| Slender rod parts play an important role in the mechanical equipment which processed by cylindrical honing technology generally. Due to the thin slender parts have large length to diameter ratio and poor rigidity, causing vibration and bending deformation when machining. Common cylindrical honing processing efficiency are low, also oil stone jams, workers labor intensity, these problems have restrict the application of the precision machining technology. Ultrasonic vibration honing processing technology as a new precision machining technology has the characteristics of lower honing force and low temperature when working, which can effectively improve the surface of the slender rod parts processing quality and efficiency. The shape of the irregularity, the distribution of the randomness and size of the uncertainty of the grains on the oilstone make the mechanism study of grinding compared with turning and milling are more challenging. Traditional analytical model application scope is limited and experiment method costly. The finite element simulation method is a new method for research of grinding process. The study of slender rod cylindrical honing technology is seldomdomestic and overseas, and the effect of ultrasonic vibration honing process parameters on the machining quality has not been very well solved. Therefore, the study aimed at solve above problems on the basis of consulting a large number of literature for the following research work.1) Analyzed the machining characteristic according to the vibration of the ultrasonic vibration honing oilstone state, established the ultrasonic vibration oil stone motion equation and the single grain space motion parameter equation, then, simulated the grain trajectory by MATLAB. Analyzed the reason of the axial vibration oil stone processing efficiency, built the equations of ultrasonic vibration honing material removal, the ultrasonic vibration damping mechanism and factors affecting friction decreases also analyzed according to the antifriction phenomenon existing in the ultrasonic vibration machining.2) Established the single grain cutting model of three dimensional finite element according to the characteristics of ultrasonic vibration honing, analyzed the machining finite element theory and key technologies of ultrasonic vibration honing. The simulation results shown that ultrasonic vibration honing force and honing heat have a certain degree of reduction and the chip is shorter. Ultrasonic vibration honing is able to improve the residual stress distribution of machined surface and pre-stress ultrasonic vibration honing can make the surface in the compressive residual stress state.3) Based on the analysis of the principle of cylindrical honing, the ultrasonic vibration slender cylindrical honing device was designed. The honing device has the function of opening and closing on both sides, the radial feed of honing head is realized by using inclined wedge structure, hydraulic synchronization technology were used to ensure that the honing head radial feed accuracy, using the plastic linear bearing support device to follow the honing device.4) According to the existing experiment equipment in laboratory, an ultrasonic vibration honing experiment device was designed and the corresponding experiment was carried out.The experiment results shown that ultrasonic vibration honing head can be atomized droplets proved that equipment to meet the experimental requirements. The oilstone clogging situation has improved and honing force has decreased. |
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