Is it difficult to learn profile bending? How long does it take to operate correctly? 

Profile bending is an interdisciplinary field that involves multiple areas of knowledge, including material mechanics, metal plastic deformation, and mechanical processing technology. Learning profile bending requires a certain foundation of knowledge and practical experience, so it may take a relatively long time of study and practice to master the correct operation. 

Firstly, learning profile bending necessitates mastering relevant basic knowledge, such as material mechanics, metal plastic deformation, and mechanical processing technology. This knowledge can be obtained through reading professional books, participating in related courses and training. 

Secondly, learning profile bending requires extensive practical operations. In practice, students need to learn how to choose appropriate materials, adjust the parameters of the bending machine, and handle surface defects of profiles. These practical experiences can be gained by conducting actual operations in factories or laboratories. 

Finally, learning profile bending also entails continuously summarizing experiences and lessons. During practice, students will encounter various problems and challenges, requiring them to constantly summarize their experiences and lessons to better grasp the techniques and key points of profile bending operations. 

In summary, learning profile bending demands a certain amount of time and effort, possibly taking several months or even longer for study and practice to master the correct operation. However, with serious study and practice, everyone can master this skill and become a qualified profile bending operator.