Numerical control machining cutter path generation method based on double helix space filling curves

Abstract

The invention discloses a numerical control machining cutter path generation method based on double helix space filling curves. The numerical control machining cutter path generation method comprises step 1 of determining orders of the filling curves according to residual height and curve shapes and generating the double helix space filling curves which meets requirements for the orders on a two-dimensional plane; step 2 of improving corner portions of cutter paths and optimizing the cutter paths; and step 3 of mapping two-dimensional filling curves on a space curve surface according to a mapping principle to obtain the satisfied cutter paths in numerical control machining. The numerical control machining cutter path generation method conducts element improvement on the basis of the existing space filling curves, shortens length of the whole cutter path and reduces turning of the whole cutter path. Arc transition is carried out at the corner to enable the whole cutter path to be smooth, frequent starting and stopping of speed and frequent changing of feeding directions in a manufacture process caused by 90-degree right-angle connection are avoided, impacts on a machine tool, a cutter and a manufactured surface are reduced, and quality of the manufactured surface is improved accordingly.

Description

technical field [0001] The invention relates to a tool trajectory planning method in the technical field of machine tools, in particular to a method for generating a numerically controlled tool trajectory based on a double helix space filling curve. Background technique [0002] Freeform surfaces are widely used in product design, and tool path generation is the most important content in NC machining of freeform surface parts. The quality of the tool path directly affects its machining accuracy and machining efficiency. At present, the traditional methods of tool trajectory generation methods include equal residual height method, parameter line method, etc. The commonly used methods are curvature matching method and equal gradient method. At the same time. To this end, we propose a new tool path generation method, that is, a double helix filling curve, and at the same time fillet the corners, which can effectively meet the requirements of reducing impact load and improving...

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Problems solved by technology

Moreover, the Hilbert filling curve generated by it has many changes in direction,

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