First of all, what grade is your steel and what kind of pretreatment has it been done? Should it be done cold or hot? \x0d\ Let me just say it briefly as Q235. Just do it cold. \x0d\One is simple wiring, using a special steel pipe bending machine and does not require grinding tools. A machine includes bending and cutting. \x0d\There is also traditional wiring: two punch machines and two molds are required. \x0d\First of all, a shearing die is required for cutting, using ordinary cold-made abrasive steel and conventional heat treatment. \x0d\Two single-thread cloth machines, one for backup and one for use. You have to consider the time it takes to sharpen the knife and replace it. \x0d\ Bending also uses a punch. The stamping tonnage needs to be calculated based on the finished product. The most important thing is to calculate the rebound angle of the grinding tool, based on the material diameter, material yield, bending radius, punch tonnage, etc. But now the places that make grinding tools will calculate it for you. You just need to tell them the processing accuracy. \x0d\Hope it is useful to you.