Forming process of auto chair based on sheet metal CNC incremental technology

The CNC incremental sheet metal forming process is a flexible forming process without dedicated forming dies.In process planning,the forming trace of the forming tool can be adjusted by correcting the numerical model of the product.Sheet metal incremental forming of the auto chair is more difficult.In this paper,the CNC incremental sheet metal forming process is analyzed.Based on the above research,the method of processing design(including model building,processing analysis,trajectory creating,HrpDSF proceeding,post proceeding,etc.) has been established.The success incremental forming of the auto chair using the processing design method has provided.The defects occurred in the incremental forming of the auto chair,such as fracture,wrinkle and spring back degrade the quantity of the production.This paper discusses these defects and supposes suitable method to avoid the defects.This is helpful to the development of the sheet metal incremental forming in the future.