A method for planning the machining trajectory of a laminated material hole

Abstract

The invention discloses a method for planning a hole-making process trajectory of a laminated material, which comprises the following steps: 1) dividing the processing process of the laminated material into processing stages such as entry, stabilization, interface, and exit along the axial direction; 2) measuring and sorting out the hole-making accuracy 3) Analyze the variation law of the hole making precision at each stage, and establish the fitting relationship between the hole diameter deviation, roundness and the characteristic parameters of the spiral trajectory; 4) The average value of the axial cutting force is the smallest, and the peak value of the circumferential cutting force is the smallest As the goal, the optimal value of the characteristic parameters of the spiral trajectory is obtained. The invention provides a way to solve the problem of "inverted cone" in the through-hole processing of laminated materials. By analyzing the variation law of the hole-making precision in the key stage of the single-hole processing process, the core goal is to meet the precision level requirements of the export stage, and the spiral movement is carried out. Trajectory planning, and finally realize the optimization of process parameters, which can not only improve the overall hole-making accuracy of the single-hole machining process, but also help reduce the overall cutting force level to prolong the tool life.

Description

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

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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