基于破损零件逆向设计的快速成型及质量分析

Fast Prototype and Quality Analysis Based on Reverse-Design of Broken Parts

对漏油嘴零件的实际测量和在UG中的建模,实现破损漏油嘴原型复原的逆向设计。通过UG导出的STL模型,及Catalyst软件的分层处理,实现零件的快速成型制作。为证实原型件可以与原零件互换使用的可能性,分别从尺寸精度、强度和表面质量进行了分析。通过ABS丝材收缩率补偿后快速成型,及STL面片模型的分析,得到原型件存在的收缩误差和原理性误差。应用堆积机理说明原型件强度取决于丝材的粘接强度,而小于丝材本身强度的特点。分析了丝材粘结层最小厚度及路径宽度的限制对成型表面质量的影响。通过最终分析得出原型件在强度或表面质量要求不高的情况下,如漏油嘴,可以与原零件互换使用;要求较高,则只能作为原型展示。

Reverse design of a broken oil filler part was implemented through measuring and UG modeling. Exporting STL file from UG and layered process with Catalyst software can create a fast prototype part. Dimensional precision, strength and surface roughness were analyzed to prove the feasibility of prototype part in place of original part. With an analysis of compensation of ABS shrinkage rate to FP and STL facet model, the shrinkage errors and principle errors were got. Fused deposited mechanism was used to prove the prototype part strength in linkage with fused material adhering strength below the material strength. Surface quality was analyzed to be restricted by the fused material adhering layer＇ s minimum thickness and minimum fused path width. Finally, a conclusion was got that the prototype part can be used instead of the original part on the condition of low demand of strength and surface roughness, like the filler oil part and only be used to display as a model on the contrary.