Comparison Between T-Spline Surface and NURBS Surface

Abstract

This research uses T-spline for surface modeling and compares it with NURBS modeling to get the best modeling points between the two methods. The comparison will be through surface analysis and manufacturing process.T-Splines surfaces typically have 50-70% less geometric data structure than the equivalent NURBS surface, allowing for faster and more controlled direct editing and shape optimization. In Environment Map analysis, the image of T-Spline surface for the models is reflected more clearly than a NURBS surface, in measurement runtime for machining (roughing and finishing), the T-spline surface for the bicycle seat model is machined in (16 minutes) less than machining the NURBS surface, and the T-Spline surface of the longitudinal section of the bottle model is machined in (10 minutes) less than machining the NURBS surface. In measurement of roughness, the T-Spline surface for the bicycle seat model has (2.4861 µm) average (Ra) for patches measured roughness average (Ra), and the NURBS surface has (4.9216 µm) average (Ra) for patches measured roughness average (Ra). ‫الـ‬ ‫سطح‬ ‫بين‬ ‫مقارنة‬ T-spline ‫الـ‬ ‫وسطح‬ NURBS ‫ا‬ ‫لخالصة‬ ‫استخدام‬ ‫تم‬ ‫البحث‬ ‫ھذا‬ ‫في‬ T-SPLINE ‫للـ‬ ‫السطحية‬ ‫النمذجة‬ ‫مع‬ ‫لمقارنتھا‬ ‫السطحية‬ ‫للنمذجة‬ NURBS .‫التصنيع‬ ‫وعملية‬ ‫السطح‬ ‫تحليل‬ ‫خالل‬ ‫من‬ ‫المقارنة‬ ‫تكون‬ ‫وسوف‬ .‫الطريقتين‬ ‫بين‬ ‫النمذجة‬ ‫نقاط‬ ‫أفضل‬ ‫على‬ ‫للحصول‬ ‫أسطح‬ ‫أن‬ T-SPLINE) ‫في‬ ‫أقل‬ ‫الھندسي‬ ‫الھيكل‬ ‫بيانات‬ ‫تكون‬ ‫ما‬ ‫عادة‬ 50-70 ‫للـ‬ ‫المعادل‬ ‫السطح‬ ‫من‬ (٪ NURBS ، ‫و‬ ‫الـ‬ ‫سطح‬ ،‫التشغيل‬ ‫وقت‬ ‫قياس‬ ‫في‬ T-SPLINE) ‫بمقدار‬ ‫أقل‬ ‫وقت‬ ‫في‬ ‫شغل‬ ‫الدراجة‬ ‫مقعد‬ ‫لنموذج‬ 16 ‫الـ‬ ‫سطح‬ ‫تشغيل‬ ‫من‬ (‫دقيقة‬ NURBS ‫الـ‬ ‫وسطح‬ ، T-SPLINE ‫وقت‬ ‫في‬ ‫شغل‬ ‫الزجاجة‬ ‫نموذج‬ ‫من‬ ‫الطولي‬ ‫للمقطع‬) ‫بمقدار‬ ‫أقل‬ ١٠ ‫الـ‬ ‫سطح‬ ‫تشغيل‬ ‫من‬ (‫دقائق‬ NURBS ‫الـ‬ ‫سطح‬ ،‫الخشونة‬ ‫قياس‬ ‫وفي‬ T-SPLINE ‫مقعد‬ ‫لنموذج‬