Molding grinding wheel dressing data acquiring method based on multi-axis linkage precision measuring system

Abstract

The invention discloses a molding grinding wheel dressing data acquiring method based on a multi-axis linkage precision measuring system. According to the molding grinding wheel dressing data acquiring method, a test piece of a complex type wire part is installed in the multi-axis linkage precision measuring system, a segmented dual-axis linkage measuring path is adopted to project a motion control scheme after basic data are inputted into a necessary software of the multi-axis linkage precision measuring system, an equal arc-length differential sampling method is adopted to collect measuringdata, theoretical design points are then fitted to determine the normal vector of each point, the theoretical design points are taken as moving window interpolation centers, local curvilinear functions of the measured data in the design points are determined by adopting a moving window Lagrange interpolation polynomial, the distances from the theoretical design point to local curves is calculatedin accordance with the design points, the normal vectors and the local curves, and the distances is namely the normal error values of the theoretical design points of a grinding wheel, that is the reference data of the secondary grinding wheel dressing. According to the molding grinding wheel dressing data acquiring method, the secondary grinding wheel dressing data is thus acquired through the detection of complex type wire part contour error results acquired by forming grinding.

Description

technical field [0001] The invention belongs to the field of precision and ultra-precision machining, and in particular relates to a method for acquiring data of forming mold grinding wheel dressing based on a multi-axis linkage precision measurement system. Background technique [0002] Form grinding means that the finished workpiece needs to be processed into a specific shape by grinding. Form grinding is different from general plane, outer circle, centerless and inner diameter grinding. The form grinding process is to wash the grinding wheel with a stone pencil or directly Manufactured into the required specific shape, that is, the grinding wheel is trimmed into a reverse surface that completely matches the workpiece surface, and then the workpiece is ground with the grinding wheel to obtain the desired shape. This grinding method is also called "Profiling Grinding". When the grinding wheel has been used for a period of time, after wear or bluntness occurs, the grinding ...

AI Technical Summary

Problems solved by technology

However, for some forming grinding wheels used for surface finishing, the processed parts are generally complex workpieces with special rotating surfaces, such as helical rotors, cycloidal gears and other complex profiled surface parts, and the grinding wheel dressing data largely depends on Due to the engineering experience of the operator, it is difficult to achieve quantitative trimming data, so only qualitative production and processing guidance can be carried out

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