X- 25.947Y24.088I7.612J - 33.097</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N180 G03X- 35.295Y13.065I22.333J - 28.414</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N190 G03X- 39.698Y- 0.368I33.608J - 18.455</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N200 G03X- 39.120Y- 14.243I39.988J - 5.282</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N210 G03X- 34.076Y- 26.964I41.216J8.981</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N220 G03X- 25.441Y- 37.339I37.792J22.671</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N230 G03X- 14.223Y- 44.618I30.104J34.111</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N240 G01X- 14.211Y- 44.624</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N250 G03X- 10.500Y- 46.128I19.876J43.709</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N260 G01Y- 56.000</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N270 G03X2.110Y- 66.286I10.500J - 0.000</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N280 G03X17.763Y- 60.911I- 12.980J63.277</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N290 G01X17.764Y- 60.910</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N300 G03X31.606Y- 51.491I- 26.962J54.503</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N310 G03X42.356Y- 38.437I- 38.811J42.913</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N320 G03X48.791Y- 22.552I- 46.582J28.117</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N330 G02X60.783Y- 15.056I9.744J - 2.248F800</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N340 G01X58.535Y- 24.800</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N350 Z10.000F100</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N360 G00Z100.000</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N370 X0.000Y0.000</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N380 M05</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US">N390 M30</span></p> <p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">該凸輪零件加工過程中，涉及了坯料的選擇</span> <span style="font-family:宋體; mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"">加工順序的確定</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">機床選用</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">裝夾方式的選擇</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">刀具選用</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">走刀路線安排</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">切削參數的設定等工藝內容</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">工藝設計的好壞直接影響到加工的尺寸精度和表面粗糙度</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">加工時間的長短</span> <span style="font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">材料和人工的耗費，甚至直接影響到加工的安全性</span> <span style="font-family:宋體;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">數控加工工藝分析與處理數控編程是前提和依據，沒有符合實際的科學合理的數控加工工藝，就不可能有真正可行的數控加工程序</span></p> <p class="MsoNormal" align="center" style="margin-top:4.5pt;margin-right:0cm; margin-bottom:7.5pt;margin-left:0cm;text-align:center;line-height:13.5pt; mso-pagination:widow-orphan;mso-outline-level:1"><b><span 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