Test And Analysis Of Force And Velocity Of Abrasive In The Process Of Parallel Vertical Spindle Barrel Finishing

Preeminently contributing to improve the surface quality,surface finishing has become one of the key ways to improve the operational performance and reliability,prolong the service life of parts and products.Surface finishing technology can change the surface geometric features,improve the physical and mechanical properties of the surface layer,increase the cleanliness level,comprehensively improve the surface integrity through micro grinding effects as colliding,rolling,rubbing,scoring,etc.to the parts surface.As a kind of typical free abrasive surface finishing,the barrel finishing is widely used in the manufacturing field such as aviation,arms industry,vehicles and electronic industry as a result of its low processing cost,high processing efficiency,and simple and green environment equipment.In recent years,the dynamic variables in the barrel finishing process are mostly focused on the theoretical research.In this paper,test platforms of the dynamic force and velocity of abrasive are constructed with dynamic pressure sensors and CCD laser displacement sensors respectively.The dynamic variables in the parallel vertical spindle barrel finishing process are tested and quantitatively analyzed.The main research of paper is as follows:1.The force of abrasive on workpiece in the parallel vertical spindle barrel finishing process is tested and statistically analyzed under different processing parameters.The effect of workpiece fixing location,drum revolution speed and lubrication conditions on force is analyzed.2.The theoretical collision frequencies of the abrasive to the workpiece surface are calculated at different drum revolution speeds and machining positions.Five level decomposition of wavelet packet to the abrasive force is implemented.The statistical frequencies of eigenvalue space of the force signal under each process conditions are found to be consistent with the theoretical collision frequency.After reconstructing the force signal in the frequency range of the eigenvalue space,it is showed that the curve fitting degree of average force is advanced universally and can reveal the relative characteristic law of the force signal more accurately.3.The mechanical structure of abrasive velocity test platform is designed reasonably to enable the quantitative movement in the horizontal and vertical direction of the two CCD laser displacement sensors and the cantilever structure of isolation steel pipe,fix the two sensors and ensure accurate laser emission.Meanwhile,the two fixed mounts of CCD laser displacement sensor and isolation should be separate with each other effectively.Static stress analysis of the isolation steel pipe is completed to confirm that the maximum displacement and stress in the test are within the allowable range.4.The motion displacement of abrasive in the parallel vertical spindle barrel finishing process is tested and analyzed with the different processing parameters.The effects of distance to the drum center,drum revolution speeds,distance to the free surface of abrasive flow on the flow velocity and impact velocity of abrasive are investigated.Meanwhile,distribution trends of the flow velocity and impact velocity are explored from the probability density distribution curves.In the paper,the abrasive force and velocity in the parallel vertical spindle barrel finishing process are tested and analyzed with dynamic force sensors and CCD laser displacement sensors,which investigate the theory of the barrel finishing from the abrasive motion and fill the quantitative study blank of the dynamic variables of barrel finishing.