Design and Development of Ball Burnishing tool

Abstract—

当今的金属加工行业通常有兴趣在几种组件中引起压缩残留应力，它们每天都会在制造过程中遇到。完成过程的常规方法。研磨，润滑用于改善金属组件的表面饰面，但是在整理过程中扮演着相同作用的耐磨过程具有许多与IT相关的优势，成功地满足了上述要求。本文介绍了有关球抛光工具的设计和发展问题的研究结果。该工具用于通过控制不同的参数成功执行抛光过程。

Burnishing

The burnishing process consists of pressing hardened steel rolls or balls into the surface of the workpiece and imparting a feed motion to the same. Ball burnishing of a cylindrical surface is illustrated in Fig.

During burnishing considerable residual compressive stress is induced in the surface of the workpiece and thereby fatigue strength and wear resistance of the surface layer increase.

球抛光的表面质量如何改善？

在此过程中，硬化的钢球按下工件表面。表面饰面明显改善。此外，表面上会产生残留的压缩应力，进而改善疲劳性耐药性。由于抛光而导致的工作硬化效果也增强了表面的耐磨性。因此，通过球来磨削工件表面的整体质量，大大改善了。

It is observed that the conventional machining methods such as turning and milling leave inherent irregularities on machined surfaces and it becomes necessary to very often resort to a series of finishing operations with high costs. However, conventional finishing processes like grinding, honing and lapping are traditionally used finishing processes, but these methods essentially depend on chip removal to attain the

desired surface finish, these machining chips may cause further surface abrasion and geometrical tolerance problems. Accordingly, burnishing process offers an attractive post-machining alternative due to its chip less and relatively simple operations . Many researchers have done their works by developing different types of burnishing tools i.e. ball and roller burnishing and making them ready to use with conventional machine tools viz. Lathe and milling.

DESIGN OF BURNISHING TOOL

As it was decided to carry out the ball burnishing process in present work among two process of burnishing, the first and foremost work is to design and develop the ball burnishing tool by selecting suitable materials, dimensions and proper design such that the process and the tool is simple, cheaper and requires minimum time consumption with minimum cost. The tool developed in this work can be used on convectional machine tools like lathe. Fig. shows the tool developed in this work to carry out ball burnishing process with interchangeable roller burnishing tool assembly. This option increases flexibility of the tool and allow us to carry out both the processes.

The burnishing tool designed in above said manner consists of parts namely ball holder, square casing, lock pins and threaded lock support and spring. The design of tool is made in consideration with the parameters to be selected and to be controlled in the work. The experimental work is planned to conduct mainly considering four different parameters and burnishing force is one among the parameters. So, the force is measured by means of spring deflections in the tool. The work piece material will be 60/40 Cu-Zn and the maximum force applied on the work piece during experiment is 30kgf.