中南大學(xué)SolidWorks列車曲面建模

中南大學(xué)交通運輸工程學(xué)院實驗報告實驗名稱:列車曲面三維造型專業(yè)班級：11交通試驗班姓名：學(xué)號：一、 實驗?zāi)康耐ㄟ^對列車車頭模型的曲面測繪，了解列車車頭曲面的成型過程，掌握曲面測繪的基本方法，熟悉和鞏固三維繪圖軟件Solidworks中關(guān)于曲面建模的基本操作過程。二、 實驗原理列車模型曲面測繪的原理列車模型的曲面測繪，主要通過化面為線，化線為點的辦法來進行，即在整個曲面上，選取關(guān)鍵橫截面的輪廓線，又在其輪廓線上選取關(guān)鍵點，最終，曲面的測繪轉(zhuǎn)化為了點的測繪。點的測繪原理點的測繪，采用臨界接觸法。在模型上選取好特征截面及特征點，做好標(biāo)記，并放置于數(shù)控機床的加工臺上，機床加工臂處夾一根導(dǎo)電的接觸針，通過控制加工臂的三個方向的坐標(biāo)，使接觸針和標(biāo)記好的特征點慢慢接近。由于接觸針和車頭模型都是導(dǎo)體，兩者間用一歐姆表連接，則接觸針和模型是否剛好接觸，可由歐姆表的示數(shù)判斷。若剛好有示數(shù)，則此時為剛好接觸。此時加工臂的坐標(biāo)顯示可認(rèn)為是該特征點的相對坐標(biāo)。曲面建模的原理將每個特征截面的特征點坐標(biāo)記錄下來，導(dǎo)入至solidworks，可以得到若干條特征曲線，通過曲面放樣的辦法，就可以得到整個曲面了。三、 實驗方案及實驗過程將整個曲面分為13個特征截面，每個特征截面上選取10-12點特征點；分成3個小組，每個小組負(fù)責(zé)3個特征截面的特征點測繪，并記錄3條特征曲線的坐標(biāo)；將3個小組的數(shù)據(jù)整合，得到13條曲線的坐標(biāo)，導(dǎo)入至solidworks中；對上述曲線進行曲面放樣，完成列車曲面的建模；運用solidworks，完成列車頭型內(nèi)部骨架的數(shù)字化設(shè)計；

四、 實驗結(jié)果通過匯總3個小組的實驗數(shù)據(jù)，進行整理，得到13條特征曲線的坐標(biāo)，記錄如下：截面1截面2截面393.77934139.65139-63.01-51192-61.998-42.1793.77912139.18139-64.632-34192-61.998-42.1793.779-6.5137.796139-65.602-18192-62.209-30.8793.779-30.66134.62139-67.1172.54192-62.347-20.3493.779-41.71130.594139-66.64324.64192-61.79-0.5493.779-50124.765139-65.4547.3192-60.29316.3693.779-55.5119.469139-63.48474.6192-57.33835.0493.779-61.947107.407139-60.11595.4192-54.02447.9793.779-64.82885139-53.835107.8192-48.98960.2693.779-65.99664139-49.59112.3192-45.26966.8393.779-67.38139139-41.96118.789192-37.96775.3193.779-68.69112.37139-34.25122.939192-27.70582.6193.779-67.39-5139-12127.469192-11.289.76393.779-65.306-291398129.2741927.894.03493.779-63.597-5113934129.9071923495.758截面4截面5截面6236-61.998-42.17288.4-57.491-51331.73453.19236-62.209-30.87288.4-58.261-43.55331.79.4550.414236-62.347-20.34288.4-58.617-33.09331.7-10.243.198236-61.79-0.54288.4-58.538-20.64331.7-27.531.909236-60.29316.36288.4-56.703-0.58331.7-39.13519.559236-57.33835.04288.4-53.5713.48331.7-46.3636.159236-54.02447.97288.4-47.9830.033331.7-50.18-5.411236-48.98960.26288.4-39.07244.632331.7-53.114-21.031236-45.26966.83288.4-25.30257.093331.7-53.863-35.071

236-37.96775.31288.4-8.08266.097331.7-53.699-40.264236-27.70582.61288.412.48871.749331.7-53.365-45.316236-11.289.763288.43473.517331.7-52.805-512367.894.034截面7截面8截面9359.993438.179386.093422.221405.226348.836359.9914.4636.55386.0917.9221.239405.22617.67.781359.991.5132.806386.095.9418.188405.2266.574.965359.99-10.1427.481386.09-6.8612.818405.226-5.93-0.247359.99-2319.106386.09-16.866.95405.226-12.73-4.03359.99-34.021&816386.09-27.46-1.469405.226-16.43-6.444359.99-41.794-3.184386.09-35.108-10.669405.226-26.33-14.726359.99-47.742-21.454386.09-41.542-25.569405.226-31.484-21.564359.99-48.9-30.054386.09-42.547-30.069405.226-35.164-30.744359.99-49.241-35.024386.09-43.164-35.069405.226-36.289-35359.99-49.375-40.004386.09-43.607-40.069405.226-36.767-40359.99-49.139-45.004386.09-43.69-45.069405.226-37.179-45359.99-48.502-51386.09-43.158-51405.226-36.713-51截面10截面11截面12419.57234-2.434435.15434-16.043448.04834-32.4419.57222.5-2.776435.15421.3-16.535448.04822.7-32.932419.57217.6-3.451435.15410.03-19.199448.04814.58-35.917419.5724.8-6.972435.154-0.47-23.835448.0488.87-40.413419.572-6.4-11.823435.154-9.47-30.74448.0486.055-45.013419.572-14.8-17.116435.154-15.007-40.043448.0486-51419.572-19.7-21.295435.154-15.394-51419.572-22.6-24.456截面13419.572-26.206-30.056452.82234-51419.572-28.144-35.056419.572-29.311-40.046419.572-29.702-45.146419.572-28.995-51依照上表數(shù)據(jù)，將13條特征曲線導(dǎo)入solidworks，進行曲面放樣，可以得到曲面建模結(jié)果。進行曲線放樣的步驟簡單介紹如下：1.將13條特征曲線的xyz坐標(biāo)以txt格式的文檔保存；截面1.,戟面5Q截面？.,武面g..戟面in—戟面虹2014/6/&15:0& 文本如2014/6/&15:0& 文本如2014/6/&14:53 文本舞2014/6/615:05 文本文桔2014/6/&工d 対文檔2&14/6/&14:16 文本誹2D14/6/614:19 文本丈欄2014/6/614:23 丈:本交檔2014/&/&14:25 文本文梏2&14/6/&14:27 丈本如2014/6/614:28 文本注]—険面：L22014/&/614:30 文本舞2014/6/614-30 卻躺2.3.以13條