Research On Robot Automatic Scribing Technology For Complex Multi-structure Parts

Aiming at the realistic problems such as the difficulty in aligning the scribe line during the processing of aerospace precision castings and forgings,the severe requirements on the operator's experience,and the long processing time,which severely restrict the production cycle and quality of the product,and affect the production of the final product,etc.Robot automatic scribing technology for complex multi-structure parts.By collecting data of complex parts and assigning digital margins,the robot is driven to realize automatic and precise scribing,which greatly shortens the time for manual measurement and manual analysis and adjustment of scribing,improves processing efficiency,and effectively guarantees scribing accuracy.The main research work and results of the paper are as follows:1.Research the point cloud data acquisition and preprocessing technology,and propose the equidistant sampling discrete technology based on triangular patches.The non-contact acquisition of data is used to solve the problem of contact measurement of complex thin-walled data through discrete preprocessing.Problems such as incomplete measurement data due to part deformation and limited measurement area.2.Based on the actual research,the machining margin optimization technology based on accurate registration of digital and analogues is researched.By analyzing the processing benchmarks,a digital and analogue registration fine-tuning technology for uniformity of margins is proposed to realize the redistribution of machining allowance,To solve the problems caused by the unreasonable allocation of margin during machining,the positioning benchmark is not easy to determine and other problems caused by processing.3.Carried out research on robot automatic scribing control technology based on the results of margin optimization.By re-optimizing the scribing trajectory of the workpiece and compiling the robot motion control program,the robot's scribing execution device was used to implement the planning of the complex multi-structure reference line.Effectively shorten the work cycle and improve processing efficiency.4.Combined with MFC,Open GL graphics library,dynamic link library and other technologies,independently designed and developed the margin analysis software and robot motion control program for robot scribing,and carried out machining experiments,which verified the rationality and Practicality.