Improving the quality of surface in polishing process with the magnetic abrasive powder polishing (MAPP) by use of ultrasonic oscillation of work-piece on a CNC table

Abstract

In this research work, polishing inside, outside and over the cylindrical parts has been done by using a completely new and innovative method. The work-pieces have been placed on a two-axis Cartesian CNC Table for polishing operations. The Magnetic Rotary Head continuously changes its rotation direction from CW to CCW and CCW to CW and meanwhile the part begin to oscillate up-and-down under a High Frequency (20 kHz) conditions. The Frequency of changing direction From CW to CCW and CCW to CW is one of the important parameters in this method. This method is a kind of Ultrasonic Assisted Polishing (UAP) and novelty of this research work is combining this method with motion of work piece under CNC trajectory with continuously changing direction of Magnetic Rotary Head. Gap between Rotary Magnetic Polishing Head and the Work piece Surface can be controlled by a power transmission screw which operates in the direction of the vertical axis. Several experiments have proved high performance of this new proposed method in the process of polishing in short times.

Modeling and Parameter Optimization of Flexible NC Polishing Vibration of Abrasive Cloth Wheel Based on Sensitivity Analysis

“…Sensor wire According to equation (12), the sensitivity curves of polishing vibration RMS value to spindle speed, compression depth, feed rate, and granularity were obtained, as shown in Figure 9. Based on the analysis of relative sensitivity, the feed rate is not further selected within the process parameter range.…”

“…Sun et al [11] used robotic belts to polish complex profiles of metal parts. Mirian et al [12,13] polished the inner and outer surfaces of cylindrical parts on a 2-axis CNC machine. Dunn and Walker [14] proposed a random tool polishing path and numerical control subaperture polishing technology based on CNC machine tools.…”

Recent Development of Vibration-Assisted Abrasive Machining

“…The system can make the workpiece obtain at least 1µm amplitude horizontal vibration and finish the workpiece with HRC61 hardness to nanometer order in a shorter time. Mirian [5] developed the magnetic abrasive finishing process by using high-frequency oscillation on the cylindrical pieces. The cylindrical piece was directly connected to the special designed ultrasonic horn to gain the vertical high frequency oscillation.…”

The Impact of Lubricants on the Precision Lapping Process

“…In the precision lapping process, PTR occurs due to the removal of materials from the pole tip (NiFe/NiCoFe). Studies have mainly focused on the correlation between PTR and mechanical parameters, such as load, lapping time, diamond size, abrasive mechanism/model, and test methods (Goldade & Bhushan, 2002; Scott & Bhushan, 2002; Zhong, 2002; Kwon et al, 2005; Ortiz-Merino & Todd, 2005; Shi et al, 2005; Mirian et al, 2011). Besides mechanical factors, the choice of lubricant plays an important role for PTR and surface finish.…”