Research On The Key Technology Of Magnetic Compound Fluid Curved Surface Numerical Control Grinding

Finishing technology of mechanical machining is called by a joint name of all kinds mechanical machining technology、methods which aimed at improving surface quality of workpiece、reducing roughness values of workpiece surface under the condition that the accuracy of the workpiece surface is ensured. Under the finishing effect of workpiece surface, all kinds performance of workpiece have largely improved. Most machining procedure of workpiece have completed automation, while the last procedure of the production process—finishing of the workpiece surface is still wandering in the manual processing stage, greatly influenced the development of precision manufacturing industry of our country.Magnetic compound fluid grinding method is based on the traditional grinding, which is a new type of finishing technology that use magnetic field and magnetic abrasive format "magnetic brush" with certain rigidity, and because of the characteristics of flexibility, adaptability and so on it was widely used. In this paper, analyses the removal rules magnetic fluid curved surface grinding, then according to the removal rules design self-adaption control system of tool path, in order to obtain the same roughness grinding.Firstly, do the analysis of macroscopic and microscopic removal mechanism of magnetic compound fluid, focuses on the impact of cutting tool path and grinding gap of magnetic fluid curved surface grinding, depended on the conventional "zigzag" tool path I put forward the tool path that suitable for the magnetic fluid curved surface grinding.Secondly, based on the laboratory plane grinding device I put forward the overall structure and control system scheme, focuses on the analysis of curved surface grinding head structure, and use ANSYS compare the magnetic field generated by the slot and no slot magnetic head. The functional analysis of surface grinding device is done to propose the overall control scheme that combines machining and measuring.Then, do the planning of the trajectory of laser measuring head, according to the workpiece surface model do block scanning, use larger line spacing in flat areas, use smaller line spacing in cliff areas. On the base of tracking algorithm models that in common use, according to the feedback of Z orientation coordinate readings from workpiece to be measured to do self-adaption of tracking method.Lastly, using VC++ and Open GL do tool path self-adaption planning, use linked list storage data. Curved surface model is discrete by STL model which composed of triangular facets, according to the planning of tool path which is proposed in the second chapter set the section line spacing, method of surface of section is used to calculate the tool and the workpiece surface cutter contact trajectory, upon the cutter contact trajectory, according to the radius of tool and grinding gap, cutter location trajectory is bias generated, using examples to verify the trajectory.