Dynamic precision compensation control method based on intelligent PCB drilling machine

By integrating multi-source sensors and a neural network model with embedded physical constraints onto a drilling machine, spindle deformation, thermomechanical coupling, and vibration errors are decoupled in real time, generating a multi-dimensional compensation vector. This enables high-precision and high-efficiency drilling of complex multilayer boards and solves the problem of unstable hole diameter accuracy in existing technologies.

CN120949694AActive Publication Date: 2025-11-14MEIZHOU HONGYU CIRCUIT BOARD CO LTD
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Patent Information

Application Number
CN202511280203.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-09
Publication Date
2025-11-14
Estimated Expiration
2045-09-09

AI Technical Summary

Technical Problem

Existing technologies struggle to decouple the interactive errors of spindle deformation, thermomechanical coupling effects, and tool-material vibration in real time during drilling, leading to unstable hole diameter accuracy. This is especially problematic in the machining of multilayer composite materials, where the accumulation of errors is severe and fails to meet high standards.

Method used

By integrating a multi-source sensor group on the drill spindle to collect dynamic parameters in real time, and using a neural network model with embedded physical constraints to synchronously decouple the interaction error between the thermo-mechanical coupling effect and the vibration transmission chain, a multi-dimensional compensation vector is generated. Spatial trajectory correction instructions and motion parameter optimization instructions are dynamically synthesized, and at least three compensation iterations are completed within a single drilling cycle, driving the linear motor and spindle motor to perform online accuracy compensation.

Benefits of technology

It significantly improves the drilling accuracy and hole wall quality of complex multilayer boards, reduces the influence of resonance, and ensures efficient and stable processing performance.

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Abstract

The invention relates to a dynamic precision compensation control method based on an intelligent PCB drilling machine, and the method comprises the steps: collecting a dynamic parameter set in real time through a multi-source sensor group disposed on a drilling main shaft, the dynamic parameter set comprises displacement deviation caused by axial deformation of a main shaft, thermal deformation analyzed based on interlayer temperature gradient and frequency spectrum characteristics reflecting tool-material coupling vibration, and according to the multi-dimensional compensation vector and current drilling process parameters, a space trajectory correction instruction and a motion parameter optimization instruction are dynamically synthesized, so that the dynamic parameter set is obtained. Wherein the trajectory correction instruction reconstructs a real-time interpolation path through a B-spline curve, the motion controller receives a space trajectory correction instruction and a motion parameter optimization instruction, at least three times of compensation iteration are completed in a single drilling period, a linear motor and a spindle motor are driven to execute online precision compensation, and the execution delay of the compensation instruction is smaller than 2 ms.
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