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Five-axis side milling processing tool and workpiece deformation error compensation method

A deformation error and compensation method technology, applied in the field of mechanical machining, can solve the problems of long processing time and large deformation error of thin-walled aviation parts, and achieve the effect of accurate calculation results and broad application prospects.

Active Publication Date: 2018-04-20
TSINGHUA UNIV
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Problems solved by technology

[0005] In order to solve the problems of large deformation error and long processing time of existing aviation thin-walled parts, the present invention provides a compensation method for five-axis side milling tool and workpiece deformation error

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  • Five-axis side milling processing tool and workpiece deformation error compensation method
  • Five-axis side milling processing tool and workpiece deformation error compensation method
  • Five-axis side milling processing tool and workpiece deformation error compensation method

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] figure 1 It is a calculation flow chart of a five-axis side milling tool and workpiece deformation error compensation method provided by the present invention. The method first establishes the workpiece coordinate system and the tool coordinate system, and calculates the position of the specified tool according to the five-axis side milling cutting force model. The milling force, five-axis flank milling cutting force model can refer to the literature "Xu K, Wang J, Chu C H, etal. Cutting force and machine kinematics constrained cutter location planning for five-axis flank milling of ruled surfaces [J]. Journal of Computational Design and Engineering ,2017."; Secondly, the deformation of the tool and the workpiece were calculated by using the cantilever beam model and the finite element model; thirdly, considering the feedback effect of the tool and workpiece def...

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Abstract

The invention provides a five-axis side milling processing tool and workpiece deformation error compensation method. The method comprises a step of calculating milling force based on a five-axis sidemilling cutting force model and then using a cantilever beam model and a finite element model to calculate the deformation of a tool and a workpiece, a step of solving a deformation error under a cutting balance state by using an iterative algorithm with the consideration of the feedback influence of tool and workpiece deformation on milling force in a machining process, a step of modifying the position of a tool tip and the inclination angle of a tool shaft at a current tool position according to the principle of mirror image, inputting an updated tool position into the cutting force model and recording a tool position in a balance state after iterative calculation, and a step of traversing the above process for each tool position point and obtaining a compensated tool path. According tothe method, the reduction of the deformation error caused by the cutting force in a five-axis side milling processing process is facilitated, and the method plays an important role in improving the machining accuracy of parts. The method is applicable to the compensation of a deformation error in the five-axis side milling processing of an aerospace thin-wall workpiece by using a ball-end millingcutter or a round nose milling cutter.

Description

technical field [0001] The invention relates to a five-axis side milling machining tool and workpiece deformation error compensation method, which is especially suitable for deformation error compensation when using a ball nose milling cutter or a round nose milling cutter to perform five-axis side milling on aviation thin-walled parts, and belongs to machinery The field of machining technology. Background technique [0002] Aeronautical thin-walled parts have the characteristics of low rigidity, high precision requirements, and complex surfaces, and are widely used in the aviation industry. Five-axis side milling is the main way to obtain such parts. During the processing, the tool and workpiece are prone to elastic deformation under the action of cutting force, which seriously affects the dimensional accuracy of the parts. In order to ensure the qualified rate of parts, multiple passes are often used in engineering practice. Although this method can effectively reduce er...

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Application Information

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IPC IPC(8): G05B19/404
CPCG05B19/404G05B2219/35408
Inventor 王立平佀昊
Owner TSINGHUA UNIV
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