For the use of torsion bar mechanical synchronous bending machine to improve the performance of the increase in anti-deviation load protection and prevent the slider fall function,in addition to expand-ing the scope of its use in the original successive blocking device on the increase in the R-axis control to meet the more types of sheet metal processing technology,and at the same time in the safety of operation on the key sources of risk between the upper and lower mold mouth,the machine tool to increase the rear side of the hardware and software combination of protective facilities,and with the main control circuit to realize the interlocking control,effectively improve the safety of machine operation.At the same time,in terms of safety operation,the key sources of danger between the upper and lower die mouths,the rear side of the machine tool to increase the combination of hardware and software protection facilities,and with the main control circuit to realize the interlocking control,and effectively improve the operation of the machine safety.