【導讀】的塑性曲面是在數控加工中心完成的。這項研究已經完成了磨削刀架的設計與制造。對于PDS5注塑模具鋼的最佳球面研磨參。20微米，磨削轉速為18000RPM。用優(yōu)化的參數進行表面研磨，表面粗糙度Ra值可由大約。Ra值從微米至微米左右。拋光，曲面表面粗糙度就可以提高約微米到0微米。部件在工業(yè)中廣泛應用。注塑成型對于塑料制品是一個重要工藝。注塑模具的表面質量是。設計的本質要求,因為它直接影響了塑膠產品的外觀和性能。用于改善表面光潔度。研磨工具(輪子)的安裝已廣泛用于傳統模具的制造產業(yè)。自動化表面處理的球磨研磨工具將得到示范和開發(fā)。注塑模具鋼的球面研磨最優(yōu)化參數目前尚未在文獻得到。對表面粗糙度有重大影響的拋光工藝主要參數，主要是球或滾子材料，拋光力，進。給速率,拋光速度,潤滑、拋光率及其他因素等。度可以改善大致為40％至90％。和殲比檢驗來測定每一個主要的因素。品在國內汽車零件領域和國內設備。該材料的硬度約HRC33。具體好處之一是,由

　　

【正文】 ermine the optimal spherical grinding parameters Table 2 summarizes the measured ground surface roughness alue Ra and the calculated S/N ratio of each L18 orthogonal array sing Eq. 1, after having executed the 18 matrix experiments. The average S/N ratio for each level of the four actors is shown graphically in Fig. 7. Table2. Ground surface roughness of PDS5 specimen Exp. Inner array (control factors) Measured surface roughness value (Ra) Response no A B C D ? ?my?1 ? ?my?2 ? ?my?3 S/N(η(dB)) Mean ? ?my?_ 1 1 1 1 1 2 1 2 2 2 3 1 3 3 3 4 2 1 2 3 5 2 2 3 1 6 2 3 1 2 7 3 1 3 2 8 3 2 1 3 9 3 3 2 1 10 1 1 2 2 11 1 2 3 3 12 1 3 1 1 13 2 1 1 3 14 2 2 2 1 15 2 3 3 2 16 3 1 3 1 17 3 2 1 2 18 3 3 2 3 . Plots of control factor effects The goal in the spherical grinding process is to minimize the surface roughness value of the ground specimen by determining the optimal level of each factor. Since ?log is a monotone decreasing function, we should maximize the S/N ratio. Consequently, we can determine the optimal level for each factor as being the level that has the highest value of η . Therefore, based on the matrix experiment, the optimal abrasive material was pink aluminum oxide。 the optimal feed was 50 mm/min。 the optimal depth of grinding was 20 μ m。 and the optimal revolution was 18 000 rpm, as shown in Table 3. The optimal parameters for surface spherical grinding obtained from the Taguchi’s matrix experiments were applied to the surface finish of the freeform surface mold insert to evaluate the surface roughness improvement. A perfume bottle was selected as the tested carrier. The CNC machining of the mold insert for the tested object was simulated with Power MILL CAM software. After fine milling, the mold insert was further ground with the optimal spherical grinding parameters obtained from the Taguchi’s matrix experiment. Shortly afterwards, the ground surface was burnished with the optimal ball burnishing parameters to further improve the surface roughness of the tested object (see Fig. 8). The surface roughness of the mold insert was measured with Hommelwerke T4000 equipment. The average surface roughness value Ra on a finemilled surface of the mold insert was μ m on average。 that on the ground surface was μ m on average。 and that on burnished surface was μ m on average. The surface roughness improvement of the tested object on ground surface was about (?)/ = %, and that on the burnished surface was about (?)/ = %. . Finemilled, ground and burnished mold insert of a perfume bottle 5 Conclusion In this work, the optimal parameters of automated spherical grinding and ballburnishing surface finishing processes in a freeform surface plastic injection mold were developed successfully on a machining center. The mounted spherical grinding tool (and its alignment ponents) was designed and manufactured. The optimal spherical grinding parameters for surface grinding were determined by conducting a Taguchi L18 matrix experiments. The optimal spherical grinding parameters for the plastic injection mold steel PDS5 were the bination of the abrasive material of pink aluminum oxide (Al2O3, PA), a feed of 50 mm/min, a depth of grinding 20 μ m, and a revolution of 18 000 rpm. The surface roughness Ra of the specimen can be improved from about μ m to μ m by using the optimal spherical grinding conditions for surface grinding. By applying the optimal surface grinding and burnishing parameters to the surface finish of the freeform surface mold insert, the surface roughness improvements were measured to be ground surface was about % in terms of ground surfaces, and about % in terms of burnished surfaces. Acknowledgement The authors are grateful to the National Science Council of the Republic of China for supporting this research with grant NSC 892212E011059.