【摘要】：板料數(shù)控漸進(jìn)成形中不同成形角位置的厚度不同,簡單利用零件曲面或者等距偏置無法保證得到工具頭與支撐體的合理間隙。利用漸進(jìn)成形厚度減薄余弦定理δ=δ0cosθ,將加工件的表面離散為STL模型,提取STL各三角面片頂點(diǎn)坐標(biāo),x、y坐標(biāo)保持不變,z坐標(biāo)在Z軸負(fù)向偏置一個原始板材厚度,偏置后保持三角片拓?fù)潢P(guān)系不變,在此基礎(chǔ)上生成支撐體表面模型。該方法依據(jù)零件模型不同成形角部位的厚度變化規(guī)律,可以得到合理的加工間隙。選擇球冠型零件進(jìn)行實(shí)驗(yàn),獲得了較好的加工件表面質(zhì)量,對成形零件變形區(qū)厚度進(jìn)行了測量,并對所得數(shù)據(jù)進(jìn)行分析。
[Abstract]:The thickness of different position of forming angle is different in NC incremental forming of sheet metal. The reasonable gap between tool head and support can not be obtained simply by using part surface or offset. By using the cosine theorem 未 = 未 0cos 胃 of progressive forming thickness thinning, the surface of the workpiece is discretized into a STL model, and the vertex coordinates of the STL triangles are extracted. The xy coordinates remain the same, and the z coordinates are biased negatively on the Z axis to the original plate thickness. After bias, the topological relation of the triangulation is kept unchanged, and the surface model of the support is generated on the basis of this. The method can obtain reasonable machining clearance according to the thickness variation of different forming angles of the part model. The surface quality of the workpiece is obtained and the thickness of the deformation zone of the formed part is measured and the data obtained are analyzed.
【作者單位】： 南京工程學(xué)院材料工程學(xué)院;江蘇省先進(jìn)結(jié)構(gòu)材料與應(yīng)用技術(shù)重點(diǎn)實(shí)驗(yàn)室;南京交通職業(yè)技術(shù)學(xué)院;
【基金】：江蘇省先進(jìn)結(jié)構(gòu)材料與應(yīng)用技術(shù)重點(diǎn)實(shí)驗(yàn)室開放基金(ASMA201410) 南京工程學(xué)院創(chuàng)新基金項(xiàng)目(CKJB201304,CKJB201402;YKJ201311) 江蘇省大學(xué)生實(shí)踐創(chuàng)新項(xiàng)目(201511276041Y)
【分類號】：TG306

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