Abstract
Aiming at answering the question that low tap service life of ordinary tapping and bad thread quality on particle-reinforced metal matrix composite SiCp/Al, the reason of question and the mechanism of low-frequency torsional vibration tapping are analyzed. The experiments were carried out to compare the tap service life and the thread quality of vibration tapping with ordinary tapping without cutting fluid. It indicates that vibration tapping could make tapping torque reduce greatly, the tap service life could be prolonged twice comparing with continuous tapping without cutting fluid, and could ensure the good thread quality. Moreover, it promotes metal matrix composite’s further application.
Highlights
Particle-reinforced metal matrix composites generally use SiC, AlN, and Al2O3 as reinforcement phases, and aluminum with its alloys and magnesium as matrix materials
Particlereinforced metal matrix composites are characterized by isotropy, easy fabrication and relatively low price, and they are the focus of current research on metal matrix composites
A low-frequency torsional vibration tapping experiment was performed on SiCp/Al
Summary
Particle-reinforced metal matrix composites generally use SiC, AlN, and Al2O3 as reinforcement phases, and aluminum with its alloys and magnesium as matrix materials They have excellent physical and mechanical properties: high mechanical strengths, excellent thermal stability and low coefficient of linear expansion, etc, and they are widely used in aviation, aerospace, sports and other industries [1]. Particlereinforced metal matrix composites are characterized by isotropy, easy fabrication and relatively low price, and they are the focus of current research on metal matrix composites They are typical difficult-tomachine materials, due to the inclusion of reinforcing particles with high hardness in the matrix, they can result in severe tool wear, low processing accuracy and poor surface quality. The results show that low-frequency vibration tapping can significantly make the tapping torque reduce and effectively improve the tap service life and thread quality, which is an effective way to solve the tapping problem of SiCp/Al
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