The Research On Accuracy And Efficiency For Laser Truing And Dressing Of Bronze-bonded Diamond Wheels By Acoustic-optic Q-switched Nd:YAG Pulsed Laser

With excellent grinding performance, the Bronze-bonded diamond wheels have a wide application prospect in the field of precision, ultra-precision, high efficiency grinding, grinding automation and difficult processing material forming. In recent years, because of the breaking through of the grinding wheels manufacture question and the increasing application to difficult processing materials such as ceramics, glasses and so on, Bronze-bonded diamond wheel's application growth sharply. Because of the ultrahigh hardness of diamond, it's difficult for traditional truing and dressing method which was based on the interaction of force to promot. which really affects the grinding performance of Bronze-bonded diamond wheels. A new method which to solve problems of truing and dressing Bronze-bonded diamond wheel fundamentally truing has attracted much attention all over the world.A set of laser triangulation system based on three angular measurement mensurations has been designed in this paper. The reasonable testing program has been determined, the reasonable design parameter and the appropriate optical elements are selected. The experiment of a single pulse ablation on a bronze-bonded diamond wheel has been carried out. The relationship between the ablated effect and some different laser ablating parameters such as laser intensity, power intensity, repetition frequency and focal position, has been analyzed. The ablated topographies of the wheel were observed, obtained the appropriate laser parameters to truing and dressing wheel. analyzed the bronze-bonded diamond grinding wheel truing and dressing mechanism by laser.Using PSD as the electro-optic detecting element, the principle of work of PSD has been analyzed. Using the microfeed of the 2-D precision positioned to simulate the precise circle beat of the grinding wheel surface, the linear relationship between U0 and X in theory is derived. Demarcation is carried on to the relationship between the micro displacement and the output voltage signal. Test results showed that: the relationship between U0 and X is linear. The results of calibration coincide with the theoretical value, and the accuracy of triangulation system and detection circuit is verified. Then the triangulation system and detection circuit are used in the laser ablation system demarcation experiment.Which are prepared for the next precision laser test. To make the surveys position and its integration with the optics triangulation, the processes laser is used for triangular surveying directly, and the light source of examination and processing is made into one. According to the results of calibration, adjusting the comparison voltage. we have choosen reasonable laser process parameters for the experiment and analyzed the truing and dressing topographies in each kind of experimental parameter by video microscope.The precisely truing and dressing technology of laser-machinery which is suitable to truing and dressing Bronze-boned diamond wheels with bigger abrasives in size, which will be studied in further.