Pose Detection And Experiment Of The Tools In Mechanical Ruling With Main And Auxiliary Double-Tool

The main and auxiliary double-tool staggered edge mechanical ruling technology is a new method for accurate slotting of diffraction gratings by using staggered edge relative spatial pose relationship formed by two tools which has the same model.This new technology effectively suppresses the elastoplastic springback deformation and lateral plastic bulging of the groove surface during the ruling process,and the service life of the main ruling tool is prolonged.However,the traditional trial-ruling method to control the tool orientation can not meet the accuracy requirements of double-tool relative pose detection,which has been one of the important factors that restrict the further development of this technology.Therefore,it is of great significance to explore the new high-precision tool pose detection method to improve the precision of the groove ruled with the main and auxiliary double-tool,which further ensures the quality of the diffraction grating.The pose of main and auxiliary double-tool in the ruling coordinate system is detected based on laser diffraction measurement technology in this paper.Firstly,the tool coordinate system and the ruling coordinate system are established,and the relative position coordinate formula of the main and auxiliary double-tool is derived.Furthermore,the Fraunhofer far-field diffraction theory of the rectangular hole and the right-angled triangle hole is studied in depth.Based on the diffraction fringe information,the tool attitude angle detection model of laser diffraction measurement technology to constructed(positive solution),and introduced the tool attitude angle detection method(inversion solution),which based on the tool residual indentation/scratch microscopic image detection technology,to verified the feasibility and accuracy of the tool position and attitude detection method of laser diffraction measurement technology proposed in this paper.Secondly,tool posture detection test prototype was built according to the laser diffraction method,and the detection accuracy was calibrated.And then,the single-tool posture was detected by laser diffraction method,and the single-tool in-situ indentation/scratch experiment was simultaneously carried out.The single-tool pose detection results and error sources of the diffraction method were analyzed,error correction was conducted,and the corresponding precise pose of the tool under random conditions were obtained.Finally,the principle of the main and auxiliary double-tool staggered edge mechanical ruling process is introduced.The frame of the main and auxiliary double-tool was designed and analyzed by software CATIA.Based on the single-tool pose detection test with the laser diffraction method,the main and auxiliary double-tool pose was tested,and its attitude consistent accuracy was evaluated.The test of the main and auxiliary double-tool mechanical ruling process was performed,and the accuracy of the groove was analyzed based on the detection accuracy of four parameters which include shining angle,non-shining angle,shining surface and non-shining surface.So the accuracy and practicability of the tool position and attitude detection method of laser diffraction measurement technology were verified from the practical application point.Through the tool pose detection comparison test research and the main and auxiliary double-tool mechanical ruling test research mentioned above,a more accurate tool pose non-contact detection method was finally obtained in this paper,which laid the foundation of the subsequent further in-depth investigation on the main and auxiliary double-tool mechanical ruling process.