Laminated material hole-making machining track planning method

Abstract

The invention discloses a laminated material hole-making machining track planning method. The method comprises the following steps of 1) dividing a laminated material machining process into an inlet machining stage, a stabilizing machining stage, an interface machining stage, an outlet machining stage and the like in the axial direction; 2) measuring and arranging hole-making precision data; 3) analyzing a change rule of the hole-making precision at each stage, and establishing a fitting relational expression among the aperture deviation, the roundness and the spiral track characteristic parameter; and 4) taking the minimum axial cutting force mean value and the minimum circumferential cutting force peak value as targets to obtain the optimal value of the spiral track characteristic parameter. According to the method, a way is provided for solving the problem that machining of a laminated material through hole is in an ''inverted-cone shape'', spiral motion track planning is carried out by analyzing the hole-making precision change rule of the key stage in the single-hole machining process and taking the requirement for the precision grade of the outlet stage as the core target, finally technological parameter optimization is achieved, in this way, the overall hole-making precision in the single-hole machining process can be improved, the overall cutting force level can be lowered, and the service life of a tool is prolonged.

Description

Technical field [0001] The invention relates to advanced hole-making technology in the field of aviation manufacturing, and in particular to a method for trajectory planning for hole-making processing of laminated materials. Background technique [0002] With the advancement and development of advanced aviation manufacturing technology, typical aviation high-performance materials represented by aviation aluminum alloy, titanium alloy, and carbon fiber composite material (CFRP) have highlighted their advantages in terms of lightweight aircraft structure, low energy consumption, and high reliability. , And the laminated materials composed of the above difficult-to-process aerospace materials mechanically are superior to any single material in material properties. Therefore, among the laminated materials of aircraft wings, composite materials are selected for wing panels, and aluminum and titanium alloys have been used in engineering applications, and the amount of titanium alloys a...

AI Technical Summary

Problems solved by technology

Patent document CN 105728811A discloses a method and system for robotized spiral hole-making of aircraft fuselage laminated materials, which improves the hole-making efficiency of fuselage laminated materials by increasing the axial feed pitch; While the small axial feed pitch is efficient for spiral hole making, the revolution speed of the terminal hole making actuator is reduced to suppress the excitation force caused by the mass eccentricity of the terminal hole making actuator; it does not depend on the composition of the laminated material Therefore, the above-mentioned patent documents only improve the efficiency of processing holes, but do not significantly improve the processing defects of each component material of the laminated material at the exit, entrance and interface.

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