Research On The Control Of Modless Single Point Incremental Forming Experiment Device And Detection Technology

Single-point incremental sheet forming is a new type of sheet metal forming technology.Unlike traditional sheet forming methods,the incremental forming process does not require molds or simple supports to realize the manufacture of small batches and flexible manufacturing,and the manufacturing cost is low.To a certain extent,it can complement and promote the de velopment of traditional forming methods.At present,Incremental sheet forming technology has been applied to Aerospace equipment manufacturing,railway transportation manufacturing and medical fields.At the same time,this technology also has problems such as rapid springback,The forming precision of sheet metal is seriously affected and limits the application of this technology in highend fields.In order to further improve the accuracy of incremental sheet forming technology and expand its application range,this research conducted the following research on the rapid springback problem of incremental sheet forming:(1)On the basis of the existing single-point incremental forming experimental prototype,the servo system,control system and auxiliary forming mechanism have been upgraded and developed to achieve precise control of the experimental device.This part of the work mainly involves the setting of basic parameters,such as the transmission ratio of the forming equipment,acceleration and deceleration time,and debugging the FANUC0I-MF PLUS control system,mainly editing and debugging the PMC execution logic.(2)Use the built-in incremental forming experimental device for forming experimental research.Orthogonal experiments were carried out on the processing depth,processing speed and interlayer feed rate of asymptotically forming,and the change law of the influence of each process parameter on springback was obtained,and the process database was formed.(3)Build a springback detection system and carry out research on the springback detection technology of incremental forming.During the experiment,the springback value needs to be extracted.According to the on-site processing environment and detection requirements,the serious diffuse reflection and forming depth of the used plates were analyzed and discussed.Finally,select the KEYENCE line laser profile detector for testing.Extract the springback amount and develop and design the detection interface to facilitate the acquisition of the detection value.(4)Springback compensation method.According to the experimental data of the orthogonal experiment,the springback conditions under different combination of process parameters are analyzed,and different springback compensation schemes are selected according to different springback conditions,and the compensation effect is evaluated,which verifies the feasibility of the compensation scheme.(5)Springback forecast.The research established a prediction model based on neural network,and used Sheffield genetic algorithm to optimize the neural network.The model training data is obtained from previous orthogonal experiments.The research proves that the prediction model established can predict the general trend of the process parameters affecting the springback,and the prediction accuracy needs to be improved.(6)Preliminary study on ultrasonic assisted progressive forming technology.The ultrasonic vibration system was built to assist the progressive forming process and effectively improve the contact relationship between the forming head and the forming sheet.The experiment proved that the ultrasonic vibration could inhibit the springback to a certain extent in the process of progressive forming.