The Structural Design And Analysis On Y-axis Components Of The Six-axis PCB CNC Drilling Machine

With the vigorous development of the electronics industry,PCB(printed circuit board),as the basis if electronics components,is playing an increasingly important role in the electronic products field.The six-axis CNC PCB drilling machine is specially designed to process PCB board,whose performance has a direct relation to the machining quality of PCB.As the PCB is becoming more high-accuracy,high-density,multilayer and small-bore,the PCB CNC drilling machine is confronted with more strict demand.However,compared to the development of the six-axis CNC PCB drilling machine at domestic and abroad.There is a long way to go for that in our country.Therefore,conducting a deep research into the six-axis CNC PCB drilling machine is of important significance.The linear motor is a new-type driving mode,which can eliminate the intermediate links in the transmission process.Characterized by high precision,no friction and centrifugal force.It is widely used in CNC PCB drilling machine.This paper have emphatically studied on the machine driven by linear motor.To design and analyze its structure a way of ”design-mechanical performance analysis-optimum design-readability analysis” is adopted here.As one of the important parts the CNC PCB drilling machine,the property of the Y-axis structure affects the overall performance of the drilling machine.(1)Combined with the method of modularization and CAD/CAM technic,the Y-axis components has drawn lessons from the idea of green design in its design proceeding,during which structural design and virtual assembly of the main components of the Y-axis structure are conducted,with corresponding assembly process made.The worktable and material clamping and positioning device are emphatically designed and analyzed.(2)Being one of the most vital parts of the Y-axis structure,the worktable has advantages of light weight and high specific stiffness,which provides better comprehensive property.The paper has put forward an idea of porous structure,which is able to guarantee rigidness of the worktable,which at the some time to reduce its quality.Due to variety of shape,size and arrangement form of the porous structure,only four kinds of worktables,whose damping orifice plates are shaped in regular triangle,square,hexagon and circle,are selected to carry on mechanical performance analysis.The result shows that deformation concentrates on where the linear motor is fixed.Considering practical,hexagon structure design follows.(3)Precision of the worktable is influenced by both tiny deformation and vibration.Based on the result of mechanical performances analysis,the paper has applied Workbench to optimize parameter of the worktable with hexagon damping orifice plates.With parameters optimized,the worktable has much lighter weight and higher rigidness.Besides,it's comprehensive property will be further improved when porous structure is applied to it.(4)In order to increase reliability,enhance machining quality,and extend serve life of the Y-axis structure,components of that are analyzed on the failure factors.Formula for computing reliability is obtained through the analysis.According to this design thinking,design and analysis to the Y-axis components of the six-axis PCB drilling machine,plus the mechanical performances analysis via which the position where the worktable most easily deforms has been founded out,both contribute to providing bases for improving the structure of the Y-axis components.Combing the porous structure with the worktable can efficiently enhance its property.Having been designed and analyzed,the structure of the Y-axis has been improved not only in the whole properties,bu also in its machining accuracy and efficiency.