文档介绍：优质资料
南湖学院
毕业设计(论文)
外
文
翻
译
资
料
作者
届别
2011
系别
机械与电子工程系
专业
机械设计及其自动化
指导老师
职称
副教授
完成时间
2011年5月18日
Automated surface finishing of plastic injection mold steel with spherical grinding and ball burnishing processes
Abstract
This study investigates the possibilities of automated spherical grinding and ball burnishing surface finishing processes in a freeform surface plastic injection mold steel PDS5 on C machining center. The design and manufacture of a grinding tool holder has been plished in this study. The optimal surface grinding parameters were determined using Taguchi’s orthogonal array method for plastic injection molding steel PDS5 on a machining center. The optimal surface grinding parameters for the plastic injection mold steel PDS5 were bination of an abrasive material of PA Al2O3, a grinding speed of 18 000 rpm, a grinding depth of 20 μm, and a feed of 50 mm/min. The surface roughness Ra of the specimen can be improved from about μm to μm by using the optimal parameters for surface grinding. Surface roughness Ra can be further improved from about μm to μm by using the ball burnishing process with the optimal burnishing parameters. Applying the optimal surface grinding and burnishing parameters sequentially to a fine-milled freeform surface mold insert, the surface roughness Ra of freeform surface region on the tested part can be improved from about μm to μm.
Keywords Automated surface finishing; Ball burnishing process; Grinding process; Surface roughness; Taguchi’s method
1 Introduction
Plastics are important engineering materials due to their specific characteristics, such as corrosion resistance, resistance to chemicals, low density, and ease of manufacture, and have increasingly replaced ponents in industrial applications. Injection molding is one of the important forming processes for plastic products. The surface finish quality of the plastic injection mold is an essential requirement due to its dir