Machining trajectory planning method of variable tool machining path with equal residual height

Abstract

The invention discloses a track planning method of turning curved surface zone having equal scallop-height into a cutter processing, which belongs to the technical field of highly-precise and highly-efficient milling and processing of complicated curved surface parts. The track planning method of turning curved surface zone having equal scallop-height into a cutter processing comprises the steps of conducting zone partitioning on the curved surface based on the geometric features and processing requirement of the curved surface; determining the boundary of adjacent processing zones; conductingthe initial plan of equal scallop-height processing track on different processing zones. Through analyzing the geometric features of boundary, the geodesic radius of curvature and the cutter space along the space direction can be calculated, and the cutter contact point and cutter position point corresponding to any points on the boundary of adjacent processing zones can be resolved. The cutter position points form the cutter point boundary through interpolation and fitting. The invention is advantageous in that planning can be conducted with the cutter position point being the constraint, and it can be guaranteed that the cutter position point falls in the cutter position point boundary and on the boundary; the cutter position point can be adjusted, so that the error brought by planningcan be homogenized; the method is suitable for turning the complicated curved surface into cutter processing, and gear mark can be reduced, and processing quality can be improved.

Description

technical field [0001] The invention belongs to the technical field of high-precision and high-efficiency milling processing of complex curved surface parts, and relates to a method for planning a machining trajectory of a curved surface partition and variable tool with equal residual height. Background technique [0002] Complex surface parts are widely used in various fields such as aerospace, automobiles, ships, etc. Today, complex surface modeling technology has gradually matured, but how to achieve high-precision and high-efficiency machining of complex surface parts is still a research hotspot and difficulty. As the surface structure becomes more and more complex, the conventional machining method using unified process parameters for global machining is less suitable, especially for complex surface parts with local geometric abrupt changes. In order to meet the machining accuracy requirements of local geometrically rapidly changing complex surfaces, improve machining e...

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Problems solved by technology

However, this method only considers the machining trajectory planning of each machining area, and does not discuss the problem of connecting tool marks at the border of adjacent machining areas, which has certain limitations

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